成功案例

Case of Wireless Transmission in Mine Online Monitoring System

Release time: 2025-06-02 13:49

I. Analysis of the Current Situation and Requirements of Mine Safety Construction

With the rapid development of China's national economy, the demand for energy in all industries is also increasing day by day. For the mining industry, which provides raw materials for the social industrial development, its social responsibility is becoming increasingly significant. Due to the special construction environment of mines, a large number of construction machinery is used during production operations. The safety protection and safety production of workers during construction have been unable to meet the requirements of the new situation with the previous safety management methods. How to manage these on-site monitoring images in real time while conducting production operations, how to detect safety situations in the first instance and make correct decisions in the first instance, and promptly carry out safety disposal, etc., have all become urgent problems. Therefore, an effective system for online monitoring and management is urgently needed.

In order to ensure the safety, stability and reliability of operations in the mining area, many enterprises have proposed installing video monitoring systems at the construction sites of mines, so as to quickly detect potential hazards and problems and solve them. With the continuous advancement of technology, the current local monitoring cannot meet the needs. It is necessary to transmit the images from all the front-end monitoring points to the unified back-end monitoring management platform in real time. The back-end management center establishes a monitoring center to monitor and supervise the relevant data, environmental parameters and images of each mine and mining area, so as to be able to understand and grasp the situation in real time and directly, and respond promptly to the situations that occur, in order to meet the development needs of modern society.


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II. Scheme Thinking and Design

In response to the specific requirements of wireless monitoring in mines, our company has proposed a complete wireless transmission solution. During the process of designing the solution, the following points were fully considered:

1. The feasibility and stability of the wireless transmission solution. In the design of the integrated solution, the fundamental prerequisite is the feasibility and stability of this solution. Without this as the foundation, everything else is useless. For the mining industry, in the special environment where it is inconvenient to set up wired networks in the field, our company has launched a digital wireless bridge as the transmission medium. According to the different applications and requirements of each point, different models of equipment are selected, combined with different antennas, so as to achieve the feasibility of communication for the entire communication link. Regarding the stability of the architecture, feasibility is the foundation, and stability is the key to the entire transmission process. The wireless bridges produced by our company have been well verified in previous engineering projects in terms of production processes and transmission performance.

2. The scalability of the overall wireless solution design. The success of a project implementation not only depends on whether the equipment can operate normally after it is set up at that time, but also on whether it can accommodate additional requirements from the client in the future and whether it has considered the subsequent needs of the users. This requires that during the initial solution design, the special circumstances that may arise during or after the implementation of the project should be taken into account. If equipment is added to the original solution without incurring excessive costs, it would be better. Therefore, in the design of this solution, we have provided the users with a large amount of redundancy to facilitate their addition of other monitoring points in the future.

3. Usability of equipment maintenance in the later stage. After the entire system is set up, problems are inevitable during the users' operation. Considering that the personnel at the user's site do not have high professional technical operation capabilities, during the initial system design, each part should be designed as simple, easy to use and stable as much as possible. Each component should be made as modular as possible to reduce the difficulty of operation and maintenance for the operators.

Based on the above considerations, the specific design of the plan is as follows. It is mainly divided into two parts:

Fixed transmission part and mobile transmission part;

The overall transmission topology is shown in the following figure:

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As can be seen from the above figure, the first part of this scheme is the fixed transmission section. Specifically, monitoring cameras are installed in the specific construction area at the front end. These cameras are connected to a wireless bridge, which then transmits the video signals from areas without 4G coverage to areas with 4G coverage either directly or indirectly. Finally, the received video signals are sent to the back-end comprehensive command center through 4G wireless equipment via the operator's network.

The second part is the mobile transmission section. Personnel in the front operation area can carry portable boxes. These boxes contain wireless receiving devices and 4G forwarding equipment, as well as batteries and displays. They can conveniently view and control nearby surveillance cameras. The portable boxes also provide local storage functionality and have the ability to forward the received video images to the back-end comprehensive command center. (Approximate illustration as follows).

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The fixed-point wireless transmission range is approximately 5 to 10 kilometers, while the transmission range of the mobile monitoring points is about 1 to 2 kilometers. If the suitcase is replaced with a directional antenna, the transmission distance can be further extended.

Relay point wireless coverage and point-to-point wireless transmission section:

For the base station relay point part, we have adopted our company's high-bandwidth multi-module wireless transmission product, model TQ-5000MS series. The specific model for the product that provides wireless coverage for the base station is TQ-5000MS-02H. The reason for using this equipment as the wireless coverage product is that this product is designed with a gigabit network interface and has a high data processing capability. The equipment itself supports a multi-module design and can install two modules. During the actual hotspot coverage process, if only a omnidirectional antenna is used, the gain is too small and cannot achieve a relatively long transmission distance. Therefore, in the scheme design and product selection, this equipment is used. In one device, two 60-degree antennas can be installed. At this base station, two devices can be installed to install four 60-degree antennas. Together, the coverage angle can reach more than 240 degrees, which can basically meet the requirements for connecting the surrounding front-end wireless devices. As shown in the following figure:


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Two units of this type of wireless equipment are installed on the tower. Each unit can accommodate two antennas, and the two units can collectively install four antennas, in order to achieve wireless coverage for the surrounding area.

The relay points also use outdoor distribution boxes to connect the wireless devices.

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Design features of the distribution box:

1. Adopting a hierarchical design structure, the layout is reasonable;

2. All adopt a front-mounted modular installation design, which is convenient for installation and later product maintenance;

3. Built-in heat-conducting fan, balancing the temperature between the interior of the cabinet and the outside environment. (The fan can be set to a temperature controller. It will start working only when the temperature reaches the set value. Once within the set threshold, the fan will stop working, saving energy);

4. Optional solar charging converter, which enhances the utilization rate of green energy in environments with sufficient sunlight;

5. Optional input of D-level lightning protection device to ensure the safety of equipment inside the cabinet in outdoor harsh environments;

6. The long-duration gel battery can provide a backup time of over 10 hours when the load power is around 100W;

7. Using a sine wave inverter power module, the system can freely switch between mains power and battery power modes, ensuring the continuity of power supply for the load;

8. The inverter power module has a wide voltage range compatible with the mains power supply (140 - 280V) and is connected in parallel with the input mains power, ensuring the safety of the power distribution system.

For point-to-point communication, the wireless equipment we recommend is our TQ-5000MS25. This device is equipped with a 25dBi directional gain antenna. Due to its high transmission power, the transmission distance can reach 10-15 kilometers. As a wireless transmission device between base stations, this equipment has many advantages. It has a built-in gigabit network interface, stable working performance, and the theoretical transmission bandwidth can reach 480 Mbps. The measured transmission bandwidth is up to 160 Mbps. This equipment has the characteristic of multi-level relay without loss, which can ensure a high bandwidth data even after multiple relays. The data loss during transmission is very small (the detailed parameters of the above two devices can be found in the product descriptions attached in the file). At the installation location of the base station equipment, the power supply method is the same as the front-end power supply method. Under normal circumstances, it is powered by AC 220V. If in some special situations, there is no city power supply, the above solar power supply system can also be adopted.

Point-to-point distance-free transmission is shown in the following figure:

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The distance between hotspots is quite far, so the TQ-5000MS25 is used for directional transmission to ensure that the monitoring data and images from the front end can be stably transmitted to the monitoring center.

The display, control and database access components of the backend monitoring center:

After the backend monitoring center receives the monitoring images from the front end through wireless devices, it receives the wireless signals transmitted from the relay point. Then, it forwards these signals via 4G wireless transmission equipment to the comprehensive command center over the public network. The command center displays them on large screens and conducts command and other operations.

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III. Utilizing Product Instructions

3.1.vidicon

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product feature:

● The highest resolution is 1920*1080.

● 1/3"Progressive Scan CMOS

● H.264/MJPEG video encoding, dual-stream, high video quality, high compression ratio

● Using an array of infrared lamps, the infrared projection range is 100 meters.

● Video analysis dimming technology, with better infrared night vision effect

● The center air-flow cooling technology has the advantages of excellent heat dissipation performance and high reliability.

● Colorful graphical menu, making operation and use more convenient

● The working power of the infrared lamp can be set separately through the menu, and it is related to the optical magnification.

● The menu allows for the actual detection of the voltage of the front-end power supply.

● The illuminance value of the installation environment can be detected through the menu.

● Supports the timing function, enabling the setting of 7 days with 7 time slots each day.

● Supports SD2.0 standard Micro SDHC memory card (optional)

● Support multiple regional privacy masking settings

● Support strategies such as motion detection and network failure detection, as well as alarm video recording and image capture.

● Embedded Web Server, supporting video browsing with IE, parameter configuration, upgrade, and user permission management.

● Support mobile monitoring

● Support ONVIF protocol


3.2.TQ5000MS Series

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TQ-5000MS-02H


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TQ-5000MS25


Product specification:    

This product, due to its powerful data processing capabilities and huge transmission bandwidth, is widely used in wireless transmission of point-to-point big data, as well as in long-distance wireless monitoring needs. It is widely applied in fields such as scenic spots, mining areas, islands, forest fire prevention, and marine aquaculture.


Predominant feature: 

● Operation mode: Supports AP mode, WDS mode, and ClientBridge + Repeater AP mode

● Supports IEEE 802.11 an mode, with transmission rates of 2TX (300Mbps) / 2RX (300Mbps)

● Supports up to 29dBm wireless output power

● Supports wide voltage input, with the voltage input range being DC12 to 24V.

● Supports load current protection mechanism. Built-in 4kV ESD (Electro Static Discharge) load and discharge lightning protection design. For use in domestic indoor areas or special balcony eaves in areas with frequent lightning strikes, simply connect the grounding wire properly to prevent damage caused by instantaneous lightning strikes.

● Supports 8 groups of Multiple-BSSID function, and also supports IAPP wireless roaming function

● Supports wireless IGMP v1/v2/v3 functions, capable of transmitting real-time audio and video packets over the network.

● Supporting WDS (Wireless Distribution Service) enables 8 bridge functions and also supports multiple Tag VLAN groups.

● The intelligent wireless distance parameters are automatically set. After inputting the distance, the system can automatically fine-tune the optimal corresponding advanced parameters to achieve the best wireless transmission rate effect for the corresponding distance.

● Supports QoS WMM (Quality of Service) bandwidth management and traffic control, and also supports IEEE 802.1p QoS standard for multicast and priority functions. Suitable for multimedia applications, it can set data priority based on the IP DSCP (Differentiated Services Code Point) field.

● Supports the IEEE 802.1d Spanning Tree extension tree function for wired and wireless interfaces. When multiple WDS wireless connections are utilized in conjunction with wired connections, it enables mutual backup between the wired and wireless networks, effectively preventing the abnormal problem of network Loop (infinite loop).

● Support SNMP v2c, SNMP v3 and SNMP Trap


Wireless Feature:

● Supports IEEE802.11an, with a maximum transmission rate of up to 300Mbps (Tx) and 300Mbps (Rx)

● Transmission power control is controllable. It can adjust the power level according to the environment and personal preferences.

● Support for channel selection: Manual setting or automatic setting

● Supports wireless base station scanning, which enables quick scanning of the surroundings to determine if there are any similar wireless devices nearby, facilitating the rapid deployment of the wireless network.

● Each group of SSIDs can support up to 32 connected users at most, and it supports a maximum of 7 groups of SSIDs (virtual APs).

● It has WDS (Wireless Distribution Service) and supports the function of 8-unit bridging.

● Supports DFS (Dynamic Frequency Selection), IEEE 802.1d - Multi-country roaming, etc. for specification certification/encryption (wireless security)

● It has the function of blocking users from discovering other users in a specific VLAN group, and distributing VLANs based on SSID.

● Supports data transmission encryption EAP-TLS + Dynamic WEP, EAP-TTLS + Dynamic WEP, PEAP/MSPEAP + Dynamic WEP, and also supports user authentication WPA-PSK/TKIP, WPA-802.1x/TKIP, 802.11i WPA2-PSK/CCMP/AES, WPA2 (802.1x / CCMP / AES)

● The support for hidden SSID prevents unauthorized users from attempting to access the wireless network.

● Support access control. The Access Control List (ACL) can be implemented using MAC and IP address filtering methods.