With the improvement of living standards, the importance of personal safety and the surrounding living environment are paid more and more attention, and the quality of property unit operation and supporting facilities is required to become increasingly high. But in recent years, with frequent elevator accidents such as trapped people and wounding occurred, the safety problem of elevator has become the focus of community and the media attention. The question that how to understand the fault information of the elevator at the first time (lift unit, floor, fault phenomenon etc.) plays a vital role in rescuing passengers in the elevator and elevator maintenance. From the national perspective, the degree of attention to elevator safety operation management and public security has increased year by year. It can be expected that mandatory standard of installing video surveillance in the national public places and property elevators is not a long period.
As the elevator is a moving object, the cable is easy to break. Traditional elevator video monitoring often uses the accompanying cable as the transmission channel, and uses the simulated and low resolution video camera which image quality is poor, the signal transmission attenuation is big and is easy to be affected by the electromagnetic interference. Due to the use of analog video, video content occupy a lot of space of hard disk storage, information is difficult to be searched and edited, system integration, scalability and compatibility are bad and construction wiring is difficult in well, so after a period of time, the elevator monitoring system has to be replaced, resulting in secondary construction, large amount of work, high cost, not easy maintenance and construction cycle is long.
Using the wireless transmission mode will not be limited by the factor of mobility, and is convenient to install and transport video easily, even if there is a barrier wall, within a short distance of the through wall can guarantee the stability bandwidth, simple installation, low cost and maintenance is simple too. At the same time, with the growing and changing requirements, devices connected by the elevator car and the dissemination of the contents are gradually increasing, the use of wireless devices can be very successful to meet the requirements of more and more extended functions.
Installed a pair of wireless transmission equipment at the top of the elevator shaft and the top of the car, the wireless device at the top of the elevator is connected to the monitoring center through the wired network, and the video data transmission in the elevator can be easily transferred to the monitoring center.
With the rapid development of the economy of our country, rural economic level increases, the quality of life of rural residents have greatly improved; demands for people’s own security are also getting stronger and stronger.
From the point of view of the present stage, security construction in rural area of China is still relatively backward and uneven development; most areas are almost blind security.
The people and the government all hope to establish a complete set of remote video surveillance system through modern technology in order to keep social order, crack down on various illegal and criminal activities, Protect citizens’ lives and property, promote the economic development, and it is also an important symbol of the modernization of the country.
The video surveillance system needs to cover major public occasions for reducing crime and enhancing security, it needs advanced technology, reliable quality, economical and practical, and convenient management.
Rural overall construction of security is backward, there are many defects of the traditional wired plan, such as sparsely populated, living scattered, fiber-optic wiring difficulties, high price and long construction cycle.
Using wireless transmission scheme is not subject to geographical factors and distance constraints, which is greatly reducing the local construction difficulty of rural poor infrastructure, the network mode is more flexible and expandable, convenient maintenance, shorten the construction period, and lower cost.
The requirement of rural surveillance is to understand the situation of the intersection of each village in real time. Monitoring center in the village. Each monitoring point to the village will be covered by trees or other buildings, so it is particularly important to choose a high ground. In general we choose the village near the base station as the commanding heights of the tower. A plurality of receiving devices are installed on the base station, covering 360 degrees, receiving the data of all the monitoring points around, and then transmitting the aggregated data from the base station to the village committee through the wireless transmission.
Monitoring equipment installation:
In the rural environment, the monitoring point is generally selected at the cross road, so the camera and wireless devices can be installed on the roadside poles. Use TB5E to send the monitoring data to the base station tower.TB5E can connect to two cameras.
Base station tower equipment installation：
Using 4 TB5F devices, can be achieved around 360 degrees of coverage. Use a pair of TB5HP-18I were set up in the base station tower and roof village as backhaul link.
The bandwidth of TB5HP-18I in the range of 5km is up to 200 ~ 400Mbps, which can satisfy the transmission of backbone links in most cases.
Village committee equipment installation:
TB5HP-18I receives data from the base station tower.
AP: TB5F; CPE: TB5E
The forest is the largest terrestrial ecosystem on the earth, and is an important part of the global biosphere. It is the gene pool, carbon storage, water reservoir and energy library which plays a vital role in maintaining the ecological balance of the earth, and is also the resources and the environment for human survival and development. How to carry out effective protection and utilization is our focus for many years, this is an important topic of hope to find solutions to solve various environmental problems.
Prevention of forest fire and illegal mining or poaching and protecting the ecological balance are important forest protection work. Setting up wireless monitoring system can strengthen the protection of forest management and monitor the forest real-time in key areas. The implementation of protective measures can timely and effectively stop the damage behavior of all kinds of illegal mining and poaching and other illegal acts and protect forest resources enormously. It can also provide support and security for forest workers and scientific investigation through the wireless monitoring.
The forest environment is special, wide range, with a vast territory, and is very inconvenient for the erection and maintenance of cable monitoring system. The complex terrain is not conducive to the laying of cable, it is very difficult to dig buried pipe while protecting vegetation, and it is not easy to maintain, and the wire loss are faster.
The use of modern wireless communication technology can send the front end of the real-time video image transmission to the monitoring center, and the monitoring center command back to the front end to carry out necessary reminders and scheduling in order to effectively control the fire, prevent illegal mining and poaching and maintain security. The remote wireless monitoring system can not only avoid the environmental and terrain problems, but also have a short construction period, wide coverage, low cost and easy maintenance; the system has very strong flexibility and scalability and you can adjust the installation position and increase the monitoring point at any time.
The main difficulty lies in forest monitoring, distances from the mountains are far away, power supply is difficult and it needs stable work in a variety of weather such as windy, lightning, rainy and foggy conditions. At the same time, when facing the different transmission distance and bandwidth requirements, you should use the most appropriate equipment to meet the conditions of a certain redundancy.
Schematic diagram of overall transmission:
The transmission topology between peaks is simple, and the transmission mode are generally using point to point mode in the case of long distance. Monitoring center is generally located on the edge of mountains or downtown near the mountains. So we need to collect the remote peak data gradually to the near one and then back to the monitoring center.
We choose different devices for transmission according to different distances and angles:
Less than 5km, within 90 degree, point to multipoint
Within 8km, point to point, we use a pair of TB5HP-18I [200Mbps, 5km]
10?15km, Point to point transmission, we use a pair of TB5HP-25I [200Mbps, 10km]
20?30km, Point to point transmission, we use a pair of TB5HD-29E [200Mbps, 20km]
Schematic diagram of monitoring center connection:
In recent years, China’s highway construction has achieved great success. By the end of 2015, the national highway mileage 125thousand km has reached. It is expected that the total mileage will exceed 200 thousand km by 2020. The corresponding expressway net video monitoring system as one of the core high speed highway electromechanical “three systems” also has made tremendous technological progress. The new freeway video network monitoring system has almost all digital, networked, digital video monitoring system integration. However, the traditional optical fiber and 3G transmission scheme is difficult to achieve the monitoring coverage due to the geographical and cost factors. The existence of blind area in a lot of places, monitoring for important areas and temporary operation are not in place and emergency treatment is not timely which bring difficulties to the remote command and often causing great economic losses.
The modern highway video surveillance system need to achieve full coverage, cost control and no blind spot monitoring, the use of a new generation of transmission technology with digital, networked, and command scheduling system can be effectively integrated with the existing command and dispatching system. Plug and play is supported on the monitoring of the new temporary area which is convenient to maintenance, can ensure the smooth running of the highway and accident can be treated in a timely manner.
The use of WLAN wireless transmission scheme greatly reduce the construction cost and supplies, and its convenient installation, good expansibility, without geographical constraints, only one input for life, the main transmission network can do more than 200Mbps at 10 kilometers, far to meet existing needs, and greatly saves the problem check and troubleshooting time through professional maintenance debugging tools, it has been greatly favored by the customers in the existing video surveillance.
a. Freeway monitor topology / full monitor
According to the linear characteristics of the highway, we can collect data at close range, and then transmitted them to the service area or optical access point.
In order to achieve coverage of railway section, we should set up a monitoring point every 1km. Repeater coverage range of 5 ~ 8km, so take service area / fiber access point as the center, covering about 15 ~ 20 km, about 40km length, basically reached the interval distance between each of the service areas.
Each monitoring point transmits data through the TB5E to repeater. TB5E has two fast Ethernet port, and it can take two cameras. you can connect them through a switch if there were more than two cameras.
Monitoring point equipment connection:
- One camera connection
- Multi camera connection
Every monitoring point usually contain multi camera on both sides of the highway, and it can be connected to TB5E through a switch. The video data is transmitted to a near distance convergent point by TB5E.
- Receive video data from each monitoring point by TB5E.
- Sending data from the convergence point to the convergence center by TB5HP-25I.
- Using device: Gigabit switches, TB5E, TB5HP-25I and cameras.
Transmit data from repeater to the service area or the optical fiber access point through TB5HP-25I.
b. Repair / maintenance / construction / accident and other temporary increasing accident
TB5E connect to 1 or 2 cameras, and transfer data to the nearest repeater point.
c. Service area monitoring and Internet service
Service area of each monitoring point device connection transmission diagram:
Service area entrance, exit, rest area and parking area and so on ground monitoring are used TB5E, it can send data to the top of the service area building.
Service area at the top of the tower and internal equipment diagram:
Service area at the top of the tower: on the one hand, we use TB5E to receive service area monitoring data; on the other hand, we use TB5HP-25I to receive the data from repeater.
At the same time we can use TB2I to surf the Internet in the service area and public area.
Wireless Internet Service in Service Area:
d. Road Monitoring Center
All the data in the highway is converged to the service area and then connected to the wide area network or the public security private network, road monitoring center can view the implementation of road conditions, publish scheduling information and so on through wide area network (WAN) or public security private network.
The gymnasium is a large number of people gathered in the area. With the popularity of mobile handheld WIFI devices, the demand for wireless networks is increasing in all kinds of activities. Wireless coverage also greatly meet the needs of a variety of activities. Through the whole wireless network coverage, mobile wireless inspection can be achieved, real-time information transmission of events in venues. The commercial input and output efficiency of the gymnasium has been greatly improved.
The staff at the entrance of the venue needs to be verified by the authenticity of the net. Provide quick check in, video surveillance and wireless office network. Need to carry out the wireless coverage of the venue, so as to achieve the wireless ticket inspection and office applications.
When erecting in the outdoor, the waterproof and dust proof high performance AP is installed to realize the wireless coverage application. In the indoor installation, the installation of covering a wide range of AP on the ceiling of the venues in AP have dual port for surveillance camera access. All AP connected to the host room through the switch.
AP: TB5F; CPE: TB5E
With the more and more standardized management of modern enterprises, the monitoring of the plant has become a standard. Factory has a wide range, large scale characteristics. The production and management department requires high safety factor. In a large number of production workshops, outdoor places and functional departments to achieve the combination of on-site monitoring and production command, which will greatly improve the level of intelligent management of the plant.
Most of the plant construction period is relatively early. Network communications network planning is relatively inadequate, it cannot be spread to every corner, and even at the monitoring point will always move. Wired data transmission mode is sure to need buried pipes and wiring, will damage the plant landscape, and the construction itself there is a certain difficulty.
Wireless communication does not have to be limited by geographical factors. It is able to achieve a full range of monitoring of all roads, factories, factories and warehouses. A temporary point or increase point in demand is also very easy to complete. For the monitoring of different departments can also set different permissions. In general, wireless network technology has the advantages of simple construction, good scalability and flexibility, easy maintenance and low cost.
Plant monitoring is generally required for the main road, the entrance, parking, workshop, warehouse and other areas around the area for real-time view.
Monitoring room is generally located in the security room which is at the edge of the plant and the location is not high. Monitoring rooms and other monitoring points are usually not visible. We generally choose a relatively high building to do the relay point. The data of the monitoring points is then transmitted to the control room by the relay point.
Ground monitoring point:
Cameras and wireless devices can be mounted on a street lamp pole or a house. Select TB5E as the transmission equipment in the plant area.
Warehouse monitoring point:
Install TB5E device at the top of the warehouse and install the camera in the warehouse.
Relay point installation:
Using TB5F device, can be achieved coverage. Use a pair of TB5HP-18I were set up in the building and security room as backhaul link.� The bandwidth of TB5HP-18I in the range of 5km is up to 200 ~ 400Mbps, which can satisfy the transmission of backbone links in most cases.
Security room point:
A TB5E receiver monitoring point video data. A TB5HP-18I to receive the data sent by the relay point.
The application of wireless security video surveillance in factory and warehouse
AP: TB5F; CPE: TB5E