CN102928711A - Broadband synchronous online measurement system for conductive electromagnetic disturbance of engineering machinery - Google Patents
Broadband synchronous online measurement system for conductive electromagnetic disturbance of engineering machinery Download PDFInfo
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- CN102928711A CN102928711A CN2012104305936A CN201210430593A CN102928711A CN 102928711 A CN102928711 A CN 102928711A CN 2012104305936 A CN2012104305936 A CN 2012104305936A CN 201210430593 A CN201210430593 A CN 201210430593A CN 102928711 A CN102928711 A CN 102928711A
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Abstract
The invention relates to a broadband synchronous online measurement system for conductive electromagnetic disturbance of engineering machinery and belongs to the technical field of electromagnetic compatibility testing of engineering machinery. The broadband synchronous online measurement system comprises a plurality of far-end units, a local unit and a terminal computer, wherein the far-end units are used for acquiring a conductive electromagnetic disturbance waveform and a corresponding electromagnetic environment, performing photoelectric conversion on the waveform to obtain an optical signal and transmitting the optical signal to a back-end unit through an optical fiber; the local unit is used for receiving the optical signal of the far-end units, converting the optical signal into a digital signal and transmitting the digital signal to the terminal computer; and the terminal computer is used for receiving the digital signal of the local unit, displaying the conductive electromagnetic disturbance waveform of the engineering machinery, storing the waveform and completing data storage and analysis. According to the measurement system, the conductive electromagnetic disturbance waveform and the corresponding electromagnetic environment of the engineering machinery can be synchronously measured in the severe electromagnetic environment, an electromagnetic disturbance source cannot be formed to the engineering machinery, and a reliable tool is provided for deeply analyzing the conductive electromagnetic disturbance characteristics of the engineering machinery.
Description
Technical field
The present invention relates to a kind of synchronous on-line measurement system of wideband of engineering machinery conduction electromagnetic disturbance, belong to engineering machinery electromagnetism compatibility test technical field.
Background technology
Engineering machinery is as a kind of preparation of construction, and its workplace electromagnetic environment is abominable, requires very high for its EMC Design.And the domestic project Machine Design is main target mainly with being lowered into this greatly, and design of electrical system is very lack of standardization, and Electro Magnetic Compatibility does not reach corresponding requirements, causes Frequent Troubles.Little not normal to the electric component serviceability, component wear, malfunctioning to control system greatly, cause the complete machine misoperation or produce major accident.Electromagnetic disturbance source characteristic is the key subject of electromagnetic compatibility research.It is generally acknowledged the radiation disturbance of engineering machinery mostly from conduction interference, so the research of conduction harassing and wrecking has prior meaning than the research of radiation, and on-line measurement is the important means of obtaining the crucial electric parameter in conduction harassing and wrecking source.
Aspect data acquisition equipment, it is a lot of to conduct a research both at home and abroad, and has the autonomous device of a large amount of maturations and integrated circuit board can realize wideband data acquisition transmission.These equipment are applicable to the conduction electromagnetic disturbance test of the less normal domestic vehicle of size, but compare with the measurement of correlation of general motor vehicles for civilian use, and engineering machinery conduction electromagnetic disturbance is measured and had technically several distinct issues.At first, the engineering machinery size is large, and the cloth line length is distant between each harassing and wrecking source, adopts traditional test equipment and means of testing to need very long signal extension line.The outside harassing and wrecking that extension line may be coupled serious, deamplification radio-frequency component, accuracy and the degree of accuracy of impact test.Extension line is longer, and this impact is more obvious.Secondly, extension line is very long, also can cause signal by the problem of test point to the propagation delay length of receiver, causes comparatively difficulty of synchronism detection, and means of testing commonly used can't satisfy the requirement of synchronism detection.The 3rd is that the engineering machinery workplace is more special, need to carry out operation in the zone that correlation standard electromagnetic disturbance limit value is not yet arranged, its external electromagnetic environment very severe is had relatively high expectations to the immunity to interference of test macro own, and some testing apparatuss commonly used possibly can't work.At last, the conduction electromagnetic disturbance signal of engineering machinery mostly is broadband signal, and is higher to the requirement of sensor frequency band compared to traditional test, needs voltage, electric current, electric field, magnetic field sensor bandwidth to reach respectively 500MHz, 100MHz, 500MHz, 300MHz.Therefore, development a kind of specially for engineering machinery, high precision and the stronger conduction electromagnetic disturbance wideband synchronized measurement system of immunity to interference have very outstanding construction value.
Summary of the invention
The objective of the invention is to propose a kind of synchronous on-line measurement system of wideband of engineering machinery conduction electromagnetic disturbance, to realize the multiple spot remote synchronous on-line measurement to engineering machinery conduction electromagnetic disturbance, and in the wider frequency territory, reflect engineering machinery conduction electromagnetic disturbance characteristic, simultaneously the electromagnetic environment of engineering machinery workplace is carried out on-line monitoring; System's each several part adopts optical fiber to communicate, and adopts the internal battery power supply, can work in abominable electromagnetic environment to guarantee it, and itself can not consist of the electromagnetic disturbance source to engineering machinery.
The synchronous on-line measurement system of wideband of the High Voltage Transmission Line Engineering mechanical conductive electromagnetic disturbance that the present invention proposes comprises;
A plurality of far-end units are distributed in each crucial electromagnetic disturbance source and sensitive equipment place, are used for gathering conduction electromagnetic disturbance waveform and corresponding electromagnetic environment, and it is carried out obtaining light signal after the electric light conversion, and light signal is transmitted through the fiber to backend unit;
Local unit, the light signal for receiving far-end unit converts this light signal to digital signal, and is sent to terminal computer;
Terminal computer for the digital signal that receives local unit, shows the waveform of engineering machinery conduction electromagnetic disturbance, and storage, finishes data storing and analysis.
Far-end unit in the above-mentioned wideband online measuring system comprises:
Sensor assembly, the external electrical field intensity and the magnetic field intensity that are used for voltage, electric current and this test point of reception engineering machinery conduction electromagnetic disturbance, and converting thereof into the voltage signal of specified input range, employed sensor assembly comprises voltage sensor, current sensor, photo-electric electric-field sensor, magnetic field sensor;
Acquisition module is used for the voltage signal of above-mentioned specified input range is carried out the A/D conversion, obtains digital signal, and described acquisition module links to each other with sensor assembly;
The time service module is used for acquisition module is carried out time service synchronously, realizes the function of each acquisition module synchronous acquisition, and described synchronous time service module links to each other with acquisition module;
Electrooptic conversion module is used for above-said current signal is carried out the electric light conversion, obtains light signal, and described electrooptic conversion module links to each other with acquisition module;
Supply module is used to sensor assembly, acquisition module, synchronous time service module and electrooptic conversion module that working power is provided, and described supply module links to each other with sensor assembly, acquisition module, synchronous time service module and electrooptic conversion module respectively.
Local unit in the above-mentioned wideband online measuring system comprises:
Photoelectric conversion module is used for receiving the light signal from far-end unit, and converts thereof into digital signal;
Interface modular converter, the above-mentioned digital signal that is used for receiving carries out being sent to terminal computer after the protocol conversion, and described interface modular converter links to each other with photoelectric conversion module.
The synchronous on-line measurement system of wideband of the engineering machinery conduction electromagnetic disturbance that the present invention proposes, its advantage is: can measure at the multiple spot remote synchronous of realizing the conduction electromagnetic disturbance such as large-scale engineering machineries such as QAY220 truck-mounted cranes, and can reflect comparatively exactly the characteristic of conduction electromagnetic disturbance in the wider frequency territory.Simultaneously the electromagnetic environment of engineering machinery workplace is carried out on-line monitoring.System's each several part adopts optical fiber to communicate, and adopts the internal battery power supply, can work in abominable electromagnetic environment to guarantee it, and itself can not consist of the electromagnetic disturbance source to engineering machinery.On-line measurement system of the present invention provides reliable instrument for analysing in depth engineering machinery conduction electromagnetic disturbance characteristic, for the immunity to interference of formulating crucial sensitive equipment requires to provide important evidence, for the electromagnetic compatibility problem that solves engineering machinery provides feasible means.
Description of drawings
Fig. 1 is the structured flowchart of measuring system of the present invention.
Embodiment
The synchronous on-line measurement system of wideband of the engineering machinery conduction electromagnetic disturbance that the present invention proposes, its structured flowchart comprises as shown in Figure 1;
A plurality of far-end units are distributed in each crucial electromagnetic disturbance source and sensitive equipment place, are used for gathering conduction electromagnetic disturbance waveform and corresponding electromagnetic environment, and it is carried out obtaining light signal after the electric light conversion, and light signal is transmitted through the fiber to backend unit;
Local unit, the light signal for receiving far-end unit converts this light signal to digital signal, and is sent to terminal computer;
Terminal computer for the digital signal that receives local unit, shows the waveform of engineering machinery conduction electromagnetic disturbance, and storage, finishes data storing and analysis.
Far-end unit in the above-mentioned wideband online measuring system comprises:
Sensor assembly, the external electrical field intensity and the magnetic field intensity that are used for voltage, electric current and this test point of reception engineering machinery conduction electromagnetic disturbance, and converting thereof into the voltage signal of specified input range, employed sensor assembly comprises voltage sensor, current sensor, photo-electric electric-field sensor, magnetic field sensor;
Acquisition module is used for the voltage signal of above-mentioned specified input range is carried out the A/D conversion, obtains digital signal, and described acquisition module links to each other with sensor assembly;
The time service module is used for acquisition module is carried out time service synchronously, realizes the function of each acquisition module synchronous acquisition, and described synchronous time service module links to each other with acquisition module;
Electrooptic conversion module is used for above-said current signal is carried out the electric light conversion, obtains light signal, and described electrooptic conversion module links to each other with acquisition module;
Supply module is used to sensor assembly, acquisition module, synchronous time service module and electrooptic conversion module that working power is provided, and described supply module links to each other with sensor assembly, acquisition module, synchronous time service module and electrooptic conversion module respectively.
Local unit in the above-mentioned wideband online measuring system comprises:
Photoelectric conversion module is used for receiving the light signal from far-end unit, and converts thereof into digital signal;
Interface modular converter, the above-mentioned digital signal that is used for receiving carries out being sent to terminal computer after the protocol conversion, and described interface modular converter links to each other with photoelectric conversion module.
In the example of the synchronous on-line measurement system of wideband of engineering machinery conduction electromagnetic disturbance of the present invention, its far-end unit is installed on the engineering machinery near each crucial electromagnetic disturbance source and sensitive equipment, be used for voltage, current waveform and electric field intensity, the magnetic induction density collection of conduction electromagnetic disturbance, and data are transferred to local unit with light signal.Sensor assembly is selected voltage sensor, current sensor and photo-electric electric-field sensor, the magnetic field sensor of high precision, high bandwidth, and the connecting line length between sensor and the acquisition module is no more than 30cm.701939 type voltage sensors, 701932 type current sensors that voltage sensor, current sensor adopt respectively Japanese Yokogawa company to produce.Electric-field sensor adopts the CWY2 type photo-electric electric-field sensor by Tsing-Hua University's development.Magnetic field sensor adopts the H200 type magnetic field sensor by the HOLADAY company production of the U.S..When receiving acquisition instructions, the temporal information that acquisition module provides according to synchronously time service is carried out synchronous acquisition to the analog voltage signal by the sensor assembly input, and is converted to digital signal, be converted to light signal through electrooptic conversion module again, transmit to local unit by optical fiber.Acquisition module adopts the DP07054 oscillograph of being produced by Imtech.The time service unit adopts the GPS module synchronously, and synchronous error is no more than 1ms.The General lead acid accumulator that adopts 12V, 20Ah is acquisition module, synchronously time service module and the electrooptic conversion module power supply in the far-end unit.Local unit is used for the control to far-end unit, and receives the data of far-end unit transmission, and realization is connected with terminal computer.Local unit by with far-end unit in identical photoelectric conversion module receive signal, be connected with the USB interface of terminal computer by the RJ45 interface of general interface convertor with photoelectric conversion module, terminal computer shows that at the interface current waveform stores simultaneously.Terminal computer is realized the mutual of system and user, finishes data storing and analysis.Terminal computer of the present invention can adopt general PC, requires more than the CPU frequency 1.8GHz, more than the internal memory 1G, WindowsXP operating system is installed.
The synchronous on-line measurement system of wideband of the engineering machinery conduction electromagnetic disturbance that the present invention proposes can realize that the multiple spot remote synchronous of conduction electromagnetic disturbance waveform is measured.Test frequency range is contained all electromagnetic disturbance signal bands, and each test point distance can reach 50m, can satisfy the large-scale engineering machinery requirement, is specially adapted to such as large-scale engineering machineries such as QAY220 truck-mounted cranes.In test harassing and wrecking waveform, the electromagnetic environment of engineering machinery workplace has been carried out on-line monitoring, for some provide the checking means by the harassing and wrecking source waveform that the coupling external electromagnetic field produces, guaranteed the accuracy of harassing and wrecking source waveforms.System's each several part adopts optical fiber to communicate, and adopts the internal battery power supply, can finish low bit rate communication in abominable electromagnetic environment, and the stable direct current supply of assurance device, has very strong interference free performance.And itself does not externally deposit electrical cable, can not consist of the electromagnetic disturbance source to engineering machinery.
Claims (3)
1. the synchronous on-line measurement system of wideband of an engineering machinery conduction electromagnetic disturbance is characterized in that this measuring system comprises;
A plurality of far-end units are distributed in each crucial electromagnetic disturbance source and sensitive equipment place, are used for gathering conduction electromagnetic disturbance waveform and corresponding electromagnetic environment, and it is carried out obtaining light signal after the electric light conversion, and light signal is transmitted through the fiber to backend unit;
Local unit, the light signal for receiving far-end unit converts this light signal to digital signal, and is sent to terminal computer;
Terminal computer for the digital signal that receives local unit, shows the waveform of engineering machinery conduction electromagnetic disturbance, and storage, finishes data storing and analysis.
2. wideband online measuring system as claimed in claim 1 is characterized in that wherein said far-end unit comprises:
Sensor assembly, the external electrical field intensity and the magnetic field intensity that are used for voltage, electric current and this test point of reception engineering machinery conduction electromagnetic disturbance, and converting thereof into the voltage signal of specified input range, employed sensor assembly comprises voltage, current probe, photo-electric electric-field sensor, Hall magnetic field sensor;
Acquisition module is used for the voltage signal of above-mentioned specified input range is carried out the A/D conversion, obtains digital signal, and described acquisition module links to each other with sensor assembly;
The time service module is used for acquisition module is carried out time service synchronously, realizes the function of each acquisition module synchronous acquisition, and described synchronous time service module links to each other with acquisition module;
Electrooptic conversion module is used for above-said current signal is carried out the electric light conversion, obtains light signal, and described electrooptic conversion module links to each other with acquisition module;
Supply module is used to sensor assembly, acquisition module, synchronous time service module and electrooptic conversion module that working power is provided, and described supply module links to each other with sensor assembly, acquisition module, synchronous time service module and electrooptic conversion module respectively.
3. wideband online measuring system as claimed in claim 1 is characterized in that wherein said local unit comprises:
Photoelectric conversion module is used for receiving the light signal from far-end unit, and converts thereof into digital signal; Interface modular converter, the above-mentioned digital signal that is used for receiving carries out being sent to terminal computer after the protocol conversion, and described interface modular converter links to each other with photoelectric conversion module.
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| CN103197156A (en) * | 2013-03-20 | 2013-07-10 | 中国舰船研究设计中心 | Synchronous acquisition system and method for multi-channel electromagnetic field intensity |
| CN104361742A (en) * | 2014-12-03 | 2015-02-18 | 中国科学院宁波材料技术与工程研究所 | Device for enhancing anti-interference capability of transmission signal of motor sensor and device for enhancing anti-interference capability of transmission signal of motor sensor |
| CN106226722A (en) * | 2016-07-08 | 2016-12-14 | 中国能源建设集团湖南省电力设计院有限公司 | A kind of all-fiber current transformator analytical equipment |
| CN107390061A (en) * | 2017-07-28 | 2017-11-24 | 南京理工大学 | Using the test system of fiber optic communication electronic device false triggering under strong electromagnetic radiation |
| CN109443628A (en) * | 2018-12-20 | 2019-03-08 | 中国工程物理研究院应用电子学研究所 | A kind of high-power microwave source strong electromagnetic ambient pressure measuring device |
| CN111966042A (en) * | 2020-08-27 | 2020-11-20 | 国家机床质量监督检验中心 | Quantitative test system and method for immunity of numerical control system |
| CN113219286A (en) * | 2021-05-19 | 2021-08-06 | 国网电力科学研究院有限公司 | Multi-stage electromagnetic disturbance measurement system, method, equipment and storage medium of electric intelligent equipment |
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Application publication date: 20130213 |