CN105181238B - A kind of ceramic pressure sensor zero range regulating device - Google Patents
A kind of ceramic pressure sensor zero range regulating device Download PDFInfo
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- CN105181238B CN105181238B CN201510300270.9A CN201510300270A CN105181238B CN 105181238 B CN105181238 B CN 105181238B CN 201510300270 A CN201510300270 A CN 201510300270A CN 105181238 B CN105181238 B CN 105181238B
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Abstract
A kind of ceramic pressure sensor zero range regulating device, for zero and range governing loop in ceramic pressure sensor production process.Digital regulation resistance is combined by the present invention with ceramic thick film structure, adjusts sensor zero point；Digital regulation resistance is combined with sensor preamplifier, adjusts transducer range.The present invention includes signal transmitting plate, zero range adjustable plate and computer, and the signal transmitting plate passes through I for ceramic pressure sensor pressure signal to be changed into digital signal2C interface exports, and the zero range adjustable plate couples the signal transmitting plate and the computer realizes the manually and automatically adjusting of zero and range.There is the present invention significant technological progress should be able to bring considerable economic benefit.
Description
Technical field
The present invention relates to the detection device in a kind of ceramic pressure sensor production process, more particularly to ceramic pressure senses
Device zero range regulating device, belongs to sensor production technical field of measurement and test.
Background technology
Ceramic material has the characteristics such as anticorrosive, wear-resistant, high resiliency, shock resistance and vibration, its operating temperature range
Up to -40 DEG C~135 DEG C, electric insulation degree ＞ 2kV, the pressure sensor done using ceramic material is strong with output signal, surveys
Accuracy of measurement is high, stablizes the features such as high.Have the characteristics that just because of the pressure sensor that ceramic material is done it is above, in countries such as America and Europes
Ceramic pressure sensor is greatly developed, there is the trend for substituting other type sensors comprehensively, in China also more and more use
Family substitutes diffusion silicon pressure sensor using ceramic sensor element.
Ceramic thick film structural pressure sensor is the great again of the pressure sensor after diffusion silicon pressure sensor
Technological innovation, be one kind have excellent performance, low-cost novel pressure sensor.Ceramic elastomer performance is excellent, smooth, equal
Material even, that matter is close all follows strictly Hooke's law, plastic-less deformation in extent and scope.Thick-film resistor (including high temperature wire)
It can be securely sintered together with ceramic flexible sheet, be not required to be pasted with glue.This rigid structure creep is small, and drift is small,
Static properties is stablized, and dynamic property is good, compared with diffusion silicon pressure sensor, is not required to semiconductor planar technique to form diffusion electricity
Flexible sheet is hindered, early investment and the technique processing cost of production line are significantly reduced.Ceramic thick film structure resistant to liquid or gas
The corrosion of body medium, be not required to by the conversion of stainless steel diaphragm and silicone oil be isolated, encapsulating structure simplifies, and further decreases into
This.In ceramic pressure sensor production process, zero adjusting is necessary process, when the characteristic for measuring different pressures sensor
When, there is zero point comparison theorems phenomenon in discovery.
General pressure sensor output is the analog voltage signal of mV ranks, needs to be sent into amplifier link nearby and put
Greatly.Some amplifiers are integrated with transmitter, and transmitter exports the voltage signal of 0--10V or the electric current of 4--20mA
Signal.Ceramic pressure sensor of the present invention directly exports number I2C interface signal realizes that zero and range are manual in production link
And automatic adjustment.
Invention content
A kind of ceramic pressure sensor zero range tune is provided the invention aims to overcome the deficiencies in the prior art
Regulating device, the device are used for the I of ceramic pressure sensor output pressure2C interface signal, and realized during sensor production
Zero and range are manually and automatic adjustment.
In order to achieve the above objectives, the technical solution adopted by the present invention is：A kind of ceramic pressure sensor zero range adjusting
Device comprising signal transmitting plate, zero range adjustable plate and computer.The signal transmitting plate is for sensing ceramic pressure
Device pressure signal changes into digital signal and passes through I2C interface exports, the regulation ring of zero and range during sensor production
Section, signal transmitting plate output access the zero range adjustable plate and the computer, complete in production process zero and
The manually or automatically governing loop of range.
Optimally, one bridge arm parallel digital potentiometer of sensor in the signal transmitting plate, the digital regulation resistance is by institute
It states microcontroller in zero range adjustable plate to control, realizes that zero is adjusted manually by the potentiometer in the zero range adjustable plate
Section, the computer send instruction to microcontroller in zero range adjustable plate by RS232 interface and realize that zero automatically adjusts.
Optimally, parallel digital potentiometer in pre-amplification circuit in the signal transmitting plate, the digital regulation resistance is by institute
It states microcontroller in zero range adjustable plate to control, transducer range hand is realized by the potentiometer in the zero range adjustable plate
Dynamic to adjust, the computer sends instruction to microcontroller in zero range adjustable plate by RS232 interface and realizes transducer range
Automatic adjustment.
Optimally, the computer is communicated with the zero range adjustable plate by RS232, the number pressure read
According to then by pressure data and the value difference of setting away from the knots modification for being converted into digital regulation resistance, being transmitted to by RS232 interface described
Zero range adjustable plate, then pass through I2C interface is transmitted to signal transmitting plate, to realize automatic adjustment sensor zero point and range.
Due to the adoption of the above technical scheme, beneficial effects of the present invention：To produce ceramic pressure sensor in enormous quantities, adjusting
It saves zero and range link provides working condition.
Description of the drawings
Attached drawing 1 is a kind of ceramic pressure sensor zero range regulating device technical solution block diagram of the present invention；
Attached drawing 2 is a kind of ceramic pressure sensor zero range regulating device signal transmitting plate functional block diagram of the present invention；
Attached drawing 3 is a kind of ceramic pressure sensor zero range regulating device zero range adjustable plate principle frame of the present invention
Figure；
Specific implementation mode
Embodiment of the present invention is described in detail below in conjunction with attached drawing 1：
A kind of technical solution of ceramic pressure sensor zero range regulating device as shown in Figure 1, including it is thick with ceramics
Pressure signal is transformed into digital signal and passes through I by the signal transmitting plate 1 that membrane structure is linked together2C interface exports, zero amount
Journey adjustable plate 2 couples with the signal transmitting plate 1, passes through I2C interface reads pressure data and sends instruction, computer 3 and institute
The connection of zero range adjustable plate 2 is stated, pressure data is read by RS232 interface and sends instruction.
Embodiment of the present invention is described in detail below in conjunction with attached drawing 2：
It is illustrated in figure 2 a kind of ceramic pressure sensor zero range regulating device signal transmitting plate principle frame of the present invention
Figure comprising ceramic thick film structural strain bridge circuit 1, strain bridge arm parallel digital potentiometer 2, the leading sensor being sequentially connected
Amplifying circuit 3, preposition amplification parallel feedback digital regulation resistance 4, analog-to-digital conversion circuit 5, microcontroller 6, I2C data interface 7.
The wherein digital regulation resistance 2 and the digital regulation resistance 4 is controlled by microcontroller 6, and microcontroller 6 gives this 2 digital current potentials
Device sends instruction, adjusts digital regulation resistance resistance value.
If Fig. 3 is a kind of ceramic pressure sensor zero range regulating device zero range adjustable plate principle frame of the present invention
Figure comprising the I being sequentially connected2C data interface 1, microcontroller 2, the LED carried on plank show 3, rotary switch 4, RS232
Interface 5.The rotary switch 4 includes two knobs, and one adjusts sensor zero point for manual, another for adjusting manually
Save transducer range.
The present invention realizes the principle that zero is adjusted in ceramic pressure sensor production：Ceramic thick film structure described in Fig. 2
Bridge circuit 1 is strained, when not adding external force, Wheatstone bridge should balance, bridge output voltage zero.If null offset at this time,
The microcontroller 6 detects that voltage is not zero, and can send out instruction to the digital regulation resistance 2, correct its resistance value, Zhi Dao electricity
Bridge Differential Output voltage is zero.
The present invention realizes the principle that range is adjusted in ceramic pressure sensor production：Preposition amplification electricity described in Fig. 2
Road 4, the parallel digital potentiometer 4 in its backfeed loop, the amplification factor of preamplifier, institute can be adjusted by adjusting the potentiometer
The microcontroller 6 stated sends out instruction according to range setting value, to the digital regulation resistance 4, its resistance value is corrected, until preposition amplification
The amplification factor of circuit meets set amount range request.
There are two types of sensor zero points and the modified process of range, manual correction and automatic amendment, manual correction：Institute in Fig. 3
The microcontroller 2 stated detects the change of rotary switch 4 in Fig. 3, passes through the I described in Fig. 32Described in C data interface 1 and Fig. 2
I2C data interface 7 is transmitted to microcontroller 6 described in Fig. 2, to change digital regulation resistance 2 or the digital current potential described in Fig. 2
The resistance value of device 4 is realized and adjusts requirement.It is automatic to correct：Rotary switch 4 in Fig. 3 will be adjusted in manual correction, be changed to described in Fig. 1
Computer 3 by RS232 interface described in Fig. 3, transmit zero and range regulating command to the microcontroller 2 described in Fig. 3.
A kind of ceramic pressure sensor zero range regulating device implemented above to the present invention is explained and says
Bright, the zero and range that can easily and efficiently complete in ceramic pressure sensor production process are adjusted.The present invention will be with letter
Number pick-up plate scm software, zero range adjustable plate scm software, computer automatic adjustment zero and range software
It is used in combination.There is the present invention significant technological progress should be able to bring considerable economic benefit.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow be familiar with this field technology
Personage can understand present disclosure and be implemented, and it is not intended to limit the scope of the present invention, all according to this hair
Equivalent change or modification made by bright Spirit Essence should all cover within the scope of the present invention.
Claims (4)
1. a kind of ceramic pressure sensor zero range regulating device, be used in ceramic pressure sensor production process zero and
Range governing loop, including signal transmitting plate, zero range adjustable plate and computer, the signal transmitting plate are used to press on ceramics
Force snesor pressure signal changes into digital signal and passes through I2C interface exports, and the zero range adjustable plate couples the signal and becomes
Plate and the computer is sent to realize the manually and automatically adjusting of zero and range, between zero range adjustable plate and signal transmitting plate
Pass through I2C interface communicates, and is communicated by RS232 interface between zero range adjustable plate and computer, the computer connection zero
Automatic adjustment of the point range adjustable plate for zero and range in production process；
The structure of the signal transmitting plate, including be sequentially connected ceramic thick film structural strain bridge circuit 1, strain bridge arm parallel connection number
Word potentiometer 2, sensor preamplifier circuit 3, preposition amplification parallel feedback digital regulation resistance 4, analog-to-digital conversion circuit 5,
Microcontroller 6, I2C data interface 7, wherein digital regulation resistance 2 and digital regulation resistance 4 are controlled by microcontroller 6, microcontroller 6 give this 2
A digital regulation resistance sends instruction, adjusts digital regulation resistance resistance value；
The structure of zero range adjustable plate, including the I that is sequentially connected2C data interface 1, microcontroller 2, the LED that carries on plank are aobvious
Show 3, rotary switch 4, RS232 interface 5, wherein rotary switch 4 includes two knobs, and one for adjusting sensor zero manually
Point, another for adjusting transducer range manually.
2. a kind of ceramic pressure sensor zero range regulating device according to claim 1, it is characterised in that：The signal
One bridge arm parallel digital potentiometer of sensor in pick-up plate, digital regulation resistance microcontroller in by the zero range adjustable plate
Control realizes that zero is adjusted manually by the potentiometer in the signal transmitting plate, and the computer gives zero by RS232 interface
Microcontroller sends instruction and realizes zero automatic adjustment in point range adjustable plate.
3. a kind of ceramic pressure sensor zero range regulating device according to claim 1, it is characterised in that：The signal
Parallel digital potentiometer in pre-amplification circuit in pick-up plate, digital regulation resistance microcontroller in by the zero range adjustable plate
Control realizes that transducer range is adjusted manually by the potentiometer in the signal transmitting plate, and the computer is connect by RS232
Mouth sends instruction to microcontroller in zero range adjustable plate and realizes that transducer range automatically adjusts.
4. a kind of ceramic pressure sensor zero range regulating device according to claim 1, it is characterised in that：The meter
Calculation machine is communicated with the zero range adjustable plate by RS232, the pressure data read, then by the value of pressure data and setting
Gap is converted into the knots modification of digital regulation resistance, the zero range adjustable plate is transmitted to by RS232 interface, then pass through I2C
Interface is transmitted to signal transmitting plate, to realize automatic adjustment sensor zero point and range.
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| CN201510300270.9A CN105181238B (en) | 2015-06-04 | 2015-06-04 | A kind of ceramic pressure sensor zero range regulating device |
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| CN201510300270.9A CN105181238B (en) | 2015-06-04 | 2015-06-04 | A kind of ceramic pressure sensor zero range regulating device |
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| CN105181238B true CN105181238B (en) | 2018-08-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106441403B (en) * | 2016-09-19 | 2019-03-08 | 苏州戎维邦信息技术有限公司 | Bridge type magnetic sensor initial zero position voltage adjusting zero method |
| CN108007640B (en) * | 2017-11-27 | 2020-04-14 | 广西防城港核电有限公司 | Full-automatic calibration circuit, device and method for pressure transmitter |
| CN111855078A (en) * | 2020-07-28 | 2020-10-30 | 中国电子科技集团公司第四十八研究所 | Automatic zero point adjusting circuit and method for bridge force measuring sensor |
| CN113984251B (en) * | 2021-10-26 | 2023-09-22 | 西安微电子技术研究所 | Debugging method of silicon piezoresistive pressure sensor |
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| CN87216730U (en) * | 1987-12-25 | 1988-09-21 | 沈阳市皮鞋一厂 | Soft pigskin light shoes |
| US7950286B2 (en) * | 2008-12-19 | 2011-05-31 | Honeywell International Inc. | Multi-range pressure sensor apparatus and method utilizing a single sense die and multiple signal paths |
| CN101476930A (en) * | 2009-01-16 | 2009-07-08 | 上海第二工业大学 | Special batching electronic scale for iron alloy electric furnace |
| US7997143B2 (en) * | 2009-04-09 | 2011-08-16 | Kulite Semiconductor Products, Inc. | Internally switched multiple range transducer |
| CN202974519U (en) * | 2012-11-30 | 2013-06-05 | 西安交大京盛科技发展有限公司 | Temperature compensation control system used for pressure sensor |
| CN103308240B (en) * | 2013-05-22 | 2015-06-10 | 德讯科技股份有限公司 | High-precision digital air pressure measuring circuit based on industrial 485 bus |
| CN103808454B (en) * | 2014-02-27 | 2015-08-05 | 北京航空航天大学 | A kind of autonomous calibration steps of pressure transducer |
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