CN219391885U

CN219391885U - Multi-scene environment self-adaptive gas semiconductor array gas sensing device

Info

Publication number: CN219391885U
Application number: CN202321427272.0U
Authority: CN
Inventors: 姚远舟; 张京阳; 王如志
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2023-06-06
Filing date: 2023-06-06
Publication date: 2023-07-21
Anticipated expiration: 2033-06-06

Abstract

A multi-scene environment self-adaptive gas semiconductor array gas sensing device relates to the technical field of gas component sensing. The traditional gas detection instrument can only detect one or a few gas components, is greatly influenced by environment, and has limited detection precision and sensitivity; meanwhile, the use in unknown emergency situations is extremely limited. A memory alloy sheet and a hollow alloy rod; the device comprises a plurality of memory alloy sheets which are mutually overlapped and coated on the side wall of the hollow alloy rod; each memory alloy sheet is provided with a semiconductor gas sensing array. The memory alloy sheets are mutually overlapped and coated on the side wall of the hollow alloy rod; the device can detect multiple gas components simultaneously, has the advantages of quick response, high stability and the like, and can be suitable for multiple use environments.

Description

Multi-scene environment self-adaptive gas semiconductor array gas sensing device

Technical Field

The utility model relates to the technical field of gas component sensing, in particular to a multi-scene environment self-adaptive gas semiconductor array gas sensing device.

Background

In modern industrial production and daily life, gas detection and monitoring are very important tasks for protecting physical health as well as life safety. The traditional gas detection instrument can only detect one or a few gas components, is greatly influenced by environment, and has limited detection precision and sensitivity; meanwhile, the use in unknown emergency situations is extremely limited. Therefore, it is necessary to develop a gas sensing device capable of detecting multiple gas components simultaneously, with environmental adaptation capability. Currently, researchers have achieved the detection of a variety of gases by using semiconductor materials to make gas sensors. In the prior art, the utility model patent with the publication number of CN212060109U, the utility model patent with the publication number of CN218544049U, the utility model patent with the publication number of CN212060109U, the utility model patent with the publication number of CN218866595U, the utility model with the publication number of SMS gas alarm, the above gas component monitoring sensing device still have the problems of slow response speed, poor stability and the like, and most importantly, all the problems are that the device needs to be installed in advance, the environment adaptability of the device is poor due to the fixed position and a special power supply system, and meanwhile, the device lacks self-deformation capacity to improve the gas sensing surface area, and no related patent or literature report exists at present according to investigation.

Disclosure of Invention

Aiming at the problems, the utility model provides a multi-scene environment self-adaptive gas semiconductor array gas sensing device, which is prepared from a plurality of different semiconductor materials, can detect various gas components at the same time, has the advantages of quick response, high stability and the like, can be suitable for various use environments by adopting a unique structure, and improves the environmental adaptability of the sensing device.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a multi-scene environment self-adaptive gas semiconductor array gas sensing device comprises

A memory alloy sheet and a hollow alloy rod;

the memory alloy sheets are mutually overlapped and coated on the side wall of the hollow alloy rod;

each memory alloy sheet is provided with a semiconductor gas sensing array.

In a preferred embodiment of the present utility model, the upper layer of the memory alloy sheet is provided with an insulating layer;

the semiconductor gas sensing array with the micro-nano structure and the array circuit are arranged on the insulating layer, and a protective layer is arranged on the circuit.

In a preferred embodiment of the utility model, the memory alloy sheets are in a curled state at room temperature and are adhered to the surface of the central cone rod, and the spiral grooves are formed by overlapping the memory alloy sheets.

In a preferred embodiment of the present utility model, the memory alloy sheet is developed into a planar shape under a high temperature condition of 300 ℃ or more by a temperature influence.

In a preferred embodiment of the present utility model, the lower layer of the memory alloy sheet is a heating resistance wire.

In a preferred embodiment of the utility model, the device as a whole presents a conical structure.

In a preferred embodiment of the present utility model, the hollow alloy rod is tapered;

the hollow alloy rod cavity is internally integrated with a power supply unit, a central processing unit and a signal transmitter;

the power supply unit is connected with the central processing unit and the signal transmitter.

In a preferred embodiment of the utility model, the upper layer of the memory alloy sheet is provided with a semiconductor gas sensing array with a micro-nano structure, wherein the semiconductor gas sensing array comprises a micro-nano structure capable of conducting CO and SO ₂ ，NO，NH ₃ ，CH ₄ A semiconductor gas sensing unit of micro-nano structure for detecting harmful gas of human body;

the sensing units for the same gas in the semiconductor gas sensing units are not unique.

In a preferred embodiment of the present utility model, the inner wall of the hollow alloy rod is filled with a heat insulating material.

In a preferred embodiment of the utility model, the top end of the device is provided with a switch button and an indicator lamp.

By adopting the technical scheme, the utility model has the beneficial effects that:

1. the utility model adopts an independent structure, and no external power supply is needed in the use process. Compared with the existing gas sensor, the gas sensor can be used in the ordinary environment and can be used in most burst or emergency situations. The device adopts a conical structure, so that the device can be fixed on the surface of most objects, and the trafficability of the device can be improved when encountering pipelines or cracks which are difficult for human beings to pass through in the use process. The memory alloy surface has the protruding semiconductor gas sensing units, so that the blades are provided with grooves between each other after being overlapped, and the grooves can enable gas to pass through, so that the gas detection capability of the device in an undeployed state is prevented from being influenced. When fire danger happens, such as fire of residential building, the gas sensing device can be delivered to the area to be detected through various throwing modes when the internal situation is unknown; if in forest fire, the device is put in by the helicopter fixed point, can open the heating device of device in advance and make memory alloy expand, reduce the whereabouts speed of device, also can put in directly, make it fix on object surface after whereabouts.

2. After the device is put in place, for example, the environment temperature is lower, the device can be heated by the heating wire at the lower layer of the memory alloy, so that the device is converted into an unfolding state from a curling state, for example, the environment temperature is higher, and the circuit system and the like in the device can ensure the normal operation of the device under the protection of the heat insulation material. The gas sensing array is made of semiconductor materials, and has high detection speed and high temperature resistance. When the device is used, the gas sensing array on the surface of the device is exposed to gas, each semiconductor gas sensing unit transmits detection signals to the central processing unit, the concentration of each gas is obtained through data processing, and then the obtained data can be transmitted to a user terminal through the signal transmitter.

3. The device top be provided with the pilot lamp, harmful gas concentration in the environment exceeds when setting for the threshold value, can send out warning light (red) to can indicate the degree that harmful gas exceeds standard according to the intensity of warning light. The device can be used together in a networking way, a plurality of devices are arranged in the same area, and the total distribution of the gas content in the area can be obtained by summarizing the gas concentration of each area after detection.

Drawings

In order to more clearly describe the technical solutions of the present utility model and the embodiments of the prior art, the drawings that are used will be briefly described below. It should be noted that the figures described below are only some embodiments of the present utility model, and that other figures can be obtained from these figures by one of ordinary skill without inventive effort.

FIG. 1 is a front view of the present utility model in an undeployed state;

FIG. 2 is a top view of the present utility model in an undeployed state;

FIG. 3 is a bottom view of the present utility model in an undeployed state;

FIG. 4 is a front view of the present utility model in an expanded state;

FIG. 5 is a top view of the present utility model in an expanded state;

FIG. 6 is a bottom view of the present utility model in an expanded state;

FIG. 7 is a schematic cross-sectional view of a single memory alloy sheet of the present utility model;

FIG. 8 is a schematic view of the back structure of a single memory alloy sheet of the present utility model;

FIG. 9 is a schematic view of the hollow alloy rod structure of the present utility model.

In the figure 1, a memory alloy sheet; 2. a hollow alloy rod; 3. a switch; 4. an indicator light; 5. a semiconductor gas sensing unit; 6. a gas sensing array; 7. an insulating layer; 8. an array circuit; 9. heating the resistance wire; 10. a protective layer; 11. a cavity; 12. a power supply unit; 13. a central processing unit; 14. a signal transmitter; 15. a heat insulating layer; 16. a groove.

Detailed Description

The technical solutions will be clearly and completely described below by means of the drawings in the embodiments of the present utility model. It should be noted that the described embodiments are only some embodiments of the utility model, but not all embodiments. Other embodiments may be made by those of ordinary skill in the art based on the embodiments of the utility model, which are all within the scope of the utility model without inventive effort.

Referring to fig. 1 to 9, a multi-scenario environment adaptive gas semiconductor array gas sensing device is provided in the first embodiment, and a semiconductor gas sensing unit is used as a core detection component, and a memory alloy is used as a main frame, so as to realize applicability of the device in various environments.

The device comprises a memory alloy sheet 1 and a hollow alloy rod 2, and the whole device is in a conical structure. The top end of the device is provided with a switch button 4 and an indicator light 3. The side of the device is provided with a groove 16 formed by mutually overlapping memory alloy sheets, and the upper layer of the memory alloy sheet is provided with an insulating layer 7 to avoid the loss of current signals. The semiconductor gas sensing array 6 and the array circuit 8 with the micro-nano structure are arranged on the insulating layer, a protective layer 10 is arranged on the circuit, and the protective layer adopts resin or silicon dioxide, so that the anti-interference capability of the device is improved on the basis of protecting the circuit. The gas sensor array 6 is constituted by a semiconductor gas sensor unit 5 of the micrometer scale. The resin may be preferably an epoxy resin.

Further, the upper layer of the memory alloy sheet 1 is provided with a semiconductor gas sensing array with a micro-nano structure, wherein the semiconductor gas sensing array comprises a micro-nano structure capable of sensing CO and SO ₂ ，NO，NH ₃ ，CH ₄ And the micro-nano semiconductor gas sensing unit is used for detecting harmful gases of human bodies. The sensing units for the same gas in the semiconductor gas sensing units are not unique.

Furthermore, the constitution of the gas sensing array can be customized according to the special use environment to change the gas detection range, the length and width dimensions of the semiconductor gas sensing unit are 100-500 mu m, and an insulating layer is arranged between the semiconductor gas sensing unit and the memory alloy sheet. The semiconductor gas sensing unit has small volume and can be attached to the surface of the memory alloy when the memory alloy is curled. The stability of the whole device can be increased to some extent.

The lower layer of the memory alloy sheet is a heating resistance wire 9. The hollow alloy rod 1 is conical. The alloy rod cavity 11 is internally integrated with a power supply unit 12, a central processing unit 13 and a signal transmitter 14. The surface of the alloy rod inner cavity 11 is covered with a heat insulation layer 15, and the power supply unit is connected with the central processing circuit board and the signal transmitter.

Further, the inner wall of the hollow alloy rod 1 is filled with heat insulation materials.

Furthermore, the memory alloy sheet is in a curled state at room temperature and is attached to the surface of the central conical rod to form a spiral groove.

Further, the memory alloy sheet is expanded into a planar shape under a high temperature condition under the influence of temperature.

The above mentioned gas sensor array 6, the power supply unit 12, the central processing unit 13 and the signal transmitter 14 are all well known components, and are electrically connected to form a complete circuit structure, when the switch 3 at the top end of the device is opened, the device enters a working state, at this time, a user can control the device through a terminal and receive data, after putting the device in place, the gas can directly contact the semiconductor gas sensor unit 5 through the groove 16 under the undeployed condition, or be heated through the heating resistance wire 9 at the lower layer of the memory alloy sheet 1, or be directly deployed by using the heat of flame combustion in the environment, so that the semiconductor gas sensor unit 5 on the surface is completely exposed. When the gas sensor array 6 detects that the air contains high-concentration gas harmful to human bodies, the indicator lamp 4 at the top end of the device gives an alarm, meanwhile, signals are transmitted to the central processing circuit, then the central computer analyzes the data and sends instructions, and the real-time monitoring data are transmitted to the terminal through the signal transmitter 14.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims

1. The utility model provides a many scene environment self-adaptation gas semiconductor array gas sensing device which characterized in that: comprises a memory alloy sheet and a hollow alloy rod;

each memory alloy sheet is provided with a semiconductor gas sensing array.

2. A gas sensing device according to claim 1, wherein:

the upper layer of the memory alloy sheet is provided with an insulating layer;

3. A gas sensing device according to claim 1, wherein:

the memory alloy sheet is in a curled state at room temperature and is attached to the surface of the central cone rod to form a spiral groove.

4. A gas sensing device according to claim 1, wherein:

the memory alloy sheet is unfolded into a plane shape under the high temperature condition of more than 300 ℃.

5. A gas sensing device according to claim 1, wherein:

the lower layer of the memory alloy sheet is a snake-shaped heating resistance wire.

6. A gas sensing device according to claim 1, wherein:

the device as a whole presents a conical structure.

7. A gas sensing device according to claim 1, wherein:

the hollow alloy rod is conical;

8. A gas sensing device according to claim 1, wherein:

the upper layer of the memory alloy sheet is provided with a semiconductor gas sensing array with a micro-nano structure, wherein the semiconductor gas sensing array comprises a pair of carbon monoxide (CO) and carbon dioxide (SO) ₂ ，NO，NH ₃ ，CH ₄ A semiconductor gas sensing array unit of a micro-nano structure for detection;

the sensing units aiming at the same gas in the gas sensing array unit are not unique.

9. A gas sensing device according to claim 1, wherein:

the inner wall of the hollow alloy rod is filled with heat insulating material.

10. A gas sensing device according to claim 1, wherein:

the top is a switch button and an indicator light.