CN105974955A - Signal processing system for electronic temperature controller based on differential signal conversion circuit - Google Patents
Signal processing system for electronic temperature controller based on differential signal conversion circuit Download PDFInfo
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- CN105974955A CN105974955A CN201610451608.5A CN201610451608A CN105974955A CN 105974955 A CN105974955 A CN 105974955A CN 201610451608 A CN201610451608 A CN 201610451608A CN 105974955 A CN105974955 A CN 105974955A
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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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Abstract
The invention discloses a signal processing system for an electronic temperature controller based on a differential signal conversion circuit. The signal processing system is characterized in that the signal processing system is mainly composed of a processing chip U, a polar capacitor C4, a frontend signal amplifying circuit which is connected with an IN pin of the processing chip U, a pulse shaping circuit which is connected with the processing chip U, a data signal output circuit which is connected with a CM pin of the processing chip U and the pulse shaping circuit, and the differential signal conversion circuit which is serially connected between the pulse shaping circuit and the data signal output circuit. The signal processing system can amplify the weak signal which is output from a temperature sensor and furthermore improves signal processing accuracy. Furthermore the signal processing system can keep waveform consistency between an output signal and an input signal and effectively ensures no waveform distortion of the output signal, thereby ensuring accurate temperature control of the electronic temperature controller.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of electronic type based on differential signal translation circuit
Temperature controller signal processing system.
Background technology
Along with the development of science and technology, electronic temperature controller has been widely used in the middle of daily commercial production, uses
In the temperature of production equipment, environment is detected and controls, to improve production efficiency and product quality.So
And, the signal processing system that existing electronic temperature controller is used exists inaccurate to signal processing, easily
There is the problem of distortion in the waveform making signal, causes electronic temperature controller to control not accurate enough, seriously to temperature
Have impact on its control accuracy to temperature.
The electronic temperature controller signal processing system of signal processing accuracy can be improved just therefore it provides a kind of
It it is the task of top priority.
Summary of the invention
It is an object of the invention to the signal processing system overcoming electronic temperature controller of the prior art to be used
There is defect inaccurate to signal processing, it is provided that a kind of based on differential signal translation circuit electronic type temperature
Control device signal processing system.
The present invention is achieved through the following technical solutions: electronic temperature controller based on differential signal translation circuit
By signal processing system, mainly by processing chip U, with the CF pin processing chip U after positive electrode resistance R6
Be connected, negative pole after resistance R11 with the polar capacitor C4 that is connected of CM pin processing chip U, with
Process the advance signal amplifying circuit that the IN pin of chip U is connected, the arteries and veins being connected with process chip U
Rush shaping circuit, the data signal being connected respectively with the CM pin processing chip U and pulse shaper
Output circuit, and the differential signal conversion being serially connected between pulse shaper and data signal output circuit
Circuit forms；The VS pin of described process chip U connects external power source.
Described differential signal translation circuit is by amplifier P4, audion VT3, and audion VT4, positive pole is through electricity
Resistance R19 after be connected with the positive pole of amplifier P4, negative pole as differential signal translation circuit input and and arteries and veins
Rush polar capacitor C10, P pole that shaping circuit is connected after resistance R20 with the positive pole of polar capacitor C10
Be connected, diode D6 that N pole negative pole with amplifier P4 after resistance R21 is connected, positive pole and two
The polarity that the N pole of pole pipe D6 is connected, negative pole base stage with audion VT4 after resistance R24 is connected
Electric capacity C11, negative pole is connected with the base stage of audion VT3, positive pole after resistance R22 with amplifier P4
The polar capacitor C12 that is connected of negative pole, positive pole outfan with amplifier P4 after resistance R23 is connected,
Polar capacitor C13, the P pole that negative pole colelctor electrode with audion VT3 after resistance R25 is connected is through resistance
After R26 the colelctor electrode with audion VT3 be connected, the diode D7 of N pole ground connection, and one end and three poles
The resistance R27 composition that the colelctor electrode of pipe VT3 is connected, the other end is connected with the N pole of diode D7；
The positive pole of described polar capacitor C13 is connected with the emitter stage of audion VT3；The collection of described audion VT4
Electrode ground connection, its emitter stage are connected with the colelctor electrode of audion VT3；The negative pole of described polar capacitor C13
As the outfan of differential signal translation circuit and it is connected with data signal output circuit.
Described advance signal amplifying circuit is by amplifier P1, and positive pole is connected with the positive pole of amplifier P1, negative pole
As the polar capacitor C11 of the input of advance signal amplifying circuit, negative pole after resistance R1 with amplifier P1
Negative pole be connected, positive pole is sequentially connected through resistance R3 outfan with amplifier P1 after resistance R4
Polar capacitor C2, P pole negative pole with polar capacitor C2 after resistance R2 is connected, N pole and resistance R3
The diode D1 being connected with the junction point of resistance R4, and positive pole after resistance R5 with amplifier P1's
Outfan is connected, the polar capacitor C3 of minus earth composition；The outfan of described amplifier P1 is as front
Put the outfan of signal amplification circuit and be connected with the IN pin processing chip U.
Described pulse shaper by audion VT1, audion VT2, N pole after resistance R8 with audion
Two poles that the colelctor electrode of VT1 is connected, P pole is connected with the CC pin processing chip U after resistance R7
Pipe D2, negative pole is connected with the base stage of audion VT1, positive pole is connected with the COM pin of process chip U
The polar capacitor C5 connect, negative pole is connected with the emitter stage of audion VT2, positive pole after resistance R9 with place
The polar capacitor C6 that is connected of OUT pin of reason chip U, one end is connected with the positive pole of polar capacitor C6,
Resistance R10, the P pole that the other end is connected with the PWM pin processing chip U is after adjustable resistance R15
Be connected with the colelctor electrode of audion VT2, N pole is collectively forming shaping pulse with the emitter stage of audion VT2
The outfan of circuit the diode D5 being connected with data signal output circuit, and negative pole is after inductance L
Be connected with the colelctor electrode of audion VT1, positive pole P pole with diode D5 after resistance R16 is connected
Polar capacitor C9 composition；The emitter stage of described audion VT2 is connected with the negative pole of polar capacitor C10,
Its base stage is connected with the emitter stage of audion VT1.
Described data signal output circuit by amplifier P2, amplifier P3, P pole after resistance R14 with amplification
The diode D3 that the positive pole of device P2 is connected, N pole positive pole with amplifier P3 after resistance R12 is connected,
Negative pole N pole with diode D3 after resistance R13 is connected, after positive electrode resistance R17 with amplifier P2
The outfan polar capacitor C7 that is connected, positive pole is connected with the negative pole of amplifier P3, minus earth
Polar capacitor C8, and P pole is connected with the outfan of amplifier P3, N pole is after adjustable resistance R18
The diode D4 composition being connected with the outfan of amplifier P2；The N pole of described diode D3 and process
The CM pin of chip U is connected；The minus earth of described amplifier P2, its positive pole and polar capacitor C13
Negative pole be connected, its outfan be connected with the N pole of diode D5 after and as data signal output electricity
The outfan on road.
For the practical effect of the present invention, described process chip U the most preferentially uses the integrated chip of AD736
Realize.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) small-signal of temperature sensor output can be amplified by the present invention, and the present invention can make defeated
Go out signal and keep consistent with the waveform of input signal, improve the present invention accuracy to signal processing, effectively
Ensure that signal output waveform does not haves distortion.
(2) amplitude of signal and frequency plot can be adjusted by the present invention, make signal more stable, thus really
Protect the present invention can signal be processed accurately, effectively prevent signal waveform from distortion occurring.
(3) input signal can be converted to high-frequency signal or the low frequency signal of specific width by the present invention, makes signal
Signal wave more steady, thus improve the present invention accuracy to signal processing.
(4) the process chip of the present invention uses the integrated chip of AD736 to realize, and this process chip has stronger
Capacity of resisting disturbance, thus effectively ensure that the present invention accuracy to signal processing.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the differential signal translation circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is described in further detail, but the enforcement of the present invention
Mode is not limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by processing chip U, with process chip U's after positive electrode resistance R6
The polar capacitor that CF pin is connected, negative pole is connected with the CM pin processing chip U after resistance R11
C4, the advance signal amplifying circuit being connected with the IN pin processing chip U, it is connected with processing chip U
The pulse shaper connect, the number being connected with the CM pin processing chip U and pulse shaper respectively
According to signal output apparatus, and the difference letter being serially connected between pulse shaper and data signal output circuit
Number translation circuit composition；The VS pin of described process chip U connects external power source.
Wherein, described advance signal amplifying circuit by amplifier P1, resistance R1, resistance R2, resistance R3,
Resistance R4, resistance R5, polar capacitor C1, polar capacitor C2, polar capacitor C3, and diode D1
Composition.
During connection, the positive pole of polar capacitor C11 is connected with the positive pole of amplifier P1, its negative pole is as preposition
The input of signal amplification circuit is also connected with temperature sensor.The negative pole of polar capacitor C2 is through resistance R1
Afterwards the negative pole with amplifier P1 be connected, its positive pole sequentially after resistance R3 and resistance R4 with amplifier P1
Outfan be connected.The P pole of diode D1 negative pole with polar capacitor C2 after resistance R2 is connected,
Its N pole is connected with the junction point of resistance R3 with resistance R4.The positive pole of polar capacitor C3 is through resistance R5
Afterwards the outfan with amplifier P1 be connected, its minus earth.The outfan of described amplifier P1 is as front
Put the outfan of signal amplification circuit and be connected with the IN pin processing chip U.
Further, described pulse shaper is by audion VT1, audion VT2, resistance R7, resistance
R8, resistance R9, resistance R10, adjustable resistance R15, resistance R16, polar capacitor C5, polar capacitor
C6, polar capacitor C9, diode D2, diode D5, and inductance L form.
During connection, the N pole of diode D2 colelctor electrode with audion VT1 after resistance R8 is connected,
Its P pole is connected with the CC pin processing chip U after resistance R7.The negative pole of polar capacitor C5 and three
The base stage of pole pipe VT1 is connected, its positive pole is connected with the COM pin processing chip U.Polar capacitor
The negative pole of C6 is connected with the emitter stage of audion VT2, its positive pole after resistance R9 with process chip U
OUT pin is connected.One end of resistance R10 is connected with the positive pole of polar capacitor C6, its other end with
The PWM pin processing chip U is connected.
Meanwhile, the P pole of diode D5 colelctor electrode with audion VT2 after adjustable resistance R15 be connected,
Its N pole and the emitter stage of audion VT2 are collectively forming the outfan of pulse shaper defeated with data signal
Go out circuit to be connected.The negative pole of polar capacitor C9 colelctor electrode with audion VT1 after inductance L is connected,
Its positive pole P pole with diode D5 after resistance R16 is connected.The emitter stage of described audion VT2 with
The negative pole of polar capacitor C10 is connected, its base stage is connected with the emitter stage of audion VT1.
Further, described data signal output circuit by amplifier P2, amplifier P3, resistance R12,
Resistance R13, resistance R14, resistance R17, adjustable resistance R18, polar capacitor C7, polar capacitor C8,
Diode D3, and diode D4 composition.
During connection, the P pole of diode D3 positive pole with amplifier P2 after resistance R14 is connected, its N
Pole positive pole with amplifier P3 after resistance R12 is connected.The negative pole of polar capacitor C7 is after resistance R13
It is connected with the N pole of diode D3, is connected with the outfan of amplifier P2 after its positive electrode resistance R17.
The positive pole of polar capacitor C8 is connected with the negative pole of amplifier P3, its minus earth.The P of diode D4
Pole is connected with the outfan of amplifier P3, its N pole after adjustable resistance R18 with the output of amplifier P2
End is connected.
The N pole of described diode D3 is connected with the CM pin processing chip U；Described amplifier P2's
Minus earth, its positive pole are connected with the negative pole of polar capacitor C13, the N of its outfan and diode D5
After pole is connected and as the outfan of data signal output circuit.
As in figure 2 it is shown, described differential signal translation circuit is by amplifier P4, audion VT3, audion VT4,
Resistance R19, resistance R20, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25,
Resistance R26, resistance R27, polar capacitor C10, polar capacitor C11, polar capacitor C12, polar capacitor
C13, diode D6, and diode D7 form.
During connection, the positive pole of polar capacitor C10 positive pole with amplifier P4 after resistance R19 is connected, it
Negative pole as differential signal translation circuit input and is connected with pulse shaper.The P pole of diode D6
After resistance R20 the positive pole with polar capacitor C10 be connected, its N pole after resistance R21 with amplifier
The negative pole of P4 is connected.The positive pole of polar capacitor C11 is connected with the N pole of diode D6, its negative pole warp
After resistance R24, the base stage with audion VT4 is connected.
Meanwhile, the negative pole of polar capacitor C12 is connected with the base stage of audion VT3, its positive pole is through resistance R22
Negative pole with amplifier P4 is connected afterwards.The positive pole of polar capacitor C13 after resistance R23 with amplifier P4
Outfan be connected, its negative pole colelctor electrode with audion VT3 after resistance R25 is connected.Diode
The P pole of D7 colelctor electrode with audion VT3 after resistance R26 is connected, its N pole ground connection.Resistance R27
One end be connected with the colelctor electrode of audion VT3, its other end is connected with the N pole of diode D7.
The positive pole of described polar capacitor C13 is connected with the emitter stage of audion VT3；Described audion VT4
Grounded collector, its emitter stage is connected with the colelctor electrode of audion VT3；Described polar capacitor C13's
Negative pole as the outfan of differential signal translation circuit and is connected with data signal output circuit.
During operation, the small-signal of temperature sensor output can be amplified by the present invention, and energy of the present invention
Make output signal and the waveform of input signal keep consistent, thus improve accurate to signal processing of the present invention
Property, effectively ensure that signal output waveform does not haves distortion.
Meanwhile, the amplitude of signal and frequency plot can be adjusted by the present invention, make signal more stable, thus
Ensure that signal can be processed by the present invention accurately, effectively prevent signal waveform from distortion occurring.This
Bright high-frequency signal or the low frequency signal that input signal can be converted to specific width, the signal wave making signal is more flat
Surely, thus improve the present invention accuracy to signal processing.The process chip of the present invention uses AD736 collection
Becoming chip to realize, this process chip has stronger capacity of resisting disturbance, thus effectively ensure that the present invention
Accuracy to signal processing.
According to above-described embodiment, can well realize the present invention.
Claims (6)
1. electronic temperature controller signal processing system based on differential signal translation circuit, it is characterised in that
Mainly by processing chip U, it is connected with the CF pin processing chip U after positive electrode resistance R6, negative pole is through electricity
The polar capacitor C4 being connected with the CM pin processing chip U after resistance R11, with the IN processing chip U
The advance signal amplifying circuit that pin is connected, the pulse shaper being connected with process chip U, respectively
The data signal output circuit being connected with the CM pin processing chip U and pulse shaper, and string
The differential signal translation circuit composition being connected between pulse shaper and data signal output circuit；Described place
The VS pin of reason chip U connects external power source.
Electronic temperature controller signal based on differential signal translation circuit the most according to claim 1
Processing system, it is characterised in that described differential signal translation circuit is by amplifier P4, audion VT3, three
Pole pipe VT4, positive pole positive pole with amplifier P4 after resistance R19 is connected, negative pole becomes as differential signal
Change circuit input end polar capacitor C10, the P pole that is connected with pulse shaper after resistance R20 with pole
Two poles that the positive pole of property electric capacity C10 is connected, N pole negative pole with amplifier P4 after resistance R21 is connected
Pipe D6, positive pole is connected with the N pole of diode D6, negative pole after resistance R24 with the base of audion VT4
The polar capacitor C11 that pole is connected, negative pole is connected with the base stage of audion VT3, positive pole is through resistance R22
The polar capacitor C12 that negative pole with amplifier P4 is connected afterwards, positive pole after resistance R23 with amplifier P4
The polar capacitor that outfan is connected, negative pole colelctor electrode with audion VT3 after resistance R25 is connected
C13, P pole colelctor electrode with audion VT3 after resistance R26 is connected, the diode D7 of N pole ground connection,
And one end is connected with the colelctor electrode of audion VT3, the other end is connected with the N pole of diode D7
Resistance R27 forms；The positive pole of described polar capacitor C13 is connected with the emitter stage of audion VT3；Described
The grounded collector of audion VT4, its emitter stage are connected with the colelctor electrode of audion VT3；Described polarity
The negative pole of electric capacity C13 as the outfan of differential signal translation circuit and is connected with data signal output circuit.
Electronic temperature controller signal based on differential signal translation circuit the most according to claim 2
Processing system, it is characterised in that described advance signal amplifying circuit is by amplifier P1, positive pole and amplifier P1
Positive pole be connected, negative pole as the polar capacitor C11 of the input of advance signal amplifying circuit, negative pole is through electricity
Resistance R1 after be connected with the negative pole of amplifier P1, positive pole sequentially after resistance R3 and resistance R4 with amplifier
Polar capacitor C2, the P pole that the outfan of P1 is connected negative pole with polar capacitor C2 after resistance R2 is connected
Connect, diode D1 that N pole is connected with the junction point of resistance R3 with resistance R4, and positive pole is through resistance
After R5, the outfan with amplifier P1 is connected, the polar capacitor C3 of minus earth forms；Described amplifier
The outfan of P1 as the outfan of advance signal amplifying circuit and is connected with the IN pin processing chip U.
Electronic temperature controller signal based on differential signal translation circuit the most according to claim 3
Processing system, it is characterised in that described pulse shaper is by audion VT1, audion VT2, N pole
After resistance R8 the colelctor electrode with audion VT1 be connected, P pole after resistance R7 with process chip U
The diode D2 that CC pin is connected, negative pole is connected with the base stage of audion VT1, positive pole and process core
The polar capacitor C5 that the COM pin of sheet U is connected, negative pole is connected with the emitter stage of audion VT2,
The polar capacitor C6 that positive pole is connected with the OUT pin processing chip U after resistance R9, one end and polarity
The resistance R10 that the positive pole of electric capacity C6 is connected, the other end is connected with the PWM pin of process chip U,
P pole colelctor electrode with audion VT2 after adjustable resistance R15 is connected, N pole is sent out with audion VT2's
Outfan that emitter-base bandgap grading is collectively forming pulse shaper the diode being connected with data signal output circuit
D5, and negative pole colelctor electrode with audion VT1 after inductance L is connected, positive pole after resistance R16 with
The polar capacitor C9 composition that the P pole of diode D5 is connected；The emitter stage of described audion VT2 and polarity
The negative pole of electric capacity C10 is connected, its base stage is connected with the emitter stage of audion VT1.
Electronic temperature controller signal based on differential signal translation circuit the most according to claim 4
Processing system, it is characterised in that described data signal output circuit is by amplifier P2, amplifier P3, P pole
After resistance R14 the positive pole with amplifier P2 be connected, N pole after resistance R12 with amplifier P3 just
The diode D3 that pole is connected, negative pole N pole with diode D3 after resistance R13 is connected, positive electrical
The polar capacitor C7 being connected with the outfan of amplifier P2 after resistance R17, positive pole and the negative pole of amplifier P3
Be connected, the polar capacitor C8 of minus earth, and P pole is connected with the outfan of amplifier P3, N
The diode D4 composition that pole outfan with amplifier P2 after adjustable resistance R18 is connected；Described two poles
The N pole of pipe D3 is connected with the CM pin processing chip U；The minus earth of described amplifier P2, its
After positive pole is connected with the negative pole of polar capacitor C13, its outfan is connected with the N pole of diode D5 also
Outfan as data signal output circuit.
Electronic temperature controller signal based on differential signal translation circuit the most according to claim 5
Processing system, it is characterised in that described process chip U is the integrated chip of AD736.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610451608.5A CN105974955A (en) | 2016-06-21 | 2016-06-21 | Signal processing system for electronic temperature controller based on differential signal conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610451608.5A CN105974955A (en) | 2016-06-21 | 2016-06-21 | Signal processing system for electronic temperature controller based on differential signal conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105974955A true CN105974955A (en) | 2016-09-28 |
Family
ID=57022094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610451608.5A Pending CN105974955A (en) | 2016-06-21 | 2016-06-21 | Signal processing system for electronic temperature controller based on differential signal conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105974955A (en) |
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2016
- 2016-06-21 CN CN201610451608.5A patent/CN105974955A/en active Pending
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160928 |
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| WD01 | Invention patent application deemed withdrawn after publication |