CN208520519U - A kind of pressure transmitter and pressure-measuring system - Google Patents
A kind of pressure transmitter and pressure-measuring system Download PDFInfo
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- CN208520519U CN208520519U CN201821186181.1U CN201821186181U CN208520519U CN 208520519 U CN208520519 U CN 208520519U CN 201821186181 U CN201821186181 U CN 201821186181U CN 208520519 U CN208520519 U CN 208520519U
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Abstract
The utility model relates to a kind of pressure transmitter and pressure-measuring systems.The pressure transmitter (1) includes filter module (3), the filter module is connected to be filtered shaping to its collected signal with pressure sensor, and further include: modulation chip (4), it includes the operational amplifying module being sequentially connected, ADC conversion module, MCU digital signal processing module and DAC conversion module, and the operational amplifying module is connected with the filter module, for the sensor analog signals after filter shape to be processed into the analog signal of scale, it is then input to subsequent ADC conversion module, and modulation chip (4) is provided with the analogue communication interface of the analog output signal after being respectively used to output DAC conversion and the Interface for digital communication (2) of the digital output signal after output ADC conversion.The utility model has many advantages, such as that compact-sized, inexpensive, failure rate is low, measurement is convenient and high-precision, and especially has the ability for carrying out secondary development.
Description
Technical field
The utility model relates to chip technology field more particularly to a kind of monocrystalline silicon digital pressures of single-chip integral type
Transmitter and pressure-measuring system including the pressure transmitter.
Background technique
Such as the pressure transmitter of numerous types such as Intelligent pressure transmitter is as a kind of very useful site pressure
Instrument is detected, all various aspects such as national production, life have been widely used in.However, these existing pressure transmitters
Remain some defects and shortcoming.For example, although traditional pressure transmitter in structure and principle it is each not
It is identical, but they are larger in the prevalence of such as structure size, component is more, production technology is complicated, manufacturing cost is high, hold
The problems such as easily breaking down.
Utility model content
In view of this, the present invention provides a kind of pressure transmitter and pressure-measuring systems, thus effectively solve or
Alleviate one or more of problems above existing in the prior art and other aspect problems.
Firstly, according to the present utility model in a first aspect, it provides a kind of pressure transmitter comprising filter module,
The filter module is connected to be filtered shaping to its collected signal with pressure sensor, and the pressure transmitter also wraps
It includes: modulation chip comprising operational amplifying module, ADC conversion module, MCU digital signal processing module and the DAC being sequentially connected
Conversion module, and operational amplifying module is connected with the filter module, for will be by the Sensor Analog Relay System after filter shape
The analog signal of the proportional size of signal processing is then input to subsequent ADC conversion module；And it modulates chip to be provided with point
The analogue communication interface and the digital output signal after output ADC conversion of analog output signal after DAC conversion Yong Yu not exported
Interface for digital communication.
Analog output signal refer to sensor signal by ADC, handled using MCU after, finally by DAC conversion generation
The analog signal of table 4-20mA current or voltage.This structure design of the invention can increase instrument sensitivity and precision, and
And the modulation chip is provided with after ADC is converted, 24 bit digital quantities by temperature compensation, tape symbol position.Preferably, the number
Amount is exported by the Interface for digital communication (SPI or I2C interface) that chip carries.
In pressure transmitter according to the present utility model, optionally, the modulation chip further include:
Temperature detecting module is connected, for detecting with the pressure sensor and the MCU digital signal processing module
The actual temperature of the pressure sensor is simultaneously sent to the MCU digital signal processing module and is handled, to the pressure
The collected signal of sensor carries out temperature-compensating and correcting process.
In pressure transmitter according to the present utility model, optionally, the Interface for digital communication is SPI interface or I2C
Interface, for exporting the digital output signal after temperature-compensating and correcting process, without temperature-compensating and correcting process
Digital output signal and/or detected pressure sensor actual temperature.
In pressure transmitter according to the present utility model, optionally, the modulation chip and the pressure sensor quilt
It is arranged to integral structure.
In pressure transmitter according to the present utility model, optionally, the modulation chip is arranged in the pressure sensing
In the shell of device.
In pressure transmitter according to the present utility model, optionally, the pressure transmitter further includes power conversion mould
Block and peripheral circuit, the power conversion module be connected with power supply and with the filter module, the modulation chip and described
Peripheral circuit is connected to provide them electric energy, the peripheral circuit be connected with the modulation chip for be provided out electric current or
Voltage.
In pressure transmitter according to the present utility model, optionally, the filter module is via the pressure sensor
Sensor signal output interface be connected with the pressure sensor, the power conversion module and the sensor signal export
Interface is connected for providing electric energy to the pressure sensor.
In pressure transmitter according to the present utility model, optionally, the peripheral circuit is configured to be provided out 4-
The electric current of 20mA.
In pressure transmitter according to the present utility model, optionally, the pressure sensor is single-chip integral type
Monocrystalline-silicon pressure transducer.
In addition, second aspect according to the present utility model, it provides a kind of pressure-measuring system, the pressure measurement system
System includes the pressure transmitter as described in any of the above item.
From combined with attached drawing it is described in detail below in, it will each technical side according to the present utility model is expressly understood
Principle, feature, feature and advantage of case etc..For example, it will be understood that pressure transmitter according to the present utility model has
It is compact-sized, inexpensive, failure rate is low, measurement is convenient and high-precision etc. many merits, it can use one-piece integrated structure,
And has the ability for carrying out secondary development, especially to meet higher functional requirement.
Detailed description of the invention
The technical solution of the utility model is described in further detail below with reference to drawings and examples, still
It should be known that these attached drawings only design for explanatory purposes, it is meant only to conceptually illustrate structure structure described herein
It makes, without to be drawn to scale.
Fig. 1 is the composition schematic diagram of a pressure transmitter embodiment according to the present utility model.
Specific embodiment
Firstly, it is necessary to explanation, illustrated below by by way of example the utility model pressure transmitter and
Structure, composition, features and advantages of pressure-measuring system etc., however all descriptions are intended merely to be illustrated, without that should incite somebody to action
They are interpreted as constituting the utility model any limitation.
In addition, for any single technical characteristic for being described by or implying in the embodiment mentioned by this paper, or
Shown or implicit any single technical characteristic in the drawings, the utility model still allow for these technical characteristics (or
Its equivalent) between continue any combination or delete that any technology barrier may be not present, to be also regarded as this
A little more embodiments according to the present utility model are within the record scope of this paper.In addition, the technology being related to herein
Term " connection " not only contains the mode being directly connected to, but also also contains the mode being indirectly connected with.
Basic group of a pressure transmitter embodiment according to the present utility model is only exemplarily shown in Fig. 1
At situation.In this embodiment, pressure transmitter 1 may include filter module 3, modulation chip 4, power conversion module 5 and outer
Enclose circuit 6, below be just specifically described in conjunction with this example.
For filter module 3, it is attached with pressure sensor (not shown), is used to by pressure
The collected signal of sensor (such as the voltage signal etc. for representing site pressure size) is filtered Shape correction, to improve
Signal quality carries out post-processing.As illustrating, filter module 3 can be directly connected to as shown in Figure 1
Thus the sensor signal output interface 8 of pressure sensor obtains collected signal from pressure sensor.Certainly, one
Under a little application scenarios, the utility model also allows to be further added by some possible units, module in filter module 3 and pressure sensor
Or component etc., so that various actual demands can be met more flexiblely.
In this embodiment, modulation chip 4 may include sequentially connected operational amplifying module, ADC conversion module
(Analog-to-Digital Converter: analog-digital converter module), MCU (Microprogrammed Control
Unit: mini program controlling unit) signal processing module and DAC conversion module (Digital-to-Analog Converter: number
Mode converter module), and operational amplifying module therein is attached with above-mentioned filter module 3, can so be passed through
The modulation chip 4 will be filtered the mould that the sensor analog signals after shaping are processed into scale by filter module 3
Quasi- signal is then input to subsequent ADC conversion module, then can be connect respectively by the analogue communication on the modulation chip 4
Mouth and Interface for digital communication 2, such as SPI interface (Serial Peripheral Interface (SPI)), I2C interface (a kind of two-wire system serial transmission bus)
Deng, outward export DAC conversion after analog output signal and output ADC conversion after digital output signal, it is such simulation it is defeated
Signal can be using any suitable forms such as voltage signal or current signals out.
More specifically, operational amplifying module can be used to the pressure after filter shape obtained from filter module 3
Sensor acquisition signal amplifies processing, and ADC conversion module can be used to via the letter after operational amplifying module enhanced processing
It number is handled to generate and export corresponding digital output signal, MCU digital signal processing module can be used to pressure sensing
Device acquires signal and carries out temperature-compensating and correcting process processing (this will be described below), and DAC conversion module can be used to
Corresponding analog output signal is generated and exported to being handled via the signal after operational amplifying module enhanced processing.
As described above, believing from the analog signal of input pressure sensor to corresponding analog signal-current or voltage is exported
Number-or whole treatment processes of digital output signal can be completed using single modulation chip 4.Therefore, with existing skill
Art compares, and the institute for being not only able to achieve conventional pressure transmitter using the above modulation chip 4 is functional, but also can successfully overcome
The problems such as structure is complicated, component is more, manufacturing process is complicated, product cost is high present in these conventional pressure transmitters, from
And the structure of product is simplified significantly, and the effectively save cost of energy, simplify production procedure, reduces the failure rate of product, because
This pressure sensor according to the present utility model has the characteristics that intelligentized, has the advantage for being substantially better than the prior art.
For modulating chip 4, temperature detecting module may further be configured in alternative circumstances, the temperature detection mould
Block is attached with pressure sensor and MCU digital signal processing module, the practical temperature in the scene for detecting pressure sensor
Degree, and the actual temperature data that will test sends MCU digital signal processing module to and is handled, so as to for passing through
The collected signal of pressure sensor carries out temperature-compensating and correcting process, it is possible thereby to produced by promoting and export digital defeated
Signal or analog output signal have higher precision out.As illustrating, MCU digital signal processing module can be according to interior
It sets algorithm and transferring and is pre-stored within the compensating parameter in modulation chip 4 to carry out temperature-compensating and correcting process, such as can be with
Corresponding numerical value processing is carried out using linear correcting mode.
It should be pointed out that due to being specially configured with such as can be used SPI interface or I2C interface in modulation chip 4
The Interface for digital communication 2 of form has been carried out above-mentioned temperature-compensating and correcting process treated that number is defeated for exporting outward
Out signal, without by temperature-compensating and the digital output signal of correcting process and/or showing for detected pressure sensor
Field actual temperature, therefore the user of the pressure sensor of the utility model more targetedly choosings can be provided according to
It selects.In addition, by providing Interface for digital communication 2, it can will be by the number after the ADC conversion module conversion process in modulation chip 4
Word signal easily directly exports, so as to have carry out product secondary for pressure sensor according to the present utility model
The ability of exploitation can be basic herein that is, if having higher, more complicated functional requirement for pressure transmitter
On very easily realize secondary development.
Referring again to Fig. 1, it is also provided with power conversion module 5 and peripheral circuit 6 in pressure transmitter 1, just connects below
Introduce the two parts.
For power conversion module 5, it is connected with power supply, filter module 3, modulation chip 4 and peripheral circuit 6,
To be provided required for normal work by it for the above module or component after the power conversion module 5 powers on
Electric energy.As shown in Figure 1, in alternative circumstances, power input interface 7 can be arranged in pressure transmitter 1, by becoming power supply
Mold changing block 5 and power supply are all connected to provide electric energy in itself on the power input interface 7 for power conversion module 5.
In addition, in alternative circumstances, it can be by the sensor signal output interface of power conversion module 5 and pressure sensor
8 are attached, and electric energy are provided will pass through the power conversion module 5 for the pressure sensor, to facilitate in-site measurement work
Make without in addition configuring power supply for pressure sensor, this also contributes to the overall structure for simplifying pressure transmitter, and reduces
Product cost.
For peripheral circuit 6, it is arranged on the periphery of modulation chip 4 and is connected with the modulation chip 4, is used for
Export desired voltage or electric current outward to facilitate live practical application.For example, as shown in Figure 1, can by peripheral circuit 6 with
Above-mentioned power input interface 7 is connected, and the electric current of 4-20mA is provided out by the peripheral circuit 6, so as to for for example mostly
The single field application of number functional requirement brings very big convenience.
For those skilled in the art, made by illustratively introducing above-described embodiment according to originally practical new
The contents such as basic composition, working principle and the technical advantage of the pressure transmitter of type are easy to understand.It is to be understood, however, that
Be, in the case where not departing from the utility model purport, the utility model allow to carry out various possible flexible designs, change and
Adjustment, preferably to meet practical application request.
For example, in some embodiments, modulation chip 4 and pressure sensor can be arranged to integral structure, such as
Modulation chip 4 can be set up directly in the shell of pressure sensor, so as to form the intelligent of integral type single-chip
Pressure transmitter reduces cost and reduces peripheral component thus, it is possible to effectively simplify overall structure, and uses this succinct
Structure also advantageously reduces the failure rate of product very much.
Certainly, in some cases, it is also possible to above-mentioned modulation chip 4 and pressure sensor are individually arranged,
Without they are arranged together.
In addition, pressure sensor can use monocrystalline silicon pressure sensing in pressure transmitter according to the present utility model
Device, by the monocrystalline-silicon pressure transducer and filter module, modulate chip or further include other modules discussed above or
Component etc. is cooperated, so that it may complete Intelligent pressure transmitter from the acquisition signal of monocrystalline-silicon pressure transducer to operation
Amplification module, ADC conversion module, DAC conversion module carry out a variety of data processings, carry out temperature-compensating and correcting process etc. these
Function is having high-precision while realizing less trouble so that product structure greatly simplifies.
In conclusion due to pressure transmitter according to the present utility model have be substantially better than existing pressure transmitter this
A little technical advantages, therefore be very suitable to for the pressure transmitter being configured in pressure-measuring system, for providing corresponding pressure
Detection function.As a result, can also be likewise supplied with such as institute above according to the pressure-measuring system that the utility model design provides
These the significant technical advantages discussed.
Pressure transmitter according to the present utility model and pressure-measuring system is only elaborated by way of example above, this
A few examples are only for illustrating that the principles of the present invention and embodiments thereof are used, rather than limitations of the present invention, do not taking off
In the case where spirit and scope from the utility model, those skilled in the art can also make various changes and improvements.Therefore,
All equivalent technical solutions should belong to the scope of the utility model and be limited by every claim of the utility model.
Claims (10)
1. a kind of pressure transmitter comprising filter module (3), the filter module (3) are connected to it with pressure sensor
Collected signal is filtered shaping, which is characterized in that the pressure transmitter (1) further include: modulation chip (4), packet
The operational amplifying module being sequentially connected, ADC conversion module, MCU digital signal processing module and DAC conversion module are included, and described
Operational amplifying module is connected with the filter module (3), for being processed into the sensor analog signals after filter shape
The analog signal of scale is then input to subsequent ADC conversion module, and the modulation chip (4) is provided with difference
For exporting the analogue communication interface of the analog output signal after DAC is converted and exporting the digital output signal after ADC conversion
Interface for digital communication (2).
2. pressure transmitter according to claim 1, which is characterized in that the modulation chip (4) further include: temperature detection
Module is connected, for detecting the pressure sensor with the pressure sensor and the MCU digital signal processing module
Actual temperature is simultaneously sent to the MCU digital signal processing module and is handled, to the collected letter of the pressure sensor
Number carry out temperature-compensating and correcting process.
3. pressure transmitter according to claim 2, which is characterized in that the Interface for digital communication (2) be SPI interface or
I2C interface, for exporting the digital output signal after temperature-compensating and correcting process, without temperature-compensating and Corrections Division
The actual temperature of the digital output signal of reason and/or detected pressure sensor.
4. pressure transmitter according to claim 1, wherein the modulation chip (4) is set with the pressure sensor
It is set to integral structure.
5. pressure transmitter according to claim 4, wherein the modulation chip (4) is arranged in the pressure sensor
Shell in.
6. pressure transmitter according to any one of claim 1 to 5, wherein the pressure transmitter (1) further includes electricity
Source conversion module (5) and peripheral circuit (6), the power conversion module (5) be connected with power supply and with the filter module
(3), the modulation chip (4) is connected to provide them electric energy, the peripheral circuit (6) and institute with the peripheral circuit (6)
Modulation chip (4) is stated to be connected for being provided out current or voltage.
7. pressure transmitter according to claim 6, wherein the filter module (3) is via the pressure sensor
Sensor signal output interface (8) is connected with the pressure sensor, the power conversion module (5) and the sensor signal
Output interface (8) is connected for providing electric energy to the pressure sensor.
8. pressure transmitter according to claim 6, wherein the peripheral circuit (6) is configured to be provided out 4-
The electric current of 20mA.
9. pressure transmitter according to any one of claim 1 to 5, wherein the pressure sensor is single-chip one
The monocrystalline-silicon pressure transducer of body formula.
10. a kind of pressure-measuring system, which is characterized in that the pressure-measuring system includes such as any one of claim 1-9
The pressure transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821186181.1U CN208520519U (en) | 2018-07-25 | 2018-07-25 | A kind of pressure transmitter and pressure-measuring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821186181.1U CN208520519U (en) | 2018-07-25 | 2018-07-25 | A kind of pressure transmitter and pressure-measuring system |
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| CN208520519U true CN208520519U (en) | 2019-02-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389258A (en) * | 2017-07-14 | 2017-11-24 | 成都众山科技有限公司 | The method for inspecting of pressure transmitter |
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2018
- 2018-07-25 CN CN201821186181.1U patent/CN208520519U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389258A (en) * | 2017-07-14 | 2017-11-24 | 成都众山科技有限公司 | The method for inspecting of pressure transmitter |
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