【 Weak current College 】 professional audio engineering (construction)---Power By 【 China power house network 】

<br> <BR> <BR> 1. the characteristics of construction technology and technical requirements of professional sound engineering <BR> <BR> Another important element is the construction works. .With good planning is not scientific and rational design and selection can not, have a good selection and there are no standard design and construction can be *, is also not acceptable. .It's like the same clothes, the same piece of fabric, tailor made technology out of different quality may be completely different clothes, professional sound engineering is also the case, good planning, good design, layout, better social selection, the device is only released .where the free replacement, single transport equipment, not installed, connection and commissioning can work as a system, any design can only be on paper. .Especially in recent years a variety of sound engineering in society very much, some do not regulate the design and construction technology, many companies took the opportunity to shoddy construction, or not so good equipment to play the appropriate effects, or make the system work .stability, security is difficult to guarantee, making the sound works the importance of technology become more prominent. .In summary, for most professional sound engineering, the construction technology has the following characteristics. .<BR> <BR> First, the projects with high technical content. .Should be said that sound engineering and other engineering the biggest difference is in the actual installation, commissioning and construction, always need to deal with a variety of devices, these devices are in different systems may play an important role, they are installed .and commissioning of requirements are not the same, a little unreasonable it may affect the whole system works, so the higher levels of construction technology. .Meanwhile, construction of high technology is also manifested in the construction of the signal lines that require higher welding technology, welding technology * to mount parts, scientific and standardized testing technology and many other aspects of debugging. .<BR> <BR> Second, the project's flexibility, small quantities, but heavy responsibility. .If a project has been strictly rational design and selection, in the concrete construction is equipped with a qualified construction team, in close collaboration with architectural units, the project's duration generally will not be too long, even the great .a project, there are several hundred days to complete small projects on faster. .In such a construction features, engineering often because of a variety of objective factors on the construction process need to make corresponding adjustments, sometimes because of the design and contradictory and the built environment need to be amended, the project's construction may also .change the plan, which is the flexible construction reasons. .Works great responsibility, we must easy to understand, the majority of the general sound engineering investments have hundreds of thousands, tens or even hundreds of million, to be in a very short period of time to achieve good sound, lighting, video effects, the responsibility .must be very heavy. .<BR> <BR> As sound engineer, high technology, heavy responsibility, then the corresponding engineering techniques to make certain requirements should also be summed up in the following points. .<BR> <BR> First, the sound works must have a qualified construction team. .Any works should have a qualified construction team, so that the quality and progress of the construction will be guaranteed. .Audio works should be, because all the sound works very particular about security, but it is difficult to rework an unqualified construction workers in construction may be due not only to the construction of the error affected the progress in works, and it is .easily lead to security failure or equipment damage, to the construction unit brought considerable losses. .Here, the qualified construction team include: working with a number of technology license with the appropriate electrician, welder and electronics technicians; with some professional audio and lighting technology, engineering staff, in particular, need to have practical experience in audio and lighting equipment operators technical staff .as engineering and technical assurance. .<BR> <BR> Second, project construction must be in strict accordance with the requirements of the design. .The previous design, we have found that: professional sound engineering is a complex and involve a number of technology projects, all of its technical characteristics and indicators included in the theoretical design of all inside, and the design is fully integrated in a variety of conditions, strict .After the completion of calculation, in order to meet planning requirements, works to be carried out strictly in accordance with the design, the final quality of the projects is also closely related works. .If their experience in the engineering construction carried out by imagination, it is difficult to guarantee the quality of the project. .<BR> <BR> Last requirement works in strict accordance with relevant national and industry technical standards. .Sound engineering in the construction of various types of work need to be addressed, the construction of these types of technical requirements and safety requirements are different, the technical standard is developed for the corresponding characteristics of the work, and only in the construction of strict compliance with these technical standards ., engineering quality and safety can be guaranteed well. .<BR> 2. <BR> <BR> The steps of construction works in front of the technical characteristics and technical requirements for a simple explanation, the following specific construction projects will be carried out. .Although the technical complexity of sound engineering high technical standards will be more, but as long as reasonable construction in accordance with certain procedures, or works carried out smoothly. .The following works under normal circumstances, the construction of the project to explain the steps. .`<BR> <BR> First to mount a variety of lines and embedded parts. .This work is the first to start construction, and most should be started as soon as possible, often articulated in terms of embedded parts of these lines and the structure of the time to start building the best, it can not only get the choice of embedded point .security guarantees, but will not make the back of the architectural decoration construction affected, more importantly, the majority of the pipeline and attached pieces are set in the ground, the stage, the walls, the ceiling on top of the structure of the building once missed, .embedded work carried out is almost no longer. .Embedded design requirements should be chosen according to material, diameter, length of the pipe and mount the right pieces, embedded in the design position. .For each type of pipe, be sure to put wire in advance, and then sealed all openings and make the appropriate mark; groove for a variety of embedded, secure connection to pay attention to them; the need bear the load of the hanging .to pieces of embedded, be sure to get in the load-bearing construction unit of the safety approval, but also in the careful handling of the concrete, laying of the best parts at the top of the mount and the load-bearing beams of the room together firmly, planted in the .Wall pieces must be mounted inside the wall where the bolt or iron set, welding mount in a variety of structural parts, in addition to welding firm outside the load-bearing parts should also avoid damage. .In short, the pipeline and attached to pieces of embedded carefully carried out, except in strict accordance with design drawings marked the location, quantity, material other than to regulate the construction, laying of security must attach great importance, especially in some large-scale entertainment .Most are set up complex lighting system, a corresponding need to mount a large number of embedded pipes and fittings, security should not be overlooked. .There would also like to remind everyone that: the opening of various embedded in the pipeline must be sealed to prevent infiltration of water vapor in the future jeopardize the safe use of line; pre-set to wear the best do not use steel wire instead of, or may be due to corrosion of lead .behind the threading on the job. .<BR> <BR> Followed by a variety of scaffolding to welding and installation. .Basic professional sound engineering equipment have different amounts of light, so a variety of scaffolding, welding, installation is essential. .Because in the welding and installation process will inevitably need in the construction and decoration of the structure of open holes or produce damage, so this work is best carried out with the decoration to pay * for their help at any time. .Welding with a welding construction permit must let the workers to operate, this addition to security requirements, the welding quality is exceptionally important thing, once the reasons for the accident due to welding, the construction unit will bear a heavy responsibility. .Meanwhile, when the welding construction works along with the decorations, the scene will inevitably have some flammable, so be sure to pay attention to fire safety measures. .To be welded solid, paint is complete, then you should start the installation of these scaffolds. .First, the installation of security is equally important, there must be presence of construction techniques, a variety of load-bearing points must be hanging their confirmation; Secondly, the installation must be prepared before the construction of adequate tools, in particular, such as large-scale installation of roof lights .parts, installation, pulleys, lifting cars like the equipment is necessary; Furthermore, the installation process will inevitably encounter a variety of situations, so be sure to wait until the installation of a more adequate staff time begin again, hoisting Once .location, our actions must be coordinated smoothly. .Finally, the end of the installation, be sure to all the scaffolding of an additional protective measures accordingly, so that installed security to get to * guarantee, protection measures can be wire, which can be welded, the principle is: have to be treated as .Install the same treatment, when the accident occurred because the protective measures are often played a key role. .<BR> <BR> Then a variety of cable laying. .Sound engineering generally have a lot of different types of cables, these cables need to advance in the laying of pipeline in the embedded, or connected with the system, laying a certain position in the control room. .First of all, before laying the cable in accordance with the design requirements to a variety of classification put away lines, pay-off should be carefully, one by one try to make clear the mark, as the basis for the installation and maintenance of the search, do not mess with the cable, while .sure to leave plenty of spare capacity, will never be allowed between the cable connector, place a line after each line carefully examined for damage or poor quality of the situation, if there is to be replaced all at once; the laying of the cable must be designed in accordance with .exact location and layout of the place; Second, because only one chance to lay the cable, virtually no possibility of rework, so in control when laying design drawings, a reasonable method of control, absolutely can not hope to map fast and reckless, or may .unnecessary trouble. .For example: wear a tube bundle when the cable is the key, if the bundle is unreasonable, resulting in blocking or pulling wires through pipes from the address it is more trouble, so be sure to wire, tightly tied head to help reduce the resistance, .when necessary, apply a small amount of oil; online slot as far as possible when laying cable for a class of cable tied together, in order to facilitate the laying of, or, in lay twitching back and forth when the inevitable intertwining can make the cable; Finally, .When asked in the cable laying construction workers to coordinated, consistent action and the force should be uniform, if you encounter a turn, linked to touch, they must be careful, collaborative solution. .In addition, the cable laying work, a very important but often overlooked is the system of protection of ground work of laying and the laying of the signal shield wire, and because very few people the concept of the two clear cable .distinction, leading to many professional engineers and technicians are also confused about the actual error occurred in construction, which is why many audio systems can not afford to always have to eliminate the noise, and some lost ground effect system protection, equipment, live shell .reasons. .Here we combine two schematic here to tell you about. .Protect the ground is laid for all pre-electrical engineering to protect the personal safety of the line, it is generally in the distribution panel in a single setting, in a standard socket also set the ground at the other end, through the protection of ground .excellent electrical conductivity of a good body buried in the earth, the guaranteed low resistance to ground to achieve a good grounding effect, the ground is truly took to the ground, the actual use, basically according to the situation .It is with the equipment, the electrical conductivity of the cabinet enclosure or connected together, once the device leakage phenomenon occurs, current will flow to return to earth very quickly, thus forming the protection of the human body. .Shield the sound system, many people are also known as ground, strictly speaking, simply say this is wrong, accurate signal to the system about the zero level in the signal reference point, the ground may be connected with the earth is ., and also may not be connected, is not connected with the earth shield the network depends on the situation or the scene of anti-jamming electromagnetic interference case may be, it seems, can only be a clear signal that it is in line for the signal .The relative ground made after the call the so-called ground will be right, but in order not to be confused with the ground in front of the protection, we accurately called the shield as well. .To protect ground in laying generally must be set, and should be well-connected, or connected directly to the cabinet, or through the power outlet and the device itself ground the same, after the laying of the best equipment and the ground one by one check all the conduction .conditions; signals require a combination of shielding Laying back connections, as well as system requirements and noise on the circumstances, this relates to the signal line connection, shielding the establishment of the network, we will explain later in a separate content page. .System requirements for the project or the higher the case of strong electromagnetic interference field, laying the cable for the audio system can be considered a separate signal buried their true ground, burying ground and power requirements of the basic requirements of basically the same, but with the power .separate ground, and laid a careful analysis of the necessity and feasibility should be. .Finally need to remind you is this: While laying the cable appears to be simple, for when it faster, but if they only fast, blind reckless, and have actually blocked or easily lead to the engineering construction work to stay hidden. .For example: if a variety of pipe buried in the cable to wear when the force is too large or touched by the tube hanging open, so that the cable insulation damage, the light makes the signal quality be affected, while in power lines caused leakage, the actual .use would jeopardize the safety of equipment and personal, so we must give due attention to this seemingly simple task. .<BR> <BR> Then the following is the installation of various equipment and rigging. .Because the price of professional audio and lighting equipment are relatively expensive and the installation of many devices have to be to avoid contamination by dust, so the equipment installation and rigging work should be carried out after the completion of the decoration, the decoration of the clutter from the scene of the disturbance. .Installation, rigging equipment, one by one out of the box before checking whether there is damage, whether all the parts and instructions are complete, and finally each piece of equipment necessary for the work checked. .In particular the packaging of many products abroad, rather special, often there will be some spare parts packed in a box somewhere, some time will be easy to be confused with the foam, and place the parts together with the packaging is still out of things, so for each .pieces of equipment, the packaging should be carefully checked. .Carefully before installing the equipment needed to install the operating instructions to master the correct method of installation. .For example: computer lamp bulbs and reflectors are required to wear soft lenses cotton gloves for installation work in order to avoid light bulbs affected by perspiration damage, so that contamination affecting the lens reflective quality. .Installation must be in accordance with the requirements of design and layout, especially the lighting is absolutely not allowed to change the location, audio equipment typically require the installation of power amplifier in one rack in, and peripheral equipment in a cabinet, the same part of the equipment with the most .placed in a good position to see, these are the bass amp, these are after market speaker amplifier, peripheral equipment installation is also more particular about the location and generally require the frequent use of the equipment installed in the user-friendly place, the basic need to adjust .equipment installed in hidden places, such as: After the equalizer in the project do not need to adjust the basic, the best and do not easily adjusted, so often they are not easy to adjust the focus on installing the bottom of the cabinet, the purpose is to avoid accidentally bump the .changes in commissioning the balanced position; like effects, actuators, pressure limit, and DVD players, video recorders and other equipment to be installed in easy-to-position, of course, the installation of equipment but also on the signal cable connection, as short as possible .distance connections. .A final note is that the installation of all equipment must be safe and secure, and to set up some protection measures, particularly lighting equipment, most of the time they are installed in the room or the top of the stage, and weight, the location may also be high .often movements, so make sure to install safety. .<BR> <BR> Following are power lines, control lines and signal lines connected. .All equipment to be installed in place, and after security checks to ensure correct, it should be the construction of various lines of connection, which is both a need for qualified technical and requires a serious and responsible spirit of the work, so it should be skillful arrangements and responsibilities .heart strong person. .First, about what the signal cable. .Audio lighting project will involve a variety of different circumstances the signal cable connection, in the actual projects generally include the laying of the signal lines connected to the device, and the production of a number of cable to plug equipment. .Will bring in the signal cable to the device, some relatively simple, it is important in accordance with the requirements of the corresponding plug can be welded to the signal line, only to note: 1. What equipment requires plug plug plug what is necessary to weld can .unbalanced connections do not use a balanced connection, can not use XLR connector TRS connector, 2. welding must be avoided plug the other end of the signal lines on the device, which end in the electric soldering iron, .to avoid damage to equipment, 3. signal line behind the shield welding to comply with the production of stress on the signal line. .According to the signal line connected to another important project requirements, at the beginning of the signal cable connection, we need to design the equipment connection diagram and layout, calculate the number needed, what, how long the signal cable, and then let .* e-welding technology with available personnel in accordance with the requirements of making the signal line, in general, engineering, need to make the signal line are: a large core of the big two two core TRS for TRS, the core of a large two-TRS .The lotus on the lotus, the two cores on a large lotus flower, lotus, TRS, XLR male on female XLR, TRS XLR female on the large two-pin XLR female on, TRS XLR male, and so on .dozen specific types of correspondence between the pin welding books have the explanation, we have not introduced here to explain the need to focus on the handling of the shield, which we mentioned earlier, signal shielding networks. .Of professional audio lighting and video system is more complex, more equipment, equipment distribution areas may also be wider, of course, the signal transmission, processing is also relatively far distance, the system work site there are some kinds of power, electric field, .electromagnetic interference, all these factors together could make the signal may be vulnerable to the impact of these different degrees of interference, the interference of the power we have in front of the electrical design, the sound power by a separate wiring, the lighting power lines and other systems .separate power supply and the construction phase sequence will be consistent with some other way to solve; for the interference of electric and electromagnetic fields can only shield the signal lines by connecting a network to solve the subsystems must be connected to network and .The system must not be shielded networks connected to each other, so as not to interfere. .Interference with the sound system because the most vulnerable and most likely will interfering reflected by sound effects, but also most likely to be noticed, so the main task is to shield the network shield the sound system set up. .Establish the principle of sound system is to shield the electric field or electromagnetic interference shielding isolation or through the interference signals into the earth, while the shield itself can not interfere again, which requires the signal line and shield each go on their ways to the shield .true to form a complete network, and these networks can not easily re-form a closed loop interference with large coils. .Shield the signal line and is easier to go on their ways to do, as long as the signal plug the role of the various pins, and signal transmission in the form of clear, consistent connection can be maintained phase; to form a complete network and the closed loop .The need to deal with the problem up more experience, strictly speaking, as long as all the audio signal line shield can be connected to form a network, but in practice often works to do so not because the system often occur due to the shielding layer to increase the noise .take place, or set the ground state of each device's suspension, and some unbalanced and balanced connections need to change the location of the line, so that may mask the system will be very confusing system, it is generally in the actual projects are often shielded .line one end of the ground, and ground equipment using star-style centralized connections. .Specific production, the need to solder only one end of the shield signal lines feet in the ground, watching as to do so, according to experience, the welding points are usually taken at the end of signal transmission, the strongest anti-interference ability, from the connection diagram .seen in these signals we need to shield welding wire to the other side empty, and make precise marks and line number, according to the signal line connection diagram checkmark these devices plugged into the corresponding interface; final .We only need to be a signal to all devices together and connect to the mixer, forming a signal is always ground, laying the ground or through a separate audio signal ground to earth ground or not to introduce specific .situation can debug the system noise may be, this way we not only form a network of anti-interference shield, but also effectively avoid the closed loop, the actual significance of the larger project. .Secondly, we need to connect the control lines as required, relative to the signal cable connection, the control line is relatively simpler, and these are basically the line of control systems and auxiliary equipment, lighting circuits, signal lines in accordance with generally the same as long as the welding .accuracy can be had; finally power cable connections, the need to ensure that this work is the first case in the absence of electrical work, otherwise, not only security but also easy to damage the equipment can not be guaranteed, and the second requires the construction .electrical installation in strict accordance with specifications. .Because the electrical installation engineering specification is not only reasonable to test whether or not the standards, and whether or not in accordance with construction standards will also affect the quality of the projects, many high-quality projects in the regular wiring, card line, tied the line technology, one can see on the .quality of the project have a general understanding, these are the basis for construction, should be taken seriously. .<BR> <BR> Final is on, power supply and connections of the inspection. .Involved in professional sound engineering as a connection point, connectors and a variety of more than the number of signal lines in the engineering, installation and connection error is inevitable, so careful examination is necessary. .Check the items include: equipment installation location is correct, it can be guaranteed safety, power lines is reasonable, connectors and plug points are correct and so on. .<BR> <BR> Construction steps described above, we can find: professional audio lighting project construction sequence is rule-based, as long as we work more in the actual exploration, and more sum up, I believe for all types of .equipped for sound construction, of course, is always safety awareness should not be forgotten. .During the construction before we should handle all kinds of construction procedures, including: welding permits, aerial permission, or consent of the units in the building construction permit projects; project construction will inevitably use of fire and Dianqi Han and other equipment, the construction of certain .prepared to make fire; each must be a comprehensive inspection after construction electricity and fire safety and to avoid all risks. .Only then can our works under the premise that security is guaranteed to achieve quality and efficient results. .<BR> 3. Notes on construction <BR> <BR> introduced through the construction above we can see that the construction of professional sound engineering is a relatively complex task, if the construction technology or a rash, but hard to .Construction quality is easy to be affected, the following rule of thumb to tell you about some construction considerations. .<BR> <BR> First of all, in addition to strict compliance with the local needs of the design and the corresponding specification, but also some minor aspects of attention, otherwise, could still affect the construction. .For example: the export pipeline deal with embedded little attention, or the nozzle is high, or poor positioning, or the appearance of architectural decoration, as long as these issues a little attention in the embedded can be solved, if the post-processing relative to .much trouble. .Another example: Some of audio and video equipment, power supply is provided by 110V AC transformer attached to the work, equipment and 220V plug socket in the form is no different, if not pay attention to the confusion, the consequences can be imagined; addition of a .These audio peripheral equipment using the AC low voltage power supply, some low-voltage DC power supply and equipped with power accessories and no significant difference between the general, if the line connection mistaken identity, ranging from equipment does not work, heavy equipment is easily damaged, we can see the construction of minor .links should also attach importance to. .<BR> <BR> Secondly, the construction sequence to be organized. .If the project start to see what to do, topsy-turvy, the results may affect the construction schedule. .For example: equipment installation this step must wait until the pipeline, articulated pieces laid Well, Laying then be carried out for various reasons, otherwise you will have to re-entry, the time is right, the installation of equipment was not so passive, not only .are carried out quickly, but also not mechanically copying the design, when necessary, can follow the case of pipelines and the line to adjust the installation location. .<BR> <BR> Final project is the construction safety must always lead to a high degree of attention. .Construction safety regulations can not only make the quality of the projects and construction of the security is guaranteed, and can make works smoothly. .For example: If you do not pay attention in the construction of electrical safety, not to mention personal safety will be affected, even if it is not pay attention to the short welding line to open the device signal plug is damaged, especially the system of vital equipment, and that progress of the project would be .impact. .<BR>.