Grading alarm system of mining intrinsic safety type laser methane sensor
By introducing a graded alarm system into the mine methane sensor, using colored lights and sounds to indicate different states, the problem of alarms being easily ignored and falsely triggered in the existing technology is solved, and accurate feedback on the underground environment and rapid fault location are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-04-03
AI Technical Summary
The alarm systems of intrinsically safe methane sensors used in mines generally use a single threshold to trigger alarms, which are easily overlooked and have a high probability of false triggering in complex environments. They are difficult to distinguish between sensor failure and environmental exceedances, lack intuitive feedback, and result in low maintenance efficiency.
A hierarchical alarm system is adopted, which combines a main controller with a color alarm light module, a buzzer module and a display module. Different colored lights and sounds indicate different states, and the status is displayed on the display interface to identify the normal status, fault status and methane concentration exceeding the standard status of the sensor.
It enables accurate prompts for different states, reduces environmental misjudgments, shortens maintenance time, and improves downhole safety and maintenance efficiency.
Smart Images
Figure CN224082072U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of methane sensor alarm technology, specifically to a graded alarm system for an intrinsically safe laser methane sensor for mining applications. Background Technology
[0002] Currently, alarm systems for intrinsically safe methane sensors used in mines generally employ a single threshold trigger. By setting a methane concentration threshold, an alarm is triggered by a buzzer when the concentration exceeds the set value, providing feedback on the emergency state of "methane concentration exceeding the limit." However, due to the noise from underground work, the alarm sound is easily overlooked, resulting in poor alarm effectiveness. Furthermore, it cannot distinguish between "sensor malfunction" and "excessive ambient methane levels," requiring maintenance personnel to conduct additional investigations into issues such as abnormal power supply, component aging, or dust interference, thus delaying processing efficiency.
[0003] Secondly, in complex downhole environments such as those with electromagnetic interference and dust accumulation, the probability of sensors falsely triggering alarms is relatively high. A single alarm mode can easily lead to operator fatigue or overlooking real risks. In particular, when the red light alarm is damaged, it can easily be confused with normal concentration conditions, resulting in warnings of excessive methane concentrations not being detected in time. Moreover, relying solely on buzzers or red light alarms lacks intuitive multi-state feedback, making it difficult to quickly pinpoint the root cause of the problem. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model proposes the following technical solution:
[0005] This utility model embodiment provides a graded alarm system for an intrinsically safe laser methane sensor for mining, including: a main controller and a color alarm light module, a buzzer module and a display module electrically connected to the main controller. The main controller is used to identify different states of the laser methane sensor and then control the color alarm light module and the buzzer module to flash different lights and sound different sounds, and display the different states of the laser methane sensor on the display interface.
[0006] In one possible implementation, the main controller uses a PIC24HJ64GP502-I / MM chip. The OSC1 port of the PIC24HJ64GP502-I / MM chip is electrically connected to the first terminal of a first resistor, the first terminal of a first crystal oscillator, and the first terminal of a first capacitor. The second terminal of the first resistor is electrically connected to the OSC2 port of the PIC24HJ64GP502-I / MM chip, the second port of the first crystal oscillator, and the first terminal of the second capacitor. The MCLR port of the PIC24HJ64GP502-I / MM chip is electrically connected to the first terminal of a second resistor. The second terminals of the two resistors are electrically connected to the first terminals of the third resistor and the third capacitor, respectively. The second terminal of the third resistor is electrically connected to a 3.3V power supply. The AVDD port of the PIC24HJ64GP502-I / MM chip is electrically connected to a 3.3V power supply. The VCAP port of the PIC24HJ64GP502-I / MM chip is electrically connected to the first terminal of the fourth capacitor. The VSS port, AVSS port, EP port of the PIC24HJ64GP502-I / MM chip, as well as the second terminals of the first, second, third, and fourth capacitors, are grounded.
[0007] In one possible implementation, the color alarm light module employs two RGB full-color lights and one communication light. The RGB full-color lights are WN-5050RGBC-TX1812C. The DIN port of the first WN-5050RGBC-TX1812C is electrically connected to the AN4 / C1IN- / RP2(1) / CN6 / RB2 port of the main controller. The DOU port of the first WN-5050RGBC-TX1812C is electrically connected to the DIN port of the second WN-5050RGBC-TX1812C. The VDD ports of both the WN-5050RGBC-TX1812C and the second WN-5050RGBC-TX1812C are electrically connected to a 5V power supply. The GND ports of the first WN-5050RGBC-TX1812C and the second WN-5050RGBC-TX1812C are grounded. The first end of the communication lamp is electrically connected to the AN5 / C1IN+ / RP3(1) / CN7 / RB3 port of the main controller. The second end of the communication lamp is electrically connected to the first end of the fourth resistor. The second end of the fourth resistor is electrically connected to a 3.3V power supply.
[0008] In one possible implementation, the first port of the buzzer module is electrically connected to a 12V power supply, the second port of the buzzer is electrically connected to the collector of the first transistor, the base of the first transistor is electrically connected to the first end of the fifth resistor, the second end of the fifth resistor is electrically connected to the TDO / SDA1 / RP9(1) / CN21 / PMD3 / RB9 port of the main controller, and the emitter of the first transistor is grounded.
[0009] In one possible implementation, the display module employs an M00595-VGM128064B1B02 chip. The VDD port of the M00595-VGM128064B1B02 chip is electrically connected to a 3.3V power supply and the first terminal of a fifth capacitor, respectively. The port is electrically connected to the PGEC1 / AN3 / C2IN+ / RP1(1) / CN5 / RB1 port of the main controller. The D / C port of the M00595-VGM128064B1B02 chip is electrically connected to the PGED1 / AN2 / C2IN- / RP0(1) / CN4 / RB0 port of the main controller. The D0 port of the M00595-VGM128064B1B02 chip is electrically connected to the AN1 / VREF- / CN3 / RA1 port of the main controller. The D1 port of the M00595-VGM128064B1B02 chip is electrically connected to the AN0 / VREF+ / CN2 / RA0 port of the main controller. The IREF port of the chip is electrically connected to the first terminal of the sixth resistor. The VCOMH port of the M00595-VGM128064B1B02 chip is electrically connected to the first terminal of the sixth capacitor. The VCC port of the M00595-VGM128064B1B02 chip is electrically connected to the 13V power supply and the first terminal of the seventh capacitor. The RES port of the M00595-VGM128064B1B02 chip is electrically connected to the anode of the diode, the first terminal of the seventh resistor, and the first terminal of the eighth capacitor. The cathode of the diode and the second terminal of the seventh resistor are electrically connected to the 3.3V power supply. The VSS port, BS1 port, and BS2 port of the M00595-VGM128064B1B02 chip... port, The ports D3 to D7, the second terminal of the fifth capacitor, the second terminal of the sixth resistor, the second terminal of the sixth capacitor, the second terminal of the seventh capacitor, and the second terminal of the eighth capacitor are grounded.
[0010] In one possible implementation, a passive relay interface, a 485 communication interface, and a CAN communication interface are also included. The first end of the passive relay interface is electrically connected to the third port of the relay, the second end of the passive relay interface is electrically connected to the fourth port of the relay, the first port of the relay is electrically connected to a 5V power supply, the fifth port of the relay is electrically connected to the first end of an eighth resistor, the second end of the eighth resistor is electrically connected to the first end of a ninth resistor and the SOSCO / T1CK / CN0 / PMA1 / RA4 port of the main controller, the sixth port of the relay is electrically connected to a 3.3V power supply, the eighth port of the relay is electrically connected to the collector of a second diode, the base of the second diode is electrically connected to the first end of a tenth resistor, the second end of the tenth resistor is electrically connected to the SOSCI / RP4(1) / CN1 / PMBE / RB4 port of the main controller, and the emitter of the second diode and the second end of the ninth resistor are grounded.
[0011] In one possible implementation, the first terminal of the 485 communication interface is electrically connected to the first terminal of the eleventh resistor and the B port of the SP3485EN-L / TR, respectively; the second terminal of the 485 communication interface is electrically connected to the first terminal of the twelfth resistor and the A port of the SP3485EN-L / TR, respectively; the second terminal of the twelfth resistor and the VCC port of the SP3485EN-L / TR are electrically connected to a 3.3V power supply; and the RO port of the SP3485EN-L / TR is connected to the first terminal of the thirteenth resistor and the AN10 / RTCC / RP14 / C port of the main controller, respectively. The N12 / PMWR / RB14 port is electrically connected, the second end of the thirteenth resistor is electrically connected to the 3.3V power supply, the RE# port and DE port of the SP3485EN-L / TR are both electrically connected to the AN11 / RP13(1) / CN13 / PMRD / RB13 port of the main controller, the DI port of the SP3485EN-L / TR is electrically connected to the AN12 / RP12(1) / CN14 / PMD0 / RB12 port of the main controller, and the second end of the eleventh resistor and the GND port of the SP3485EN-L / TR are grounded.
[0012] In one possible implementation, the first port of the CAN communication interface is electrically connected to the CANH port of the SN65HVDA540QD, the second port of the CAN communication interface is electrically connected to the CANL port of the SN65HVDA540QD, the VIO port of the SN65HVDA540QD is electrically connected to the 3.3V power supply and the first terminal of the ninth capacitor, the TXD port of the SN65HVDA540QD is electrically connected to the PGEC2 / TMS / RP11(1) / CN15 / PMD1 / RB11 port of the main controller, the RXD port of the SN65HVDA540QD is electrically connected to the PGED2 / TDI / RP10(1) / CN16 / PMD2 / RB10 port of the main controller, the VCC port of the SN65HVDA540QD is electrically connected to the 5V power supply, and the STB port and GND port of the SN65HVDA540QD and the second terminal of the ninth capacitor are grounded.
[0013] In one possible implementation, an infrared control module is also included, which uses a TSOP38238 chip. The VS port of the TSOP38238 chip is electrically connected to a 3.3V power supply, the OUT port of the TSOP38238 chip is electrically connected to the SIG IR port of the main controller, and the GND port of the TSOP38238 is grounded.
[0014] In one possible implementation, a laser methane sensor probe is also included, wherein the first port of the laser methane sensor probe is electrically connected to a 5V power supply, the second port of the laser methane sensor probe is grounded, the third port of the laser methane sensor probe is electrically connected to the INT0 / RP7(1) / CN23 / PMD5 / RB7 port of the main controller, and the fourth port of the laser methane sensor probe is electrically connected to the TCK / SCL1 / RP8(1) / CN22 / PMD4 / RB8 port of the main controller.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] The alarm system in this invention can perform different actions according to different states. It provides precise prompts with different colored lights for various situations, such as malfunction of the downhole laser methane sensor, excessive methane concentration, and normal state, and displays them on the display interface. Compared with ordinary alarm systems that do not respond or light up red when malfunctioning, this system can avoid failing to detect faults in time or generating responses that are confused with excessive methane concentration, reduce environmental misjudgments, and shorten the average maintenance time. Attached Figure Description
[0017] Figure 1A schematic diagram of a graded alarm system for an intrinsically safe laser methane sensor for mining, provided for an embodiment of this utility model;
[0018] Figure 2 A schematic diagram of the circuit structure of the main controller provided in an embodiment of this utility model;
[0019] Figure 3 A schematic diagram of the circuit structure of the color alarm light module provided in this embodiment of the utility model;
[0020] Figure 4 A schematic diagram of the circuit structure of the buzzer module provided in this embodiment of the utility model;
[0021] Figure 5 A schematic diagram of the circuit structure of the display module provided in an embodiment of this utility model;
[0022] Figure 6 A schematic diagram of the circuit structure of the passive relay interface provided in this embodiment of the utility model;
[0023] Figure 7 A schematic diagram of the circuit structure of the 485 communication interface and the CAN communication interface provided for embodiments of this utility model;
[0024] Figure 8 A schematic diagram of the circuit structure of the infrared control module provided in this embodiment of the utility model;
[0025] Figure 9 A schematic diagram of the circuit structure of the laser methane sensor probe provided in an embodiment of this utility model. Detailed Implementation
[0026] The present solution will now be described in conjunction with the accompanying drawings and specific embodiments.
[0027] Figure 1 A schematic diagram of a graded alarm system for an intrinsically safe laser methane sensor for mining, provided in an embodiment of this application, is shown below. Figure 1 This embodiment discloses a graded alarm system for an intrinsically safe laser methane sensor used in mining, comprising: a main controller and a color alarm light module, a buzzer module, a display module, a passive relay interface, a 485 communication interface, a CAN communication interface, an infrared control module, and a laser methane sensor probe electrically connected to the main controller. The main controller is used to identify different states of the laser methane sensor, such as normal state, fault state, and methane concentration exceeding the standard state, and then control the color alarm light module and the buzzer module to flash different lights and sound different sounds, and display the normal state, fault state, and methane concentration exceeding the standard state of the laser methane sensor on the display interface.
[0028] In this embodiment, when there is no fault and the methane content is below the set value, the green light remains constantly lit. If the light does not illuminate, it indicates that the warning light is damaged. When the system itself malfunctions, a yellow light will flash at a frequency of 1 Hz to indicate the fault, and a buzzer will sound intermittently. After noticing this, the user can combine the text prompts on the display screen to determine the source of the machine's fault and handle it as soon as possible. The faults that can be identified in this embodiment include: sensor probe malfunction, communication malfunction, and relay sticking malfunction. When the methane concentration exceeds the set value, or when the simulated methane concentration exceeds the set value in test mode, a red light will flash at a frequency of 3 Hz, and a buzzer will sound continuously to indicate that the methane concentration exceeds the limit.
[0029] The infrared control module is used to perform zeroing, calibration, and parameter setting operations on the graded alarm system via an infrared remote control. The passive relay interface, RS-485 communication interface, and CAN communication interface are the three output interfaces of the graded alarm system. The passive relay interface can be directly connected to the circuit control; it cuts off the external circuit when the methane content exceeds the set value. The RS-485 and CAN communication interfaces are used to communicate with external devices. The current communication mode can be set via the infrared remote control, and the methane concentration value and device status are reported to other communication-enabled devices in real time. When the RS-485 communication interface acts as a Modbus slave (the master sends a command every 1 second), the communication interval monitoring time can be set, such as 2 seconds. If no command is received from the master within this monitoring time, a fault state is immediately determined, and the main interface displays a RS-485 communication fault, allowing the user to promptly detect and locate the fault. The graded alarm system for the laser methane sensor in this embodiment can simultaneously support 485 communication and CAN communication. Compared with the existing methane sensor alarm system that only supports one type of communication, it is compatible with more communication devices, and the use of shared port lines can also save on wiring and reduce costs.
[0030] See Figure 2In this embodiment, the main controller uses a PIC24HJ64GP502-I / MM chip. The OSC1 port of the PIC24HJ64GP502-I / MM chip is electrically connected to the first terminal of a first resistor R9, the first terminal of a first crystal oscillator X1, and the first terminal of a first capacitor C6. The second terminal of the first resistor R9 is electrically connected to the OSC2 port of the PIC24HJ64GP502-I / MM chip, the second port of the first crystal oscillator X1, and the first terminal of a second capacitor C7. The MCLR port of the PIC24HJ64GP502-I / MM chip is electrically connected to the first terminal of a second resistor R7. The second terminal is electrically connected to the first terminal of the third resistor R3 and the first terminal of the third capacitor C5, respectively. The second terminal of the third resistor R3 is electrically connected to a 3.3V power supply. The AVDD port of the PIC24HJ64GP502-I / MM chip is electrically connected to a 3.3V power supply. The VCAP port of the PIC24HJ64GP502-I / MM chip is electrically connected to the first terminal of the fourth capacitor C8. The VSS port, AVSS port, EP port of the PIC24HJ64GP502-I / MM chip, as well as the second terminals of the first capacitor C6, the second capacitor C7, the third capacitor C5, and the fourth capacitor C8 are grounded.
[0031] See Figure 3 In this embodiment, the color alarm light module uses two RGB full-color lights and one communication light. The RGB full-color lights LED1 and LED2 are WN-5050RGBC-TX1812C. The DIN port of the first WN-5050RGBC-TX1812C is electrically connected to the AN4 / C1IN- / RP2(1) / CN6 / RB2 port of the main controller. The DOU port of the first WN-5050RGBC-TX1812C is electrically connected to the DIN port of the second WN-5050RGBC-TX1812C. The VDD ports of the 050RGBC-TX1812C and the second WN-5050RGBC-TX1812C are both electrically connected to a 5V power supply. The GND ports of the first WN-5050RGBC-TX1812C and the second WN-5050RGBC-TX1812C are grounded. The first end of the communication lamp LED3 is electrically connected to the AN5 / C1IN+ / RP3(1) / CN7 / RB3 port of the main controller. The second end of the communication lamp LED3 is electrically connected to the first end of the fourth resistor R6. The second end of the fourth resistor R6 is electrically connected to a 3.3V power supply.
[0032] See Figure 4In this embodiment, the first port of the buzzer Beep1 is electrically connected to a 12V power supply, the second port of the buzzer Beep1 is electrically connected to the collector of the first transistor Q1, the base of the first transistor Q1 is electrically connected to the first end of the fifth resistor R10, the second end of the fifth resistor R10 is electrically connected to the TDO / SDA1 / RP9(1) / CN21 / PMD3 / RB9 port of the main controller, and the emitter of the first transistor Q1 is grounded.
[0033] See Figure 5 In this embodiment, the display module uses the M00595-VGM128064B1B02 chip. The VDD port of the M00595-VGM128064B1B02 chip is electrically connected to the 3.3V power supply and the first terminal of the fifth capacitor C4, respectively. The port is electrically connected to the PGEC1 / AN3 / C2IN+ / RP1(1) / CN5 / RB1 port of the main controller. The D / C port of the M00595-VGM128064B1B02 chip is electrically connected to the PGED1 / AN2 / C2IN- / RP0(1) / CN4 / RB0 port of the main controller. The D0 port of the M00595-VGM128064B1B02 chip is electrically connected to the AN1 / VREF- / CN3 / RA1 port of the main controller. The D1 port of the M00595-VGM128064B1B02 chip is electrically connected to the AN0 / VREF+ / CN2 / RA0 port of the main controller. The IREF terminal of the M00595-VGM128064B1B02 chip... The M00595-VGM128064B1B02 chip's VCOMH port is electrically connected to the first terminal of the sixth capacitor C2. The M00595-VGM128064B1B02 chip's VCC port is electrically connected to the 13V power supply and the first terminal of the seventh capacitor C3. The M00595-VGM128064B1B02 chip's RES port is electrically connected to the anode of diode D1, the first terminal of the seventh resistor R1, and the first terminal of the eighth capacitor C1. The cathode of diode D1 and the second terminal of the seventh resistor R1 are electrically connected to the 3.3V power supply. The M00595-VGM128064B1B02 chip's VSS, BS1, and BS2 ports... port, The ports D3 to D7, the second terminal of the fifth capacitor C4, the second terminal of the sixth resistor R2, the second terminal of the sixth capacitor C2, the second terminal of the seventh capacitor C3, and the second terminal of the eighth capacitor C1 are grounded.
[0034] See Figure 6 In this embodiment, the first end of the passive relay interface P3 is electrically connected to the third port of the relay, the second end of the passive relay interface P3 is electrically connected to the fourth port of the relay, the first port of the relay is electrically connected to a 5V power supply, the fifth port of the relay is electrically connected to the first end of the eighth resistor R11, the second end of the eighth resistor R11 is electrically connected to the first end of the ninth resistor R13 and the SOSCO / T1CK / CN0 / PMA1 / RA4 port of the main controller, the sixth port of the relay is electrically connected to a 3.3V power supply, the eighth port of the relay is electrically connected to the collector of the second diode Q2, the base of the second diode Q2 is electrically connected to the first end of the tenth resistor R12, the second end of the tenth resistor R12 is electrically connected to the SOSCI / RP4(1) / CN1 / PMBE / RB4 port of the main controller, and the emitter of the second diode Q2 and the second end of the ninth resistor R13 are grounded.
[0035] See Figure 7 In this embodiment, the first terminal of the 485 communication interface P1 is electrically connected to the first terminal of the eleventh resistor R5 and the B port of the SP3485EN-L / TR, respectively. The second terminal of the 485 communication interface P1 is electrically connected to the first terminal of the twelfth resistor R8 and the A port of the SP3485EN-L / TR, respectively. The second terminal of the twelfth resistor R8 and the VCC port of the SP3485EN-L / TR are electrically connected to a 3.3V power supply. The RO port of the SP3485EN-L / TR is electrically connected to the first terminal of the thirteenth resistor R4 and the AN10 / RTCC / RP14 / of the main controller, respectively. The CN12 / PMWR / RB14 ports are electrically connected, the second end of the thirteenth resistor R4 is electrically connected to the 3.3V power supply, the RE# and DE ports of the SP3485EN-L / TR are both electrically connected to the AN11 / RP13(1) / CN13 / PMRD / RB13 ports of the main controller, the DI port of the SP3485EN-L / TR is electrically connected to the AN12 / RP12(1) / CN14 / PMD0 / RB12 ports of the main controller, and the second end of the eleventh resistor R5 and the GND port of the SP3485EN-L / TR are grounded.
[0036] In this embodiment, the first port of the CAN communication interface P2 is electrically connected to the CANH port of the SN65HVDA540QD, the second port of the CAN communication interface P2 is electrically connected to the CANL port of the SN65HVDA540QD, the VIO port of the SN65HVDA540QD is electrically connected to the 3.3V power supply and the first end of the ninth capacitor C9, the TXD port of the SN65HVDA540QD is electrically connected to the PGC2 / TMS / RP11(1) / CN15 / PMD1 / RB11 port of the main controller, the RXD port of the SN65HVDA540QD is electrically connected to the PGC2 / TDI / RP10(1) / CN16 / PMD2 / RB10 port of the main controller, the VCC port of the SN65HVDA540QD is electrically connected to the 5V power supply, and the STB port and GND port of the SN65HVDA540QD and the second end of the ninth capacitor C9 are grounded.
[0037] See Figure 8 In this embodiment, the infrared control module uses a TSOP38238 chip. The VS port of the TSOP38238 chip is electrically connected to a 3.3V power supply, the OUT port of the TSOP38238 chip is electrically connected to the SIG IR port of the main controller, and the GND port of the TSOP38238 chip is grounded.
[0038] See Figure 9 In this embodiment, the first port of the laser methane sensor probe P4 is electrically connected to a 5V power supply, the second port of the laser methane sensor probe P4 is grounded, the third port of the laser methane sensor probe P4 is electrically connected to the INT0 / RP7(1) / CN23 / PMD5 / RB7 port of the main controller, and the fourth port of the laser methane sensor probe P4 is electrically connected to the TCK / SCL1 / RP8(1) / CN22 / PMD4 / RB8 port of the main controller.
[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0040] The above description is merely a specific embodiment of this utility model. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A graded alarm system for an intrinsically safe laser methane sensor used in mining, characterized in that, include: The system includes a main controller and a color alarm light module, a buzzer module, and a display module electrically connected to the main controller. The main controller is used to identify different states of the laser methane sensor and then control the color alarm light module and the buzzer module to flash different lights and sound different sounds, and to display the different states of the laser methane sensor on the display interface.
2. The graded alarm system for an intrinsically safe laser methane sensor for mining applications according to claim 1, characterized in that, The main controller uses a PIC24HJ64GP502-I / MM chip. The OSC1 port of the PIC24HJ64GP502-I / MM chip is electrically connected to the first terminal of a first resistor, the first terminal of a first crystal oscillator, and the first terminal of a first capacitor. The second terminal of the first resistor is electrically connected to the OSC2 port of the PIC24HJ64GP502-I / MM chip, the second port of the first crystal oscillator, and the first terminal of a second capacitor. The MCLR port of the PIC24HJ64GP502-I / MM chip is electrically connected to the first terminal of a second resistor. The second terminal of the second resistor... The first terminal of the third resistor and the first terminal of the third capacitor are electrically connected to each other. The second terminal of the third resistor is electrically connected to a 3.3V power supply. The AVDD port of the PIC24HJ64GP502-I / MM chip is electrically connected to a 3.3V power supply. The VCAP port of the PIC24HJ64GP502-I / MM chip is electrically connected to the first terminal of the fourth capacitor. The VSS port, AVSS port, EP port of the PIC24HJ64GP502-I / MM chip, as well as the second terminals of the first, second, third, and fourth capacitors are grounded.
3. The graded alarm system for an intrinsically safe laser methane sensor for mining applications according to claim 1, characterized in that, The color alarm light module uses two RGB full-color lights and one communication light. The RGB full-color lights are WN-5050RGBC-TX1812C. The DIN port of the first WN-5050RGBC-TX1812C is electrically connected to the AN4 / C1IN- / RP2(1) / CN6 / RB2 port of the main controller. The DOU port of the first WN-5050RGBC-TX1812C is electrically connected to the DIN port of the second WN-5050RGBC-TX1812C. The VDD ports of the 0RGBC-TX1812C and the second WN-5050RGBC-TX1812C are both electrically connected to a 5V power supply. The GND ports of the first WN-5050RGBC-TX1812C and the second WN-5050RGBC-TX1812C are grounded. The first end of the communication lamp is electrically connected to the AN5 / C1IN+ / RP3(1) / CN7 / RB3 port of the main controller. The second end of the communication lamp is electrically connected to the first end of the fourth resistor. The second end of the fourth resistor is electrically connected to a 3.3V power supply.
4. The graded alarm system for an intrinsically safe laser methane sensor for mining applications according to claim 1, characterized in that, The first port of the buzzer module is electrically connected to a 12V power supply, the second port of the buzzer is electrically connected to the collector of the first transistor, the base of the first transistor is electrically connected to the first end of the fifth resistor, the second end of the fifth resistor is electrically connected to the TDO / SDA1 / RP9(1) / CN21 / PMD3 / RB9 port of the main controller, and the emitter of the first transistor is grounded.
5. The graded alarm system for an intrinsically safe laser methane sensor for mining applications according to claim 1, characterized in that, The display module uses the M00595-VGM128064B1B02 chip. The VDD port of the M00595-VGM128064B1B02 chip is electrically connected to a 3.3V power supply and the first terminal of the fifth capacitor, respectively. The port is electrically connected to the PGEC1 / AN3 / C2IN+ / RP1(1) / CN5 / RB1 port of the main controller. The D / C port of the M00595-VGM128064B1B02 chip is electrically connected to the PGED1 / AN2 / C2IN- / RP0(1) / CN4 / RB0 port of the main controller. The D0 port of the M00595-VGM128064B1B02 chip is electrically connected to the AN1 / VREF- / CN3 / RA1 port of the main controller. The D1 port of the M00595-VGM128064B1B02 chip is electrically connected to the AN0 / VREF+ / CN2 / RA0 port of the main controller. The IREF port of the chip is electrically connected to the first terminal of the sixth resistor. The VCOMH port of the M00595-VGM128064B1B02 chip is electrically connected to the first terminal of the sixth capacitor. The VCC port of the M00595-VGM128064B1B02 chip is electrically connected to the 13V power supply and the first terminal of the seventh capacitor. The RES port of the M00595-VGM128064B1B02 chip is electrically connected to the anode of the diode, the first terminal of the seventh resistor, and the first terminal of the eighth capacitor. The cathode of the diode and the second terminal of the seventh resistor are electrically connected to the 3.3V power supply. The VSS port, BS1 port, and BS2 port of the M00595-VGM128064B1B02 chip... port, The ports D3 to D7, the second terminal of the fifth capacitor, the second terminal of the sixth resistor, the second terminal of the sixth capacitor, the second terminal of the seventh capacitor, and the second terminal of the eighth capacitor are grounded.
6. The graded alarm system for an intrinsically safe laser methane sensor for mining applications according to claim 1, characterized in that, It also includes a passive relay interface, a 485 communication interface, and a CAN communication interface. The first end of the passive relay interface is electrically connected to the third port of the relay, the second end of the passive relay interface is electrically connected to the fourth port of the relay, the first port of the relay is electrically connected to a 5V power supply, the fifth port of the relay is electrically connected to the first end of an eighth resistor, the second end of the eighth resistor is electrically connected to the first end of a ninth resistor and the SOSCO / T1CK / CN0 / PMA1 / RA4 port of the main controller, the sixth port of the relay is electrically connected to a 3.3V power supply, the eighth port of the relay is electrically connected to the collector of a second diode, the base of the second diode is electrically connected to the first end of a tenth resistor, the second end of the tenth resistor is electrically connected to the SOSCI / RP4(1) / CN1 / PMBE / RB4 port of the main controller, and the emitter of the second diode and the second end of the ninth resistor are grounded.
7. The graded alarm system for an intrinsically safe laser methane sensor for mining applications according to claim 6, characterized in that, The first end of the 485 communication interface is electrically connected to the first end of the eleventh resistor and the B port of the SP3485EN-L / TR. The second end of the 485 communication interface is electrically connected to the first end of the twelfth resistor and the A port of the SP3485EN-L / TR. The second end of the twelfth resistor and the VCC port of the SP3485EN-L / TR are electrically connected to a 3.3V power supply. The RO port of the SP3485EN-L / TR is electrically connected to the first end of the thirteenth resistor and the AN10 / RTCC / RP14 / CN12 / PM port of the main controller. The WR / RB14 port is electrically connected, the second end of the thirteenth resistor is electrically connected to the 3.3V power supply, the RE# port and DE port of the SP3485EN-L / TR are both electrically connected to the AN11 / RP13(1) / CN13 / PMRD / RB13 port of the main controller, the DI port of the SP3485EN-L / TR is electrically connected to the AN12 / RP12(1) / CN14 / PMD0 / RB12 port of the main controller, and the second end of the eleventh resistor and the GND port of the SP3485EN-L / TR are grounded.
8. The graded alarm system for an intrinsically safe laser methane sensor for mining applications according to claim 6, characterized in that, The first port of the CAN communication interface is electrically connected to the CANH port of the SN65HVDA540QD, the second port of the CAN communication interface is electrically connected to the CANL port of the SN65HVDA540QD, the VIO port of the SN65HVDA540QD is electrically connected to the 3.3V power supply and the first end of the ninth capacitor, the TXD port of the SN65HVDA540QD is electrically connected to the PGEC2 / TMS / RP11(1) / CN15 / PMD1 / RB11 port of the main controller, the RXD port of the SN65HVDA540QD is electrically connected to the PGED2 / TDI / RP10(1) / CN16 / PMD2 / RB10 port of the main controller, the VCC port of the SN65HVDA540QD is electrically connected to the 5V power supply, and the STB port and GND port of the SN65HVDA540QD and the second end of the ninth capacitor are grounded.
9. The graded alarm system for an intrinsically safe laser methane sensor for mining applications according to claim 1, characterized in that, It also includes an infrared control module, which uses a TSOP38238 chip. The VS port of the TSOP38238 chip is electrically connected to a 3.3V power supply, the OUT port of the TSOP38238 chip is electrically connected to the SIG IR port of the main controller, and the GND port of the TSOP38238 is grounded.
10. The graded alarm system for an intrinsically safe laser methane sensor for mining applications according to claim 1, characterized in that, It also includes a laser methane sensor probe, the first port of which is electrically connected to a 5V power supply, the second port of which is grounded, the third port of which is electrically connected to the INT0 / RP7(1) / CN23 / PMD5 / RB7 port of the main controller, and the fourth port of which is electrically connected to the TCK / SCL1 / RP8(1) / CN22 / PMD4 / RB8 port of the main controller.