CN206041965U - High -precision 4~20mA converts 10V's current -voltage conversion module to - Google Patents
High -precision 4~20mA converts 10V's current -voltage conversion module to Download PDFInfo
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- CN206041965U CN206041965U CN201621081512.6U CN201621081512U CN206041965U CN 206041965 U CN206041965 U CN 206041965U CN 201621081512 U CN201621081512 U CN 201621081512U CN 206041965 U CN206041965 U CN 206041965U
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Abstract
The utility model discloses a high -precision 4~20mA converts 10V's current -voltage conversion module to, including the electric current the voltage conversion part, the anti -interference part of phase inverter, the subtraction circuit part, the voltage signal differential amplification part, the electric current does 4~20mA current signal that voltage conversion partially will input turn into 2V ~ 10V voltage signal, do by the anti -interference fractional conversion of phase inverter again 2V ~ 10V voltage signal, is the subtraction circuit part done " subtraction " back with the anti -interference part of phase inverter and is produced 4V~4V voltage signal, the voltage signal differential amplification part 4V~4V's voltage signal differential amplification 2.5 doubly, output 10V~10V's voltage signal, the utility model has the advantages of high, the corresponding linear degree of output accuracy is good, the circuit form is simple, the reliability is high, can regard as the uses such as interface, record appearance converter, detection interface circuit of DC servomotor circuit.
Description
Technical field
This utility model is related to current/voltage modular converter technical field, more specifically a kind of 4～20mA of high precision
It is converted into the current/voltage modular converter of ± 10V.
Background technology
In recent years, due to, reliability, cost, circuit body more and more harsher to the requirement in electronic system to change-over circuit
Long-pending requirement is more and more diversified, needs circuit reliability high, and manufacturing cost is low, while modularity, miniaturization will be realized.It is long
The reliability of phase work, stability must be high, and capacity of resisting disturbance is necessarily eager to excel.On the other hand, traditional conversion it is many by 4～
20mA current signals are converted into the voltage signal of 0～+10V, need extra additive polarity change-over circuit change the electricity of 0～-10V
Pressure signal, the most analog circuits using substantial amounts of discrete device composition of circuit, circuit structure are complicated, and reliability is low, the linearity
Poor, circuit volume is larger.Traditional detection mode can not increasingly meet requirement of the Modernization System to change-over circuit.
In traditional detection method, circuit structure is complicated, and reliability is low, and the linearity is poor, the shortcomings of circuit volume is larger.
Utility model content
This utility model is for avoiding the weak point existing for above-mentioned prior art, there is provided a kind of 4～20mA of high precision
It is converted into the current/voltage modular converter of ± 10V.
This utility model solves the technical scheme that adopted of technical problem：
A kind of 4～20mA of high precision is converted into the current/voltage modular converter of ± 10V, including：
Precision resistor R1 is accessed current loop by current-voltage conversion portion, and current signal flows through precision resistor R1
Corresponding voltage signal is produced, the voltage signal of generation is+2V～+10V；
Prime is produced the voltage signal anti-phase 1 of+2V～+10V by the anti-interference part of phase inverter:1 is converted to -2V～-10V
Voltage signal, and the interference signal produced in suppressing current loop；
Subtraction circuit part, surely arrives 6.2V by stabilivolt ZD1 by supply voltage pre-, then through potentiometer RW1, RW2,
RW3 is accurately adjusted to 6.0V as subtractor reference voltage, and resistance R7 is current-limiting resistance, and subtraction circuit part is anti-interference with phase inverter
Part produces the voltage signal of -2V～-10V and makees " subtraction " generation -4V～+4V voltage signals afterwards；
The differential amplifier section of voltage signal, the voltage signal of -4V～+4V that prime is produced is differential to amplify 2.5 times, defeated
Go out the interference signal between the voltage signal of -10V～+10V, and secondary suppression circuit.
Preferably, the current-voltage conversion portion includes precision resistor R1, current source, precision resistor R1 connections
In the two ends of current source, the resistance of precision resistor R1 is 500 Ω, and current source input current is 4 ~ 20mA.
Preferably, the anti-interference part of the phase inverter includes integrated operational amplifier U1-A, resistance R2～R5 and potentiometer
The in-phase input end of RW1, integrated operational amplifier U1-A is connected with resistance R3, the anti-phase input of integrated operational amplifier U1-A
End is connected with resistance R2, and the other end Jing precision resistors R1 of resistance R3 is connected with the other end of resistance R2, integrated computation
Be connected with resistance R5 between the outfan and inverting input of amplifier U1-A, the circuit that potentiometer RW1 is composed in series.
Preferably, the subtraction circuit part includes stabilivolt ZD1, resistance R7, R10 and potentiometer RW3, potentiometer RW3
Connect stabilivolt ZD1 between two non-slip moved ends, the sliding end of potentiometer RW3 is connected with resistance R7.
Preferably, the differential amplifier section of the voltage signal include integrated operational amplifier U1-B, resistance R8, R9, R11 and
Resistance R8, potentiometer RW2 string is connected between the outfan and inverting input of potentiometer RW2, integrated operational amplifier U1-B
Joint group into circuit, the inverting input of integrated operational amplifier U1-B is also connected with resistance R7, integrated operational amplifier U1-
The outfan of B is connected with resistance R11, and the other end of resistance R11 is connected with voltage output end.
Operation principle of the present utility model is：
4 ~ 20mA the current signals being input into are converted into by -2V～-10V voltage signals by current-voltage conversion portion, instead
Prime is produced the voltage signal anti-phase 1 of+2V～+10V by the anti-interference part of phase device:1 is converted to -2V～-10V voltage signals, subtracts
The voltage signal that method circuit part produces -2V～-10V with the anti-interference part of phase inverter is made " subtraction " and produces -4V～+4V afterwards
Voltage signal, the voltage signal of -4V～+4V that prime is produced by the differential amplifier section of voltage signal is differential to amplify 2.5 times, defeated
Go out the voltage signal of -10V～+10V.
Interference signal between the anti-interference part of phase inverter and the differential amplifier section circuit capable of inhibiting of voltage signal.
Compared with prior art, the beneficial effects of the utility model are：
1st, function admirable, effectively improves reliability.
Several shortcomings of this this utility model for traditional method, have carried out brand-new design and perfect.So as to effectively keep away
Exempt from circuit structure complicated, the low shortcoming of stability.Effectively increase conversion accuracy and reliability.
2nd, simple circuit, working stability.
This utility model circuit form is simple, and number of devices used contrasts traditional circuit and greatly reduces, only need to be according to original
Reason figure meets use requirement by being assembled.The circuit has higher Ability of Resisting Disturbance simultaneously.
Description of the drawings
Fig. 1 is the current/voltage modular converter structural representation that a kind of 4～20mA of high precision of this utility model is converted into ± 10V
Figure.
Specific embodiment
Referring to Fig. 1, a kind of 4～20mA of high precision is converted into the current/voltage modular converter of ± 10V, including：
Precision resistor R1 is accessed current loop by current-voltage conversion portion, and current signal flows through precision resistor R1
Corresponding voltage signal is produced, the voltage signal of generation is+2V～+10V；
Prime is produced the voltage signal anti-phase 1 of+2V～+10V by the anti-interference part of phase inverter:1 is converted to -2V～-10V
Voltage signal, and the interference signal produced in suppressing current loop；
Subtraction circuit part, surely arrives 6.2V by stabilivolt ZD1 by supply voltage pre-, then through potentiometer RW1, RW2,
RW3 is accurately adjusted to 6.0V as subtractor reference voltage, and resistance R7 is current-limiting resistance, and subtraction circuit part is anti-interference with phase inverter
Part produces the voltage signal of -2V～-10V and makees " subtraction " generation -4V～+4V voltage signals afterwards；
The differential amplifier section of voltage signal, the voltage signal of -4V～+4V that prime is produced is differential to amplify 2.5 times, defeated
Go out the interference signal between the voltage signal of -10V～+10V, and secondary suppression circuit.
The current-voltage conversion portion includes precision resistor R1, current source, and precision resistor R1 is connected to current source
Two ends, the resistance of precision resistor R1 is 500 Ω, and current source input current is 4 ~ 20mA.
The anti-interference part of the phase inverter includes integrated operational amplifier U1-A, resistance R2～R5 and potentiometer RW1, integrated
The in-phase input end of operational amplifier U1-A is connected with resistance R3, the inverting input and resistance of integrated operational amplifier U1-A
R2 is connected, and the other end Jing precision resistors R1 of resistance R3 is connected with the other end of resistance R2, integrated operational amplifier U1-
Be connected with resistance R5 between the outfan and inverting input of A, the circuit that potentiometer RW1 is composed in series.
The subtraction circuit part includes stabilivolt ZD1, resistance R7, R10 and potentiometer RW3, two non-slip of potentiometer RW3
Connect stabilivolt ZD1 between moved end, the sliding end of potentiometer RW3 is connected with resistance R7.
The differential amplifier section of the voltage signal includes integrated operational amplifier U1-B, resistance R8, R9, R11 and potentiometer
It is connected with resistance R8, potentiometer RW2 to be composed in series between the outfan and inverting input of RW2, integrated operational amplifier U1-B
Circuit, the inverting input of integrated operational amplifier U1-B is also connected with resistance R7, and integrated operational amplifier U1-B's is defeated
Go out end to be connected with resistance R11, the other end of resistance R11 is connected with voltage output end.
A kind of 4～20mA of high precision that this utility model is provided is converted into the current/voltage modular converter of ± 10V by such as
Under mode work：
4 ~ 20mA the current signals being input into are converted into by -2V～-10V voltage signals by current-voltage conversion portion, instead
Prime is produced the voltage signal anti-phase 1 of+2V～+10V by the anti-interference part of phase device:1 is converted to -2V～-10V voltage signals, subtracts
The voltage signal that method circuit part produces -2V～-10V with the anti-interference part of phase inverter is made " subtraction " and produces -4V～+4V afterwards
Voltage signal, the voltage signal of -4V～+4V that prime is produced by the differential amplifier section of voltage signal is differential to amplify 2.5 times, defeated
Go out the voltage signal of -10V～+10V.
Technical solutions of the utility model are exemplarily described to this utility model above in conjunction with accompanying drawing, it is clear that this reality
It is not subject to the restrictions described above with new implementing, as long as employ method design of the present utility model entering with technical scheme
Capable various unsubstantialities are improved, or not improved the design of utility model and technical scheme are directly applied to other occasions
, within protection domain of the present utility model.
Claims (5)
1. a kind of 4～20mA of high precision is converted into the current/voltage modular converter of ± 10V, including：
Precision resistor R1 is accessed current loop by current-voltage conversion portion, and current signal flows through precision resistor R1 generations
Corresponding voltage signal, the voltage signal of generation is+2V～+10V；
Prime is produced the voltage signal anti-phase 1 of+2V～+10V by the anti-interference part of phase inverter:1 is converted to -2V～-10V voltages
Signal, and the interference signal produced in suppressing current loop；
Subtraction circuit part, surely arrives 6.2V by stabilivolt ZD1 by supply voltage pre-, then through potentiometer RW1, RW2, RW3
6.0V is adjusted to accurately as subtractor reference voltage, resistance R7 is current-limiting resistance, subtraction circuit part and the anti-interference portion of phase inverter
Divide the voltage signal for producing -2V～-10V to make " subtraction " and produce -4V～+4V voltage signals afterwards；
The differential amplifier section of voltage signal, the voltage signal of -4V～+4V that prime is produced is differential to amplify 2.5 times, output -10V
Interference signal between the voltage signal of～+10V, and secondary suppression circuit.
2. a kind of 4～20mA of high precision according to claim 1 is converted into the current/voltage modular converter of ± 10V, and which is special
Levy and be：The current-voltage conversion portion includes precision resistor R1, current source, and precision resistor R1 is connected to current source
Two ends, the resistance of precision resistor R1 is 500 Ω, and current source input current is 4 ~ 20mA.
3. a kind of 4～20mA of high precision according to claim 1 is converted into the current/voltage modular converter of ± 10V, and which is special
Levy and be：The anti-interference part of the phase inverter includes integrated operational amplifier U1-A, resistance R2～R5 and potentiometer RW1, integrated
The in-phase input end of operational amplifier U1-A is connected with resistance R3, the inverting input and resistance of integrated operational amplifier U1-A
R2 is connected, and the other end Jing precision resistors R1 of resistance R3 is connected with the other end of resistance R2, integrated operational amplifier U1-
Be connected with resistance R5 between the outfan and inverting input of A, the circuit that potentiometer RW1 is composed in series.
4. a kind of 4～20mA of high precision according to claim 1 is converted into the current/voltage modular converter of ± 10V, and which is special
Levy and be：The subtraction circuit part includes stabilivolt ZD1, resistance R7, R10 and potentiometer RW3, two non-slip of potentiometer RW3
Connect stabilivolt ZD1 between moved end, the sliding end of potentiometer RW3 is connected with resistance R7.
5. a kind of 4～20mA of high precision according to claim 1 is converted into the current/voltage modular converter of ± 10V, and which is special
Levy and be：The differential amplifier section of the voltage signal includes integrated operational amplifier U1-B, resistance R8, R9, R11 and potentiometer
It is connected with resistance R8, potentiometer RW2 to be composed in series between the outfan and inverting input of RW2, integrated operational amplifier U1-B
Circuit, the inverting input of integrated operational amplifier U1-B is also connected with resistance R7, and integrated operational amplifier U1-B's is defeated
Go out end to be connected with resistance R11, the other end of resistance R11 is connected with voltage output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621081512.6U CN206041965U (en) | 2016-09-26 | 2016-09-26 | High -precision 4~20mA converts 10V's current -voltage conversion module to |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621081512.6U CN206041965U (en) | 2016-09-26 | 2016-09-26 | High -precision 4~20mA converts 10V's current -voltage conversion module to |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206041965U true CN206041965U (en) | 2017-03-22 |
Family
ID=58296691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621081512.6U Withdrawn - After Issue CN206041965U (en) | 2016-09-26 | 2016-09-26 | High -precision 4~20mA converts 10V's current -voltage conversion module to |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206041965U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422178A (en) * | 2017-08-05 | 2017-12-01 | 海鹰企业集团有限责任公司 | A kind of transmitter that electric current is gone to voltage |
| PL423693A1 (en) * | 2017-12-04 | 2019-06-17 | Instytut Tele-I Radiotechniczny | System for measuring system with galvanic isolation |
-
2016
- 2016-09-26 CN CN201621081512.6U patent/CN206041965U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422178A (en) * | 2017-08-05 | 2017-12-01 | 海鹰企业集团有限责任公司 | A kind of transmitter that electric current is gone to voltage |
| CN107422178B (en) * | 2017-08-05 | 2019-06-14 | 海鹰企业集团有限责任公司 | A kind of transmitter that electric current is gone to voltage |
| PL423693A1 (en) * | 2017-12-04 | 2019-06-17 | Instytut Tele-I Radiotechniczny | System for measuring system with galvanic isolation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170322 Effective date of abandoning: 20230407 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20170322 Effective date of abandoning: 20230407 |