Infrared methane detection alarm instrument

Abstract

The utility model discloses an infrared methane detection alarm apparatus, comprising a battery unit which supplies power to a main control circuit unit, an infrared sensor and an air pressure sensor; the main control circuit unit is electrically connected with and controls the infrared sensor, the air pressure sensor and the digital display circuit unit; the key circuit unit is electrically connected with and controls the main control circuit unit; the electric quantity output end of the battery unit is electrically connected with the main control circuit unit, the infrared sensor and the air pressure sensor through the first voltage stabilizing circuit unit and the second voltage stabilizing circuit unit. The detection alarm instrument is additionally provided with the air pressure sensor for detecting the current air pressure, so that the methane value measured by the infrared sensor can be conveniently corrected according to the difference between the current air pressure value and the standard air pressure value in the later period, the measurement error caused by air pressure fluctuation is overcome, and the measurement precision of the instrument is improved; and through the voltage stabilizing circuit, measurement errors caused by voltage fluctuation in the circuit are prevented, and the measurement precision of the instrument is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection instruments, in particular to an infrared methane detection alarm. Background Art

[0002] Traditionally, catalytic combustion sensors and infrared methane sensors have been used primarily for methane detection. However, these sensors face significant challenges and limitations in practical applications. Because the gas detection element of catalytic combustion sensors requires direct contact with the gas being detected, they are susceptible to interference from environmental factors such as temperature, humidity, and the presence of chemicals, all of which can affect the sensor's accuracy and reliability.

[0003] Therefore, in some occasions with higher detection requirements, methane detection instruments often use detection instruments with infrared methane sensors. This type of detection instrument can obviously overcome the above-mentioned interference, but the atmospheric pressure in the on-site environment has a greater impact on the measurement accuracy of the infrared methane sensor, and the voltage fluctuation of the instrument circuit connected to the sensor will also cause inaccurate measurement results, ultimately leading to large errors in the instrument's methane detection results. Utility Model Content

[0004] The purpose of the utility model is to provide an infrared methane detection alarm to solve the problem that detection instruments with infrared methane sensors are affected by air pressure and voltage fluctuations, causing inaccurate measurement results and resulting in low accuracy of the instrument's detection results.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An infrared methane detection alarm, comprising:

[0007] a battery unit, wherein the battery unit supplies power to the main control circuit unit, the infrared sensor, and the air pressure sensor;

[0008] A main control circuit unit, the main control circuit unit being electrically connected to and controlling the infrared sensor, the air pressure sensor, and the digital display circuit unit;

[0009] a key circuit unit, the key circuit unit being electrically connected to and controlling the main control circuit unit;

[0010] in,

[0011] The power output end of the battery unit is electrically connected to the main control circuit unit, the infrared sensor and the air pressure sensor through the first voltage stabilizing circuit unit and the second voltage stabilizing circuit unit respectively.

[0012] A further technical solution is: a voltage measurement circuit unit is electrically connected between the main control circuit unit and the battery unit.

[0013] A further technical solution is: a charging control circuit unit is electrically connected between the main control circuit unit and the battery unit.

[0014] A further technical solution is: the main control circuit unit is electrically connected to an audible and visual alarm circuit unit.

[0015] A further technical solution is: the main control circuit unit is an MCU chip.

[0016] A further technical solution is that the first voltage stabilizing circuit unit and the second voltage stabilizing circuit unit are both .V voltage stabilizing modules.

[0017] A further technical solution is: the infrared sensor is a G4 infrared sensor.

[0018] A further technical solution is: the air pressure sensor is a BMP280 air pressure sensor.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The utility model proposes an infrared methane detection alarm. On the basis of the traditional methane value measurement based on the infrared sensor, an air pressure sensor is added to detect the current air pressure. This makes it convenient for staff to correct the methane value measured by the infrared sensor according to the difference between the current air pressure value and the standard air pressure value, overcomes the measurement error caused by air pressure fluctuations, and improves the measurement accuracy of the instrument. In addition, a voltage stabilizing circuit is used to prevent measurement errors caused by voltage fluctuations in the circuit, further improving the measurement accuracy of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a circuit structure block diagram of an infrared methane detection alarm device of the present utility model.

[0022] Figure 2 For this utility model Figure 1 Circuit schematic diagram of the main control circuit unit.

[0023] Figure 3 For this utility model Figure 1 Schematic diagram of the circuit of the first voltage stabilizing circuit unit and the second voltage stabilizing circuit unit.

[0024] Figure 4 For this utility model Figure 1 Circuit schematic diagram of the charging control circuit unit.

[0025] Figure 5 For this utility model Figure 1 Circuit schematic diagram of the sound and light alarm circuit unit.

[0026] Figure numerals: 1. first voltage-stabilizing circuit unit; 2. infrared sensor; 3. air pressure sensor; 4. battery unit; 5. voltage measurement circuit unit; 6. second voltage-stabilizing circuit unit; 7. main control circuit unit; 8. digital display circuit unit; 9. charging control circuit unit; 10. sound and light alarm circuit unit; 11. key circuit unit. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] Example 1:

[0034] This embodiment Figure 1 、 Figure 2 and Figure 3 As shown, an infrared methane detection alarm device includes:

[0035] The battery unit 4 supplies power to the main control circuit unit 7, the infrared sensor 2 and the air pressure sensor 3;

[0036] A main control circuit unit 7, which is electrically connected to and controls the infrared sensor 2, the air pressure sensor 3 and the digital display circuit unit 8;

[0037] A key circuit unit 11, the key circuit unit 11 is electrically connected to and controls the main control circuit unit 7;

[0038] in,

[0039] The power output end of the battery unit 4 is electrically connected to the main control circuit unit 7, the infrared sensor 2 and the air pressure sensor 3 through the first voltage stabilizing circuit unit 1 and the second voltage stabilizing circuit unit 6 respectively.

[0040] The battery unit 4 (generally a rechargeable battery) supplies power to the infrared sensor 2, the air pressure sensor 3, and the main control circuit unit 7 through the first voltage stabilizing circuit unit 1 and the second voltage stabilizing circuit unit 6, respectively, to ensure voltage stability and prevent voltage fluctuations in the circuit from affecting the measurement results; the infrared sensor 2 and the air pressure sensor 3 send measurement data to the main control circuit unit 7 via digital signals, and the measurement values are displayed on the display screen of the digital display circuit unit 8 through the calculation program written in the main control circuit unit 7.

[0041] Of course, the methane value and the current air pressure value can also be directly displayed on the display screen of the circuit unit 8, and then the methane value measured by the infrared sensor can be corrected according to the difference between the current air pressure value and the standard air pressure value, thereby overcoming the measurement error caused by air pressure fluctuations and improving the measurement accuracy of the instrument.

[0042] It is worth noting that the methane value correction process based on this instrument is as follows:

[0043] S1. Calibration: introduce standard gas methane for calibration, and record and save the current air pressure value P0;

[0044] S2. Measure and correct: The instrument is turned on and enters the measurement state. The main control circuit unit 7 controls the infrared sensor 2 and the air pressure sensor 3 to collect the methane value A0 and the air pressure value P1;

[0045] S3, the main control circuit unit 7 retrieves the air pressure value P0 during calibration;

[0046] S4. Correct A1 according to the following formula: (P0 / P1)*A0······A1=corrected value;

[0047] S5 . Output the corrected methane value A1 and display it on the display screen of the digital display circuit unit 8 .

[0048] Preferably, a voltage measurement circuit unit 5 is electrically connected between the main control circuit unit 7 and the battery unit 4 .

[0049] Used to monitor the voltage value in the instrument circuit and facilitate voltage control.

[0050] Preferably, if Figure 4 As shown, a charging control circuit unit 9 is electrically connected between the main control circuit unit 7 and the battery unit 4 .

[0051] Used to charge the battery unit 4.

[0052] Preferably, if Figure 5 As shown, the main control circuit unit 7 is electrically connected to the sound and light alarm circuit unit 10.

[0053] The circuit is equipped with LED lights and alarm speakers, which can directly remind staff when the values exceed the standards, thereby improving safety.

[0054] Preferably, the main control circuit unit 7 is an MCU chip.

[0055] Preferably, the first voltage stabilizing circuit unit 1 and the second voltage stabilizing circuit unit 6 are both 3.3V voltage stabilizing modules.

[0056] Preferably, the infrared sensor 2 is a G4 infrared sensor.

[0057] Preferably, the air pressure sensor 3 is a BMP280 air pressure sensor.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An infrared methane detection alarm, characterized in that: include: A battery unit (4), the battery unit (4) supplies power to the main control circuit unit (7), the infrared sensor (2) and the air pressure sensor (3); A main control circuit unit (7), the main control circuit unit (7) being electrically connected to and controlling the infrared sensor (2), the air pressure sensor (3) and the digital display circuit unit (8); A key circuit unit (11), the key circuit unit (11) being electrically connected to and controlling the main control circuit unit (7); in, The power output end of the battery unit (4) is electrically connected to the main control circuit unit (7), the infrared sensor (2) and the air pressure sensor (3) respectively through the first voltage stabilizing circuit unit (1) and the second voltage stabilizing circuit unit (6).

2. The infrared methane detection alarm according to claim 1, characterized in that: A voltage measurement circuit unit (5) is electrically connected between the main control circuit unit (7) and the battery unit (4).

3. The infrared methane detection alarm according to claim 1, characterized in that: A charging control circuit unit (9) is electrically connected between the main control circuit unit (7) and the battery unit (4).

4. The infrared methane detection alarm according to claim 1, characterized in that: The main control circuit unit (7) is electrically connected to an audible and visual alarm circuit unit (10).

5. The infrared methane detection alarm according to claim 1, characterized in that: The main control circuit unit (7) is an MCU chip.

6. The infrared methane detection alarm according to claim 1, characterized in that: The first voltage stabilizing circuit unit (1) and the second voltage stabilizing circuit unit (6) are both 3.3V voltage stabilizing modules.

7. The infrared methane detection alarm according to claim 1, characterized in that: The infrared sensor (2) is a G4 infrared sensor.

8. The infrared methane detection alarm according to claim 1, characterized in that: The air pressure sensor (3) is a BMP280 air pressure sensor.

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