CN105974959A - Electronic temperature controller signal processing system based on low pass filter circuit - Google Patents
Electronic temperature controller signal processing system based on low pass filter circuit Download PDFInfo
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- CN105974959A CN105974959A CN201610457814.7A CN201610457814A CN105974959A CN 105974959 A CN105974959 A CN 105974959A CN 201610457814 A CN201610457814 A CN 201610457814A CN 105974959 A CN105974959 A CN 105974959A
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- pole
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- polar capacitor
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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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/02—Shaping pulses by amplifying
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses an electronic temperature controller signal processing system based on a low pass filter circuit. The system is characterized by mainly comprising a processing chip U, a polarity capacitor C4, a front signal amplification circuit connected with an IN pin of the processing chip U, the low pass filter circuit connected in series between the front signal amplification circuit and the IN pin of the processing chip U, a pulse shaping circuit connected with the processing chip U, and a data signal output circuit separately connected with a CM pin of the processing chip U and the pulse shaping circuit. According to the system, weak signals outputted by a temperature sensor can be amplified, signal processing accuracy is improved, waveforms of output signals and input signals can be made to realize consistency, the waveforms of the output signals are effectively guaranteed to realize no distortion, and thereby an electronic temperature controller is guaranteed to carry out accurate temperature control.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of electronic temperature control based on low-pass filter circuit
Device 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 low-pass filter circuit electronic temperature controller
Use signal processing system.
The present invention is achieved through the following technical solutions: a kind of electronic temperature controller based on low-pass filter 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, be serially connected in the low-pass filtering between advance signal amplifying circuit and the IN pin processing chip U
Circuit, and defeated with the data signal that the CM pin processing chip U and pulse shaper are connected respectively
Go out circuit composition；The VS pin of described process chip U connects external power source.
Described low-pass filter circuit by amplifier P4, audion VT3, positive pole after resistance R19 with amplification
The positive pole of device P4 is connected, negative pole as low-pass filter circuit input and with advance signal amplifying circuit phase
The polar capacitor C10 connected, one end is connected with the negative pole of amplifier P4, the resistance R20 of other end ground connection,
P pole negative pole with amplifier P4 after resistance R21 is connected, N pole is sequentially through resistance R22 and resistance R24
With resistance R24's after the diode D6 that outfan with amplifier P4 is connected afterwards, negative pole and resistance R22
The polar capacitor C13 that junction point is connected, positive pole is connected with the base stage of audion VT3, negative pole is through adjustable
After resistance R23, the negative pole with polar capacitor C13 is connected, positive pole is connected with the P pole of diode D6
Polar capacitor C11, positive pole is connected with the outfan of amplifier P4, the IN of negative pole and process chip U pipe
Polar capacitor C12, the N pole that foot is connected is connected with the negative pole of polar capacitor C12, P pole and audion
The diode D7 that the colelctor electrode of VT3 is connected, and P pole after resistance R26 with polar capacitor C12's
The diode D8 group that negative pole is connected, N pole emitter stage with audion VT3 after resistance R25 is connected
Become；The grounded collector of described audion VT3.
Described advance signal amplifying circuit is by amplifier P1, and positive pole is connected with the positive pole of amplifier P1, bears
Pole as the polar capacitor C11 of the input of advance signal amplifying circuit, negative pole after resistance R1 with amplifier
The negative pole of P1 is connected, positive pole is sequentially connected through resistance R3 outfan with amplifier P1 after resistance R4
Polar capacitor C2, the P pole connect negative pole with polar capacitor C2 after resistance R2 is connected, N pole and resistance
The diode D1 that the junction point of R3 and resistance R4 is connected, and positive pole after resistance R5 with amplifier P1
Outfan be connected, the polar capacitor C3 of minus earth composition；The outfan conduct of described amplifier P1
The outfan of advance signal amplifying circuit is also connected with the negative pole of polar capacitor C10.
Described pulse shaper by audion VT1, audion VT2, N pole after resistance R8 with three poles
The colelctor electrode of pipe VT1 is connected, P pole is connected with the CC pin processing chip U after resistance R7 two
Pole pipe D2, negative pole is connected with the base stage of audion VT1, the COM pin phase of positive pole and process chip U
Connect polar capacitor C5, negative pole is connected with the emitter stage of audion VT2, positive pole after resistance R9 and
Processing the polar capacitor C6 that the OUT pin of chip U is connected, one end is connected with the positive pole of polar capacitor C6
Connect, resistance R10, P pole that the other end is connected with the PWM pin of process chip U is through adjustable resistance R15
Be connected with the colelctor electrode of audion VT2 afterwards, that N pole and the emitter stage of audion VT2 are collectively forming pulse is whole
The outfan of shape circuit the diode D5 being connected with data signal output circuit, and negative pole is through inductance L
Colelctor electrode with audion VT1 is connected afterwards, positive pole P with diode D5 after resistance R16 is extremely connected
The polar capacitor C9 composition connect；The base stage of described audion VT2 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 put
The diode that the positive pole of big device P2 is connected, N pole positive pole with amplifier P3 after resistance R12 is connected
D3, negative pole N pole with diode D3 after resistance R13 is connected, after positive electrode resistance R17 with amplifier
The polar capacitor C7 that the outfan of P2 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 through adjustable resistance R18
The diode D4 composition that outfan with amplifier P2 is connected afterwards；The N pole of described diode D3 and place
The CM pin of reason chip U is connected；The minus earth of described amplifier P2, its positive pole and audion VT2
Emitter stage be connected, its outfan be connected with the N pole of diode D5 after and as data signal export
The outfan of circuit.
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, thus improve the present invention accuracy to signal processing,
Effectively ensure that signal output waveform does not haves distortion.
(2) being mixed by the anti-frequency in input signal of the present invention eliminates, and the present invention can also be by signal
Low-frequency disturbance is rejected, thus improves the present invention accuracy to signal processing, effectively ensure that output letter
Number waveform does not haves distortion.
(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 low-pass filter 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, be serially connected between advance signal amplifying circuit and the IN pin processing chip U is low
Bandpass filter circuit, and the data being connected with the CM pin processing chip U and pulse shaper respectively
Signal output apparatus forms；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 negative pole of polar capacitor C10.
Further, described pulse shaper is by audion VT1, audion VT2, resistance R7, electricity
Resistance R8, resistance R9, resistance R10, adjustable resistance R15, resistance R16, polar capacitor C5, polarity electricity
Hold C6, polar capacitor C9, diode D2, diode D5, and inductance L composition.
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 base stage and three of described audion VT2
The emitter stage of pole pipe VT1 is connected.
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 emitter stage of audion VT2, the N of its outfan and diode D5
After pole is connected and as the outfan of data signal output circuit.
As described in Figure 2, described low-pass filter circuit is by amplifier P4, audion VT3, resistance R19, electricity
Resistance R20, resistance R21, resistance R22, adjustable resistance R23, resistance R24, resistance R25, resistance R26,
Polar capacitor C10, polar capacitor C11, polar capacitor C12, polar capacitor C13, diode D6, two
Pole pipe D7, and diode D8 composition.
During connection, the positive pole of polar capacitor C10 positive pole with amplifier P4 after resistance R19 is connected, it
Negative pole as the input of low-pass filter circuit and is connected with advance signal amplifying circuit.The one of resistance R20
End is connected with the negative pole of amplifier P4, its other end ground connection.The P pole of diode D6 is after resistance R21
Be connected with the negative pole of amplifier P4, its N pole sequentially after resistance R22 and resistance R24 with amplifier P4
Outfan be connected.The negative pole of polar capacitor C13 is connected with junction point with resistance R24 after resistance R22
Connect, its positive pole is connected with the base stage of audion VT3.
Wherein, the negative pole of polar capacitor C11 negative pole with polar capacitor C13 after adjustable resistance R23 is connected
Connect, its positive pole is connected with the P pole of diode D6.The positive pole of polar capacitor C12 is defeated with amplifier P4's
Go out end be connected, its negative pole with process chip U IN pin be connected.
Meanwhile, the N pole of diode D7 be connected with the negative pole of polar capacitor C12, its P pole and audion
The colelctor electrode of VT3 is connected.The P pole of diode D8 after resistance R26 with the negative pole of polar capacitor C12
Be connected, its N pole emitter stage with audion VT3 after resistance R25 is connected.Described audion VT3
Grounded collector.
During operation, the small-signal of temperature sensor output can be amplified by the present invention, and the present invention can make
Output signal keeps consistent with the waveform of input signal, thus improves the present invention accuracy to signal processing,
Effectively ensure that signal output waveform does not haves distortion.
Meanwhile, the present invention can eliminate mixed for the anti-frequency in input signal, and the present invention can also be by signal
Low-frequency disturbance is rejected, thus improves the present invention accuracy to signal processing, effectively ensure that output letter
Number waveform does not haves distortion.Input signal can be converted to high-frequency signal or the low frequency of specific width by the present invention
Signal, the signal wave making signal is more steady, thus improves the present invention accuracy to signal processing.This
Bright process chip 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.
According to above-described embodiment, can well realize the present invention.
Claims (6)
1. an electronic temperature controller signal processing system based on low-pass filter 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, concatenation
Advance signal amplifying circuit and process chip U IN pin between low-pass filter circuit, and respectively with
Process the data signal output circuit composition that the CM pin of chip U is connected with pulse shaper；Described
The VS pin processing chip U connects external power source.
A kind of electronic temperature controller signal based on low-pass filter circuit the most according to claim 1
Processing system, it is characterised in that described low-pass filter circuit is by amplifier P4, audion VT3, positive pole warp
Be connected with the positive pole of amplifier P4 after resistance R19, negative pole is as the input of low-pass filter circuit and with front
Putting the polar capacitor C10 that signal amplification circuit is connected, one end is connected with the negative pole of amplifier P4, another
Resistance R20, P pole negative pole with amplifier P4 after resistance R21 of end ground connection is connected, N pole sequentially warp
The diode D6 being connected with the outfan of amplifier P4 after resistance R22 and resistance R24, negative pole and resistance
The polarity electricity that after R22, the junction point with resistance R24 is connected, positive pole is connected with the base stage of audion VT3
Holding C13, negative pole negative pole with polar capacitor C13 after adjustable resistance R23 is connected, positive pole and diode
The polar capacitor C11 that the P pole of D6 is connected, positive pole is connected with the outfan of amplifier P4, negative pole with
Polar capacitor C12, the N pole that the IN pin of process chip U is connected is connected with the negative pole of polar capacitor C12
Connect, diode D7 that P pole is connected with the colelctor electrode of audion VT3, and P pole after resistance R26 with
The negative pole of polar capacitor C12 is connected, N pole emitter stage with audion VT3 after resistance R25 is connected
Diode D8 composition；The grounded collector of described audion VT3.
A kind of electronic temperature controller signal based on low-pass filter 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 negative pole of polar capacitor C10.
A kind of electronic temperature controller signal based on low-pass filter 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 base stage of described audion VT2 and audion
The emitter stage of VT1 is connected.
A kind of electronic temperature controller signal based on low-pass filter 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 emitter stage of audion VT2, its outfan is connected with the N pole of diode D5 also
Outfan as data signal output circuit.
A kind of electronic temperature controller signal based on low-pass filter 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 |
|---|---|---|---|
| CN201610457814.7A CN105974959A (en) | 2016-06-21 | 2016-06-21 | Electronic temperature controller signal processing system based on low pass filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610457814.7A CN105974959A (en) | 2016-06-21 | 2016-06-21 | Electronic temperature controller signal processing system based on low pass filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105974959A true CN105974959A (en) | 2016-09-28 |
Family
ID=57021741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610457814.7A Pending CN105974959A (en) | 2016-06-21 | 2016-06-21 | Electronic temperature controller signal processing system based on low pass filter circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN105974959A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633450A (en) * | 2018-11-23 | 2019-04-16 | 成都云材智慧数据科技有限公司 | A kind of lithium battery charging detection system neural network based |
-
2016
- 2016-06-21 CN CN201610457814.7A patent/CN105974959A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633450A (en) * | 2018-11-23 | 2019-04-16 | 成都云材智慧数据科技有限公司 | A kind of lithium battery charging detection system neural network based |
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Application publication date: 20160928 |