CN103439022B - The temperature sensing circuit of house refuse cracking waste plastics reaction - Google Patents
The temperature sensing circuit of house refuse cracking waste plastics reaction Download PDFInfo
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- CN103439022B CN103439022B CN201310334173.2A CN201310334173A CN103439022B CN 103439022 B CN103439022 B CN 103439022B CN 201310334173 A CN201310334173 A CN 201310334173A CN 103439022 B CN103439022 B CN 103439022B
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Abstract
The present invention relates to the temperature sensing circuit of one way of life rubbish cracking waste plastics reaction.Current Temperatures detection system can't meet the demands completely in accuracy and reliability.The present invention includes temperature-compensation circuit module, temperature signal amplification module, active low-pass filter module, A/D modular converter, differential processing module.Temperature sensing element perceives temperature signal, is linked into compensating circuit module; An input end of the output terminal jointing temp signal amplification module of compensating circuit module; The output terminal of active low-pass filter module jointing temp signal amplification module; Filtering completes the input end connecing A/D modular converter, the output termination differential processing module of A/D modular converter.The output terminal of differential processing module is as the output terminal of this circuit.Circuit temperature accuracy of the present invention is high, and antijamming capability is strong, and cost is low.
Description
Technical field
The invention belongs to signal detection technique field, relate to the temperature sensing circuit of one way of life rubbish cracking waste plastics reaction.
Background technology
Society, the problem such as the energy, environmental protection becomes increasingly conspicuous, and recovery, the secondary of rubbish utilize, and are more and more subject to people's attention, and become the developing direction of the contemporary energy gradually.To in the processing procedure of rubbish, temperature is an important physical quantity, and be one of important parameter needing to measure and control, the Yield and quality, energy consumption etc. of the product obtained are all directly relevant with temperature.Therefore, measuring tempeature is of great practical significance exactly.
In the process that rubbish is processed, after needing some pre-service of process, relatively cleaner, that water cut is lower rubbish is sent in reactor comparatively speaking, decomposes, produce the rock gas required for us, carbon black, the wet goods energy in the environment of high temperature to rubbish.In the reactor of high temperature, the Measurement & Control of temperature is a very important link, the data accuracy that traditional high ambient temperatures measuring method obtains is not high, and temperature controls bad meeting and causes rubbish to produce some unnecessary products in the process of decomposing, the quality of impact oil.And the life-span of traditional temperature measuring equipment is not long, in the process used, spoilage is higher.Current, market there is relevant detection system, but can't meet the demands completely in accuracy and reliability, developed a kind of high precision, jamproof high-temperature temperature detection system just becomes very urgent.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, is the accuracy improving system for detecting temperature under hot environment, provides a kind ofly to add method with bridge circuit as temperature-compensation circuit, the temperature sensing circuit adding differential processing module simultaneously at input end.This temperature sensing circuit can run in high temperature environments well, improves the accuracy of temperature detection.
The present invention is the scheme that technical solution problem proposes: this circuit comprises temperature-compensation circuit module, temperature signal amplification module, active low-pass filter module, A/D modular converter, differential processing module.What wherein the sensor of temperature sensing adopted is K-type thermopair, it is simple, easy to make that it has structure, temperature-measuring range wide (being low to moderate negative 180 DEG C, high to 1800 DEG C), high temperature resistant, accuracy is high, low price, easy to use, be suitable for telemeasurement and the advantage such as automatically control.In addition, because thermopair is a kind of active sensor, during measurement, do not need additional power source, use very convenient, so be often used as measurement stove, the surface temperature of the gas in pipeline or the temperature of liquid and solid.Thus, it obtains applying more widely in high temperature measurement.
Temperature sensing element perceives temperature signal, is linked into compensating circuit module; An input end of the output terminal jointing temp signal amplification module of compensating circuit module; The output terminal of active low-pass filter module jointing temp signal amplification module; The input end of A/D modular converter is connect, the output termination differential processing module of A/D modular converter after filtering completes.
Described temperature-compensation circuit module comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, power supply V1.One end of the one termination second resistance R2 of the first resistance R1, node jointing temp induction element-K type thermopair between first resistance R1 and the second resistance R2, the other end of one end of power supply V1, a termination first resistance R1 of the 3rd resistance R3, one end of another termination the 5th resistance R5 of power supply V1, one end of another termination the 4th resistance R4 of 3rd resistance R3, the input end of temperature signal amplification circuit module, the other end of the other end of the 4th resistance R4, another termination the 5th resistance R5 of the second resistance R2.
Described temperature signal amplification module comprises the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11 resistance R11, the 12 resistance R12, the first operational amplifier U1, the second operational amplifier U2, the 3rd operational amplifier U3.One end of 6th resistance R6, the output terminal of the one termination first operational amplifier U1 of the 9th resistance R9, the other end of the 6th resistance R6, the negative input of the first operational amplifier U1 connects one end of the 7th resistance R7, the other end of the 7th resistance R7, the positive input of the second operational amplifier U2 connects one end of the 8th resistance R8, the other end of the 8th resistance R8, one end of output termination the tenth resistance R10 of the second operational amplifier U2, the other end of the tenth resistance R10, the negative input of the 3rd operational amplifier U3 connects one end of the 12 resistance R12, the voltage of another termination-5V of the 12 resistance R12, the positive input of the 3rd operational amplifier U3, one end of another termination the 11 resistance R11 of the 9th resistance R9, the output terminal of another termination the 3rd operational amplifier U3 of the 11 resistance R11 exports the voltage V0 of operation amplifier module, wherein the first operational amplifier U1 positive supply connects+5V voltage, first operational amplifier U1 negative supply connects-5V voltage, second operational amplifier U2 positive supply connects+5V voltage, second operational amplifier U2 negative supply connects-5V voltage, 3rd operational amplifier U3 positive supply connects+5V voltage, and the 3rd operational amplifier U3 negative supply connects-5V voltage.
Described active low-pass filter module comprises the 13 resistance R13,14 resistance R14, the 15 resistance R15, the 16 resistance R16,17 resistance R17,18 resistance R18, the first electric capacity C11, the second electric capacity C12,3rd electric capacity C13,4th electric capacity C14, four-operational amplifier U4A, the 5th operational amplifier U5A.One end of 13 resistance R13, one end of 14 resistance R14, one end of the one termination second electric capacity C12 of the first electric capacity C11, the other end of the second electric capacity C12, one end of 15 resistance R15, the output terminal of the one termination four-operational amplifier U4A of the 16 resistance R16, the other end of the first electric capacity C11, another termination four-operational amplifier U4A negative input of the 15 resistance R15, four-operational amplifier U4A positive input ground connection, the other end ground connection of the 14 resistance R14, the other end of the 16 resistance R16, one end of 17 resistance R17, one end of one termination the 4th electric capacity C14 of the 3rd electric capacity C13, the other end of the 4th electric capacity C14, one termination the 5th operational amplifier U5A negative input of the 18 resistance R18, the other end of the 3rd electric capacity C13, the output terminal of another termination the 5th operational amplifier U5A of the 18 resistance R18, the positive input ground connection of the 5th operational amplifier U5A, 17 resistance R17 ground connection.
Described A/D modular converter comprises the 19 resistance R20, the 20 resistance R21, and the 5th is electric capacity C20, the 6th electric capacity C21, the 7th electric capacity C22, the 8th electric capacity C23, the 9th electric capacity C24, the tenth electric capacity C25, A/D change-over circuit AD976A.One end of 19 resistance R20, the Vin pin of the one termination AD976A of the 20 resistance R21, another termination power VCC of the 20 resistance R21, the anode of the 7th electric capacity C22, the VANA pin of the one termination AD976A of the 8th electric capacity C23, the negative terminal of the 7th electric capacity C22, the negative terminal of another termination the tenth electric capacity C25 of the 8th electric capacity C23, the CAP pin of the positive termination AD976A of the tenth electric capacity C25, the negative terminal of the 7th electric capacity C22, the negative terminal of another termination the 9th electric capacity C24 of the 8th electric capacity C23, the REF pin of the positive termination AD976A of the 9th electric capacity C24, the other end of the 8th electric capacity C23 also connects AGND1 pin and the AGND2 pin of AD976A respectively, the BYIE pin of AD976A, the CS pin ground connection of AD976A, the anode of the 6th electric capacity C21, one end ground connection of the 5th electric capacity, the negative terminal of the 6th electric capacity C21, the VDIG pin of another termination AD976A of the 5th electric capacity C20, the DGND ground connection of AD976A.
Described differential processing module comprises the 21 resistance R50, the 22 resistance R51, the 23 resistance R52, the 24 resistance R53, the 25 resistance R54, the 11 electric capacity C27, the first triode D2, the second triode D3, the 6th operational amplifier U3CA, the 7th operational amplifier U3DA.One termination+5V the voltage source of the 21 resistance R50, one end of the other end of the 21 resistance R50, one end of the 11 electric capacity C27, the 22 resistance R51, the M pole of the first triode D2, the M pole of the second triode D3, the negative input of the 7th operational amplifier U3DA connect the positive input of the 6th operational amplifier U3CA; The other end of the 22 resistance R51, the equal ground connection of the other end of the 11 electric capacity C27; The output terminal of the one termination A/D modular converter of the 23 resistance R52, and as the signal input part of differential processing module; The N pole of the other end of the 23 resistance R52, the P pole of the first triode D2, the first triode D2, the P pole of the second triode D3, the N pole of the second triode D3, the positive input of the 7th operational amplifier U3DA connect the negative input of the 6th operational amplifier U2CA; One end of output termination the 24 resistance R53 of the 6th operational amplifier U3CA, the other end of the 24 resistance R53 is the first signal output part of differential processing module; Output termination the 25 resistance R54 one end of 7th operational amplifier U3DA, the other end of the 25 resistance R54 is the secondary signal output terminal of differential processing module.
The present invention has following beneficial effect relative to prior art: circuit temperature accuracy of the present invention is high, and antijamming capability is strong, and cost is low.High the referring to of thermometric accuracy have employed temperature-compensation circuit module, and applies high-precision A/D converter.Anti-interferencely refer to that have employed difference channel processes the signal after A/D conversion, and adds the transmitting range of signal.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present invention;
Fig. 2 is temperature compensation module circuit diagram;
Fig. 3 is temperature signal amplification module circuit diagram;
Fig. 4 active low-pass filter module circuit diagram;
Fig. 5 is A/D conversion module circuit diagram;
Fig. 6 is differential processing module circuit diagram;
Specific embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 1, the temperature sensing circuit of one way of life rubbish cracking waste plastics reaction comprises temperature-compensation circuit module, temperature signal amplification module, active low-pass filter module, A/D modular converter, differential processing module.
Temperature sensing element has carried out the perception to temperature by K type thermopair, the temperature signal perceived is completed compensate function for temperature in conjunction with temperature compensation module circuit, the more stable temperature signal obtained is delivered to temperature signal amplification module, faint temperature signal is amplified, be connected to active low-pass filter module again, some noises in filtering temperature signal, then the simulating signal of the temperature obtained is converted to digital signal through A/D change-over circuit, differential processing module obtains the output signal of this temperature sensing circuit after being processed by the input signal from A/D modular converter.
As shown in Figure 2, temperature-compensation circuit module mainly comprises: the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, power supply V1.One end of the one termination second resistance R2 of the first resistance R1, node jointing temp induction element between first resistance R1 and the second resistance R2---K type thermopair, the other end of one end of power supply V1, a termination first resistance R1 of the 3rd resistance R3, another termination the 5th resistance R5 of power supply V1, one end of another termination the 4th resistance R4 of 3rd resistance R3, the input end of temperature signal amplification circuit module, the other end of the other end of the 4th resistance R4, another termination the 5th resistance R5 of the second resistance R2.
In this compensating circuit, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 are not temperature variant resistance, and the first resistance R1 is temperature variant resistance, and the 5th resistance R5 is the adjustable resistance of regulating power source voltage.If i is the electric current flowing through the second resistance R2, the voltage that voltage V1 provides is E.When the cold junction temperature of thermopair is 0, the electric bridge of whole compensating circuit is equilibrium state, then the ratio of the first resistance R1 and the second resistance R2 equals the ratio of the 3rd resistance R3 and the 4th resistance R4.As cold junction temperature change t, electric bridge meeting out of trim, produce voltage electromotive force e=R2*k*t*i, we adopt nickel chromium triangle nickel alumin(i)um alloy line, compensating resistance adopts ambrose alloy, if its temperature-coefficient of electrical resistance 0 degree time is 0.00443, cold junction compensation scope is 0-100 degree, set again by the electric current of R2 as 2 milliamperes, power voltage supply is 1.5 volts.We learn from the thermometer of K type thermopair, and cold junction is when 0 to 100 spend, and the temperature difference produced is approximately about 4 millivolts.So the resistance value of the second resistance R2 0 time is 4.627
, the resistance of the first resistance R1 is 745.373
, the tissue of the 3rd resistance R3 is identical with the resistance of the first resistance R1, and the resistance of the 4th resistance R4 is identical with the resistance of the second resistance R2
Thermocouple induction is to the temperature signal in reactor, through temperature-compensation circuit module, the temperature of induction is compensated, due in side circuit, the signal exported from thermopair is maximum only tens millivolts (<30mV), and wherein comprise the common mode interference such as power frequency, electrostatic and magnetic coupling, amplifying this circuit just needs amplifying circuit to have very high common-mode rejection ratio and high-gain, low noise and high input impedance, therefore should adopt measuring and amplifying circuit.
As shown in Figure 3, temperature signal amplification module mainly comprises: the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11 resistance R11, the 12 resistance R12, the first operational amplifier U1, the second operational amplifier U2, the 3rd operational amplifier U3.One end of 6th resistance R6, the output terminal of the one termination first operational amplifier U1 of the 9th resistance R9, the other end of the 6th resistance R6, the negative input of the first operational amplifier U1 connects one end of the 7th resistance R7, the other end of the 7th resistance R7, the positive input of the second operational amplifier U2 connects one end of the 8th resistance R8, the other end of the 8th resistance R8, one end of output termination the tenth resistance R10 of the second operational amplifier U2, the other end of the tenth resistance R10, the negative input of the 3rd operational amplifier U3 connects one end of the 12 resistance R12, the voltage of another termination-5V of the 12 resistance R12, the positive input of the 3rd operational amplifier U3, one end of another termination the 11 resistance R11 of the 9th resistance R9, the output terminal of another termination the 3rd operational amplifier U3 of the 11 resistance R11 exports the voltage V0 of operation amplifier module, wherein the first operational amplifier U1 positive supply connects+5V voltage, first operational amplifier U1 negative supply connects-5V voltage, second operational amplifier U2 positive supply connects+5V voltage, second operational amplifier U2 negative supply connects-5V voltage, 3rd operational amplifier U3 positive supply connects+5V voltage, and the 3rd operational amplifier U3 negative supply connects-5V voltage.
Thermopair 500 degree of output voltages are 20.6443mv, 1200 degree output voltage is 28.1939mv, it is 89 that this temperature amplifying circuit can obtain enlargement factor.
In high-acruracy survey, faint interference all can cause very large impact to measurement, and for this reason, the signal feeding A/D circuit after being amplified by amplifying circuit devises first-level filtering wave circuit before changing.
As shown in Figure 4, active low-pass filter module comprises the 13 resistance R13, the 14 resistance R14,15 resistance R15,16 resistance R16, the 17 resistance R17, the 18 resistance R18,11 electric capacity C11,12 electric capacity C12, the 13 electric capacity C13, the 14 electric capacity C14, four-operational amplifier U4A, the 5th operational amplifier U5A.One end of 13 resistance R13, one end of 14 resistance R14, one end of one termination the 12 electric capacity C12 of the 11 electric capacity C11, the other end of the 12 electric capacity C12, one end of 15 resistance R15, the output terminal of the one termination four-operational amplifier U4A of the 16 resistance R16, the other end of the 11 electric capacity C11, another termination four-operational amplifier U4A negative input of the 15 resistance R15, four-operational amplifier U4A positive input ground connection, the other end ground connection of the 14 resistance R14, the other end of the 16 resistance R16, one end of 17 resistance R17, one end of one termination the 14 electric capacity C14 of the 13 electric capacity C13, the other end of the 14 electric capacity C14, one termination the 5th operational amplifier U5A negative input of the 18 resistance R18, the other end of the 13 electric capacity C13, the output terminal of another termination the 5th operational amplifier U5A of the 18 resistance R18, the positive input ground connection of the 5th operational amplifier U5A, 17 resistance R17 ground connection.
A/D modular converter adopts A/D converter AD976A to form, and be a kind of high-resolution A/D converter, input voltage range-10V ~+10V, switching rate is up to 200 KSPS, and 16 bit double-polarity control, most significant digit represents sign bit.When AD976A carries out temperature data acquisition, put CS pin and be fixed as low level, then conversion timing sequence is controlled by the negative edge of R/C signal, and signal pulse width is at least 50ns.When R/C becomes low level, BUSY signal also becomes low level, and mark EOC, then the two's complement that the data in shift register are updated substitutes, and wherein, R/C control end is controlled by the I/O port of microcontroller.
As shown in Figure 5, A/D modular converter mainly comprises: the 19 resistance R20, the 20 resistance R21, and the 5th is electric capacity C20, the 6th electric capacity C21, the 7th electric capacity C22, the 8th electric capacity C23, the 9th electric capacity C24, the tenth electric capacity C25, A/D change-over circuit AD976A.One end of 19 resistance R20, the Vin pin of the one termination AD976A of the 20 resistance R21, another termination power VCC of the 18 resistance R21, one end of 7th electric capacity C22, the VANA pin of the one termination AD976A of the 8th electric capacity C23, the other end of the 7th electric capacity C22, one end of another termination the tenth electric capacity C25 of the 8th electric capacity C23, the CAP pin of another termination AD976A of the tenth electric capacity C25, the other end of the 7th electric capacity C22, one end of another termination the 9th electric capacity C24 of the 8th electric capacity C23, the REF pin of another termination AD976A of the 9th electric capacity C24, the other end of the 8th electric capacity C23 also connects AGND1 pin and the AGND2 pin of AD976A respectively, the BYIE pin of AD976A, the CS pin ground connection of AD976A, one end of 6th electric capacity C21, one end ground connection of the 5th electric capacity, the other end of the 6th electric capacity C21, the VDIG pin of another termination AD976A of the 5th electric capacity C20, the DGND ground connection of AD976A.
As shown in Figure 6, differential processing module mainly comprises: the 21 resistance R50, the 22 resistance R51, the 23 resistance R52, the 24 resistance R53, the 25 resistance R54, the 11 electric capacity C27, the first triode D2, the second triode D3, the 6th operational amplifier U3CA, the 7th operational amplifier U3DA.One termination+5V the voltage source of the 21 resistance R50, one end of the other end of the 21 resistance R50, one end of the 11 electric capacity C27, the 22 resistance R51, the M pole of the first triode D2, the M pole of the second triode D3, the negative input of the 7th operational amplifier U3DA connect the positive input of the 6th operational amplifier U3CA; The other end of the 22 resistance R51, the equal ground connection of the other end of the 11 electric capacity C27; The output terminal of the one termination A/D modular converter of the 23 resistance R52, and as the signal input part of differential processing module; The N pole of the other end of the 23 resistance R52, the P pole of the first triode D2, the first triode D2, the P pole of the second triode D3, the N pole of the second triode D3, the positive input of the 7th operational amplifier U3D connect the negative input of the 6th operational amplifier U2CA; One end of output termination the 24 resistance R53 of the 6th operational amplifier U3CA, the other end of the 24 resistance R53 is the first signal output part of differential processing module; Output termination the 25 resistance R54 one end of 7th operational amplifier U3DA, the other end of the 25 resistance R54 is the secondary signal output terminal of differential processing module.
Signal after difference processing has stronger antijamming capability and can adapt to the transmission of longer distance.
The specific works process of this circuit is: temperature sensing element perceives temperature signal, is linked into compensating circuit module; Compensating circuit model calling enters an input end of temperature signal amplification module; By the output terminal of active low-pass filter module jointing temp signal amplification module; Filtering completes to connect and be input to A/D modular converter after suitable amplification carries out sampling processing; Differential processing module obtains the output signal of this temperature sensing circuit after being processed by the input signal from A/D modular converter.
Claims (1)
1. the temperature sensing circuit of house refuse cracking waste plastics reaction, comprise temperature-compensation circuit module, temperature signal amplification module, active low-pass filter module, A/D modular converter, differential processing module, is characterized in that:
Temperature sensing element perceives temperature signal, is linked into compensating circuit module; An input end of the output terminal jointing temp signal amplification module of compensating circuit module; The output terminal of active low-pass filter module jointing temp signal amplification module; Connect the input end of A/D modular converter after filtering completes, the output termination differential processing module of A/D modular converter, the output terminal of differential processing module is as the output terminal of this temperature sensing circuit;
Described temperature-compensation circuit module comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, power supply V1; One end of the one termination second resistance R2 of the first resistance R1, node jointing temp induction element between first resistance R1 and the second resistance R2, described temperature sensing element is K type thermopair, the other end of one end of power supply V1, a termination first resistance R1 of the 3rd resistance R3, one end of another termination the 5th resistance R5 of power supply V1, one end of another termination the 4th resistance R4 of 3rd resistance R3, the input end of temperature signal amplification circuit module, the other end of the other end of the 4th resistance R4, another termination the 5th resistance R5 of the second resistance R2;
Described temperature signal amplification module comprises the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11 resistance R11, the 12 resistance R12, the first operational amplifier U1, the second operational amplifier U2, the 3rd operational amplifier U3, one end of 6th resistance R6, the output terminal of the one termination first operational amplifier U1 of the 9th resistance R9, the other end of the 6th resistance R6, the negative input of the first operational amplifier U1 connects one end of the 7th resistance R7, the other end of the 7th resistance R7, the positive input of the second operational amplifier U2 connects one end of the 8th resistance R8, the other end of the 8th resistance R8, one end of output termination the tenth resistance R10 of the second operational amplifier U2, the other end of the tenth resistance R10, the negative input of the 3rd operational amplifier U3 connects one end of the 12 resistance R12, the voltage of another termination-5V of the 12 resistance R12, the positive input of the 3rd operational amplifier U3, one end of another termination the 11 resistance R11 of the 9th resistance R9, the voltage V0 of the output terminal output temperature signal amplification module of another termination the 3rd operational amplifier U3 of the 11 resistance R11, wherein the first operational amplifier U1 positive supply connects+5V voltage, first operational amplifier U1 negative supply connects-5V voltage, second operational amplifier U2 positive supply connects+5V voltage, second operational amplifier U2 negative supply connects-5V voltage, 3rd operational amplifier U3 positive supply connects+5V voltage, and the 3rd operational amplifier U3 negative supply connects-5V voltage,
Described active low-pass filter module comprises the 13 resistance R13,14 resistance R14, the 15 resistance R15, the 16 resistance R16,17 resistance R17,18 resistance R18, the first electric capacity C11, the second electric capacity C12,3rd electric capacity C13,4th electric capacity C14, four-operational amplifier U4A, the 5th operational amplifier U5A, one end of 13 resistance R13, one end of 14 resistance R14, one end of the one termination second electric capacity C12 of the first electric capacity C11, the other end of the second electric capacity C12, one end of 15 resistance R15, the output terminal of the one termination four-operational amplifier U4A of the 16 resistance R16, the other end of the first electric capacity C11, another termination four-operational amplifier U4A negative input of the 15 resistance R15, four-operational amplifier U4A positive input ground connection, the other end ground connection of the 14 resistance R14, the other end of the 16 resistance R16, one end of 17 resistance R17, one end of one termination the 4th electric capacity C14 of the 3rd electric capacity C13, the other end of the 4th electric capacity C14, one termination the 5th operational amplifier U5A negative input of the 18 resistance R18, the other end of the 3rd electric capacity C13, the output terminal of another termination the 5th operational amplifier U5A of the 18 resistance R18, the positive input ground connection of the 5th operational amplifier U5A, 17 resistance R17 other end ground connection,
Described A/D modular converter comprises the 19 resistance R20, the 20 resistance R21, the 5th electric capacity C20, the 6th electric capacity C21, the 7th electric capacity C22, the 8th electric capacity C23, the 9th electric capacity C24, the tenth electric capacity C25, A/D change-over circuit AD976A, one end of 19 resistance R20, the Vin pin of the one termination AD976A of the 20 resistance R21, another termination power VCC of the 20 resistance R21, the anode of the 7th electric capacity C22, the VANA pin of the one termination AD976A of the 8th electric capacity C23, the negative terminal of the 7th electric capacity C22, the negative terminal of another termination the tenth electric capacity C25 of the 8th electric capacity C23, the CAP pin of the positive termination AD976A of the tenth electric capacity C25, the negative terminal of the 7th electric capacity C22, the negative terminal of another termination the 9th electric capacity C24 of the 8th electric capacity C23, the REF pin of the positive termination AD976A of the 9th electric capacity C24, the other end of the 8th electric capacity C23 also connects AGND1 pin and the AGND2 pin of AD976A respectively, the BYIE pin of AD976A, the CS pin ground connection of AD976A, the negative terminal of the 6th electric capacity C21, one end ground connection of the 5th electric capacity C20, the anode of the 6th electric capacity C21, the VDIG pin of another termination AD976A of the 5th electric capacity C20, the DGND ground connection of AD976A,
Described differential processing module comprises the 21 resistance R50, the 22 resistance R51, the 23 resistance R52, the 24 resistance R53, the 25 resistance R54, the 11 electric capacity C27, the first triode D2, the second triode D3, the 6th operational amplifier U3C, the 7th operational amplifier U3D; One termination+5V the voltage source of the 21 resistance R50, one end of the other end of the 21 resistance R50, one end of the 11 electric capacity C27, the 21 resistance R51, the M pole of the first triode D2, the M pole of the second triode D3, the negative input of the 7th operational amplifier U3D connect the positive input of the 6th operational amplifier U3C; The other end of the 22 resistance R51, the equal ground connection of the other end of the 11 electric capacity C27; The output terminal of the one termination A/D modular converter of the 23 resistance R52, and as the signal input part of differential processing module; The N pole of the other end of the 23 resistance R52, the P pole of the first triode D2, the first triode D2, the P pole of the second triode D3, the N pole of the second triode D3, the positive input of the 7th operational amplifier U3D connect the negative input of the 6th operational amplifier U2C; One end of output termination the 24 resistance R53 of the 6th operational amplifier U3C, the other end of the 24 resistance R53 is the first signal output part of differential processing module; Output termination the 25 resistance R54 one end of 7th operational amplifier U3D, the other end of the 25 resistance R54 is the secondary signal output terminal of differential processing module.
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| CN201310334173.2A CN103439022B (en) | 2013-08-02 | 2013-08-02 | The temperature sensing circuit of house refuse cracking waste plastics reaction |
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| CN201310334173.2A CN103439022B (en) | 2013-08-02 | 2013-08-02 | The temperature sensing circuit of house refuse cracking waste plastics reaction |
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| CN103439022B true CN103439022B (en) | 2015-08-12 |
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| CN105337534A (en) * | 2014-08-08 | 2016-02-17 | 北京谊安医疗系统股份有限公司 | Power consumption and temperature monitoring circuit for brushless direct current motor of anaesthesia machine |
| CN106248240B (en) * | 2016-08-15 | 2018-12-11 | 成都众山科技有限公司 | A kind of temperature transmitter with temperature-compensating |
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|---|---|---|---|---|
| US4135402A (en) * | 1976-08-25 | 1979-01-23 | Nippondenso Co., Ltd. | Thermocouple temperature detecting assembly |
| CN86204299U (en) * | 1986-06-21 | 1987-06-10 | 北京钢铁学院 | Digital thermometer |
| DE20107149U1 (en) * | 2000-04-30 | 2001-07-05 | Siemens Numerical Control Ltd | Temperature measuring circuit for injection molding machines |
| CN1796950A (en) * | 2004-12-29 | 2006-07-05 | 中国科学院空间科学与应用研究中心 | Temperature acquisition system in multiple channels suitable to examination of microgravity liquid |
| CN203414189U (en) * | 2013-08-02 | 2014-01-29 | 杭州电子科技大学 | Household refuse plastic waste cracking reaction temperature detection circuit |
-
2013
- 2013-08-02 CN CN201310334173.2A patent/CN103439022B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4135402A (en) * | 1976-08-25 | 1979-01-23 | Nippondenso Co., Ltd. | Thermocouple temperature detecting assembly |
| CN86204299U (en) * | 1986-06-21 | 1987-06-10 | 北京钢铁学院 | Digital thermometer |
| DE20107149U1 (en) * | 2000-04-30 | 2001-07-05 | Siemens Numerical Control Ltd | Temperature measuring circuit for injection molding machines |
| CN1796950A (en) * | 2004-12-29 | 2006-07-05 | 中国科学院空间科学与应用研究中心 | Temperature acquisition system in multiple channels suitable to examination of microgravity liquid |
| CN203414189U (en) * | 2013-08-02 | 2014-01-29 | 杭州电子科技大学 | Household refuse plastic waste cracking reaction temperature detection circuit |
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| Publication number | Publication date |
|---|---|
| CN103439022A (en) | 2013-12-11 |
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