阅读说明：本技术 一种数字气压传感器 (Digital air pressure sensor ) 是由 艾育林 于 2020-11-18 设计创作，主要内容包括：本发明公开了一种数字气压传感器,包括外壳和设置在外壳上的数字显示屏；所述外壳内设有传感器本体,所述传感器本体包括端钮、安装件、缓冲组件、敏感元件总成和连接头；所述连接头上设有轴向的通气管一,所述通气管一内设有气压感应组件,所述气压感应组件包括凹形形变膜和保持架,所述凹形形变膜设置在保持架上,所述凹形形变膜内设有电阻应变片；所述通气管一的上端设有进气管；所述安装件内设有活动腔,所述敏感元件总成可活动设置在所述活动腔内,所述活动腔内位于敏感元件总成的上端设有环形卡板。本发明能够在气压较大时对敏感元件总成缓冲,当气压超过测量范围时,能够将进气管堵住,从而防止传感器损坏。(The invention discloses a digital air pressure sensor, which comprises a shell and a digital display screen arranged on the shell; a sensor body is arranged in the shell and comprises an end button, a mounting part, a buffer component, a sensitive element assembly and a connector; the connector is provided with an axial vent pipe I, an air pressure sensing assembly is arranged in the vent pipe I, the air pressure sensing assembly comprises a concave deformation film and a retainer, the concave deformation film is arranged on the retainer, and a resistance strain gauge is arranged in the concave deformation film; an air inlet pipe is arranged at the upper end of the first vent pipe; a movable cavity is arranged in the mounting part, the sensitive element assembly can be movably arranged in the movable cavity, and an annular clamping plate is arranged at the upper end of the sensitive element assembly in the movable cavity. The invention can buffer the sensitive element assembly when the air pressure is larger, and can block the air inlet pipe when the air pressure exceeds the measurement range, thereby preventing the sensor from being damaged.)

1. A digital air pressure sensor comprises a shell (1) and a digital display screen (2) arranged on the shell (1); the method is characterized in that: a sensor body is arranged in the shell (1), and the sensor body comprises an end button (3), a mounting piece (6), a buffer assembly, a sensitive element assembly (11) and a connector (7); the terminal button (3) is rotatably arranged at the upper end of the mounting part (6), the connector (7) is arranged at the lower end of the mounting part (6), and the sensitive element assembly (11) is connected with the digital display screen (2);

an axial vent pipe I (8) is arranged on the connector (7), an air pressure sensing assembly is arranged in the vent pipe I (8), the air pressure sensing assembly comprises a concave deformation film (13) and a retainer (24), the concave deformation film (13) is arranged on the retainer (24), a resistance strain gauge is arranged in the concave deformation film (13), and the resistance value of the resistance strain gauge can change when the resistance strain gauge is deformed; an air inlet pipe (14) is arranged at the upper end of the first vent pipe (8);

a movable cavity (9) is arranged in the mounting part (6), the sensitive element assembly (11) is movably arranged in the movable cavity (9), an annular clamping plate (5) is arranged at the upper end of the sensitive element assembly (11) in the movable cavity (9), and the sensitive element assembly (11) is connected with the end button (3) through a wire (4);

the buffer assembly comprises a buffer air bag (12), a vent pipe II (15) and an air passage on-off control assembly, and the buffer air bag (12) is arranged in the movable cavity (9) and is positioned at the upper end of the sensitive element assembly (11); one end of the vent pipe II (15) is communicated with the air inlet pipe (14), and the other end of the vent pipe II is communicated with the buffering air bag (12); the air inlet pipe (14) is also provided with an air path on-off control assembly for controlling the on-off of the air inlet pipe (14); gas circuit on-off control subassembly is including holding chamber (17), electro-magnet (19), iron plate (23), connecting rod (22), reset spring (21) and ventilating piston (20), it sets up to hold chamber (17) on breather pipe two (15) and both sides communicate with each other with breather pipe two (15), ventilating piston (20) activity sets up hold in chamber (17), it ventilates chamber (16) to be equipped with in piston (20) to ventilate, the both sides of ventilating chamber (16) are equipped with air vent (18), connecting rod (22) one end with ventilating piston (20) are connected, and the other end runs through hold chamber (17) with iron plate (23) are connected, can produce magnetic attraction after electro-magnet (19) circular telegram iron plate (23).

2. The digital air pressure sensor according to claim 1, wherein: and an annular sealing ring (10) is arranged on the circumferential surface of the sensitive element assembly (11).

3. The digital air pressure sensor according to claim 1, wherein: the vent hole (18) on the vent piston (20) is communicated with the vent pipe II (15) after the iron block (23) and the electromagnet (19) are attracted.

4. A digital air pressure sensor according to claim 3, wherein: the aperture of the vent hole (18) is consistent with the aperture of the vent pipe II (15).

Technical Field

The invention relates to the technical field of sensors, in particular to a digital air pressure sensor.

Background

The air pressure sensor is widely applied as a traditional device for monitoring the air pressure, the air pressure monitored by the air pressure sensor is large or small, when large air pressure enters the sensor, large instantaneous impact can be caused to a sensitive element assembly in the sensor, and the sensitive element assembly can be damaged in the past; also, there is a range of air pressure measurements by the sensor that can directly damage the sensor when the air pressure entering the sensor exceeds the range.

Disclosure of Invention

The invention aims to solve the problems that: the utility model provides a digital baroceptor, can cushion the sensing element assembly when atmospheric pressure is great, when atmospheric pressure exceedes measuring range, can block up the intake pipe to prevent that the sensor from damaging.

The technical scheme provided by the invention for solving the problems is as follows: a digital air pressure sensor comprises a shell and a digital display screen arranged on the shell; a sensor body is arranged in the shell and comprises an end button, a mounting part, a buffer component, a sensitive element assembly and a connector; the terminal button is rotatably arranged at the upper end of the mounting piece, and the connector is arranged at the lower end of the mounting piece;

the connector is provided with an axial vent pipe I, an air pressure sensing assembly is arranged in the vent pipe I, the air pressure sensing assembly comprises a concave deformation film and a retainer, the concave deformation film is arranged on the retainer, a resistance strain gauge is arranged in the concave deformation film, and the resistance value of the resistance strain gauge can change when the resistance strain gauge deforms; an air inlet pipe is arranged at the upper end of the first vent pipe;

a movable cavity is arranged in the mounting part, the sensitive element assembly can be movably arranged in the movable cavity, an annular clamping plate is arranged at the upper end of the sensitive element assembly in the movable cavity, and the sensitive element assembly is connected with the terminal button through a lead;

the buffer assembly comprises a buffer air bag, a vent pipe II and an air passage on-off control assembly, and the buffer air bag is arranged in the movable cavity and positioned at the upper end of the sensitive element assembly; one end of the vent pipe II is communicated with the air inlet pipe, and the other end of the vent pipe II is communicated with the buffering air bag; the air inlet pipe is also provided with an air path on-off control assembly for controlling the through end of the air inlet pipe; the air circuit on-off control assembly comprises a containing cavity, an electromagnet, an iron block, a connecting rod, a return spring and a ventilation piston, the containing cavity is arranged on the ventilation pipe II, two sides of the containing cavity are communicated with the ventilation pipe II, the ventilation piston is movably arranged in the containing cavity, a ventilation cavity is arranged in the ventilation piston, air holes are formed in two sides of the ventilation cavity, one end of the connecting rod is connected with the ventilation piston, the other end of the connecting rod penetrates through the containing cavity to be connected with the iron block, and the electromagnet can generate magnetic force to attract the iron block after being electrified.

Preferably, an annular sealing ring is arranged on the circumferential surface of the sensing element assembly.

Preferably, the vent hole on the vent piston is communicated with the vent pipe II after the iron block is attracted with the electromagnet.

Preferably, the aperture of the vent hole is consistent with the aperture of the vent pipe II.

Compared with the prior art, the invention has the advantages that:

1. by arranging the buffer component, when the air pressure entering the first vent pipe is larger, the concave deformation film in the first vent pipe deforms under the action of the air pressure, the resistance strain gauge in the concave deformation film deforms, the resistance value changes, when the resistance value changes to a set interval, the control panel connected with the resistance strain gauge controls the two electromagnets to be electrified, the electromagnets generate suction force to be attracted with the iron block, the vent pipe I is communicated, the air inlet pipe is closed, air enters the buffering air bag through the vent pipe I, the buffering air bag is inflated and then swells, the gas pressure detection device has the advantages that the sensitive element assembly is buffered by using the gas to be detected per se, and an additional gas source is not needed; meanwhile, the air bag buffer and the sensitive element assembly are in flexible contact, so that the buffer effect is better;

2. when the atmospheric pressure that gets into breather pipe one surpassed the atmospheric pressure that this sensor can bear, the concave deformation membrane in the breather pipe one produces great deformation under the effect of atmospheric pressure, resistance foil gage in the concave deformation membrane produces great deformation, the resistance changes, after the resistance changes another settlement interval, the electro-magnet circular telegram of setting on the intake pipe limit is controlled to the control panel that is connected with the resistance foil gage, the electro-magnet produces suction and iron plate actuation, the intake pipe is stopped up, prevent to lead to the inside components and parts of installed part impaired because of atmospheric pressure is too big.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of a sensor body of the present invention;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

the attached drawings are marked as follows: 1. the air-permeable safety valve comprises a shell, 2, a digital display screen, 3, a terminal button, 4, a wire, 5, an annular clamping plate, 6, an installation part, 7, a connector, 8, a first air pipe, 9, a movable cavity, 10, an annular sealing ring, 11, a sensitive element assembly, 12, a buffer air bag, 13, a concave deformation membrane, 14, an air inlet pipe, 15, a second air pipe, 16, an air vent cavity, 17, a containing cavity, 18, an air vent, 19, an electromagnet, 20, an air vent piston, 21, a reset spring, 22, a connecting rod, 23, an iron block, 24 and a retainer.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.

Detailed description of the inventionas shown in fig. 1-3, a digital air pressure sensor includes a housing 1 and a digital display screen 2 disposed on the housing 1; a sensor body is arranged in the shell 1, and comprises a terminal button 3, a mounting piece 6, a buffer component, a sensitive element assembly 11 and a connector 7; the terminal button 3 is rotatably arranged at the upper end of the mounting part 6, the connector 7 is arranged at the lower end of the mounting part 6, and the sensitive element assembly 11 is connected with the digital display screen 2;

the connector 7 is provided with an axial vent pipe I8, an air pressure sensing assembly is arranged in the vent pipe I8, the air pressure sensing assembly comprises a concave deformation film 13 and a retainer 24, the concave deformation film 13 is arranged on the retainer 24, a resistance strain gauge is arranged in the concave deformation film 13, and the resistance value of the resistance strain gauge can change when the resistance strain gauge is deformed; an air inlet pipe 14 is arranged at the upper end of the first vent pipe 8;

a movable cavity 9 is arranged in the mounting part 6, the sensitive element assembly 11 can be movably arranged in the movable cavity 9, an annular clamping plate 5 is arranged at the upper end of the sensitive element assembly 11 in the movable cavity 9, and the sensitive element assembly 11 is connected with the terminal button 3 through a lead 4;

the buffer assembly comprises a buffer air bag 12, a vent pipe II 15 and an air circuit on-off control assembly, and the buffer air bag 12 is arranged in the movable cavity 9 and is positioned at the upper end of the sensitive element assembly 11; one end of the second vent pipe 15 is communicated with the air inlet pipe 14, and the other end of the second vent pipe is communicated with the buffering air bag 12; an air path on-off control assembly (the structure of which is the same as that of the air path on-off control assembly) for controlling the on-off of the air inlet pipe 14 is also arranged on the air inlet pipe 14; the air path on-off control assembly comprises a containing cavity 17, an electromagnet 19, an iron block 23, a connecting rod 22, a return spring 21 and a ventilation piston 20, wherein the containing cavity 17 is arranged on the ventilation pipe two 15, two sides of the containing cavity are communicated with the ventilation pipe two 15, the ventilation piston 20 is movably arranged in the containing cavity 17, a ventilation cavity 16 is arranged in the ventilation piston 20, ventilation holes 18 are formed in two sides of the ventilation cavity 16, one end of the connecting rod 22 is connected with the ventilation piston 20, the other end of the connecting rod penetrates through the containing cavity 17 to be connected with the iron block 23, and the electromagnet 19 can generate magnetic force to attract the iron block 23 after being electrified.

In this embodiment, the sensing element assembly 11 is provided with an annular sealing ring 10 on the circumferential surface. The annular sealing ring can improve the sealing performance between the sensitive element assembly and the movable cavity.

In this embodiment, the ventilation hole 18 of the ventilation piston 20 is communicated with the ventilation pipe two 15 after the iron block 23 is attracted to the electromagnet 19.

In this embodiment, the aperture of the vent hole 18 is the same as the aperture of the vent pipe two 15.

The specific working process of the invention is as follows: the gas to be measured enters from the first vent pipe, the gas with normal pressure enters the movable cavity through the first vent pipe, the resistance strain gauge in the concave deformation film is slightly deformed in the period, the resistance is not changed to a set interval, the electromagnet is not electrified, the sensitive element assembly accurately measures the pressure of the gas, outputs a corresponding voltage value, and displays the corresponding voltage through the digital display screen; when the air pressure entering the first vent pipe is larger, the concave deformation film in the first vent pipe deforms under the action of the air pressure, the resistance strain gauge in the concave deformation film deforms, the resistance value changes, when the resistance value changes to a set interval, the control panel connected with the resistance strain gauge controls the two electromagnets to be electrified, the electromagnets generate suction force to be attracted with the iron block, the vent pipe I is communicated, the air inlet pipe is closed, air enters the buffering air bag through the vent pipe I, the buffering air bag is inflated and then swells, the gas pressure detection device has the advantages that a buffering effect is achieved on the sensitive element assembly, after a few seconds (2 seconds can be set here), the electromagnet close to the gas inlet pipe loses power, the ventilating piston is communicated with the gas inlet pipe, and gas enters the movable cavity from the gas inlet pipe to be detected for gas pressure detection; meanwhile, the air bag buffer and the sensitive element assembly are in flexible contact, so that the buffer effect is better; when the atmospheric pressure that gets into breather pipe one surpassed the atmospheric pressure that this sensor can bear, the spill deformation membrane in the breather pipe one produces great deformation (the deformation that is greater than the aforementioned condition) under the effect of atmospheric pressure, the resistance foil gage in the spill deformation membrane produces great deformation, the resistance changes, after the resistance changes another settlement interval, the control panel control setting that is connected with the resistance foil gage is electrified at the electro-magnet on intake pipe limit, the electro-magnet produces suction and iron plate actuation, the intake pipe is stopped up, prevent to lead to the inside components and parts of installed part impaired because of atmospheric pressure is too big.

The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.