CN206378225U - Pressure transmitter and pressure inverting system - Google Patents
Pressure transmitter and pressure inverting system Download PDFInfo
- Publication number
- CN206378225U CN206378225U CN201621427387.XU CN201621427387U CN206378225U CN 206378225 U CN206378225 U CN 206378225U CN 201621427387 U CN201621427387 U CN 201621427387U CN 206378225 U CN206378225 U CN 206378225U
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- max1452
- pressure transmitter
- pressure
- chips
- pliotron
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Abstract
The utility model discloses a kind of pressure transmitter and pressure inverting system, the pressure transmitter includes Wheatstone bridge, MAX1452 chips, sampling resistor, pliotron and communicating circuit；The output end of the Wheatstone bridge is electrically connected with the differential signal input of the MAX1452 chips, the MAX1452 chips are used to provide driving source for the Wheatstone bridge, the analog output of the MAX1452 chips is electrically connected by universal amplifier with the base stage of the pliotron, the two ends of the sampling resistor are electrically connected with the direction input of the universal amplifier and the emitter stage of the pliotron respectively, and the communicating circuit is used to send the debugging signal received to the colelctor electrode of the pliotron.Compared with prior art, pressure transmitter of the present utility model can complete pressure sensor linear gauging and the temperature-compensating of automation, improve the stability and production efficiency of system.
Description
Technical field
The utility model is related to pressure transmitter field, more particularly to a kind of pressure transmitter based on MAX1452 chips
And pressure inverting system.
Background technology
The silicon pressure sensor being made based on semiconductor pressure resistance effect, ability will be contacted in measurement process with testee
Measurement result.Because the temperature change of testee makes the piezoresistance coefficient of sensor produce change, so the principle of piezoresistive effect
The temperature drift that sensor itself can be caused to export.Simultaneously as sensor bridge resistance caused by manufacturing process is not right
Claim, the factor such as leakage current and erection stress of arm resistance can also cause the non-linear of sensor output signal, have a strong impact on
The accuracy of sensitivity and the measurement of sensor.
Need to gather using the compensation method of traditional approach and record substantial amounts of data, exist production cycle length, cost it is high,
Cost it is high and easily by destruction the shortcomings of.
Utility model content
The technical problems to be solved in the utility model is pressed in the prior art by gathering mass data compensation to overcome
The defect that the sensitivity of force snesor and the mode of accuracy have production cycle length, cost height etc. can be realized there is provided one kind
The linear sensor calibration of automation and the pressure transmitter and pressure inverting system of temperature-compensating.
The utility model is to solve above-mentioned technical problem by following technical proposals：
A kind of pressure transmitter, its feature is, including Wheatstone bridge, MAX1452 chips, sampling resistor, power three
Pole pipe and communicating circuit；
The output end of the Wheatstone bridge is electrically connected with the differential signal input of the MAX1452 chips, described
MAX1452 chips are used to provide driving source for the Wheatstone bridge, and the analog outputs of the MAX1452 chips passes through described
The universal amplifier of MAX1452 chips is electrically connected with the base stage of the pliotron, the two ends of the sampling resistor respectively with
The emitter stage electrical connection of the direction input and the pliotron of the universal amplifier, the communicating circuit is used for will
The debugging signal received is sent to the colelctor electrode of the pliotron.
It is preferred that the Wheatstone bridge includes the silicon strain gage of pressure sensor.
It is preferred that the pressure sensor is the micro- fusion pressure force snesor of glass.
It is preferred that the driving source includes voltage drive source and current excitation source.
It is preferred that the pressure transmitter also includes power module, for for the MAX1452 chip power supplies.
It is preferred that the power module includes MIC5233 chips.
The utility model also provides a kind of pressure inverting system, and its feature is, including upper debug circuit and as above
Described pressure transmitter, the upper debug circuit is used to send debugging signal to the communicating circuit.
On the basis of common sense in the field is met, above-mentioned each optimum condition can be combined, produce the utility model it is each compared with
Good example.
Positive effect of the present utility model is：Compared with prior art, pressure transmitter of the present utility model is adopted
With MAX1452 chips and the micro- fusion pressure force snesor of glass, and using sampling resistor and receive the pole of power three of outside debugging signal
Pipe constitutes controllable constant-current source, completes the linear sensor calibration and temperature-compensating of automation, improves the stabilization of system
Property and production efficiency, reduce production cost, while so that simple production process, operating process is convenient.
Brief description of the drawings
Fig. 1 is the structured flowchart of the pressure transmitter of the utility model embodiment.
Fig. 2 is the circuit structure diagram of the Wheatstone bridge of the utility model embodiment.
Embodiment
The utility model is further illustrated below by the mode of embodiment, but is not therefore limited in the utility model
Among described scope of embodiments.
The present embodiment provides a kind of pressure transmitter, as shown in figure 1, including Wheatstone bridge, MAX1452 chips, power supply
Module, sampling resistor, pliotron and communicating circuit.
Wherein, MAX1452 chips are a highly integrated analog sensor signal processors, available for optimization industry and
The sensor of resistance element is used in process control, with amplification, calibration and temperature compensation function, its working characteristics can be approached
Sensor intrinsic repeatable index.Its full analog signal channel is in the output signal without introducing quantizing noise, and utilize collection
Into 16 digit weighted-voltage D/A converters (DAC) realize digitlization correction.The offset and span of signal are calibrated with 16 DAC, assigned
Product sensor real interchangeability.As shown in figure 1, MAX1452 chip internals may be programmed comprising bridge excitation module, 16 grades
Gain amplifier (PGA), 768 bytes (6144) inside, EEPROM, four 16 DAC, a universal amplifier and inside
Thermal module.In addition to offset and span compensation, MAX1452 chips also utilize offset temperatures coefficient (TC) and span temperature coefficient
(FSOTC) unique temperature-compensating is provided.
Pressure sensor in the present embodiment uses the micro- fusion pressure force snesor of novel glass, specifically, using novel glass
Micro- molten technology, strains the back side that juice is sintered in cavity, cavity is by 17-4PH by high temp glass powder by 17-4PH mild steel by silicon
Stainless steel entirety car comes out, and adapts to high pressure overload, can effectively resist instantaneous pressure impact.Without oil-filled, non-isolating film piece, it can survey
Fluid media (medium) with a small amount of impurity；Stainless steel overall structure, without " O " type sealing ring, absolutely not leaks hidden danger.High-pressure type can be surveyed
600MPa (6000bar), the high-precision degree type of product can accomplish 0.075%.
Silicon strain gage is directly bonded in the surface of elastomer, is drawn silicon strain gage by compensating plate, the group on compensating plate
Into Wheatstone bridge.Wherein, the circuit structure of Wheatstone bridge is as shown in Fig. 2 resistance R represents the micro- molten pressure sensing of above-mentioned glass
Silicon strain gage in device.The output end vo ut of the Wheatstone bridge and the MAX1452 chips differential signal input electricity
Connection, the MAX1452 chips are used to provide the voltage drive source and current excitation source required for it for the Wheatstone bridge,
The power module passes through described for the analog output for the MAX1452 chip power supplies, the MAX1452 chips
The universal amplifier of MAX1452 chips is electrically connected with the base stage of the pliotron, and the communicating circuit is used to receive
Debugging signal send to the colelctor electrode of the pliotron, one end of the sampling resistor and the side of the universal amplifier
Electrically connected to input, the other end is electrically connected with the emitter stage of the pliotron constitutes controllable constant-current source, to produce 4~
20mA curent change.
MAX1452 chips are needed in 5V supply voltage, the present embodiment, and power module includes low voltage difference and is depressured chip
MIC5233 chips, for the 24V voltages of outside input to be changed into 5V voltages.
The operation principle of the present embodiment pressure transmitter is as follows：When pressure deforms upon elastomer, elasticity is bonded in
Silicon strain gage on body is also deformed upon, that is, generates silicon piezoresistive effect so that the balance of Wheatstone bridge receives destruction, production
The voltage output for being proportional to pressure has been given birth to, the voltage of Wheatstone bridge output, and connecting inner are gathered MAX1452 chip high speeds
Temperature carry out data processing, to export the pressure value of corresponding temperature, this value pass through DA export analog signal, control Constant Electric Current
Road is converted to the industrial signal output of 4~20mA mock standards.
The pressure transmitter of the present embodiment has the features such as frequency response is high, operating temperature is wide, it is ensured that sensor is disliked in industry
The long-time stability used in bad environment.If temperature change is divided into by the intelligent digital temperature-compensation circuit of MAX1452 chips
Dry minizone, the zero-bit and offset of each minizone are respectively written in compensation circuit, and in use, these values are write
Enter in the analog output path being affected by temperature, each temperature spot is the transmitter " calibration temperature ".Sensor number
Word circuit is well-designed for radio frequency, electromagnetic interference, the progress of the operating mode of surge voltage, with strong antijamming capability, supply district
The features such as width, polarity protection.
The present embodiment also provides a kind of pressure inverting system, including upper debug circuit and above-mentioned pressure transmitter,
The upper debug circuit is used to send debugging signal to the communicating circuit.Wherein, communicating circuit is received after debugging signal
The colelctor electrode of pliotron is sent it to, the current signal that pressure transmitter is exported is adjusted to 4~20mA.
Although the foregoing describing embodiment of the present utility model, it will be appreciated by those of skill in the art that
These are merely illustrative of, and protection domain of the present utility model is defined by the appended claims.Those skilled in the art
Member can make numerous variations or repair to these embodiments on the premise of without departing substantially from principle of the present utility model and essence
Change, but these changes and modification each fall within protection domain of the present utility model.
Claims (7)
1. a kind of pressure transmitter, it is characterised in that including Wheatstone bridge, MAX1452 chips, sampling resistor, the pole of power three
Pipe and communicating circuit；
The output end of the Wheatstone bridge is electrically connected with the differential signal input of the MAX1452 chips, the MAX1452
Chip is used to provide driving source for the Wheatstone bridge, and the analog output of the MAX1452 chips passes through the MAX1452
The universal amplifier of chip is electrically connected with the base stage of the pliotron, the two ends of the sampling resistor respectively with it is described general
The emitter stage electrical connection of the direction input of amplifier and the pliotron, the communicating circuit is used to receive
Debugging signal is sent to the colelctor electrode of the pliotron.
2. pressure transmitter as claimed in claim 1, it is characterised in that the Wheatstone bridge includes the silicon of pressure sensor
Strain gauge.
3. pressure transmitter as claimed in claim 2, it is characterised in that the pressure sensor is the micro- molten pressure sensing of glass
Device.
4. pressure transmitter as claimed in claim 1, it is characterised in that the driving source includes voltage drive source and electric current swashs
Encourage source.
5. pressure transmitter as claimed in claim 1, it is characterised in that the pressure transmitter also includes power module, is used
In for the MAX1452 chip power supplies.
6. pressure transmitter as claimed in claim 5, it is characterised in that the power module includes MIC5233 chips.
7. a kind of pressure inverting system, it is characterised in that including upper debug circuit and such as any one of claim 1-6 institutes
The pressure transmitter stated, the upper debug circuit is used to send debugging signal to the communicating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621427387.XU CN206378225U (en) | 2016-12-23 | 2016-12-23 | Pressure transmitter and pressure inverting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621427387.XU CN206378225U (en) | 2016-12-23 | 2016-12-23 | Pressure transmitter and pressure inverting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206378225U true CN206378225U (en) | 2017-08-04 |
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ID=59407832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621427387.XU Active CN206378225U (en) | 2016-12-23 | 2016-12-23 | Pressure transmitter and pressure inverting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240879A (en) * | 2016-12-23 | 2018-07-03 | 上海朝辉压力仪器有限公司 | Pressure transmitter and pressure inverting system |
| CN108254105A (en) * | 2018-01-05 | 2018-07-06 | 台州辉腾泵业有限公司 | Pressure detection method and its application |
-
2016
- 2016-12-23 CN CN201621427387.XU patent/CN206378225U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240879A (en) * | 2016-12-23 | 2018-07-03 | 上海朝辉压力仪器有限公司 | Pressure transmitter and pressure inverting system |
| CN108254105A (en) * | 2018-01-05 | 2018-07-06 | 台州辉腾泵业有限公司 | Pressure detection method and its application |
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