CN105973482A - Temperature detecting system based on interference eliminating circuit - Google Patents
Temperature detecting system based on interference eliminating circuit Download PDFInfo
- Publication number
- CN105973482A CN105973482A CN201610429502.5A CN201610429502A CN105973482A CN 105973482 A CN105973482 A CN 105973482A CN 201610429502 A CN201610429502 A CN 201610429502A CN 105973482 A CN105973482 A CN 105973482A
- Authority
- CN
- China
- Prior art keywords
- resistance
- pole
- amplifier
- audion
- processing chip
- 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
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a temperature detecting system based on an interference eliminating circuit. The temperature detecting system is mainly composed of a processing chip U1, a temperature sensor U, the interference eliminating circuit which is connected with an IN+ pin of the processing chip U1, a base electrode triggering circuit which is serially connected between the temperature sensor U and the interference eliminating circuit, and a capacitor C4 of which the anode is connected with the V+ pin of the processing chip U1 through a resistor R9 and a resistor R8 and the cathode is connected with the BALANCE pin of the processing chip U1. The temperature detecting system can process the frequency of a detecting signal so that the frequency of the detecting signal is more stable, thereby keeping consistency between the waveform of an input detecting signal and the waveform of an output detecting signal, keeping fidelity of the detecting signal and preventing temperature detecting precision reduction caused by signal distortion.
Description
Technical field
The present invention relates to a kind of detecting system, specifically refer to a kind of temperature detection system based on interference cancellation circuit
System.
Background technology
In industrial processes and research work, many times it is required for production equipment or production environment
Temperature carry out detecting and according to demand temperature being controlled, thus improve the quality of production efficiency and product.
But, existing system for detecting temperature easily makes detection distorted signals when to detection signal processing, thus leads
Cause it and cannot detect temperature value accurately, it is impossible to meet Production requirement.
Summary of the invention
It is an object of the invention to overcome current system for detecting temperature easily to make inspection when to detection signal processing
Survey the defect of distorted signals, it is provided that a kind of system for detecting temperature based on interference cancellation circuit.
The purpose of the present invention realizes by following technical scheme: a kind of temperature detection system based on interference cancellation circuit
System, mainly by processing chip U1, temperature sensor U, the interference being connected with the IN+ pin processing chip U1
Eliminating circuit, the base stage being serially connected between temperature sensor U and interference cancellation circuit triggers circuit, and positive pole is sequentially
Be connected with the V+ pin processing chip U1 after resistance R8 through resistance R9, negative pole and process chip U1
The electric capacity C4 that BALANCE pin is connected, is serially connected in BALANCE pin and the BAL processing chip U1
Resistance R10 between pin, positive pole with process chip U1 BAL pin be connected, negative pole then with process chip
The GND pin of U1 be connected while the electric capacity C5 of ground connection, minus earth, positive pole after resistance R6 with process
The electric capacity C3 that the IN-pin of chip U1 is connected, and with the penetrating of being connected of OUT pin processing chip U1
Pole output circuit composition；The described V-pin of process chip U1 is connected with the positive pole of electric capacity C3；Described resistance
The junction point of R8 and resistance R9 triggers while circuit is connected with base stage and connects power supply.
Further, described interference cancellation circuit is by amplifier P1, amplifier P2, amplifier P4, audion
VT4, one end negative pole with amplifier P3 after resistance R14 is connected, the other end is as this interference cancellation circuit
The resistance R12 of input, be serially connected in resistance R12 and the junction point of resistance R14 and the outfan of amplifier P1
Between resistance R13, positive pole is connected with the positive pole of amplifier P1, negative pole then negative pole with amplifier P1 is connected
The electric capacity C7 of ground connection while connecing, resistance R16, the N pole being serially connected between positive pole and the outfan of amplifier P3
Be connected with the outfan of amplifier P3, diode D4 that P pole is connected with the colelctor electrode of audion VT4, with
And one end is connected with the emitter stage of audion VT4, the resistance R15 of other end ground connection composition；Described amplifier
The negative pole of P2 is connected with the positive pole of amplifier P1, its positive pole then with the junction point phase of resistance R12 and resistance R14
Connect, its outfan then base stage with audion VT4 is connected；The outfan of described amplifier P3 is done as this
Disturb and eliminate the outfan of circuit and be connected with the IN+ pin processing chip U1；Described interference cancellation circuit defeated
Enter end to be connected with base stage triggering circuit.
Described base stage triggers circuit by audion VT1, audion VT2, field effect transistor MOS, positive pole and three poles
The emitter stage of pipe VT1 is connected, negative pole sequentially after resistance R2 and resistance R7 with the output of interference cancellation circuit
The drain electrode with field effect transistor MOS after resistance R5 of electric capacity C1, the N pole that is connected of end is connected, P pole sequentially warp
Diode D2, the P pole being connected with the emitter stage of audion VT2 after electric capacity C2 and resistance R1 and diode D2
P pole be connected while two poles that are connected with the source electrode of field effect transistor MOS after resistance R4 of ground connection, N pole
Pipe D1, and the resistance R3 group being serially connected between colelctor electrode and the grid of field effect transistor MOS of audion VT2
Become；The base stage of described audion VT1 is connected with the signal input part of temperature sensor U, its colelctor electrode then with
The base stage of audion VT2 is connected；The drain electrode of described field effect transistor MOS and resistance R8 and the connection of resistance R9
Point is connected.
Described emitter output circuit is by amplifier P, audion VT3, P pole and the OUT pin processing chip U1
Be connected, diode D3 that N pole is connected with the positive pole of amplifier P, be serially connected in the N pole and three of diode D3
Resistance R11 between the base stage of pole pipe VT3, and positive pole is connected with the outfan of amplifier P, negative pole is made
Electric capacity C6 composition for the outfan of this emitter output circuit；The minus earth of described amplifier P, its outfan
It is connected with the emitter stage of audion VT3；The grounded collector of described audion VT3.
Described process chip U1 is the integrated chip of LM311.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) frequency of detection signal can be processed by the present invention, and the frequency making detection signal is more stable,
Such that it is able to make the waveform of the detection signal of input identical with the waveform of the detection signal of output, keep detection letter
Number fidelity, it is to avoid distorted signals and affect temperature detecting precision.
(2) the interference signal being entrained in detection signal can be eliminated by the present invention, makes detection signal more
Add clean, greatly improve the accuracy of detection 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 interference cancellation circuit of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, but embodiments of the present invention
It is not limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by processing chip U1, temperature sensor U, with the IN+ processing chip U1
The interference cancellation circuit that pin is connected, is serially connected in the base stage between temperature sensor U and interference cancellation circuit and touches
Power Generation Road, positive pole sequentially through resistance R9 after resistance R8 with process chip U1 V+ pin be connected, negative pole with
Process the electric capacity C4 that the BALANCE pin of chip U1 is connected, be serially connected in and process chip U1's
Resistance R10 between BALANCE pin and BAL pin, positive pole is connected with the BAL pin processing chip U1
Connect, negative pole be then connected with the GND pin processing chip U1 while the electric capacity C5 of ground connection, minus earth,
Positive pole after resistance R6 with the electric capacity C3 that is connected of IN-pin processing chip U1, and with process chip U1
OUT pin be connected emitter output circuit composition.
The described V-pin of process chip U1 is connected with the positive pole of electric capacity C3；Described resistance R8 and resistance R9
Junction point and base stage trigger while circuit is connected and connect power supply.In order to preferably implement the present invention, described
Process the chip U1 integrated chip of preferred LM311 to realize.This temperature sensor U then uses the pure Rehabilitation in Beijing nine
The JCJ100ZGF temperature sensor that skill Development Co., Ltd produces realizes.
Further, base stage triggers circuit by audion VT1, audion VT2, field effect transistor MOS, resistance
R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R7, electric capacity C1, electric capacity C2, diode
D1 and diode D2 composition.
During connection, the positive pole of electric capacity C1 is connected with the emitter stage of audion VT1, its negative pole is sequentially through resistance
It is connected with the input of interference cancellation circuit after R2 and resistance R7.The N pole of diode D2 after resistance R5 with
The drain electrode of field effect transistor MOS is connected, its P pole is connected with the negative pole of electric capacity C2.The positive pole of this electric capacity C2
Then after resistance R1, emitter stage with audion VT2 is connected.The P pole of diode D1 and the P pole of diode D2
While being connected, ground connection, its N pole source electrode with field effect transistor MOS after resistance R4 is connected.Resistance R3
It is serially connected between colelctor electrode and the grid of field effect transistor MOS of audion VT2.
Meanwhile, the base stage of described audion VT1 be connected with the signal input part of temperature sensor U, its current collection
Pole then base stage with audion VT2 is connected.The drain electrode of described field effect transistor MOS and resistance R8 and resistance R9
Junction point be connected.
It addition, described emitter output circuit by amplifier P, audion VT3, resistance R11, diode D3 with
And electric capacity C6 composition.The P pole of diode D3 with process chip U1 OUT pin be connected, its N pole with put
The positive pole of big device P is connected.Resistance R11 is serially connected between the N pole of diode D3 and the base stage of audion VT3.
The positive pole of electric capacity C6 is connected with the outfan of amplifier P, its negative pole is as the outfan of this emitter output circuit
And connect external display.The emitter stage phase of the minus earth of described amplifier P, its outfan and audion VT3
Connect；The grounded collector of described audion VT3.
As in figure 2 it is shown, described interference cancellation circuit is by amplifier P1, amplifier P2, amplifier P4, audion
VT4, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, electric capacity C7 and diode
D4 forms.
During connection, one end of resistance R12 negative pole with amplifier P3 after resistance R14 is connected, its other end
As this interference cancellation circuit input and sequentially after resistance R7 and resistance R2 with the negative pole phase of electric capacity C1
Connect.Resistance R13 is serially connected between the outfan of resistance R12 and the junction point of resistance R14 and amplifier P1.
The positive pole of electric capacity C7 is connected with the positive pole of amplifier P1, its negative pole then negative pole with amplifier P1 is connected
Ground connection simultaneously.Resistance R16 is serially connected between positive pole and the outfan of amplifier P3.The N pole of diode D4 with put
The outfan of big device P3 is connected, its P pole is connected with the colelctor electrode of audion VT4.One end of resistance R15
Be connected with the emitter stage of audion VT4, its other end ground connection.The negative pole of described amplifier P2 and amplifier
The positive pole of P1 is connected, its positive pole then junction point with resistance R12 and resistance R14 is connected, its outfan then
It is connected with the base stage of audion VT4.The outfan of described amplifier P3 is as the output of this interference cancellation circuit
End is also connected with the IN+ pin processing chip U1.
Temperature sensor output can be detected the frequency of signal and process by the present invention, makes detection signal
Frequency is more stable, such that it is able to make the waveform phase of the waveform of the detection signal of input and the detection signal of output
With, keep the fidelity of detection signal, and the interference signal being entrained in detection signal eliminated,
Make detection signal more clean, the most then can improve the accuracy of detection of the present invention greatly.
As it has been described above, just can well realize the present invention.
Claims (5)
1. a system for detecting temperature based on interference cancellation circuit, it is characterised in that mainly by processing chip
U1, temperature sensor U, the interference cancellation circuit being connected with the IN+ pin processing chip U1, it is serially connected in temperature
Base stage between degree sensor U and interference cancellation circuit triggers circuit, and positive pole is sequentially through resistance R9 and resistance R8
Be connected with the V+ pin processing chip U1 afterwards, negative pole is connected with the BALANCE pin of process chip U1
Electric capacity C4, be serially connected in process chip U1 BALANCE pin and BAL pin between resistance R10, just
Pole is connected with the BAL pin processing chip U1, negative pole is then connected with the GND pin processing chip U1
The electric capacity C5 of ground connection simultaneously, minus earth, positive pole are connected with the IN-pin processing chip U1 after resistance R6
The electric capacity C3 connect, and the emitter output circuit composition being connected with the OUT pin processing chip U1；Described
The V-pin processing chip U1 is connected with the positive pole of electric capacity C3；The junction point of described resistance R8 and resistance R9 with
Base stage triggers while circuit is connected and connects power supply.
A kind of system for detecting temperature based on interference cancellation circuit the most according to claim 1, its feature
It is: described interference cancellation circuit is by amplifier P1, amplifier P2, amplifier P4, audion VT4, one
End negative pole with amplifier P3 after resistance R14 is connected, the other end is as the input of this interference cancellation circuit
Resistance R12, be serially connected in the electricity between the outfan of resistance R12 and the junction point of resistance R14 and amplifier P1
Resistance R13, while positive pole is connected with the positive pole of amplifier P1, negative pole then negative pole with amplifier P1 is connected
The electric capacity C7 of ground connection, is serially connected in resistance R16, the N pole between positive pole and the outfan of amplifier P3 and amplifier
The diode D4 that the outfan of P3 is connected, P pole is connected with the colelctor electrode of audion VT4, and one end with
The emitter stage of audion VT4 is connected, the resistance R15 of other end ground connection composition；The negative pole of described amplifier P2
Be connected with the positive pole of amplifier P1, its positive pole then junction point with resistance R12 and resistance R14 is connected, it
Outfan then base stage with audion VT4 is connected；The outfan of described amplifier P3 eliminates electricity as this interference
The outfan on road is also connected with the IN+ pin processing chip U1.
A kind of system for detecting temperature based on interference cancellation circuit the most according to claim 2, its feature
It is: described base stage triggers circuit by audion VT1, audion VT2, field effect transistor MOS, positive pole and three
The emitter stage of pole pipe VT1 is connected, negative pole sequentially defeated with interference cancellation circuit after resistance R2 and resistance R7
Go out the drain electrode with field effect transistor MOS after resistance R5 of electric capacity C1, the N pole that is connected of end be connected, P pole sequentially
Through diode D2, P pole that electric capacity C2 emitter stage with audion VT2 after resistance R1 is connected and diode
The P pole of D2 be connected while ground connection, N pole be connected with the source electrode of field effect transistor MOS after resistance R4 two
Pole pipe D1, and it is serially connected in the resistance R3 between colelctor electrode and the grid of field effect transistor MOS of audion VT2
Composition；The base stage of described audion VT1 is connected with the signal input part of temperature sensor U, its colelctor electrode then
It is connected with the base stage of audion VT2；The drain electrode of described field effect transistor MOS and resistance R8 and the company of resistance R9
Contact is connected.
A kind of system for detecting temperature based on interference cancellation circuit the most according to claim 3, its feature
It is: described emitter output circuit is by amplifier P, audion VT3, P pole and the OUT pipe processing chip U1
The diode D3 that foot is connected, N pole is connected with the positive pole of amplifier P, be serially connected in diode D3 N pole and
Resistance R11 between the base stage of audion VT3, and positive pole is connected with the outfan of amplifier P, negative pole
Electric capacity C6 composition as the outfan of this emitter output circuit；The minus earth of described amplifier P, its output
End is connected with the emitter stage of audion VT3；The grounded collector of described audion VT3.
A kind of system for detecting temperature based on interference cancellation circuit the most according to claim 4, its feature
It is: described process chip U1 is the integrated chip of LM311.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610429502.5A CN105973482A (en) | 2016-06-15 | 2016-06-15 | Temperature detecting system based on interference eliminating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610429502.5A CN105973482A (en) | 2016-06-15 | 2016-06-15 | Temperature detecting system based on interference eliminating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105973482A true CN105973482A (en) | 2016-09-28 |
Family
ID=57022772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610429502.5A Pending CN105973482A (en) | 2016-06-15 | 2016-06-15 | Temperature detecting system based on interference eliminating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105973482A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108508939A (en) * | 2018-07-05 | 2018-09-07 | 深圳市思美悦科技有限公司 | A kind of intelligent heating system of electronic cigarette |
| CN110794889A (en) * | 2019-10-29 | 2020-02-14 | 刘洋 | Temperature control system for slice dyeing reaction cabin |
| CN112154310A (en) * | 2018-05-15 | 2020-12-29 | 微芯片技术股份有限公司 | Base resistance cancellation methods and related methods, systems, and apparatus |
-
2016
- 2016-06-15 CN CN201610429502.5A patent/CN105973482A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112154310A (en) * | 2018-05-15 | 2020-12-29 | 微芯片技术股份有限公司 | Base resistance cancellation methods and related methods, systems, and apparatus |
| CN112154310B (en) * | 2018-05-15 | 2023-08-29 | 微芯片技术股份有限公司 | Base resistance cancellation methods and related methods, systems, and apparatus |
| US11768115B2 (en) | 2018-05-15 | 2023-09-26 | Microchip Technology Incorporated | Base resistance cancellation method and related methods, systems, and devices |
| CN108508939A (en) * | 2018-07-05 | 2018-09-07 | 深圳市思美悦科技有限公司 | A kind of intelligent heating system of electronic cigarette |
| CN110794889A (en) * | 2019-10-29 | 2020-02-14 | 刘洋 | Temperature control system for slice dyeing reaction cabin |
| CN110794889B (en) * | 2019-10-29 | 2021-06-22 | 刘洋 | Temperature control system for slice dyeing reaction cabin |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105973482A (en) | Temperature detecting system based on interference eliminating circuit | |
| CN105974958A (en) | High-precision signal acquisition and processing system for digital temperature controller | |
| CN106017699A (en) | Temperature detection system | |
| CN106017700A (en) | Interference cancellation circuit-based gain amplification type temperature detection system | |
| CN104931136A (en) | Wide pulse triggering-based phase-shift type high-sensitivity infrared detection system | |
| CN105242098A (en) | Constant current source aluminum electrolysis anode current measuring instrument based on differential amplification | |
| CN105978502A (en) | Temperature detecting system based on linearity processing circuit | |
| CN103698661A (en) | Cable breakage detection device | |
| CN105978503A (en) | Gain amplification type temperature detection system based on linearity processing circuit | |
| CN105973491A (en) | Temperature detecting system based on gain amplifying circuit | |
| CN205453652U (en) | Photoelectricity pulse amplification shaping circuit | |
| CN106200714A (en) | A kind of purpose digital temperature controller signal acquiring processing system based on frequency stabilization circuit | |
| CN106053926A (en) | Electric leakage detection system based on interference inhibition circuit | |
| CN105510844B (en) | Constant pressure load circuit and the simulated battery for using the constant pressure load circuit | |
| CN203984389U (en) | A kind of detection system of high-sensitivity detection instrument | |
| CN203673022U (en) | Cable break detection device | |
| CN104065351B (en) | Power amplifier based on monolithic integrated circuit | |
| CN204313968U (en) | A kind of highly sensitive IR detection system | |
| CN106020281A (en) | Signal amplification type high precision constant temperature automatic control system based on buffer protection circuit | |
| CN105891880A (en) | High-frequency detection system | |
| CN105872416A (en) | High-definition image signal processing system based on low-frequency amplifying circuit | |
| CN104596648A (en) | High-sensitivity infrared detection system | |
| CN105872316A (en) | High-definition image signal processing system based on constant-current source circuit | |
| CN207742265U (en) | A kind of capacitor detector | |
| CN105807123B (en) | Magnetize the current collection circuit of power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160928 |
|
| WD01 | Invention patent application deemed withdrawn after publication |