CN105978502A - Temperature detecting system based on linearity processing circuit - Google Patents
Temperature detecting system based on linearity processing circuit Download PDFInfo
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- CN105978502A CN105978502A CN201610429998.6A CN201610429998A CN105978502A CN 105978502 A CN105978502 A CN 105978502A CN 201610429998 A CN201610429998 A CN 201610429998A CN 105978502 A CN105978502 A CN 105978502A
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- 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
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- 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
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- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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Abstract
This invention discloses a temperature detecting system based on linearity processing circuit. The system is mainly composed of a processing chip U1, a temperature sensor U, a base trigger circuit, a capacitor C4, and so on; the base trigger circuit is connected between the temperature sensor U and the IN+ pin of the processing chip U1 in series; the positive pole of the capacitor C4 sequentially passes through a resistor R9 and a resistor R8 to be connected with the V+ pin of the processing chip U1; and the negative pole of the capacitor C4 is connected with the BALANCE pin of the processing chip U1. The temperature detecting system provided by this invention can process the frequency of the detection signal, so that the frequency of the detection signal is more stable; thus, the waveform of the inputted detection signal is same with that of the outputted detection signal; the fidelity of the detection signal is kept; and the problem that the temperature detection precision is affected due to the signal distortion is avoided. Simultaneously, the temperature detecting system provided by this invention can improve the linearity of the detection signal; the detection signal is more stable; and thus, the detection error is reduced.
Description
Technical field
The present invention relates to a kind of detecting system, specifically refer to a kind of temperature detection processing circuit based on the linearity
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 processing circuit based on the linearity.
The purpose of the present invention realizes by following technical scheme: a kind of temperature detection processing circuit based on the linearity
System, mainly by processing chip U1, temperature sensor U, is serially connected in temperature sensor U and processes chip U1
IN+ pin between base stage trigger circuit, positive pole sequentially after resistance R9 and resistance R8 with process chip U1
The electric capacity C4 that V+ pin is connected, negative pole is connected with the BALANCE pin of process chip U1, concatenation
Resistance R10 between BALANCE pin and the BAL pin processing chip U1, positive pole and process chip U1
BAL pin be connected, negative pole be then connected with the GND pin processing chip U1 while the electric capacity of ground connection
C5, the electric capacity C3 that minus earth, positive pole are connected with the IN-pin processing chip U1 after resistance R6, with
Process the linearity process circuit that the OUT pin of chip U1 is connected, and be connected with linearity process circuit
The emitter output circuit composition connect；The described V-pin of process chip U1 is connected with the positive pole of electric capacity C3；Institute
State the junction point of resistance R8 and resistance R9 to trigger while circuit is connected with base stage and connect power supply.
Further, the described linearity process circuit by audion VT4, audion VT5, audion VT6,
Audion VT7, amplifier P1, positive pole emitter stage with audion VT4 after resistance R12 is connected, negative pole
The electric capacity C7 that colelctor electrode with audion VT6 is connected after potentiometer R13, is serially connected in the collection of audion VT7
Resistance R14 between the negative pole of electrode and amplifier P1, and N pole after resistance R16 ground connection, P pole through resistance
The diode D4 composition that after R15, colelctor electrode with audion VT6 is connected；The plus earth of described electric capacity C7,
Its negative pole is then connected with the control end of potentiometer R13；The base stage of described audion VT4 as this linearity at
Reason circuit input and with process chip U1 OUT pin be connected, its colelctor electrode then with audion VT5
Base stage be connected；The emitter stage of described audion VT7 connects while being connected with the emitter stage of audion VT5
Ground, its base stage then emitter stage with audion VT6 is connected；The base stage of described audion VT6 and audion
The colelctor electrode of VT5 is connected；The positive pole of described amplifier P1 is connected with the N pole of diode D4, its outfan
Process the outfan of circuit as this linearity and be connected with emitter output 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 is sequentially managed with the IN+ processing chip U1 after resistance R2 and resistance R7
Electric capacity C1, the N pole that foot is connected drain electrode with field effect transistor MOS after resistance R5 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 processed the output of circuit by amplifier P, audion VT3, P pole with the linearity
End is connected, diode D3 that N pole is connected with the positive pole of amplifier P, be serially connected in the N pole of diode D3 with
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.
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) present invention can improve the linearity of detection signal, makes detection signal more stable, thus reduces
The detection error of the present invention.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is that the linearity of the present invention processes circuit structure diagram.
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, it is serially connected in temperature sensor
Base stage between U and the IN+ pin processing chip U1 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, processes circuit with the linearity that is connected of OUT pin processing chip U1, and with linearly
Degree processes the emitter output circuit composition that circuit is connected.
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 IN+ pin processing chip U1 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 and the linearity process the outfan of circuit 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 linearity process circuit is by audion VT4, audion VT5, audion VT6,
Audion VT7, amplifier P1, resistance R12, potentiometer 13, resistance R14, resistance R15, resistance R16,
Diode D4 and electric capacity C7 composition.
During connection, the positive pole of electric capacity C7 emitter stage with audion VT4 after resistance R12 is connected, its negative pole
After potentiometer R13, the colelctor electrode with audion VT6 is connected.Resistance R14 is serially connected in the collection of audion VT7
Between the negative pole of electrode and amplifier P1.The N pole of diode D4 after resistance R16 ground connection, its P pole through resistance
After R15, the colelctor electrode with audion VT6 is connected.
The plus earth of described electric capacity C7, its negative pole are then connected with the control end of potentiometer R13.Described three poles
The base stage of pipe VT4 processes the input of circuit as this linearity and is connected with the OUT pin processing chip U1
Connect, its colelctor electrode then base stage with audion VT5 is connected.The emitter stage of described audion VT7 and audion
While the emitter stage of VT5 is connected, ground connection, its base stage then emitter stage with audion VT6 is connected.Described
The base stage of audion VT6 is connected with the colelctor electrode of audion VT5.The positive pole of described amplifier P1 and diode
The N pole of D4 is connected, its outfan as this linearity process circuit outfan and with the P of diode D3
Pole is connected.
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, meanwhile, the present invention can improve the linearity of detection signal, makes inspection
Survey signal more stable, thus reduce the detection error of the present invention.
As it has been described above, just can well realize the present invention.
Claims (5)
1. the system for detecting temperature processing circuit based on the linearity, it is characterised in that mainly by processing core
Sheet U1, temperature sensor U, be serially connected in the base stage between temperature sensor U and the IN+ pin processing chip U1
Triggering circuit, positive pole is sequentially connected with the V+ pin processing chip U1 after resistance R8 through resistance R9, negative pole
The electric capacity C4 being connected with the BALANCE pin processing chip U1, is serially connected in and processes 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,
The electric capacity C3 that positive pole is connected with the IN-pin processing chip U1 after resistance R6, with process chip U1's
The linearity that OUT pin is connected processes circuit, and processes the emitter-base bandgap grading output that circuit is connected with the linearity
Circuit forms；The described V-pin of process chip U1 is connected with the positive pole of electric capacity C3；Described resistance R8 and electricity
The junction point of resistance R9 triggers while circuit is connected with base stage and connects power supply.
A kind of system for detecting temperature processing circuit based on the linearity the most according to claim 1, it is special
Levy and be: the described linearity processes circuit by audion VT4, audion VT5, audion VT6, audion
VT7, amplifier P1, positive pole emitter stage with audion VT4 after resistance R12 is connected, negative pole is through current potential
The electric capacity C7 that after device R13, colelctor electrode with audion VT6 is connected, be serially connected in audion VT7 colelctor electrode and
Resistance R14 between the negative pole of amplifier P1, and N pole after resistance R16 ground connection, P pole after resistance R15
The diode D4 composition being connected with the colelctor electrode of audion VT6；The plus earth of described electric capacity C7, it bears
Pole is then connected with the control end of potentiometer R13；The base stage of described audion VT4 processes electricity as this linearity
The input on road and be connected with the OUT pin processing chip U1, its colelctor electrode then with the base of audion VT5
Pole is connected；The emitter stage of described audion VT7 be connected with the emitter stage of audion VT5 while ground connection,
Its base stage then emitter stage with audion VT6 is connected；The base stage of described audion VT6 is with audion VT5's
Colelctor electrode is connected；The positive pole of described amplifier P1 is connected with the N pole of diode D4, its outfan conduct
This linearity processes the outfan of circuit and is connected with emitter output circuit.
A kind of system for detecting temperature processing circuit based on the linearity the most according to claim 2, it is special
Levy and be: described base stage triggers circuit by audion VT1, audion VT2, field effect transistor MOS, positive pole with
The emitter stage of audion VT1 is connected, negative pole sequentially after the resistance R2 and resistance R7 with process chip U1
Electric capacity C1, the N pole that IN+ pin is connected drain electrode with field effect transistor MOS after resistance R5 is connected, P pole
Diode D2, the P pole and two being sequentially connected through electric capacity C2 emitter stage with audion VT2 after resistance R1
While the P pole of pole pipe D2 is connected, ground connection, N pole source electrode with field effect transistor MOS after resistance R4 is connected
Diode D1, and be serially connected in the electricity between colelctor electrode and the grid of field effect transistor MOS of audion VT2
Resistance R3 composition；The base stage of described audion VT1 is 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.
A kind of system for detecting temperature processing circuit based on the linearity the most according to claim 3, it is special
Levy and be: described emitter output circuit is processed circuit by amplifier P, audion VT3, P pole with the linearity
The diode D3 that outfan is connected, N pole is connected with the positive pole of amplifier P, is serially connected in the N of diode D3
Resistance R11 between the base stage of pole and audion VT3, and positive pole is connected with the outfan of amplifier P,
Negative pole forms as the electric capacity C6 of the outfan of this emitter output circuit；The minus earth of described amplifier P, its
Outfan is connected with the emitter stage of audion VT3；The grounded collector of described audion VT3.
A kind of system for detecting temperature processing circuit based on the linearity the most according to claim 4, it is special
Levy and be: described process chip U1 is the integrated chip of LM311.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610429998.6A CN105978502A (en) | 2016-06-15 | 2016-06-15 | Temperature detecting system based on linearity processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610429998.6A CN105978502A (en) | 2016-06-15 | 2016-06-15 | Temperature detecting system based on linearity processing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105978502A true CN105978502A (en) | 2016-09-28 |
Family
ID=57022812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610429998.6A Pending CN105978502A (en) | 2016-06-15 | 2016-06-15 | Temperature detecting system based on linearity processing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105978502A (en) |
-
2016
- 2016-06-15 CN CN201610429998.6A patent/CN105978502A/en active Pending
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Application publication date: 20160928 |
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| WD01 | Invention patent application deemed withdrawn after publication |