Pressure transmitter with compact structure

Abstract

The utility model provides a pressure transmitter with a compact structure, and the pressure transmitter comprises a wire plugging seat which is provided with a first end and a second end opposite to the first end, the second end of the wire plugging seat is provided with a cavity, and the first end is provided with a pressure leading port; one end of the shell main body is fixedly connected with the second end of the base in a sleeving manner; the pressure-sensitive element is arranged in the cavity of the base adjacent to the shell main body; the wiring terminal is fixedly arranged in the pressure guiding opening; wherein the pressure leading port and the cavity are arranged at an interval, the wiring terminal is electrically connected with the pressure-sensitive element, the pressure-sensitive element is composed of a silicon carbide wafer and a pressure-sensitive resistor integrated on the surface of one side of the silicon carbide wafer, and the pressure-sensitive resistor forms a Wheatstone bridge. According to the pressure transmitter, the surface of one side of the silicon-based substrate is integrated with the piezoresistor forming the single-arm bridge, so that the size of the pressure-sensitive element is reduced to a great extent, and the pressure transmitter is compact in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure transmitters, in particular to a pressure transmitter with a compact structure. Background Art

[0002] A pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission. Conventional pressure transmitters include pressure-sensitive elements and control circuits. In conventional pressure transmitters, the overall structure and internal component design are not compact enough, making the overall volume of the product larger.

[0003] Therefore, it is urgent to propose a pressure transmitter with a compact structure to solve the technical problem in the prior art that the overall structure and internal components of the pressure transmitter are not compact enough, resulting in a relatively large overall volume of the product. Utility Model Content

[0004] Aiming at the technical problem that the overall structure and internal components of the pressure transmitter in the prior art are not compact enough, resulting in a relatively large overall volume of the product, the utility model proposes a pressure transmitter with a compact structure.

[0005] In a preferred embodiment of the present utility model, a compact pressure transmitter is provided, the pressure transmitter comprising:

[0006] A plug-in socket, the plug-in socket having a first end and a second end opposite to the first end, the second end of the plug-in socket being provided with a cavity, and the first end being provided with a pressure inlet;

[0007] A shell body, one end of which is sleeve-fastened to the second end of the base;

[0008] a pressure-sensitive element disposed in a cavity of the base adjacent to the housing body;

[0009] A wiring terminal is fixed in the pressure inlet; wherein,

[0010] The pressure inlet is spaced apart from the cavity, and the pressure-sensitive element is sealed with the inner side wall of the cavity by a sealant;

[0011] One end of the housing body sleeved with the base abuts against the pressure-sensitive element, and a sealing rubber ring is provided at the abutment;

[0012] The connection terminal is electrically connected to the varistor, which is composed of a silicon carbide wafer and a varistor integrated on one side surface of the silicon carbide wafer, and the varistor forms a Wheatstone bridge.

[0013] Preferably, an instrument amplifier, an analog-to-digital converter and a DSP processor are connected downstream of the wiring terminal.

[0014] Preferably, a sealant is provided at a sleeve fixing position between one end of the shell body and the base.

[0015] Preferably, the instrumentation amplifier amplifies the output voltage from the pressure sensitive element to match the level required by the analog-to-digital converter.

[0016] Preferably, the analog-to-digital converter converts the amplified output voltage into a digital signal.

[0017] Preferably, the DSP processor is used to process the digital signal.

[0018] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0019] A compact pressure transmitter terminal of the present application is electrically connected to the pressure-sensitive element, and the pressure-sensitive element is composed of a silicon carbide wafer and a varistor integrated on the surface of one side of the silicon carbide wafer. The varistor forms a Wheatstone bridge, and the overall volume of the pressure transmitter is reduced by utilizing a highly integrated component layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and their implementation methods.

[0021] Figure 1 A pressure transmitter in one embodiment of the present invention is shown;

[0022] Figure 2 A schematic diagram of the structural composition of a pressure transmitter pressure sensitive element in one embodiment of the utility model is shown. DETAILED DESCRIPTION

[0023] The various aspects of the utility model are further described in detail below.

[0024] Unless otherwise defined or indicated, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein can be applied to the present invention.

[0025] Unless otherwise clearly specified and limited, the "or" mentioned in the present invention includes the relationship of "and". The "and" is equivalent to the Boolean logic operator "AND", the "or" is equivalent to the Boolean logic operator "OR", and "AND" is a subset of "OR".

[0026] It is to be understood that although the terms "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, the first element may be referred to as the second element without departing from the teachings of the present invention.

[0027] In the present invention, the terms “mainly composed of” and “consisting of” are included in the terms “containing”, “including” or “comprising”.

[0028] Unless otherwise clearly specified and limited, the terms "connected", "connected" and "connection" in the present invention should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] For example, if an element (or component) is referred to as being on, coupled to, or connected to another element, the element may be directly formed on, coupled to, or connected to the other element, or there may be one or more intervening elements between them. In contrast, if the expressions "directly on," "directly coupled to," and "directly connected to" are used herein, then no intervening elements are indicated. Other words used to describe the relationship between elements should be similarly interpreted, such as "between" and "directly between," "attached" and "directly attached," "adjacent" and "directly adjacent," and the like.

[0030] It should also be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The words "inner" and "outer" used refer to directions toward or away from the geometric center of a particular component, respectively. It can be understood that these terms are used here to describe the relationship of one element, layer or region relative to another element, layer or region as shown in the drawings. In addition to the orientations described in the drawings, these terms should also include other orientations of the device.

[0031] Other aspects of the present invention will be apparent to those skilled in the art from the disclosure herein.

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0033] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show the components related to the present application and are not drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation may be changed arbitrarily, and the component layout may also be more complicated. For example, the thickness of the components in the drawings may be exaggerated for the sake of clarity.

[0034] Example

[0035] As attached Figure 1-2 As shown, the utility model realizes a compact pressure transmitter, and the pressure transmitter comprises:

[0036] A plug-in socket 450, wherein the plug-in socket 450 has a first end and a second end opposite to the first end, the second end of the plug-in socket 450 is provided with a cavity, and the first end is provided with a pressure inlet;

[0037] A housing body 460, one end of which is sleeved and fixed to the second end of the plug socket 450;

[0038] A pressure-sensitive element 400 , wherein the pressure-sensitive element 400 is disposed in a cavity of the plug socket 450 adjacent to the housing body 460 ;

[0039] The wiring terminal 406 is fixed in the pressure inlet; wherein,

[0040] The pressure inlet is spaced apart from the cavity, and the pressure-sensitive element 400 is sealed with the inner side wall of the cavity by a sealant 457;

[0041] One end of the housing body 460 that is sleeved with the plug socket 450 abuts against the pressure sensitive element 400, and a sealing rubber ring 470 is provided at the abutment;

[0042] The connection terminal 406 is electrically connected to the varistor 400 . The varistor 400 is composed of a silicon carbide wafer 401 and a varistor 402 integrated on one side of the silicon carbide wafer. The varistor 402 forms a Wheatstone bridge.

[0043] It should be noted that, in the Wheatstone bridge circuit, the varistor 402 forms four resistor modules with equal organization, and the four resistor modules are respectively located in four arms of the Wheatstone bridge circuit.

[0044] Preferably, an instrument amplifier, an analog to digital converter (ADC) and a DSP (Digital Signal Processing) processor are connected downstream of the wiring terminal 406 .

[0045] It should be noted that ADC usually refers to an electronic component that converts analog signals into digital signals. A common analog-to-digital converter converts an input voltage signal into an output digital signal. The DSP chip uses a Harvard structure that separates program and data, has a dedicated hardware multiplier, widely uses pipeline operations, and provides special DSP instructions that can be used to quickly implement various digital signal processing algorithms.

[0046] Preferably, a sealant 480 is provided at a socket fixing position between one end of the shell body and the base.

[0047] Preferably, the instrumentation amplifier amplifies the output voltage from the pressure sensitive element to match the level required by the analog-to-digital converter.

[0048] Preferably, the analog-to-digital converter converts the amplified output voltage into a digital signal.

[0049] Based on this application, it should be understood by those skilled in the art that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0050] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

[0051] All documents mentioned in this utility model are cited as references in this application, just as each document is cited as reference separately. In addition, it should be understood that after reading the above content of this utility model, those skilled in the art can make various changes or modifications to this utility model, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A compact pressure transmitter, characterized in that: The pressure transmitter comprises: A plug-in socket, the plug-in socket having a first end and a second end opposite to the first end, the second end of the plug-in socket being provided with a cavity, and the first end being provided with a pressure inlet; A shell body, one end of which is sleeved and fixed to the second end of the plug socket; A pressure-sensitive element, the pressure-sensitive element being disposed in a cavity of the plug socket adjacent to the housing body; A wiring terminal is fixed in the pressure inlet; wherein, The pressure inlet is spaced apart from the cavity, and the pressure-sensitive element is sealed with the inner side wall of the cavity by a sealant; One end of the housing body that is sleeved with the plug socket abuts against the pressure-sensitive element, and a sealing rubber ring is provided at the abutment; The connection terminal is electrically connected to the varistor, which is composed of a silicon carbide wafer and a varistor integrated on one side surface of the silicon carbide wafer, and the varistor forms a Wheatstone bridge.

2. A compact pressure transmitter as claimed in claim 1, characterized in that: An instrument amplifier, an analog-to-digital converter and a DSP processor are connected downstream of the wiring terminal.

3. A compact pressure transmitter as claimed in claim 2, characterized in that: A sealant is provided at a sleeve fixing position between one end of the shell body and the plug socket.

4. A compact pressure transmitter as claimed in claim 3, characterized in that: The instrumentation amplifier amplifies the output voltage from the piezoresistor to match the level required by the analog-to-digital converter.

5. A compact pressure transmitter as claimed in claim 4, characterized in that: The analog-to-digital converter converts the amplified output voltage into a digital signal.

6. A compact pressure transmitter as claimed in claim 5, characterized in that: The DSP processor is used to process the digital signal.

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