CN115824508A - Gas trigger element, preparation method thereof, and gas leak detection device - Google Patents

Abstract

The invention provides a gas trigger element, a preparation method thereof and a gas leakage detection device. The gas trigger element includes an adsorption layer, which is used to adsorb the reducing target gas; a characteristic layer located at the bottom of the adsorption layer; the characteristic layer is an oxidant layer, and the oxidant layer is suitable for forming the original The electrode of the battery; or, the characteristic layer is a metal oxide layer, and the metal oxide layer is used to absorb the reducing target gas in the adsorption layer to increase the conductivity of the metal oxide layer. The gas trigger element provided by the invention can improve the sensitivity of the gas trigger element.

Description

Gas trigger element, preparation method thereof, and gas leak detection device

technical field

The invention relates to the technical field of gas detection, in particular to a gas trigger element, a preparation method thereof, and a gas leakage detection device.

Background technique

Energy depletion and environmental pollution caused by fossil energy consumption are becoming increasingly serious, and large-scale development and utilization of renewable energy is imperative. Although renewable energy reserves are abundant and widely distributed, they fluctuate violently, especially due to periodic changes due to the influence of the natural environment. Hydrogen is an effective energy storage method: during the peak period of renewable energy power generation, electrical energy is converted into chemical energy and stored in hydrogen, and the energy carried by hydrogen is converted into electrical energy through fuel cells for use during the peak period of electricity consumption. Therefore, technologies such as hydrogen preparation, storage, and transportation have attracted the attention of relevant researchers. However, hydrogen is an extremely flammable and explosive gas. When the volume fraction of hydrogen in the air exceeds 4% and is lower than 75%, it can cause combustion or explosion when it encounters a fire source, hot spot or static electricity. Therefore, during the transportation and storage of hydrogen, the leakage of hydrogen and the rapid detection and response after leakage are extremely important.

Existing gas trigger elements have low sensitivity.

Contents of the invention

Therefore, the technical problem to be solved by the present invention is to overcome the defect of low sensitivity of the gas trigger element in the prior art, so as to provide a gas trigger element, its preparation method and a gas leakage detection device.

The present invention provides a gas trigger element, comprising: an adsorption layer, the adsorption layer is used to adsorb the reducing target gas; a characteristic layer located at the bottom of the adsorption layer; the characteristic layer is an oxidant layer, and the oxidant layer is suitable for and the adsorption layer to form the electrode of the original battery; or, the characteristic layer is a metal oxide layer, and the metal oxide layer is used to absorb the reducing target gas in the adsorption layer to improve the conductance of the metal oxide layer Rate.

Optionally, the characteristic layer is an oxidant layer, and the gas trigger element further includes: an electrolyte layer located between the oxidant layer and the adsorption layer, and the electrolyte layer is used for conducting ions.

Optionally, the electrolyte layer is an alkaline gel electrolyte layer.

Optionally, the alkaline gel electrolyte layer includes several gel matrix particles and an alkaline medium between the gel matrix particles.

Optionally, the gel matrix includes a polyacrylic acid matrix, a polyethylene oxide matrix or a polyvinyl alcohol matrix.

Optionally, the alkaline medium includes NaOH or KOH.

Optionally, the thickness of the electrolyte layer is 1 μm-100 μm.

Optionally, the material of the oxidant layer includes Ni(OH) ₂ , NiOOH, Fe(OH) ₂ , hydroxide or double hydroxide of nickel-iron alloy.

Optionally, the thickness of the oxidant layer is 10 μm-100 μm.

Optionally, the metal oxide layer is in contact with the adsorption layer.

Optionally, the material of the metal oxide layer includes tin oxide, manganese monoxide, chromium trioxide, ferrous oxide, iron oxide, copper oxide or zinc oxide.

Optionally, the thickness of the metal oxide layer is 1 μm-10 μm.

Optionally, the material of the adsorption layer includes platinum or palladium.

Optionally, the thickness of the adsorption layer is 10 μm-50 μm.

Optionally, it also includes: a shell wrapping the adsorption layer and the feature layer; there is a vent hole in the shell on the side of the adsorption layer away from the feature layer.

Optionally, the number of the air holes is several.

Optionally, several of the ventilation holes are evenly distributed.

Optionally, several vent holes are arranged in an array.

Optionally, the air holes have a diameter of 0.5 μm-1 μm, and the distance between adjacent air holes is 0.5 μm-1 μm.

The invention provides a method for preparing a gas trigger element, comprising: forming a characteristic layer; forming an adsorption layer on the characteristic layer; the characteristic layer is an oxidant layer, and the oxidant layer is suitable for forming a primary battery with the adsorption layer electrode; or, the characteristic layer is a metal oxide layer, and the metal oxide layer is used to absorb the reducing target gas in the adsorption layer to increase the conductivity of the metal oxide layer.

Optionally, the process for forming the characteristic layer includes a physical vapor deposition process or a chemical vapor deposition process; the process for forming the adsorption layer includes a physical vapor deposition process or a chemical vapor deposition process.

Optionally, the process for forming the characteristic layer and the adsorption layer is a magnetron sputtering process or a plasma sputtering process.

Optionally, the characteristic layer is an oxidant layer; the preparation method of the gas trigger element further includes: before forming the adsorption layer, forming an electrolyte layer on the characteristic layer, and the electrolyte layer is used to conduct ions; forming the After the adsorption layer, the electrolyte layer is located between the oxidant layer and the adsorption layer.

Optionally, the process for forming the electrolyte layer includes a solution casting process, a free radical aqueous solution polymerization process or a phase inversion process.

The present invention provides a gas leakage detection device, comprising: a gas trigger module, the gas trigger module includes the gas trigger element of the present invention, and the gas trigger module is suitable for outputting a trigger signal.

Optionally, it also includes: a battery; a sensor; a wireless communication module, the wireless communication module is electrically connected to the sensor; a controller, the controller is adapted to control the battery to the sensor and the sensor according to the trigger signal The wireless communication module applies the power signal or disconnects the power signal.

Optionally, it also includes: a switch circuit, the switch circuit is electrically connected to the output terminal of the gas trigger module, and the switch circuit is also electrically connected to the input terminal of the controller and the battery; the switch circuit The circuit is adapted to control the connection or disconnection between the battery and the controller according to the trigger signal; both the sensor and the wireless communication module are electrically connected to the controller.

Optionally, the switch circuit includes a MOS transistor, the gate of the MOS transistor is connected to the output terminal of the gas trigger module, the source of the MOS transistor is connected to the battery, and the drain of the MOS transistor is Pole is connected to the controller.

Optionally, the output end of the gas trigger module is electrically connected to the controller, and the controller is electrically connected to the battery; the controller is adapted to control the sensor and the controller according to the trigger signal The conduction and disconnection between, and the conduction and disconnection between the wireless communication module and the controller.

Optionally, the sensors include gas concentration sensors and/or temperature and humidity sensors.

Optionally, the gas trigger module includes a signal processing unit, the signal processing unit is connected to the electrode of the primary battery; or, the signal processing unit is connected to the metal oxide layer; the signal processing unit Used to output the trigger signal.

Optionally, the gas trigger module, the battery, the controller, the sensor and the wireless communication module are integrated in the same circuit board.

The beneficial effects of the present invention are:

In a gas trigger element provided by the present invention, when the characteristic layer is an oxidant layer, the oxidant layer is suitable for forming an electrode of a primary battery with the adsorption layer, and since the adsorption layer is used for adsorbing a reducing target gas, the The oxidant layer serves as the anode of the primary battery, the adsorption layer absorbs the reducing target gas in the environment and serves as the cathode of the primary battery, and the anode and cathode of the primary battery undergo electron transfer in an external circuit, and A reduction reaction occurs at the anode of the original battery, an oxidation reaction occurs at the cathode of the original battery, and a potential difference is generated between the anode and the cathode of the original battery, which is used as a basis for generating a trigger signal; or, when the characteristic layer is a metal oxide layer, the The metal oxide layer absorbs the reducing target gas in the adsorption layer to increase the conductivity of the metal oxide layer, so that the resistance of the metal oxide layer decreases, and the resistance change of the metal oxide layer is used as a basis for generating a trigger signal . Using the above-mentioned gas trigger element can improve the sensitivity of the gas trigger element.

The gas trigger element provided by the present invention is applied to the gas leakage detection device provided by the present invention, which includes a gas trigger module, and the gas trigger module includes the gas trigger element of the present invention. The detection sensitivity of the gas leak detection device is improved.

Further, the gas trigger module is adapted to output a trigger signal; a battery; a sensor; a wireless communication module, the wireless communication module is electrically connected to the sensor; a controller, the controller is adapted to control the trigger signal according to the trigger signal The battery applies a power signal to the sensor and the wireless communication module or disconnects the power signal. When there is a reduction target gas leakage in the environment, the controller controls the battery to apply a power signal to the sensor and the wireless communication module according to the trigger signal output by the gas trigger module, and then the sensor restores the gas in the environment. The concentration or temperature and humidity of the target gas is collected and fed back, and the alarm signal is sent out through the wireless communication module. If there is no reducing target gas leakage in the environment, the gas trigger module has no trigger signal output, and no power signal is applied to the sensor and wireless communication module, which can reduce the start-up time of the sensor and wireless communication module and minimize the gas Power loss in leak detection devices.

Further, the gas trigger module, the battery, the controller, the sensor and the wireless communication module are integrated in the same circuit board. Such an arrangement does not require additional electrical signal wire harness encapsulation and additional maintenance for slaves, which can reduce the maintenance cost of the gas leakage detection device.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Fig. 1 is a kind of structural representation of the gas trigger element in the embodiment 1 of the present invention;

Fig. 2 is another schematic structural view of the gas trigger element in Embodiment 1 of the present invention;

Fig. 3 is the flowchart of the preparation method of the gas trigger element in embodiment 2 of the present invention;

FIG. 4 is a schematic diagram of a gas leakage detection device in Embodiment 3 of the present invention;

Fig. 5 is another schematic diagram of the gas leakage detection device in Embodiment 3 of the present invention;

6 is a schematic diagram of a connection relationship of the gas trigger module in Embodiment 3 of the present invention;

7 is a schematic diagram of another connection relationship of the gas trigger module in Embodiment 3 of the present invention;

Explanation of reference signs:

1-housing; 2-ventilation hole; 3-adsorption layer; 4-electrolyte layer; 5-oxidant layer; 6-metal oxide layer; 100-inverting amplifier; 200-voltage follower; R1-first resistance; R0- The second resistance; Rf-the third resistance; R-the fourth resistance.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

Example 1

This embodiment provides a gas trigger element, referring to Fig. 1 and Fig. 2 together, including: an adsorption layer 3, which is used to adsorb reducing target gas; a characteristic layer located at the bottom of the adsorption layer 3; the The characteristic layer is an oxidant layer 5 (refer to FIG. 1), and the oxidant layer 5 is suitable for forming an electrode of a primary battery with the adsorption layer 3; or, the characteristic layer is a metal oxide layer 6 (refer to FIG. 2), so The metal oxide layer 6 is used to absorb the reducing target gas in the adsorption layer 3 to increase the conductivity of the metal oxide layer 6 .

In this embodiment, when the characteristic layer is an oxidant layer 5, the oxidant layer 5 is suitable to form an electrode of a primary battery with the adsorption layer 3, since the adsorption layer 3 is used to adsorb the reducing target gas, so that The oxidant layer 5 serves as the anode of the primary battery, and the adsorption layer 3 acts as the cathode of the primary battery after absorbing the reducing target gas in the environment, and the anode and the negative electrode of the primary battery undergo electron transfer in an external circuit, In addition, a reduction reaction occurs at the anode of the primary cell, an oxidation reaction occurs at the cathode of the primary cell, and a potential difference is generated between the anode and the cathode of the primary cell, thereby serving as a basis for generating a trigger signal. Alternatively, when the characteristic layer is a metal oxide layer 6, the metal oxide layer 6 absorbs the reducing target gas in the adsorption layer 3 to increase the conductivity of the metal oxide layer 6, so that the metal oxide layer 6 The resistance of the metal oxide layer 6 decreases, and the resistance change of the metal oxide layer 6 is used as a basis for generating a trigger signal. Using the above-mentioned gas trigger element can improve the sensitivity of the gas trigger element.

Further, when the characteristic layer is the oxidant layer 5, continue to refer to FIG. 1, the gas trigger element also includes: an electrolyte layer 4, located between the oxidant layer 5 and the adsorption layer 3, the electrolyte layer 4 for conducting ions. The electrolyte layer 4 transports cations to the anode of the primary battery, and transports anions to the cathode of the primary battery, so that the primary battery undergoes redox reactions to form a potential difference.

In one embodiment, the electrolyte layer 4 is an alkaline gel electrolyte layer.

In one embodiment, the alkaline gel electrolyte layer includes several gel matrix particles and an alkaline medium between the gel matrix particles. The gel matrix includes polyacrylic acid matrix, polyethylene oxide matrix or polyvinyl alcohol matrix; the alkaline medium includes NaOH or KOH.

In one embodiment, the thickness of the electrolyte layer 4 is 1 μm-100 μm, such as 20 μm, 40 μm, 60 μm or 100 μm. If the thickness of the electrolyte layer 4 is too large, the internal resistance of the galvanic cell is relatively large, and when the reducing target gas is sufficient, the trigger signal will be generated, which will have a weak effect on improving the sensitivity of the gas trigger element; if the If the thickness of the electrolyte layer 4 is too small, the internal resistance of the original battery is relatively small, and only a little reducing target gas is absorbed by the adsorption layer 3, which will cause the gas trigger element to generate a trigger signal, but in actual use, the gas Too high a sensitivity of the trigger element does little to reduce power loss.

In one embodiment, the material of the oxidant layer 5 includes Ni(OH) ₂ , NiOOH, Fe(OH) ₂ , hydroxide or double hydroxide of nickel-iron alloy. In other embodiments, the material of the oxidizer layer includes other metal hydroxide materials.

In this implementation, the material of the oxidant layer 5 is preferably nickel hydroxide. Due to the high electrochemical activity of nickel hydroxide, it is beneficial to act as an anode in primary batteries.

In one embodiment, the thickness of the oxidant layer 5 is 10 μm-100 μm, such as 10 μm, 40 μm, 60 μm, 80 μm or 100 μm. If the thickness of the oxidant layer 5 is too large, it is easy to cause waste; if the thickness of the oxidant layer 5 is too small, the service life of the primary battery will become shorter, and when the oxidant layer 5 is exhausted, the gas trigger element will generate a trigger signal. Chances are reduced.

Continuing to refer to FIG. 2 , the metal oxide layer 6 is in contact with the adsorption layer 3 .

In one embodiment, the material of the metal oxide layer 6 includes tin oxide, manganese monoxide, chromium oxide, ferrous oxide, iron oxide, copper oxide or zinc oxide. In other embodiments, the material of the metal oxide layer includes other metal oxide materials.

In this implementation, the material of the metal oxide layer 6 is preferably tin oxide. The metal oxide layer 6 formed of tin oxide material has better sensitivity.

In one embodiment, the metal oxide layer 6 has a thickness of 1 μm-10 μm, such as 1 μm, 4 μm, 6 μm, 8 μm or 10 μm. In this way, the probability of full contact between the reducing target gas and the metal oxide layer 6 is increased, the electrical conductivity of the metal oxide layer 6 is improved, thereby reducing the resistance of the metal oxide layer 6, and when the target gas exists in the environment, the gas trigger element is improved. sensitivity.

In one embodiment, the material of the adsorption layer 3 includes platinum or palladium. Since the adsorption layer 3 is used to specifically adsorb the reducing target gas, for example, in this embodiment, the reducing target gas is hydrogen, and platinum or palladium has specificity to hydrogen, so that hydrogen is adsorbed on the adsorption layer. 3 on.

In other embodiments, the material of the adsorption layer includes other noble metal materials. The other noble metal material utilizes its specificity to adsorb other reducing gases.

In one embodiment, the thickness of the adsorption layer 3 is 10 μm-50 μm, such as 10 μm, 20 μm, 30 μm, 40 μm or 50 μm. If the thickness of the adsorption layer 3 is too large, because the material of the adsorption layer 3 is a noble metal material, the cost of process production will be increased; if the thickness of the adsorption layer 3 is too small, the adsorption of the reducing target gas is relatively weak Difference.

In one embodiment, the gas triggering element further includes: a housing 1 wrapping the adsorption layer 3 and the feature layer; the housing 1 on the side of the adsorption layer 3 away from the feature layer has a vent hole 2 . The shell 1 wraps the adsorption layer 3 and the characteristic layer, and can protect the adsorption layer 3 and the characteristic layer from external pollution; the shell 1 on the side of the adsorption layer 3 away from the characteristic layer A ventilation hole 2 is arranged in the middle, and the reducing target gas is adsorbed on the adsorption layer 3 after entering the ventilation hole.

In one embodiment, the number of the vent holes 2 is several; the several vent holes 2 are uniformly distributed; the several vent holes 2 are arranged in an array. The reducing target gas is evenly adsorbed on the adsorption layer 3 .

In one embodiment, the distance between adjacent air holes 2 is 0.5 μm-1 μm, for example, 0.5 μm or 1 μm.

In one embodiment, the vent holes 2 have a diameter of 0.5 μm-1 μm, for example, 0.5 μm or 1 μm. If the aperture of the vent hole 2 is too large, it is impossible to block the mixing of other particulate matter impurities in the environment, and the effect of improving the sensitivity of the gas trigger element is poor; if the aperture of the vent hole 2 is too small, the rate of reducing gas entering the vent hole will be reduced. drop.

Example 2

This embodiment provides a method for preparing a gas trigger element, referring to FIG. 3 , including:

S1: Form a feature layer;

S2: forming an adsorption layer on the feature layer.

The process of forming the feature layer includes physical vapor deposition process or chemical vapor deposition process; the process of forming the adsorption layer includes physical vapor deposition process or chemical vapor deposition process.

In one embodiment, the process for forming the feature layer and the adsorption layer is a magnetron sputtering process or a plasma sputtering process.

In other embodiments, the process for forming the feature layer is other physical vapor deposition process, and the process for forming the adsorption layer is other chemical vapor deposition process.

In one embodiment, the characteristic layer is an oxidant layer, and the oxidant layer is suitable for forming an electrode of a primary battery with the adsorption layer. The preparation method of the gas trigger element further includes: before forming the adsorption layer, forming an electrolyte layer on the characteristic layer, and the electrolyte layer is used to conduct ions; after forming the adsorption layer, the electrolyte layer is located on the between the oxidant layer and the adsorption layer.

The process for forming the oxidant layer includes a physical vapor deposition process or a chemical vapor deposition process.

In this embodiment, the magnetron sputtering process or plasma sputtering process is preferred for forming the oxidant layer. In other embodiments, the process for forming the oxidant layer is other physical vapor deposition process or other chemical vapor deposition process.

The process for forming the electrolyte layer includes a solution casting process, a free radical aqueous solution polymerization process or a phase inversion process.

In another embodiment, the feature layer is a metal oxide layer, and the metal oxide layer is used to absorb the reducing target gas in the adsorption layer to increase the conductivity of the metal oxide layer.

The process for forming the metal oxide layer includes a physical vapor deposition process or a chemical vapor deposition process.

In this embodiment, the process of forming the metal oxide layer is preferably a magnetron sputtering process or a plasma sputtering process. In other embodiments, the process for forming the metal oxide layer is other physical vapor deposition process or other chemical vapor deposition process.

Example 3

This embodiment provides a gas leakage detection device, referring to FIG. 4 or FIG. 5 , including: a gas trigger module, the gas trigger module includes the gas trigger element described in Embodiment 1, and the gas trigger module is suitable for to output the trigger signal. The detection sensitivity of the gas leakage detection device is improved.

The gas leakage detection device further includes: a battery; a sensor; a wireless communication module, the wireless communication module is electrically connected to the sensor; a controller, the controller is adapted to control the battery to the The sensor and the wireless communication module apply the power signal or disconnect the power signal.

The gas trigger element provided in Embodiment 1 of the present invention is applied to the gas leakage detection device provided by the present invention. When there is a reducing target gas leakage in the environment, the controller controls the gas trigger module according to the trigger signal output by the gas trigger module The battery applies a power signal to the sensor and the wireless communication module, and then collects and feeds back the concentration or temperature and humidity of the reducing target gas in the environment through the sensor, and sends out an alarm signal through the wireless communication module. If there is no reducing target gas leakage in the environment, the gas trigger module has no trigger signal output, and no power signal is applied to the sensor and wireless communication module, which can reduce the start-up time of the sensor and wireless communication module and minimize the gas Power loss in leak detection devices.

In one embodiment, the gas trigger module, the battery, the controller, the sensor and the wireless communication module are integrated in the same circuit board. Such an arrangement does not require additional electrical signal wire harness encapsulation and additional maintenance for slaves, which can reduce the maintenance cost of the gas leakage detection device.

Referring to FIG. 4 , the output end of the gas trigger module is electrically connected to the switch circuit. When there is a reduction target gas leakage in the environment, the gas trigger module outputs a trigger signal, and the trigger signal wakes up the switch circuit to work. The other end of the switch circuit is electrically connected to the input terminal of the controller and the battery, and the switch circuit controls the conduction between the battery and the controller, because the sensor and the wireless communication module Both are electrically connected to the controller, and the sensor collects and feeds back the concentration or temperature and humidity of the reducing target gas, and then sends an alarm signal through the wireless communication module; if there is no leakage of the reducing target gas in the environment, The gas trigger module does not output a trigger signal, and the switch circuit does not need to work, which can reduce the start-up time of the gas leakage detection device and minimize the power loss of the gas leakage detection device. .

Referring to FIG. 5 , the output end of the gas trigger module is electrically connected to the controller. When there is a reducing target gas leakage in the environment, the gas trigger module outputs a trigger signal. Since one end of the controller is connected to The battery is connected, and the trigger signal can directly wake up the controller to work. The other end of the controller is connected to the sensor and the wireless communication module. The sensor collects and feeds back the concentration or temperature and humidity of the reducing target gas, and then the The alarm signal is sent out through the wireless communication module. If there is no reducing target gas leakage in the environment, the gas trigger module will not output a trigger signal, and the controller does not need to work, which can reduce the start-up time of the gas leakage detection device and minimize the operating time of the gas leakage detection device. Power loss.

In one embodiment, referring to FIG. 4 , the gas leakage detection device further includes: a switch circuit, the switch circuit is electrically connected to the output terminal of the gas trigger module, and the switch circuit is also connected to the input terminal of the controller terminal is electrically connected to the battery; the switch circuit is adapted to control the conduction or disconnection between the battery and the controller according to the trigger signal; the sensor and the wireless communication module are both connected to the The controller is electrically connected.

In one embodiment, the switch circuit includes a MOS transistor, the gate of the MOS transistor is connected to the output terminal of the gas trigger module, the source of the MOS transistor is connected to the battery, and the MOS transistor The drain and the controller are connected.

In another embodiment, referring to FIG. 5, the output end of the gas trigger module is electrically connected to the controller, and the controller is electrically connected to the battery; the controller is adapted to Control the connection and disconnection between the sensor and the controller, and the connection and disconnection between the wireless communication module and the controller.

In one embodiment, the gas trigger module includes a signal processing unit, and the signal processing unit is connected to the electrodes of the primary battery; or, the signal processing unit is connected to the metal oxide layer. The signal processing unit is used to output the trigger signal.

When the characteristic layer in the gas trigger element is an oxidant layer, referring to FIG. 6 , the signal processing unit includes a non-inverting amplifier 100, a first resistor R1, a second resistor R0 and a third resistor Rf, and one end of the first resistor R1 is connected to the non-inverting amplifier. The positive input terminal of the amplifier 100 is connected to the oxidant layer of the primary battery, the other end of the first resistor R1, the adsorption layer of the primary battery, and one end of the second resistor R0 are connected and grounded; the other end of the second resistor R0, One end of the third resistor Rf is connected to the negative input terminal of the non-inverting amplifier 100, the other end of the third resistor Rf is connected to the output terminal of the non-inverting amplifier 100, and the output terminal of the non-inverting amplifier 100 is used as the output terminal of the gas trigger module .

When the characteristic layer in the gas trigger element is a metal oxide layer, referring to FIG. 7 , the signal processing unit includes a voltage follower 200 and a fourth resistor R, and the metal oxide layer has a first side wall and a second side wall arranged oppositely. The side wall, the first side wall is connected to the power supply, the second side wall is connected to one end of the fourth resistor R and the positive input end of the voltage follower 200, the other end of the fourth resistor R is grounded, and the voltage The negative input terminal of the follower 200 is connected to the output terminal of the voltage follower 200, and the output terminal of the voltage follower 200 is used as the output terminal of the gas trigger module.

In one embodiment, the sensor includes a gas concentration sensor and/or a temperature and humidity sensor. The gas concentration sensor is suitable for collecting and processing the concentration of the reducing target gas; the temperature and humidity sensor is suitable for collecting and processing the temperature and humidity of the reducing target gas.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (18)

1. A gas trigger element, comprising:

an adsorption layer for adsorbing a target gas for reducibility;

the characteristic layer is positioned at the bottom of the adsorption layer;

the characteristic layer is an oxidant layer which is suitable for forming an electrode of a galvanic cell together with the adsorption layer; or the characteristic layer is a metal oxide layer, and the metal oxide layer is used for absorbing the reductive target gas in the adsorption layer to improve the conductivity of the metal oxide layer.

2. The gas trigger element according to claim 1, wherein the characteristic layer is an oxidant layer, the gas trigger element further comprising: an electrolyte layer between the oxidant layer and the sorbent layer, the electrolyte layer for conducting ions;

preferably, the electrolyte layer is an alkaline gel electrolyte layer;

preferably, the alkaline gel electrolyte layer comprises a plurality of gel matrix particles and an alkaline medium located between the gel matrix particles;

preferably, the gel matrix comprises a polyacrylic acid matrix, a polyethylene oxide matrix or a polyvinyl alcohol matrix;

preferably, the alkaline medium comprises NaOH or KOH;

preferably, the thickness of the electrolyte layer is 1 μm to 100 μm.

3. Gas trigger element according to claim 1, characterized in that the material of the oxidant layer comprises Ni (OH) ₂ 、NiOOH、Fe(OH) ₂ A hydroxide or double hydroxide of a nickel-iron alloy.

4. The gas trigger element according to claim 1, characterized in that the thickness of the oxidant layer is 10-100 μ ι η.

5. The gas trigger element according to claim 1, characterized in that the metal oxide layer is in contact with the sorption layer;

preferably, the material of the metal oxide layer comprises tin oxide, manganese monoxide, chromium oxide, ferrous oxide, ferric oxide, copper oxide or zinc oxide;

preferably, the thickness of the metal oxide layer is 1 μm to 10 μm.

6. A gas trigger element according to claim 1, characterized in that the material of the adsorption layer comprises platinum or palladium.

7. The gas trigger element according to claim 1, wherein the thickness of the adsorption layer is 10 μm to 50 μm.

8. A gas trigger element according to any of claims 1 to 7, further comprising: a shell wrapping the adsorption layer and the characteristic layer; the shell positioned on the side, facing away from the characteristic layer, of the adsorption layer is provided with a vent hole;

preferably, the number of the vent holes is several;

preferably, a plurality of the vent holes are uniformly distributed;

preferably, a plurality of the vent holes are arranged in an array;

preferably, the pore diameter of the vent hole is 0.5-1 μm, and the distance between adjacent vent holes is 0.5-1 μm.

9. A method of making a gas trigger component, comprising:

forming a characteristic layer;

forming an adsorption layer on the feature layer;

the characteristic layer is an oxidant layer which is suitable for forming an electrode of a galvanic cell together with the adsorption layer; or the characteristic layer is a metal oxide layer, and the metal oxide layer is used for absorbing the reductive target gas in the adsorption layer to improve the conductivity of the metal oxide layer.

10. The method of claim 9, wherein the process of forming the feature layer comprises a physical vapor deposition process or a chemical vapor deposition process; the process for forming the adsorption layer comprises a physical vapor deposition process or a chemical vapor deposition process;

preferably, the process for forming the feature layer and the adsorption layer is a magnetron sputtering process or a plasma sputtering process.

11. The method of manufacturing a gas trigger element according to claim 10, wherein the characteristic layer is an oxidant layer; the preparation method of the gas trigger component further comprises the following steps: forming an electrolyte layer on the feature layer before forming the adsorption layer, the electrolyte layer for conducting ions; after the formation of the adsorption layer, the electrolyte layer is located between the oxidant layer and the adsorption layer;

preferably, the process of forming the electrolyte layer includes a solution casting process, a radical aqueous solution polymerization process, or a phase inversion process.

12. A gas leak detection apparatus, comprising:

a gas trigger module comprising a gas trigger element according to any one of claims 1 to 8, the gas trigger module being adapted to output a trigger signal.

13. The gas leak detection apparatus according to claim 12, further comprising:

a battery;

a sensor;

the wireless communication module is electrically connected with the sensor;

the controller is suitable for controlling the battery to apply a power supply signal or disconnect the power supply signal to the sensor and the wireless communication module according to the trigger signal.

14. The gas leak detection apparatus according to claim 13, further comprising: the switch circuit is electrically connected with the output end of the gas trigger module, and is also electrically connected with the input end of the controller and the battery; the switch circuit is suitable for controlling the connection or disconnection between the battery and the controller according to the trigger signal; the sensor and the wireless communication module are electrically connected with the controller;

preferably, the switch circuit comprises an MOS transistor, a gate of the MOS transistor is connected to the output end of the gas trigger module, a source of the MOS transistor is connected to the battery, and a drain of the MOS transistor is connected to the controller.

15. The gas leak detection apparatus of claim 13, wherein an output of the gas trigger module is electrically connected to the controller, and the controller is electrically connected to the battery; the controller is suitable for controlling the connection and disconnection between the sensor and the controller and the connection and disconnection between the wireless communication module and the controller according to the trigger signal.

16. A gas leak detection apparatus according to claim 13, wherein the sensor comprises a gas concentration sensor and/or a temperature and humidity sensor.

17. The gas leak detection device of claim 12, wherein the gas trigger module comprises a signal processing unit connected to an electrode of the galvanic cell; or, the signal processing unit is connected with the metal oxide layer;

the signal processing unit is used for outputting the trigger signal.

18. The gas leak detection device of claim 13, wherein the gas trigger module, the battery, the controller, the sensor, and the wireless communication module are integrated in a same circuit board.

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