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Release date: 2026-10-22 
Clicks:From the screen wall configuration of the site board room, the influence of wireless link on the decoding wall, to the configuration difference, flow cost formula and migration service of small/medium/large site, the landing judgment of the site monitoring splicing screen is given.
The most expensive mistake in the site monitoring splicing screen scheme is not that the screen is expensive to buy, but that "using the fixed building scheme to match a site that will move at any time".The monitoring center of the fixed building has wired return, stable power supply, wall bearing and no moving position for five years. The construction site is just the opposite-there is no formed weak current pipeline, the camera is frequently disassembled and assembled with the progress of the project, the return can only rely on wireless, and the monitoring room may be in a mobile board room of several square meters. The biggest difference between site monitoring and fixed building monitoring is not "watching", but in"Even": The quality fluctuation of the wireless link will be directly transmitted to the stability of the decoding wall. The space and load-bearing limit of the board room will directly determine how many pieces of the screen wall can be made and how to install it. The equipment migration after the completion of the project is a business item that must be included in the budget in advance.LCD splicing screen China source factoryThe value of direct supply in the site program lies precisely inNon-standard bracket customization(board room color steel plate wall load is not enough, need floor bracket or special reinforcement),Flexible seam size combination(Small construction sites may only need 2 × 2, large construction sites need 3 × 5, and standard products may not match) andLong-term spare parts supply(The equipment should follow the project turnover and find the same type of panel after five years). This article is carried out in the order of "task division → transmission route → board room screen wall → wireless and decoding connection → traffic cost → disconnection and migration → acceptance", and each link gives a calculable formula and a judgable threshold.
1. first distinguish two lines: local duty on the wall, supervision platform back
The first step in the design of the construction site plan is not to select the screen, but to separate "which pictures should be put on the wall and which pictures should only be returned to the platform. The acceptance caliber of these two lines is completely different.
| Dimension | Local Duty of Project Department | Regulatory platform return |
|---|---|---|
| Core demand | Entrance and exit attendance and real-time pictures of vehicles, foundation pit and tower crane working surface, material area and perimeter; Alarm amplification, can be seen at night | According to the requirements of the local housing and construction department, access to the smart site supervision platform to meet the point coverage and online rate. |
| signal link | On-site collection → wireless return → decoding → splicing screen on the wall | On-site collection → dedicated line/4G → supervision platform (not necessarily through local large screen) |
| Acceptance caliber | Readability of picture quality, alarm pop-up, round-robin, cut-off recovery | Protocol compatibility, online rate, point coverage, video storage duration |
| Common misjudgment | "Platform can see" does not mean "local large screen can see"; "Access to the supervision platform" does not mean "there is a splicing screen on the construction site". The two lines should be listed separately and accepted separately. | |
Territorial regulatory requirements vary widely. Shanghai requires coverage of three types of foundation points: personnel entrances and exits, tower cranes (commanding heights), foundation pits and other dangerous and large engineering operation areas, and the equipment online rate shall not be less than 80% of the number of days to be operated. Shenzhen requires at least 4 monitoring devices for fixed scenes and conforms to GB/T 28181 or ONVIF agreement. Jinan requires the main entrances and exits to monitor and display the attendance screen of personnel.In the scheme stage, the valid documents of the project territory shall be checked first, and then which points need to be put on the wall and which are only returned.
2. transmission route: bridge priority, honeycomb bottom, solar energy only power supply
The choice of wireless transmission at the construction site is not "which is advanced", but a trade-off under the four constraints of "distance, occlusion, power supply, and traffic budget.
| Contrast Item | Wireless Bridge (5.8GHz) | 4G/5G cellular |
|---|---|---|
| conditions of establishment | The point position is relatively fixed, and the sight distance from the convergence point can be reached, and the site is powered by mains or solar energy. | Frequent movements, bridge imfeasible, or point-to-point direct backhaul to regulatory platform |
| Exclusion conditions | The tower crane, material pile and building under construction will cut off the sight distance; the throughput will decrease in rainy and foggy weather. | Long-term high-traffic ingest, traffic costs may exceed the one-time investment of the bridge. |
| Cost characteristics | One-time equipment investment is mainly, and there is no monthly traffic fee for the link. | Low investment in equipment, but continuous flow is charged by traffic, and long-term costs increase with the length of flow. |
| bandwidth judgment | According to the measured throughput, single-channel code stream accounting load number, not according to the nominal rate. | According to the operator's actual coverage signal and package speed limit judgment |
The screen wall of 3. board room: space, load-bearing and operation logic are different from those of fixed monitoring room.
This is the core difference between the site plan and the previous articles (public security, park, factory). The monitoring center of the construction site is usually located in the movable board room or container room of the project department, and the screen wall configuration cannot copy the experience of fixed buildings.
Board room space can put a few screens
The common size of the construction site is 3 meters × 6 meters or 3 meters × 7 meters, and the monitoring area may only occupy one of the walls or a corner. Take the wall surface of a board house with a width of 3.5 meters and a height of 2.2 meters as an example: the appearance of a 55-inch single screen is about 1222mm × 696mm. After deducting the maintenance space on both sides (200mm each) and the bottom maintenance space (300mm), the usable width is about 3.1 meters and the usable height is about 1.9 meters. Lateral 3.1 ÷ 1.222 ≈ 2.5, taking2 columns; Longitudinal 1.9 ÷ 0.696 ≈ 2.7, taken2 lines. The result is2 × 2, 4 screens in total. If the wall surface of the board room is narrower (e.g. 3 meters), it may only be one of 1 × 3 or 2 × 2, and it needs to be made according to the window requirements: the attendance picture at the entrance and exit must be always displayed and large enough, and the perimeter and working surface can be inspected in rounds.
Color steel wall can not be directly wall hanging
The wall of the board house is usually a color steel sandwich panel, and the load-bearing capacity is much lower than that of the concrete wall. The 55-inch single screen is about 15.5kg, the total weight of 4 screens plus brackets and frames may exceed 80kg, and there is a risk of falling off if the color steel plate wall is directly hung on the wall.Floor bracket or floor cabinet shall be preferred for the screen wall of the board room on the construction site., do not rely on the wall load-bearing; if it must be wall-mounted, it is necessary to install steel plate reinforcement on the inside of the color steel plate, and the construction party shall confirm the reinforcement scheme. The front maintenance hydraulic support also has advantages when installing the board room against the wall, but it also needs the support of the wall or the floor structure.
Part-time duty requires simple operation
The site monitoring room is often composed of 1-2 people. The on-duty personnel may be responsible for entrance guard, attendance check and material registration at the same time, and are not professional security personnel. The operation logic of the screen wall should be simplified as much as possible:The regular display screen is fixed (entrance and exit, tower crane, foundation pit), the round-robin screen runs automatically, the alarm is automatically enlarged to the designated window when triggered, and the standard layout is restored with one key for shift change. Do not design complex plans that require multi-step menu operations, and part-time personnel do not have time to learn.
Cooling: The thermal insulation of the board room is poor, the internal temperature in summer may be significantly higher than that of the outdoor, and the heat dissipation conditions of the screen body and decoding equipment are worse than those of the fixed room. When selecting the type, the working temperature range of the screen body should be confirmed, and whether the board room needs to be equipped with exhaust fans or air conditioners should be evaluated.Power supply: The power supply capacity of the board room is limited, and the total power of the screen wall decoder lighting air conditioner needs to be calculated to avoid overload. Screen wall and decoding equipment should be connected to independent circuit, not shared with high-power equipment such as welding machine.
How does 4. wireless link quality affect decoding wall: buffering, reconnection, degradation
The most easily overlooked link in the site plan is:The bandwidth fluctuation and delay fluctuation of the wireless link will be directly transmitted to the stability of the decoding wall. The throughput of the bridge drops in rainy and foggy weather, and the delay of the cellular network jumps from tens of milliseconds to hundreds of milliseconds. If the decoder does not have a buffering and reconnection mechanism, the picture will be stuck, colorful or black.
| Link problems | Impact on the picture | Capacity to be identified by the programme |
|---|---|---|
| Bridge Throughput Decreased (Rain, Fog, Occlusion) | Catton, frame drop when multi-channel simultaneous streaming | Whether the decoder has input buffer; Whether to support the code stream adaptation or rate reduction strategy; Whether there is a margin for the bridge load (60%-70% of the measured throughput) |
| cellular delay fluctuation | The screen pops up slowly after the alarm is triggered; there is a pause in the round-robin switching. | The measured value of the end-to-end delay (recommended to be written into the contract); whether the "real-time priority" mode is supported. |
| Recovery after link interruption | Black screen, need to manually reconnect after recovery | Whether the decoder supports automatic reconnection after disconnection; How long the reconnection time is; Whether the picture returns to the original window layout after reconnection |
| Concurrent multiple access streams compete for bandwidth | Part of the picture caton, part normal | Whether to support bandwidth allocation by priority (constant display screen priority, round-robin screen bit rate reduction) |
The acceptance of the site plan cannot be measured only when the "network is normal. The drop in bridge throughput (such as blocking the antenna or reducing the transmission power) and the increase in cellular delay should be simulated to observe: whether the picture is stuck, how long the stuck lasts, and whether it is automatically restored; How long does it take to reconnect after disconnection; Whether the alarm trigger can still pop up when the link deteriorates.These test items should be written into the acceptance outline, instead of only "normal picture after power-on".
5. number of decoding paths and traffic cost: two numbers that must be calculated
Number of Decoding Rows: converted by the always-displayed window, not by the total number of cameras
The number of site monitoring points increases with the progress of the project, but the decoder does not need to be filled at one time according to "there may be hundreds of roads in the end. The conversion logic is:Number of screens x number of constant display partitions = simultaneous decoding requirements. The round tour is time-sharing and does not increase the simultaneous upper limit.
The frequently displayed pictures (entrances and exits, tower cranes and foundation pits) on the construction site are divided into 2-4 screens and the round-trip pictures are divided into 4-9 screens. Leave 20%-30% allowance for new projects
Take 4 55-inch screens (2 × 2) as an example: entrances and exits and tower cranes are divided into 4 parts with 2 screens (8 roads in total), foundation pits and perimeters are divided into 6 parts with 2 screens (12 roads in total), and decoding requirements are about 8-12 roads 1080P. If the decoder supports 16 channels 1080P on a single machine, one can cover it, leaving a margin. If it is a large construction site (more than 10 screens, multiple tower cranes and multiple bid sections), multiple decoders or multiple outputs may be required according to the same logic.
Traffic Cost: The Biggest Hidden Cost of Cellular Solutions
Not counting protocol overhead and retransmission, it is actually only a lot more. It is recommended to reserve 20%-30% buffer.
Take 1080P/H.264/2Mbps as an example: round-the-clock continuous backhaul is about 633GB/month; If only the on-duty period (e.g. 7: 00 a.m. to 7: 00 p.m., 12 hours) is returned every day, about 317GB/month; If the stream is only taken when the alarm is triggered and checked regularly (2 hours per day), it is about 54GB/month. The traffic cost of the cellular scheme must be calculated according to the "number of flow paths x flow duration x code rate", rather than the "monthly package" in general.Local storage is not equal to saving all backhaul traffic-As long as the large screen is continuously fetching flow, the flow will be consumed.
6. site size differences: small, medium and large configuration logic is different.
| Site scale | Typical Configuration | transmission route | Core focus points |
|---|---|---|---|
| Small construction site (dozens of points, 1-2 screens or 2 × 2) | 49/55 inch, 2 × 2 or 1 × 3,3.5mm patchwork, floor bracket | Bridge-based, individual distant cellular | The entrance and exit attendance screen can be identified; the operation is simple; the migration cost is low. |
| Medium-sized construction site (100-way level, 4-9 screens) | 55 inch, 2 × 3 or 3 × 3,3.5/1.8mm, floor cabinet or reinforced wall mount | Bridge Convergence Cellular Backup | Multi-tower crane/multi-work surface wheel patrol; alarm linkage; flow cost controllable |
| Large construction site/multi-bid section (more than 10 screens, multi-site convergence) | 55/65 inches, 3 × 4 or more, 1.8mm, distributed or centralized | Bridge backbone dedicated line/4G backhaul platform | Multi-site grouping convergence; master control scheduling; migration service in a single column |
7. disconnection and relocation: the "exit" link that must be designed for the site plan
Layered processing of broken network
Site disconnection is normal, not abnormal. Three things must be verified separately:Real-time stream recovery(How long will the large screen come back after the network is restored),Local video remote access(Whether the front-end continues to record during the disconnection period and whether it can be accessed remotely after recovery),Automatic supplement of historical video(Whether the platform can automatically adjust the video recording during the network disconnection period). Supplementary video transmission does not mean resumption of real-time monitoring, and the three items are tested separately during acceptance.
BREALOW TIP: AVOID "FALSE REAL TIME"
The window after the cut-off shall be marked with "signal interruption" and the last update time to prevent the on-duty personnel from mistaking the frozen picture for the real-time picture. Whether to use a frozen frame or a broken stream accounting bitmap is determined by platform capabilities and contractual agreements,Prompt must be visible。
Project Migration: The Business Core of the Worksite Scheme
After the completion of the site, the equipment will be turned over with the next project. When purchasingDisassembly, re-networking, re-debugging, SIM package changeListed as a service item, it is clear who will do it and what will be charged. This is the biggest difference between the construction site plan and the fixed construction plan in business-the equipment of the fixed construction will be installed for five years, the equipment of the construction site may be changed to another place every year, and the pricing method of the relocation service must be clearly written in the contract, otherwise the cost of later wrangling may exceed the screen itself.
QunmaoChinaLCD splicing screen source factoryThe value of direct supply in the construction site plan cannot be summed up by the word "cheap. The special needs of the site are:The color steel plate wall of the board room is not bearing enough, and floor support or non-standard reinforcement scheme is needed.-The source factory can customize the bracket according to the actual size of the board room and the wall conditions, instead of letting the integrator "gather together" in the standard products ";Large differences in site scale, diverse patchwork and size combinations-Small construction sites may only need 2 × 2 3.5mm, large construction sites need 3 × 5 1.8mm, and the panel gear and size coverage of the source factory are more flexible;Equipment to follow the project turnover-- After the splicing wall is disassembled and reassembled, it needs the continuous supply of panels and spare parts of the same model, and the spare parts guarantee of the source factory is more reliable than that of traders. Taking Qtenboard as an example, its public data show that it supports 43-75 inch full size, 8mm to 0mm full patchwork gear, supports OEM/ODM/CKD/SKD cooperation mode, has self-operated manufacturing base and 48-hour aging test and color calibration process, and the product is designed for 24/7 monitoring scene. For worksite projects, this meansThere is no need to "gather together" in the standard", but according to the board room space, viewing distance and window needs to choose the stitching and size;Spare parts supplyIt is also more controllable than traders-when the equipment is turned over to the next site, the same type of panel or module can be found. During the evaluation, it is essential to verify the factory’s qualifications, the source of the panels, and actual case studies, rather than relying solely on the label “directly supplied by the factory.”
8. Acceptance List and Common Mistakes
| Acceptance Items | Test conditions | Basis for determination |
|---|---|---|
| Access readability | Use the real picture of the construction site and display it according to the constant display layout. | Whether the personnel characteristics and license plate can be identified; whether the attendance overlay information is clear |
| wireless link with load | Measure the throughput of the bridge at the target distance, and calculate the load margin according to the code stream. | The load number shall not exceed 60%-70% of the measured throughput; No Catton under rain and fog conditions |
| cut-off recovery | Resume after analog link outage | Real-time stream recovery time, local video access and supplementary video transmission meet the standards respectively. |
| Alarm pops up | Analog Helmet/Zone Intrusion Alert | Picture pop-up time, correct position, recoverable |
| low night light | Light up the whole wall at night | Low bright gray scale can be identified; personnel on duty is not dazzling |
| Migration service | Verification of Contract Terms | The pricing method for disassembly, networking, debugging and SIM change is clear. |
- Myth 1: Use a fixed building plan to match the site. The color steel plate of the board room can not be directly hung on the wall, the power supply capacity is limited, and the space is narrow. The size of the screen wall, installation method and heat dissipation design shall be re-verified according to the conditions of the board room.
- Misunderstanding 2: only look at "the platform can see", no matter "the big screen can see". Regulatory platform access and local duty on the wall are two lines. Platform access does not mean that there is a splicing screen on the construction site, and large screen acceptance does not mean platform acceptance.
- Myth 3: The bridge is loaded at the nominal rate. A nominal 433Mbps bridge may only measure 200Mbps at 2 kilometers, and rain and fog will drop. 60%-70% of the measured throughput shall be loaded with allowance.
- Myth 4: Ignore the impact of the wireless link on the decoding wall. Drops in throughput and delay fluctuations can cause stuck, slow ejections, and cut-off. The link deterioration must be simulated during acceptance, and the picture when the network is normal cannot be measured only.
- Myth 5: Traffic is generally estimated by "monthly. Traffic = code rate x duration x number of paths. The traffic difference between the three modes of all-weather, on-duty period and alarm trigger is an order of magnitude. According to the formula, reserve a buffer.
- Myth 6: Migration services are not written into the contract. The site equipment should be turned around. The workload and cost of disassembly, assembly, networking, debugging and SIM change should not be agreed in advance, and the later wrangling cost may exceed the screen body.
9. FAQ
Can the construction site board room be equipped with splicing screen?
Can be installed, but can not copy the fixed monitoring room installation. The color steel plate wall of the board room has limited load-bearing capacity, and the floor bracket or floor cabinet is preferred, which does not rely on the wall to bear the load. If wall hanging is necessary, steel plate reinforcement needs to be installed inside the color steel plate. The space of the board room is narrow, and the size of the screen wall is usually 2 × 2 or 1 × 3. The screen must be displayed frequently at the entrance and exit according to the window requirements. Power supply and heat dissipation also need to be separately accounted.
Can the site camera directly connect to the splicing screen?
Can not be directly connected. The liquid crystal splicing unit receives the decoded display signal, and the front-end screen is only displayed after wireless backhaul, platform access, decoding and windowing output. When the 4G camera only provides App streaming, it is also necessary to confirm whether the system has the TV wall management capability. At the time of purchase, the capacity of the whole link of "return link decoding on the wall" is checked, not just the screen parameters.
Bridge and 4G how to choose?
On-site networking priority bridge: when the point is relatively fixed and the sight distance is reachable, the bridge is invested at one time, there is no monthly traffic fee, and the long-term cost is lower. 4G/5G is used when the bridge cannot reach (long distance, heavy blocking) or the point directly returns to the regulatory platform. The selection is based on "distance, occlusion, power supply conditions, flow budget", not "which is advanced".
How to estimate the cost of site flow?
According to the formula: single-channel monthly traffic ≈ 0.45 × code rate (Mbps)× daily return hours × 30. 1080P/2Mbps all-weather about 633GB/month, 12 hours a day about 317GB/month, 2 hours a day about 54GB/month. According to the actual number of flow paths and duration, 20%-30% buffer is reserved. Local storage does not mean saving backhaul traffic. As long as the large screen continues to fetch traffic, traffic will be consumed.
What about the equipment after the completion of the project?
The equipment turns around with the next project. Disassembly and assembly, re-networking, re-debugging and SIM package change are listed as service items during procurement, and the pricing method is clearly defined. This is the biggest difference between the site plan and the fixed plan in business. The migration cost is not agreed in advance and it is easy to wrangle in the later period.
What is the use of the source factory to the site plan?
Three points: the color steel plate wall of the plank house needs non-standard bracket or landing scheme, and the source factory can be customized according to the actual size; The scale of the construction site is very different, and the combination of splicing and size needs flexible configuration. When the equipment is turned over to the next construction site, spare parts of the same model are required. Check factory qualification and panel source during assessment.
10. Conclusion
The complete judgment chain of the site monitoring splicing screen scheme can be compressed into six steps:
First, it is divided into two lines (local on-duty wall/supervision platform return) → select the transmission route (bridge priority, honeycomb pocket bottom, solar energy only supplies power) → set the screen wall according to the conditions of the board room (floor bracket, 2 × 2 start-up scale, minimal operation) → influence of nuclear wireless link on decoding wall (buffer, reconnection, degradation) → calculate the number of decoding routes and traffic cost → write off-network processing and migration services into the contract.
The professionalism of the site plan is not "how big the screen is", but inThe entrance and exit can really be seen clearly, the wireless can really be recovered when it is cut off, the traffic is really accurate, and the equipment can really be moved away.. The board room is not a fixed computer room, wireless is not wired, and turnover is not an installation. Write these judgments into the screen wall configuration, link acceptance and migration terms, and then use them.LCD splicing screen China source factoryThe site monitoring wall is not a "decoration for inspection", but an on-duty tool that the project department really relies on.
The board house is not hung on the ground, and the bridge is not nominal. The flow is calculated according to the formula, and the migration is written into the contract.
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