CN106054969A - Automatic signal filtering type constant temperature control system based on phase lock circuit - Google Patents
Automatic signal filtering type constant temperature control system based on phase lock circuit Download PDFInfo
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- CN106054969A CN106054969A CN201610545630.6A CN201610545630A CN106054969A CN 106054969 A CN106054969 A CN 106054969A CN 201610545630 A CN201610545630 A CN 201610545630A CN 106054969 A CN106054969 A CN 106054969A
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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
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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Abstract
The invention discloses an automatic signal filtering type constant temperature control system based on a phase lock circuit. The control system is characterized by mainly comprising a control chip U, a temperature sensor Q, and a diode D3, wherein a P electrode of the diode D3 is connected with an IS pin of the control chip U, and an N electrode of the diode D3 is separately connected with a DC pin and an SC pin of the control chip U through a resistor R5. According to the control system, a signal phase can be locked to prevent fluctuation, and stability is improved. The control system is advantaged in that an interference signal doped in a temperature signal can be filtered, influence of the interference signal can be eliminated, and temperature control precision is greatly improved.
Description
Technical field
The present invention relates to a kind of automatic control system, specifically refer to a kind of signal filtering type constant temperature based on phase lock circuitry certainly
Autocontrol system.
Background technology
In industrial processes, many times it is required for the temperature of production environment is controlled, keeps the temperature at
Constant scope, thus improve the quality of production efficiency and product.Along with the raising of industrial automation, the most generally use constant temperature
Temperature is controlled by automatic control system.But, the existing constant-temperature automatic control system temperature detection to production environment
Not accurate enough, cause it relatively big to temperature controlled error, do not reach thermostatically controlled standard, it is impossible to meet Production requirement.
Summary of the invention
It is an object of the invention to solve current constant-temperature automatic control system and temperature controlled the defect that error is big, it is provided that
A kind of signal filtering type constant-temperature automatic control system based on phase lock circuitry.
The purpose of the present invention is by following technical proposals reality: a kind of signal filtering type constant temperature based on phase lock circuitry is automatic
Control system, mainly by control chip U, temperature sensor Q, P pole is connected with the IS pin of control chip U, N pole is through resistance R5
The rear diode D3 being connected with DC pin and the SC pin of control chip U respectively, positive pole is connected with the TC pin of control chip U
Connect, the electric capacity C2 of minus earth, the bandwidth-limited circuit being connected with temperature sensor Q, be connected with bandwidth-limited circuit
Signal amplification circuit, the phase lock circuitry being connected with the IN pin of control chip U, and be connected with the SE pin of control chip U
The temperature-control circuit composition connect；Described phase lock circuitry is all connected with signal amplification circuit with the negative pole of electric capacity C2.
Further, described bandwidth-limited circuit is connected with the positive pole of amplifier P4 by amplifier P4, amplifier P5, negative pole
Connect, electric capacity C7 that positive pole is connected with sensor Q after resistance R11, positive pole is connected with the positive pole of electric capacity C7, negative pole and amplification
Two poles that electric capacity C8, P pole ground connection that the outfan of device P4 is connected, N pole negative pole with amplifier P4 after resistance R12 is connected
Pipe D7, the resistance R13 being serially connected between the outfan of amplifier P4 and the P pole of diode D7, be serially connected in the output of amplifier P4
Resistance R14 between end and the positive pole of amplifier P5, one end is connected with the negative pole of amplifier P5, other end earth resistance R15,
The electric capacity C9 that negative pole is connected with the positive pole of amplifier P5, positive pole is connected with the outfan of amplifier P5, and positive pole with put
The electric capacity C10 that outfan is connected, negative pole is connected with the signal amplification circuit composition of big device P5.
Described phase lock circuitry is connected with the positive pole of amplifier P3 by amplifier P3, audion VT1, audion VT2, one end
Connect, resistance R7 that the other end is connected with signal amplification circuit, be serially connected in the resistance between positive pole and the outfan of amplifier P3
R8, positive pole is connected with the positive pole of amplifier P3, the electric capacity C5 of minus earth, is serially connected in negative pole and the audion of amplifier P3
Resistance R9, P pole between the emitter stage of VT1 is connected with the colelctor electrode of audion VT1, N pole is connected with the base stage of audion VT2
The diode D5 connect, the electric capacity that negative pole is connected with the colelctor electrode of audion VT1, positive pole is connected with the base stage of audion VT2
C6, and N pole emitter stage with audion VT2 after resistance R10 is connected, P pole is connected with the emitter stage of audion VT1
The diode D6 composition of ground connection simultaneously；The base stage of described audion VT1 is connected with the outfan of amplifier P3；Described audion
The colelctor electrode of VT2 is connected with the IN pin of control chip U.
Described signal amplification circuit is connected with the positive pole of amplifier P1 by audion VT, amplifier P1, amplifier P2, N pole
Connect, diode D1 that P pole base stage with audion VT after resistance R1 is connected, one end is connected with the positive pole of amplifier P1,
The resistance R2 of another termination 12V voltage, is serially connected in resistance R4, the N pole between positive pole and the outfan of amplifier P1 and amplifier
The diode D2 that the positive pole of P1 is connected, P pole is connected with the base stage of audion VT, negative pole is connected with the base stage of audion VT
Connect, electric capacity C1 that positive pole is connected with the negative pole of amplifier P2, and be serially connected in the emitter stage of audion VT and amplifier P2
Resistance R3 composition between negative pole；The base stage of described audion VT is connected with the negative pole of electric capacity C10, its colelctor electrode and amplifier
The negative pole of P1 is connected, its emitter stage then positive pole with amplifier P2 is connected；The minus earth of described amplifier P2, its output
End is connected with the negative pole of electric capacity C2；The outfan of described amplifier P1 positive pole with amplifier P3 after resistance R7 is connected.
Described temperature-control circuit is connected with the SE pin of control chip U by P pole, N pole is after resistance R6 the two of ground connection
Pole pipe D4, the electric capacity C3 that negative pole is connected with the SE pin of control chip U, positive pole is connected with the N pole of diode D4, and negative
The electric capacity that N pole with diode D4 after resistance R6, pole is connected, be connected with the N pole of diode D4 after positive pole heated silk EH
C4 forms.
Described control chip U is the integrated chip of MC34063.
The present invention compared with prior art has the following advantages and beneficial effect:
(1) temperature signal of temperature sensor output can be processed by the present invention, enables control chip U more preferable
Reference signal internal with it for temperature signal is compared, and determines tested to as current temperature conditions accurately, from
And control heating wire works more accurately, improve the temperature control precision of the present invention.
(2) phase place of signal can be locked by the present invention, and fluctuation occurs in the phase place of anti-stop signal, improves the present invention
Stability.
(3) the interference signal being entrained in temperature signal can be filtered by the present invention, the impact excluded the interference signal,
Greatly improve the temperature control precision of the present invention.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the structure chart of the phase lock circuitry of the present invention.
Fig. 3 is the structure chart of the bandwidth-limited circuit 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 limited to
This.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U, the IS pin phase of temperature sensor Q, P pole and control chip U
The diode D3 that connection, N pole are connected with DC pin and the SC pin of control chip U after resistance R5 respectively, positive pole and control
The TC pin of chip U is connected, the electric capacity C2 of minus earth, the bandwidth-limited circuit being connected with temperature sensor Q, logical with band
The signal amplification circuit that filter circuit is connected, the phase lock circuitry being connected with the IN pin of control chip U, and with control core
The temperature-control circuit composition that the SE pin of sheet U is connected；The negative pole of described phase lock circuitry and electric capacity C2 all amplifies electricity with signal
Road is connected.In order to preferably implement the present invention, the described control chip U integrated chip of preferred MC34063 realizes.
Wherein, described signal amplification circuit is by audion VT, amplifier P1, amplifier P2, resistance R1, resistance R2, resistance
R3, resistance R4, electric capacity C1, diode D1 and diode D2 form.
During connection, the N pole of diode D1 is connected with the positive pole of amplifier P1, its P pole after resistance R1 with audion VT
Base stage be connected.One end of resistance R2 is connected with the positive pole of amplifier P1, its another termination 12V voltage.Resistance R4 concatenates
Between the positive pole and outfan of amplifier P1.The N pole of diode D2 is connected with the positive pole of amplifier P1, its P pole and three poles
The base stage of pipe VT is connected.The negative pole of electric capacity C1 is connected with the base stage of audion VT, the negative pole phase of its positive pole and amplifier P2
Connect.Resistance R3 is serially connected between the emitter stage of audion VT and the negative pole of amplifier P2.
Meanwhile, the base stage of described audion VT be connected with bandwidth-limited circuit, the negative pole of its colelctor electrode and amplifier P1
Be connected, its emitter stage then positive pole with amplifier P2 is connected.The minus earth of described amplifier P2, its outfan and electric capacity
The negative pole of C2 is connected.The outfan of described amplifier P1 is connected with phase lock circuitry.
It addition, described temperature-control circuit is made up of diode D4, electric capacity C3, electric capacity C4, resistance R6 and heater strip EH.
During connection, the P pole of diode D4 is connected with the SE pin of control chip U, its N pole ground connection after resistance R6.Electric capacity C3's is negative
Pole is connected with the SE pin of control chip U, its positive pole is connected with the N pole of diode D4.The negative pole of electric capacity C4 is through resistance R6
It is connected with the N pole of diode D4 afterwards, is connected with the N pole of diode D4 after its positive pole heated silk EH.
As in figure 2 it is shown, described phase lock circuitry is by amplifier P3, audion VT1, audion VT2, resistance R7, resistance R8, electricity
Resistance R9, resistance R10, electric capacity C5, electric capacity C6, diode D5 and diode D6 composition.
During connection, one end of resistance R7 is connected with the positive pole of amplifier P3, the outfan of its other end and amplifier P1
It is connected.Resistance R8 is serially connected between positive pole and the outfan of amplifier P3.The positive pole phase of the positive pole of electric capacity C5 and amplifier P3
Connection, its minus earth.Resistance R9 is serially connected between the negative pole of amplifier P3 and the emitter stage of audion VT1.The P of diode D5
Pole is connected with the colelctor electrode of audion VT1, its N pole is connected with the base stage of audion VT2.The negative pole of electric capacity C6 and audion
The colelctor electrode of VT1 is connected, its positive pole is connected with the base stage of audion VT2.The N pole of diode D6 after resistance R10 with three
Ground connection while the emitter stage of pole pipe VT2 is connected, its P pole is connected with the emitter stage of audion VT1.Described audion VT1
Base stage be connected with the outfan of amplifier P3.The colelctor electrode of described audion VT2 is connected with the IN pin of control chip U
Connect.
As it is shown on figure 3, described bandwidth-limited circuit is by amplifier P4, amplifier P5, resistance R11, resistance R12, resistance
R13, resistance R14, resistance R15, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10 and diode D7 form.
During connection, the negative pole of electric capacity C7 is connected with the positive pole of amplifier P4, its positive pole after resistance R11 with sensor Q
It is connected.The positive pole of electric capacity C8 is connected with the positive pole of electric capacity C7, its negative pole is connected with the outfan of amplifier P4.Diode
The P pole ground connection of D7, its N pole negative pole with amplifier P4 after resistance R12 is connected.Resistance R13 is serially connected in the defeated of amplifier P4
Go out between end and the P pole of diode D7.Resistance R14 is serially connected between the outfan of amplifier P4 and the positive pole of amplifier P5.Electricity
One end of resistance R15 is connected with the negative pole of amplifier P5, its other end ground connection.The positive pole phase of the negative pole of electric capacity C9 and amplifier P5
Connect, its positive pole is connected with the outfan of amplifier P5.Positive pole is connected with the outfan of amplifier P5, negative pole and audion
The electric capacity C10 composition that the base stage of VT is connected.
During work, temperature sensor Q uses the tested temperature signal to picture and exports to subsequent conditioning circuit, this temperature signal warp
Inputting after crossing process in control chip U, reference signal internal with it for temperature signal is compared and determines by control chip U
Whether Current Temperatures is in the range of design temperature, and when temperature is less than design temperature, control chip adjusts the output of its SE pin
Pulse width, thus adjust and be added in the voltage on heater strip EH, the heating power of regulation heater strip, make the temperature of production environment
Reach the scope set, thus realize thermostatically controlled purpose.
The phase place of signal can be locked by the present invention, and fluctuation occurs in the phase place of anti-stop signal, improves the present invention's
Stability.The interference signal being entrained in temperature signal can be filtered by the present invention, the impact excluded the interference signal, greatly
The temperature control precision that improve the present invention.
As it has been described above, just can well realize the present invention.
Claims (6)
1. a signal filtering type constant-temperature automatic control system based on phase lock circuitry, it is characterised in that: main by control chip
U, temperature sensor Q, P pole is connected with the IS pin of control chip U, N pole is managed with the DC of control chip U after resistance R5 respectively
The diode D3 that foot is connected with SC pin, positive pole is connected with the TC pin of control chip U, the electric capacity C2 of minus earth, with
The bandwidth-limited circuit that temperature sensor Q is connected, the signal amplification circuit being connected with bandwidth-limited circuit, with control chip
The phase lock circuitry that the IN pin of U is connected, and the temperature-control circuit composition being connected with the SE pin of control chip U；Institute
State phase lock circuitry to be all connected with signal amplification circuit with the negative pole of electric capacity C2.
A kind of signal filtering type constant-temperature automatic control system based on phase lock circuitry the most according to claim 1, its feature
It is: described bandwidth-limited circuit is by amplifier P4, amplifier P5, and negative pole is connected with the positive pole of amplifier P4, positive pole is through electricity
The electric capacity C7 that is connected with sensor Q after resistance R11, positive pole is connected with the positive pole of electric capacity C7, negative pole and the output of amplifier P4
Hold the diode D7 that electric capacity C8, the P pole ground connection being connected, the N pole negative pole with amplifier P4 after resistance R12 is connected, concatenation
Resistance R13 between the outfan and the P pole of diode D7 of amplifier P4, is serially connected in outfan and the amplifier of amplifier P4
Resistance R14 between the positive pole of P5, one end is connected with the negative pole of amplifier P5, other end earth resistance R15, negative pole and amplification
The electric capacity C9 that the positive pole of device P5 is connected, positive pole is connected with the outfan of amplifier P5, and positive pole and amplifier P5's is defeated
Go out the electric capacity C10 composition that end is connected, negative pole is connected with signal amplification circuit.
A kind of signal filtering type constant-temperature automatic control system based on phase lock circuitry the most according to claim 2, its feature
It is: described phase lock circuitry is connected with the positive pole of amplifier P3, separately by amplifier P3, audion VT1, audion VT2, one end
The resistance R7 that one end is connected with signal amplification circuit, is serially connected in the resistance R8 between positive pole and the outfan of amplifier P3, just
Pole is connected with the positive pole of amplifier P3, the electric capacity C5 of minus earth, is serially connected in the negative pole of amplifier P3 and sending out of audion VT1
Resistance R9, P pole between emitter-base bandgap grading is connected with the colelctor electrode of audion VT1, N pole is connected with the base stage of audion VT2 two
Pole pipe D5, the electric capacity C6 that negative pole is connected with the colelctor electrode of audion VT1, positive pole is connected with the base stage of audion VT2, and
N pole emitter stage with audion VT2 after resistance R10 is connected, P pole connects while being connected with the emitter stage of audion VT1
The diode D6 composition on ground；The base stage of described audion VT1 is connected with the outfan of amplifier P3；Described audion VT2's
Colelctor electrode is connected with the IN pin of control chip U.
A kind of signal filtering type constant-temperature automatic control system based on phase lock circuitry the most according to claim 3, its feature
It is: described signal amplification circuit is by audion VT, amplifier P1, and amplifier P2, N pole is connected with the positive pole of amplifier P1, P
The diode D1 that pole base stage with audion VT after resistance R1 is connected, one end is connected with the positive pole of amplifier P1, another
The resistance R2 of termination 12V voltage, resistance R4, the N pole being serially connected between positive pole and the outfan of amplifier P1 is with amplifier P1's
The diode D2 that positive pole is connected, P pole is connected with the base stage of audion VT, negative pole is connected with the base stage of audion VT, just
The electric capacity C1 that pole is connected with the negative pole of amplifier P2, and be serially connected in the emitter stage of audion VT and amplifier P2 negative pole it
Between resistance R3 composition；The base stage of described audion VT is connected with the negative pole of electric capacity C10, its colelctor electrode is negative with amplifier P1's
Pole is connected, its emitter stage then positive pole with amplifier P2 is connected；The minus earth of described amplifier P2, its outfan and electricity
The negative pole holding C2 is connected；The outfan of described amplifier P1 positive pole with amplifier P3 after resistance R7 is connected.
A kind of signal filtering type constant-temperature automatic control system based on phase lock circuitry the most according to claim 4, its feature
It is: described temperature-control circuit is connected with the SE pin of control chip U by P pole, N pole diode of ground connection after resistance R6
D4, the electric capacity C3 that negative pole is connected with the SE pin of control chip U, positive pole is connected with the N pole of diode D4, and negative pole warp
The electric capacity C4 group that after resistance R6, the N pole with diode D4 is connected, is connected with the N pole of diode D4 after positive pole heated silk EH
Become.
A kind of signal filtering type constant-temperature automatic control system based on phase lock circuitry the most according to claim 5, its feature
It is: described control chip U is the integrated chip of MC34063.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610545630.6A CN106054969A (en) | 2016-07-12 | 2016-07-12 | Automatic signal filtering type constant temperature control system based on phase lock circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610545630.6A CN106054969A (en) | 2016-07-12 | 2016-07-12 | Automatic signal filtering type constant temperature control system based on phase lock circuit |
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| Publication Number | Publication Date |
|---|---|
| CN106054969A true CN106054969A (en) | 2016-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610545630.6A Pending CN106054969A (en) | 2016-07-12 | 2016-07-12 | Automatic signal filtering type constant temperature control system based on phase lock circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110413023A (en) * | 2019-07-24 | 2019-11-05 | 武汉芸禾光电技术有限公司 | A kind of infrared temperature detection feedback system of semiconductor laser |
-
2016
- 2016-07-12 CN CN201610545630.6A patent/CN106054969A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110413023A (en) * | 2019-07-24 | 2019-11-05 | 武汉芸禾光电技术有限公司 | A kind of infrared temperature detection feedback system of semiconductor laser |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161026 |
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| WD01 | Invention patent application deemed withdrawn after publication |