How to calculate the number of monitoring splicing screens? Equivalent Screen Number Physical Check Full Caliber-Qunmao Display

How to calculate the number of monitoring splicing screens so as not to overturn: from equivalent screen number to complete caliber of physical verification

Guide to the calculation of LCD splicing screen scheme for parks, factories, transportation, public security, government affairs centers and energy stations

To do the monitoring splicing screen scheme, the easiest link to roll over is not equipment selection, nor installation and construction,How to determine the number of screens. The customer shook his head when he looked at the budget and felt that you were piling up equipment. Not much, the attendant stared at the full screen on the day of delivery, and the acceptance form could not be signed. The balance point in the middle, which not only makes customers feel that the money is well spent, but also makes the attendant see clearly, is called "equivalent screen number" in the industry ". This article explains the computational logic, hierarchical display strategy, physical checking and decoding constraints once and for all, and is suitable for pre-sales engineers, system integrators and Party A's weak current leaders to use directly.

1.'s make it clear first: the full-quantity co-expression formula is only the starting point, not the answer.

The most basic calculation formula everyone knows:N = number of monitoring paths ÷ number of single screen divisions ⌉, rounded up. There are 4 divisions, 9 divisions and 16 divisions commonly used in a single screen. The above 25 divisions are theoretically feasible, but they are basically not used in actual projects, because the picture is too small to see the face and license plate clearly, thus losing the meaning of going to the wall.

According to this formula, 100 road 9 is divided into 12 pieces, 500 road 56 pieces and 1000 road 112 pieces. The number itself is true, but if you write directly in the bidding document that "112 55-inch splicing screens are required for 1000 roads", the customer's first reaction is often "are you going to dismantle and cover the entire monitoring room". The problem lies in the premise--In real projects, it is almost impossible to get all the roads on the wall at the same time.。

The actual practice of domestic B2B projects is to display hierarchically: key lenses such as entrances and exits, hazardous chemical areas and perimeters, with fixed single-screen single-screen single-picture or 4-division to ensure clear viewing; Ordinary area lenses are covered by 9 or 16 divisions to ensure full viewing. The secondary lens rounds, a group of 25 to 50 roads, switching once every 5 to 10 seconds; When the alarm is triggered, the linkage elastic window is enlarged. Four strategies stacked together, is the real screen demand.

Therefore, the bid calculation shall be based on the equivalent screen number:Number of key picture blocks, number of common roads ÷ number of reserved blocks in round tour group of 9. Take 800 road as an example, 40 road is mainly calculated as 40 pieces according to a single picture, 560 road is generally divided into about 63 pieces according to 9 pieces, and 4 pieces of round patrol area are reserved for 200 road's secondary round patrol, totaling about 107 pieces, and then a neat array of 7 × 16 or close is formed. For the same 800 road, the full caliber of the same display needs to be divided into 89 pieces and 9 pieces to start, and the key points have to be dismantled again. Instead, the equivalent caliber is closer to the actual use. The key is that you should write this caliber clearly in the plan so that the bid evaluation experts and Party A can understand that you are not cutting corners, but configuring according to the usage scenario.

2., don't rush to hand in the manuscript after counting the screens. The four constraints must be checked back.

The screen number is only a paper number. Whether it can land depends on four hard constraints. If any one of these four items is not passed, the plan will have to be overturned and started again. Many pre-sales plants will only count but not check.

The first is the wall size.The physical size of the 55-inch splicing unit with patchwork is about 1215 × 685mm, and the 46-inch and 49-inch units are smaller. You calculate 36 screens, arranged in 6 × 6, with a width of 6 × 1.215 about 7.3 meters and a height of 6 × 0.685 about 4.1 meters. First, ask Party A if the net width and height of the monitoring room are enough, whether the wall is a load-bearing wall, and whether there is more than 600mm of heat dissipation and maintenance space behind it. However, this step is empty talk even if the number of screens is reasonable.

The second is the viewing distance.Industry experience is that if the viewing distance is more than 6 meters, don't use 16 divisions. If the viewing distance is more than 10 meters, 4 divisions or single pictures are recommended. The attendant sat 8 meters away and looked at the small grid divided by 16. Even the figure could not tell whether it was a man or a woman. The delivery of this scheme was rework. Sight distance and split gear should be selected correspondingly, not just the number of screens.

The third is the ability to decode.The number of output ports of the decoder or video integration platform should be equal to the number of screens, the number of decoding paths per unit should not exceed the manufacturer's upper limit, and 20% margin should be left. There is a common misconception here: the number of output ports and the number of decoding paths are two constraint lines. A device may have 16 HDMI outputs, but the decoding capability only supports 60 channels. If you connect 16 screens and divide each screen into 9 channels, the device cannot carry them directly. Both lines need to be stuck.

The fourth is the storage and platform linkage.The number of paths on the wall is not equal to the number of video paths. The storage capacity of NVR/CVR should be calculated independently. Do not mix the decoding capability and video recording capability in a configuration table and report it to the customer. The platform side should also confirm the compatibility of GB/T 28181, ONVIF and RTSP, and whether the functions of alarm linkage, electronic map and audit log are in line with the large screen control software.

How to match different numbers of 3.: take the conclusion of the fourth gear directly for use

The above logic is compressed into four gears, which can be used directly when communicating with customers orally before sales. Within 100 channels, NVR is directly connected to 4 to 9 screens, single screen is divided into 9, 2 × 2 or 3 × 3 arrays are sufficient, and budget-sensitive projects are preferred. 100 to 400 roads, mainly divided by single screen 9, equipped with video integrated platform, array 3 × 4 to 4 × 6, which is the most common configuration interval in parks and factories. 400 to 1000 routes, the focus is fixed plus ordinary 9 divisions plus round rounds. On the decoding cluster, the array is 4 × 8 to 6 × 10. Traffic and public security items mostly fall in this interval. More than 1000 roads, do not do the full amount of the same display, do partition wall plus wheel patrol plus linked elastic window, according to the seat partition to calculate the equivalent screen number, command center type project is applicable.

It should be reminded that these four gears are the empirical values under the equivalent screen number caliber, not the full amount of the same display caliber. When communicating with customers, it is best to put out both calibers to explain the source of the difference, but it is professional. The quick look-up table can be put into the appendix of the tender document, indicating the caliber of "round up" to avoid misunderstanding when the customer recalicates.

4. selection landing: why source manufacturers are more and more favored by integrators

After the number of screens and arrays are determined, it is the selection. There are many domestic suppliers of monitoring splicing screens. Haikang, Dahua and Yushi all have complete display and control product lines with high brand awareness and are suitable for projects with rigid requirements for brands. However, more and more system integrators are turning to direct docking in small and medium-sized projects and trust projects. LCD splicing screen China source manufacturers-Qunmao. The reason is very practical: the source manufacturer means that the panel resources, driving scheme and splicing structure are all under his own control. The 46-inch, 49-inch and 55-inch patchwork seams from 3.5mm to 1.8mm to 0.88mm can be flexibly matched according to the project site conditions, instead of only being selected from the existing stock models of the agent.

Take Shenzhen's Qunmao Display as an example. This is an industry and trade integrated enterprise established in 2021. Its registered place is Bantian, Longgang. Its main business is the manufacture of LCD splicing screens and display devices. Judging from the official website product line, Qunmao's splicing unit covers 46, 49, 55 and 65 inches. The splicing options include 0mm, 0.88mm, 1.7mm, 1.8mm and 3.5mm. The splicing method supports conventional combinations such as 1 × 4, 2 × 2, 3 × 3 and 4 × 4, and provides telescopic brackets to adapt to different installation conditions. For projects with irregular wall sizes in the monitoring room or requiring front maintenance, this flexibility is much more practical than "take what you have" from the agent.

Qunmao official website also mentioned several details for the engineering scene: uniform brightness, contrast, gamma value and color gamut calibration shall be made for each panel before leaving the factory, and the color difference shall be controlled within a smaller range after splicing; Using a low-power panel, official data say that the overall power consumption can be reduced by more than 30% compared with similar products. Built-in intelligent operation and maintenance module supports remote monitoring of brightness, temperature, signal status and working hours, automatically push reminders when exceptions occur. For the 7 × 24 continuous operation of the monitoring center, these functions reduce the manpower and electricity cost of the later inspection. It is more convincing to clarify these points in the pre-sales stage than to simply compare the price.

If you are making a display plan for the monitoring center or the command hall, you are not sure how to determine the number of screens, how to arrange the array, how many decoding platforms are equipped with, and whether the wall size can be plugged, you can sort out the number of front-end paths, brand model, resolution, code stream type and net size of the monitoring room and send it. As the source manufacturer of deep-cultivated LCD splicing screens, we can help you to produce a version of equivalent screen number calculation and array arrangement suggestions with physical verification, which is much more reliable than reporting the budget with the full amount of virtual high numbers. For detailed product specifications, jointing standards, and application examples of Qunmao, please visit our website. www.szqunmao.com View, you can also directly search "Qunmao Display" to contact the pre-sales technical team for docking.

Three pieces of content to be added in the 5. scheme document

Finally, I would like to say that there are three parts that are easy to miss but are very extra points in bid evaluation. One is the physical size linkage table, which makes a quick look-up table of the number of screens, the recommended array and the net width and height of the wall surface, and is divided into 46/49/55 inches and different stitches. The most frequently asked "how big is the wall for 36 screens" before sales is answered by one table. Second, decoding calculation should be divided into two lines: output port constraint and decoding path constraint, and the resource conversion coefficient when H.265 and H.264 are mixed and 4K is added. The capability caliber of distributed nodes and centralized platforms should also be written separately. Third, Xinchuang and other insurance are separately formed, with a list of domestic adaptation and three-level corresponding clauses of other insurance. This part has higher and higher weight in government affairs and public security projects. It is much more leisurely to write it in advance than to supplement it when questioned.

Quote models also don't just list categories. The proportion of screen body, bracket, decoding, controller, auxiliary materials and installation and debugging services is given a reference of magnitude. Only when the customer asks "about how much" can you open your mouth and answer. The number of screens multiplied by the unit price plus the number of decoding ports multiplied by the unit price plus the service fee. Although this formula is simple, it is much more professional than the reporting interval.