阅读说明：本技术 一种隧道环境监测数据无线接力传输系统 (Wireless relay transmission system for tunnel environment monitoring data ) 是由 赵宇 全斐 赵春杰 沈家君 高明成 赵勇 周杨 毕文胜 徐小刚 于 2019-09-27 设计创作，主要内容包括：本发明涉及一种隧道环境监测数据无线接力传输系统,包括：环境监测数据采集终端、串口服务器、无线网桥、信号转弯传输装置、计算机和/或控制器；所述的环境监测数据采集终端布署在隧道中相应的断面上、采用RS485双绞线与其相应断面上所布署的串口服务器连接；所述的无线网桥由无线信号主站、无线信号从站两两一组对应组成,在转弯处或者上下沉路段设置信号转弯传输装置；计算机和/或控制器布署在隧道的终点处。本发明弥补了线缆传输移动不方便、易破损、故障率高、故障排除难度大等缺陷；解决了斜井及横洞的长大隧道、小半径隧道转弯处易出现无线数据信号中断的问题；设备简单、故障率低、安装方便、操作简单、成本低廉,实用性强。(The invention relates to a wireless relay transmission system for tunnel environment monitoring data, which comprises: the system comprises an environment monitoring data acquisition terminal, a serial server, a wireless network bridge, a signal turning transmission device, a computer and/or a controller; the environment monitoring data acquisition terminal is deployed on a corresponding section in the tunnel and is connected with a serial server deployed on the corresponding section by an RS485 twisted pair; the wireless bridge is formed by correspondingly combining a wireless signal master station and a wireless signal slave station in pairs, and a signal turning transmission device is arranged at a turning position or an up-down sinking road section; the computer and/or controller is deployed at an endpoint of the tunnel. The invention makes up the defects of inconvenient cable transmission and movement, easy damage, high failure rate, large difficulty in failure removal and the like; the problem that wireless data signal interruption is easy to occur at the turning positions of long and large tunnels and small-radius tunnels of inclined shafts and transverse holes is solved; the device is simple, the failure rate is low, the installation is convenient, the operation is simple, the cost is low, and the practicability is strong.)

1. A wireless relay transmission system for tunnel environment monitoring data comprises: the system comprises an environment monitoring data acquisition terminal, a serial server, a wireless network bridge, a signal turning transmission device, a computer and/or a controller; the environment monitoring data acquisition terminal is deployed on a corresponding section in the tunnel and is connected with a serial server deployed on the corresponding section by an RS485 twisted pair; the method is characterized in that:

the wireless network bridge is formed by correspondingly combining a wireless signal master station and a wireless signal slave station in pairs, and the wireless signal master station and the wireless signal slave station of the same wireless network bridge are on the same parallel line to form a straight line; if a turning or up-down sinking road section exists between the wireless signal master station and the wireless signal slave station of the same wireless bridge, a signal turning transmission device is arranged at the turning or up-down sinking road section;

the number of the wireless bridges is adapted to the length of the tunnel, and a wireless signal master station of a first wireless bridge is arranged on a first section; a switch is arranged between the wireless signal slave station of the first wireless bridge and the wireless signal master station of the second wireless bridge, and the three are connected and arranged on the second section through network cables; the deployment is carried out by analogy in the following sequence, and the wireless signal of the last wireless bridge is deployed at the end point of the tunnel from the station;

connecting a serial server deployed on a first section with a wireless signal master station of a first wireless network bridge through a network cable, and connecting a serial server deployed on a later section with a corresponding switch through the network cable to form an Ethernet connection mode;

the computer and/or the controller are deployed at the end point of the tunnel, the wireless signal slave station of the last wireless bridge at the end point is connected with the serial server deployed at the end point through a network cable, and the serial server at the end point is connected with the computer through the network cable and connected with the controller through an RS485 twisted pair.

2. The wireless relay transmission system according to claim 1, wherein the signal turning transmission device is formed by connecting a wireless signal turning slave station and a wireless signal turning master station via a network cable, the wireless signal turning slave station and the wireless signal turning master station are located on a same parallel line to form a straight line, and the wireless signal turning master station and the wireless signal turning slave station are located on a same parallel line to form a straight line.

3. The wireless relay transmission system according to claim 2, wherein a plurality of measuring points are arranged at different positions of the same section of the tunnel, and a plurality of environment monitoring data acquisition terminals are deployed at each measuring point.

4. The wireless relay transmission system according to claim 3, wherein the environmental monitoring data collection terminal is a harmful gas monitoring sensor.

5. The wireless relay transmission system according to claim 4, wherein a plurality of harmful gas monitoring sensors at the same measuring point on the same section are connected in series by a hand-in-hand manner using an RS485 twisted pair, and finally, the collection of the monitoring data at the measuring point is realized through a 485 module.

6. The wireless relay transmission system according to any of claims 1-5, wherein signals between the primary and secondary wireless signal stations of the same wireless bridge are transmitted over a 5.8G frequency band wifi.

7. The wireless relay transmission system according to claim 6, wherein the serial server is configured to implement data conversion transmission between RS485 and ethernet; the controller is realized by adopting a programmable controller, and alarm threshold values of relevant environment data are stored in advance; the computer stores alarm threshold values of related environment data in advance.

Technical Field

The invention belongs to the technical field of tunnel environment monitoring, and particularly relates to a wireless relay transmission system for tunnel environment monitoring data, which is particularly suitable for wireless transmission of tunnel harmful gas monitoring data.

Background

Along with the construction of tunnels and underground projects, a large number of geological disasters such as collapse, water burst, gas explosion and the like follow up, and great difficulty is brought to the construction and operation of the tunnels and the underground projects. In recent years, with the increasing number of tunnel and underground engineering in remote mountainous areas with complex geology, various and high-concentration harmful gases, toxic harmful gas, prominent high-pressure gas and the like appear in some non-coal strata, great threat and challenge are brought to the construction and operation of the tunnel and the underground engineering, the prevention of the toxic harmful gas is one of important links of the safety control of the harmful gas tunnel and the underground engineering, and the tunnel environment monitoring, particularly the harmful gas monitoring, is the most intuitive means for grasping the gas concentration change in the construction.

At present, two modes of manual monitoring and automatic monitoring are mainly adopted for monitoring the environment of the tunnel and the underground engineering, the data change in the operation environment of the tunnel, particularly the change of the concentration of harmful gas, is monitored in real time, the risk evaluation is carried out, and the construction and operation safety of the tunnel and the underground engineering is ensured by taking targeted measures. The existing tunnel environment automatic monitoring mostly adopts a sensor to collect environmental data, particularly change data of harmful gas concentration, and transmits the environmental data to a command center for displaying, recording and data processing. Within the tunnel, conventional means may employ cables to transmit data. However, in the data transmission of the tunnel working environment, the cable transmission has the following problems: firstly, the length of a transmission cable needs to be lengthened according to the tunneling length, the number of cable joints is increased, and the fault risk rate is high; secondly, during tunnel blasting operation, a sensor near an operation surface needs to move according to construction requirements, and the movement flexibility of the sensor is influenced by the existence of a cable; thirdly, the tunnel construction period is long, the construction environment is poor, and the damage of the cable caused by the construction is inevitable; fourthly, for tunnels with flammable and explosive gases such as gas, the dangerousness of cable transmission is high, the transmission cables need to meet relevant regulations of coal mines, and the cost is high.

The wireless data transmission system is adopted in the tunnel, so that the problems in cable transmission can be well solved. However, because the length of part of the tunnel is long, and the operating environment of the tunnel is limited, the problem of wireless data signal interruption is easy to occur at the turning positions of long tunnels and small-radius tunnels containing inclined shafts and transverse holes. Therefore, a set of stable and reliable information relay transmission system is needed for wireless transmission of tunnel environment monitoring data.

Disclosure of Invention

The invention mainly aims at the defects of the prior art of tunnel environment monitoring data transmission, and provides a wireless relay transmission system of tunnel environment monitoring data, which is mainly applied to automatic monitoring and early warning management of harmful gas and air quality during tunnel construction and operation. The technical scheme adopted by the invention is as follows:

a wireless relay transmission system for tunnel environment monitoring data comprises: the system comprises an environment monitoring data acquisition terminal (such as a sensor), a serial server, a wireless bridge, a signal turning transmission device, a computer and/or a controller; the environment monitoring data acquisition terminal is deployed on a corresponding section in the tunnel and is connected with a serial server deployed on the corresponding section by an RS485 twisted pair;

the wireless bridge is formed by correspondingly combining a wireless signal master station and a wireless signal slave station in pairs, the wireless signal master station and the wireless signal slave station of the same wireless bridge transmit data in a wireless communication mode, and the wireless signal master station and the wireless signal slave station of the same wireless bridge are on the same parallel line to form a straight line, so that the dislocation of an upper corner, a lower corner and a corner is avoided; if a turning or up-sinking road section exists between the wireless signal master station and the wireless signal slave station of the same wireless bridge, a signal turning transmission device is arranged at the turning or up-sinking road section and is used for adjusting the transmission direction of the wireless signals and completing turning;

the number of the wireless bridges is adapted to the length of the tunnel, and a wireless signal master station of a first wireless bridge is arranged on a first section; a switch is arranged between the wireless signal slave station of the first wireless bridge and the wireless signal master station of the second wireless bridge, and the three are connected and arranged on the second section through network cables; the deployment is carried out by analogy in the following sequence, and the wireless signal of the last wireless bridge is deployed at the end point of the tunnel from the station;

connecting a serial server deployed on a first section with a wireless signal master station of a first wireless network bridge through a network cable, and connecting a serial server deployed on a later section with a corresponding switch through the network cable to form an Ethernet connection mode;

the computer and/or the controller are deployed at the end point of the tunnel, the wireless signal slave station of the last wireless bridge at the end point is connected with the serial server deployed at the end point through a network cable, and the serial server at the end point is connected with the computer through the network cable and connected with the controller through an RS485 twisted pair.

Before tunnel construction, the system is used for detecting the operating environment data in the tunnel, particularly the concentration condition of harmful gas, and under the condition of ensuring the safety of the operating environment, workers and machines are organized to carry out tunnel operation construction. When the concentration of harmful gas is found to exceed the standard in construction, the harmful gas sensor in the tunnel and the computer and/or the controller of the out-of-hole commanding center at the end point of the tunnel send out sound and light alarm signals simultaneously, and after the alarm information is received, workers in the tunnel are immediately organized to evacuate. And specific measures are made according to the change conditions of the types and the concentrations of the harmful gases displayed by the controller of the command center, after the measures are implemented, the system detects that the concentration of the harmful gases in the operating environment in the tunnel is within a safety limit range, and the construction is resumed after the safety of the operating environment is ensured.

Preferably, the signal turning transmission device is formed by connecting a wireless signal turning slave station and a wireless signal turning master station through a network cable, the wireless signal turning slave station and the wireless signal master station at the turning position are positioned on the same parallel line to form a straight line, and the wireless signal turning master station and the wireless signal slave station at the turning position are positioned on the same parallel line to form a straight line.

Preferably, a plurality of measuring points are arranged at different parts of the same section of the tunnel, and a plurality of environment monitoring data acquisition terminals are arranged at each measuring point; the environment monitoring data acquisition terminal is a harmful gas monitoring sensor; a plurality of harmful gas monitoring sensors with the same measuring point on the same section are connected in series by a hand-in-hand mode through an RS485 twisted pair, and finally, the monitoring data of the measuring point are collected through a 485 module. And (3) connecting the 485 modules of each measuring point in series by adopting an RS485 twisted pair to finish data acquisition of the section. The data of the previous section and the data of the next section are transmitted by the wireless network bridge connection, the data of the next section comprises the data information of the previous section and the data information of the current section, and the data are sequentially accumulated and relayed by the wireless network bridge to be transmitted to the tunnel portal at the end point of the tunnel.

Preferably, signals between the wireless signal master station and the wireless signal slave station of the same wireless network bridge are transmitted in a wifi frequency band of 5.8G, the theoretical maximum value is 5km, the height difference is limited under the test condition, and the actual measurement is 1.7 km.

If the signal from the station of the wireless signal of the last bridge only enters the computer, the wireless signal is accessed into the computer through the network cable by using a self-contained LAN port, and the data can be read by using software; if the data does not enter the computer, a serial server is added to convert the network signal into an RS485 signal to access the controller.

The invention has the following advantages:

1. the invention has simple principle, and well solves the problems of various harmful gases in the limited space of the tunnel, multi-section monitoring data and long-distance transmission; the wireless transmission overcomes the defects of inconvenient cable transmission and movement, easy damage, high failure rate, high failure removal difficulty and the like; the problem of the inclined shaft and the big tunnel of cross bore, the wireless data signal interruption easily appears in the small diameter tunnel turning department is solved.

2. The invention is not only suitable for the transmission of the harmful gas monitoring data in the tunnel, but also suitable for the transmission of the monitoring data in other underground engineering and limited space.

3. The system can realize the integrated transmission of a plurality of monitoring breakpoints and batch monitoring data.

4. The system has the advantages of simple equipment, low failure rate, convenience in installation, simplicity in operation, low cost and strong practicability, and is suitable for large-scale popularization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are specific embodiments of the invention, and that other drawings within the scope of the present application can be obtained by those skilled in the art without inventive effort.

FIG. 1 is a schematic diagram of the connection of multiple harmful gas detection sensors at the same measuring point in a tunnel;

FIG. 2 is a schematic view showing the connection of a plurality of harmful gas detection sensors at different monitoring points on the same section of a tunnel;

FIG. 3 is a schematic diagram of the overall structure of a wireless relay transmission system for monitoring harmful gas in a tunnel environment;

FIG. 4 is a schematic diagram of a signal turn transmission device at a tunnel turn;

in the figure, 1-a first harmful gas detection sensor, 2-a second harmful gas detection sensor 2, 3-RS 485 twisted pair, 11-a harmful gas detection sensor at a station 1, 12-an RS485 twisted pair at a station 1, 13-a 485 module at a station 2, 14-a 485 module at a station 5, 15-a 485 module at a station 4, 16-a 485 module at a station 3, 21-a first serial server, 22-a first network, 23-A master station, 24-B slave station, 25-a second network, 26-a switch, 27-a third network, 28-C master station, 29-a second serial server, 30-a fourth network, 31-D slave station, 32-a fifth network, 33-E master station, 34-F slave station, 35-a sixth network, 36-a third serial server, 37-RS 485 twisted pair, 38-a controller, 39-a seventh network, 40-a computer, 41-G, 42-I turn slave station, 43-eighth network cable, 44-J turning master station, 45-H slave station.

Detailed Description

The invention will now be further described with reference to the accompanying drawings and non-limiting examples. The embodiment of the invention is described by taking the wireless transmission of the monitoring data of the harmful gas in the tunnel as an example.

Fig. 1 is a schematic connection diagram of a plurality of harmful gas detection sensors at the same measurement point in a tunnel. Adopt RS485 twisted pair 3 to establish ties with hand-in-hand mode between first harmful gas detection sensor 1 and the second harmful gas detection sensor 2, the quantity of harmful gas detection sensor correspondingly increases as required, extends the connection in proper order according to above-mentioned connected mode.

Fig. 2 is a schematic view showing the connection of a plurality of harmful gas detection sensors at different monitoring points on the same section of a tunnel. In the embodiment of the invention, 5 monitoring points are arranged on the same section of a tunnel as an example, and the connection mode between the monitoring points and between the harmful gas detection sensors is described. A plurality of harmful gas detection sensors 11 of a measuring point 1 are connected in series by hands in a manner shown in figure 1 by adopting a plurality of RS485 twisted pairs 12, and the last harmful gas detection sensor 11 is connected to a 485 module 13 at the position of the measuring point 2 by adopting the RS485 twisted pair. A plurality of harmful gas detection sensors of the measuring point 5 are connected in series by RS485 twisted pairs and hands in a manner shown in figure 1, and are connected into a 485 module 14 of the measuring point 5; the 485 module 14 at the measuring point 5 is connected with the first harmful gas detection sensor at the measuring point 4 by an RS485 twisted pair. Similarly, a plurality of harmful gas detection sensors of the measuring point 4 are connected in series and connected to the 485 module 15 of the measuring point 4, and the 485 module 15 at the position of the measuring point 4 is connected with the first harmful gas detection sensor of the measuring point 3 by an RS485 twisted pair; a plurality of harmful gas detection sensors of the measuring point 3 are connected in series and connected into the 485 module 16 of the measuring point 3, and the 485 module 16 at the position of the measuring point 3 is connected with the first harmful gas detection sensor of the measuring point 2 by an RS485 twisted pair. A plurality of harmful gas detection sensors of the measuring point 2 are connected in series by RS485 twisted pairs and hands in a hand-pulling manner as shown in figure 1, and are connected into a 485 module 13 of the measuring point 2. Therefore, the data of the harmful gas detected by all the harmful gas detection sensors of the 5 monitoring points are transmitted to the 485 module 13 of the measuring point 2 through the 485 module and the RS485 twisted pair line.

Fig. 3 is a schematic diagram of the overall structure of a wireless relay transmission system for monitoring harmful gas in a tunnel environment. The embodiment of the invention takes 2 sections in a tunnel as an example to explain the structure and the connection mode of the wireless relay transmission system. After the measuring points of the section 1 and the section 2 in the tunnel are connected according to the method shown in fig. 2, the 485 module which collects all monitoring data of the section is respectively connected to the first serial server 21 and the second serial server 29. The first serial server 21 is connected with the A master station 23 through a first network cable 22; after receiving the wireless signal transmitted by the a master station 23, the B slave station 24 accesses the switch 26 through the second network cable 25; the second serial server 29 is connected to the switch 26 through a fourth network cable 30; the switch 26 is connected with the C main station 28 by a third network cable 27; after receiving the wireless signal transmitted by the master station 28C, the slave station 31 is accessed to the master station E33 through the fifth network cable 32, and the master station E33 transmits an enhanced signal to realize relay; after receiving the wireless signal transmitted by the E master station 33, the last F slave station 34 accesses a third serial server 36 through a sixth network cable 35, and the third serial server 36 is connected with the controller 38 by using an RS485 twisted pair 37; if the signal needs to enter the computer, the serial server 36 is connected with the computer 40 by a seventh network cable 39. The master station and the slave station are used in a group, and particularly how many groups of master stations/slave stations need to be deployed in a tunnel depends on the length of the tunnel and the wireless transmission distance of the master stations/slave stations.

In the embodiment of the invention, the serial server is used for realizing data conversion and transmission between the RS485 and the Ethernet. The controller can be realized by adopting a programmable controller, an alarm threshold value of related environmental data is stored in advance, the collected data is compared with the data of the alarm threshold value, and an alarm prompt is given when the collected data exceeds the threshold value. The computer stores the alarm threshold value of the related environmental data in advance, compares the collected data with the data of the alarm threshold value, and gives an alarm when the collected data exceeds the threshold value.

In the embodiment of the present invention, the controller and the computer are only used for realizing simple data storage, comparison or display, and do not relate to improvement in program, and therefore, the detailed description is omitted.

The tunnel or the small curve tunnel of the auxiliary tunnel such as the inclined shaft, the transverse hole and the like is arranged, and the corner splicing is needed to be arranged at the turning position to realize the signal relay. Fig. 4 is a schematic structural diagram of a signal turn transmission device at a tunnel turn. In the figure, it is assumed that the G master station 41 and the H slave station 45 are a group of wireless bridges, and because the positions deployed in the tunnel between the G master station 41 and the H slave station meet turning points or upper and lower sinking sections to form shielding, and the straight line transmission of signals cannot be completed, it is necessary to deploy the I-turn slave station 42 and the J-turn master station 44 at the turning points or the upper and lower sinking sections, and the I-turn slave station 42 and the G master station 41, and the J-turn master station and the H slave station 45 are located on the same parallel line to form a straight; the I-turn slave station 42 and the J-turn master station 44 are connected by an eighth network cable 43, and are used for adjusting the transmission direction of the wireless signals, and after turning is completed, the J-turn master station 44 transmits the wireless signals to the H-slave station 45 to complete relay transmission.

Finally, it is to be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.