CN101324642B - Method and device for collecting multi-channel electromagnetic valve current - Google Patents
Method and device for collecting multi-channel electromagnetic valve current Download PDFInfo
- Publication number
- CN101324642B CN101324642B CN2008101330728A CN200810133072A CN101324642B CN 101324642 B CN101324642 B CN 101324642B CN 2008101330728 A CN2008101330728 A CN 2008101330728A CN 200810133072 A CN200810133072 A CN 200810133072A CN 101324642 B CN101324642 B CN 101324642B
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- operational amplifier
- electromagnetic valve
- module
- sampling resistor
- resistance
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000005070 sampling Methods 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 239000000284 extract Substances 0.000 claims abstract description 3
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2829—Testing of circuits in sensor or actuator systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Magnetically Actuated Valves (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a multi-channel electromagnetic valve current acquisition device which is composed of a single-chip microcomputer A/D processing module (1), a CAN communication module (2), a computer communication module (3), an amplifying circuit module (4), a sampling resistor module (5) and an external circuit module (6), wherein, a sampling resistor selects a precise resistor and is connected in series with an electromagnetic valve circuit which needs to be measured, the both ends thereof are respectively connected with a first-grade operational amplifier, the first-grade operational amplifier extracts the micro-pressure drop at the both ends of the sampling resistor and sends to a second-grade operational amplifier after the regulation of the adjustment amplification times of the resistor, a filter resistor and a filter capacitor carries out the filtration of the amplified signals, and the results are sent to the single-chip microcomputer A/D processing module. Then, the processed signals are sent to an upper computer through the CAN communication module. The invention further discloses a method for carrying out the acquisition by adopting the acquisition device. The multi-channel electromagnetic valve current acquisition device has the advantages of high negative voltage resistance, flexible adjustment of the amplification times, high communication speed and high sampling precision.
Description
Technical field
The present invention relates to wheel box control, particularly relate to multi-channel electromagnetic valve current harvester and acquisition method.
Background technology
In automatic gear-box control, the control of solenoid valve is more and more important, and the quality of its control directly has influence on the comfortableness taken and the life-span of basic machine.So need in the calibration process of Control Software, monitor the working condition of solenoid valve in real time, adjust control variable, to obtain best control strategy.Solenoid valve is an inductive load, and PWM (width modulation) control technology is generally selected in its control for use, to the requirement of sampling than higher.General sample circuit is difficult to satisfy the high negative pressure that produces when electric current that the circuit high speed changes and solenoid valve turn-off to be impacted, and because the abominable electromagnetic environment in the car, also difficultly carries out in real time, communicates by letter reliably with host computer.When needs are sampled to the multichannel current signal simultaneously, can produce the sampling asynchronous, data distortion.
Summary of the invention
The invention discloses a kind of multi-channel electromagnetic valve current harvester.Concrete technical scheme is as follows.
A kind of multi-channel electromagnetic valve current harvester is by Chip Microcomputer A/D processing module, CAN communication module, the compunication module, the amplifying circuit module, the sampling resistor module, the external circuitry module is formed, wherein sampling resistor is a precision resistance, be connected in the electromagnetic valve circuit that needs to measure, when electric current flows through sampling resistor, can produce small pressure drop at the sampling resistor two ends, after the processing and amplifying, the result is sent into Chip Microcomputer A/D processing module in this pressure drop input amplifying circuit module.
The amplifying circuit module comprises first order operational amplifier, regulates resistance, second level operational amplifier, filter resistance and filter capacitor, the sampling resistor two ends are connected respectively in the first order operational amplifier, first order operational amplifier extracts the small pressure drop at sampling resistor two ends, and after overregulating resistance adjustment enlargement factor, send into second level operational amplifier, filter resistance and filter capacitor carry out filtering to the signal that amplified, and at last the result are sent into Chip Microcomputer A/D processing module.The signal that Chip Microcomputer A/the D processing module is handled well is sent into host computer by the CAN communication module.
Wherein first order operational amplifier is a differential amplifier, and second level operational amplifier is the configuration amplifier.
The invention also discloses and adopt above-mentioned multi-channel electromagnetic valve current device to carry out current acquisition method.
Utilize above-mentioned multi-channel electromagnetic valve current harvester, can realize the signals collecting of high-speed real-time, can adapt to fast-changing voltage and high negative, regulate current amplification factor and filtering frequency range easily, reduce the electric current that the inductance characteristic of solenoid valve brings effectively and change fluctuation, data in real time can be uploaded to host computer and carry out the synchronization monitoring analysis, be convenient to analysis data.Have anti-high negative voltage, the enlargement factor adjustment is flexible, and communication speed is fast, advantage of high sampling precision.
Description of drawings
Fig. 1: basic functional block diagram;
Fig. 2: current sample amplifying circuit;
Fig. 3: capture program process flow diagram.
Embodiment
Below in conjunction with accompanying drawing the present invention is carried out concrete description.
Multi-channel electromagnetic valve current harvester shown in Figure 1, by Chip Microcomputer A/D processing module 1, CAN communication module 2, compunication module 3, amplifying circuit module 4, sampling resistor module 5, external circuitry module 6 is formed.
Shown in Figure 2 is the current sample amplifying circuit, as the powerful precision resistance R of little resistance of sampling resistor
SENBe connected in the electromagnetic valve circuit that needs to measure R
SENTwo ends are connected respectively among the first order operational amplifier OP1, when electric current flows through R
SENThe time, can be at R
SENTwo ends produce small pressure drop, and first order differential operational amplifier OP1 sends into second level operational amplifier, resistance R after adjusting enlargement factor with the small pressure drop extraction at resistance two ends and through resistance R x
FAnd capacitor C
FThe signal that amplified is carried out filtering, at last the result is sent into Chip Microcomputer A/D processing module 1.The signal that communication module 2 is good with acquisition process is sent into host computer by CAN communication.
In solenoid control, the controlled device solenoid valve is an inductive load, so change at electric current, can produce when particularly opening and turn-offing and hinder the moment high negative pressure that electric current changes, therefore having added continuous current circuit-diode D in circuit adopts and discharges this wherein high-energy of moment, but can exert an influence even defective chip to device, also can influence the accuracy of acquired signal, therefore first order operational amplifier OP1 chooses the chip of negative pressure resistant, the circuit of the assurance first order is not subjected to the influence of negative pressure like this, and the second level can be carried out signal Processing safely accurately because the isolation of the first order has been arranged.
Claims (8)
1. a multi-channel electromagnetic valve current harvester comprises Chip Microcomputer A/D processing module (1), CAN communication module (2), compunication module (3), amplifying circuit module (4), sampling resistor module (5), external circuitry module (6) is characterized in that: sampling resistor (R
SEN) be the powerful precision resistance of little resistance, be connected in the electromagnetic valve circuit that needs to measure; The amplifying circuit module comprises first order operational amplifier (OP1), regulates resistance (Rx), second level operational amplifier (OP2), filter resistance (R
F) and filter capacitor (C
F), sampling resistor (R
SEN) two ends are connected respectively in the first order operational amplifier (OP1), when electric current flows through sampling resistor (R
SEN) time, at sampling resistor (R
SEN) the small pressure drop of two ends generation, first order operational amplifier (OP1) is with sampling resistor (R
SEN) the small pressure drop at two ends extracts, and send into second level operational amplifier (OP2), filter resistance (R through overregulating after resistance (Rx) is adjusted enlargement factor
F) and filter capacitor (C
F) signal that amplified is carried out filtering, at last the result is sent into Chip Microcomputer A/D processing module (1), first order operational amplifier (OP1) is the chip of negative pressure resistant.
2. multi-channel electromagnetic valve current harvester as claimed in claim 1 is characterized in that: the signal that Chip Microcomputer A/D processing module (1) is handled well is sent into host computer by CAN communication module (2).
3. multi-channel electromagnetic valve current harvester as claimed in claim 1 or 2 is characterized in that: first order operational amplifier (OP1) is the differential amplifier of negative pressure resistant.
4. multi-channel electromagnetic valve current harvester as claimed in claim 1 or 2 is characterized in that: second level operational amplifier (OP2) is the configuration amplifier.
5. multi-channel electromagnetic valve current harvester as claimed in claim 1 or 2 is characterized in that: this device also comprises continuous current circuit.
6. multi-channel electromagnetic valve current harvester as claimed in claim 5 is characterized in that: continuous current circuit is to be made of the diode (D) that is connected in parallel on solenoid valve and sampling resistor two ends.
7. multi-channel electromagnetic valve current acquisition method, sampling resistor (R
SEN) be the high-power precision resistance of little resistance, be connected in the electromagnetic valve circuit that needs to measure, gather the electric current of solenoid valve, when electric current flows through sampling resistor (R
SEN) time, can be at sampling resistor (R
SEN) the small pressure drop of two ends generation, the first order operational amplifier (OP1) of negative pressure resistant is delivered in the pressure drop that this is small, is sending into second level operational amplifier (OP2) again, filter resistance (R through overregulating after resistance (Rx) is adjusted enlargement factor
F) and filter capacitor (C
F) signal that amplified is carried out filtering, then the result is sent into Chip Microcomputer A/D processing module and change in (1), at last the signal of handling well is sent into host computer by CAN communication.
8. multi-channel electromagnetic valve current acquisition method as claimed in claim 7 is characterized in that: first order operational amplifier (OP1) is the differential amplifier of negative pressure resistant; Second level operational amplifier (0P2) is the configuration amplifier.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101330728A CN101324642B (en) | 2008-07-08 | 2008-07-08 | Method and device for collecting multi-channel electromagnetic valve current |
| PCT/CN2009/072651 WO2010003360A1 (en) | 2008-07-08 | 2009-07-06 | A multi-channel current sampling apparatus and method for solenoid valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101330728A CN101324642B (en) | 2008-07-08 | 2008-07-08 | Method and device for collecting multi-channel electromagnetic valve current |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101324642A CN101324642A (en) | 2008-12-17 |
| CN101324642B true CN101324642B (en) | 2011-06-08 |
Family
ID=40188263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101330728A Active CN101324642B (en) | 2008-07-08 | 2008-07-08 | Method and device for collecting multi-channel electromagnetic valve current |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101324642B (en) |
| WO (1) | WO2010003360A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230778A (en) * | 2019-05-29 | 2019-09-13 | 西安交通大学 | A kind of non-intervention type dynamic hydraulic measuring system |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324642B (en) * | 2008-07-08 | 2011-06-08 | 奇瑞汽车股份有限公司 | Method and device for collecting multi-channel electromagnetic valve current |
| CN103675427A (en) * | 2012-08-31 | 2014-03-26 | 紘康科技股份有限公司 | Inrush current measuring device |
| US9184754B2 (en) * | 2013-12-12 | 2015-11-10 | Mediatek Inc. | Analog-to-digital converting device and analog-to-digital converting method |
| CN104020346A (en) * | 2014-06-26 | 2014-09-03 | 上海电力学院 | Micro-current signal extraction system |
| CN105301330A (en) * | 2015-11-17 | 2016-02-03 | 镇江恒驰科技有限公司 | Current detection circuit of fuel oil injection solenoid valve |
| CN107806531A (en) * | 2017-11-22 | 2018-03-16 | 杭州高品自动化设备有限公司 | Electromagnetic valve driver control system and its control method |
| CN107911120B (en) * | 2017-12-14 | 2023-12-12 | 北京雨根科技有限公司 | Micro signal acquisition method and micro signal acquisition device |
| CN109164495B (en) * | 2018-11-02 | 2024-01-23 | 湖南继善高科技有限公司 | Oil gas fracturing electromagnetic data real-time acquisition device |
| CN109660258B (en) * | 2018-12-29 | 2023-02-28 | 四川双元智能科技有限公司 | Method, device and system for synchronously acquiring data with different sampling frequencies through multiple channels |
| CN113485507B (en) * | 2021-07-07 | 2022-09-06 | 深圳东昇射频技术有限公司 | High-precision anti-noise multiplication control voltage-to-current conversion method |
| CN114251503A (en) * | 2021-12-22 | 2022-03-29 | 奇瑞汽车股份有限公司 | Driving circuit of inductive load, and method and device for detecting driving current |
| CN116298492B (en) * | 2023-05-23 | 2023-08-22 | 山东棋盘信息科技有限公司 | Alternating current mixed signal detection system and method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3633113A1 (en) * | 1986-09-30 | 1988-03-31 | Bosch Gmbh Robert | METHOD AND DEVICE FOR AUTOMATICALLY DETECTING THE RESPONSE VOLTAGE OF AN ELECTROMAGNETIC COMPONENT, IN PARTICULAR A SOLENOID VALVE |
| JP3105007B2 (en) * | 1990-07-06 | 2000-10-30 | ジヤトコ・トランステクノロジー株式会社 | Failure detection device for solenoid valve |
| DE4140586C2 (en) * | 1991-12-10 | 1995-12-21 | Clark Equipment Co N D Ges D S | Method and control device for controlling the current through a magnetic coil |
| DE19915593A1 (en) * | 1999-04-07 | 2000-11-16 | Daimler Chrysler Ag | Circuit arrangement for determination of the average current through an inductive component especially for use in automotive applications, such as actuators or control valves, has a parallel connected low pass filter |
| JP4135494B2 (en) * | 2002-12-19 | 2008-08-20 | 富士ゼロックス株式会社 | Fault diagnosis system |
| CN2836031Y (en) * | 2005-10-21 | 2006-11-08 | 清华大学 | Single-chip voltage monitoring device for vehicle fuel cell |
| DE102006040737A1 (en) * | 2006-08-31 | 2008-03-06 | Robert Bosch Gmbh | Electromagnetic valve output stage shunt recognizing device for motor vehicle`s brake circuit, has test pad arranged parallel to output stage-transitor to adjust current flow via coil, and comprising voltage comparator to measure variables |
| CN101324642B (en) * | 2008-07-08 | 2011-06-08 | 奇瑞汽车股份有限公司 | Method and device for collecting multi-channel electromagnetic valve current |
-
2008
- 2008-07-08 CN CN2008101330728A patent/CN101324642B/en active Active
-
2009
- 2009-07-06 WO PCT/CN2009/072651 patent/WO2010003360A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230778A (en) * | 2019-05-29 | 2019-09-13 | 西安交通大学 | A kind of non-intervention type dynamic hydraulic measuring system |
| CN110230778B (en) * | 2019-05-29 | 2020-07-28 | 西安交通大学 | Non-intrusive dynamic hydraulic measurement system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010003360A1 (en) | 2010-01-14 |
| CN101324642A (en) | 2008-12-17 |
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Effective date of registration: 20160601 Address after: 241006 Wuhu economic and Technological Development Zone, Changchun Road, No. 8, No. Patentee after: CHERY AUTOMOBILE CO., LTD. Address before: 241009 Wuhu economic and Technological Development Zone, Anhui, No. 8 Changchun Road Patentee before: Saic Chery Automobile Co., Ltd. |
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| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Hunan Road Wuhu economic and Technological Development Zone 241000 Anhui Fengming No. 11 Patentee after: Wuhu WanLiYang transmission Co., Ltd. Address before: 241006 Wuhu economic and Technological Development Zone, Changchun Road, No. 8, No. Patentee before: CHERY AUTOMOBILE CO., LTD. |