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As a person in charge of an engineering project, what we should care about is not how expensive the equipment is, but whether the equipment meets the needs of the project and whether that equipment is what we want.
This article is to help people solve this annoyance, from the many conditions to filter out the wireless bridge we want, to help us build a professional, practical, reliable wireless monitoring system.
So, let's start with the first condition.
First, the wireless bridge performance <br> <br> first step in the selection of a wireless bridge, we first of all want their own needs, our projects are big, we need to monitor the number of points, from the need to transfer How far, what kind of data type need to be transmitted, how large is the amount of data to be transmitted, whether WIFI signal coverage needs to be done, etc. These problems determine which type of wireless bridge we need to find.
Therefore, we must consider the wireless bridge's transmission distance, transmission bandwidth, supported data types, and whether it supports WIFI signal coverage conditions. 
Example â‘ , there is a wireless monitoring project to transfer two kilometers, there are three monitoring points, the transmission rate requirements over 100Mbps, data transmission is digital data network, WIFI coverage do not, then we can can use this ST5817H Wireless bridge.
The wireless bridge to transfer data type for the network digital signal transmission distance up to 3 km, supports multipoint transmission, so there are three monitoring points have no problem, the transmission bandwidth of up to 300Mbps.
These data fully meet the above conditions, of course, there are many other wireless bridges are in line with this requirement, not to list here, so this is only one condition does not allow the user to select the ultimate goal.
Second, the microwave signal channel <br> <br> look at the performance of wireless bridge can not determine the quality of a wireless bridge, the second filter may further refine the condition of choice all, we need to further refine the device.
Just as in Example 1, except that the ST5817H can be satisfied, there are many devices on the network that can satisfy the conditions of Example 1, and the price can even be much cheaper than this wireless bridge.
Well, we want to increase the selection of projects, such as the microwave signal channel of wireless bridges.
As everyone knows, wireless bridges are devices that use microwave signals to communicate wirelessly. There are two common 2.4GHz and 5.8GHz wireless bridge work channels on the market. 
Due to the rapid development of wireless technology in recent years, and various microwave signals can be monitored throughout the country, it is necessary to pay attention to the issue of whether there is interference from the same frequency before using wireless bridges.
The so-called co-channel interference means that microwaves using the same frequency will interfere with each other. Therefore, to avoid co-channel interference, it is necessary to select channels of microwave signals that occupy less channels.
If the local use of 5.8GHz is more, it is recommended to use 2.4GHz equipment, and vice versa, use 5.8GHz equipment.
Third, after stability <br> <br> plus the option of microwave signal channels, it might screen a large number of devices, right? However, this is not the end point. We must also examine the stability of a wireless bridge.
A lot of wireless bridges on a certain treasure can give specific wireless bridge performance and work channels, for example, how far this wireless bridge can transmit, how much transmission bandwidth can be reached, and microwave channels with 2.4 GHz/5.8 GHz. Signals, etc., have specific numerical data, but stability cannot be guaranteed.
After all, when it comes to practical applications, wireless bridges will encounter a lot of field problems. The most obvious is that the test in the factory is just fine. When it comes to the site, there are various problems of packet loss, delay, drop, and restart. This kind of stability Sex is really daunting.
There are usually 3 aspects that affect the stability of wireless bridges: 
1, wireless bridge hardware:
If the chip, motherboard, or overall workmanship used by the device is not good, it will be easy to come into contact with other devices when it comes to the site, or if the work time is long, various kinds of failures will occur. This is how good the technical staff are. The fundamental problem that cannot be solved. Therefore, we must choose a wireless bridge that has enough hardware.
2. External environment:
In the second condition, it was also mentioned that regarding the interference problem, in addition to the same frequency interference, many electric and magnetic fields and other factors may be encountered in the actual application environment. In addition, in storms, high temperatures, low temperatures and other environments will seriously affect the normal work of wireless bridges, non-industrial wireless bridges are often subject to such environmental impact, causing all kinds of abnormal conditions. If it is used in harsh field environment, the industrial-grade wireless bridge is the best choice.
3, the technical staff operation:
Wireless bridge installation and commissioning are very professional tasks. The technical personnel responsible for commissioning and installing are not technically hard and are easily affected by the external environment. They are unable to display the performance of the equipment in various situations. If the project is more complex, choosing a brand with a strong technical team can effectively ensure the successful completion of the project.
Fourth, the application environment Now wireless monitoring, wireless microwave transmission technology has been widely used in construction sites, highways, railways, tunnels, cities, residential communities, forest fire prevention, breeding bases, farms, entertainment venues, stadiums, campus, driving school , Parks, oilfields, oceans, lakes, rivers, islands, factories, warehouses, power stations, nature reserves, etc. are all used in environmental security monitoring projects. 
In these environments, some of the monitoring and wireless bridge equipment are installed indoors, and some are installed outdoors. Selecting the applicable equipment is the key depending on the environment.
Wireless bridges working indoors can have low waterproof and dustproof performance, but their anti-jamming capability must be strong. After all, there are many electrical appliances or WIFI signals indoors, which can easily cause interference.
In the outdoors, it is vulnerable to the effects of high temperature, low temperature, storm, haze, thunderstorms, etc. Therefore, it is necessary to pay attention to the factors such as waterproof, dustproof, lightning protection, high and low temperature resistance, etc., and select industrial grade wireless networks that require strict requirements. The bridge is more appropriate.
In addition, in the initial design, we must also consider the connection mode of the transmission. Pay attention to the transmission modes of point-to-point, point-to-multipoint, and transit. Select appropriate equipment according to the distance of the transmission, the number of points, the distribution, and the terrain of the environment. .
Example 2 Here, there is a monitoring point of 8, each 4 monitoring points are a group, the distribution is close, the monitoring point to the monitoring room distance of 20 km wireless monitoring project, the application of the environment in the forest, the transmission rate requirements About 100Mbps.
Here, we propose to integrate the eight monitoring points in front of each other. First, use a high-power wireless bridge ST58T8G to do 1 to 4, integrate the two monitoring points into the switch, and then use the long-distance wireless bridge ST5801GB to do point-to-point remote communication. Wireless transmission, transmission of monitoring video data to a monitoring room 20 kilometers away. In this way, this remote wireless monitoring project can be completed with the minimum number of devices.
Both wireless bridge devices are industrial-grade wireless bridges and are suitable for use in wild environments such as forests and mountains.
Fifth, the company's brand <br> <br> do wireless control engineering, wireless transmission projects, not just to buy but also to buy goods and services. As a professional wireless bridge provider, it should provide high-quality equipment while also providing customers with professional technical services. So, how to judge whether a brand enterprise is reliable? 
We can start from the following 5 points to find a reliable brand enterprise.
1. The company's age The longer the company's brand is established, the richer and more mature the technology, experience and services accumulated by the company's brand. In addition, a company with a long operating time is always better than a company that hasn't been established for a long time. Users do not need to worry about the sudden closure of the supplier of the equipment or even lost contact with the equipment.
For example, Tengyuan Zhituo, with 10 years of experience in R&D and application of wireless bridges and wireless monitoring systems, is a high-tech enterprise. We have provided professional equipment and solutions for many places across the country and abroad, and we have a mature set of wireless monitoring solution design service processes that can provide customers with a sense of security.
If it is deemed necessary, it may also go to the website of China Industry and Commerce to inquire about the company's establishment time, registered capital, etc. The longer the company is established, the more the registered capital is more secure.
2. Qualification Qualifications, including the company's qualifications and product qualifications, such as enjoying 3C certification, radio transmission equipment type approval certificate, ISO9001 quality management system certification, computer software copyright registration certificate, high-tech enterprise certification and various patent certificates, etc. .
The more qualifications with gold content, the better the quality of the company or equipment, and the person responsible for engineering should choose the kind of quality-assured companies and equipment.
3. Pre-sale and after-sales service A company's pre-sales and after-sales service can directly reflect the overall strength of a company. A professional and excellent brand enterprise can always provide customers with a very high-quality service experience from the initial stage of customer contact. From the consultation to the design of the plan to the preparation and transportation of the goods, from the installation and commissioning of the equipment to the after-sales service, the user can experience professional, smooth and convenient services.
In the initial stage of cooperation, customers could not know how well the company's after-sales service was done, but at least some of the clues can be seen from pre-sale services.
Non-quality company's response to customers is always slow and immature. Good brand companies respond to customers with agility and maturity, guide customers to explain the project step by step, and quickly design solutions for customers. Every customer of Tengyuan Zhituo has received special technical training and can analyze various complicated wireless monitoring environments. As long as the customers describe the needs and conditions, they can make a perfect situation for the situation in a short time. The plan feeds back to the customer.
The technical team has already mentioned the importance of the technical team in the third point on the stability.
Having a large technical team can handle a wide variety of on-site problems in a complex and complex situation. After all, wireless surveillance systems must not only provide high-quality, high-stability equipment, but also provide thoughtful wireless solutions and technical support. For example, Tengyuan Zhituo’s technical team has long been active in the forefront of wireless monitoring projects and has a lot of practical experience. From the snow-covered plateau at an altitude of 5,000 meters to the underground caverns of 800 meters below the ground, dusty construction sites, boundless oceans, uninhabited jungles, etc., they are everywhere as long as customers need them.
5. Successful cases In fact, successful cases are data that can easily reflect the experience of a company's company. To watch a company's wireless monitoring success stories, we can learn from the number, types, complexity, equipment used, transmission distance, and transmission bandwidth of successful cases. The starting point is the number and type of successful cases, and the complexity of the project environment, which directly reflects the strength of the company's strength.
For example, there are more than 1,000 successful cases owned by Tengyuan Zhituo from construction sites, expressways, railways, tunnels, cities, residential communities, forest fire prevention, breeding bases, farms, gymnasiums, campuses, driving schools, parks, oilfields, and oceans. Lakes, rivers, islands, factories, warehouses, power stations, nature reserves and many other environments are all involved. Not only shows that the company's experience is rich, but also shows that the company is trusted by the market.
To sum up, we can choose from two major aspects for the selection of long-distance wireless bridges for engineering purposes: equipment and enterprises. Then expand to the device's performance, work channel, stability, application environment and the company's overall strength. From the one-loop to the next-loop screening, we have finally obtained the brand and equipment we have in mind, helping us to complete the construction of the project.
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Wireless monitoring engineering special high-power wireless bridge selection method
Which brand and wireless bridge is better for the wireless monitoring system in the project? When asked this question, what is the answer that comes to mind? And is that answer the most ideal? I think most people are afraid to make a positive answer.