Detection system of gas pump

Abstract

The utility model provides a detection system of a gas pump, and belongs to the technical field of gas detection. The detection system comprises a first pressure detection module, a second pressure detection module, a subtraction module, an absolute value module, a pressure comparison module and an alarm module, the first pressure detection module is used for detecting the inlet pressure of the gas pump; the second pressure detection module is used for detecting the outlet pressure of the gas pump; the first pressure detection module is connected with a first input end of the subtraction module, the second pressure detection module is connected with a second input end of the subtraction module, and an output end of the subtraction module is connected with an input end of the absolute value module; the output end of the absolute value module is connected with the input end of the pressure comparison module, and the output end of the pressure comparison module is connected with the control end of the alarm module. The pressure abnormity of the gas pump can be detected and alarmed.

Description

Technical Field

[0001] This application relates to the field of gas detection technology, and in particular to a gas pump detection system. Background Technology

[0002] In mining operations such as coal mining, effective gas extraction and safety monitoring are crucial. As a key piece of equipment, the operating status of gas pumps directly affects production safety and efficiency.

[0003] When a gas pump is working, the gas pressure often fluctuates significantly due to the complex underground environment, such as changes in geological structure, equipment vibration, and fluctuations in gas composition. If the abnormal gas pump pressure is not detected in time, it may lead to gas leakage, causing serious safety accidents such as explosions and poisoning, resulting in casualties and huge economic losses. At the same time, unstable pressure will also affect the gas extraction volume and reduce mining efficiency.

[0004] Therefore, there is an urgent need for a detection system that can detect abnormal gas pump pressure and issue an alarm. Utility Model Content

[0005] This application provides a gas pump detection system that can detect abnormal gas pump pressure and issue an alarm.

[0006] In a first aspect, embodiments of this application provide a gas pump detection system, including: a first pressure detection module, a second pressure detection module, a subtraction module, an absolute value module, a pressure comparison module, and an alarm module;

[0007] The first pressure detection module is used to detect the inlet pressure of the gas pump; the second pressure detection module is used to detect the outlet pressure of the gas pump; the first pressure detection module is connected to the first input terminal of the subtraction module, the second pressure detection module is connected to the second input terminal of the subtraction module, the output terminal of the subtraction module is connected to the input terminal of the absolute value module; the output terminal of the absolute value module is connected to the input terminal of the pressure comparison module, and the output terminal of the pressure comparison module is connected to the control terminal of the alarm module.

[0008] In one exemplary embodiment of this application, the circuit structure of the first pressure detection module and the second pressure detection module are the same;

[0009] The first pressure detection module includes: a pressure sensor L1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, and a first amplifier U1.

[0010] Wherein, the first output terminal of the pressure sensor L1 is connected to the inverting input terminal of the first amplifier U1 through resistor R2, the second output terminal of the pressure sensor L1 is connected to the non-inverting input terminal of the first amplifier U1 through resistor R3, the power supply terminal of the pressure sensor L1 is connected to the first power supply VDD, and the ground terminal of the pressure sensor L1 is grounded.

[0011] The first terminal of resistor R4 is connected to the inverting input terminal of the first amplifier U1; the second terminal of resistor R4 is grounded.

[0012] The output terminal of the first amplifier U1 is connected to the first terminal of the resistor R5, and the second terminal of the resistor R5 is connected to the first input terminal of the subtraction module.

[0013] The first terminal of capacitor C1 is connected to the second terminal of resistor R5; the second terminal of capacitor C1 is grounded.

[0014] In one exemplary embodiment of this application, operational amplifier U3 and resistor R11;

[0015] The output terminal of the first pressure detection module is connected to the non-inverting input terminal of the operational amplifier U3;

[0016] The output of the second pressure detection module is connected to the inverting input of the operational amplifier U3;

[0017] The output terminal of the operational amplifier U3 is connected to the non-inverting input terminal of the operational amplifier U3 through the resistor R11, and the output terminal of the operational amplifier U3 is connected to the input terminal of the absolute value module.

[0018] In one exemplary embodiment of this application,

[0019] The absolute value module includes: diode D1, diode D2, diode D3, resistor R12, resistor R15, and operational amplifier U4;

[0020] The output terminal of the subtraction module is connected to the cathode of the diode D1, and the anode of the diode D1 is connected to the inverting input terminal of the operational amplifier U4.

[0021] The output terminal of the subtraction module is connected to the anode of the diode D2, and the cathode of the diode D2 is connected to the non-inverting input terminal of the operational amplifier U4.

[0022] The output terminal of the operational amplifier U4 is connected to the anode of the diode D3, and the cathode of the diode D3 is grounded through the resistor R12;

[0023] The non-inverting input terminal of the operational amplifier U4 is grounded through the resistor R15;

[0024] The output terminal of the operational amplifier U4 is connected to the input terminal of the comparator module.

[0025] In one exemplary embodiment of this application, the comparison module includes: comparator U5;

[0026] The inverting input of comparator U5 is connected to the output of the absolute value module.

[0027] The non-inverting input of the comparator U5 is connected to the reference voltage VM;

[0028] The output of the comparator U5 is connected to the control terminal of the alarm module.

[0029] In one exemplary embodiment of this application, the alarm module includes: a resistor R13, a transistor Q1, and a buzzer U6;

[0030] The output terminal of the absolute value module is connected to the base of the transistor Q1 through the resistor R13;

[0031] The collector of transistor Q1 is connected to the second power supply terminal VCC; the emitter of transistor Q1 is connected to the first terminal of buzzer U6; and the second terminal of buzzer U6 is grounded.

[0032] In one exemplary embodiment of this application, the gas pump detection system further includes: a first working indicator module and a second working indicator module; wherein the first working indicator module and the second working indicator module have the same circuit structure;

[0033] The first working indicator module is connected to the output terminal of the first pressure detection module;

[0034] The second working indicator module is connected to the output terminal of the second pressure detection module.

[0035] The beneficial effects of the gas pump detection system provided in this application are as follows: This application, through a pressure detection module and collaborative calculations between modules, can capture changes in gas pump pressure and promptly detect pressure anomalies. Simultaneously, the alarm is activated very quickly upon detecting a pressure anomaly, effectively addressing sudden pressure changes in the gas pump. Therefore, this timely and effective alarm mechanism can significantly reduce the risk of safety accidents caused by abnormal gas pump pressure, ensuring the safety of personnel and property at coal mines and other mining sites. It also helps maintain the stable operation of gas extraction and improves mining efficiency. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of a gas pump detection system provided in an embodiment of this application;

[0038] Figure 2 This is a circuit diagram of the first pressure detection module provided in an embodiment of this application;

[0039] Figure 3 This is a circuit diagram of a gas pump detection system provided in an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of another gas pump detection system provided in an embodiment of this application. Detailed Implementation

[0041] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this solution, not all of them. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this solution.

[0042] The term "comprising" and any other variations thereof in the specification, claims, and accompanying drawings of this invention mean "including but not limited to," and are intended to cover a non-exclusive inclusion, not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish different objects, not to describe a specific order.

[0043] The implementation of this application will be described in detail below with reference to the specific accompanying drawings:

[0044] Figure 1 This is a schematic diagram of a gas pump detection system provided in an embodiment of this application. (Refer to...) Figure 1 The gas pump's detection system includes:

[0045] The system comprises a first pressure detection module 10, a second pressure detection module 11, a subtraction module 12, an absolute value module 13, a pressure comparison module 14, and an alarm module 15.

[0046] The first pressure detection module is used to detect the inlet pressure of the gas pump; the second pressure detection module is used to detect the outlet pressure of the gas pump; the first pressure detection module 10 is connected to the first input terminal of the subtraction module 12, the second pressure detection module 11 is connected to the second input terminal of the subtraction module 12, the output terminal of the subtraction module 12 is connected to the input terminal of the absolute value module 13; the output terminal of the absolute value module 13 is connected to the input terminal of the pressure comparison module 14, and the output terminal of the pressure comparison module 14 is connected to the control terminal of the alarm module 15.

[0047] In this example, the first pressure detection module 10 is used to obtain the inlet pressure of the gas pump, the second pressure detection module 11 is used to obtain the outlet pressure of the gas pump, the subtraction module 12 is used to subtract the inlet pressure and the outlet pressure to obtain the pressure difference value, and the absolute value module 13 is used to take the absolute value of the pressure difference value. This is because a low inlet pressure of the gas pump may mean insufficient gas supply, and a high outlet pressure may indicate pipeline blockage or gas pump failure. Therefore, the sign of the pressure difference is not important. This embodiment only focuses on the magnitude of the difference value. The pressure comparison module 14 compares the pressure difference value after taking the absolute value with the reference value. If it exceeds the normal range, the alarm module 15 activates the alarm to remind the staff that the gas pump may be abnormal.

[0048] This embodiment, through a pressure detection module and collaborative calculations between modules, can capture changes in gas pump pressure and promptly detect pressure anomalies. Simultaneously, the alarm is activated very quickly upon detecting an anomaly, effectively addressing sudden pressure changes in the gas pump. Therefore, this timely and effective alarm mechanism can reduce the risk of safety accidents caused by abnormal gas pump pressure, ensuring the safety of personnel and property at coal mines and other mining sites. It also helps maintain the stable operation of gas drainage work and improves mining efficiency.

[0049] This application accurately reflects the actual pressure difference between the inlet and outlet of a gas pump by separately detecting the inlet and outlet pressures and calculating the absolute value of the difference. Comparing this difference with a preset value triggers an alarm, enabling timely detection of abnormal pressure conditions during gas pump operation, such as excessively low inlet pressure or excessively high outlet pressure. This helps prevent safety accidents such as gas leaks and equipment damage, ensuring the stable operation of the gas pump and safe production in coal mines and other similar locations.

[0050] In one exemplary embodiment of this application, the first pressure detection module 10 and the second pressure detection module 11 have the same circuit structure;

[0051] Figure 2 A circuit diagram of a first pressure detection module provided in an embodiment of this application; wherein, the first pressure detection module 10 includes: a pressure sensor L1, resistors R2, R3, R4, R5, capacitor C1, and a first amplifier U1;

[0052] Among them, the first output terminal of pressure sensor L1 is connected to the inverting input terminal of the first amplifier U1 through resistor R2, the second output terminal of pressure sensor L1 is connected to the non-inverting input terminal of the first amplifier U1 through resistor R3, the power supply terminal of pressure sensor L1 is connected to the first power supply VDD, and the ground terminal of pressure sensor L1 is grounded.

[0053] The first terminal of resistor R4 is connected to the inverting input terminal of the first amplifier U1; the second terminal of resistor R4 is grounded.

[0054] The output terminal of the first amplifier U1 is connected to the first terminal of the resistor R5, and the second terminal of the resistor R5 is connected to the first input terminal of the subtraction module 12.

[0055] The first terminal of capacitor C1 is connected to the second terminal of resistor R5; the second terminal of capacitor C1 is grounded.

[0056] In this embodiment, the power supply terminal of the pressure sensor L1 is connected to the first power supply VDD to obtain the working power supply and perform operation. The ground terminal of the pressure sensor L1 is grounded to ensure the reference potential of the circuit. The pressure sensor L1 senses the pressure and outputs an electrical signal to the first amplifier U1. The first amplifier U1 amplifies the electrical signal and outputs it to the subtraction module 12. In this embodiment, the ratio of the electrical signal input to the first amplifier U1 is adjusted by resistors R2 and R3. Resistor R4 stabilizes the potential of the inverting input terminal of the first amplifier U1. Resistor R5 and capacitor C1 form a filter circuit to remove noise in the amplified electrical signal and finally output a relatively pure pressure detection signal to the subtraction module.

[0057] For example, the pressure sensor L1 can be a high-precision model with strong anti-interference capabilities, such as a piezoresistive pressure sensor, which can accurately detect minute pressure changes. Secondly, in the complex electromagnetic environment of a coal mine, the first amplifier U1 can be an operational amplifier with a high common-mode rejection ratio to effectively suppress common-mode interference and ensure the accuracy of the pressure detection signal; for example, when large motor equipment is operating near the gas pump and generating electromagnetic interference, this circuit can stably output a reliable pressure detection signal.

[0058] In this embodiment, after the pressure sensor converts the pressure signal into an electrical signal, it is amplified by an amplifier and then filtered by a filter circuit composed of resistor R5 and capacitor C1 to remove noise, resulting in a stable and accurate pressure detection signal. This effectively improves the accuracy and reliability of pressure detection and reduces the impact of external interference on the detection results.

[0059] Figure 3 This is a circuit diagram of a gas pump detection system provided in an embodiment of this application; see reference. Figure 3 ,

[0060] In one exemplary embodiment of this application, operational amplifier U3 and resistor R11;

[0061] The output of the first pressure detection module 10 is connected to the non-inverting input of the operational amplifier U3;

[0062] The output of the second pressure detection module is connected to the inverting input of the operational amplifier U3;

[0063] The output terminal of operational amplifier U3 is connected to the non-inverting input terminal of operational amplifier U3 through resistor R11, and the output terminal of operational amplifier U3 is connected to the input terminal of absolute value module 13.

[0064] In this embodiment, the output of the first pressure detection module is connected to the non-inverting input of operational amplifier U3, and the output of the second pressure detection module is connected to the inverting input of operational amplifier U3. This utilizes the differential amplification characteristic of the operational amplifier to perform a subtraction operation on the two pressure signals, obtaining the pressure difference signal from the subtraction. In this embodiment, resistor R11 is a feedback resistor used to adjust the amplification factor of operational amplifier U3, ensuring that the output pressure difference signal is within a suitable range.

[0065] For example, resistor R11 can be a variable resistor, which can adapt to the pressure detection requirements of different gas pumps. During the commissioning phase, technicians can flexibly adjust the amplification factor according to the actual pressure range. For example, for low-pressure gas pumps, the resistance value of resistor R11 can be increased to improve the amplification factor and make the pressure difference signal more obvious; for high-pressure gas pumps, the resistance value of resistor R11 can be decreased to prevent the signal from being too large and exceeding the processing range of absolute value module 13.

[0066] In this embodiment, the differential amplification characteristic of the operational amplifier is used to realize the subtraction operation of the inlet and outlet pressure signals, which can accurately calculate the pressure difference. The feedback resistor R11 can adjust the amplification factor so that the output pressure difference signal is within a suitable range, ensuring that the entire detection system can detect and process the pressure difference more accurately.

[0067] In one exemplary embodiment of this application, the absolute value module 13 includes: diode D1, diode D2, diode D3, resistor R12, resistor R15, and operational amplifier U4;

[0068] The output of subtraction module 12 is connected to the cathode of diode D1, and the anode of diode D1 is connected to the inverting input of operational amplifier U4.

[0069] The output of subtraction module 12 is connected to the anode of diode D2, and the cathode of diode D2 is connected to the non-inverting input of operational amplifier U4.

[0070] The output terminal of operational amplifier U4 is connected to the anode of diode D3, and the cathode of diode D3 is grounded through resistor R12;

[0071] The non-inverting input of operational amplifier U4 is grounded through resistor R15;

[0072] The output of operational amplifier U4 is connected to the input of the comparator module.

[0073] In this embodiment, diodes D1, D2, and D3, along with resistors R12 and R15 and operational amplifier U4, work together.

[0074] When the subtraction module outputs a positive pressure difference value, diode D1 is turned on and diode D2 is turned off. The pressure difference signal enters the inverting input of operational amplifier U4 via D1. When the subtraction module outputs a negative value, diode D2 is turned on and D1 is turned off. The pressure difference signal enters the non-inverting input of operational amplifier U4 via D2. Operational amplifier U4 and diode D3, etc., form an absolute value operation circuit, which converts the input pressure difference signal into absolute value form and outputs it to the comparison module, ensuring that the subsequent comparison is of the absolute value of the pressure difference.

[0075] For example, diodes D1, D2, and D3 can be fast recovery diodes, which can quickly respond to positive and negative changes in the pressure difference signal and ensure the timeliness of absolute value calculation; in projects with extremely high requirements for real-time detection, they can effectively reduce signal processing delay.

[0076] In this embodiment, the pressure difference signal output by the subtraction module can be converted into an absolute value form. Regardless of whether the pressure difference is positive or negative, it can be output to the comparison module in a uniform absolute value form, improving the accuracy and efficiency of the system's pressure difference judgment.

[0077] In one exemplary embodiment of this application, the comparison module includes: comparator U5;

[0078] The inverting input of comparator U5 is connected to the output of absolute value module 13.

[0079] The non-inverting input of comparator U5 is connected to the reference voltage VM;

[0080] The output of comparator U5 is connected to the control terminal of alarm module 15.

[0081] In this embodiment, the inverting input of comparator U5 receives the absolute pressure difference signal output by the absolute value module, and the non-inverting input is connected to the reference voltage VM. Comparator U5 compares the magnitudes of the two input signals. If the absolute pressure difference exceeds the threshold corresponding to the reference voltage, it outputs a high or low level (depending on the comparator type) to trigger the alarm module. The reference voltage VM can be preset according to the pressure difference range during normal operation of the gas pump.

[0082] For example, the normal pressure difference range of a gas pump may vary in different seasons or under different operating conditions. By adjusting the reference voltage VM, the detection system can continuously and accurately determine the operating status of the gas pump.

[0083] In this embodiment, an alarm is triggered when the absolute value of the pressure difference exceeds the reference voltage, which can quickly and accurately determine whether the gas pump pressure is abnormal, effectively ensuring the safe operation of the gas pump.

[0084] In one exemplary embodiment of this application, the alarm module 15 includes: a resistor R13, a transistor Q1, and a buzzer U6;

[0085] The output of absolute value module 13 is connected to the base of transistor Q1 through resistor R13;

[0086] The collector of transistor Q1 is connected to the second power supply terminal VCC; the emitter of transistor Q1 is connected to the first terminal of buzzer U6; the second terminal of buzzer U6 is grounded.

[0087] In this embodiment, the absolute value module output signal is input to the base of transistor Q1 after being current-limited by resistor R13. When the input signal reaches a certain amplitude, transistor Q1 is turned on, and the second power supply terminal VCC supplies power to buzzer U6. Buzzer U6 emits an alarm sound to remind the staff of the abnormal pressure difference of the gas pump.

[0088] For example, to enhance the alarm effect, an LED can be added to the buzzer U6 circuit and connected in parallel with buzzer U6. When transistor Q1 is turned on, not only does buzzer U6 sound, but the LED also lights up, achieving a dual sound and light alarm; because in a noisy working environment, the light signal can more effectively attract the attention of staff. Furthermore, in this embodiment, a relay can be connected in series between the emitter of transistor Q1 and buzzer U6. If remote alarm control is required, the remote alarm device can be controlled through the relay contacts.

[0089] Figure 4 This is a schematic diagram of the structure of the second gas pump detection system provided in the embodiments of this application.

[0090] In one exemplary embodiment of this application, the gas pump detection system further includes: a first working indicator module 16 and a second working indicator module 17; wherein the first working indicator module 16 and the second working indicator module 17 have the same circuit structure;

[0091] The first working indicator module 16 is connected to the output terminal of the first pressure detection module 10;

[0092] The second working indicator module 17 is connected to the output terminal of the second pressure detection module 11.

[0093] In this embodiment, the working indicator module can intuitively display whether the pressure detection module is working properly. For example, when the pressure detection module output signal is within the normal range, the working indicator module displays a green light; if the pressure detection module malfunctions or outputs abnormally, the working indicator module displays a red light. In this embodiment, the working status of the gas pump detection system can be viewed through the first working indicator module 16 and the second working indicator module 17, which improves management efficiency.

[0094] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A detection system for a gas pump, characterized in that, include: The system includes a first pressure detection module, a second pressure detection module, a subtraction module, an absolute value module, a pressure comparison module, and an alarm module. The first pressure detection module is used to detect the inlet pressure of the gas pump; the second pressure detection module is used to detect the outlet pressure of the gas pump; the first pressure detection module is connected to the first input terminal of the subtraction module, the second pressure detection module is connected to the second input terminal of the subtraction module, the output terminal of the subtraction module is connected to the input terminal of the absolute value module; the output terminal of the absolute value module is connected to the input terminal of the pressure comparison module, and the output terminal of the pressure comparison module is connected to the control terminal of the alarm module.

2. The gas pump detection system as described in claim 1, characterized in that, The first pressure detection module and the second pressure detection module have the same circuit structure; The first pressure detection module includes: a pressure sensor L1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, and a first amplifier U1. Wherein, the first output terminal of the pressure sensor L1 is connected to the inverting input terminal of the first amplifier U1 through resistor R2, the second output terminal of the pressure sensor L1 is connected to the non-inverting input terminal of the first amplifier U1 through resistor R3, the power supply terminal of the pressure sensor L1 is connected to the first power supply VDD, and the ground terminal of the pressure sensor L1 is grounded. The first terminal of resistor R4 is connected to the inverting input terminal of the first amplifier U1; the second terminal of resistor R4 is grounded. The output terminal of the first amplifier U1 is connected to the first terminal of the resistor R5, and the second terminal of the resistor R5 is connected to the first input terminal of the subtraction module. The first terminal of capacitor C1 is connected to the second terminal of resistor R5; the second terminal of capacitor C1 is grounded.

3. The gas pump detection system as described in claim 2, characterized in that, The subtraction module includes: operational amplifier U3 and resistor R11; The output terminal of the first pressure detection module is connected to the non-inverting input terminal of the operational amplifier U3; The output of the second pressure detection module is connected to the inverting input of the operational amplifier U3; The output terminal of the operational amplifier U3 is connected to the non-inverting input terminal of the operational amplifier U3 through the resistor R11, and the output terminal of the operational amplifier U3 is connected to the input terminal of the absolute value module.

4. The gas pump detection system as described in claim 1, characterized in that, The absolute value module includes: diode D1, diode D2, diode D3, resistor R12, resistor R15, and operational amplifier U4; The output terminal of the subtraction module is connected to the cathode of the diode D1, and the anode of the diode D1 is connected to the inverting input terminal of the operational amplifier U4. The output terminal of the subtraction module is connected to the anode of the diode D2, and the cathode of the diode D2 is connected to the non-inverting input terminal of the operational amplifier U4. The output terminal of the operational amplifier U4 is connected to the anode of the diode D3, and the cathode of the diode D3 is grounded through the resistor R12; The non-inverting input terminal of the operational amplifier U4 is grounded through the resistor R15; The output terminal of the operational amplifier U4 is connected to the input terminal of the comparator module.

5. The gas pump detection system as described in claim 1, characterized in that, The comparison module includes: comparator U5; The inverting input of comparator U5 is connected to the output of the absolute value module. The non-inverting input of the comparator U5 is connected to the reference voltage VM; The output of the comparator U5 is connected to the control terminal of the alarm module.

6. The gas pump detection system as described in claim 1, characterized in that, The alarm module includes: resistor R13, transistor Q1, and buzzer U6; The output terminal of the absolute value module is connected to the base of the transistor Q1 through the resistor R13; The collector of transistor Q1 is connected to the second power supply terminal VCC; the emitter of transistor Q1 is connected to the first terminal of buzzer U6; and the second terminal of buzzer U6 is grounded.

7. The gas pump detection system as described in claim 1, characterized in that, Also includes: A first working indicator module and a second working indicator module; wherein the first working indicator module and the second working indicator module have the same circuit structure; The first working indicator module is connected to the output terminal of the first pressure detection module; The second working indicator module is connected to the output terminal of the second pressure detection module.

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