Underground hazardous gas sound-light alarm system

Abstract

The utility model discloses an underground hazardous gas acousto-optic alarm system, which comprises a data acquisition module, a control module, an acousto-optic alarm module, a display module and a communication module, and adopts the combination of a signal pre-amplification unit, an operational amplifier filtering unit and an analog-to-digital conversion unit in the design of the data acquisition module. The weak signal received from the gas sensor can be accurately processed and analyzed, so that the detection precision and the real-time performance are improved; according to the system design, when it is detected that the gas concentration exceeds the safety range, the control module can activate the sound-light alarm module to send out sound and light signals to give an alarm, meanwhile, alarm information is displayed to underground personnel through the display module, and it is ensured that the personnel can take danger avoiding measures in time; and a more comprehensive and effective solution is provided for safety monitoring of a mine operation environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to dangerous gas detection technical field, especially a kind of underground dangerous gas sound-light alarm system. BACKGROUND

[0002] In mine operating environment, safety is always a crucial issue. Due to the complex and variable geological conditions of mine, the ventilation system is often difficult to achieve the ideal state, resulting in the existence of a variety of dangerous gases in the underground environment, mainly including methane (CH4), carbon monoxide (CO) and hydrogen sulfide (H2S) and so on. The existence of these gases not only threatens the life safety of miners, but also may cause serious production safety accidents.

[0003] At present, although some safety monitoring systems have been applied in mine operating environment, they still have deficiencies in detection accuracy, real-time performance and reliability. For example, the Chinese invention patent with application number 2016106104075 proposes an electrical communication detection and early warning system based on stratum construction, which improves the safety monitoring level of mine operating environment to a certain extent, but the environmental conditions in the deep mine are extremely variable, including high temperature, high humidity, dust concentration and so on. These factors may affect the accuracy and stability of the sensor. The system may not fully consider the influence of these environmental factors on the performance of the sensor, resulting in that the sensor may affect the accuracy of the monitoring data due to external interference factors during long-term operation.

[0004] Therefore, the utility model provides a new scheme to solve this problem. UTILITY MODEL CONTENT

[0005] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide an underground dangerous gas sound-light alarm system.

[0006] The technical solution solved is: an underground dangerous gas sound-light alarm system, comprising:

[0007] A data acquisition module is used to collect the concentration signals of various dangerous gases in the underground environment through multiple gas sensors, and to amplify, filter and digitize the collected signals.

[0008] A control module is used to receive the data of the data acquisition module and make logical judgment, and to determine whether to trigger alarm according to the system preset safety threshold.

[0009] A sound-light alarm module is connected with the control module, and starts to work when the control module detects that the gas concentration exceeds the system preset safety threshold, which is used to issue sound and light signals for alarm.

[0010] A display module, connected with the control module, for displaying the concentration data of the dangerous gas in the well in real time, as well as the running state and alarm information of the system.

[0011] A communication module, connected with the control module, for transmitting the system data to a ground monitoring center so that the management personnel can monitor the safety condition in the well in real time.

[0012] Preferably, the data acquisition module further comprises:

[0013] A signal pre-amplification unit for preliminarily amplifying the weak signal received from the gas sensor to improve the strength of the signal;

[0014] An operational amplifier filter unit for further amplifying the signal and removing noise and interference through filtering to ensure the accuracy and reliability of the signal;

[0015] An analog-to-digital conversion unit for converting the analog signal output by the operational amplifier filter unit into a digital signal for subsequent digital processing and analysis by the control module.

[0016] Preferably, the signal pre-amplification unit comprises a transistor T1 and a field effect transistor Q1, the base of the transistor T1 is connected with one end of a resistor R2 and a resistor R3, the other end of the resistor R2 is connected with the signal output end of the gas sensor, the other end of the resistor R3 is grounded with the emitter of the transistor T1, the collector of the transistor T1 is connected with the gate of the field effect transistor Q1 and one end of a resistor R5 through a resistor R4, the other end of the resistor R5 is connected with one end of a resistor R1, a capacitor C2 and a capacitor C3, and a power supply VCC, the other end of the resistor R1 is connected with the power supply end of the gas sensor, the other end of the capacitor C2 and the capacitor C3 is grounded, and the drain of the field effect transistor Q1 is connected with the operational amplifier filter unit.

[0017] Preferably, the operational amplifier filter unit comprises an operational amplifier U1, the non-inverting input end of the operational amplifier U1 is connected with the drain of the field effect transistor Q1 through a resistor R6 and grounded through a capacitor C4, the inverting input end of the operational amplifier U1 is connected with one end of a resistor R7, a resistor R8 and a capacitor C6, the other end of the resistor R7 is connected with the output end of the operational amplifier U1 and one end of an inductor L1 through a capacitor C5, the other end of the resistor R8 and the other end of the capacitor C6 are grounded, and the other end of the inductor L1 is connected with the analog-to-digital conversion unit and grounded through a capacitor C7.

[0018] Preferably, the control module uses an EP3C16Q240C8N microprocessor.

[0019] Preferably, the sound and light alarm module comprises a control circuit, a warning light and a buzzer, the control circuit comprises a triode T2, the base of the triode T2 is connected with a resistor R9, one end of a capacitor C8 and the cathode of a stabilizing diode DZ1, the other end of the resistor R9 is connected with the instruction output end of the control module, the other end of the capacitor C8 and the anode of the stabilizing diode DZ1 are grounded, the emitter of the triode T2 is connected with the power supply end of the warning light and the buzzer, and the collector of the triode T2 is connected with a +3.3V power supply through a resistor R10.

[0020] Preferably, the communication module selects an ESP8266 WiFi module.

[0021] Through the above technical scheme, the beneficial effects of the utility model are as follows:

[0022] 1. In the design of the data acquisition module, the application adopts the combination of a signal preamplification unit, an operational amplifier filtering unit and an analog-to-digital conversion unit, so as to ensure that the weak signal received from the gas sensor can be accurately processed and analyzed, thereby improving the detection accuracy and real-time performance.

[0023] 2. In the system design, the application not only can perform logical judgment according to the preset safety threshold, but also can display the gas concentration data and the system running state in real time, so as to provide timely feedback for the underground personnel. When the gas concentration is detected to be out of the safety range, the control module will activate the sound and light alarm module to issue sound and light signals for alarm, and at the same time, the display module displays the alarm information to the underground personnel, so as to ensure that the personnel can take risk-avoiding measures in time, and a more comprehensive and effective solution is provided for the safety monitoring of the mine operation environment. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a system module structure diagram of the utility model.

[0025] Figure 2 It is a circuit principle diagram of the data acquisition module of one embodiment of the utility model.

[0026] Figure 3 It is a circuit principle diagram of the sound and light alarm module of one embodiment of the utility model.

[0027] Figure 4 It is a circuit principle diagram of the control module of one embodiment of the utility model. DETAILED DESCRIPTION

[0028] The foregoing and other technical contents, features and effects of the utility model will be described in detail below with reference to the accompanying drawings. Figure 1 to the accompanying drawings Figure 4 The detailed description of the embodiments will be clearly presented. The structural contents mentioned in the following embodiments are all referred to the drawings.

[0029] Various exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0030] As shown in Figure 1 The downhole dangerous gas acousto-optic alarm system comprises:

[0031] The data acquisition module is configured to acquire concentration signals of various dangerous gases in the downhole environment through a plurality of gas sensors, which can detect gases including but not limited to methane, carbon monoxide, hydrogen sulfide and other gases that may pose a threat to the safety of miners, and amplify, filter and digitize the acquired signals.

[0032] The control module is configured to receive data from the data acquisition module and perform logical judgment, and determine whether to trigger an alarm according to a system preset safety threshold.

[0033] The acousto-optic alarm module is connected to the control module and starts to work when the control module detects that the gas concentration exceeds the system preset safety threshold, and is configured to issue sound and light signals to alarm.

[0034] The display module is connected to the control module and is configured to display concentration data of the downhole dangerous gas, operation status of the system and alarm information in real time.

[0035] The communication module is connected to the control module and is configured to transmit system data to a ground monitoring center, so that management personnel can monitor the safety condition in the downhole in real time.

[0036] In a specific embodiment, in order to effectively suppress various interference factors in the external environment and ensure the accuracy and reliability of data acquisition, the data acquisition module is designed to process the output signals of the gas sensors, so that the received gas sensor signals can be accurately processed and analyzed. The data acquisition module specifically comprises:

[0037] The signal preamplification unit is configured to preliminarily amplify the weak signals received from the gas sensors to improve the strength of the signals.

[0038] The operational amplifier filtering unit is configured to further amplify the signals and remove noise and interference through filtering to ensure the accuracy and reliability of the signals.

[0039] The analog-to-digital conversion unit is configured to convert the analog signals output by the operational amplifier filtering unit into digital signals, so that the control module can perform subsequent digital processing and analysis.

[0040] In the above, as Figure 2As shown, the signal preamplification unit includes a transistor T1 and a field effect tube Q1, the base of the transistor T1 is connected to one end of a resistor R2 and a resistor R3, the other end of the resistor R2 is connected to the signal output end of the gas sensor J1, the other end of the resistor R3 is grounded with the emitter of the transistor T1, the collector of the transistor T1 is connected to one end of a resistor R5 and the gate of the field effect tube Q1 through a resistor R4, the other end of the resistor R5 is connected to one end of a resistor R1, a capacitor C2 and a capacitor C3 and a power supply VCC, the other end of the resistor R1 is connected to the power supply end of the gas sensor J1, the other end of the capacitor C2 and the capacitor C3 is grounded, and the drain of the field effect tube Q1 is connected to the operational amplifier filtering unit.

[0041] The operational amplifier filtering unit includes an operational amplifier U1, the non-inverting input end of the operational amplifier U1 is connected to the drain of the field effect tube Q1 through a resistor R6 and grounded through a capacitor C4, the inverting input end of the operational amplifier U1 is connected to one end of a resistor R7, a resistor R8 and a capacitor C6, the other end of the resistor R7 is connected to the output end of the operational amplifier U1 and one end of an inductor L1 through a capacitor C5, the other end of the resistor R8 and the capacitor C6 is grounded, and the other end of the inductor L1 is connected to the analog-to-digital conversion unit and grounded through a capacitor C7.

[0042] In the specific working process of the data acquisition module, the weak signal output by the gas sensor is transmitted to the base of the transistor T1 through the resistor R2, the transistor T1 preliminarily amplifies the received signal and outputs the amplified signal to the gate of the field effect tube Q1 through its collector as the input signal of the field effect tube. The field effect tube Q1 here plays a role in further amplifying the signal, and the power supply VCC provides a bias current to the field effect tube Q1 through the resistor R5, which helps to improve the stability and linearity of the amplification circuit. Through the cooperative work of the transistor T1 and the field effect tube Q1, the signal preamplification unit can effectively improve the strength of the gas sensor signal, realizing the preliminary amplification and enhancement of the output signal of the gas sensor.

[0043] Further, the signal output from the drain of the field effect tube Q1 is transmitted to the non-inverting input terminal of the operational amplifier U1 through the resistor R6. The operational amplifier U1, as the core amplifier device of the operational filter unit, can further amplify the input signal and improve the signal processing efficiency. The inverting input terminal of the operational amplifier U1 forms a low-pass filter through the feedback network composed of the resistor R7 and the capacitor C5, which can effectively filter out high-frequency noise and ensure the purity of the signal. At the same time, the capacitor C6, as a bypass capacitor, bypasses the thermal noise generated on the resistor R8 to the ground, thereby reducing the influence of external environmental interference on the signal and enhancing the anti-interference ability of the circuit. The low-pass filter composed of the inductor L1 and the capacitor C7 further filters out high-frequency noise, and the finally output signal is stable and clean, providing a high-quality analog signal input for the analog-to-digital conversion unit. Through the above signal processing process, the downhole dangerous gas sound and light alarm system can accurately detect the change of gas concentration and improve the accuracy and reliability of data acquisition, providing strong support for subsequent gas concentration monitoring and analysis.

[0044] The analog-to-digital conversion unit converts the analog signal output from the operational filter unit into a digital signal through the internal converter, so as to enable the control module to perform subsequent digital processing and analysis. After receiving the data, the control module analyzes and stores the data, and performs logical judgment on the data according to the safety threshold preset by the system. In the specific processing process, the control module will decide whether to trigger the alarm mechanism according to whether the gas concentration exceeds the threshold. If the detected gas concentration exceeds the safety range preset by the system, the control module will immediately activate the sound and light alarm module to issue a warning sound and light signal, and at the same time, display the real-time gas concentration data and alarm information to the downhole personnel through the display module, so as to ensure that the personnel can take risk avoidance measures in time. In addition, the control module also transmits the gas concentration data and alarm state to the ground monitoring center through the communication module, so that the management personnel can monitor the safety situation in the well in real time and intervene when necessary.

[0045] In a specific embodiment, as shown in Figure 3 the sound and light alarm module includes a control circuit, a warning light LED1 and a buzzer LS1. The control circuit includes a triode T2, the base of the triode T2 is connected to one end of a resistor R9, one end of a capacitor C8 and the cathode of a stabilizing diode DZ1, the other end of the resistor R9 is connected to the instruction output end of the control module, the other end of the capacitor C8 and the anode of the stabilizing diode DZ1 are grounded, the emitter of the triode T2 is connected to the power supply end of the warning light LED1 and the buzzer LS1, and the collector of the triode T2 is connected to the +3.3V power supply through a resistor R10.

[0046] When the control module detects that the gas concentration exceeds the preset safety threshold of the system, the command output end will output a high-level signal. This high-level signal is transmitted to the base of the transistor T2 through the resistor R9, making the transistor T2 conductive. At this time, the +3.3V power supply provides power for the warning light LED1 and the buzzer LS1 through the resistor R10 and the transistor T2. The warning light LED1 will turn on, and the buzzer LS1 will emit a sound, thereby realizing the function of sound and light alarm. When the control module no longer needs to alarm, the command output end will output a low-level signal, the transistor T2 is cut off, the warning light LED1 and the buzzer LS1 lose power, and the sound and light alarm stops. Among them, the capacitor C8 and the zener diode DZ1 constitute a protection component, which is used to stabilize the command signal output by the control module.

[0047] In the specific implementation process, as shown in Figure 4 The control module selects the EP3C16Q240C8N microprocessor U2. This microprocessor is a high-performance, low-power Cyclone III series FPGA developed by Intel, which has high-speed signal processing capability. Its internal logic unit and embedded memory can efficiently process digital signals from the analog-to-digital conversion unit, ensuring that the system can respond in real time. At the same time, this microprocessor has rich I / O interface resources, including high-speed serial interfaces, parallel interfaces, and various peripheral interfaces, providing great convenience for the connection of the system with other modules. Through the high-speed serial interface, the control module can quickly exchange data with the communication module, transmitting the downhole gas concentration data and alarm status to the ground monitoring center in real time. The parallel interface ensures fast and stable communication between the control module and the display module. Its high flexibility and programmability make the system easily adapt to different working environments and gas detection needs, providing strong protection for the safety of downhole workers.

[0048] The communication module selects the ESP8266 WiFi module, which supports multiple network protocols and can realize stable wireless communication to ensure real-time uploading of downhole data. Its built-in TCP / IP protocol stack simplifies the complexity of network connection, making system integration more convenient.

[0049] To sum up, first of all, in the design of the data acquisition module, the application adopts the combination of the signal preamplification unit, the operational amplifier filtering unit and the analog-to-digital conversion unit, which ensures that the weak signal received from the gas sensor can be accurately processed and analyzed, thereby improving the detection accuracy and real-time performance. Secondly, in the system design, the application not only can make logical judgment according to the preset safety threshold, but also can display the gas concentration data and the system running state in real time, providing timely feedback for the personnel underground. When the gas concentration is detected to be out of the safety range, the control module will activate the sound and light alarm module to issue sound and light signals for alarm, and at the same time, the display module will show the alarm information to the personnel underground, ensuring that the personnel can take risk avoidance measures in time, and providing a more comprehensive and effective solution for the safety monitoring of the mine operation environment.

[0050] The above is a further detailed description of the utility model made in combination with the specific embodiments, and the utility model specific implementation cannot be limited to this; for the skilled in the art and related technical field, the expansion, operation method and data replacement made on the basis of the utility model technical scheme idea premise should be within the protection scope of the utility model.

Claims

1. A photoacoustic alarm system for dangerous gases in a mine, characterized in that The application relates to a downhole dangerous gas concentration monitoring system. The application comprises: a data acquisition module for collecting concentration signals of various dangerous gases in a downhole environment through a plurality of gas sensors and performing amplification filtering and digital conversion processing on the collected signals; a control module for receiving data of the data acquisition module and performing logical judgment, judging whether to trigger an alarm according to a system preset safety threshold; an acousto-optic alarm module connected with the control module, which is started to work when the control module detects that the gas concentration exceeds the system preset safety threshold, and is used for issuing sound and light signals to perform alarm; a display module connected with the control module, which is used for displaying concentration data of downhole dangerous gases and running state and alarm information of the system in real time; 2. The photoacoustic alarm system for dangerous gases in a well according to claim 1, characterized in that a communication module connected with the control module, which is used for transmitting system data to a ground monitoring center, so that managers can monitor the safety condition in the downhole in real time. The data acquisition module further comprises: a signal preamplification unit for preliminarily amplifying weak signals received from the gas sensors to improve the strength of the signals; an operational amplifier filtering unit for further amplifying the signals and removing noise and interference through filtering to ensure the accuracy and reliability of the signals; 3. The photoacoustic alarm system for dangerous gases in a well according to claim 2, characterized in that an analog-to-digital conversion unit for converting analog signals output by the operational amplifier filtering unit into digital signals so that the control module performs subsequent digital processing and analysis.

4. The photoacoustic alarm system for dangerous gases in a well according to claim 3, characterized in that The signal preamplification unit comprises a triode T1 and a field effect tube Q1, the base of the triode T1 is connected with one end of a resistor R2 and a resistor R3, the other end of the resistor R2 is connected with a signal output end of the gas sensor, the other end of the resistor R3 is grounded with the emitter of the triode T1, the collector of the triode T1 is connected with the gate of the field effect tube Q1 and one end of a resistor R5 through a resistor R4, the other end of the resistor R5 is connected with one end of a resistor R1, a capacitor C2 and a capacitor C3 and a power supply VCC, the other end of the resistor R1 is connected with a power supply end of the gas sensor, the other end of the capacitor C2 and the capacitor C3 is grounded, and the drain of the field effect tube Q1 is connected with the operational amplifier filtering unit.

5. The photoacoustic alarm system for dangerous gases in a mine according to any of claims 1 to 4, characterized in that, The operational amplifier filtering unit comprises an operational amplifier U1, the non-inverting input end of the operational amplifier U1 is connected with the drain of the field effect tube Q1 through a resistor R6 and grounded through a capacitor C4, the inverting input end of the operational amplifier U1 is connected with one end of a resistor R7, a resistor R8 and a capacitor C6, the other end of the resistor R7 is connected with the output end of the operational amplifier U1 and one end of an inductor L1 through a capacitor C5, the other end of the resistor R8 and the capacitor C6 is grounded, and the other end of the inductor L1 is connected with the analog-to-digital conversion unit and grounded through a capacitor C7.

6. The photoacoustic alarm system for dangerous gases in a well according to claim 5, characterized in that, The control module selects an EP3C16Q240C8N microprocessor. The acousto-optic alarm module comprises a control circuit, a warning lamp and a buzzer, the control circuit comprises a triode T2, the base of the triode T2 is connected with one end of a resistor R9, a capacitor C8 and the cathode of a stabilizing diode DZ1, the other end of the resistor R9 is connected with an instruction output end of the control module, the other end of the capacitor C8 and the anode of the stabilizing diode DZ1 is grounded, the emitter of the triode T2 is connected with a power supply end of the warning lamp and the buzzer, and the collector of the triode T2 is connected with a +3.3V power supply through a resistor R10.

7. The photoacoustic alarm system for hazardous gases downhole according to claim 1, characterized in that, The communication module selects ESP8266 WiFi module.

Images