CN202057430U - Four wire system resistance thermometer detector temperature transmitter - Google Patents
Four wire system resistance thermometer detector temperature transmitter Download PDFInfo
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- CN202057430U CN202057430U CN2011201269214U CN201120126921U CN202057430U CN 202057430 U CN202057430 U CN 202057430U CN 2011201269214 U CN2011201269214 U CN 2011201269214U CN 201120126921 U CN201120126921 U CN 201120126921U CN 202057430 U CN202057430 U CN 202057430U
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Abstract
The utility model discloses a four wire system resistance thermometer detector temperature transmitter, comprising a power circuit, a resistance signal input circuit, a linearization circuit, a signal amplification circuit, a signal adjustment circuit, an isolation circuit and a signal output circuit. The four wire system resistance thermometer detector temperature transmitter employs an integrated chip CD 4069 instead of a push-pull triode with large power consumption for the control of oscillation and employs a switching circuit in a signal output circuit for reducing a maximum voltage difference of the circuit to 24V, thereby simplifying linear circuits, saving components, reducing power consumption and improving load capacity effectively. Moreover, with zero adjustment being advanced to a step following the signal amplification, the four wire system resistance thermometer detector temperature transmitter prevents the error of the following circuits from further increasing and thus improving linear accuracy greatly.
Description
Technical field
The utility model relates to a kind of temperature and becomes and send device, particularly relates to a kind of low in energy consumption, carrying load ability is strong, linear precision is high four-wire system resistance and temperature transmitter.
Background technology
At present, the lead-in wire of thermal resistance can have two-wire system, three-wire system and three kinds of connected modes of four-wire system in the resistance and temperature transmitter.Four-wire system resistance and temperature transmitter can be eliminated the resistance influence of lead-in wire fully, plays the part of more and more important role in daily life, and its application in all trades and professions is also increasingly extensive.
Four-wire system resistance and temperature transmitter in the course of the work, be that resistance signal with primary instrument (just being meant thermal resistance here) becomes PLC (Programmable Logic Controller, programmable logic controller (PLC)), 4-20mA direct current (or 1-5V direct current) signal of the required standard of DCS (Distributed Control System, dcs) system.This just requires, and it is low in energy consumption, linear precision is high, carrying load ability is strong.
But in existing four-wire system resistance and temperature transmitter, the general employing prevents that the short circuit diode prevents short circuit; Employing is recommended the triode oscillatory circuit direct current 24V is converted to square wave in feed circuit, becomes the DC voltage that needs by transformer; Signal output apparatus adopts integrated chip to follow voltage, through the sampling resistor output signal; Maximum power dissipation when the power consumption of entire circuit always remains on the output signal maximum; In addition, negative supply is arranged in the circuit, maximum reaches negative 15V, and maximum differential pressure is 39 volts.These reasons have caused the shortcoming that existing four-wire system resistance and temperature transmitter power consumption height, carrying load ability are not strong, linear precision is not high.
The utility model content
The purpose of this utility model provides a kind of low in energy consumption, carrying load ability is strong, linear precision is high four-wire system resistance and temperature transmitter.
For achieving the above object, the utility model provides a kind of four-wire system resistance and temperature transmitter, it comprises power circuit, resistance signal input circuit, linearizer, signal amplification circuit, signal adjustment circuit, buffer circuit and signal output apparatus, wherein, power circuit is linearizer, signal amplification circuit, signal adjustment circuit, buffer circuit and signal output apparatus power supply; The resistance signal input circuit links to each other with linearizer and signal is transferred to linearizer; The output terminal of linearizer links to each other with the input end of signal amplification circuit, the output terminal of signal amplification circuit links to each other with the input end of signal adjustment circuit, the output terminal that circuit is adjusted in the signal adjustment links to each other with the buffer circuit input end, the output terminal of buffer circuit links to each other with signal output apparatus, the input signal of resistance signal input circuit is exported by signal output apparatus after linearizer, signal amplification circuit, signal adjustment circuit, buffer circuit are handled.
In according to a kind of preferred implementation of the present utility model, signal output apparatus comprises output circuit 1 and output circuit 2, and the input end of output circuit 1 and output circuit 2 links to each other with the institute buffer circuit respectively, is used to receive the signal and the output of buffer circuit.
In according to another kind of preferred implementation of the present utility model, power circuit comprises triode T3, triode T4, triode T5, triode T6, integrated chip CD4069, triode T1 and transformer U4, external voltage is through triode T3, triode T4, triode T5, triode T6 current limiting pressure-limiting, through integrated chip CD4069, triode T1 and transformer U4, convert external voltage to required voltage VA+, VA-, VA0, VB+, VB-, VB0, VB1, VBe+, VBe-, VBe0, VBe1 again.
In according to another preferred implementation of the present utility model, linearizer is made up of balanced bridge and positive feedback resistor, the A output terminal of resistance signal input circuit is connected with the input port 3 of integrated transporting discharging OP-07 through resistance R 9A, the B output terminal of resistance signal input circuit is through resistance R 2A, resistance R 2B, resistance R 3A, after the resistance R 3B dividing potential drop, pass through resistance R 4A again, resistance R 4B, resistance R 4C is connected with the input port 2 of integrated transporting discharging OP-07, the output port 6 of integrated transporting discharging OP-07 links to each other with the end of resistance R 8C, through resistance R IA, resistance R 1B, resistance R 8A, resistance R 8B, resistance R 8C forms positive-feedback circuit.
In according to a kind of preferred implementation of the present utility model, signal amplification circuit is made up of integrated transporting discharging OP-07 and resistance R 4A, resistance R 4B, resistance R 4C, resistance R 5A, resistance R 5B, the input port 3 of integrated transporting discharging OP-07 links to each other with resistance R 9A, the input port 2 of integrated transporting discharging OP-07 is connected with resistance R 4A, resistance R 4B, resistance R 4C, the output port 6 of integrated transporting discharging OP-07 links to each other with input port 2 by resistance R 5A, resistance R 5B, thereby realizes voltage signal is amplified.
In according to another kind of preferred implementation of the present utility model, signal adjustment circuit is made up of resistance R 5B, resistance R 6A, resistance R 6B, resistance R 7A and stabilivolt DZ4, the input end of stabilivolt DZ4 links to each other with the end of resistance R 5B, resistance R 6B, the output terminal of stabilivolt DZ4 links to each other with R6A, resistance R 7A, be used for when difference appears in signal and standard signal, adjust, make it consistent with standard signal.
In according to another preferred implementation of the present utility model, signal isolation circuit comprises integrated transporting discharging OP07, transformer U5, triode T0, resistance R 9, resistance R 10, capacitor C 5, capacitor C 6, diode D9, diode D10, diode D11, resistance R 101, resistance R 102, resistance R 201, resistance R 202, capacitor C 102, capacitor C 103, capacitor C 202, capacitor C 203, wherein, the output port 6 of integrated transporting discharging OP07 links to each other with the base stage of triode with diode D8 by resistance R 8, and the collector of triode T0 links to each other with an end of the input end of transformer U5.
In according to another preferred implementation of the present utility model, signal output apparatus 1 comprises by integrated transporting discharging OP07, resistance R 105, resistance R 106, triode T101, the follow circuit that triode T102 forms, and by integrated transporting discharging U11B, resistance R 109, resistance R 110, resistance R 111, the on-off circuit that triode T103 forms, the input port 2 of integrated transporting discharging OP07 links to each other with resistance R 106, the output port 6 of integrated transporting discharging OP07 links to each other with resistance R 105, resistance R 105 links to each other with the base stage of triode T101, the emitter of triode T101 links to each other with the base stage of triode T102, be connected with resistance R 109 between the output port 7 of integrated transporting discharging U11B and the input port 5, one end of resistance R 111 links to each other with the output port 7 of integrated transporting discharging U11B, the other end links to each other with resistance R 110, the base stage of triode T103 is connected between resistance R 110 and the resistance R 111, and the other end of the emitter of triode T103 and resistance R 110 is connected with voltage VB1 respectively.
The beneficial effect that the utlity model has: the utility model adopts integrated chip CD4069 control vibration, rather than adopt power consumption big recommend triode, adopt on-off circuit at signal output apparatus simultaneously, the maximum differential pressure of circuit is reduced to 24 volts, simplified linear circuit, reduce components and parts, can effectively reduce power consumption, improved load capacity.Simplified linear circuit, will adjust zero point advance to signal and amplify after, avoided back circuit error further to amplify, can improve linear precision.
Description of drawings
Fig. 1 is the structural representation of the utility model four-wire system resistance and temperature transmitter;
Fig. 2 is the circuit theory diagrams of the utility model power circuit;
Fig. 3 is the circuit theory diagrams of the utility model linearizer, signal amplification circuit and signal adjustment circuit;
Fig. 4 is the circuit theory diagrams of the utility model signal isolation circuit;
Fig. 5 is the circuit theory diagrams of the utility model signal output apparatus.
Embodiment
For make the purpose of this utility model, technical scheme, and advantage clearer, below the utility model is further described with reference to accompanying drawing.
As shown in Figure 1, four-wire system resistance and temperature transmitter of the present utility model comprises power circuit, resistance signal input circuit, linearizer, signal amplification circuit, signal adjustment circuit, buffer circuit and signal output apparatus.Power circuit is linearizer, signal amplification circuit, signal adjustment circuit, buffer circuit and signal output apparatus power supply.The resistance signal input circuit links to each other with linearizer and signal is transferred to linearizer, the output terminal of linearizer links to each other with the input end of signal amplification circuit, the output terminal of signal amplification circuit links to each other with the input end of signal adjustment circuit, the output terminal that circuit is adjusted in the signal adjustment links to each other with the buffer circuit input end, the output terminal of buffer circuit links to each other with signal output apparatus, the input signal of resistance signal input circuit is exported by signal output apparatus after linearizer, signal amplification circuit, signal adjustment circuit, buffer circuit are handled.Wherein, signal output apparatus can have No. one output circuit, also multiplex output circuit can be arranged, in the present embodiment, output circuit comprises structure identical output circuit 1 and output circuit, the input end of output circuit 1 and output circuit 2 links to each other with buffer circuit respectively, is used to receive the signal and the output of buffer circuit.
As shown in Figure 2, power circuit comprises triode T3, triode T4, triode T5, triode T6, integrated chip CD4069, triode T1 and transformer U4, the external voltage of 24V is through triode T3, triode T4, triode T5, triode T6 current limiting pressure-limiting, through the effect of integrated chip CD4069, triode T1 and transformer U4, convert the 24V external voltage to required voltage VA+, VA-, VA0, VB+, VB-, VB0, VB1, VBe+, VBe-, VBe0, VBe1 again.
As shown in Figure 3, linearizer is made up of balanced bridge and positive feedback resistor, as seen from the figure, the A output terminal of resistance signal input circuit is connected with the input port 3 of integrated transporting discharging OP-07 through resistance R 9A, the B output terminal of resistance signal input circuit is through resistance R 2A, resistance R 2B, resistance R 3A, after the resistance R 3B dividing potential drop, pass through resistance R 4A again, resistance R 4B, resistance R 4C is connected with the input port 2 of integrated transporting discharging OP-07, the output port 6 of integrated transporting discharging OP-07 links to each other with the end of resistance R 8C, through resistance R IA, resistance R 1B, resistance R 8A, resistance R 8B, resistance R 8C forms positive-feedback circuit.Signal amplification circuit is made up of integrated transporting discharging OP-07 and resistance R 4A, resistance R 4B, resistance R 4C, resistance R 5A, resistance R 5B, the input port 3 of integrated transporting discharging OP-07 links to each other with resistance R 9A, the input port 2 of integrated transporting discharging OP-07 is connected with resistance R 4A, resistance R 4B, resistance R 4C, the output port 6 of integrated transporting discharging OP-07 links to each other with input port 2 by resistance R 5A, resistance R 5B, thereby realizes voltage signal is amplified.Signal adjustment circuit is made up of resistance R 5B, resistance R 6A, resistance R 6B, resistance R 7A and stabilivolt DZ4, the input end of stabilivolt DZ4 links to each other with the end of resistance R 5B, resistance R 6B, the output terminal of stabilivolt DZ4 links to each other with R6A, resistance R 7A, be used for when difference appears in signal and standard signal, adjust, make it consistent with standard signal.
Fig. 4 shows the circuit theory diagrams of the utility model signal isolation circuit, and Fig. 5 shows the circuit theory diagrams of the utility model signal output apparatus.As shown in FIG., signal isolation circuit comprises integrated transporting discharging OP07, transformer U5, triode T0, resistance R 9, resistance R 10, capacitor C 5, capacitor C 6, diode D9, diode D10, diode D11, resistance R 101, resistance R 102, resistance R 201, resistance R 202, capacitor C 102, capacitor C 103, capacitor C 202, capacitor C 203, wherein, the output port 6 of integrated transporting discharging OP07 links to each other with the base stage of triode with diode D8 by resistance R 8, and the collector of triode T0 links to each other with an end of the input end of transformer U5.In the present embodiment, signal isolation circuit is isolated input signal and two-way output signal, and respectively by signal output apparatus 1 and signal output apparatus 2 outputs.Because signal output apparatus 1 is the same with signal output apparatus 2 structures, here only introduce the mechanism of signal output apparatus 1, shown among the figure 5, signal output apparatus 1 comprises the follow circuit of being made up of integrated transporting discharging OP07, resistance R 105, resistance R 106, triode T101, triode T102, and the on-off circuit of being made up of integrated transporting discharging U11B, resistance R 109, resistance R 110, resistance R 111, triode T103.The input port 2 of integrated transporting discharging OP07 links to each other with resistance R 106, the output port 6 of integrated transporting discharging OP07 links to each other with resistance R 105, resistance R 105 links to each other with the base stage of triode T101, the emitter of triode T101 links to each other with the base stage of triode T102, be connected with resistance R 109 between the output port 7 of integrated transporting discharging U11B and the input port 5, one end of resistance R 111 links to each other with the output port 7 of integrated transporting discharging U11B, the other end links to each other with resistance R 110, the base stage of triode T103 is connected between resistance R 110 and the resistance R 111, and the other end of the emitter of triode T103 and resistance R 110 is connected with voltage VB1 respectively.Signal is through after isolating, follow circuit by integrated transporting discharging OP07, resistance R 105, resistance R 106, triode T101, triode T102 composition, on-off circuit by forming by integrated transporting discharging U11B, resistance R 109, resistance R 110, resistance R 11 triode T103 again, the 4---20mA electric current of outputting standard.In the utility model, adopt integrated chip CD4069 control vibration, adopt on-off circuit at signal output apparatus simultaneously, and the maximum differential pressure of circuit is reduced to 24 volts, and simplified linear circuit thus, reduced components and parts, effectively reduce power consumption, improved load capacity.To adjust zero point advance to signal and amplify after, avoided back circuit error further to amplify, can improve linear precision.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (8)
1. four-wire system resistance and temperature transmitter, it is characterized in that: comprise power circuit, resistance signal input circuit, linearizer, signal amplification circuit, signal adjustment circuit, buffer circuit and signal output apparatus, described power circuit is described linearizer, signal amplification circuit, signal adjustment circuit, buffer circuit and signal output apparatus power supply; Described resistance signal input circuit links to each other with described linearizer and signal is transferred to described linearizer; The output terminal of described linearizer links to each other with the input end of described signal amplification circuit, the output terminal of described signal amplification circuit links to each other with the input end of described signal adjustment circuit, the output terminal that circuit is adjusted in described signal adjustment links to each other with described buffer circuit input end, the output terminal of described buffer circuit links to each other with described signal output apparatus, the input signal of described resistance signal input circuit is exported by signal output apparatus after linearizer, signal amplification circuit, signal adjustment circuit, buffer circuit are handled.
2. four-wire system resistance and temperature transmitter as claimed in claim 1, it is characterized in that: described signal output apparatus comprises output circuit 1 and output circuit 2, the input end of described output circuit 1 and output circuit 2 links to each other with described buffer circuit respectively, is used to receive the signal and the output of described buffer circuit.
3. four-wire system resistance and temperature transmitter as claimed in claim 2, it is characterized in that: described signal output apparatus 1 comprises by integrated transporting discharging OP07, resistance R 105, resistance R 106, triode T101, the follow circuit that triode T102 forms, and by integrated transporting discharging U11B, resistance R 109, resistance R 110, resistance R 111, the on-off circuit that triode T103 forms, the input port 2 of described integrated transporting discharging OP07 links to each other with resistance R 106, the output port 6 of described integrated transporting discharging OP07 links to each other with resistance R 105, described resistance R 105 links to each other with the base stage of described triode T101, the emitter of described triode T101 links to each other with the base stage of described triode T102, be connected with resistance R 109 between the output port 7 of described integrated transporting discharging U11B and the input port 5, one end of described resistance R 111 links to each other with the output port 7 of described integrated transporting discharging U11B, the other end links to each other with described resistance R 110, the base stage of described triode T103 is connected between resistance R 110 and the resistance R 111, and the other end of the emitter of triode T103 and resistance R 110 is connected with voltage VB1 respectively.
4. four-wire system resistance and temperature transmitter as claimed in claim 1, it is characterized in that: described power circuit comprises triode T3, triode T4, triode T5, triode T6, integrated chip CD4069, triode T1 and transformer U4, described external voltage is through triode T3, triode T4, triode T5, triode T6 current limiting pressure-limiting, through integrated chip CD4069, triode T1 and transformer U4, convert external voltage to required voltage VA+, VA-, VA0, VB+, VB-, VB0, VB1, VBe+, VBe-, VBe0, VBe1 again.
5. four-wire system resistance and temperature transmitter as claimed in claim 1, it is characterized in that: described linearizer is made up of balanced bridge and positive feedback resistor, the A output terminal of described resistance signal input circuit is connected with the input port 3 of integrated transporting discharging OP-07 through resistance R 9A, the B output terminal of resistance signal input circuit is through resistance R 2A, resistance R 2B, resistance R 3A, after the resistance R 3B dividing potential drop, pass through resistance R 4A again, resistance R 4B, resistance R 4C is connected with the input port 2 of integrated transporting discharging OP-07, the output port 6 of integrated transporting discharging OP-07 links to each other with the end of resistance R 8C, through resistance R IA, resistance R 1B, resistance R 8A, resistance R 8B, resistance R 8C forms positive-feedback circuit.
6. four-wire system resistance and temperature transmitter as claimed in claim 1, it is characterized in that: described signal amplification circuit is made up of integrated transporting discharging OP-07 and resistance R 4A, resistance R 4B, resistance R 4C, resistance R 5A, resistance R 5B, the input port 3 of integrated transporting discharging OP-07 links to each other with resistance R 9A, the input port 2 of integrated transporting discharging OP-07 is connected with resistance R 4A, resistance R 4B, resistance R 4C, the output port 6 of integrated transporting discharging OP-07 links to each other with input port 2 by resistance R 5A, resistance R 5B, thereby realizes voltage signal is amplified.
7. four-wire system resistance and temperature transmitter as claimed in claim 1, it is characterized in that: described signal adjustment circuit is made up of resistance R 5B, resistance R 6A, resistance R 6B, resistance R 7A and stabilivolt DZ4, the input end of described stabilivolt DZ4 links to each other with the end of resistance R 5B, resistance R 6B, the output terminal of described stabilivolt DZ4 links to each other with R6A, resistance R 7A, be used for when difference appears in signal and standard signal, adjust, make it consistent with standard signal.
8. four-wire system resistance and temperature transmitter as claimed in claim 1, it is characterized in that: described signal isolation circuit comprises integrated transporting discharging OP07, transformer U5, triode T0, resistance R 9, resistance R 10, capacitor C 5, capacitor C 6, diode D9, diode D10, diode D11, resistance R 101, resistance R 102, resistance R 201, resistance R 202, capacitor C 102, capacitor C 103, capacitor C 202, capacitor C 203, wherein, the output port 6 of integrated transporting discharging OP07 links to each other with the base stage of triode with diode D8 by resistance R 8, and the collector of triode T0 links to each other with an end of the input end of transformer U5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201269214U CN202057430U (en) | 2011-04-27 | 2011-04-27 | Four wire system resistance thermometer detector temperature transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201269214U CN202057430U (en) | 2011-04-27 | 2011-04-27 | Four wire system resistance thermometer detector temperature transmitter |
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| Publication Number | Publication Date |
|---|---|
| CN202057430U true CN202057430U (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201269214U Expired - Lifetime CN202057430U (en) | 2011-04-27 | 2011-04-27 | Four wire system resistance thermometer detector temperature transmitter |
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| CN (1) | CN202057430U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033278A (en) * | 2012-12-26 | 2013-04-10 | 重庆川仪自动化股份有限公司 | Integrative temperature transmitter |
| CN107482990A (en) * | 2017-10-11 | 2017-12-15 | 荣成市华诚橡胶有限公司 | A kind of speed change gear of Rubber Conveyor Belt Scrap |
-
2011
- 2011-04-27 CN CN2011201269214U patent/CN202057430U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033278A (en) * | 2012-12-26 | 2013-04-10 | 重庆川仪自动化股份有限公司 | Integrative temperature transmitter |
| CN103033278B (en) * | 2012-12-26 | 2015-07-29 | 重庆川仪自动化股份有限公司 | Integrative temperature transmitter |
| CN107482990A (en) * | 2017-10-11 | 2017-12-15 | 荣成市华诚橡胶有限公司 | A kind of speed change gear of Rubber Conveyor Belt Scrap |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20111130 |