CN219871135U

CN219871135U - Novel combustible gas sensor module

Info

Publication number: CN219871135U
Application number: CN202320879324.1U
Authority: CN
Inventors: 祁治朋; 张英侠; 张敬兴
Original assignee: Shinva Medical Instrument Co Ltd
Current assignee: Shinva Medical Instrument Co Ltd
Priority date: 2023-04-19
Filing date: 2023-04-19
Publication date: 2023-10-20
Anticipated expiration: 2033-04-19

Abstract

The utility model relates to the technical field of gas sensors, in particular to a novel combustible gas sensor module. The utility model comprises a shell, a sensor probe positioned at the top of the shell, an adjusting component positioned at the bottom of the shell and a control board positioned in the shell, wherein: the shell is arranged in a cube, the front side of the shell is provided with a display module, and a switch is arranged above the display module; the side face of the device is provided with a buzzer module, and the back face of the device is provided with a hook; an adjustment assembly for adjusting the sensitivity of the sensor probe; the control panel comprises a control module, a step-down driving module, a sensor acquisition module, a dual-voltage comparator module and a photoelectric coupler module, wherein the control module compares the gas concentration through the dual-voltage comparator module, and the dual-voltage comparator module is connected with the adjusting component; the control module is connected with the release through the photoelectric coupler module. The utility model has simpler operation.

Description

Novel combustible gas sensor module

Technical Field

The utility model relates to the technical field of gas sensors, in particular to a novel combustible gas sensor module.

Background

In order to detect equipment fire failure and give alarm and processing measures, a sensor for detecting combustible gas is designed. In general, when the organic matters are insufficiently combusted, CO is generated, and whether substances are knocked or smoke is generated is further reacted by detecting the concentration of CO, so that the detection is performed by adopting an MQ series carbon monoxide sensor element. For example, chinese patent CN106645328B discloses a CO concentration detection device and a detection method thereof, which utilize operation parameters of a central processing module and a feedback module to display and control, so as to improve the accuracy of detecting and alarming CO concentration in the environment. However, the improvement of the precision is not hardware, and the adjustment detection process is complex and not portable.

Disclosure of Invention

The utility model aims to solve the technical problems that: the defects of the prior art are overcome, a novel combustible gas sensor module is provided, and the shape of the improved shell is more portable; the new adjusting component is added to cooperate with the double-voltage comparator module to manually adjust the accuracy of the sensor probe, so that the operation is simpler.

The technical scheme of the utility model is as follows:

a novel combustible gas sensor module, includes the casing, is located the sensor probe at casing top, is located the regulation subassembly of casing bottom to and be located the inside control panel of casing, wherein:

the shell is arranged in a cube, the front side of the shell is provided with a display module, and a switch is arranged above the display module; the side face of the device is provided with a buzzer module, and the back face of the device is provided with a hook;

the adjusting assembly is divided into an adjusting module I and an adjusting module II which are respectively arranged at two sides of the bottom of the shell; the adjusting module I and the adjusting module II are used for adjusting the sensitivity of the sensor probe;

the control panel comprises a control module, a step-down driving module, a sensor acquisition module, a dual-voltage comparator module and a photoelectric coupler module, wherein the control module controls the sensor acquisition module to detect the concentration of gas through the step-down driving module, and the sensor acquisition module is connected with the sensor probe; the control module compares the gas concentration through a dual-voltage comparator module, and the dual-voltage comparator module is connected with the adjusting component; the control module is connected with the release through the photoelectric coupler module.

Preferably, the sensor probe detects the abrupt change value of the gas concentration for a certain time and feeds back to the control module; the control module compares the threshold value through the double-voltage comparator module, exceeds the threshold value, drives the buzzer module to alarm, and drives the photoelectric coupler module to disconnect the release, and cuts off the load.

Preferably, the switch comprises a power switch and an alarm reset switch.

Preferably, a battery box is arranged at the back of the shell, and a lithium battery is arranged in the battery box; the lithium battery supplies power to the control panel through the step-down driving module.

Preferably, the display information of the display module comprises gas concentration information and abrupt change values detected by the sensor probe.

Preferably, the sensor probe adopts a model MQ series sensor to detect CO in the combustible gas.

Preferably, the step-down driving module adopts a chip with the model of LM2576S-5.0, and converts a 24V direct current signal of the lithium battery into a 5V direct current signal for driving the sensor acquisition module.

Preferably, the dual-voltage comparator module adopts a dual-voltage comparator with model LM393M/TR, the output switching value is DOUT, the analog value is AOUT, the sensor probe is regulated by regulating the adjustable potentiometer R6, and the adjustable potentiometer R6 is connected with the regulating component.

Preferably, the photoelectric coupler module adopts an optical coupler isolator with the model of FOM3063R2, converts a direct-current switching value signal of the sensor acquisition module into a signal capable of conducting 220V alternating current, and drives the release to be disconnected.

Preferably, the adjusting module I and the adjusting module II are unidirectional adjusting structures, the adjusting module I is used for adjusting down the precision of the sensor probe, and the adjusting module II is used for adjusting up the precision of the sensor probe.

Compared with the prior art, the utility model has the following beneficial effects:

the shape of the improved shell is more portable; adopting an MQ series carbon monoxide sensor element to detect, using an LM393M/TR dual-voltage comparator to process a sensor signal, outputting an amplified level signal, outputting an analog quantity signal and a digital quantity, realizing alarm prompt of a buzzer and an LED lamp, and using a FODM3063R2 optocoupler bidirectional thyristor to realize conduction of an alternating current signal; amplifying and converting signals generated by the MQ series sensor probes; the new adjusting component is added to cooperate with the double-voltage comparator module to manually adjust the accuracy of the sensor probe, so that the operation is simpler.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a front view of the present utility model.

Fig. 2 is a side view of the present utility model.

Fig. 3 is a circuit diagram of sensor acquisition and sensitivity adjustment.

Fig. 4 is a voltage step-down driving circuit diagram of the sensor.

Fig. 5 is a circuit diagram of a buzzer alarm.

Fig. 6 is a circuit diagram of the photo coupler cut-off load.

In the figure: 1. a housing; 2. a switch; 3. a sensor probe; 4. an adjusting module I; 5. an adjusting module II; 6. a display module; 7. a buzzer module; 8. a hook; 9. a dual voltage comparator module; 10. a step-down driving module; 11. and a photo coupler module.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

Example 1

As shown in fig. 1 and 2, the present embodiment provides a novel flammable gas sensor module, which includes a housing 1, a sensor probe 3 located at the top of the housing 1, an adjusting component located at the bottom of the housing 1, and a control board located inside the housing 1, wherein:

the shell 1 is arranged in a cube, the front surface of the shell is provided with a display module 6, and a switch 2 is arranged above the display module 6; the side face of the device is provided with a buzzer module 7, and the back face of the device is provided with a hook 8;

the adjusting components are divided into an adjusting module I4 and an adjusting module II 5 which are respectively arranged at two sides of the bottom of the shell 1; the adjusting module I4 and the adjusting module II 5 are used for adjusting the sensitivity of the sensor probe 3;

the control panel comprises a control module, a step-down driving module 10, a sensor acquisition module, a double-voltage comparator module 9 and a photoelectric coupler module 11, wherein the control module controls the sensor acquisition module to detect the gas concentration through the step-down driving module 10, and the sensor acquisition module is connected with the sensor probe 3; the control module compares the gas concentration through the double-voltage comparator module 9, and the double-voltage comparator module 9 is connected with the adjusting component; the control module is connected with the release through a photoelectric coupler module 11.

Working principle:

based on the MQ-7 sensor probe, the detection of the concentration of CO is realized, an analog signal and a switching value signal are output, the switching value signal comprises a basic direct current signal conduction signal and an alternating current signal conduction signal, and the direct disconnection of a load can be realized by directly carrying a release through the alternating current signal conduction.

The main combustible or smoke-generating plastic products in the electromechanical equipment, the lower graph shows the gas ratio generated when the main plastic type burns, and the phenomenon that whether the combustion or smoke generation occurs can be detected by detecting CO can be known in the table 1.

TABLE 1

The MQ-7 sensor probe detects carbon monoxide in a high-low temperature cycle detection mode, and the conductivity of the sensor increases with the increase of the concentration of the carbon monoxide in the air, so that the sensor can reflect the concentration of the CO in the air.

The switching value DOUT and the analog value AOUT can be output through a circuit based on the LM393M/TR dual-voltage comparator, and the detection sensitivity of the sensor can be adjusted by adjusting R6 (adjustable potentiometer).

The 24V DC signal was converted to a 5VDC DC signal using an LM2576S-5.0 chip implementation, with the 5VD DC signal used to drive the sensor circuit. The sensor is directly powered by 24V, and is commonly used in the industrial field.

External display of signals is achieved based on the triode, when the gas temperature reaches a set value, the buzzer sounds, and the LED red indicator lamp is on.

Based on the FOM3063R2 photoelectric coupler module, the detected direct current switching value signal is converted into a signal capable of conducting 220V alternating current, and the function of driving the release is achieved.

The sensor probe is small, the detection is sensitive, digital quantity signals and analog quantity signals can be output to the control module to carry out more advanced judgment, and the release can also be used for directly cutting off the load. And the display module has an intuitive external display function, and the buzzer and the LED lamp give an alarm. And is compatible with mainstream industrial 24V power supply.

Example 2

On the basis of the embodiment 1, the sensor probe 3 detects the abrupt change value of the gas concentration for a certain time and feeds back to the control module; the control module compares the threshold value through the double-voltage comparator module 9, exceeds the threshold value, drives the buzzer module 7 to alarm (as shown in fig. 5), and drives the photoelectric coupler module 11 to disconnect the release, and cuts off the load.

Preferably, the switch 2 comprises a power switch and an alarm reset switch.

Preferably, a battery box is arranged on the back of the shell 1, and a lithium battery is arranged in the battery box; the lithium battery supplies power to the control board through the step-down driving module 10.

Preferably, the display information of the display module 6 includes gas concentration information and abrupt change value detected by the sensor probe 3. The abrupt value refers to a deviation value in which the change in the gas concentration exceeds a certain threshold value, i.e., abrupt change, for a certain period of time.

Preferably, the sensor probe 3 adopts a model number MQ series sensor to detect CO in the combustible gas.

As shown in fig. 4, the buck driving module 10 uses a chip with model LM2576S-5.0 to convert 24V dc signals of the lithium battery into 5V dc signals for driving the sensor acquisition module.

As shown in fig. 3, the dual-voltage comparator module 9 adopts a dual-voltage comparator with model LM393M/TR, the output switch 2 is DOUT, the analog is AOUT, the sensor probe 3 is regulated by regulating the adjustable potentiometer R6, and the adjustable potentiometer R6 is connected with the regulating component. LM393M/TR dual voltage comparator: the voltage comparator with two voltage detection terminals and one output terminal can detect two voltage signals and control the output level.

As shown in fig. 6, the optocoupler module 11 adopts an optocoupler isolator with the model of FOM3063R2 to convert the direct current switch 2 quantity signal of the sensor acquisition module into a signal capable of conducting 220V alternating current, and drives the release to be disconnected. The FODM3063R2 is a triac with optocoupler isolation.

Preferably, the adjusting module I4 and the adjusting module II 5 are unidirectional adjusting structures, the adjusting module I4 is used for adjusting the precision of the sensor probe 3 down, and the adjusting module II 5 is used for adjusting the precision of the sensor probe 3 up.

Although the present utility model has been described in detail by way of preferred embodiments with reference to the accompanying drawings, the present utility model is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present utility model by those skilled in the art without departing from the spirit and scope of the present utility model, and it is intended that all such modifications and substitutions be within the scope of the present utility model/be within the scope of the present utility model as defined by the appended claims. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a novel flammable gas sensor module which characterized in that, includes casing (1), is located sensor probe (3) at casing (1) top, is located the regulation subassembly of casing (1) bottom to and be located the inside control panel of casing (1), wherein:

the shell (1) is arranged in a cube, the front surface of the shell is provided with a display module (6), and a switch (2) is arranged above the display module (6); the side face of the device is provided with a buzzer module (7), and the back face of the device is provided with a hook (8);

the adjusting assembly is divided into an adjusting module I (4) and an adjusting module II (5) which are respectively arranged at two sides of the bottom of the shell (1); the adjusting module I (4) and the adjusting module II (5) are used for adjusting the sensitivity of the sensor probe (3);

the control panel comprises a control module, a step-down driving module (10), a sensor acquisition module, a double-voltage comparator module (9) and a photoelectric coupler module (11), wherein the control module controls the sensor acquisition module to detect the gas concentration through the step-down driving module (10), and the sensor acquisition module is connected with the sensor probe (3); the control module compares the gas concentration through a dual-voltage comparator module (9), and the dual-voltage comparator module (9) is connected with the adjusting component; the control module is connected with the release through a photoelectric coupler module (11).

2. The novel flammable gas sensor module according to claim 1, wherein the sensor probe (3) detects abrupt change of gas concentration for a certain time and feeds back to the control module; the control module compares the threshold value through the double-voltage comparator module (9), exceeds the threshold value, drives the buzzer module (7) to alarm, and drives the photoelectric coupler module (11) to disconnect the release, and cuts off the load.

3. The novel flammable gas sensor module of claim 1, wherein the switch (2) comprises a power switch and an alarm reset switch.

4. The novel combustible gas sensor module of claim 1 wherein the back of the housing (1) is provided with a battery compartment in which a lithium battery is disposed; the lithium battery supplies power to the control panel through the step-down driving module (10).

5. The novel combustible gas sensor module of claim 1 wherein the display information of the display module (6) includes gas concentration information detected by the sensor probe (3), abrupt change values.

6. The novel combustible gas sensor module of claim 1 or 2 wherein the sensor probe (3) employs a model MQ series of sensors to detect CO in the combustible gas.