CN104007323B - Engine power output rotary shaft torque signal matching box resistance detection circuit - Google Patents
Engine power output rotary shaft torque signal matching box resistance detection circuit Download PDFInfo
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- CN104007323B CN104007323B CN201410263828.6A CN201410263828A CN104007323B CN 104007323 B CN104007323 B CN 104007323B CN 201410263828 A CN201410263828 A CN 201410263828A CN 104007323 B CN104007323 B CN 104007323B
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Abstract
The invention provides an engine power output rotary shaft torque signal matching box resistance detection circuit. The engine power output rotary shaft torque signal matching box resistance detection circuit comprises a 5 V power supply unit, a -3.75 V power supply unit, a shaft torque signal matching box deviation resistor, a shaft torque signal matching box slope resistor, a slope resistor detection unit, a deviation resistor detection unit and an AD conversion unit. The 5 V power supply unit feeds a 5 V reference voltage to the AD conversion unit through the deviation resistor detection unit and the slope resistor detection unit for digital-to-analog conversion, the -3.75 V power supply unit is connected with the deviation resistor and the slope resistor in parallel to form a closed loop, the deviation resistor is in parallel connection with a connecting point between the 5 V power supply unit and the slope resistor, the 5 V reference voltage is fed to the AD conversion unit through the slope resistor to be processed through digital-to-analog conversion, and an engine electronic controller calculates the resistance value of the deviation resistor and the resistance value of the slope resistor according to the voltage obtained after conversion of the AD conversion unit and a resistor series connection formula. According to the engine power output rotary shaft torque signal matching box resistance detection circuit, the problems that working current of a rotary shaft torque signal matching box is overlarge, high temperature is generated, and an external matching box deviation resistor is damaged due to a short circuit are solved.
Description
Technical field
The present invention relates to the thermocouple of temperature T45 mates between a kind of monitoring aero-engine gas turbine and free turbine
The testing circuit of box, and the testing circuit of aeroengine power output shaft torque Signal Matching box.
Background technology
Torque sensor is divided into dynamic and static two also known as torque sensor, torsion torque sensor, torque sensor, torquemeter
Big class, wherein dynamic torque sensor can be called torque sensor, torque rotary speed sensor, non-contact torque sensor, rotation again
Torque sensor etc..Torque sensor is to the detection to torsional moment perception on various rotations or non-rotary mechanical part.
The physical change of torsion is converted into accurate electric signal by torque sensor.Torque sensor can be applied in manufacture viscosimeter,
Electronic (pneumatic, fluid power) torque spanner, it has high precision, and frequency response is fast, good reliability, the advantages of life-span length.Torque sensor
It is a kind of fine measuring instrument measuring various moments of torsion, rotating speed and mechanical output.Range of application is quite varied.With robot control system(RCS)
Constantly improve and development, the precision of torque sensor, reliability and response speed are put forward higher requirement.Engine temperature
Degree control box is responsible for limiting the maximum gas temperature of engine.Every engine has 4 thermocouple probes, is all fixed by screw
On turbine casing, to sense the temperature of turbine casing.Each probe is dual thermocouple probe, has 4 tie points pair respectively
Should be in the positive pole of two electric pathways of ECM Engine Control Module A and B and negative pole.The delivery temperature sensing is changed by thermocouple
For thermocouple detection circuit electrical potential difference, calculated by Electronic Control Unit EEC and show on display module.Aircraft engine temperature
Degree control box experiences engine exhaust temperature by thermocouple, controls delivery temperature to be less than setting.Reach in delivery temperature
During 700 DEG C of limits values, export corresponding signal, limit the quantity delivered of fuel oil, reduce delivery temperature；Reach 730 DEG C in delivery temperature
When send stop sign, stop to engine oil, make engine cut-off.When delivery temperature exceedes limiting temperature, to starting
Machine takes limit oil or parking toll, thus ensureing that engine exhaust temperature is less than setting.The quality of temperature control box performance
It is directly connected to the work safety of engine, such as it breaks down, gently then affect engine performance, heavy then cause the accident.Start
Machine delivery temperature shows that higher problem there is no thorough solution at present, each time change engine electronic control be required for
The trouble of Engine Matching.Because engine gas turbine-exit temperature T4 is too high, field monitoring is difficult, generally using monitoring combustion
Temperature T45 between air turbine and free turbine is measuring.Temperature T45 between gas turbine and free turbine and combustion gas whirlpool
There is interrelated relation, increasing temperature T45 with load can rise with temperature T4, and T45 temperature is surveyed between wheel outlet temperature T4
The precision of amount just determines T4 temperature.If limiting temperature T45 to be equal to limit T4.Prior art temp. controlling box common trouble is summarized
Getting up is exactly the temperature signal of temp. controlling box output error under certain delivery temperature, mainly has two kinds of situations：(1) do not arrive restriction
Temperature but cuts oil, parking, alarm, affects In-Flight Performance or causes flame-out in flight；(2) exceed limit temperature not cutting oil, stop
Car, alarm, burn out engine.The operation principle of temp. controlling box is：The thermo-electromotive force value that K-type thermocouple in jet pipe is exported by temp. controlling box
Relatively to judge engine whether overtemperature with the limit voltage ratio setting.During overtemperature, temperature signal modulated, amplify, demodulating, power
Amplify, alarm signal in output oil-feeding control signal and passenger cabin.During more than 700 DEG C, the square wave of output certain frequency and dutycycle
Signal limits fuel feed amount；During more than 730 DEG C, export continuous direct current signal fuel cut-off.The main of temp. controlling box detector is appointed
Business is simulation thermocouple work, and whether the temperature signal of measurement temp. controlling box output is correct.According to thermocouple operation principle, control D/
A output thermoelectrical potential, to temp. controlling box, temp. controlling box output temperature signal, is divided into two-way after temperature signal is conditioned：One tunnel enters I/O end
Mouth triggering is interrupted, and another road enters A/D sampling.Setting down trigger is bilateral edge, then in triggering when square-wave signal edge arrives
Disconnected, system proceeds to interrupt processing and carries out timing or sampling, completes temperature signal physical quantity, shows in real time simultaneously and preserves survey
Amount result.
Aero-engine has the thermocouple of 8 about in the circumferential arrangement of engine exhaust emission mouth, and these thermocouples are equal
Using parallel operation, so can reduce the individual difference of thermocouple, and make the detection of engine thermal galvanic couple more comprehensive.
But after every engine parallel thermocouple, still there is certain individual difference, in order that engine electronic control have general
Property, configure thermocouple matching box on the engine, by the slope resistance in the poor matching box of engine thermal galvanic couple and deviation resistance
To represent.
Content of the invention
The purpose of the present invention be in view of the shortcomings of the prior art part, provide one kind to be able to ensure that Shaft Torque signal
Accurately, the design maintenance for engine and its electronic controller provides easily engine power output to turn to matching box output voltage
Shaft torque signal matching box resistance detecting circuit, to solve the excessive generation higher temperatures of Shaft Torque Signal Matching box operating current
Degree, and the problem that outside matching box deviation resistive short is damaged.
The above-mentioned purpose of the present invention can be realized by following measures, a kind of engine power output revolving shaft torque signal
Matching box resistance detecting circuit, including 5V power supply unit, -3.75V power supply unit, shaft torque signal matching box deviation resistance with tiltedly
Rate resistance, slope resistance detector unit, deviation resistance detection unit and AD conversion unit it is characterised in that：5V power supply unit leads to
Cross slope resistance detector unit and deviation resistance detection unit and 5V reference voltage feeding AD conversion unit is carried out digital-to-analogue conversion ,-
Deviation resistance and slope resistance compose in parallel closed loop to 3.75V power supply unit in parallel, and deviation resistor coupled in parallel is powered in 5V
On contact between unit and slope resistance, by slope resistance detector unit, 5V reference voltage feeding AD conversion unit is carried out
Digital-to-analogue conversion, engine electronic control, according to the voltage after AD conversion cell translation, calculates according to resistant series formula partially
Difference resistance and the resistance of slope resistance.
Shaft Torque signal using above-mentioned engine power output revolving shaft torque signal matching box resistance detecting circuit
Join box, combine linear array and slope resistance combination linear array, its feature including the deviation resistance being connected with engine work(electronic controller
It is：Deviation resistance combination linear array is in series by resistance R1～R8, and slope resistance combination linear array is by resistance R9～R16 series connection
Become, and every resistance two ends end is independent shunt circuit by printed conductor short circuit, in every resistance printed conductor input
On be equipped with measurement actual for scene, that accesses measurement resistance in circuit blocks node；Electronic controller is examined by slope resistance
Slowdown monitoring circuit measures the various combination value of slope resistance R9～R16, obtains corresponding slope resistance RTiltedly, measured deviation resistance R1～R8
Various combination value, obtain corresponding deviation resistance RPartially,
The present invention has the advantages that.
The present invention adopt 5V power supply unit, -3.75V power supply unit parallel connection Shaft Torque Signal Matching box deviation resistance with tiltedly
Rate resistance, by slope resistance detector unit, deviation resistance detection unit AD conversion unit, 5V reference voltage is sent into AD conversion
Unit carries out digital-to-analogue conversion, engine electronic control according to the voltage after AD conversion cell translation, according to resistant series formula
The resistance calculating deviate resistance and slope resistance ensure that output voltage is accurate, it is to avoid Shaft Torque Signal Matching box work electricity
Flow through big generation higher temperature, and the problem that outside matching box deviation resistive short is damaged.By the supporting mode of matching box
The individual difference slope of engine output shaft sensor and deviation resistance are indicated, engine electronic control system
Device just can be designed as universal, is that the design maintenance of engine and its electronic controller provides a great convenience.
The present invention only needs to gather drift correction resistance value and Gradient correction resistance value, you can obtain the deviation of this engine
Correction factor and Gradient correction coefficient, thus having exempted from but to carry out the trouble of parameter adjustment in outfield, can avoid changing each time
Engine electronic control is required for the trouble with Engine Matching, significantly improves the efficiency of engine outfield guarantee.
Brief description
Fig. 1 is inventive engine power output Shaft Torque Signal Matching box resistance detecting circuit block diagram.
Fig. 2 is the testing circuit principle schematic of Fig. 1.
Fig. 3 is the circuit theory schematic diagram of Shaft Torque Signal Matching box.
Specific embodiment
Refering to Fig. 1.Engine power output revolving shaft torque signal matching box resistance detecting circuit is mainly powered list by 5V
Unit, -3.75V power supply unit, slope resistance detector unit, deviation resistance detection unit and AD conversion unit composition.5V powers list
5V reference voltage feeding AD conversion unit is carried out digital-to-analogue conversion, -3.75V by slope resistance and deviation resistance detection unit by unit
Deviation resistance and slope resistance compose in parallel closed loop to power supply unit in parallel, deviation resistor coupled in parallel 5V power supply unit with
On contact between slope resistance, 5V reference voltage feeding AD conversion unit is carried out by digital-to-analogue by slope resistance detector unit and turns
Change, engine electronic control, according to the voltage after AD conversion cell translation, calculates, according to resistant series formula, the resistance that deviates
Resistance with slope resistance.
Refering to Fig. 2.5V power supply unit is connected in parallel on by 5V reference voltage input resistance R1, earth electric capacity C1, bridging
Operational amplifier U1A reverse input end integrating capacitor C2 in parallel with output end and the resistance R5 being connected in parallel on described U1A output end
Parallel resistance R3 composition.The 5V reference voltage providing inside engine electronic control hinders through resistance R1 and ground capacity C1
To the anode of U1A amplifier after anti-coupling and filtering, because the input of U1A negative terminal does not have earth resistance, U1A amplifier is to penetrate with putting
Big device, the public anode of its output 5V voltage to slope resistance R12 and deviation resistance R11.Integrating capacitor C2 can allow output electric
Pressure is more stable, ripple is little, and resistance R5 is output current limiting resistance, and resistance R3 is 5V output end feedback resistance it can be ensured that passing through limit
Output voltage after leakage resistance R5 is 5V.
- 3.75V power supply unit is by 5V reference voltage input resistance R9, to be connected in parallel on operational amplifier U1B reversely defeated for bridging
Enter the parallel resistance R10 composition held integrating capacitor C3 in parallel with output end and be connected in parallel on the resistance R6 of described U1B output end.Send out
The 5V reference voltage providing inside motivation electronic controller inputs through the negative terminal of R9 to U1B amplifier, and U1B amplifier anode is straight
Ground connection, U1B output voltage is equal to 5V × (- R10 ÷ R9).The resistance of Rational choice resistance R9 and R10 just can allow U1B defeated
Go out -3.75V voltage, in order to ensure output voltage accurately, resistance R9 and R10 adopts resistance accuracy to be less than 0.1%, and temperature is waftd and is less than
The precision resistance of 10ppm/K.U1B output -3.75V voltage is coupled with deviation resistance R11 and slope resistance R12 output series electrical
The negative terminal of resistance R7 and R8.Integrating capacitor C3 can allow output voltage is more stable, ripple is little, and resistance R6 is output current limiting resistance, electricity
Resistance R10 is 5V output end feedback resistance,
Deviation resistance detection unit includes deviation resistant series resistance R2 earth electric capacity C4 and operational amplifier U2A.
Slope resistance detector unit includes slope resistance series resistance R4 earth electric capacity C5 and operational amplifier U2B.
The 5V voltage of operational amplifier U1A output arrives deviation resistance detection unit resistance R7 after deviation resistance R11, so
Return to the output of -3.75V power supply unit afterwards and form current loop after resistance R7.Electric current so in deviation resistance detection loop
Intensity is (5V+3.75V) ÷ (R11+R7), and the voltage on resistance R7 arrives U2A after resistance R2 and electric capacity C4 current limliting and filtering
Amplifier, U2A penetrates input voltage with delivering to AD converter process after amplifying, and engine electronic control is according to the electricity after conversion
Pressure can calculate the resistance of R11 according to resistant series formula.Guaranteeing 5V voltage and the very accurate premise of -3.75V voltage
Under, resistance R7 is very crucial here, and in order to ensure the degree of accuracy measuring, resistance R7 adopts resistance accuracy to be less than 0.1%, and temperature is waftd
Less than 10ppm/K, resistance in tens K about precision resistance.In order to avoid operating current excessive generation higher temperature, and outward
Portion's matching box deviation resistive short damages this resistance, and this resistance must guarantee will not send out during resistance performance using the larger resistance of power
Heat.
The 5V voltage of operational amplifier U1A output in the same manner arrives slope resistance detector unit resistance after deviation resistance R12
R8, returns to the output of -3.75V power supply unit and forms current loop after being then passed through resistance R8；So in deviation resistance detection loop
Current strength be (5V+3.75V) ÷ (R12+R7), the voltage on R8 arrives after resistance R4 and electric capacity C5 current limliting and filtering
U2B amplifier, U2B by input voltage penetrate with amplify after deliver to AD converter process, engine electronic control according to conversion after
Magnitude of voltage calculate the resistance of R12 according to resistant series formula.Before guaranteeing that 5V voltage and -3.75V voltage are very accurate
Put, resistance R8 is very crucial here, in order to ensure the degree of accuracy measuring, resistance R8 adopts resistance accuracy to be less than 0.1%, temperature
Waft less than 10ppm/K, resistance in tens K about precision resistance.In order to avoid operating current excessive generation higher temperature, and
Outside matching box this resistance of slope resistance Damage by Short Circuit, this resistance must be guaranteed using the larger resistance of power will not during resistance performance
Heating.
When the slope resistance R12 in outside matching box and deviation resistance R11 short circuit, because 5V power supply unit has resistance R5
Current limliting, -3.75V power supply unit limited leakage resistance R6, deviation resistance R11 export Series power larger resistance R7, and slope resistance is defeated
Go out Series power larger resistance R8, so matching box testing circuit will not burn out, the voltage on resistance R7 and R8 is 8.75V simultaneously
Left and right, indicates that external circuit short circuit through AD conversion rear engine electronic controller；When the slope electricity in outside matching box
During resistance R12 and deviation resistance R11 open circuit, in measure loop, there is no current strength, the voltage on resistance R7 and R8 is that -3.75V is left
The right side, indicates that external circuit open circuit through AD conversion rear engine electronic controller.
Torque signal matching box is made up of deviation resistance and slope resistance two parts, if representing Gradient correction coefficient with a,
B represents drift correction value, then torque value correction value=torque measurement × (1+a)+b.By the supporting mode of matching box just
The individual difference slope of engine output shaft sensor and deviation resistance can be indicated, Motronic control maps
Controller just can be designed as universal, is that the design maintenance of engine and its electronic controller provides a great convenience.
Engine electronic control passes through to detect that matching box inputs slope resistance and the size of deviation resistance just can identify
The individual difference of engine thermal galvanic couple.If representing Gradient correction coefficient with a, b represents drift correction value, then thermocouple correction
Value=thermocouple measurements × (1+a)+b, thus can make up the error that thermocouple is brought, Motronic control maps control due to difference
Device processed just can be designed as universal, equally can provide greatly just for the design maintenance of engine and its electronic controller
Profit.
Refering to Fig. 3.The Shaft Torque Signal Matching of temperature T45 between monitoring aero-engine gas turbine and free turbine
Box, combines linear array and slope resistance combination linear array including the deviation resistance being connected with electronic controller.Every resistance two ends end is equal
It is independent shunt circuit by printed conductor short circuit, every resistance printed conductor input is equipped with and surveys for scene is actual
Amount, in access circuit, measurement resistance blocks node；Electronic controller measures slope resistance by slope resistance testing circuit
The various combination value of R9～R16, obtains corresponding slope resistance RTiltedly, electronic controller measured by deviation resistance detecting circuit
The various combination value of deviation resistance R1～R8, obtains corresponding deviation resistance RPartially, and according to following formula slope calculations correction factor a and
Drift correction coefficient b:
In formula, C1、C2It is the constant being obtained according to test data, then can be calculated by formula T4=a × T45+b corresponding
T4 temperature value.End points 19 is common port, and end points 17 and end points 19 are deviation resistance output end, and end points 18 and end points 19 are slope electricity
Resistance output end.
Deviation resistance combination linear array is in series by the deviation resistance R1～R8 in independent shunt circuit.In deviation resistance group
In zygonema battle array, by printed conductor short circuit, printed conductor is provided with 1～8 numbering and blocks node every resistance, due to node and right
The resistance answered is parallel relationship, independent shunt circuit can be selected to block node 1～8 according to the parallel relationship of the corresponding resistance of node
In a certain node, you can by corresponding for this node resistance access above-mentioned deviation resistance combination linear array circuit in, combination obtain
Required deviation resistance RPartially.Such as according to live actual measured value, RPartially=R1+R3+R6, then operating personnel can by independent simultaneously
Connection loop node 1 is drilled with little electric drill, and the simultaneously line at resistance R1 two ends disconnects, and R1 accesses circuit effectively, and operating personnel can in the same manner
Independent shunt circuit node 3,6 is drilled with little electric drill, R3, R6 access circuit effectively, remaining R2, R4, R5, R7, R8 by
In by track short circuit in parallel, therefore it is invalid to access circuit.According to live actual measured value needs, combine linear array in deviation resistance
In circuit, the independent shunt circuit of one of or several selection is selected to block node, the total deviation resistance required for combination acquisition
RPartially.
Slope resistance combination linear array is in series by the slope resistance R9～R16 in independent shunt circuit.In slope resistance
In combination linear array, by printed conductor short circuit, printed conductor is provided with 9～16 numberings and blocks node, due to node every resistance
It is parallel relationship with corresponding resistance, independent shunt circuit can be selected to block node 9 according to the parallel relationship of the corresponding resistance of node
A certain node in～16, you can corresponding for this node resistance is accessed in above-mentioned deviation resistance combination linear array circuit, combination
Slope resistance R required for obtainingTiltedly.Such as according to live actual measured value, RTiltedly=R10+R14+R16, then operating personnel will save
Point 10 is drilled with little electric drill, resistance R10 two ends and line disconnect, R10 accesses circuit effectively, and operating personnel are by node in the same manner
14th, 16 drilled with little electric drill, R14, R16 access circuit effectively, and remaining R9, R11, R12, R13, R15 are due to by print in parallel
Line short circuit processed, therefore it is invalid to access circuit.According to live actual measured value needs, in slope resistance combination linear array, select wherein
Node is blocked in the independent shunt circuit of one or several selection, and combination obtains required total slope resistance RTiltedly.
Claims (10)
1. a kind of engine power output revolving shaft torque signal matching box resistance detecting circuit, including 5V power supply unit, -3.75V
Power supply unit, the deviation resistance R11 being arranged in Shaft Torque Signal Matching box and slope resistance R12, slope resistance detection are single
Unit, deviation resistance detection unit and AD conversion unit it is characterised in that：5V power supply unit is by output end slope resistance in parallel
5V reference voltage is sent into AD conversion by R12, deviation resistance R11 electrical connection slope resistance detector unit and deviation resistance detection unit
Unit carries out analog-to-digital conversion, and wherein, contact electrical connection -3.75V powers list in parallel for slope resistance R12, deviation resistance R11
Unit, -3.75V power supply unit passes through deviation resistance detection unit and deviation resistance R11 and forms current loop with 5V power supply unit,
And -3.75V power supply unit forms current loop also by slope resistance detector unit and slope resistance R12 with 5V power supply unit,
5V reference voltage feeding AD conversion unit is carried out analog-to-digital conversion, slope electricity by deviation resistance detection unit by deviation resistance R11
5V reference voltage feeding AD conversion unit is carried out analog-to-digital conversion, Motronic control maps control by slope resistance detector unit by resistance R12
Device processed calculates according to the voltage after AD conversion cell translation and resistant series formula and deviates resistance R11's and slope resistance R12
Resistance.
2. engine power output revolving shaft torque signal matching box resistance detecting circuit as claimed in claim 1, its feature exists
In：5V power supply unit is by resistance R1, electric capacity C1, operational amplifier U1A, integrating capacitor C2, resistance R3 and resistance R5 composition, resistance
One end of R1 is 5V reference voltage input, and the other end of resistance R1 and electric capacity C1 one end concatenation operation amplifier U1A forward direction are defeated
Enter end, the electric capacity C1 other end is grounded, the bridging of integrating capacitor C2 be connected in parallel on operational amplifier U1A reverse input end and output end it
Between, operational amplifier U1A output end connects one end of resistance R5, and resistance R3 bridging is connected in parallel on operational amplifier U1A and reversely inputs
Between end and the other end of resistance R5.
3. engine power output revolving shaft torque signal matching box resistance detecting circuit as claimed in claim 2, its feature exists
In：The 5V reference voltage providing inside engine electronic control is after resistance R1 and electric capacity C1 impedance matching and filtering to fortune
Calculate amplifier U1A positive input, operational amplifier U1A be penetrate with amplifier, its output 5V voltage arrive slope resistance R12 with
The public anode of deviation resistance R11.
4. engine power output revolving shaft torque signal matching box resistance detecting circuit as claimed in claim 3, its feature exists
In：- 3.75V power supply unit is made up of resistance R9, operational amplifier U1B, integrating capacitor C3, resistance R10 and resistance R6, resistance R9
One end be 5V reference voltage input, the other end concatenation operation amplifier U1B reverse input end of resistance R6, integrating capacitor
C3 bridging is connected in parallel between operational amplifier U1B reverse input end and output end, and the output end of operational amplifier U1B connects resistance
One end of R6, resistance R10 bridging is connected in parallel on the other end of operational amplifier U1B reverse input end and resistance R6.
5. engine power output revolving shaft torque signal matching box resistance detecting circuit as claimed in claim 4, its feature exists
In：The 5V reference voltage providing inside engine electronic control through the reverse input end of resistance R9 to operational amplifier U1B,
Operational amplifier U1B positive input is directly grounded, and U1B output voltage is equal to 5V × (- R10 ÷ R9).
6. engine power output revolving shaft torque signal matching box resistance detecting circuit as claimed in claim 3, its feature exists
In：The 5V voltage of operational amplifier U1A output arrives the resistance R7 of deviation resistance detection unit after deviation resistance R11, then
Return to the output of -3.75V power supply unit and form current loop after resistance R7, thus defining deviation resistance detection loop, this
Current strength in sample deviation resistance detection loop is（5V+3.75V）÷(R11+R7).
7. engine power output revolving shaft torque signal matching box resistance detecting circuit as claimed in claim 6, its feature exists
In：The 5V voltage of operational amplifier U1A output arrives the resistance R8 of slope resistance detector unit after slope resistance R12, then
Return to the output of -3.75V power supply unit and form current loop after resistance R8；This current loop is slope resistance measure loop,
And the current strength of this slope resistance measure loop is（5V+3.75V）÷ (R12+R8), the voltage on resistance R8 is through resistance
Operational amplifier U2B is arrived, input voltage is penetrated and delivered to AD with after amplifying by operational amplifier U2B after R4 and electric capacity C5 current limliting and filtering
Converting unit is processed, and engine electronic control calculates slope electricity according to the magnitude of voltage after conversion with according to resistant series formula
The resistance of resistance R12.
8. engine power output revolving shaft torque signal matching box resistance detecting circuit as claimed in claim 1, its feature exists
In：Shaft Torque Signal Matching box is made up of deviation resistance R11 and slope resistance R12 two parts, represents Gradient correction system with a
Number, b represents drift correction value, then torque value correction value=torque measurement ×（1+a）+b.
9. a kind of usage right requires the rotating shaft of engine power output revolving shaft torque signal matching box resistance detecting circuit described in 1
Torque signal matching box, including：The deviation resistance being connected with engine electronic control combines linear array and slope resistance group zygonema
Battle array it is characterised in that：Deviation resistance combination linear array is formed by 8 resistant series, and slope resistance combination linear array is by other 8 resistance
It is in series, and every resistance two ends are independent shunt circuit by printed conductor short circuit, defeated in every resistance printed conductor
Enter to hold and be equipped with measurement actual for scene, in access circuit, measurement resistance blocks node.
10. the rotating shaft of engine power output revolving shaft torque signal matching box resistance detecting circuit as claimed in claim 9 is turned round
Square Signal Matching box it is characterised in that：In deviation resistance combination linear array, every resistance by printed conductor short circuit, lead by printing
Line is provided with 1～8 numbering and blocks node, according to the parallel relationship of the corresponding resistance of node, selects independent shunt circuit to block node 1
A certain node in～8, you can corresponding for this node resistance is accessed and combines in the circuit of linear array in deviation resistance, combination obtains
The deviation resistance needing；In slope resistance combination linear array, by printed conductor short circuit, printed conductor is provided with 9 to every resistance
～16 numberings block node, according to the parallel relationship of the corresponding resistance of node, select independent shunt circuit to block in node 9～16
A certain node, you can corresponding for this node resistance is accessed and combines in the circuit of linear array in above-mentioned slope resistance, combination obtains institute
The slope resistance needing.
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