CN106020264A - Signal acquisition and processing system for digital temperature controller - Google Patents
Signal acquisition and processing system for digital temperature controller Download PDFInfo
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- CN106020264A CN106020264A CN201610454524.7A CN201610454524A CN106020264A CN 106020264 A CN106020264 A CN 106020264A CN 201610454524 A CN201610454524 A CN 201610454524A CN 106020264 A CN106020264 A CN 106020264A
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- amplifier
- outfan
- pole
- resistance
- audion
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1917—Control of temperature characterised by the use of electric means using digital means
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
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Abstract
The invention discloses a signal acquisition and processing system for a digital temperature controller. The signal acquisition and processing system is characterized in that the signal acquisition and processing system is mainly composed of a temperature sensor U, a resistor R1, a two-stage amplifying circuit, a feedback circuit, a voltage following circuit, and a potentiometer R3; one end of the resistor R1 is connected with the temperature sensor U, and the other end of the resistor R1 passes through a potentiometer R2 and thereafter is grounded; the two-stage amplifying circuit is connected with the temperature sensor U; the feedback circuit and the voltage following circuit are connected with the two-stage amplifying circuit; and one end of the potentiometer R3 is connected with a power source, the other end of the potentiometer R3 is grounded, and the control end of the potentiometer R3 is connected with the two-stage amplifying circuit. With the signal acquisition and processing system of the invention adopted, weak signals outputted by the temperature sensor can be amplified, the waveforms of output signals can be consistent with the waveforms of input signals, and therefore, the fidelity of the output signals can be ensured, the temperature detection accuracy of the electronic temperature controller can be improved, and the electronic temperature controller can carry out temperature control more accurately.
Description
Technical field
The present invention relates to domain of control temperature, specifically refer to a kind of purpose digital temperature controller signal acquisition process system
System.
Background technology
Along with the development of science and technology, purpose digital temperature controller has been widely used in the middle of daily commercial production, its
For the temperature of production equipment, environment being detected and controlling, to improve production efficiency and product quality.
But, the signal processing system that existing purpose digital temperature controller is used easily makes signal when to signal processing
Waveform occur distortion, cause purpose digital temperature controller not accurate enough to temperature detection, had a strong impact on it to temperature
The control accuracy of degree.
Summary of the invention
The signal processing system that it is an object of the invention to overcome existing purpose digital temperature controller to be used easily is subject to
Defect to outside electromagnetic interference, it is provided that a kind of purpose digital temperature controller signal acquiring processing system.
The purpose of the present invention is achieved through the following technical solutions: a kind of purpose digital temperature controller signal acquisition process
System, mainly by temperature sensor U, one end is connected with temperature sensor U, the other end is through potentiometer R2
The resistance R1 of rear ground connection, the two-stage amplifying circuit being connected with temperature sensor U, amplifies electricity with two-stage respectively
Feedback circuit that road is connected and voltage follower circuit, and a termination power, other end ground connection, control end
The potentiometer R3 composition being then connected with two-stage amplifying circuit；The control end of described potentiometer R2 then with resistance
R1 is connected with the junction point of potentiometer R2.
Further, described two-stage amplifying circuit is by amplifier P1, audion VT1, amplifier P3, positive pole
Be connected with the positive pole of amplifier P1, electric capacity C1, P pole that negative pole is connected with the outfan of amplifier P1
Be connected with the outfan of amplifier P1, N pole base stage with audion VT1 after electric capacity C3 is connected
Diode D1, is serially connected in the resistance R7 between positive pole and the outfan of amplifier P3, and one end and amplification
The resistance R5 composition that the positive pole of device P3 is connected, the other end is then connected with the control end of potentiometer R3；Institute
The negative pole stating amplifier P1 is connected with temperature sensor U, its outfan is then connected with feedback circuit；Institute
The emitter stage stating audion VT1 is connected with feedback circuit, its colelctor electrode then negative pole with amplifier P3 is connected
Connect；The outfan of described amplifier P3 is connected with feedback circuit and voltage follower circuit respectively.
Described feedback circuit is by amplifier P2, and positive pole is connected with the outfan of amplifier P1, negative pole and amplification
The electric capacity C2 that the outfan of device P2 is connected, is serially connected in the resistance between outfan and the negative pole of amplifier P2
R4, the resistance R6 being serially connected between the positive pole of amplifier P2 and the emitter stage of audion VT1, and positive pole
Be connected with the negative pole of amplifier P2, electricity that negative pole outfan with amplifier P3 after resistance R8 is connected
Hold C4 composition；The minus earth of described electric capacity C4.
Described voltage follower circuit by audion VT2, diode D2, the N pole phase of one end and diode D2
Connect, the other end as the resistance R10 of the outfan of this voltage follower circuit, the N of positive pole and diode D2
The electric capacity C6 that pole is connected, negative pole then colelctor electrode with audion VT2 is connected, positive pole and amplifier P3
The electric capacity C5 that outfan is connected, negative pole is connected with the base stage of audion VT2, and one end and three poles
The emitter stage of pipe VT2 is connected, the resistance R9 of other end ground connection composition.
Described temperature sensor U is AD590 current mode integrated temperature sensor.
The present invention compared with the prior art, has the following advantages and beneficial effect:
(1) present invention can to temperature sensor output small-signal be amplified, and make output signal with
The waveform of input signal keeps consistent, it is ensured that the fidelity of output signal, such that it is able to improve digital temperature
The temperature detecting precision of control device, enables purpose digital temperature controller to be controlled temperature more accurately.
(2) present invention uses AD590 current mode integrated temperature sensor, and its capacity of resisting disturbance is strong, Ke Yiti
The stability of the high present invention.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by temperature sensor U, one end is connected with temperature sensor U,
The other end is the resistance R1 of ground connection after potentiometer R2, the two-stage amplifying circuit being connected with temperature sensor U,
The feedback circuit being connected with two-stage amplifying circuit respectively and voltage follower circuit, and a termination power, another
The potentiometer R3 composition that one end ground connection, control end are then connected with two-stage amplifying circuit.Described potentiometer R2
The end then junction point with resistance R1 and potentiometer R2 that controls be connected.In order to preferably implement the present invention,
This temperature sensor U preferred AD590 current mode integrated temperature sensor realizes, and this temperature sensor is anti-dry
Ability of disturbing is strong, can improve the stability of the present invention.
Wherein, two-stage amplifying circuit is by amplifier P1, audion VT1, amplifier P3, electric capacity C1, electricity
Hold C3, potentiometer R3, resistance R5, resistance R6 and resistance R7 composition.
During connection, the positive pole of electric capacity C1 is connected with the positive pole of amplifier P1, its negative pole and amplifier P1
Outfan is connected.The P pole of diode D1 is connected with the outfan of amplifier P1, its N pole is through electric capacity
After C3, the base stage with audion VT1 is connected.Resistance R7 is serially connected in positive pole and the outfan of amplifier P3
Between.One end of resistance R5 is connected with the positive pole of amplifier P3, its other end then with the control of potentiometer R3
End processed is connected.
Meanwhile, the negative pole of described amplifier P1 be connected with temperature sensor U, its outfan then with feedback electricity
Road is connected.The emitter stage of described audion VT1 is connected with feedback circuit, its colelctor electrode then with amplifier
The negative pole of P3 is connected.The outfan of described amplifier P3 is connected with feedback circuit and voltage follower circuit respectively
Connect.
It addition, described feedback circuit is by amplifier P2, resistance R4, resistance R6, resistance R8, electric capacity C2
And electric capacity C4 composition.The positive pole of this electric capacity C2 is connected with the outfan of amplifier P1, its negative pole with put
The outfan of big device P2 is connected.Resistance R4 is serially connected between outfan and the negative pole of amplifier P2.Resistance
R6 is serially connected between the positive pole of amplifier P2 and the emitter stage of audion VT1.The positive pole of electric capacity C4 with put
The negative pole of big device P2 is connected, its negative pole outfan with amplifier P3 after resistance R8 is connected.Described
The minus earth of electric capacity C4.
This voltage follower circuit is by audion VT2, diode D2, resistance R9, resistance R10, electric capacity C5
And electric capacity C6 composition.
During connection, one end of resistance R10 is connected with the N pole of diode D2, its other end is as this electricity
Press the outfan of follow circuit and connect external control system.The N pole phase of the positive pole of electric capacity C6 and diode D2
Connect, its negative pole then colelctor electrode with audion VT2 is connected.The positive pole of electric capacity C5 is with amplifier P3's
Outfan is connected, negative pole is connected with the base stage of audion VT2.One end of resistance R9 and audion VT2
Emitter stage be connected, its other end ground connection.
The small-signal of temperature sensor output can be amplified by the present invention, and makes output signal and input
The waveform of signal keeps consistent, it is ensured that the fidelity of output signal, such that it is able to improve purpose digital temperature controller
Temperature detecting precision, enable purpose digital temperature controller more accurately temperature to be controlled.
As it has been described above, just can well realize the present invention.
Claims (5)
1. a purpose digital temperature controller signal acquiring processing system, it is characterised in that main by temperature sensing
Device U, one end is connected with temperature sensor U, other end resistance R1 of ground connection after potentiometer R2, with
The two-stage amplifying circuit that temperature sensor U is connected, the feedback circuit being connected with two-stage amplifying circuit respectively
And voltage follower circuit, and a termination power, other end ground connection, control end then with two-stage amplifying circuit phase
The potentiometer R3 composition connected；Described potentiometer R2 control end then with resistance R1 and the company of potentiometer R2
Contact is connected.
A kind of purpose digital temperature controller signal acquiring processing system the most according to claim 1, its feature
Being, described two-stage amplifying circuit is by amplifier P1, audion VT1, amplifier P3, positive pole and amplifier
The positive pole of P1 is connected, negative pole is connected with the outfan of amplifier P1 electric capacity C1, P pole and amplifier
The diode D1 that the outfan of P1 is connected, N pole base stage with audion VT1 after electric capacity C3 is connected,
It is serially connected in the resistance R7 between positive pole and the outfan of amplifier P3, and the positive pole of one end and amplifier P3
Be connected, the other end then with potentiometer R3 control end be connected resistance R5 composition；Described amplifier P1
Negative pole be connected with temperature sensor U, its outfan is then connected with feedback circuit；Described audion VT1
Emitter stage be connected with feedback circuit, its colelctor electrode then negative pole with amplifier P3 is connected；Described amplification
The outfan of device P3 is connected with feedback circuit and voltage follower circuit respectively.
A kind of purpose digital temperature controller signal acquiring processing system the most according to claim 2, its feature
Be, described feedback circuit by amplifier P2, positive pole is connected with the outfan of amplifier P1, negative pole with put
The electric capacity C2 that the outfan of big device P2 is connected, is serially connected in the electricity between outfan and the negative pole of amplifier P2
Resistance R4, the resistance R6, Yi Jizheng being serially connected between the positive pole of amplifier P2 and the emitter stage of audion VT1
Pole is connected with the negative pole of amplifier P2, negative pole outfan with amplifier P3 after resistance R8 is connected
Electric capacity C4 forms；The minus earth of described electric capacity C4.
A kind of purpose digital temperature controller signal acquiring processing system the most according to claim 3, its feature
Being, described voltage follower circuit is by the N pole of audion VT2, diode D2, one end and diode D2
Be connected, the other end as the resistance R10 of the outfan of this voltage follower circuit, positive pole is with diode D2's
The electric capacity C6 that N pole is connected, negative pole then colelctor electrode with audion VT2 is connected, positive pole and amplifier
The electric capacity C5 that the outfan of P3 is connected, negative pole is connected with the base stage of audion VT2, and one end with
The emitter stage of audion VT2 is connected, the resistance R9 of other end ground connection composition.
A kind of purpose digital temperature controller signal acquiring processing system the most according to claim 4, its feature
Being, described temperature sensor U is AD590 current mode integrated temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610454524.7A CN106020264A (en) | 2016-06-21 | 2016-06-21 | Signal acquisition and processing system for digital temperature controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610454524.7A CN106020264A (en) | 2016-06-21 | 2016-06-21 | Signal acquisition and processing system for digital temperature controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106020264A true CN106020264A (en) | 2016-10-12 |
Family
ID=57087132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610454524.7A Pending CN106020264A (en) | 2016-06-21 | 2016-06-21 | Signal acquisition and processing system for digital temperature controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106020264A (en) |
-
2016
- 2016-06-21 CN CN201610454524.7A patent/CN106020264A/en active Pending
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161012 |
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| WD01 | Invention patent application deemed withdrawn after publication |