CN203572583U - Temperature transforming circuit and temperature transformer - Google Patents
Temperature transforming circuit and temperature transformer Download PDFInfo
- Publication number
- CN203572583U CN203572583U CN201320582468.7U CN201320582468U CN203572583U CN 203572583 U CN203572583 U CN 203572583U CN 201320582468 U CN201320582468 U CN 201320582468U CN 203572583 U CN203572583 U CN 203572583U
- Authority
- CN
- China
- Prior art keywords
- resistance
- module
- voltage
- temperature
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The utility model belongs to the technical field of sensing technologies, and especially relates to a temperature transforming circuit and a temperature transformer. The temperature transformer employs the transforming circuit which comprises a first power supply module, a voltage stabilizing module, a full range adjustment and zero adjustment module, and a linear adjustment module. The voltage stabilizing module is used for stabilizing the voltage of a first terminal of the a sensor, and for providing a reference voltage for one input terminal of the linear adjustment module, the other input terminal of the linear adjustment module is used for detecting the voltage of a second terminal of the sensor, for carrying out amplification for a signal according to the reference voltage and feeding a current signal back to the first terminal of the sensor, so as to adjust the current in a detection loop, and for outputting a current temperature signal containing a temperature signal, so that a small signal outputted by the sensor is converted into a current signal which is in a linear conversion relationship with the temperature. The temperature transforming circuit is also provided with the full range adjustment and zero adjustment module, which allows a user to adjust an accuracy of the temperature transforming circuit further. The temperature transforming circuit has advantages of being simple in structure and being low in production cost.
Description
Technical field
The utility model belongs to field of sensing technologies, particularly a kind of temperature transmission circuit and temperature transmitter.
Background technology
Temperature transmitter is temperature variable to be converted to the instrument of transmissible normalization output signal, is mainly used in measurement and the control of industrial process temperature parameter.Its general thermopair, thermal resistance of adopting is as temperature element; from temperature element output signal, deliver to transmitter module; after the processing of circuit such as voltage regulation filtering, operation amplifier, gamma correction, V/I conversion, constant current and reverse protection, convert 0mA～10mA or the output of 4～20mA standardization DC signal with temperature line relationship to.
Temperature transmitter can be divided into Two-Wire Temperature Transducer and four-wire system temperature transmitter by the power supply mode of connection.Two-Wire Temperature Transducer refers to from temperature element to temperature transmitter, to only have two lines, and these two lines had both served as power lead, served as again signal wire.At present, Two-Wire Temperature Transducer is mainly comprised of amplifying unit, linearizer, voltage/current conversion unit, self-correcting unit and voltage-adjusting unit.
Yet existing Two-Wire Temperature Transducer, in order to adopt comparatively loose connection, makes its complex structure.And loosely connected temperature send device need to take more large-area pcb board, cause the production cost of temperature transmitter higher.
Therefore, existing Two-Wire Temperature Transducer complex structure, problem that production cost is higher.
Utility model content
The purpose of this utility model is to provide a kind of temperature transmission circuit, is intended to solve existing Two-Wire Temperature Transducer complex structure, problem that production cost is higher.
A temperature transmission circuit, is connected with sensor, comprises access external power source and exports galvanic the first power supply, and described temperature transmission circuit also comprises:
The first end of sensor and the output terminal of described the first power module described in steady press bond, do voltage stabilizing to described direct current and process and generate the first reference voltage signal, and the Voltage stabilizing module of bias voltage is provided for the first end of described sensor simultaneously;
Input end connects the first end of described Voltage stabilizing module, reference voltage end connects the adjustable side of described the first power module, there is the first output terminal and the second output terminal, the tune of exporting respectively the second reference voltage signal and voltage adjustment signal by described the first output terminal and described the second output terminal according to described the first reference voltage signal and the parameter preset module that completely returns to zero;
Power end access external power source, first input end connects completely return to zero the first output terminal of module of described tune, the second input end connects the second end of described sensor, voltage adjustment end connects completely return to zero the second output terminal of module of described tune, reference power source end connects the adjustable side of described the first power module, feedback end connects completely the return to zero input end of module of described tune, current signal output end connects the earth terminal of described Voltage stabilizing module, receive the temperature signal of described sensor output, and temperature signal is amplified to the first end that generates current feedback signal and feed back to described sensor according to described the second reference voltage signal and described voltage adjustment signal, the linear adjusting module of while output current temperature signal.
Another object of the present utility model is also to provide a kind of temperature transmitter that comprises said temperature transmission circuit.
The utility model adopts and comprises the first power module, Voltage stabilizing module, adjust the temperature transmission circuit of completely return to zero module and linear adjusting module, by the first power module, provide working current and reference voltage for each module, by the voltage of Voltage stabilizing module stability sensor first end and for one of them input end of linear adjusting module, provide reference voltage, the voltage of another input end detecting sensor the second end of linear adjusting module, according to reference voltage, signal is amplified and feedback current signal to the first end of sensor, and then adjustment detects the electric current in loop, the current temperature signal of the temperature signal that output packet is exported containing sensor simultaneously, thereby realized, the tiny signal of sensor output is converted into the current signal with the linear transformation relation of temperature.In this circuit, be also provided with the tune module that completely returns to zero, user can be for further adjustments to the precision of temperature transmission circuit.Whole temperature transmission circuit has simple in structure, the advantage that production cost is low.
Accompanying drawing explanation
Fig. 1 is the modular structure figure of the temperature transmission circuit that provides of the utility model embodiment 1,2;
Fig. 2 is the exemplary circuit structural drawing of the temperature transmission circuit that provides of the utility model embodiment 1,2 and 3.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 is the modular structure of the temperature transmission circuit that provides of the utility model embodiment 1, for convenience of explanation, only shows the part relevant to the utility model, and details are as follows:
Temperature transmission circuit provided by the utility model is connected with sensor, comprises access external power source and exports galvanic the first power supply, also comprises:
The first end of voltage stabilizing end connecting sensor and the output terminal of the first power module 100, do voltage stabilizing to direct current and process and generate the first reference voltage signal, and the Voltage stabilizing module 200 of bias voltage is provided for sensor simultaneously.
Input end end connects the first end of Voltage stabilizing module 200, reference voltage end connects the reference edge of the first power module 100, there is the first output terminal and the second output terminal, the tune of exporting respectively the second reference voltage signal and voltage adjustment signal by the first output terminal and the second output terminal according to the first reference voltage signal and the parameter preset module 300 that completely returns to zero.
Power end access external power source, first input end connects the first output terminal of adjusting the module 300 that completely returns to zero, the second end of the second sensor input connection, voltage adjustment end connects the second output terminal of adjusting the module 300 that completely returns to zero, reference power source end connects the adjustable side of the first power module 100, feedback end connects the input end of adjusting the module 300 that completely returns to zero, current signal output end connects the earth terminal of Voltage stabilizing module 200, the temperature signal of receiving sensor output, and temperature signal is amplified to the first end that generates current feedback signal and feed back to sensor according to the second reference voltage signal and voltage adjustment signal, the linear adjusting module 400 of while output current temperature signal.
In the utility model embodiment, temperature signal is voltage signal, and current feedback signal is entered and detected loop by sensor first end, and the circuit that detects loop is changed.Parameter preset, for adjusting the resistance of the module 300 inner adjustable resistances that completely return to zero, also has the bias voltage of the first power module adjustable side.
In the utility model embodiment, by the voltage of Voltage stabilizing module 200 stability sensor first ends and for one of them input end of linear adjusting module 400, provide reference voltage, the voltage of another input end detecting sensor the second end of linear adjusting module 400, according to reference voltage, signal is amplified and feedback current signal to the first end of sensor, and then adjustment detects the electric current in loop, the current temperature signal of the temperature signal that output packet is exported containing sensor simultaneously, thereby realized, the tiny signal of sensor output is converted into the current signal with the linear transformation relation of temperature.
In the utility model embodiment, as shown in Figure 2, the first power module 100 can comprise:
The reference edge ADJ of the first end of resistance R 1 and three terminal regulator U1 connects the adjustable side that forms the first power module 100 altogether, the second end of resistance R 1 and the first end of resistance R 2 are connected to the output terminal VOUT of three terminal regulator U1 altogether, the input end VIN of three terminal regulator U1 is the power end of the first power module 100, and the second end of resistance R 2 is output terminals of the first power module 100.
In the utility model embodiment, three terminal regulator U1 can be that model is the three terminal regulator of LM317.
In the utility model embodiment, as shown in Figure 2, Voltage stabilizing module 200 can comprise capacitor C 2 and stabilivolt U3;
The negative electrode of the reference edge of the first end of capacitor C 2, stabilivolt U3 and stabilivolt U3 connects the voltage stabilizing end that forms Voltage stabilizing module 200 altogether, and the second end of capacitor C 2 and the anode of stabilivolt U3 connect the earth terminal that forms Voltage stabilizing module 200 altogether.
In the utility model embodiment, stabilivolt U3 can be that model is the three-terminal voltage-stabilizing pipe of TL431.
In the utility model embodiment, as shown in Figure 2, adjust the module 300 that completely returns to zero to comprise:
Resistance R 4, resistance R 5, resistance R 6, resistance R 7, the first adjustable resistance RP1 and the second adjustable resistance RP2;
The first end of resistance R 6 is input ends of adjusting the module 300 that completely returns to zero, the second end of resistance R 6 and the first end of resistance R 5 are connected to the first end of resistance R 7 altogether, the second end of resistance R 5 connects the first end of the first adjustable resistance RP1, the first end of the second end contact resistance R4 of the first adjustable resistance RP1, the adjustable side of the first adjustable resistance RP1 is the first output terminal of adjusting the module 300 that completely returns to zero, the second end of resistance R 4 is reference voltage end of adjusting the module 300 that completely returns to zero, the second end of resistance R 7 and the first end of the second adjustable resistance RP2 are connected to the adjustable side of the second adjustable resistance RP2 altogether, the second end of the second adjustable resistance RP2 is the second output terminal of adjusting the module 300 that completely returns to zero.
In the utility model embodiment, as shown in Figure 2, linear adjusting module 400 can comprise:
Resistance R 3, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, capacitor C 3, capacitor C 4, operational amplifier A 1 and NPN triode U2;
The first end of resistance R 3 is power ends of linear adjusting module 400, the second end of resistance R 3 connects the collector of NPN triode U2, the emitter of NPN triode U2, the first end of the first end of resistance R 12 and resistance R 11 connects the voltage adjustment end that forms linear adjusting module 400 altogether, the second end of resistance R 12 is feedback ends of linear adjusting module 400, the first end of resistance R 9, the second end of the first end of resistance R 10 and resistance R 11 connects the second input end that forms linear adjusting module 400 altogether, the second end of resistance R 9 and the first end of capacitor C 4 are connected to the in-phase end of operational amplifier A 1 altogether, the second end of capacitor C 4 and the first end of resistance R 8 are connected to the end of oppisite phase of operational amplifier A 1 altogether, the second end of resistance R 8 is first input ends of linear adjusting module 400, the first end of the power end of operational amplifier A 1 and capacitor C 3 connects the reference power source end that forms linear adjusting module 400 altogether, the second end of the earth terminal of operational amplifier A 1 and capacitor C 3 is connected to the current output terminal of the linear adjusting module 400 of landform altogether, the output terminal of operational amplifier A 1 connects the base stage of NPN triode U2.
In the utility model embodiment, operational amplifier A 1 can be that model is the operational amplifier of OP07.
Embodiment 2
The enforcement of the present embodiment is based upon on the basis of embodiment 1.
Temperature transmission circuit also comprises access external power source and exports positive direct-current electricity and negative galvanic second source module 500; With
Positive power source terminal and negative power end are connected respectively positive output end and the negative output terminal of second source module 500, input end connects the current signal output end of linear adjusting module 400, there is voltage signal output end, utilize described positive direct-current electricity and described negative direct current work, and according to current temperature signal the current/voltage modular converter 600 by voltage signal output end output voltage temperature signal.
In the utility model embodiment, owing to having set up the accurate die change piece of current/voltage, make temperature transmission circuit there are two kinds of mode signal outputs, can meet different demands.
In the utility model embodiment, as shown in Figure 2, second source module 500 can comprise:
Three terminal regulator U4, negative supply chip U5, capacitor C 5, capacitor C 6, capacitor C 7, capacitor C 8, capacitor C 9, inductance L 1 and diode D2;
The input end VIN of three terminal regulator U4, the positive pole of capacitor C 6, the input end VIN of negative supply chip U5 and the positive pole of capacitor C 5 connect the power end that forms second source module 500 altogether, the negative pole of capacitor C 6, the negative pole of capacitor C 5, the earth terminal GND of three terminal regulator U5, the first end of capacitor C 7, the negative pole of capacitor C 8, the positive pole of capacitor C 9, the feedback end FB of the first end of inductance L 1 and negative supply chip U5 is connected to ground altogether, the second end of capacitor C 7, the output terminal VOUT of the positive pole of capacitor C 8 and three terminal regulator U5 connects the positive output end that forms second source module 500 altogether, the negative pole of capacitor C 9, the earth terminal GND of the anode of diode D2 and negative supply chip U4 connects the negative output terminal that forms second source module 500 altogether, the second end of the negative electrode of diode D2 and inductance L 1 is connected to the output terminal VOUT of negative supply chip U4 altogether.
In the utility model embodiment, as shown in Figure 2, current/voltage modular converter 600 can comprise:
Resistance R 13, capacitor C 10 and current/voltage conversion chip A2;
The first end of resistance R 13 is input ends of current/voltage modular converter 600, the second end of resistance R 13 connects the input end IN of current/voltage conversion chip A2, the negative power end V-of the negative pole of capacitor C 10 and current/voltage conversion chip A2 connects the negative power end that forms current/voltage modular converter 600 altogether, the plus earth of capacitor C 10, the positive power source terminal V+ of current/voltage conversion chip A2 is the positive power source terminal of current/voltage modular converter 600, and the output terminal OUT of current/voltage conversion chip A2 is the voltage signal output end of current/voltage modular converter 600.
Further, current/voltage conversion chip A2 can be that model is the current/voltage conversion chip of RCV420.
Embodiment 3
The enforcement of the present embodiment is based upon on the basis of embodiment 1.
In the utility model embodiment, as shown in Figure 2, temperature transmission circuit also comprises and is serially connected with the power end of the first power module 100 and the diode D1 of external power source, the anode access external power source of diode D1, and negative electrode connects the power end of the first power module 100.Temperature transmission circuit also comprises that first end is connected with the power end of the first power module 100, and the second end connects the capacitor C 1 of the current output terminal of linear adjusting module 400.
In the utility model embodiment, diode D1 and capacitor C 1 mainly play the effect of holding circuit and filter out power ripple.
The principle of work of temperature transmission circuit the utility model embodiment 1 to 3 being provided below in conjunction with Fig. 1 and Fig. 2 is described further:
The first power module 100, according to the electric current of the resistance output relevant voltage of resistance R 1, outputs to the first end of sensor after resistance R 2.Stabilivolt U3 is further limited to 2.5V to the voltage of this electric current.Due to the further restriction of stabilivolt, make the first end RT1 voltage constant of sensor, and then be reflected in its second end RT2 after the pressure drop conversion of sensor because of temperature inversion generation.Adjust the module 300 that completely returns to zero according to this reference voltage and the first default adjustable resistance RP1, the resistance of the second adjustable resistance RP2, by resistance R 8, to the end of oppisite phase of operational amplifier A 1, export another reference voltage signal respectively, and to the emitter output voltage of NPN triode U2, adjust signal by RP2, make the emitter voltage of NPN triode U2 constant adjustable.The in-phase end of operational amplifier A 1 is by the temperature signal of resistance R 9 receiving sensor the second ends.Operational amplifier A 1 is exported corresponding current signal driving N PN triode U2 according to the reference voltage signal and the temperature signal that receive, thereby NPN triode U2 output feedback current, to detecting in loop, changes the electric current in whole temperature transmission circuit loop.User just can obtain as long as detect the electric current of the current signal output end VO1 of linear adjusting module 400 the current temperature signal that comprises temperature signal.
Embodiment 4
Another object of the present utility model is also to provide a kind of temperature transmitter, and this temperature transmitter comprises the temperature transmission circuit of embodiment 1 or 2.
Further, this temperature transmitter can comprise 8 said temperature transmission circuits, and each temperature transmission circuit accesses identical external power source.
In the utility model embodiment, each temperature transmission circuit can share same external power source, thereby is gathered together.Owing to comprising 8 said temperature transmission circuits, make this temperature transmitter can process eight road temperature signals simultaneously.
In the utility model embodiment, adopt general copper conductor connecting sensor to replace expensive compensating wire, can significantly reduce the input cost of system.Meanwhile, also can adopt silicon rubber or epoxy sealing temperature transmitter, form a sealant.Make temperature transmitter can be at antidetonation, moisture-proof, be adapted at installing and using under severe site environment.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a temperature transmission circuit, is connected with sensor, comprises access external power source and exports galvanic the first power supply, and it is characterized in that, described temperature transmission circuit also comprises:
The first end of sensor and the output terminal of described the first power module described in steady press bond, do voltage stabilizing to described direct current and process and generate the first reference voltage signal, and the Voltage stabilizing module of bias voltage is provided for the first end of described sensor simultaneously;
Input end connects the first end of described Voltage stabilizing module, reference voltage end connects the adjustable side of described the first power module, there is the first output terminal and the second output terminal, the tune of exporting respectively the second reference voltage signal and voltage adjustment signal by described the first output terminal and described the second output terminal according to described the first reference voltage signal and the parameter preset module that completely returns to zero;
Power end access external power source, first input end connects completely return to zero the first output terminal of module of described tune, the second input end connects the second end of described sensor, voltage adjustment end connects completely return to zero the second output terminal of module of described tune, reference power source end connects the adjustable side of described the first power module, feedback end connects completely the return to zero input end of module of described tune, current signal output end connects the earth terminal of described Voltage stabilizing module, receive the temperature signal of described sensor output, and described temperature signal is amplified to the first end that generates current feedback signal and feed back to described sensor according to described the second reference voltage signal and described voltage adjustment signal, the linear adjusting module of while output current temperature signal.
2. temperature transmission circuit as claimed in claim 1, is characterized in that, described temperature transmission circuit also comprises access external power source and exports positive direct-current electricity and negative galvanic second source module; With
Positive power source terminal and negative power end are connected respectively positive output end and the negative output terminal of described second source module, input end connects the current signal output end of described linear adjusting module, there is voltage signal output end, utilize described positive direct-current electricity and described negative direct current work, and according to described current temperature signal the current/voltage modular converter by described voltage signal output end output voltage temperature signal.
3. temperature transmission circuit as claimed in claim 1, is characterized in that, the described tune module that completely returns to zero comprises:
Resistance R 4, resistance R 5, resistance R 6, resistance R 7, the first adjustable resistance and the second adjustable resistance;
The first end of described resistance R 6 is completely return to zero input ends of module of described tune, the second end of described resistance R 6 and the first end of described resistance R 5 are connected to the first end of described resistance R 7 altogether, the second end of described resistance R 5 connects the first end of described the first adjustable resistance, the second end of described the first adjustable resistance connects the first end of described resistance R 4, the adjustable side of described the first adjustable resistance is completely return to zero the first output terminal of module of described tune, the second end of described resistance R 4 is completely return to zero reference voltage end of module of described tune, the second end of described resistance R 7 and the first end of described the second adjustable resistance are connected to the adjustable side of described the second adjustable resistance altogether, the second end of described the second adjustable resistance is completely return to zero the second output terminal of module of described tune.
4. temperature transmission circuit as claimed in claim 1, is characterized in that, described linear adjusting module comprises:
Resistance R 3, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, capacitor C 3, capacitor C 4, operational amplifier and NPN triode;
The first end of described resistance R 3 is power ends of described linear adjusting module, the second end of described resistance R 3 connects the collector of described NPN triode, the emitter of described NPN triode, the first end of the first end of described resistance R 12 and described resistance R 11 connects the voltage adjustment end that forms described linear adjusting module altogether, the second end of described resistance R 12 is feedback ends of described linear adjusting module, the first end of described resistance R 9, the second end of the first end of described resistance R 10 and described resistance R 11 connects the second input end that forms described linear adjusting module altogether, the second end of described resistance R 9 and the first end of capacitor C 4 are connected to the in-phase end of described operational amplifier altogether, the second end of described capacitor C 4 and the first end of described resistance R 8 are connected to the end of oppisite phase of described operational amplifier altogether, the second end of described resistance R 8 is first input ends of described linear adjusting module, the first end of the power end of described operational amplifier and described capacitor C 3 connects the reference power source end that forms described linear adjusting module altogether, the second end of the earth terminal of described operational amplifier and described capacitor C 3 is connected to the current output terminal that forms described linear adjusting module altogether, the output terminal of described operational amplifier connects the base stage of described NPN triode.
5. temperature transmission circuit as claimed in claim 1, is characterized in that, described Voltage stabilizing module comprises capacitor C 2 and stabilivolt U3;
The negative electrode of the reference edge of the first end of described capacitor C 2, described stabilivolt U3 and described stabilivolt U3 connects the voltage stabilizing end that forms described Voltage stabilizing module altogether, and the second end of described capacitor C 2 and the anode of described stabilivolt U3 connect the earth terminal that forms described Voltage stabilizing module altogether.
6. temperature transmission circuit as claimed in claim 2, is characterized in that, described current/voltage modular converter comprises:
Resistance R 13, capacitor C 10 and current/voltage conversion chip;
The first end of described resistance R 13 is input ends of described current/voltage modular converter, the second end of described resistance R 13 connects the input end of described current/voltage conversion chip, the negative power end of the negative pole of described capacitor C 10 and described current/voltage conversion chip connects the negative power end that forms described current/voltage modular converter altogether, the plus earth of described capacitor C 10, the positive power source terminal of described current/voltage conversion chip is the positive power source terminal of described current/voltage modular converter, and the output terminal of described current/voltage conversion chip is the voltage signal output end of described current/voltage modular converter.
7. a temperature transmitter, is characterized in that, described temperature transmitter comprises the temperature transmission circuit as described in claim 1 to 6 any one.
8. temperature transmitter as claimed in claim 7, is characterized in that, described temperature transmitter comprises 8 described temperature transmission circuits.
9. temperature transmitter as claimed in claim 7, is characterized in that, described temperature transmission circuit adopts copper conductor to connect described sensor.
10. temperature transmitter as claimed in claim 7, is characterized in that, described temperature transmitter is coated with sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320582468.7U CN203572583U (en) | 2013-09-18 | 2013-09-18 | Temperature transforming circuit and temperature transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320582468.7U CN203572583U (en) | 2013-09-18 | 2013-09-18 | Temperature transforming circuit and temperature transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203572583U true CN203572583U (en) | 2014-04-30 |
Family
ID=50540310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320582468.7U Expired - Lifetime CN203572583U (en) | 2013-09-18 | 2013-09-18 | Temperature transforming circuit and temperature transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203572583U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482947A (en) * | 2014-12-26 | 2015-04-01 | 镇江中煤电子有限公司 | Mining multi-mode sensor signal transmission circuit |
| CN105739562A (en) * | 2016-01-19 | 2016-07-06 | 湖南汽车工程职业学院 | Thermostatic control circuit |
| CN107305146A (en) * | 2016-04-19 | 2017-10-31 | Ls 产电株式会社 | Parameter determination device for the temperature of the switch element of estimating inverter |
| CN108151771A (en) * | 2017-12-20 | 2018-06-12 | 哈尔滨广瀚燃气轮机有限公司 | A kind of gas turbine throttle position transmitter |
| CN108956005A (en) * | 2018-08-08 | 2018-12-07 | 陈德连 | pressure sensor |
| CN109163819A (en) * | 2018-10-15 | 2019-01-08 | 西安爱生技术集团公司 | One kind having linear high-precision unmanned vehicle engine cylinder temperature thermometer |
| CN109520635A (en) * | 2018-11-09 | 2019-03-26 | 天津航空机电有限公司 | A kind of platinum resistance nonlinear compensation and signal processing circuit |
-
2013
- 2013-09-18 CN CN201320582468.7U patent/CN203572583U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482947A (en) * | 2014-12-26 | 2015-04-01 | 镇江中煤电子有限公司 | Mining multi-mode sensor signal transmission circuit |
| CN105739562A (en) * | 2016-01-19 | 2016-07-06 | 湖南汽车工程职业学院 | Thermostatic control circuit |
| CN105739562B (en) * | 2016-01-19 | 2018-02-06 | 湖南汽车工程职业学院 | A kind of constant temperature control circuit |
| CN107305146A (en) * | 2016-04-19 | 2017-10-31 | Ls 产电株式会社 | Parameter determination device for the temperature of the switch element of estimating inverter |
| CN108151771A (en) * | 2017-12-20 | 2018-06-12 | 哈尔滨广瀚燃气轮机有限公司 | A kind of gas turbine throttle position transmitter |
| CN108956005A (en) * | 2018-08-08 | 2018-12-07 | 陈德连 | pressure sensor |
| CN108956005B (en) * | 2018-08-08 | 2024-03-22 | 陈德连 | Pressure sensor |
| CN109163819A (en) * | 2018-10-15 | 2019-01-08 | 西安爱生技术集团公司 | One kind having linear high-precision unmanned vehicle engine cylinder temperature thermometer |
| CN109520635A (en) * | 2018-11-09 | 2019-03-26 | 天津航空机电有限公司 | A kind of platinum resistance nonlinear compensation and signal processing circuit |
| CN109520635B (en) * | 2018-11-09 | 2020-06-09 | 天津航空机电有限公司 | Platinum resistor nonlinear compensation and signal processing circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203572583U (en) | Temperature transforming circuit and temperature transformer | |
| JP5673750B2 (en) | Current output circuit, and broadband two-wire transmitter having the same circuit | |
| CN102122920B (en) | Adaptive distributed type optical fiber temperature-measuring laser detection amplifier | |
| CN202511939U (en) | Signal conditioning circuit of 0-5V output pressure sensor | |
| CN207851026U (en) | Systematic gas monitoring system | |
| CN101873063B (en) | Frequency voltage switching circuit and multi-gear frequency voltage switching method | |
| CN103528492A (en) | Signal converter of high-measurement-range submicron-level high-precision LVDT (linear variable differential transformer) displacement sensor | |
| CN101788830B (en) | Digital temperature control circuit | |
| CN203629707U (en) | Multifunctional programmable temperature measurement device | |
| CN202092805U (en) | Signal acquisition circuit of force sensor | |
| CN102386765A (en) | Power supply circuit | |
| CN201828595U (en) | DC voltage signal isolating amplifier circuit | |
| CN109510457B (en) | Output voltage adjustable power supply circuit and gas data acquisition equipment | |
| CN203216959U (en) | Floating digital display meter power supply structure | |
| CN113447049B (en) | Alternating current signal transmitter | |
| CN210572474U (en) | Two-wire Hall type effective value current transmitter | |
| CN110542788A (en) | composite current frequency sensor | |
| CN202141536U (en) | Temperature transmitter | |
| CN109030901A (en) | A kind of built-in voltage electric current one transmitter | |
| CN201732110U (en) | Multimeter | |
| CN210513401U (en) | Vibration transmitter based on MEMS sensor | |
| CN211317573U (en) | Temperature data acquisition circuit with isolation function | |
| CN203549065U (en) | Isolated digital type electric actuator controller | |
| CN103308240B (en) | High-precision digital air pressure measuring circuit based on industrial 485 bus | |
| CN202406086U (en) | Motor rotation speed obtaining circuit and frequency converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |