CN207095717U - A kind of temperature transmitter circuit structure - Google Patents
A kind of temperature transmitter circuit structure Download PDFInfo
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- CN207095717U CN207095717U CN201720390406.4U CN201720390406U CN207095717U CN 207095717 U CN207095717 U CN 207095717U CN 201720390406 U CN201720390406 U CN 201720390406U CN 207095717 U CN207095717 U CN 207095717U
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Abstract
A kind of temperature transmitter circuit structure, including temperature collection circuit, signal amplification circuit, filter circuit, 50HZ trappers, correcting circuit, voltage conversion circuit and V/I change-over circuits；Temperature collection circuit output port is connected with signal amplification circuit input port, signal amplification circuit output end is connected with filter circuit input port, filter circuit output port is connected with 50HZ trapper input ports, 50HZ trappers output port is connected with calibration circuit input end mouth, and correcting circuit output port group is connected with voltage conversion circuit input port and V/I change-over circuits respectively.The Acquisition Circuit of the temperature of setting effectively can be acquired to the temperature of industry spot.The correcting circuit of setting can carry out error compensation to advance signal so that output signal accuracy is higher.
Description
Technical field
It the utility model is related to sensor circuit field, and in particular to a kind of temperature transmitter circuit structure.
Background technology
In industry spot, it is necessary to be surveyed to all kinds of non-electrical physical quantitys such as temperature, pressure, speed, angle, humidity, flow
Amount, when measuring these non-electrical physical quantitys, it is necessary first to analog electric signal is converted into, it is then outer to hundreds of meters by wire transmission
Control centre or display device on.This instrument that physical quantity is converted into 4~20mA of standard signal or (1~5V) is referred to as becoming
Send device.When conversion signal, because antijamming capability is not strong, the signal of transmission holds traditional transformer during transmission
It is vulnerable to interference, causes distorted signals, causes the data deviation that measures larger, in order to solve this problem, it is therefore desirable to provide
A kind of strong antijamming capability, the circuit structure for transferring and transmitting signal can be stablized.
Utility model content
The utility model in view of the shortcomings of the prior art, proposes a kind of temperature transmitter circuit structure, concrete technical scheme
It is as follows：A kind of temperature transmitter circuit structure, it is characterised in that：Including temperature collection circuit, signal amplification circuit, filtered electrical
Road, 50HZ trappers, correcting circuit, voltage conversion circuit and V/I change-over circuits；
The temperature collection circuit output port is connected with the signal amplification circuit input port, the signal amplification electricity
Road output end is connected with the filter circuit input port, and the filter circuit output port inputs with the 50HZ trappers
Port is connected, and the 50HZ trappers output port is connected with the correcting circuit input port, the correcting circuit output end
Mouth group is connected with the voltage conversion circuit input port and the V/I change-over circuits respectively；
The V/I change-over circuits include amplifier U6B, triode Q4, amplifier U6A and triode Q3, the amplifier
U6B inputs in the same direction are connected by resistance R55 with correcting circuit output end, the amplifier U6B output ends and the triode
Q4 base stages are connected, and the triode Q4 emitter stages are connected to the ground by resistance R61, the amplifier U6B reverse input ends and institute
Triode Q4 emitter stages are stated to be connected；
The triode Q4 colelctor electrodes tie point is connected through resistance R51 with power supply, and the second branch road is through resistance R48 and three
Pole pipe Q3 emitter stages are connected, and the transistor base Q3 is connected with the amplifier U6A output ends, and the amplifier U6B is in the same direction
Input is connected with the triode Q4 colelctor electrodes, the amplifier U6B reverse input ends and the triode Q3 emitter stage phases
Even, the triode Q3 colelctor electrodes are connected with diode D4 anodes, and the diode D4 negative electrodes are current signal output end mouth.
The utility model is achieved in that：Temperature change is converted into the change of voltage by temperature collection circuit, is put by signal
After the variable signal of sensor is amplified processing by big circuit, then processing is filtered by wave filter, then passes through trap
Device remove 50HZ Hz noises, then by correcting circuit to advance signal carry out deviation compensation after, a-road-through overvoltage conversion electricity
Road controls voltage output signal between 1V-5V, and another way is controlled electric current output size in 4- by V/I change-over circuits
Between 20mA.
Preferably to realize the utility model, may further be：The voltage conversion circuit includes amplifier U4B, amplification
Device U4A and triode Q2, the amplifier U4B inputs in the same direction are connected by resistance R42 with the correcting circuit output port,
The amplifier U4B reverse input ends are connected by resistance R39 with the amplifier U4B output ends, the amplifier U4B outputs
End is connected by resistance R43 with the amplifier U4A inputs in the same direction, and the amplifier U4B reverse input ends pass through resistance
R40 is grounded, and the amplifier U4A output ends are connected by resistance R41 with the triode Q2 base stages, the triode Q2 current collections
Pole connects power supply, the triode emission extremely voltage output end mouth.Amplifier U4B, R39 and R42 form voltage follower circuit, increase
Big output impedance.Amplifier U4A, triode Q2, resistance R38 composition amplifying circuits, voltage amplification is stable, linear increasing
It is long.
The beneficial effects of the utility model are：First, the Acquisition Circuit of the temperature of setting can be effectively to industry spot
Temperature is acquired.Second, the wave filter of setting is by amplifier U6A, resistance R31, resistance R32, electric capacity C11 and electric capacity C12 groups
Into can effectively consider the interference signal except 100HZ or so.3rd, the 50HZ trappers of setting, it is by RC twin-T network second order bands
Wave filter is hindered, can effectively filter out Hz noise.4th, the correcting circuit of setting can carry out error benefit to advance signal
Repay so that output signal accuracy is higher.Above-mentioned advantage make it that application of the present utility model is wider, is easy to of the present utility model
Utilization and extention.
Brief description of the drawings
Fig. 1 is circuit theory diagrams；
Fig. 2 is temperature collection circuit structure chart；
Fig. 3 is filter circuit and 50HZ trapper structure charts；
Fig. 4 is correction circuit structure schematic diagram；
Fig. 5 is voltage conversion circuit structural representation；
Fig. 6 is V/I converting circuit structure schematic diagrames.
Embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
As shown in Figure 1：A kind of temperature transmitter circuit structure, including temperature collection circuit, signal amplification circuit, filtered electrical
Road, 50HZ trappers, correcting circuit, voltage conversion circuit and V/I change-over circuits；
Temperature collection circuit output port is connected with signal amplification circuit input port, signal amplification circuit output end and filter
Wave circuit input port is connected, and filter circuit output port is connected with 50HZ trapper input ports, 50HZ trapper output ends
Mouth is connected with correcting circuit input port, and correcting circuit output port group turns with voltage conversion circuit input port and V/I respectively
Circuit is changed to be connected.
Temperature collection circuit is illustrated in figure 2, the temperature collection circuit is made up of P1, R1, R2, R3, R4 and amplifier U1,
J2 is connected with PT100 thermal resistance temperature sensors, and electric signal is passed in thermal resistance temperature sensor input J2 2 ports to be put
Big device U1 positive input, amplifier U1 reverse input ends are connected through resistance R2 with power supply VZ, and amplifier U1 inputs forward direction
The Vin+ signals at end and the Vin- signals of reverse input end export after carrying out signal amplification, amplifier U1 models INA128.
Be illustrated in figure 3 filter circuit and 50HZ trappers, the filter circuit by operational amplifier U6A, resistance R31,
R32, electric capacity C11, C12 composition.The quality of temperature signal is improved, reduces interference, filters out more than 100Hz various High-frequency Interferences
Signal, therefore the frequency for designing low pass filter is 100HZ or so.In temperature acquisition, 50HZ Hz noises are mainly to disturb
Source, circuit use RC twin-T network second order bandstop filters, can be with the relatively good interference for filtering out power frequency, and 50HZ trappers are by transporting
Calculate amplifier U6B, resistance R33, R34, R35, R36, electric capacity C13, C14, C15, C16 composition.
Peaking circuit is illustrated in figure 4, the peaking circuit is made up of the U2B subtraction circuits formed and U2A
Differential amplifier circuit forms, if the voltage of U2B the 7th pin output is V7, the voltage of the 1st pin output is V1, and the point position of P2 points is
V0, then
V7=(Vsingle-V0) * R29/R33；(V0 is P2 point position).
V1=V7*R30/R32.
Debugging when, potentiometer is adjusted to 0.9v；When temperature is 0 DEG C：V7=0.5v；V1=0.5V；
When temperature is 100 DEG C：V1=2.5v；V7=2.5V.
As shown in Figure 5：Voltage conversion circuit includes amplifier U4B, amplifier U4A and triode Q2, and amplifier U4B is in the same direction
Input is connected by resistance R42 with correcting circuit output port, and amplifier U4B reverse input ends pass through resistance R39 and amplification
Device U4B output ends are connected, and amplifier U4B output ends are connected by resistance R43 with amplifier U4A inputs in the same direction, amplifier U4B
Reverse input end is grounded by resistance R40, and amplifier U4A output ends are connected by resistance R41 with triode Q2 base stages, three poles
Pipe Q2 colelctor electrodes connect power supply, triode emission extremely voltage output end mouth.
Amplifier U4B output end is consistent with anode input；Amplifier U4A output end voltage is V=Vin * R38/
R40；By the input of control signal, by the control of voltage output size within the scope of 1-5v.
As shown in Figure 6：V/I change-over circuits include amplifier U6B, triode Q4, amplifier U6A and triode Q3, amplification
Device U6B inputs in the same direction are connected by resistance R55 with correcting circuit output end, amplifier U6B output ends and triode Q4 base stages
It is connected, triode Q4 emitter stages are connected to the ground by resistance R61, amplifier U6B reverse input ends and triode Q4 emitter stage phases
Even；
Triode Q4 colelctor electrodes tie point is connected through resistance R51 with power supply, and the second branch road is through resistance R48 and triode
Q3 emitter stages are connected, and transistor base Q3 is connected with amplifier U6A output ends, amplifier U6B inputs in the same direction and triode Q4
Colelctor electrode is connected, and amplifier U6B reverse input ends are connected with triode Q3 emitter stages, triode Q3 colelctor electrodes and diode D4
Anode is connected, and diode D4 negative electrodes are current signal output end mouth.
When input voltage is Vin, amplifier U6B communication input voltage is Vin, by amplifier characteristic, amplifier U6B
Reverse input end voltage is also Vin, and R61 both end voltages are also equal to Vin.Because R51 resistances are identical with R61, so, R51 both ends
Voltage is also equal to Vin, then by operational amplifier characteristic, amplifier U6B reverse input ends input electricity in the same direction with amplifier U6B
Position is identical, so R48 both end voltages R51 is identical, equal to Vin.R48 is 2W high-power resistance.Electric current exports：Iout=
Vin/R48.By the input of control signal, by the control of electric current output size within the scope of 4-20mA.
When temperature is 0 DEG C：Iout=Vin/R48=0.5/125=4ma.
When temperature is 100 DEG C：Iout=Vin/R48=2.5/125=20ma.
Claims (2)
- A kind of 1. temperature transmitter circuit structure, it is characterised in that：Including temperature collection circuit, signal amplification circuit, filtered electrical Road, 50HZ trappers, correcting circuit, voltage conversion circuit and V/I change-over circuits；The temperature collection circuit output port is connected with the signal amplification circuit input port, and the signal amplification circuit is defeated Go out end with the filter circuit input port to be connected, the filter circuit output port and the 50HZ trappers input port phase Even, the 50HZ trappers output port is connected with the correcting circuit input port, the correcting circuit output port component It is not connected with the voltage conversion circuit input port and the V/I change-over circuits；It is same that the V/I change-over circuits include amplifier U6B, triode Q4, amplifier U6A and triode Q3, the amplifier U6B It is connected to input by resistance R55 with correcting circuit output end, the amplifier U6B output ends and the triode Q4 base stages It is connected, the triode Q4 emitter stages are connected to the ground by resistance R61, the amplifier U6B reverse input ends and three pole Pipe Q4 emitter stages are connected；The triode Q4 colelctor electrodes tie point is connected through resistance R51 with power supply, and the second branch road is through resistance R48 and triode Q3 Emitter stage is connected, and the transistor base Q3 is connected with the amplifier U6A output ends, the amplifier U6B inputs in the same direction It is connected with the triode Q4 colelctor electrodes, the amplifier U6B reverse input ends are connected with the triode Q3 emitter stages, described Triode Q3 colelctor electrodes are connected with diode D4 anodes, and the diode D4 negative electrodes are current signal output end mouth.
- A kind of 2. temperature transmitter circuit structure according to claim 1, it is characterised in that：The voltage conversion circuit includes Amplifier U4B, amplifier U4A and triode Q2, the amplifier U4B inputs in the same direction pass through resistance R42 and the correction electricity Road output port is connected, and the amplifier U4B reverse input ends are connected by resistance R39 with the amplifier U4B output ends, institute State amplifier U4B output ends by resistance R43 with the amplifier U4A inputs in the same direction to be connected, the amplifier U4B is reversely defeated Enter end to be grounded by resistance R40, the amplifier U4A output ends are connected by resistance R41 with the triode Q2 base stages, described Triode Q2 colelctor electrodes connect power supply, the triode emission extremely voltage output end mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720390406.4U CN207095717U (en) | 2017-04-12 | 2017-04-12 | A kind of temperature transmitter circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720390406.4U CN207095717U (en) | 2017-04-12 | 2017-04-12 | A kind of temperature transmitter circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207095717U true CN207095717U (en) | 2018-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720390406.4U Expired - Fee Related CN207095717U (en) | 2017-04-12 | 2017-04-12 | A kind of temperature transmitter circuit structure |
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| CN (1) | CN207095717U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110806228A (en) * | 2019-04-24 | 2020-02-18 | 神盾股份有限公司 | Calibration circuit for sensor and related sensor |
-
2017
- 2017-04-12 CN CN201720390406.4U patent/CN207095717U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110806228A (en) * | 2019-04-24 | 2020-02-18 | 神盾股份有限公司 | Calibration circuit for sensor and related sensor |
| US11175179B2 (en) | 2019-04-24 | 2021-11-16 | Egis Technology Inc. | Calibration circuit for use in sensor and related sensor thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180313 Termination date: 20190412 |