CN105974966A - Digital temperature controller signal acquisition processing system based on linear filter circuit - Google Patents
Digital temperature controller signal acquisition processing system based on linear filter circuit Download PDFInfo
- Publication number
- CN105974966A CN105974966A CN201610457848.6A CN201610457848A CN105974966A CN 105974966 A CN105974966 A CN 105974966A CN 201610457848 A CN201610457848 A CN 201610457848A CN 105974966 A CN105974966 A CN 105974966A
- Authority
- CN
- China
- Prior art keywords
- amplifier
- pole
- outfan
- resistance
- audion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a digital temperature controller signal acquisition processing system based on a linear filter circuit. The system is characterized by mainly comprising a temperature sensor U, the linear filter circuit connected with the temperature sensor U, and a resistor R1, wherein one end of the resistor R1 is connected with the linear filter circuit, and the other end of the resistor R1 passes through a potentiometer R2 and is then in grounding connection. The system is advantaged in that interference signals of signals can be filtered, so influence of the interference signals can be eliminated, and thereby temperature detection precision of a digital temperature controller can be improved.
Description
Technical field
The present invention relates to domain of control temperature, specifically refer to a kind of digital temperature control based on linear filtering circuit
Device signal acquiring processing 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 based on linear filtering circuit is adopted
Collection processing system.
The purpose of the present invention is achieved through the following technical solutions: purpose digital temperature controller based on linear filtering circuit
With signal acquiring processing system, mainly by temperature sensor U, the linear filter being connected with temperature sensor U
Wave circuit, one end is connected with linear filtering circuit, other end resistance R1 of ground connection after potentiometer R2,
The two-stage amplifying circuit being connected with linear filtering circuit, the feedback being connected with two-stage amplifying circuit respectively electricity
Road and voltage follower circuit, and a termination power, other end ground connection, control end then with two-stage amplifying circuit
The potentiometer R3 composition being connected；Described potentiometer R2 controls end then with resistance R1's and potentiometer R2
Junction point is connected.
Further, described linear filtering electricity routing amplifier P4, amplifier P5, audion VT3, negative pole
After resistance R11, the positive pole with amplifier P4 is connected, positive pole is as the input of this linear filtering circuit
Electric capacity C7, resistance R12, the P pole being serially connected between the negative pole of electric capacity C7 and the negative pole of amplifier P4 and electricity
The negative pole of appearance C7 is connected, the diode D3 of N pole ground connection, is serially connected in N pole and the amplification of diode D3
Resistance R13 between the negative pole of device P5, positive pole is connected with the N pole of diode D3, negative pole and amplifier
The electric capacity C8 that the outfan of P5 is connected, is serially connected in the resistance between positive pole and the outfan of amplifier P4
R14, P pole is connected with the emitter stage of audion VT3, N pole is as the outfan of this linear filtering circuit
Diode D5, N pole is connected with the emitter stage of audion VT3, the outfan phase of P pole and amplifier P5
The diode D4 of ground connection while connection, and it is serially connected in the colelctor electrode of audion VT3 and diode D5
Resistance R15 composition between N pole；The positive pole of described amplifier P5 is connected with its outfan；Described three poles
The base stage of pipe VT3 is connected with the outfan of amplifier P4；The input of described linear filtering circuit and temperature
Sensor U is connected, its outfan the most sequentially ground connection after resistance R1 and potentiometer R2；Described two-stage is put
Big circuit then outfan with linear filtering circuit is connected.
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 the outfan of linear filtering circuit, its outfan is then connected with feedback circuit；Described
The emitter stage of audion VT1 is connected with feedback circuit, its colelctor electrode then negative pole with amplifier P3 is connected；
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.
(3) the interference signal in signal can be filtered by the present invention, eliminates the impact that interference signal brings,
Such that it is able to improve the temperature detecting precision of purpose digital temperature controller.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the structure chart of the linear filtering 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
It is limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by temperature sensor U, linear with what temperature sensor U was connected
Filter circuit, one end is connected with linear filtering circuit, other end resistance R1 of ground connection after potentiometer R2,
The two-stage amplifying circuit being connected with linear filtering circuit, the feedback being connected with two-stage amplifying circuit respectively electricity
Road and voltage follower circuit, and a termination power, other end ground connection, control end then with two-stage amplifying circuit
The potentiometer R3 composition being connected；Described potentiometer R2 controls end then with resistance R1's and potentiometer R2
Junction point is connected.In order to preferably implement the present invention, this temperature sensor U preferred AD590 current mode collection
Becoming temperature sensor to realize, this temperature sensor capacity of resisting disturbance 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 the outfan of linear filtering circuit, its outfan then
It is connected with feedback circuit.The emitter stage of described audion VT1 is connected with feedback circuit, its colelctor electrode then
It is connected with the negative pole of amplifier P3.The outfan of described amplifier P3 respectively with feedback circuit and voltage with
It is connected with circuit.
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.
As in figure 2 it is shown, this linear filtering electricity routing amplifier P4, amplifier P5, audion VT3, resistance
R11, resistance R12, resistance R13, resistance R14, resistance R15, electric capacity C7, electric capacity C8, diode
D3, diode D4 and diode D5 form.
The negative pole of this electric capacity C7 positive pole with amplifier P4 after resistance R11 is connected, its positive pole is as this
The input of linear filtering circuit is also connected with temperature sensor U.Resistance R12 is serially connected in electric capacity C7's
Between the negative pole of negative pole and amplifier P4.The P pole of diode D3 is connected with the negative pole of electric capacity C7, its N
Pole ground connection.Resistance R13 is serially connected between the N pole of diode D3 and the negative pole of amplifier P5.Electric capacity C8
Positive pole be connected with the N pole of diode D3, its negative pole is connected with the outfan of amplifier P5.Resistance
R14 is serially connected between positive pole and the outfan of amplifier P4.The P pole of diode D5 is with audion VT3's
Emitter stage is connected, its N pole is as the outfan of this linear filtering circuit and sequentially through resistance R1 and potentiometer
Ground connection after R2.The N pole of diode D4 is connected with the emitter stage of audion VT3, its P pole and amplifier
The outfan of P5 be connected while ground connection.Resistance R15 is serially connected in colelctor electrode and the diode of audion VT3
Between the N pole of D5.The positive pole of this described amplifier P5 is connected with its outfan.Described audion VT3
Base stage be connected with the outfan of amplifier P4.The outfan of described linear filtering circuit also with amplifier P1
Negative pole be connected.
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.The present invention is permissible
Interference signal in signal is filtered, eliminates the impact that interference signal brings, such that it is able to improve numeral
The temperature detecting precision of formula temperature controller.
As it has been described above, just can well realize the present invention.
Claims (6)
1. purpose digital temperature controller signal acquiring processing system based on linear filtering circuit, it is characterised in that
Mainly by temperature sensor U, the linear filtering circuit being connected with temperature sensor U, one end and linear filter
Wave circuit is connected, other end resistance R1 of ground connection after potentiometer R2, is connected with linear filtering circuit
Two-stage amplifying circuit, the feedback circuit being connected with two-stage amplifying circuit respectively and voltage follower circuit, with
And a termination power, other end ground connection, control the potentiometer R3 composition that end is then connected with two-stage amplifying circuit；
The end junction point then with resistance R1 and potentiometer R2 that controls of described potentiometer R2 is connected.
At purpose digital temperature controller signals collecting based on linear filtering circuit the most according to claim 1
Reason system, it is characterised in that described linear filtering electricity routing amplifier P4, amplifier P5, audion VT3,
Negative pole positive pole with amplifier P4 after resistance R11 is connected, positive pole is as the input of this linear filtering circuit
The electric capacity C7 of end, resistance R12, the P pole being serially connected between the negative pole of electric capacity C7 and the negative pole of amplifier P4
Be connected with the negative pole of electric capacity C7, the diode D3 of N pole ground connection, be serially connected in diode D3 N pole and
Resistance R13 between the negative pole of amplifier P5, positive pole is connected with the N pole of diode D3, negative pole with put
The electric capacity C8 that the outfan of big device P5 is connected, is serially connected in the electricity between positive pole and the outfan of amplifier P4
Resistance R14, P pole is connected with the emitter stage of audion VT3, N pole is as the output of this linear filtering circuit
Diode D5, the N pole of end is connected with the emitter stage of audion VT3, the output of P pole and amplifier P5
Hold the diode D4 of ground connection while being connected, and be serially connected in colelctor electrode and the diode of audion VT3
Resistance R15 composition between the N pole of D5；The positive pole of described amplifier P5 is connected with its outfan；Institute
The outfan of the base stage and amplifier P4 of stating audion VT3 is connected；The input of described linear filtering circuit
Be connected with temperature sensor U, its outfan the most sequentially ground connection after resistance R1 and potentiometer R2；Described
Two-stage amplifying circuit then outfan with linear filtering circuit is connected.
At purpose digital temperature controller signals collecting based on linear filtering circuit the most according to claim 2
Reason system, it is characterised in that described two-stage amplifying circuit by amplifier P1, audion VT1, amplifier P3,
The electric capacity C1 that positive pole is connected with the positive pole of amplifier P1, negative pole is connected with the outfan of amplifier P1,
P pole is connected with the outfan of amplifier P1, N pole base stage with audion VT1 after electric capacity C3 is connected
The diode D1 connect, is serially connected in the resistance R7 between positive pole and the outfan of amplifier P3, and one end with
The resistance R5 composition that the positive pole of amplifier P3 is connected, the other end is then connected with the control end of potentiometer R3；
The negative pole of described amplifier P1 is connected with the outfan of linear filtering circuit, its outfan then with feedback circuit
It is connected；The emitter stage of described audion VT1 is connected with feedback circuit, its colelctor electrode then with amplifier P3
Negative pole be connected；The outfan of described amplifier P3 is connected with feedback circuit and voltage follower circuit respectively.
At purpose digital temperature controller signals collecting based on linear filtering circuit the most according to claim 3
Reason system, it is characterised in that described feedback circuit by amplifier P2, the outfan phase of positive pole and amplifier P1
The electric capacity C2 that connection, negative pole are connected with the outfan of amplifier P2, is serially connected in the outfan of amplifier P2
And the resistance R4 between negative pole, it is serially connected between the positive pole of amplifier P2 and the emitter stage of audion VT1
Resistance R6, and positive pole is connected with the negative pole of amplifier P2, negative pole after resistance R8 with amplifier P3
Outfan be connected electric capacity C4 composition；The minus earth of described electric capacity C4.
At purpose digital temperature controller signals collecting based on linear filtering circuit the most according to claim 4
Reason system, it is characterised in that described voltage follower circuit is by audion VT2, diode D2, one end and two
The N pole of pole pipe D2 is connected, the other end is as the resistance R10 of the outfan of this voltage follower circuit, positive pole
Be connected with the N pole of diode D2, electric capacity C6 that negative pole then colelctor electrode with audion VT2 is connected,
The electric capacity C5 that positive pole is connected with the outfan of amplifier P3, negative pole is connected with the base stage of audion VT2,
And one end is connected with the emitter stage of audion VT2, the resistance R9 of other end ground connection composition.
At purpose digital temperature controller signals collecting based on linear filtering circuit the most according to claim 5
Reason system, it is characterised in that described temperature sensor U is AD590 current mode integrated temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610457848.6A CN105974966A (en) | 2016-06-21 | 2016-06-21 | Digital temperature controller signal acquisition processing system based on linear filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610457848.6A CN105974966A (en) | 2016-06-21 | 2016-06-21 | Digital temperature controller signal acquisition processing system based on linear filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105974966A true CN105974966A (en) | 2016-09-28 |
Family
ID=57021605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610457848.6A Pending CN105974966A (en) | 2016-06-21 | 2016-06-21 | Digital temperature controller signal acquisition processing system based on linear filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105974966A (en) |
-
2016
- 2016-06-21 CN CN201610457848.6A patent/CN105974966A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105974958A (en) | High-precision signal acquisition and processing system for digital temperature controller | |
| CN108572579B (en) | Agricultural greenhouse data processing analysis system based on Internet of things | |
| CN102098012B (en) | Detection and amplification device for micro current | |
| CN105872313A (en) | High-definition image signal processing system | |
| CN203299260U (en) | Circuit capable of acquiring narrow pulse peak value | |
| CN205037982U (en) | Utilize constant current source temperature detection circuit of operational amplifier characteristic | |
| CN204374227U (en) | For the signal acquisition circuit of motor speed test | |
| CN105974966A (en) | Digital temperature controller signal acquisition processing system based on linear filter circuit | |
| CN104410941A (en) | Phase-shift processing based automatic-gain wide-range audio processing system | |
| CN104931136A (en) | Wide pulse triggering-based phase-shift type high-sensitivity infrared detection system | |
| CN207397132U (en) | High-precision temperature calibration system based on MCU | |
| CN106200714A (en) | A kind of purpose digital temperature controller signal acquiring processing system based on frequency stabilization circuit | |
| CN207095717U (en) | A kind of temperature transmitter circuit structure | |
| CN106020264A (en) | Signal acquisition and processing system for digital temperature controller | |
| CN204316738U (en) | Based on phase shift process from gain wide region audio frequency processing system | |
| CN203949962U (en) | The low-cost inverter type welder detecting device for output current of a kind of isolated form | |
| CN106020267A (en) | Signal acquisition processing system for digital temperature controller based on grid bias circuit | |
| CN105974959A (en) | Electronic temperature controller signal processing system based on low pass filter circuit | |
| CN203289386U (en) | Collected signals amplification module in transformer substation air-conditioner intelligent control system | |
| CN203275915U (en) | Acquisition signal amplifier of pump intelligent control system in transformer substation | |
| CN203278758U (en) | Collected signal preceding stage processor of air conditioning control subsystem in transformer substation | |
| CN208421050U (en) | A kind of unidirectional current sample circuit | |
| CN204065209U (en) | A kind of electric current isolation detection circuit | |
| CN104393850A (en) | Wide-range voice frequency treating system based on adaptive gain control | |
| CN106020266A (en) | Signal acquisition and processing system for frequency stabilization type high-precision digital temperature controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160928 |