Method and system for positioning personnel in high-voltage cable tunnel

Abstract

The invention provides a method and system for positioning personnel in a high-voltage cable tunnel, and belongs to the technical field of positioning of personnel in tunnels, the system comprises a front-end interaction module, label identification devices and a rear-end control module, the front-end interaction module is fixed on limbs of personnel, and the label identification devices are installed in the tunnel at equal intervals; the front-end interaction module comprises a positioning assembly which is used for generating identity information and transmitting the identity information, and is also used for adjusting the signal transmission intensity of the identity information according to the installation interval of the label identification devices, and then adjusting the signal coverage range to be larger than the installation interval of the label identification devices. The label identification device is used for acquiring the identity information; the rear-end control module comprises a control unit, and the control unit is used for verifying the identity information, generating positioning information according to the installation position of the label recognition device and the signal intensity of the received identity information, and positioning the position of a person in the tunnel.

Description

Technical Field

[0001] The present invention belongs to the technical field of personnel positioning in tunnels, and in particular relates to a method and system for positioning personnel in a high-voltage cable tunnel. Background Art

[0002] Since the high-voltage cable tunnel is located deep underground, wireless signals cannot pass through it, resulting in a lack of mobile communication and GPS / Beidou positioning signals in the tunnel. Therefore, it is impossible to locate the personnel in the tunnel. When danger occurs in the tunnel, the location of the personnel cannot be queried in time and voice instructions cannot be issued, which poses a safety hazard and directly affects the life safety of the personnel in the tunnel.

[0003] The present invention is to solve the problem of positioning personnel in cable tunnels. Through a large amount of preliminary on-site investigation and technical research, combined with the structural characteristics of cable tunnels, a method and system for positioning personnel in high-voltage cable tunnels are proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is the positioning problem of personnel in a cable tunnel without mobile communication and GPS / Beidou positioning signals. In view of the shortcomings of the prior art, a method and system for positioning personnel in a high-voltage cable tunnel is provided. To solve the above technical problems, the technical solution adopted by the present invention is as follows: comprising a front-end interaction module, a tag identification device and a back-end control module, wherein the front-end interaction module is fixed on the limbs of the personnel, and the tag identification devices are installed at equal intervals inside the tunnel; the tag identification devices are all in communication connection with the back-end control module; The front-end interaction module includes a positioning component: the positioning component is used to generate and transmit identity information, and is also used to adjust the signal transmission strength of the identity information according to the installation interval of the tag identification device, thereby adjusting the signal coverage to be greater than the installation interval of the tag identification device; Tag identification device: used to obtain the identity information; The back-end control module includes a control unit: the control unit is used to verify identity information and also to generate positioning information according to the installation position of the tag identification device combined with the signal strength of the received identity information to locate the position of the person in the tunnel.

[0005] Furthermore, the positioning component includes an RFID transmitter and a modulator, and the modulator is used to adjust the intensity of the RFID signal emitted by the RFID transmitter.

[0006] Furthermore, the front-end interaction module also includes a camera component and a voice dialogue component. The camera component is used to realize video monitoring and image intelligent analysis in combination with a tag recognition device, realize face recognition and comparison, verify personnel information, and monitor the activity area of ​​tunnel personnel; the voice dialogue component is used for voice communication.

[0007] Furthermore, the front-end interaction module also includes a rescue component: the rescue component includes a button for rescue, and when the button is pressed, a rescue signal is sent out. The rescue component is connected to a tag identification device, and when the rescue component button is pressed, the tag identification device transmits the rescue information to the control unit.

[0008] Furthermore, the positioning component includes a heart rate detection module and an acceleration sensor. The heart rate detection module is used to detect the heart rate signs of tunnel personnel, and the acceleration sensor is used to detect the number of movement steps. The positioning component is also used to send the heart rate signs and the number of movement steps to the control unit along with the identity information. The heart rate signs are used to monitor vital signs, and the number of movement steps is used to assist in personnel positioning.

[0009] A method for positioning personnel in a high-voltage cable tunnel is implemented based on a personnel positioning system in a high-voltage cable tunnel, and is characterized by comprising: The front-end interactive module worn by the personnel generates and transmits identity information; Tag identification devices arranged at equal intervals in the tunnel obtain the identity information; The back-end control module verifies the identity information, generates positioning information based on the installation position of the tag identification device and the signal strength of the received identity information, and locates the position of the person in the tunnel.

[0010] Furthermore, it also includes: the front-end interaction module adjusts the strength of the identity information signal, thereby adjusting the signal coverage range.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. Due to its closed and deep nature, the tunnel construction environment often makes conventional GPS positioning technology ineffective. In order to solve this problem, RFID (radio frequency identification technology) is used to provide accurate positioning services for workers. After the tag identification device is deployed in the tunnel, the test personnel are first placed in different positions to transmit signals and record the signal strength ratio of the tag device before and after the position, and record the relationship between the personnel position and the signal strength ratio; When the staff enters the tunnel, they can transmit signals through the positioning component. When only one set of tag identification devices receives the signal, it means that the staff is near the tag identification device. When the front and rear sets of tag identification devices receive signals, the control module uses the signal strength of the tag identification device in the front direction of movement to divide the signal strength of the tag identification device in the rear direction of movement to obtain the strength ratio according to the signal strength of the information received by the tag identification device. The current position of the personnel in the tunnel can be obtained by combining the obtained ratio with the positions of the front and rear tag identification devices and comparing it with the previously obtained relationship between the personnel position and the signal strength ratio, and the personnel positioning is completed. When multiple sets of tag identification devices receive signals, the two sets of tag identification devices with the largest signal strength are selected to complete the positioning according to the above method.

[0012] 2. Before the workers enter the tunnel, each person will be issued a positioning component, which will be fixed on the worker's body, such as a bracelet. The information on these bracelets will be associated with the corresponding personnel information in the platform database, and the areas that are authorized to work will be set according to the tunnel layout. When the workers exceed these areas, the system will pop up an alarm message and broadcast the out-of-work range reminder through the nearest voice device, thereby intelligently supervising the workers' working areas and avoiding out-of-range operations.

[0013] 3. After a person enters the tunnel, the wristband will be identified by the deployed tag reader, and the identified ID number will be reported to the server. The service program will search the database for the corresponding personnel information based on the ID number, and compare it with the personnel information on the work ticket to determine that it is the person allowed to enter the work ticket, and then start the camera face recognition algorithm to perform face recognition comparison to further determine that it is the person who enters. In this way, every time a monitoring point is passed, the ID information and time will be reported, so that the trajectory of the person can be formed; The camera associated with the tag recognition device in the tunnel can automatically control the preset position to retrieve nearby video images to intuitively understand the on-site situation. The face recognition of personnel can be performed through image intelligent analysis technology, combined with a one-touch emergency button, to better ensure the location acquisition and safe operation of personnel in the tunnel.

[0014] 4. When on-site personnel need help or emergency rescue, they can press the button, the tag recognition device will detect and send an emergency alarm signal to the main station. The on-duty personnel of the monitoring center will locate the position of the person based on the alarm information, and start the video monitoring and voice intercom functions to realize emergency calls with on-site personnel, communicate, solve emergency problems or guide their retreat path to ensure the personal safety of on-site personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0016] Figure 1: A schematic diagram of the structure of the system connection in Example 1 of the present invention; Figure 2 : A schematic diagram of the distribution of the tag recognition device and the camera assembly in the tunnel in Example 1 of the present invention; DETAILED DESCRIPTION

[0017] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the embodiments and the accompanying drawings, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0018] Example 1: See Figure 1-2 , a personnel positioning system in a high-voltage cable tunnel of this embodiment, which includes a front-end interaction module, a tag identification device and a back-end control module, the front-end interaction module is fixed on the limbs of the personnel, the tag identification devices are installed inside the tunnel at equal intervals, and the tag identification devices are all connected to the back-end control module for communication; The front-end interaction module includes a positioning component: the positioning component is used to generate and transmit identity information, and is also used to adjust the signal transmission strength of the identity information according to the installation interval of the tag identification device, thereby adjusting the signal coverage to be greater than the installation interval of the tag identification device. The positioning component includes a main body and a strap, and the strap installs the positioning component on the wrist of the tunnel personnel; Tag identification device: such as Figure 2 As shown, the tag identification devices are distributed in the tunnel, and different tag identification devices can be used to continuously obtain the identity information while the tunnel personnel move; The back-end control module includes a control unit: the control unit is used to verify the identity information and is also used to generate positioning information based on the installation position of the tag identification device combined with the signal strength of the received identity information to locate the position of the person in the tunnel; After the tag identification device is deployed in the tunnel, the test personnel are first placed in different positions to transmit signals and record the signal strength ratio of the tag device before and after the position, and record the relationship between the personnel position and the signal strength ratio; When the staff enters the tunnel, they can transmit signals through the positioning component. When only one set of tag identification devices receives the signal, it means that the staff is near the tag identification device. When the front and rear sets of tag identification devices receive signals, the control module uses the signal strength of the tag identification device in the front direction of movement to divide the signal strength of the tag identification device in the rear direction of movement to obtain the strength ratio according to the signal strength of the information received by the tag identification device. After combining the obtained ratio with the positions of the front and rear tag identification devices, the current position of the personnel in the tunnel can be obtained by comparing it with the previously obtained relationship between the personnel position and the signal strength ratio, and the personnel positioning is completed. When multiple sets of tag identification devices receive signals, the two sets of tag identification devices with the largest signal strength are selected to complete the positioning according to the above method.

[0019] See also Figure 1-2 The positioning component includes an RFID transmitter and a modulator. The modulator is used to adjust the strength of the RFID signal emitted by the RFID transmitter, thereby adjusting the size of the coverage range so that the RFID signal coverage diameter is larger than the installation interval of the two sets of tag identification devices. The position of the tunnel personnel is obtained according to the strength of the signal received by the tag identification device in the tunnel. The system does not rely on external signals such as GPS and is fully suitable for closed and underground construction environments. By dynamically adjusting the signal strength, the system can adapt to the complex and changeable environment in the tunnel, and can monitor the position of workers in real time, thereby increasing the protection of workers' safety. Especially in an emergency, before the operating personnel enter the tunnel, each person will be issued a positioning component, which is fixed on the personnel's limbs, such as a bracelet with an RFID tag. The information of these bracelets is associated with the corresponding personnel information in the platform database, and according to the tunnel layout diagram, set which areas are authorized work areas. When the operating personnel exceed these areas, the system will pop up an alarm message and broadcast the out-of-work range reminder through the nearest voice device, thereby intelligently supervising the working area of ​​the operating personnel to avoid out-of-range operations.

[0020] See also Figure 1-2 The front-end interaction module also includes a camera component and a voice dialogue component. The camera component is used to realize video monitoring and image intelligent analysis in combination with the tag recognition device, realize face recognition and comparison, verify personnel information, and monitor the activity area of ​​tunnel personnel; the voice dialogue component is used for voice communication; After a person enters the tunnel, the wristband will be identified by the deployed tag reader, and the identified ID number will be reported to the server. The service program will search the database for the corresponding personnel information based on the ID number, and compare it with the personnel information on the work ticket to determine that it is the person allowed to enter the tunnel. Then, the camera face recognition algorithm will be started to perform face recognition and comparison to further determine that it is the person who entered. In this way, every time a monitoring point is passed, the ID information and time will be reported, so that the trajectory of the person can be formed.

[0021] See also Figure 1-2 The front-end interaction module further includes a help component: the help component includes a button for asking for help, and when the button is pressed, a help signal is sent out, and the help component is connected to a tag identification device, and when the button of the help component is pressed, the tag identification device transmits the help information to the control unit; When on-site personnel need help or emergency rescue, they can press a button, and the tag recognition device will detect and send an emergency alarm signal to the main station. The on-duty personnel of the monitoring center will locate the position of the person based on the alarm information, and start the video monitoring and voice intercom functions to realize emergency calls with on-site personnel, communicate, solve emergency problems or guide retreat, and ensure the personal safety of on-site personnel.

[0022] See also Figure 1 The positioning component includes a heart rate detection module and an acceleration sensor. The heart rate detection module is used to detect the heart rate signs of tunnel personnel, and the acceleration sensor is used to detect the number of movement steps. The positioning component is also used to send the heart rate signs and the number of movement steps to the control unit along with the identity information. The heart rate signs are used to monitor vital signs, and the number of movement steps is used to assist in positioning personnel. When passing through the tag identification device, the number of steps is recorded, and the position of the tunnel personnel is assisted by the increase or decrease of the number of movement steps.

[0023] Beneficial effects: 1. Due to its closed and deep nature, the tunnel construction environment often makes conventional GPS positioning technology ineffective. In order to solve this problem, RFID (radio frequency identification technology) is used to provide accurate positioning services for workers. After the tag identification device is deployed in the tunnel, the test personnel are first placed in different positions to transmit signals and record the signal strength ratio of the tag device before and after the position, and record the relationship between the personnel position and the signal strength ratio; When the staff enters the tunnel, they can transmit a signal through the positioning component. When only one group of tag identification devices receives the signal, it means that the person is near the tag identification device. When the front and rear groups of tag identification devices receive signals, the control module uses the signal strength of the tag identification device in the front direction of movement to divide the signal strength of the tag identification device in the rear direction of movement to obtain the strength ratio according to the signal strength of the information received by the tag identification device. After combining the obtained ratio with the positions of the front and rear tag identification devices, the current position of the personnel in the tunnel can be obtained by comparing it with the previously obtained relationship between the personnel position and the signal strength ratio, and the personnel positioning is completed. When multiple groups of tag identification devices receive signals, the two groups of tag identification devices with the largest signal strength are selected to complete the positioning according to the above method. 2. Before the workers enter the tunnel, each person will be issued a positioning component, which will be fixed on the worker's body, such as a bracelet. The information on these bracelets will be associated with the corresponding personnel information in the platform database, and the areas that are authorized to work will be set according to the tunnel layout. When the workers exceed these areas, the system will pop up an alarm message and broadcast the out-of-work range reminder through the nearest voice device, thereby intelligently supervising the workers' working areas and avoiding out-of-range operations.

[0024] Embodiment 2: A method for positioning personnel in a high-voltage cable tunnel is implemented based on the system for positioning personnel in a high-voltage cable tunnel as described in Embodiment 1, and comprises: The front-end interactive module worn by the personnel generates and transmits identity information; The tag identification devices arranged at equal intervals in the tunnel obtain the identity information, and the signal coverage range of the identity information is adjusted according to the installation interval of the tag identification devices; The back-end control module verifies the identity information, generates positioning information based on the installation position of the tag identification device and the signal strength of the received identity information, and locates the position of the person in the tunnel.

[0025] The ratio positioning method can avoid signal fluctuations caused by changes in factors such as temperature interference, which in turn affects the calculation of personnel positions. Compared with directly using signal strength for positioning, the ratio positioning method is less affected by environmental interference and has a smaller personnel positioning deviation.

[0026] Also includes: the front-end interaction module adjusts the strength of the identity information signal, thereby adjusting the signal coverage range Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A personnel positioning system in a high-voltage cable tunnel, characterized in that: It includes a front-end interaction module, a tag recognition device and a back-end control module. The front-end interaction module is fixed on the limbs of the personnel, and the tag recognition devices are installed inside the tunnel at equal intervals; the tag recognition devices are all connected to the back-end control module for communication; The front-end interaction module includes a positioning component: the positioning component is used to generate and transmit identity information, and is also used to adjust the signal transmission strength of the identity information according to the installation interval of the tag identification device, thereby adjusting the signal coverage to be greater than the installation interval of the tag identification device; Tag identification device: used to obtain the identity information; The back-end control module includes a control unit: the control unit is used to verify identity information and also to generate positioning information according to the installation position of the tag identification device combined with the signal strength of the received identity information to locate the position of the person in the tunnel.

2. The personnel positioning system in a high-voltage cable tunnel according to claim 1, characterized in that: The positioning component includes an RFID transmitter and a modulator, wherein the modulator is used to adjust the strength of the RFID signal transmitted by the RFID transmitter.

3. The personnel positioning system in a high-voltage cable tunnel according to claim 1, characterized in that: The front-end interaction module also includes a camera component and a voice dialogue component. The camera component is used to realize video monitoring and image intelligent analysis in combination with a tag recognition device, realize face recognition and comparison, verify personnel information, and monitor the activity area of ​​tunnel personnel; the voice dialogue component is used for voice communication.

4. The personnel positioning system in a high-voltage cable tunnel according to claim 1, characterized in that: The front-end interactive module also includes a rescue component: the rescue component includes a button for rescue, when the button is pressed, a rescue signal is sent, the rescue component is connected to a tag identification device, when the rescue component button is pressed, the tag identification device transmits the rescue information to the control unit.

5. The personnel positioning system in a high-voltage cable tunnel according to claim 1, characterized in that: The positioning component includes a heart rate detection module and an acceleration sensor. The heart rate detection module is used to detect the heart rate signs of tunnel personnel, and the acceleration sensor is used to detect the number of movement steps. The positioning component is also used to send the heart rate signs and the number of movement steps to the control unit along with the identity information. The heart rate signs are used to monitor vital signs, and the number of movement steps is used to assist in personnel positioning.

6. A method for locating personnel in a high-voltage cable tunnel, based on the system for locating personnel in a high-voltage cable tunnel as claimed in claim 1, characterized in that: include: The front-end interactive module worn by the personnel generates and transmits identity information; Tag identification devices arranged at equal intervals in the tunnel obtain the identity information; The back-end control module verifies the identity information, generates positioning information based on the installation position of the tag identification device and the signal strength of the received identity information, and locates the position of the person in the tunnel.

7. The method for locating personnel in a high-voltage cable tunnel according to claim 6, characterized in that: Also includes: The front-end interaction module adjusts the strength of the identity information signal, thereby adjusting the signal coverage range.

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