A sleep and activation method for an intelligent manhole cover monitoring system based on an accelerometer

Abstract

The present invention discloses a sleep and activation method for an intelligent manhole cover monitoring system based on an accelerometer, comprising the following steps: 1. The intelligent manhole cover monitoring system based on an accelerometer enters a low-power automatic sleep state when it leaves the factory; 2. The intelligent manhole cover monitoring system based on an accelerometer is autonomously activated with low power consumption. The present invention realizes the function of automatically activating the normal operation of the system and automatically entering deep sleep by processing and judging the sampling data of the accelerometer, and can realize the batch automatic detection state entering deep sleep mode for the manhole cover abnormal movement intelligent monitoring system installed in the well or on the urban road before leaving the factory, reduce manual operation on site, the system obtains the current state, and the algorithm determines the function of automatically activating and entering the normal working mode, reduces the time of deep sleep parameter configuration in the production process, does not require the user to disassemble and install the product battery on site or the operation of external trigger activation, avoids the problem of equipment failure to be activated and reworked due to manual factors on site, and improves the efficiency and reliability of on-site work.

Description

Technical Field

[0001] The invention belongs to the technical field of activation of manhole cover monitoring systems, and in particular relates to a sleep and activation method of an intelligent manhole cover monitoring system based on an accelerometer. Background Art

[0002] The intelligent manhole cover monitoring system is used to intelligently monitor abnormal movements of manhole covers. The intelligent manhole cover monitoring system needs to be activated before use. The current activation scheme of the intelligent manhole cover monitoring system has the following shortcomings: First, most IoT monitoring systems currently use the method of opening the battery compartment, connecting the battery connector or external buttons to power on the product to activate the normal working mode of the system. It is inconvenient to disassemble and assemble the wiring on site, and there is a risk of affecting the sealing of the shell, which consumes a lot of time and labor costs; second, the existing method of activating the system through magnetic steel as an external trigger condition is not reliable enough. After the product leaves the factory, it will cause the problem of false triggering and activation during transportation, resulting in unnecessary consumption of the product battery prematurely, and the magnetic steel is also consumed as part of the hardware cost; third, At present, there are cases where the manhole cover monitoring system has the battery installed before leaving the factory and is in normal working mode. The main reason is that there are uncontrollable factors in on-site manual activation, which leads to failure to activate all or part of the deployed products. From the time the equipment leaves the factory to the time it is installed, although it is in a low dormant power consumption when no data is sent, it is inevitable to perform regular sampling and heartbeat reporting in the normal working mode. Compared with the deep dormancy on-site activation method, there is still the situation of premature battery consumption, which shortens the battery life. Fourth, the activation operation has high professional requirements for the installers. They need to activate the system after understanding the product instructions. Simple fool-proof operation is not implemented, and there are human uncontrollable factors in the actual operation.

[0003] During the period from the time the system leaves the factory to the time before it is actually installed, it needs to enter deep sleep mode to reduce the system's power consumption. The current system's sleep scheme has the following shortcomings: First, during the production process, entering the sleep state is generally done through wired methods, such as serial ports, to send sleep setting instructions to each system. This operation consumes a portion of man-hours and is included in the product production time cost; second, through wireless communication, sleep instructions can be issued in batches from the system supervision platform. The system can receive the instruction when there is uplink data and execute the instruction to achieve sleep. This process will be affected by network instability factors, and there is a risk of command or data response packet loss, resulting in unsuccessful sleep and rework, which will still delay the production process and increase the production time cost. Adding an external control switch to the system for sleep or shutdown has a certain impact on the sealing of the protection level of the shell. The manhole cover movement monitoring system needs to have a high waterproof protection performance when used underground. This sleep mode poses a risk to the long-term reliability of the equipment. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a sleep and activation method for an intelligent manhole cover monitoring system based on an accelerometer in response to the deficiencies in the above-mentioned prior art. By processing and judging the accelerometer sampling data, the function of automatically activating the system to work normally and automatically entering deep sleep can be realized. The manhole cover movement intelligent monitoring system installed underground or on urban roads can realize batch automatic detection status before leaving the factory to enter deep sleep mode. After installation, manual operations can be reduced on site. The system obtains the current status and the algorithm determines the function of automatically activating to enter the normal working mode, which reduces the time for configuring deep sleep parameters in the production process and improves production efficiency. It does not require users to disassemble and install product batteries on site or perform external trigger activation operations, thus avoiding the problem of equipment being unable to be activated and reworked due to human factors on site, thereby improving the work efficiency and reliability of the system installed on site by users and facilitating popularization and use.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a dormancy and activation method of an intelligent manhole cover monitoring system based on an accelerometer, characterized in that the method comprises the following steps:

[0006] Step 1: The accelerometer-based intelligent manhole cover monitoring system enters a low-power automatic sleep state when it leaves the factory;

[0007] Step 2: Low-power autonomous activation of the intelligent manhole cover monitoring system based on the accelerometer;

[0008] The accelerometer-based intelligent manhole cover monitoring system includes a shell, an electronic circuit board and a power supply battery arranged in the shell, and the electronic circuit board integrates a microcontroller, an accelerometer connected to the microcontroller, and a wireless communication module.

[0009] The above-mentioned method for dormancy and activation of an intelligent manhole cover monitoring system based on an accelerometer is characterized in that: in step 1, the process of the intelligent manhole cover monitoring system based on an accelerometer entering a low-power automatic dormancy state after leaving the factory includes the following steps:

[0010] Step 101, setting a sleep inclination angle threshold and a sleep time threshold for the accelerometer-based intelligent manhole cover monitoring system to enter a low-power automatic sleep state;

[0011] Step 102: the accelerometer identifies whether the current posture of the accelerometer-based intelligent manhole cover monitoring system in the normal working mode has changed. When the microcontroller does not identify the external trigger interrupt of the accelerometer, the accelerometer-based intelligent manhole cover monitoring system continues to be in the normal working mode; when the microcontroller identifies the external trigger interrupt of the accelerometer, step 103 is executed;

[0012] Step 103, sampling the accelerometer data, and resolving the collected acceleration values ​​into inclination values. When the inclination value is not within the dormant inclination threshold range, return to step 102; when the inclination value is within the dormant inclination threshold range, execute step 104;

[0013] Step 104, accumulating the number of sleep detections once, and determining whether the number of sleep detections has accumulated to a preset number of times. When the number of sleep detections has accumulated to a preset number of times, the accelerometer-based intelligent manhole cover monitoring system enters low-power automatic sleep mode; when the number of sleep detections has not accumulated to a preset number of times, executing step 105;

[0014] Step 105, delay once, and return to step 103;

[0015] The product of one delay time and the preset number of times is equal to the sleep time threshold.

[0016] The above-mentioned accelerometer-based intelligent manhole cover monitoring system sleep and activation method is characterized in that: the sleep inclination angle threshold is 60°~120°; the sleep time threshold is 3min~5min; the delay time is 10s~30s.

[0017] The above-mentioned method for sleeping and activating a smart manhole cover monitoring system based on an accelerometer is characterized in that: in step 104, when the number of sleep detection times reaches a preset number, it is confirmed to enter sleep mode, and the microcontroller sends the information of entering sleep mode to the cloud platform through the wireless communication module, and then the smart manhole cover monitoring system based on the accelerometer enters low-power automatic sleep mode; if the smart manhole cover monitoring system based on the accelerometer fails to sleep mode, no status information will be sent.

[0018] The above-mentioned method for dormancy and activation of an accelerometer-based intelligent manhole cover monitoring system is characterized in that when the accelerometer-based intelligent manhole cover monitoring system is in normal working mode, the accelerometer performs inclination data sampling, timed heartbeat information reporting, alarm status detection and information reporting in real time.

[0019] The above-mentioned method for dormancy and activation of an intelligent manhole cover monitoring system based on an accelerometer is characterized in that: in step 2, the process of low-power autonomous activation of the intelligent manhole cover monitoring system based on an accelerometer includes the following steps:

[0020] Step 201, setting an activation inclination angle threshold, activation sampling time interval and activation time period for low-power autonomous activation of an intelligent manhole cover monitoring system based on an accelerometer;

[0021] Step 202: sampling once according to the set activation sampling time interval within an activation time period, and accumulating the number of samplings, using the accelerometer to sample data, and the microcontroller calculates the corresponding inclination value according to the acceleration value and caches it;

[0022] Step 203, determine whether the inclination value of this sampling is within the activation inclination threshold range. When the inclination value of this sampling is within the activation inclination threshold range, return to step 202 for the next sampling until the activation time period sampling ends. The accelerometer-based intelligent manhole cover monitoring system is successfully activated and enters the normal working mode; when the inclination value of this sampling is not within the activation inclination threshold range, execute step 204;

[0023] Step 204, separately accumulate the number of sampling times when the sampled inclination angle value is not within the activation inclination angle threshold range, obtain the difference sampling times, and determine whether the difference sampling times have accumulated to the allowable times. When the difference sampling times have not accumulated to the allowable times, return to step 202 for the next sampling; when the difference sampling times have accumulated to the allowable times, end the sampling task within this activation time period, the activation of the accelerometer-based intelligent manhole cover monitoring system fails, and enter the sampling judgment process of the next activation time period.

[0024] The above-mentioned accelerometer-based intelligent manhole cover monitoring system sleep and activation method is characterized in that: the activation inclination angle threshold is 0°~10°; the activation sampling time interval is 5min~10min; the activation time period is 1h~12h.

[0025] The above-mentioned method for dormancy and activation of an intelligent manhole cover monitoring system based on an accelerometer is characterized in that: in step 202, sampling is performed once according to the set activation sampling time interval within an activation time period, and the number of samplings is accumulated, and the accelerometer is used to sample data. The microcontroller calculates the corresponding inclination value according to the acceleration value and caches it. The process is: setting a single sampling time and a single sampling time interval, the microcontroller calculates N groups of corresponding inclination values ​​according to the acceleration value, and takes the average of the N groups of corresponding inclination values ​​as the inclination value of this sampling, wherein the single sampling time is 3s~5s, the single sampling time interval is 50ms~100ms, and N is the integer value of the quotient of the single sampling time divided by the single sampling time interval.

[0026] The above-mentioned sleep and activation method of the intelligent manhole cover monitoring system based on accelerometer is characterized in that the integer value of the quotient of the activation time period divided by the activation sampling time interval is the number of activation detection times, and the allowable number is 5% to 10% of the number of activation detection times.

[0027] The above-mentioned method for dormancy and activation of an accelerometer-based smart manhole cover monitoring system is characterized in that: in step 204, after the accelerometer-based smart manhole cover monitoring system is successfully activated, the microcontroller sends status information to the cloud platform through the wireless communication module; when the accelerometer-based smart manhole cover monitoring system fails to be activated, no status information is sent.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] 1. The manhole cover movement intelligent monitoring system of the present invention is generally installed on the back of the urban road manhole cover that needs to be monitored. The installation site environment is complex and diverse. The activation method does not require opening the product shell, and the installation personnel do not need to manually operate external triggering actions such as magnetic steel. Only the system's internal self-detection algorithm performs activation judgment, which simplifies the on-site operation steps.

[0030] 2. The present invention does not require high professional skills of the installers, reduces misoperation and rework, saves time and effort, and converts the activation judgment conditions from external human triggering to internal algorithm solution of the equipment, which can effectively reduce the interference of the on-site environment and the activation failure caused by improper operation of personnel, thereby improving the work efficiency of on-site installers and shortening the project implementation cycle.

[0031] 3. The present invention applies the theoretical concept of edge computing to the activation condition judgment of the intelligent manhole cover monitoring system. The system has a built-in accelerometer, and the data processing algorithm on the platform side is implemented through single-chip computer code programming. Only the final judgment result, that is, whether it is activated, is reported to the cloud platform, reducing the instability of large-scale data sampling for network transmission.

[0032] 4. After the present invention is successfully activated, the system sends activation success status reporting information to the cloud platform wirelessly, and on-site staff can quickly and easily obtain activation status confirmation through the mobile phone applet and service background.

[0033] 5. The present invention improves the convenience of the system's sleep operation both in terms of the production process and user use. It only needs to place the product vertically for more than the set time. For the manhole cover monitoring system that can respond to downlink instructions from the cloud only after data reporting, this sleep mode can be quickly operated in batches, which is greatly efficient, saves time, and reduces production costs.

[0034] 6. After the present invention successfully goes into sleep mode, the system sends a sleep success status report to the cloud platform wirelessly, and production personnel can quickly and easily obtain sleep status confirmation through the mobile app and service background.

[0035] 7. The activation or sleep scheme of the present invention does not require opening the shell, which can effectively avoid affecting the sealing performance of the shell.

[0036] 8. The activation or sleep of the system of the present invention uses the internal accelerometer of the system, which is a material taken from the system itself, and the activation solution has a low cost.

[0037] To summarize, the present invention realizes the functions of automatically activating the normal operation of the system and automatically entering deep sleep through processing and judgment based on accelerometer sampling data. It can realize the batch automatic detection status entering deep sleep mode for the manhole cover movement intelligent monitoring system installed underground or on urban roads before leaving the factory. After installation, manual operation is reduced on site, the system obtains the current status, and the algorithm determines the function of automatically activating and entering the normal working mode, which reduces the time for configuring deep sleep parameters in the production process and improves production efficiency. It does not require users to disassemble and install product batteries or external trigger activation on site, thus avoiding the problem of equipment failure to be activated and reworked due to human factors on site, thereby improving the work efficiency and reliability of the user's on-site installation system and facilitating popularization and use.

[0038] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The figure is a flowchart of the method of the present invention.

[0040] Figure 2 The present invention is a flowchart of a method for the accelerometer-based intelligent manhole cover monitoring system of the present invention to enter a low-power automatic sleep state after leaving the factory.

[0041] Figure 3 The present invention is a flowchart of a method for low-power autonomous activation of an accelerometer-based intelligent manhole cover monitoring system. DETAILED DESCRIPTION

[0042] like Figures 1 to 3 As shown, a sleep and activation method of an intelligent manhole cover monitoring system based on an accelerometer of the present invention comprises the following steps:

[0043] Step 1: The accelerometer-based intelligent manhole cover monitoring system enters a low-power automatic sleep state when it leaves the factory;

[0044] Step 2: Low-power autonomous activation of the intelligent manhole cover monitoring system based on the accelerometer;

[0045] The accelerometer-based intelligent manhole cover monitoring system includes a shell, an electronic circuit board and a power supply battery arranged in the shell, and the electronic circuit board integrates a microcontroller, an accelerometer connected to the microcontroller, and a wireless communication module.

[0046] In this embodiment, in step 1, the process of the accelerometer-based intelligent manhole cover monitoring system entering a low-power automatic sleep state after leaving the factory includes the following steps:

[0047] Step 101, setting a sleep inclination angle threshold and a sleep time threshold for the accelerometer-based intelligent manhole cover monitoring system to enter a low-power automatic sleep state;

[0048] Step 102: the accelerometer identifies whether the current posture of the accelerometer-based intelligent manhole cover monitoring system in the normal working mode has changed. When the microcontroller does not identify the external trigger interrupt of the accelerometer, the accelerometer-based intelligent manhole cover monitoring system continues to be in the normal working mode; when the microcontroller identifies the external trigger interrupt of the accelerometer, step 103 is executed;

[0049] Step 103, sampling the accelerometer data, and resolving the collected acceleration values ​​into inclination values. When the inclination value is not within the dormant inclination threshold range, return to step 102; when the inclination value is within the dormant inclination threshold range, execute step 104;

[0050] Step 104, accumulating the number of sleep detections once, and determining whether the number of sleep detections has accumulated to a preset number of times. When the number of sleep detections has accumulated to a preset number of times, the accelerometer-based intelligent manhole cover monitoring system enters low-power automatic sleep mode; when the number of sleep detections has not accumulated to a preset number of times, executing step 105;

[0051] Step 105, delay once, and return to step 103;

[0052] The product of one delay time and the preset number of times is equal to the sleep time threshold.

[0053] It should be noted that by setting the automatic sleep mode, the manhole cover movement intelligent monitoring system can be placed vertically on the shelf in batches before leaving the factory, and automatically enter the deep sleep mode through the acceleration detection algorithm. In this mode, there is no sensor sampling and timed heartbeat data reporting. The system is in the lowest power consumption and no false triggering or false alarm occurs during transportation. The equipment is directly installed at the project site. After the installation is completed, the equipment can be automatically activated and enter normal working state through the self-detection algorithm.

[0054] In this embodiment, the sleep tilt angle threshold is 60° to 120°; the sleep time threshold is 3 min to 5 min; and the delay time is 10 s to 30 s.

[0055] In this embodiment, in step 104, when the number of sleep detections reaches a preset number, it is confirmed that the system has entered sleep mode, and the microcontroller sends the sleep mode entry information to the cloud platform through the wireless communication module, and then the accelerometer-based intelligent manhole cover monitoring system enters low-power automatic sleep mode; if the accelerometer-based intelligent manhole cover monitoring system fails to sleep mode, it will not send status information. Only the accelerometer sampling and motion detection interrupt response are retained.

[0056] In this embodiment, when the accelerometer-based intelligent manhole cover monitoring system is in a normal working mode, the accelerometer performs inclination data sampling, regular heartbeat information reporting, alarm status detection and information reporting in real time.

[0057] In actual use, the sleep inclination angle threshold can be selected as vertical 85°~90° upward placement, and the sleep time threshold is selected as 3 minutes. If the vertical state is maintained for more than 3 minutes, the process of delaying 20s to detect the inclination angle once is entered. If the inclination angle value is within the range of 85°~90°, the number of times is increased by 1; if the number of recorded times is greater than or equal to 9, that is, each time the system state is detected vertically close to 90° within 3 minutes, the system is enabled to enter sleep mode; if the number of recorded times is less than 9, the sleep mode fails.

[0058] In this embodiment, in step 2, the process of low-power autonomous activation of the accelerometer-based intelligent manhole cover monitoring system includes the following steps:

[0059] Step 201, setting an activation inclination angle threshold, activation sampling time interval and activation time period for low-power autonomous activation of an intelligent manhole cover monitoring system based on an accelerometer;

[0060] Step 202: sampling once according to the set activation sampling time interval within an activation time period, and accumulating the number of samplings, using the accelerometer to sample data, and the microcontroller calculates the corresponding inclination value according to the acceleration value and caches it;

[0061] Step 203, determine whether the inclination value of this sampling is within the activation inclination threshold range. When the inclination value of this sampling is within the activation inclination threshold range, return to step 202 for the next sampling until the activation time period sampling ends. The accelerometer-based intelligent manhole cover monitoring system is successfully activated and enters the normal working mode; when the inclination value of this sampling is not within the activation inclination threshold range, execute step 204;

[0062] Step 204, separately accumulate the number of sampling times when the sampled inclination angle value is not within the activation inclination angle threshold range, obtain the difference sampling times, and determine whether the difference sampling times have accumulated to the allowable times. When the difference sampling times have not accumulated to the allowable times, return to step 202 for the next sampling; when the difference sampling times have accumulated to the allowable times, end the sampling task within this activation time period, the activation of the accelerometer-based intelligent manhole cover monitoring system fails, and enter the sampling judgment process of the next activation time period.

[0063] It should be noted that the automatic activation mode is set, which uses the inclination data sampled and solved by the system's internal accelerometer for algorithm fusion judgment and detection. If the activation conditions are met, the system enters the normal working mode and sends an activation success message to the service platform. If the limited conditions are not met, it remains in deep sleep mode. The activation solution of the manhole cover movement intelligent monitoring system does not require personnel operation at the installation site and has the characteristics of high reliability, simple operation and efficient deployment.

[0064] In this embodiment, the activation tilt angle threshold is 0° to 10°; the activation sampling time interval is 5 min to 10 min; and the activation time period is 1 h to 12 h.

[0065] In this embodiment, in step 202, sampling is performed once according to the set activation sampling time interval within an activation time period, and the number of samplings is accumulated, and the accelerometer is used to sample data. The microcontroller calculates the corresponding inclination value according to the acceleration value and caches it. The process is: setting a single sampling time and a single sampling time interval, the microcontroller calculates N groups of corresponding inclination values ​​according to the acceleration value, and taking the average of the N groups of corresponding inclination values ​​as the inclination value of this sampling, wherein the single sampling time is 3s to 5s, the single sampling time interval is 50ms to 100ms, and N is the integer value of the quotient of the single sampling time divided by the single sampling time interval.

[0066] In this embodiment, the integer value of the quotient of the activation time period divided by the activation sampling time interval is the number of activation detection times, and the allowable number of times is 5% to 10% of the number of activation detection times.

[0067] It should be noted that the purpose of setting the allowable number of times is to avoid the system from stopping activation in the event of unexpected abnormalities, and to allow for minor disturbances that have a small impact on the system.

[0068] In this embodiment, in step 204, after the accelerometer-based smart manhole cover monitoring system is successfully activated, the microcontroller sends status information to the cloud platform through the wireless communication module; when the accelerometer-based smart manhole cover monitoring system fails to be activated, no status information is sent. If you still cannot receive the activation success message, please check whether the SIM card status and the local network status are normal.

[0069] When the present invention is used, the manhole cover movement intelligent monitoring system is generally installed on the back of the urban road manhole cover that needs to be monitored. The installation site environment is complex and diverse. The activation method does not require opening the product shell, and does not require the installation personnel to manually operate external triggering actions such as magnetic steel. Only the system's internal self-detection algorithm performs activation judgment, which simplifies the on-site operation steps; it does not require high professional skills of the installers, reduces misoperation and rework, saves time and effort, and converts the activation judgment conditions from external manual triggers to internal algorithm solutions of the equipment, which can effectively reduce on-site environmental interference and activation failure problems caused by irregular personnel operations, thereby improving the work efficiency of on-site installers and shortening the project implementation cycle; the theoretical concept of edge computing is applied to the activation condition judgment of the intelligent manhole cover monitoring system, the system has a built-in accelerometer, and the data processing algorithm on the platform side is implemented through single-chip microcomputer code programming, and only the final judgment result, that is, whether it is activated, is reported to the cloud platform, reducing a large amount of data sampling for network Instability of transmission; after successful activation, the system sends activation success status report information to the cloud platform wirelessly, and on-site staff can quickly and easily obtain activation status confirmation through mobile applets and service background; the convenience of the system's dormant operation has been improved both in terms of production process and user use. It only needs to place the product vertically for more than the set time. For the manhole cover monitoring system that can only respond to downlink instructions from the cloud after data reporting, this dormant mode can be quickly operated in batches, with greatly improved efficiency, saving time and reducing production costs; after successful dormancy, the system sends dormancy success status report information to the cloud platform wirelessly, and production personnel can quickly and easily obtain dormancy status confirmation through mobile applets and service background; this activation or dormancy solution does not require opening the shell, which can effectively avoid affecting the sealing of the shell; the system uses the system's internal accelerometer for activation or dormancy, which is the system's own material, and the activation solution has a low cost.

[0070] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A dormancy and activation method for an intelligent manhole cover monitoring system based on an accelerometer, characterized in that: The method comprises the following steps: Step 1: The accelerometer-based intelligent manhole cover monitoring system enters a low-power automatic sleep state when it leaves the factory; Step 2: Low-power autonomous activation of the intelligent manhole cover monitoring system based on the accelerometer; The accelerometer-based intelligent manhole cover monitoring system includes a shell, an electronic circuit board and a power supply battery arranged in the shell, and the electronic circuit board integrates a microcontroller, an accelerometer connected to the microcontroller, and a wireless communication module.

2. A dormancy and activation method for an intelligent manhole cover monitoring system based on an accelerometer according to claim 1, characterized in that: In step 1, the process of the accelerometer-based intelligent manhole cover monitoring system entering a low-power automatic sleep state after leaving the factory includes the following steps: Step 101, setting a sleep inclination angle threshold and a sleep time threshold for the accelerometer-based intelligent manhole cover monitoring system to enter a low-power automatic sleep state; Step 102: the accelerometer identifies whether the current posture of the accelerometer-based intelligent manhole cover monitoring system in the normal working mode has changed. When the microcontroller does not identify the external trigger interrupt of the accelerometer, the accelerometer-based intelligent manhole cover monitoring system continues to be in the normal working mode; when the microcontroller identifies the external trigger interrupt of the accelerometer, step 103 is executed; Step 103, sampling the accelerometer data, and resolving the collected acceleration values ​​into inclination values. When the inclination value is not within the dormant inclination threshold range, return to step 102; when the inclination value is within the dormant inclination threshold range, execute step 104; Step 104, accumulating the number of sleep detections once, and determining whether the number of sleep detections has accumulated to a preset number of times. When the number of sleep detections has accumulated to a preset number of times, the accelerometer-based intelligent manhole cover monitoring system enters low-power automatic sleep mode; when the number of sleep detections has not accumulated to a preset number of times, executing step 105; Step 105, delay once, and return to step 103; The product of one delay time and the preset number of times is equal to the sleep time threshold.

3. A dormancy and activation method for an intelligent manhole cover monitoring system based on an accelerometer according to claim 2, characterized in that: The sleep tilt angle threshold is 60° to 120°; the sleep time threshold is 3min to 5min; and the delay time is 10s to 30s.

4. The method for sleeping and activating an intelligent manhole cover monitoring system based on an accelerometer according to claim 2, characterized in that: In step 104, when the number of sleep detections reaches a preset number, it is confirmed that the system has entered sleep mode, and the microcontroller sends the sleep mode entry information to the cloud platform through the wireless communication module. After that, the accelerometer-based smart manhole cover monitoring system enters low-power automatic sleep mode. If the accelerometer-based smart manhole cover monitoring system fails to enter sleep mode, no status information will be sent.

5. The sleep and activation method of the intelligent manhole cover monitoring system based on accelerometer according to claim 2, characterized in that: When the accelerometer-based intelligent manhole cover monitoring system is in a normal working mode, the accelerometer performs inclination data sampling, regular heartbeat information reporting, alarm status detection and information reporting in real time.

6. A dormancy and activation method for an intelligent manhole cover monitoring system based on an accelerometer according to claim 1 or 2, characterized in that: In step 2, the process of low-power autonomous activation of the accelerometer-based intelligent manhole cover monitoring system includes the following steps: Step 201, setting an activation inclination angle threshold, activation sampling time interval and activation time period for low-power autonomous activation of an intelligent manhole cover monitoring system based on an accelerometer; Step 202: sampling once according to the set activation sampling time interval within an activation time period, and accumulating the number of samplings, using the accelerometer to sample data, and the microcontroller calculates the corresponding inclination value according to the acceleration value and caches it; Step 203, determine whether the inclination value of this sampling is within the activation inclination threshold range. When the inclination value of this sampling is within the activation inclination threshold range, return to step 202 for the next sampling until the activation time period sampling ends. The accelerometer-based intelligent manhole cover monitoring system is successfully activated and enters the normal working mode; when the inclination value of this sampling is not within the activation inclination threshold range, execute step 204; Step 204, separately accumulate the number of sampling times when the sampled inclination angle value is not within the activation inclination angle threshold range, obtain the difference sampling times, and determine whether the difference sampling times have accumulated to the allowable times. When the difference sampling times have not accumulated to the allowable times, return to step 202 for the next sampling; when the difference sampling times have accumulated to the allowable times, end the sampling task within this activation time period, the activation of the accelerometer-based intelligent manhole cover monitoring system fails, and enter the sampling judgment process of the next activation time period.

7. A dormancy and activation method for an intelligent manhole cover monitoring system based on an accelerometer according to claim 6, characterized in that: The activation tilt angle threshold is 0° to 10°; the activation sampling time interval is 5min to 10min; and the activation time period is 1h to 12h.

8. The method for dormancy and activation of an intelligent manhole cover monitoring system based on an accelerometer according to claim 6, characterized in that: In step 202, the process of sampling once according to the set activation sampling time interval within an activation time period, accumulating the number of samplings, using the accelerometer to sample data, and the microcontroller calculating the corresponding inclination value according to the acceleration value and caching it is as follows: setting a single sampling time and a single sampling time interval, the microcontroller calculating N groups of corresponding inclination values ​​according to the acceleration value, and taking the average of the N groups of corresponding inclination values ​​as the inclination value of this sampling, wherein the single sampling time is 3s to 5s, the single sampling time interval is 50ms to 100ms, and N is the integer value of the quotient of the single sampling time divided by the single sampling time interval.

9. The method for sleeping and activating an intelligent manhole cover monitoring system based on an accelerometer according to claim 6, characterized in that: The integer value of the quotient of the activation time period divided by the activation sampling time interval is the activation detection times, and the allowable times is 5% to 10% of the activation detection times.

10. The method for dormancy and activation of an intelligent manhole cover monitoring system based on an accelerometer according to claim 6, characterized in that: In step 204, after the accelerometer-based smart manhole cover monitoring system is successfully activated, the microcontroller sends status information to the cloud platform through the wireless communication module; when the accelerometer-based smart manhole cover monitoring system fails to be activated, no status information is sent.

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