CN202158919U - Two-way torque test display circuit of electric eddy current dynamometer and electric eddy current dynamometer - Google Patents
Two-way torque test display circuit of electric eddy current dynamometer and electric eddy current dynamometer Download PDFInfo
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- CN202158919U CN202158919U CN 201120259645 CN201120259645U CN202158919U CN 202158919 U CN202158919 U CN 202158919U CN 201120259645 CN201120259645 CN 201120259645 CN 201120259645 U CN201120259645 U CN 201120259645U CN 202158919 U CN202158919 U CN 202158919U
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- current dynamometer
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Abstract
The utility model relates to a two-way torque test display circuit of an electric eddy current dynamometer and the electric eddy current dynamometer. The two-way torque test display circuit comprises a signal conditioning amplifying circuit used for being connected with the signal output end of a pull pressure sensor, the output end of the signal conditioning amplifying circuit is connected with a programmable analog-to-digital (A/D) converter, and the signal output end of the A/D converter is connected with the signal input end of a computer. The electric eddy current dynamometer and the two-way torque test display circuit adopt the programmable A/D converter, are matched with the computer to utilize software to achieve collection processing and visual operation and display of torque signals, are capable of collecting and processing positive voltage and negative voltage signals to recognize forward and reverse rotation and forward and reverse torque of a prime mover, resolve the problem that the torque can only collect one-way torque, the dynamometer is inconvenient to operate and poor in display performance, resolve the problem of two-way collection display of the torque of the electric eddy current dynamometer in motor tests, and improve operational performance and practicability of a system.
Description
Technical field
The utility model relates to a kind of electric eddy current dynamometer double-direction twist moment test display circuit and electric eddy current dynamometer thereof.
Background technology
The effect of electric eddy current dynamometer main frame is to utilize electric current to produce current vortex and then formation electromagnetic field, gives a kind of special device of the rotating machinery application of force through the rotation of rotor in magnetic field.It need use the tension-compression sensor of strain slice structure to measure moment of torsion; Because the sensitivity of pull pressure sensor is low; Amplitude output signal is little, and great majority are to adopt direct current to amplify to the measurement display circuit of electric eddy current dynamometer pull pressure sensor, demonstrate torque value by voltage table with voltage form again; The measuring error of this torque measurement display circuit is big, the measuring accuracy demand that incompatibility is present; The another kind of display circuit of measuring is to adopt signal amplification circuit (transmitter) to handle the simulating signal of pull pressure sensor output; Carry out the A/D conversion by A/D converter then; Digital quantity after will changing is again sent in the single-chip microcomputer signal handled and is exported display device again to and show; The shortcoming of sort circuit is that the apparent precision of survey is low, generally all is eight.Said structure one is because the tension-compression sensor of strain slice structure can produce drift zero point after receiving the conversion of pulling force and pressure, thereby the torque measurement precision is affected; The 2nd, owing to can't judge that moment of torsion is positive and negative, in the motor experiment process, during the motor speed switching-over, need outside wire jumper or reset inconvenient operation.
The utility model content
The purpose of the utility model provides a kind of electric eddy current dynamometer double-direction twist moment test display circuit; Because zero point drift causes precision low and can't judge the problem that moment of torsion is positive and negative, a kind of electric eddy current dynamometer that uses this double-direction twist moment test display circuit is provided simultaneously to solve existing torsion-testing circuit.
For realizing above-mentioned purpose; The technical scheme of the electric eddy current dynamometer double-direction twist moment test display circuit that the utility model provides is following: a kind of electric eddy current dynamometer double-direction twist moment test display circuit; Comprise and be used for the signal condition amplifying circuit that is connected with the pull pressure sensor signal output part; The output terminal of said signal condition amplifying circuit connects a programmable A/D converter, and the signal output of said programmable A/D converter is connected with the signal input of computing machine.
Said programmable A/D converter adopts the PCL-813 integrated circuit board, and this PCL-813 integrated circuit board inserts in the ISA slot of computing machine, and the output of the signal of PCL-813 integrated circuit board is connected with the signal input of computing machine through isa bus.
Said signal condition amplifying circuit adopts amplifier INA114, and the electrode input end of said amplifier is used for being connected with the pull pressure sensor signal output part with negative input, and the output terminal of amplifier is connected with the signal input of programmable A/D converter; Be serially connected with adjusting resistance between 1 pin of said amplifier INA114 and 8 pin.
Be serially connected with a filter capacitor respectively between electrode input end 3 pin of said amplifier INA114 and negative input 2 pin and the ground.
The technical scheme of the electric eddy current dynamometer that the utility model provides is following: a kind of electric eddy current dynamometer; Comprise inductor, armature and excitation unit and device for measuring force; Said device for measuring force comprises pull pressure sensor and double-direction twist moment test display circuit; Said double-direction twist moment test display circuit comprises and is used for the signal condition amplifying circuit that is connected with the pull pressure sensor signal output part; The output terminal of said signal condition amplifying circuit connects a programmable A/D converter, and the signal output of said programmable A/D converter is connected with the signal input of computing machine.
Said programmable A/D converter adopts the PCL-813 integrated circuit board, and this PCL-813 integrated circuit board inserts in the ISA slot of computing machine, and the output of the signal of PCL-813 integrated circuit board is connected with the signal input of computing machine through isa bus.
Said signal condition amplifying circuit adopts amplifier INA114, and the electrode input end of said amplifier is used for being connected with the pull pressure sensor signal output part with negative input, and the output terminal of amplifier is connected with the signal input of programmable A/D converter; Be serially connected with adjusting resistance between 1 pin of said amplifier INA114 and 8 pin.
Be serially connected with a filter capacitor respectively between electrode input end 3 pin of said amplifier INA114 and negative input 2 pin and the ground.
Electric eddy current dynamometer of the utility model and double-direction twist moment thereof are tested display circuit owing to adopt programmable A/D converter, and cooperate collection, processing, visualized operation, the demonstration that utilizes software to realize torque signal with computing machine.Through acquisition software, forward, reverse 2 zero points are set, avoided the zero point drift problem of S type metal strain chip pressure transducer after process receives the conversion of pulling force pressure.But because its acquisition process positive/negative voltage signal; The rotation forward or backwards that can discern prime mover thus reaches moment of torsion forward or backwards; Solve torque meter and can only gather unidirectional torque, and the problem that operation is inconvenient, demonstration property is not strong, satisfied the requirement of the torque parameter of each machine of electric eddy current dynamometer; Solve the problem that the two-way collection of the moment of torsion of electric eddy current dynamometer when electromechanical testing shows, improved the operability and the practicality of system.
Description of drawings
Fig. 1 is the principle schematic of the utility model electric eddy current dynamometer double-direction twist moment test display circuit;
Fig. 2 is the principle schematic of the utility model electric eddy current dynamometer double-direction twist moment test display circuit embodiment;
Fig. 3 is the circuit diagram of signal condition amplifying circuit;
Fig. 4 is the utility model electric eddy current dynamometer device for measuring force circuit theory diagrams.
Embodiment
Below in conjunction with concrete embodiment the utility model is done further introduction.
Be illustrated in figure 1 as the former road figure of the utility model electric eddy current dynamometer double-direction twist moment test display circuit; Can know by figure; This circuit comprises and is used for the signal condition amplifying circuit that is connected with the pull pressure sensor signal output part; The output terminal of signal condition amplifying circuit connects a programmable A/D converter, and the signal output of programmable A/D converter is connected with the signal input of computing machine.
As shown in Figure 2, the programmable A in the present embodiment/D converter adopts and grinds magnificent PCL-813 integrated circuit board, and this PCL-813 integrated circuit board inserts in the ISA slot of computing machine, and the output of the signal of PCL-813 integrated circuit board is connected with the signal input of computing machine through isa bus.
As shown in Figure 3; The signal condition amplifying circuit of present embodiment adopts amplifier INA114; Electrode input end 3 pin of amplifier are used for being connected with the pull pressure sensor signal output part with negative input 2 pin, and output terminal 6 pin of amplifier are connected with the input of the signal of programmable A/D converter.Be serially connected with between 1 pin of amplifier INA114 and 8 pin and regulate resistance R 11, this resistance is used to set the enlargement factor of amplifier; Be serially connected with a filter capacitor C53 and C52 respectively between the electrode input end of amplifier INA114 and negative input 2 pin and the ground; It can play inhibiting effect to the electrical Interference that is sent by strain gauge drawing force and compression force transducer, thereby improves the antijamming capability of circuit.4 pin of amplifier 114 connect-12V, and 7 pin connect+12V, 5 pin ground connection.
Be illustrated in figure 4 as the principle schematic of the utility model electric eddy current dynamometer; This electric eddy current dynamometer comprises inductor, armature and excitation unit and device for measuring force; Device for measuring force comprises pull pressure sensor and double-direction twist moment test display circuit, and said double-direction twist moment test display circuit as stated.
The principle of work of electric eddy current dynamometer is following: inductor produces the eddy current place on the hole wall of magnetic conduction eddy current ring; Field copper is logical to be gone up after the direct current; Then produce a closed magnetic flux around field copper, when inductor during by prime mover driven rotary, air gap flux density is with the rotation generating period property variation of inductor; In eddy current annular distance wall surface and certain depth scope, will produce the eddy current electromotive force; And the generation eddy current, the formed magnetic field of this eddy current interacts with air-gap field again, has just produced braking torque.This moment of torsion reaches on the device for measuring force through outer shroud and power transmission arm, by the pull pressure sensor of measurement mechanism the size conversion of power is become electric signal output, thereby reaches the purpose of measuring moment of torsion.
The course of work of the utility model double-direction twist moment test display circuit is following: the millivolt deformation signal of the stressed generation of pull pressure sensor of strain slice structure; Through precision operational-amplifier INA114 convert to-5V-+5V voltage signal output, wherein both positive and negative voltage is represented pulling force or the pressure that the tension-compression sensor of strain slice structure receives respectively.Moment of torsion voltage signal through amplifying outputs on the A/D analog quantity tablet PCL-813, converts digital signal to.This plate is installed in Computer I SA slot, and it possesses 32 road A/D ALT-CH alternate channels, can gather the multichannel torque signal simultaneously; Resolution reaches 12; The highest sampling rate 25KHz can realize the quick collection to torque signal; Its precision can reach 0.01% ± 1LSB of reading numerical values; This analog quantity tablet can carry out bipolar processes to input signal, read-5V-+the 5V voltage signal.Computing machine reads the torque signal that converts digital quantity into through isa bus; Adopt delphi software programming program, directly read the moment of torsion digital quantity, be converted into the moment of torsion quantities from isa bus.Software can be gathered demarcation to double-direction twist moment respectively, and pulling force, pressure possess two zero points, two full scales, and its radix point, alarm set point can set arbitrarily, and can judge that prime mover turns to through to the positive and negative collection of moment of torsion.
The electric eddy current dynamometer double-direction twist moment of the utility model test display circuit since torque value finally in the computer software interface display, functions such as the setting of the zeroing of torque value, demarcation, quantities, scale, warning all can be accomplished through software cross section window-operating.Can realize collection, processing, visualized operation, the demonstration of torque signal.Through acquisition software, forward, reverse 2 zero points are set, avoided the zero point drift problem of S type metal strain chip pressure transducer after process receives the conversion of pulling force pressure.But because its acquisition process positive/negative voltage signal; The rotation forward or backwards that can discern prime mover thus reaches moment of torsion forward or backwards; Solve torque meter and can only gather unidirectional torque, and the problem that operation is inconvenient, demonstration property is not strong, satisfied the requirement of the torque parameter of each machine of electric eddy current dynamometer; Solve the problem that the two-way collection of the moment of torsion of electric eddy current dynamometer when electromechanical testing shows, improved the operability and the practicality of system.
Claims (8)
1. an electric eddy current dynamometer double-direction twist moment is tested display circuit; It is characterized in that: comprise being used for the signal condition amplifying circuit that is connected with the pull pressure sensor signal output part; The output terminal of said signal condition amplifying circuit connects a programmable A/D converter, and the signal output of said programmable A/D converter is connected with the signal input of computing machine.
2. electric eddy current dynamometer double-direction twist moment test display circuit according to claim 1; It is characterized in that: said programmable A/D converter adopts the PCL-813 integrated circuit board; This PCL-813 integrated circuit board inserts in the ISA slot of computing machine, and the output of the signal of PCL-813 integrated circuit board is connected with the signal input of computing machine through isa bus.
3. electric eddy current dynamometer double-direction twist moment test display circuit according to claim 1 and 2; It is characterized in that: said signal condition amplifying circuit adopts amplifier INA114; The electrode input end of said amplifier is used for being connected with the pull pressure sensor signal output part with negative input, and the output terminal of amplifier is connected with the signal input of programmable A/D converter; Be serially connected with adjusting resistance between 1 pin of said amplifier INA114 and 8 pin.
4. electric eddy current dynamometer double-direction twist moment test display circuit according to claim 3 is characterized in that: be serially connected with a filter capacitor respectively between electrode input end 3 pin of said amplifier INA114 and negative input 2 pin and the ground.
5. electric eddy current dynamometer; Comprise inductor, armature and excitation unit and device for measuring force; Said device for measuring force comprises pull pressure sensor and double-direction twist moment test display circuit; It is characterized in that: said double-direction twist moment test display circuit comprises and is used for the signal condition amplifying circuit that is connected with the pull pressure sensor signal output part; The output terminal of said signal condition amplifying circuit connects a programmable A/D converter, and the signal output of said programmable A/D converter is connected with the signal input of computing machine.
6. electric eddy current dynamometer according to claim 5; It is characterized in that: said programmable A/D converter adopts the PCL-813 integrated circuit board; This PCL-813 integrated circuit board inserts in the ISA slot of computing machine, and the output of the signal of PCL-813 integrated circuit board is connected with the signal input of computing machine through isa bus.
7. according to claim 5 or 6 described electric eddy current dynamometers; It is characterized in that: said signal condition amplifying circuit adopts amplifier INA114; The electrode input end of said amplifier is used for being connected with the pull pressure sensor signal output part with negative input, and the output terminal of amplifier is connected with the signal input of programmable A/D converter; Be serially connected with adjusting resistance between 1 pin of said amplifier INA114 and 8 pin.
8. electric eddy current dynamometer according to claim 7 is characterized in that: be serially connected with a filter capacitor respectively between electrode input end 3 pin of said amplifier INA114 and negative input 2 pin and the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120259645 CN202158919U (en) | 2011-07-21 | 2011-07-21 | Two-way torque test display circuit of electric eddy current dynamometer and electric eddy current dynamometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120259645 CN202158919U (en) | 2011-07-21 | 2011-07-21 | Two-way torque test display circuit of electric eddy current dynamometer and electric eddy current dynamometer |
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| Publication Number | Publication Date |
|---|---|
| CN202158919U true CN202158919U (en) | 2012-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120259645 Expired - Lifetime CN202158919U (en) | 2011-07-21 | 2011-07-21 | Two-way torque test display circuit of electric eddy current dynamometer and electric eddy current dynamometer |
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| CN (1) | CN202158919U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721496A (en) * | 2012-06-27 | 2012-10-10 | 青岛前哨风动工具制造技术有限公司 | Novel vortex dynamometer |
| CN105182231A (en) * | 2015-05-17 | 2015-12-23 | 成都诚邦动力测试仪器有限公司 | Eddy current dynamometer system based on bootstrap control drive |
| CN109084672A (en) * | 2018-08-15 | 2018-12-25 | 北京中航惠通自动化技术有限公司 | Magnetostrictive displacement sensor is precisely controlled formula electric pushrod built in a kind of |
-
2011
- 2011-07-21 CN CN 201120259645 patent/CN202158919U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721496A (en) * | 2012-06-27 | 2012-10-10 | 青岛前哨风动工具制造技术有限公司 | Novel vortex dynamometer |
| CN105182231A (en) * | 2015-05-17 | 2015-12-23 | 成都诚邦动力测试仪器有限公司 | Eddy current dynamometer system based on bootstrap control drive |
| CN109084672A (en) * | 2018-08-15 | 2018-12-25 | 北京中航惠通自动化技术有限公司 | Magnetostrictive displacement sensor is precisely controlled formula electric pushrod built in a kind of |
| CN109084672B (en) * | 2018-08-15 | 2020-07-03 | 北京中航惠通自动化技术有限公司 | Accurate control type electric push rod with built-in magnetostrictive displacement sensor |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120307 |