Mine fire monitoring sensor

Abstract

The utility model discloses a mine fire monitoring sensor, which includes a smoke probe, a carbon monoxide probe, an MCU module, a smoke collection module, a carbon monoxide collection module, a three-axis acceleration sensor and a communication module; the output end of the smoke probe is connected to the input end of the smoke collection module, and the output end of the smoke collection module is connected to the MCU module; the output end of the carbon monoxide probe is connected to the input end of the carbon monoxide collection module, and the output end of the carbon monoxide collection module is connected to the MCU module; the output end of the three-axis acceleration sensor is connected to the MCU module, and the MCU module is connected to the communication module. The utility model provides a mine fire monitoring sensor, which performs dual judgment through smoke and carbon monoxide, improves the accuracy of fire detection, and detects the posture of the fire monitoring sensor at the same time to ensure normal use.

Description

Technical Field

[0001] The utility model relates to a mine fire monitoring sensor, belonging to the technical field of coal mine safety monitoring. Background Art

[0002] At present, fire monitoring in coal mines mostly uses smoke monitoring technology to conduct fire alarms. However, non-fire smoke generated during underground construction can cause false fire alarms, thus affecting the normal production of coal mines. In addition, because the underground environment of coal mines is complex and harsh, underground workers may collide with sensors during construction and production, causing the sensors to fall off, affecting the sensor's monitoring effect on fires. Summary of the invention

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a mine fire monitoring sensor which performs dual judgments through smoke and carbon monoxide, thereby improving the accuracy of fire detection and detecting the posture of the fire monitoring sensor at the same time to ensure normal use.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A mine fire monitoring sensor, comprising a smoke probe, a carbon monoxide probe, an MCU module, a smoke collection module, a carbon monoxide collection module, a three-axis acceleration sensor and a communication module;

[0006] The output end of the smoke probe is connected to the input end of the smoke collection module, and the output end of the smoke collection module is connected to the MCU module;

[0007] The output end of the carbon monoxide probe is connected to the input end of the carbon monoxide collection module, and the output end of the carbon monoxide collection module is connected to the MCU module;

[0008] The output end of the three-axis acceleration sensor is connected to the MCU module, and the MCU module is connected to the communication module.

[0009] Furthermore, it also includes a power-off output module, the input end of which is connected to the MCU module, and the output end of which is used to output a power-off control signal.

[0010] Furthermore, it also includes a sound alarm module, which includes a buzzer and a buzzer driving module. The input end of the buzzer driving module is connected to the MCU module, and the output end of the buzzer driving module is connected to the buzzer.

[0011] Furthermore, it also includes a light alarm module, which includes an LED lamp and a light driving module. The input end of the light driving module is connected to the MCU module, and the output end of the light driving module is connected to the LED lamp.

[0012] Furthermore, it also includes a power supply module, which is used to supply power to each module of the mine fire monitoring sensor.

[0013] Furthermore, the model of the MCU module is STM32F103RCT6.

[0014] Furthermore, the model of the three-axis acceleration sensor is LIS2DH12.

[0015] By adopting the above technical solution, the utility model uses smoke and carbon monoxide as dual judgment conditions to judge whether a fire has occurred, thereby improving the accuracy of fire detection. At the same time, a three-axis acceleration sensor is added to monitor the posture of the fire monitoring sensor. When the mine fire monitoring sensor shakes violently or falls from the original installation position to the ground, the monitoring personnel are reminded to pay attention to the problem of the use posture of the mine fire monitoring sensor to ensure normal use. In the event of a fire alarm, a power-off output is performed to cut off the power supply of the subsequent electrical equipment to reduce fire losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a principle block diagram of the mine fire monitoring sensor of the utility model;

[0017] Figure 2 This is a circuit schematic diagram of the MCU module of the utility model;

[0018] Figure 3 This is a circuit schematic diagram of the smoke collection module of the utility model;

[0019] Figure 4 This is a circuit schematic diagram of the carbon monoxide collection module of the utility model;

[0020] Figure 5 This is a circuit schematic diagram of the three-axis acceleration sensor of the utility model;

[0021] Figure 6 This is a circuit schematic diagram of the communication module of the utility model;

[0022] Figure 7 The circuit schematic diagram of the sound alarm module and the light alarm module of the utility model;

[0023] Figure 8 This is a circuit schematic diagram of the power-off output module of the utility model;

[0024] Fig. 9 This is a circuit schematic diagram of the power module of the utility model. DETAILED DESCRIPTION

[0025] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0026] like Figure 1 As shown, this embodiment provides a mine fire monitoring sensor, which includes a smoke probe, a carbon monoxide probe, an MCU module, a smoke collection module, a carbon monoxide collection module, a three-axis acceleration sensor, a communication module, a power-off output module, a sound alarm module, a light alarm module and a power module.

[0027] like Figure 1 As shown, the output end of the smoke detector of this embodiment is connected to the input end of the smoke collection module, and the output end of the smoke collection module is connected to the MCU module. The output end of the carbon monoxide detector is connected to the input end of the carbon monoxide collection module, and the output end of the carbon monoxide collection module is connected to the MCU module. When a fire occurs, in addition to smoke, carbon monoxide will also be produced at the same time. The smoke detector and the carbon monoxide detector simultaneously sense smoke and carbon monoxide. When both are produced at the same time to meet the alarm conditions, the MCU module outputs an alarm signal. Figure 3 As shown, the smoke collection module of this embodiment is composed of sampling resistors R36, R37, and R84. The output signal of the smoke detector is sampled by the sampling resistor and then enters the MCU module. Figure 4 As shown, the carbon monoxide collection module of this embodiment is composed of an analog-to-digital conversion chip U10 and a reference voltage chip U13. The model of the analog-to-digital conversion chip U10 is ADS7822, and the model of the reference voltage chip U13 is LM336. The analog-to-digital conversion chip U10 converts the output signal of the carbon monoxide probe into a digital signal, and then enters the MCU module. The reference voltage chip U13 provides a reference voltage for the analog-to-digital conversion chip U10.

[0028] like Figure 1 As shown, the output end of the three-axis acceleration sensor of this embodiment is connected to the MCU module. Figure 5 As shown, the three-axis acceleration sensor of this embodiment adopts the three-axis acceleration chip U100, model LIS2DH12. The three-axis acceleration sensor is used to monitor the acceleration of the mine fire monitoring sensor on three spatial axes. If the mine fire monitoring sensor is violently shaken by external force or falls to the ground from the original installation position, it will cause the acceleration to change, so that the MCU module sends a prompt message to the host computer to remind the monitoring personnel to pay attention to the problem of the use posture of the mine fire monitoring sensor.

[0029] like Figure 1As shown, the MCU module of this embodiment communicates with the host computer through the communication module. Figure 6 As shown, the communication module of this embodiment is an RS485 communication circuit, and the RS485 communication circuit adopts an RS485 chip U6, model SN65HVD72DR.

[0030] like Figure 1 As shown, the sound alarm module of this embodiment includes a buzzer and a buzzer driving module, the input end of the buzzer driving module is connected to the MCU module, and the output end of the buzzer driving module is connected to the buzzer. Figure 7 As shown, the sound alarm module of this embodiment is composed of a boost circuit and a MOS tube. The boost circuit adopts a boost chip U1. The 3.3V power supply is boosted by the boost chip U1 and then supplied to the buzzer 17. When an alarm occurs, the MCU module controls the MOS tube Q22 to be turned on, so that the buzzer 17 is powered on and the buzzer emits an alarm prompt sound.

[0031] like Figure 1 As shown, the light alarm module of this embodiment includes an LED light and a light driving module, the input end of the light driving module is connected to the MCU module, and the output end of the light driving module is connected to the LED light. Figure 7 As shown, when an alarm occurs, the MOS tube Q21 receives the level signal sent by the MCU module, the MOS tube Q21 is turned on, and the LED light is lit through the 3.3V power supply to provide a light alarm prompt.

[0032] like Figure 1 As shown, the input end of the power-off output module of this embodiment is connected to the MCU module, and the output end of the power-off output module is used to output a power-off control signal. The output terminal P8 of the power-off output module serves as a power switch for the subsequent electrical equipment. When a fire occurs, the power supply of the subsequent electrical equipment is cut off to prevent the subsequent electrical equipment from not being powered off during a fire and causing greater losses. Figure 8 As shown, when there is no fire, the MCU module outputs a low level, that is, POWERCTR is low, and the transistor Q3 is turned on. When a fire alarm occurs, the MCU module outputs a high level, and the transistor Q3 is turned off, thereby cutting off the power to the subsequent electrical equipment.

[0033] like Figure 2 As shown, the model of the MCU module of this embodiment is STM32F103RCT6, which is powered by 3.3V, has 64k bytes of flash memory, 20k bytes of SRAM, and a CRC calculation unit with two 12-bit ADCs.

[0034] like Figure 1 , 9As shown, the power module of this embodiment is used to power each module of the mine fire monitoring sensor. U11 of the power module is a LM2674 series voltage regulator, a monolithic integrated circuit manufactured using LMDMOS technology. It supports wide voltage input, with a voltage range of 8V to 40V, and a continuous output current of up to 5A. The line adjustment and transient response are improved by input voltage feedforward, and the system is protected by overcurrent limitation, overvoltage protection and thermal shutdown. The circuit uses diode freewheeling D5 to ensure the smoothness of the current and prevent overcurrent from burning the subsequent circuit to avoid losses. The circuit design outputs a 5V power supply and is used as a 3.3V power supply input. The circuit design uses two TVS tubes, D6 and D7, to maximize the protection of the back end, and quickly turn on when there is a large voltage and current fault in the front stage to protect important devices such as the back-end main control chip. U12 is a 5V to 3.3V voltage regulator that provides a stable 3.3V voltage.

[0035] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mine fire monitoring sensor, characterized in that: It includes a smoke detector, a carbon monoxide detector, an MCU module, a smoke collection module, a carbon monoxide collection module, a three-axis acceleration sensor and a communication module; The output end of the smoke probe is connected to the input end of the smoke collection module, and the output end of the smoke collection module is connected to the MCU module; The output end of the carbon monoxide probe is connected to the input end of the carbon monoxide collection module, and the output end of the carbon monoxide collection module is connected to the MCU module; The output end of the three-axis acceleration sensor is connected to the MCU module, and the MCU module is connected to the communication module.

2. The mine fire monitoring sensor according to claim 1, characterized in that: It also includes a power-off output module, the input end of which is connected to the MCU module, and the output end of which is used to output a power-off control signal.

3. The mine fire monitoring sensor according to claim 1, characterized in that: It also includes a sound alarm module, which includes a buzzer and a buzzer driving module. The input end of the buzzer driving module is connected to the MCU module, and the output end of the buzzer driving module is connected to the buzzer.

4. The mine fire monitoring sensor according to claim 1, characterized in that: It also includes a light alarm module, which includes an LED lamp and a light driving module. The input end of the light driving module is connected to the MCU module, and the output end of the light driving module is connected to the LED lamp.

5. The mine fire monitoring sensor according to claim 1, characterized in that: It also includes a power supply module, which is used to supply power to each module of the mine fire monitoring sensor.

6. The mine fire monitoring sensor according to claim 1, characterized in that: The model of the MCU module is STM32F103RCT6.

7. The mine fire monitoring sensor according to claim 1, characterized in that: The model of the three-axis acceleration sensor is LIS2DH12.

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