CN115240392B - An automatic detection system for alarm probe failure - Google Patents

Abstract

The invention relates to the technical field of failure detection, and discloses an automatic detection system for alarm probe failure, which includes a management platform center, a comprehensive collection host, and a collection device; the management platform center is communicatively connected to the comprehensive collection host, and the comprehensive collection host is communicatively connected to the collection device; The acquisition device includes a signal acquisition module, an A/D conversion module, a main control module, a communication module, and a power supply module. The main control module is connected to the signal acquisition module through the A/D conversion module, and the main control module is connected to the comprehensive acquisition host through the communication module. The module also connects to the power supply module. In the alarm probe failure automatic detection system provided by the present invention, the collection device collects the pulse signal or switching signal triggered by the probe from the alarm probe to determine whether the alarm probe has failed, and then transmits the judgment result to the comprehensive collection host and management platform center without manual labor. Triggering the alarm to determine whether the alarm probe is effective saves labor costs and improves detection accuracy.

Description

An automatic detection system for alarm probe failure

Technical field

The invention relates to the technical field of failure detection, and in particular to an automatic detection system for alarm probe failure.

Background technique

At present, the detection of alarm probes is usually through the alarm host management software or monitoring platform, and the alarm signals of all the probes received are manually screened and analyzed afterwards. The shortcomings of the plan of post-analysis of the alarm signals received by the platform are that the platform Located behind the alarm host, it cannot truly detect the status of the probe. Once the alarm host itself fails or bypasses the defense zone, the probe signal will not be received at all. The detection of the alarm probe can also be done by arranging people to manually trigger the alarm within the detection range of the alarm probe, and then go to the management platform to check whether the alarm signal is received, so as to detect whether the probe is effective. The disadvantages of manually triggering the alarm detection solution are: The labor cost is too high, the detection cycle has to be longer (for example, once a month), and some sensitive areas cannot be entered at any time, making it easy to miss inspections. The alarm probe can also be detected by simulating the signal triggered by the probe. The problem is that the sensor of the probe may be damaged. Even if the analog signal can be transmitted to the alarm host, the probe cannot actually be used. The alarm host It can self-check whether the defense zone is working normally, but it cannot detect whether the probe is normal.

Contents of the invention

The invention provides an automatic detection system for alarm probe failure. The acquisition device collects the pulse signal or switch signal triggered by the probe from the alarm probe to determine whether the alarm probe has failed, and then transmits the judgment result to the comprehensive collection host and management platform center. There is no need to manually trigger the alarm to determine whether the alarm probe is effective, saving labor costs and improving detection accuracy.

The invention provides an automatic alarm probe failure detection system, which includes a management platform center, a comprehensive collection host, and a collection device; the management platform center is communicatively connected with the comprehensive collection host, and the comprehensive collection host communicates with the collection device Connection; the acquisition device includes a signal acquisition module, an A/D conversion module, a main control module, a communication module, and a power supply module. The main control module is connected to the signal acquisition module through the A/D conversion module. The main control module is connected to the signal acquisition module through the A/D conversion module. The control module is connected to the comprehensive acquisition host through the communication module, and the main control module is also connected to the power module;

The signal acquisition module is used to collect pulse signals or switching signals triggered by multiple alarm probes, and determine whether the corresponding alarm probe is invalid based on the pulse signals and switching signals;

The A/D conversion module is used to convert the collected pulse signal or switching signal from an analog signal to a digital signal;

The communication module uses a CAN controller built into the CPU to transmit the converted pulse signal or switching signal to the comprehensive acquisition host;

The power module is used to supply power to the collection device;

The comprehensive acquisition host is used to receive the pulse signals, switching signals transmitted by the acquisition device and the detection results of the corresponding alarm probes, and at the same time establish an alarm probe failure table, and record the detection results of all alarm probes into the alarm In the probe failure table; wherein, the number, specific location, historical detection data and failure data of the alarm probe are recorded in the probe failure table;

The management platform center is used to receive the alarm probe failure table transmitted by the comprehensive collection host, and extract the failure data as the numbers of all failed alarm probes, and divide the warning area according to the specific positions corresponding to the numbers of all failed alarm probes, and according to the The warning area sends repair information to the management personnel corresponding to the warning area; wherein the repair information includes the numbers of all failed alarm probes in the corresponding area, historical detection data, failure data, and simulated position model diagrams obtained based on specific locations. .

Further, it also includes an isolation module. The main control module is connected to the A/D conversion module through the isolation module. The isolation module is used for electrical connection between the A/D conversion module and the main control module. Isolation, digital isolation chip ADUM4401 is used to achieve isolated communication.

Further, it also includes a plurality of indicator lights connected to the main control module, and the plurality of indicator lights respectively correspond to multiple warning areas, wherein one indicator light corresponds to a unique warning area, and each indicator light corresponds to a unique warning area. When the number of failed alarm probes in the corresponding warning area of the lamp exceeds the set value, the red light will light up to remind the corresponding manager of the warning area; the number of failed alarm probes in the corresponding warning area of each indicator light does not exceed the set value. When the value is set, the green light lights up to indicate that the corresponding warning area is operating normally.

Furthermore, it also includes a timing module, which is connected to the signal acquisition module. The timing module has a preset time period. When the acquisition device is started, the timing module starts timing. When the node of the preset time period is reached, the acquisition device triggers a signal to be transmitted to the comprehensive acquisition host through the communication module, indicating that the alarm probe is operating normally.

Further, when the timing module starts timing, if the pulse signal or switching signal from the alarm probe is collected, the timing time is reset to zero and the next preset time period is restarted.

Further, it also includes a positioning device, the positioning device is connected to the collection device and the comprehensive collection host, the positioning device is used to receive the detection result of the alarm probe transmitted by the collection device, and when the detection result is invalid , start the positioning device to locate the failed alarm probe to determine the specific location of the failed alarm probe, and transmit the specific location to the comprehensive collection host.

Further, the positioning device includes a detection module, a microcontroller, an analysis module and a network module. The microcontroller is connected to the detection module, the analysis module and the network module respectively. The network module is connected to the collection device and the network module respectively. Comprehensive acquisition host, the detection module is used to perform near-field scanning of the alarm probe, the analysis module is used to inject signal values into the alarm probe and analyze the signals generated by the scanning of the detection module, and the microcontroller is used to The electromagnetic field information of the alarm probe is determined based on the scan data obtained by the detection module, the distribution of the alarm probe is obtained based on the electromagnetic field information, and the specific location of the alarm probe is determined based on the distribution.

The beneficial effects of the present invention are:

The acquisition module of the acquisition device collects pulse signals or switching signals triggered by multiple alarm probes, and determines whether the corresponding alarm probe is invalid based on the pulse signals and switching signals. The detection results of the alarm probes are transmitted to the integrated system through the communication module. The collection host and the comprehensive collection host establish an alarm probe failure table, and record the detection results of all alarm probes into the alarm probe failure table. The probe failure table records the number, specific location, historical detection data and failure data of the alarm probe, realizing Unified management of all alarm probes facilitates the subsequent extraction and analysis of historical detection data of alarm probes, and determines the specific location of alarm probes for management personnel to inspect and repair; the comprehensive acquisition host transmits the alarm probe failure table to the management platform center to facilitate The management platform center can remotely monitor the real-time status of alarm probes without the need for on-site inspection. At the same time, it is easy to send repair information to the corresponding managers based on the alarm probe failure table, which includes the numbers and historical detection data of all failed alarm probes in the corresponding area. , failure data, and simulated position model diagrams obtained based on specific locations, so that managers can quickly find the location of the failed alarm probe and quickly obtain the failure status of the alarm probe; there is no need to manually trigger the alarm to determine whether the alarm probe is valid. This saves labor costs and improves detection accuracy.

Description of drawings

Figure 1 is a schematic structural diagram of the automatic alarm probe failure detection system of the present invention.

Figure 2 is a schematic structural diagram of the collection device in the present invention.

Figure 3 is a schematic structural diagram of the positioning device in the present invention.

The realization of the purpose, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiment of the present invention are only used to explain the relationship between components in a specific posture (as shown in the drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

In addition, descriptions involving "first", "second", etc. in the present invention are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor within the protection scope required by the present invention.

It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

As shown in Figure 1, the present invention provides an automatic detection system for alarm probe failure, including a management platform center, a comprehensive collection host, and a collection device; the management platform center is communicatively connected to the comprehensive collection host, and the comprehensive collection host Communicatively connected to the acquisition device; the acquisition device includes a signal acquisition module, an A/D conversion module, a main control module, a communication module, and a power supply module. The main control module connects to the signal through the A/D conversion module. Collection module, the main control module is connected to the comprehensive collection host through the communication module, and the main control module is also connected to the power module;

The signal acquisition module is used to collect pulse signals or switching signals triggered by multiple alarm probes, and determine whether the corresponding alarm probe is invalid based on the pulse signals and switching signals;

The A/D conversion module is used to convert the collected pulse signal or switching signal from an analog signal to a digital signal;

The communication module uses a CAN controller built into the CPU to transmit the converted pulse signal or switching signal to the comprehensive acquisition host;

The power module is used to supply power to the collection device;

The comprehensive acquisition host is used to receive the pulse signals, switching signals transmitted by the acquisition device and the detection results of the corresponding alarm probes, and at the same time establish an alarm probe failure table, and record the detection results of all alarm probes into the alarm In the probe failure table; wherein, the number, specific location, historical detection data and failure data of the alarm probe are recorded in the probe failure table;

The management platform center is used to receive the alarm probe failure table transmitted by the comprehensive collection host, extract the failure data as the numbers of all failed alarm probes, divide the warning area according to the specific positions corresponding to the numbers of all failed alarm probes, and divide the warning area according to the The warning area sends repair information to the management personnel corresponding to the warning area; wherein the repair information includes the numbers of all failed alarm probes in the corresponding area, historical detection data, failure data, and simulated position model diagrams obtained based on specific locations. .

As mentioned above, the alarm probe failure automatic detection system includes a management platform center, a comprehensive collection host, a collection device, and a positioning device. The comprehensive collection host is connected to the collection device, positioning device, and management platform center respectively. The comprehensive collection host serves as a transfer station for receiving Collect the detection information of the device and positioning device, integrate the detection information and transmit it to the management platform center, so that the monitoring personnel can intuitively view the specific conditions of the alarm probe.

As shown in Figure 2, Figure 2 shows a schematic structural diagram of the collection device. The acquisition device includes a signal acquisition module, an A/D conversion module, an isolation module, a main control module, a communication module, and a power supply module. The main control module is connected to the isolation module, the communication module, and the power supply module respectively. The isolation module is also connected to the A/D conversion module. The A/D conversion module is also connected to the signal acquisition module, and the communication module is also connected to the comprehensive acquisition host.

The signal acquisition module is used to collect pulse signals or switching signals triggered by multiple alarm probes, and determine whether the corresponding alarm probe has failed based on the pulse signals and switching signals. When detecting switching signals, according to system needs, a total of 16 switching signal inputs can be set, and accordingly 16 switching input channels are required. Each channel consists of two parts: sampling and self-test. The sampling part uses the principle of resistor voltage division to adjust the input signal level to the A/D conversion input range; the self-test part uses the CPU to timely control the analog switch to connect the 12V voltage to the sampling circuit.

The A/D conversion module is used to convert the collected pulse signals or switching signals from analog signals into digital signals. The A/D conversion chip model selected is AD7194, a 24-bit Σ-Δ analog-to-digital converter (ADC), with a power supply voltage of 3.00~5.25V, an on-chip 4.92MHz clock source, and can be configured as 8 differential inputs or 16 differential inputs. Single-ended input, very suitable for high-precision measurement applications; it has a 4-wire SPI interface to achieve high-speed data communication with the CPU. In order to improve the test accuracy, the highly stable voltage reference LTC6655 is selected. The reference output voltage is 4.096V, the initial accuracy is 0.05%, and the temperature drift is 5ppm/°C.

The communication module is used to transmit the converted pulse signal or switch signal to the comprehensive acquisition host. The communication module is CAN communication with isolation function, using the CAN controller built into the CPU, and the external chip uses the LTM2889 transceiver to achieve isolation of CAN communication. The LTM2889 has an internal isolated power supply to simplify power supply design, and the effective isolation voltage is 2.5kV.

The power module is used to power the collection device. For example, the voltage required by the system is 3.3V and 5V. 3.3V is the voltage required by the chip STM32F437, and 5.0V is the voltage required by the switching signal sampling part. Due to the need to measure current consumption and suppress startup surge current, a sampling resistor and a hot-swap control circuit are added. The chip LM22670-5.0 can be used to achieve 24V to 5.0V conversion, and the chip MPM3810-3.3 can be used to achieve 5.0V to 3.3V conversion to provide power supply for the CPU and its peripheral configuration circuits. The switching signal detection part needs to be electrically isolated from the CPU part, and the isolated power module MDHU124 can be used to achieve a 12V voltage output isolated from the input. Since the switching signal detection part requires less power, in order to reduce the printed board area, the chip TPS7A6950 can be used to convert the voltage from 12V to 5.0V.

The main control module is composed of CPU and other functional chips. The CPU model is STM32F437, which has an ARM32-bitCortex ^TM -M4 core, 2 CAN controllers, 3 SPI interfaces, and 2 I2C interfaces; other functional chips include FRAM and analog detection chips. FRAM is used to store key parameters. FLASH is used to store abnormal signals.

The comprehensive acquisition host is used to receive the pulse signals, switching signals transmitted by the acquisition device and the detection results of the corresponding alarm probes, and at the same time establish an alarm probe failure table, and record the detection results of all alarm probes into the alarm probe failure table; where , the probe failure table records the number, specific location, historical detection data and failure data of the alarm probe. Number all alarm probes that need to be detected. Each alarm probe has a unique number. The number helps manage a large number of alarm probes. You can set a record in the alarm probe failure table to represent the situation of an alarm probe. The fields are alarm The number, specific location, historical detection data and failure data of the probe. The failure data includes two conditions: normal and failure, indicating the current detection results of the alarm probe.

The management platform center is used to receive the alarm probe failure table transmitted by the comprehensive collection host, and extract the failure data as the numbers of all failed alarm probes, divide the warning areas according to the specific positions of all the failed alarm probe numbers, and map the warning areas to the warning areas. The management personnel send repair information; the repair information includes the numbers of all failed alarm probes in the corresponding area, historical detection data, failure data, and simulated position model diagrams based on specific locations. The management platform center extracts the numbers of all failed alarm probes based on the alarm probe failure table to form the current failure table, and obtains the locations of all failed alarm probes based on the alarm probe numbers, and then can divide the warning area according to the location, that is, a warning area The distance between alarm probes is within the set range, or the warning area is determined according to the administrative division, so that repair information can be sent to the corresponding management personnel of the warning area. The management personnel of multiple warning areas can start the repair process at the same time, shortening the time of all alarm probes. Repair time is improved, and efficiency is improved; repair information is sent to the corresponding manager of the warning area; the repair information includes the numbers of all failed alarm probes in the corresponding area, historical detection data, failure data, and simulated position models based on specific locations. Figure (Establish a structural model of the installation location of the alarm probe in advance, and set the location of the alarm probe. When the alarm probe fails, the alarm probe in the model can be directly lit, so that managers can directly see the location without looking for it on the map. Improve efficiency), which facilitates managers to quickly find the corresponding alarm probe based on the repair information and improves repair efficiency.

The collection device of the present invention collects the pulse signal or switching signal triggered by the probe from the alarm probe to determine whether the alarm probe is invalid, and then transmits the determination result to the comprehensive collection host and management platform center, eliminating the need to manually trigger the alarm to determine whether the alarm probe is effective. , saving labor costs and improving detection accuracy.

In one embodiment, an isolation module is further included. The main control module is connected to the A/D conversion module through the isolation module. The isolation module is used between the A/D conversion module and the main control module. Electrical isolation is done between them, and the digital isolation chip ADUM4401 is used to achieve isolated communication.

As mentioned above, the isolation module electrically isolates the A/D conversion module and the CPU (main control module), and uses a digital isolation chip to realize digital communication between the two. The digital isolation chip model is ADUM4401, the power supply range is 3.0~5.5V, 3+1 logic direction, and the effective isolation voltage is 5kV. One ADU4401 is used to realize the SPI isolated communication between the A/D and the CPU, and another ADU4401 is used to realize the output of the CPU self-test control signal.

In one embodiment, it also includes multiple indicator lights, the multiple indicator lights are connected to the main control module, the multiple indicator lights correspond to multiple warning areas, wherein one indicator light corresponds to only one warning area, When the number of failed alarm probes of each indicator light in its corresponding warning area exceeds the set value, a red light will light up to remind the corresponding manager of the warning area; the number of failed alarm probes of each indicator light in its corresponding warning area When the set value is not exceeded, the green light turns on to indicate that the corresponding warning area is operating normally.

As mentioned above, multiple indicator lights are connected to the main control module. The number of indicator lights can be set to be the same as the number of warning areas. Each indicator light represents a warning area. The color of the indicator light can be set to red or green, with red indicating a warning. There are too many failed alarm probes in the area. Green indicates that the alarm probes in the warning area are operating normally; judging whether the warning area is operating normally can be judged by judging that the number of failed alarm probes in the warning area exceeds the set value (can be set to 1/2 of the total number). , it can also be adjusted according to specific circumstances, and is not limited here). When the number of failed alarm probes in the warning area exceeds the set value, it means that the warning area is not operating normally; when the number of failed alarm probes in the warning area does not exceed the set value. When the value is high, it means that the warning area is operating normally.

In one embodiment, a timing module is also included. The timing module is connected to the signal acquisition module. The timing module has a preset time period. When the acquisition device is started, the timing module starts timing. When the predetermined time period is reached, the timing module starts timing. When the node of the time period is set, the collection device triggers a signal to be transmitted to the comprehensive collection host through the communication module, indicating that the alarm probe is operating normally.

As mentioned above, the timing module is connected to the signal acquisition module. The timing module has a preset time period and is used to regularly transmit the collected signals and the failure status of the alarm probe to the comprehensive acquisition host; when the acquisition device is started, the timing module starts timing. When the first set time period is reached, the acquisition device triggers a signal to be transmitted to the comprehensive acquisition host through the communication module in order to transmit the collected signal and the obtained alarm probe failure situation. For example, if the preset time period is set to 10 minutes and the start time of the collection device is 8:00, then at 8:10, the collection device triggers a signal and transmits it to the comprehensive collection host through the communication module, and then restarts the timing of the preset time period. That is, at 8:20, the collection device triggers another signal and transmits it to the comprehensive collection host through the communication module, and so on until the collection device stops working.

In one embodiment, when the timing module starts timing, if a pulse signal or a switch signal from the alarm probe is collected, the timing time is reset to zero and the next preset time period is restarted.

As mentioned above, when the timing module starts timing, if the pulse signal or switching signal from the alarm probe is collected, the timing time will be reset to zero and the next preset time period will be restarted. That is, set the preset time period to 10 minutes, and the starting time of the acquisition device is 8:00. When the pulse signal or switching signal from the alarm probe is collected at 8:03, the acquisition device triggers a signal to be transmitted through the communication module. to the comprehensive acquisition host in order to transmit the collected signals and the failure status of the alarm probe, then reset the timing time to zero and restart the next preset time period, that is, start timing from 8:03, and collect at 8:13 The device triggers a signal and transmits it to the comprehensive collection host through the communication module, and so on until the collection device stops working.

In one embodiment, it also includes a positioning device connected to the collection device and the comprehensive collection host. The positioning device is used to receive the detection results of the alarm probe transmitted by the collection device, and when the detection results When it fails, the positioning device is started to locate the failed alarm probe to determine the specific location of the failed alarm probe, and the specific location is transmitted to the comprehensive collection host.

As mentioned above, it also includes a positioning device. The positioning device is connected to the collection device and the comprehensive collection host. When the detection result of the alarm probe output by the collection device is invalid, the positioning device starts to locate the failed alarm probe to determine the location of the failed alarm probe. specific location, and transmit the specific location to the comprehensive collection host, so that the comprehensive collection host can integrate a large number of locations and transmit them to the management platform center, so that the corresponding management personnel can quickly find and Repair the alarm probe.

In one embodiment, the positioning device includes a detection module, a microcontroller, an analysis module and a network module. The microcontroller is connected to the detection module, the analysis module and the network module respectively. The network module is connected to the Acquisition device and comprehensive acquisition host, the detection module is used to perform near-field scanning of the alarm probe, the analysis module is used to inject signal values into the alarm probe and analyze the signals generated by scanning of the detection module, and the micro The controller is configured to determine the electromagnetic field information of the alarm probe based on the scanning data obtained by the detection module, obtain the distribution of the alarm probe based on the electromagnetic field information, and then determine the specific location of the alarm probe based on the distribution.

As mentioned above, as shown in Figure 3, Figure 3 shows a schematic structural diagram of the positioning device. The positioning device includes a detection module, a microcontroller, an analysis module and a network module. The network module is used to receive the information transmitted by the collection device and transmit the obtained position information to the comprehensive collection host; the positioning method of the positioning device is: the detection module performs Calibration obtains calibration data (using computer simulation methods such as HFSS simulation to obtain electromagnetic field information of the calibration device at the target height plane). The detection module scans the alarm probe to obtain parameter information. When the analysis module obtains the electrical signal of the detection module, it can be analyzed Obtain parameter information. The parameter information is used to characterize the electromagnetic field information of the alarm probe scanning height plane. According to the parameter information and calibration data, the electromagnetic field information of the alarm probe target height plane is determined. The distribution of the alarm probe surface is determined based on the electromagnetic field information of the alarm probe target height plane. The distribution can include the location distribution of surface current density and/or surface charge distribution. Finally, the failure location of the alarm probe is determined based on the distribution on the surface of the alarm probe. Based on the principle of electromagnetic injection and detection, combined with the electromagnetic field information of the alarm probe, the failure location of the alarm probe is analyzed. The cost is low, there is no need to destroy the alarm probe, and the reliability is high.

It should be noted that, in this document, the terms "include", "comprises" or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, device, article or method that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, apparatus, article or method. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, apparatus, article or method that includes that element.

The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied to other related The technical fields are all equally included in the scope of patent protection of the present invention.

Claims (5)

1. The automatic alarm probe failure detection system is characterized by comprising a management platform center, a comprehensive acquisition host, an acquisition device and a positioning device; the management platform center is in communication connection with the comprehensive acquisition host, and the comprehensive acquisition host is in communication connection with the acquisition device; the acquisition device comprises a signal acquisition module, an A/D conversion module, a main control module, a communication module and a power supply module, wherein the main control module is connected with the signal acquisition module through the A/D conversion module, is connected with the comprehensive acquisition host through the communication module, and is also connected with the power supply module; the positioning device is connected with the acquisition device and the comprehensive acquisition host;

the signal acquisition module is used for acquiring pulse quantity signals or switching value signals triggered by a plurality of alarm probes and judging whether the corresponding alarm probes fail according to the pulse quantity signals and the switching value signals; setting 16 paths of switching value signal inputs in total, and requiring 16 paths of switching value input channels, wherein each channel consists of two parts of sampling and self-checking, and the sampling part adjusts the input signal level to be within an A/D conversion input range by utilizing a resistor voltage division principle; the self-checking part is used for timely controlling the analog switch to switch the 12V voltage into the sampling circuit by the CPU;

the A/D conversion module is used for converting the acquired pulse quantity signal or switching value signal from an analog signal to a digital signal;

the communication module adopts a CAN controller which is arranged in a CPU and is used for transmitting the converted pulse quantity signal or switching value signal to the comprehensive acquisition host;

the power supply module is used for supplying power to the acquisition device;

the comprehensive acquisition host is used for receiving pulse quantity signals, switching value signals and detection results of corresponding alarm probes transmitted by the acquisition device, establishing an alarm probe failure table at the same time, and recording detection results of all alarm probes into the alarm probe failure table; the probe failure table records the number, the specific position, the historical detection data and the failure data of the alarm probe;

the management platform center is used for receiving the alarm probe failure table transmitted by the comprehensive acquisition host, extracting all alarm probe numbers with failure data as failures, dividing an alarm area according to specific positions corresponding to all the failed alarm probe numbers, and sending repair information to management personnel corresponding to the alarm area according to the alarm area; the repair information comprises serial numbers of all failed alarm probes of the corresponding area, historical detection data, failure data and a simulation position model diagram obtained according to specific positions; the management platform center extracts all failed alarm probe numbers according to the alarm probe failure table to form a current failure table, and obtains the positions of all failed alarm probes according to the numbers of the alarm probes, so that an alarm area can be divided according to the positions, namely the distance between the alarm probes of one alarm area is within a set range, or the alarm area is determined according to administrative division, so that repair information can be conveniently sent to management personnel corresponding to the alarm area;

the positioning device is used for receiving the detection result of the alarm probe transmitted by the acquisition device, starting the positioning device to position the failed alarm probe to determine the specific position of the failed alarm probe when the detection result is failure, and transmitting the specific position to the comprehensive acquisition host; the positioning device comprises a detection module, a microcontroller, an analysis module and a network module, wherein the microcontroller is respectively connected with the detection module, the analysis module and the network module, the network module is respectively connected with the acquisition device and the comprehensive acquisition host, the detection module is used for performing near-field scanning on the alarm probe, the analysis module is used for injecting signals into the alarm probe and analyzing signals generated by scanning of the detection module, the microcontroller is used for determining electromagnetic field information of the alarm probe according to scanning data acquired by the detection module, obtaining distribution conditions of the alarm probe according to the electromagnetic field information, and further determining specific positions of the alarm probe according to the distribution conditions.

2. The automatic alarm probe failure detection system according to claim 1, further comprising an isolation module, wherein the main control module is connected with the a/D conversion module through the isolation module, the isolation module is used for electrically isolating the a/D conversion module from the main control module, and the digital isolation chip ADUM4401 is used for realizing isolation communication.

3. The automatic alarm probe failure detection system according to claim 1, further comprising a plurality of indicator lamps, wherein the indicator lamps are connected with the main control module, the indicator lamps respectively correspond to a plurality of alarm areas, wherein one indicator lamp corresponds to only one alarm area, and when the alarm probe failure number of the corresponding alarm area exceeds a set value, each indicator lamp lights a red lamp to prompt a manager corresponding to the alarm area; and when the failure number of the alarm probes of the corresponding alarm areas of each indicator lamp does not exceed the set value, the green light is turned on to indicate that the corresponding alarm areas work normally.

4. The automatic alarm probe failure detection system according to claim 1, further comprising a timing module, wherein the timing module is connected to the signal acquisition module, the timing module has a preset time period, when the acquisition device is started, the timing module starts timing, and when a node of the preset time period is reached, the acquisition device triggers a signal to be transmitted to the comprehensive acquisition host through the communication module, so that the alarm probe is indicated to operate normally.

5. The automatic alarm probe failure detection system according to claim 4, wherein when the timer module starts to count, if a pulse signal or a switching value signal from the alarm probe is acquired, the counted time is zeroed, and the next preset time period is restarted.