Mining wireless sensor system and communication method thereof

Abstract

The invention provides a mining wireless sensor system and a communication method thereof, the mining wireless sensor system comprises a wireless receiving end, a wireless sensor, a hand-held terminal and a main controller, the wireless receiving end and the wireless sensor are both in bidirectional communication with the hand-held terminal through Bluetooth, and the wireless receiving end is also in bidirectional communication with the main controller through Ethernet. And the wireless receiving end is also in wireless communication with the wireless sensor through LoRa. The mining wireless sensor system has the advantages that the communication and power supply modes of a traditional sensor are changed, wireless communication and battery power supply modes are used, arrangement of power lines and data lines is reduced, the work of laying and disassembling cables by workers is greatly reduced, the equipment failure rate is effectively reduced, and the installation position is flexible. Low-power-consumption components are selected, and the standby time of the sensor is prolonged by optimizing power consumption management through cooperation of software and hardware. The system can set different communication channels or communication rates through a mobile phone APP, and prevents co-frequency interference through channel isolation.

Description

Technical Field

[0001] This invention belongs to the field of wireless sensor communication technology for mining, and in particular relates to a wireless sensor system for mining and its communication method. Background Technology

[0002] Currently, traditional sensors mostly use wired communication for communication and power supply, but this involves a lot of power and data cables, making the work of laying and dismantling cables arduous for workers. Wireless communication is also used, which can reduce the number of power and data cables, but traditional wireless sensors have the disadvantage of needing to replace batteries regularly. In addition, due to the complex underground environment and strong electromagnetic interference, wireless sensors also suffer from co-channel interference and problems such as rapid attenuation and easy interruption underground. Summary of the Invention

[0003] In view of this, the present invention aims to propose a wireless sensor system for mining and its communication method to solve the problems of rapid attenuation and easy interruption of traditional wireless technology underground.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows: In a first aspect, the present invention provides a wireless sensor system for mining, comprising a wireless receiver, a wireless sensor, a handheld terminal, and a main controller. The wireless receiver and the wireless sensor communicate bidirectionally with the handheld terminal via Bluetooth. The wireless receiver also communicates bidirectionally with the main controller via Ethernet. Furthermore, the wireless receiver and the wireless sensor communicate wirelessly via LoRa. Furthermore, the wireless sensor includes a battery module and a main control module. The main control module includes a power switch, a voltage conversion module, a main control MCU, an analog quantity detection unit, a digital quantity detection unit, a battery voltage detection unit, a button, an LED, a LoRa antenna, a Bluetooth module, and a Bluetooth antenna. The battery module is connected to the voltage conversion module via the power switch. The main control MCU is connected to the analog quantity detection unit, the digital quantity detection unit, the battery voltage detection unit, the button, the LED, the LoRa antenna, and the Bluetooth module. The Bluetooth module is connected to the Bluetooth antenna.

[0005] Secondly, based on the same concept, the present invention also provides a communication method for a mining wireless sensor system, including a sensor network access method, a communication method between a wireless data collector and a wireless sensor, and a low-power processing method. The sensor network access method includes an active sensor network access method and a manual sensor network access method. The active sensor network access method includes an active network access method at the wireless sensor end and an active network access method at the wireless data collector end. The manual sensor network access method includes a manual network access method at the wireless data collector end and a manual network access method at the wireless sensor end. The active network access method at the wireless sensor end includes the following steps: A1. Power on the device and confirm that the wireless collector has entered automatic networking mode. A2. Network access is triggered via sensor button; A3. The communication indicator light shows the network access result; A4. Determine if network access was successful. If yes, proceed to step A5; otherwise, proceed to step A7. A5. Connection established, proceed to step A7; A6. Troubleshoot the cause based on the fault list and proceed to step A7; A7. The active network access process has ended.

[0006] Furthermore, the active network access method for the wireless collector includes the following steps: B1. The equipment is powered on and working properly; B2. Enter network mode by pressing a button; B3. The screen displays the MAC address and device number of the sensors that have been registered with the network; B4. Determine whether all wireless sensors have joined the network. If yes, proceed to step B5; otherwise, return to step B3. B5. End the network mode by pressing the button and start normal communication; B6. The active network access process has ended.

[0007] Furthermore, the manual network access method for the wireless collector includes the following steps: C1. The device is powered on and working properly, the Bluetooth module is in broadcast mode, and the handheld terminal scans for devices that are broadcasting. C2. Determine the device to connect to based on the device type and MAC address in the scan list, and initiate a connection. C3. Issue a command to switch to manual networking mode; C4. Input network parameters consistent with those of the sensor, and issue network parameter setting instructions; C5. Determine if the setting was successful. If yes, proceed to step C6; otherwise, return to step C4. C6. Setup complete, disconnect Bluetooth connection; C7. Network access complete.

[0008] Furthermore, the manual network access method for the wireless sensor includes the following steps: D1. The device is powered on and working properly, and the Bluetooth module is in broadcast mode; D2. Establish a connection with the APP; D3. Report the current network access mode; D4. Determine whether the current process is an active network entry. If yes, proceed to step D5; otherwise, proceed to step D6. D5. Receive network parameter setting instructions; D6. Execute the instructions and report the results; D7. Setup complete, disconnect Bluetooth connection; D8. Manual network access complete.

[0009] Furthermore, the communication method between the wireless data acquisition device and the wireless sensor includes the following steps: The handheld terminal configures the parameters of the wireless data collector and configures the parameters of multiple wireless sensors to form a network. The wireless data collector sends a broadcast to the wireless sensors in the network upon power-up to wake them up. Two of them sent ACK response signals to the wireless collector; The wireless data collector sends a wake-up command again to the unresponsive wireless sensor; After a wireless sensor that did not respond is woken up, it sends an ACK response signal to the wireless data collector. Two of the wireless sensors periodically report heartbeat data to the wireless data collector, and the wireless data collector sends ACK response signals to two of them. After being double-wake-up, the wireless sensor periodically reports heartbeat data to the wireless data collector. If no response is received, it resends the reported data until the repetition count is reached; until the wireless data collector sends an ACK response signal to it. If one of the wireless sensors malfunctions or is in an alarm state, it immediately uploads the abnormal information to the wireless data collector, which then sends an ACK response signal to it.

[0010] Furthermore, the low-power processing method includes the following steps: E1, Low power consumption processing; E2, Read the event flag; E3. Determine if there is an event currently being executed. If yes, return to step E2; otherwise, proceed to step E4. E4, low-power configuration; E5. Enter hibernation; E6, Waiting to be woken up event; E7, Wake-up Configuration.

[0011] Compared with existing technologies, the mining wireless sensor system and its communication method described in this invention have the following advantages: (1) The mining wireless sensor system and its communication method described in this invention change the traditional communication and power supply methods of sensors by using wireless communication and battery power supply, reducing the layout of power cables and data cables, greatly reducing the work of workers laying and dismantling cables, and effectively reducing the equipment failure rate. The installation location is flexible. Wireless sensors have the disadvantage of needing to replace batteries regularly. This can be improved by using batteries with high energy density, selecting low-power components, and optimizing power management through software and hardware collaboration. The system can set different communication channels or communication rates through a mobile APP, and prevent co-channel interference through channel isolation.

[0012] (2) The wireless sensor system and communication method for mining described in this invention are designed to effectively cover complex underground roadways in coal mines due to the complex underground environment and strong electromagnetic interference. This wireless sensor system, relying on the long-distance transmission characteristics of LoRa technology, solves the problem of rapid attenuation and easy interruption of traditional wireless technology underground.

[0013] (3) The wireless sensor system and communication method for mining described in this invention adopts a low-power design. By using a battery with high energy density, selecting low-power devices, using a sleep-wake mechanism, and cooperating with software and hardware, power consumption is reduced and usage time is extended. This allows the sensor to work stably for a long time without frequent battery replacements or external power supply, thus avoiding safety hazards and manpower waste caused by battery maintenance. Attached Figure Description

[0014] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the principle of the wireless sensor system for mining as described in an embodiment of the present invention; Figure 2 This is a schematic diagram of the data flow of the wireless sensor system for mining as described in an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the principle of the wireless sensor described in an embodiment of the present invention; Figure 4 This is a functional diagram illustrating the wireless sensor configuration described in an embodiment of the present invention; Figure 5 This is a schematic diagram of the active network access operation process described in an embodiment of the present invention; Figure 6 This is a schematic diagram of the manual network access operation process described in an embodiment of the present invention; Figure 7 This is a schematic diagram of the communication process between the wireless data collector and the wireless sensor as described in an embodiment of the present invention; Figure 8This is a schematic diagram of the low-power processing flow described in an embodiment of the present invention. Detailed Implementation

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0016] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0017] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] like Figures 1 to 8 As shown, the mining wireless sensor system includes a wireless receiver (wireless data collector), wireless sensors, a handheld terminal, and a main controller. The wireless receiver and wireless sensors communicate bidirectionally with the handheld terminal via Bluetooth. The wireless receiver also communicates bidirectionally with the main controller via Ethernet. Furthermore, the wireless receiver and wireless sensors communicate wirelessly via LoRa. The relationship diagram of the mining wireless sensor system is shown below. Figure 1 As shown.

[0020] In a preferred embodiment of the present invention, the wireless receiver is the organizer and manager of the wireless sensor network. It communicates downwards with sensor terminals within the network to receive sensor data and issue commands; and communicates upwards with the main controller to upload sensor data and receive controller commands. The wireless sensor terminals are various types of sensors that collect data at their respective time intervals according to their sensor type and communicate with the wireless receiver at regular intervals. The handheld terminal communicates wirelessly with the data collector and wireless sensors, and can configure parameters for the sensor terminals and the concentrator / data collector wirelessly.

[0021] In a preferred embodiment of the present invention, the data stream of the mining wireless sensor system is as follows: Figure 2 As shown, the wireless sensor, wireless receiver, and handheld terminal can configure and query parameters; the wireless sensor and wireless receiver can interact during the networking process and report status and heartbeat data; and the wireless receiver and main controller can query data.

[0022] The composition of wireless sensors is as follows Figure 3 As shown. The wireless sensor includes a battery module and a main control module. The main control module includes a power switch, a voltage conversion module, a main control MCU, an analog quantity detection unit, a digital quantity detection unit, a battery voltage detection unit, a button, an LED, a LoRa antenna, a Bluetooth module, and a Bluetooth antenna. The battery module is connected to the voltage conversion module via the power switch. The main control MCU is connected to the analog quantity detection unit, the digital quantity detection unit, the battery voltage detection unit, the button, the LED, the LoRa antenna, and the Bluetooth module. The Bluetooth module is connected to the Bluetooth antenna.

[0023] In this embodiment, the selection principles are as follows: the sensor is battery-powered; to achieve long standby time, the overall power consumption must be low. Therefore, a battery with high energy density is selected, a high-efficiency voltage conversion chip is chosen, a low-power Bluetooth module is selected, and an LPUART interface is selected for the communication port. This allows the MCU and Bluetooth to be woken up promptly even from deep sleep states, shortening wake-up time, reducing the need for additional wake-up circuitry, and minimizing power consumption. The battery voltage detection unit periodically monitors the battery status; if the battery is low, it responds promptly with an indicator light and adjusts the data reporting interval as needed to reduce overall power consumption and extend device usage time. Figure 4 As shown, the wireless sensor software program has Bluetooth wireless communication function, LoRa wireless communication function, battery voltage detection function, switch signal detection function, analog signal detection function, status indication function, key detection function, and low power consumption function.

[0024] This invention also proposes a communication method for a mining wireless sensor system, including a sensor network access method, a communication method between a wireless data logger and a wireless sensor, and a low-power processing method. The sensor network access method includes an active sensor network access method and a manual sensor network access method. The active sensor network access method includes an active network access method at the wireless sensor end and an active network access method at the wireless data logger end. The manual sensor network access method includes a manual network access method at the wireless data logger end and a manual network access method at the wireless sensor end. The active network access method at the wireless sensor end includes the following steps: A1. Power on the device and confirm that the wireless collector has entered automatic networking mode. A2. Network access is triggered via sensor button; A3. The communication indicator light shows the network access result; A4. Determine if network access was successful. If yes, proceed to step A5; otherwise, proceed to step A7. A5. Connection established, proceed to step A7; A6. Troubleshoot the cause based on the fault list and proceed to step A7; A7. The active network access process has ended.

[0025] In a preferred embodiment of the present invention, the active network access method of the wireless collector includes the following steps: B1. The equipment is powered on and working properly; B2. Enter network mode by pressing a button; B3. The screen displays the MAC address and device number of the sensors that have been registered with the network; B4. Determine whether all wireless sensors have joined the network. If yes, proceed to step B5; otherwise, return to step B3. B5. End the network mode by pressing the button and start normal communication; B6. The active network access process has ended.

[0026] In a preferred embodiment of the present invention, the manual network access method of the wireless collector includes the following steps: C1. The device is powered on and working properly, the Bluetooth module is in broadcast mode, and the handheld terminal scans for devices that are broadcasting. C2. Determine the device to connect to based on the device type and MAC address in the scan list, and initiate a connection. C3. Issue a command to switch to manual networking mode; C4. Input network parameters consistent with those of the sensor, and issue network parameter setting instructions; C5. Determine if the setting was successful. If yes, proceed to step C6; otherwise, return to step C4. C6. Setup complete, disconnect Bluetooth connection; C7. Network access complete.

[0027] In a preferred embodiment of the present invention, the manual network access method for the wireless sensor includes the following steps: D1. The device is powered on and working properly, and the Bluetooth module is in broadcast mode; D2. Establish a connection with the APP; D3. Report the current network access mode; D4. Determine whether the current process is an active network entry. If yes, proceed to step D5; otherwise, proceed to step D6. D5. Receive network parameter setting instructions; D6. Execute the instructions and report the results; D7. Setup complete, disconnect Bluetooth connection; D8. Manual network access complete.

[0028] In a preferred embodiment of the present invention, the sensor network access method is as follows: LoRa Communication Network Access Method Explanation: Wireless sensor systems need to perform a network access operation before data exchange. Normal communication is only possible when the sensor is connected to the same network as the data acquisition unit. There are two network access methods: Active network access: The sensor and wireless data acquisition unit are initialized with default communication rates, network IDs, and network access channels. The data acquisition unit is configured with its data communication channel and assigns a communication channel and device number to sensors that have triggered network access requests. Sensors default to active network access mode. The active network access procedure is as follows: Figure 5 As shown.

[0029] Manual network access: The wireless data collector and sensor communicate via a mobile app, using fixed network parameters and communication channels and speeds. The manual network access process is as follows: Figure 6 As shown.

[0030] In a preferred embodiment of the present invention, the communication method between the wireless data collector and the wireless sensor includes the following steps: The handheld terminal configures the parameters of the wireless data collector and configures the parameters of multiple wireless sensors to form a network. The wireless data collector powers on and broadcasts a message to the wireless sensors within the network to wake them up. Two of them sent ACK response signals to the wireless collector; The wireless data collector sends a wake-up command again to the unresponsive wireless sensor; After a wireless sensor that did not respond is woken up, it sends an ACK response signal to the wireless data collector. Two of the wireless sensors periodically report heartbeat data to the wireless data collector, and the wireless data collector sends ACK response signals to two of them. After being double-wake-up, the wireless sensor periodically reports heartbeat data to the wireless data collector. If no response is received, it resends the reported data until the repetition count is reached; until the wireless data collector sends an ACK response signal to it. If one of the wireless sensors malfunctions, it immediately uploads the abnormal information to the wireless collector, which then sends an ACK response signal to it.

[0031] In a preferred embodiment of the present invention, the communication process between the data acquisition unit and the wireless sensor in the wireless sensor system includes: like Figure 7 As shown, the two communicating parties establish a connection using a star network topology, with the data acquisition unit acting as the receiver (master) and the sensors as slaves. Bidirectional data exchange is enabled. After the master unit powers on and allocates reporting time slots to the sensors within the network, the sensors actively report according to the time slots. In case of emergencies, they report immediately. After power-on, the master unit only replies with response data and does not engage in further data exchange to prevent data conflicts.

[0032] Data interaction reliability strategy: All data interactions have a response judgment mechanism. If there is no response, the current data is immediately resent. If there is still no response after reaching the maximum number of resentments, a fault judgment is made and reported to the main control to remind maintenance.

[0033] In a preferred embodiment of the present invention, the low-power processing method includes the following steps: E1, Low power consumption processing; E2, Read the event flag; E3. Determine if there is an event currently being executed. If yes, return to step E2; otherwise, proceed to step E4. E4, low-power configuration; E5. Enter hibernation; E6, Waiting to be woken up event; E7, Wake-up Configuration.

[0034] In a preferred embodiment of the present invention, the low-power processing method is as follows: The sensor is battery powered and immediately reports data upon power-up. If there is no response from the data acquisition unit, it enters a deep sleep state, waiting for the data acquisition unit to wake it up, thus saving power consumption.

[0035] When the data collector is powered on, it immediately sends a wake-up data packet. After receiving the packet, the sensor switches to normal working mode and wakes up the data according to the set timing sequence. Then, it enters deep sleep mode and wakes up according to the set timing cycle to report data.

[0036] After the sensor is woken up, it reports status data at heartbeat intervals. The rest of the time it is in deep sleep. During this time, the data acquisition unit only replies with response data and there is no other data interaction, which reduces the communication frequency, reduces the number of times the sensor is woken up, and saves power consumption.

[0037] During the interaction between the data acquisition unit and the sensor, the quality of the communication signal can be obtained, and the communication parameters can be dynamically adjusted. If the quality is good, the wireless transmission power can be reduced, the communication rate can be increased, the data transmission time in the air can be shortened, the sensor wake-up time can be reduced, and power consumption can be saved.

[0038] In the overall process, when the sensor detects that no task is being executed, it enters a low-power state until it is woken up by a wake-up source.

[0039] The low-power mode employs a deep sleep mode, in which the CPU and high-speed clock cease operation. Wake-up sources include GPIO, LPUART, LPTIME, and RTC. The low-power event handling flow is as follows: Figure 8 As shown.

[0040] Advantages of this invention: (1) The mining wireless sensor system and its communication method described in this invention change the traditional communication and power supply methods of sensors by using wireless communication and battery power supply, reducing the layout of power cables and data cables, greatly reducing the work of workers laying and dismantling cables, and effectively reducing the equipment failure rate. The installation location is flexible. Wireless sensors have the disadvantage of needing to replace batteries regularly. This can be improved by using batteries with high energy density, selecting low-power components, and optimizing power management through software and hardware collaboration. The system can set different communication channels or communication rates through a mobile APP, and prevent co-channel interference through channel isolation.

[0041] (2) The wireless sensor system and communication method for mining described in this invention are designed to effectively cover complex underground roadways in coal mines due to the complex underground environment and strong electromagnetic interference. This wireless sensor system, relying on the long-distance transmission characteristics of LoRa technology, solves the problem of rapid attenuation and easy interruption of traditional wireless technology underground.

[0042] (3) The wireless sensor system and communication method for mining described in this invention adopts a low-power design. By using a battery with high energy density, selecting low-power devices, using a sleep-wake mechanism, and cooperating with software and hardware, power consumption is reduced and usage time is extended. This allows the sensor to work stably for a long time without frequent battery replacements or external power supply, thus avoiding safety hazards and manpower waste caused by battery maintenance.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wireless sensor system for mining, characterized in that: It includes a wireless receiver, a wireless sensor, a handheld terminal, and a main controller. The wireless receiver and the wireless sensor communicate bidirectionally with the handheld terminal via Bluetooth. The wireless receiver also communicates bidirectionally with the main controller via Ethernet. The wireless receiver and the wireless sensor also communicate wirelessly via LoRa.

2. The wireless sensor system for mining according to claim 1, characterized in that: The wireless sensor includes a battery module and a main control module. The main control module includes a power switch, a voltage conversion module, a main control MCU, an analog quantity detection unit, a digital quantity detection unit, a battery voltage detection unit, a button, an LED, a LoRa antenna, a Bluetooth module, and a Bluetooth antenna. The battery module is connected to the voltage conversion module via the power switch. The main control MCU is connected to the analog quantity detection unit, the digital quantity detection unit, the battery voltage detection unit, the button, the LED, the LoRa antenna, and the Bluetooth module. The Bluetooth module is connected to the Bluetooth antenna.

3. A communication method for a mining wireless sensor system, using the mining wireless sensor system according to any one of claims 1-2, characterized in that: It includes sensor network access methods, wireless data acquisition device and wireless sensor communication methods, and low-power processing methods. The sensor network access methods include active sensor network access and manual sensor network access. The active sensor network access methods include active network access by the wireless sensor end and active network access by the wireless data acquisition device end. The manual sensor network access methods include manual network access by the wireless data acquisition device end and manual network access by the wireless sensor end.

4. The communication method of the mining wireless sensor system according to claim 3, characterized in that: The active network access method for wireless sensors includes the following steps: A1. Power on the device and confirm that the wireless collector has entered automatic networking mode. A2. Network access is triggered via sensor button; A3. The communication indicator light shows the network access result; A4. Determine if network access was successful. If yes, proceed to step A5; otherwise, proceed to step A6. A5. Connection established, proceed to step A7; A6. Troubleshoot the cause based on the fault list and proceed to step A7; A7. The active network access process has ended.

5. The communication method of the mining wireless sensor system according to claim 3, characterized in that: The active network access method for wireless data collectors includes the following steps: B1. The equipment is powered on and working properly; B2. Enter network mode by pressing a button; B3. The screen displays the MAC address and device number of the sensors that have been registered with the network; B4. Determine whether all wireless sensors have joined the network. If yes, proceed to step B5; otherwise, return to step B3. B5. End the network mode by pressing the button and start normal communication; B6. The active network access process has ended.

6. The communication method of the mining wireless sensor system according to claim 3, characterized in that: The manual network access method for the wireless collector includes the following steps: C1. The device is powered on and working properly, the Bluetooth module is in broadcast mode, and the handheld terminal scans for devices that are broadcasting. C2. Determine the device to connect to based on the device type and MAC address in the scan list, and initiate a connection. C3. Issue a command to switch to manual networking mode; C4. Input network parameters consistent with those of the sensor, and issue network parameter setting instructions; C5. Determine if the setting was successful. If yes, proceed to step C6; otherwise, return to step C4. C6. Setup complete, disconnect Bluetooth connection; C7. Network access complete.

7. The communication method of the mining wireless sensor system according to claim 3, characterized in that: The manual network access method for the wireless sensor includes the following steps: D1. The device is powered on and working properly, and the Bluetooth module is in broadcast mode; D2. Establish a connection with the APP; D3. Report the current network access mode; D4. Determine whether the current process is an active network entry. If yes, proceed to step D5; otherwise, proceed to step D6. D5. Receive network parameter setting instructions; D6. Execute the instructions and report the results; D7. Setup complete, disconnect Bluetooth connection; D8. Manual network access complete.

8. The communication method of the mining wireless sensor system according to claim 3, characterized in that: The communication method between the wireless data acquisition device and the wireless sensor includes the following steps: The handheld terminal configures the parameters of the wireless data collector and configures the parameters of multiple wireless sensors to form a network. The wireless data collector sends a broadcast to the wireless sensors in the network upon power-up to wake them up. Two of them sent ACK response signals to the wireless collector; The wireless data collector sends a wake-up command again to the unresponsive wireless sensor; After a wireless sensor that did not respond is woken up, it sends an ACK response signal to the wireless data collector. Two of the wireless sensors periodically report heartbeat data to the wireless data collector, and the wireless data collector sends ACK response signals to two of them. After being double-wake-up, the wireless sensor periodically reports heartbeat data to the wireless data collector. If no response is received, it resends the reported data until the repetition count is reached; until the wireless data collector sends an ACK response signal to it. If one of the wireless sensors malfunctions or is in an alarm state, it immediately uploads the abnormal information to the wireless data collector, which then sends an ACK response signal to it.

9. The communication method of the mining wireless sensor system according to claim 3, characterized in that: The low-power processing method includes the following steps: E1, Low power consumption processing; E2, Read the event flag; E3. Determine if there is an event currently being executed. If yes, return to step E2; otherwise, proceed to step E4. E4, low-power configuration; E5. Enter hibernation; E6, Waiting to be woken up event; E7, Wake-up Configuration.

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