CN103412234A - Leakage current testing system based on TMS320F2812 - Google Patents
Leakage current testing system based on TMS320F2812 Download PDFInfo
- Publication number
- CN103412234A CN103412234A CN2013103178054A CN201310317805A CN103412234A CN 103412234 A CN103412234 A CN 103412234A CN 2013103178054 A CN2013103178054 A CN 2013103178054A CN 201310317805 A CN201310317805 A CN 201310317805A CN 103412234 A CN103412234 A CN 103412234A
- Authority
- CN
- China
- Prior art keywords
- leakage current
- control system
- dsp control
- testing system
- current testing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a leakage current testing system based on a TMS320F2812. The leakage current testing system is mainly composed of a data display system, a serial port chip, a DSP control system and a leakage current collecting signal processing circuit. Collection is performed through the leakage current collecting signal processing circuit, signals are processed and transmitted to the DSP control system, and an integrated A/D and sampling hold circuit in the DSP control system is used for collecting data. The data are transmitted to the data display system for displaying through the serial port chip. The leakage current signal processing circuit of a single human body impedance network is adopted, the TMS320F2812 is adopted for data collection and performing data communication with a computer, and designing and achieving of the whole testing system are finished.
Description
Technical field
The present invention relates to technical field of measurement and test, specifically refer to a kind of based on TMS320F2812 leakage current testing system.
Background technology
Raising along with living standards of the people, household electronic products constantly appears at every family, and quantity constantly increases, these electrical equipment have facilitated the people's family life on the one hand, this has also caused making the person and property be subject to the aggravation of Harm due to electric equipment initiation fire and injury accident but then, and wherein leakage current is to cause one of major reason occurred accident and harm.Leakage current is one of important symbol of weighing the electrical apparatus insulation quality, is also the leading indicator of product safety performance.
Should try one's best and guarantee the security of product in each electric product manufacture commercial city.Simultaneously, countries in the world have also been formulated safety standard separately and have been carried out the safety of standard domestic electric appliance, and implement relevant Safety Approval and detect.In these safety certifications, IEC and U.S. UL, Canadian CSA, German VDE etc. require product is carried out to the Leakage Current test, and the CCC authentication of China has also proposed same requirement.
Summary of the invention
The object of the present invention is to provide a kind of Leakage Current signal conditioning circuit of taking single human body impedance network, adopt TMS320F2812 to carry out data acquisition and carry out data communication with computing machine, complete design and the realization of whole test macro.
The present invention is achieved through the following technical solutions: a kind of based on TMS320F2812 leakage current testing system, mainly by data presentation system, serial port chip, DSP control system, Leakage Current collection signal modulate circuit four parts, formed, by the modulate circuit collection of Leakage Current collection signal and the DSP control system is processed and be sent to signal, by the inner integrated A/D of DSP control system and sampling hold circuit, carry out data acquisition, show by serial port chip data transmission to data presentation system.
Described DSP control system adopts 32 to control class fix-point TMS320F2812.Its principal feature has external clock after frequency multiplication of phase locked loop, to reach 150MHz (clock period is 6.67ns), abundant Peripheral Interface (Asynchronous Serial Interface SCI is arranged, synchronous serial interface SPI, CAN, EV, ADC etc.), have nearly 56 reusable GPIO mouths.SCI module by DSP and data presentation system carries out data communication and built-in 12 the 16 passage ADC of TMS320F2812 carry out high-speed data acquisition, high conversion rate is 12.5 MSPS, can meet the sampling of 50 Hz～1 MHz leakage current.
Described DSP control system realizes the switching of Leakage Current test by the GPIO of TMS320F2812, comprise surperficial effects on surface, surface over the ground, the surface to three kinds of power supplys, control simultaneously and interrupt processing, utilize the inner integrated A/D of DSP and sampling hold circuit to carry out data acquisition, by serial port chip, data transmission to data presentation system is shown.
Described Leakage Current collection signal modulate circuit is is mainly connected and composed successively by human body impedance network, voltage follower, amplifying circuit, photoelectrical coupler.Equipment under test is at the electric current that adds that 220 V alternating voltages produce by isolating transformer, flow into the human body impedance network, the circuit that described human body impedance network using resistance and electric capacity form carrys out simulating human body electric shock, by the human body impedance network is connected to the instrument component to be measured that human body may get an electric shock, measure the electric current that flows through the human body impedance network.First order amplifying circuit makes current signal change voltage signal into and designs impedance matching circuit to make input signal stable, the effect of amplifying circuit makes output signal within the A/D acquisition range by adjusting gain amplifier, photoelectrical coupler is mainly in order to make between system under test (SUT) and test macro to realize electrical isolation completely, to reduce interference between the two.
The present invention compared with prior art, the beneficial effect had is: design cost is low, detect leakage current and can save the testing product cost, measuring accuracy is high simultaneously, by the human body impedance network is connected to the instrument component to be measured that human body may get an electric shock, the electric current of human body impedance network is flow through in measurement, and method of testing is safe and scientific.
The accompanying drawing explanation
Fig. 1 is leakage current testing overall system design figure.
Fig. 2 is the leakage current testing schematic diagram.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1:
As shown in Figure 1, the present invention mainly consists of data presentation system, serial port chip, DSP control system, Leakage Current collection signal modulate circuit four parts, by the modulate circuit collection of Leakage Current collection signal and the DSP control system is processed and be sent to signal, by the inner integrated A/D of DSP control system and sampling hold circuit, carry out data acquisition, show by serial port chip data transmission to data presentation system.
Embodiment 2:
The present embodiment, on the basis of embodiment 1, is usingd data presentation system and dsp chip as monitoring platform, realizes that its schematic diagram as shown in Figure 2 to the automatic test of the leakage current of taking single human body impedance network.
Described DSP control system adopts 32 to control class fix-point TMS320F2812.GPIO by TMS320F2812 can realize surperficial effects on surface, surface over the ground, surface is to the switching of power supply Leakage Current test, and control interruption and process, utilize the inner integrated A/D of DSP and sampling hold circuit to carry out data acquisition, by serial port chip, data transmission to data presentation system is shown.Its principal feature has external clock after frequency multiplication of phase locked loop, to reach 150MHz (clock period is 6.67ns), abundant Peripheral Interface (Asynchronous Serial Interface SCI is arranged, synchronous serial interface SPI, CAN, EV, ADC etc.), have nearly 56 reusable GPIO mouths.SCI module by DSP and data presentation system carries out data communication and built-in 12 the 16 passage ADC of TMS320F2812 carry out high-speed data acquisition, high conversion rate is 12.5 MSPS, can meet the sampling of 50 Hz～1 MHz leakage current.
Described Leakage Current collection signal modulate circuit is is mainly connected and composed successively by human body impedance network, voltage follower, amplifying circuit, photoelectrical coupler.Equipment under test is at the electric current that adds that 220 V alternating voltages produce by isolating transformer, flow into the human body impedance network, first order amplifying circuit makes current signal change voltage signal into and designs impedance matching circuit to make input signal stable, the effect of amplifying circuit makes output signal within the A/D acquisition range by adjusting gain amplifier, photoelectrical coupler is mainly in order to make between system under test (SUT) and test macro to realize electrical isolation completely, to reduce interference between the two.
Claims (5)
1. one kind based on TMS320F2812 leakage current testing system, it is characterized in that: mainly by data presentation system, serial port chip, DSP control system, Leakage Current collection signal modulate circuit four parts, formed, by the modulate circuit collection of Leakage Current collection signal and the DSP control system is processed and be sent to signal, by the inner integrated A/D of DSP control system and sampling hold circuit, carry out data acquisition, show by serial port chip data transmission to data presentation system.
2. according to claim 1 based on TMS320F2812 leakage current testing system, it is characterized in that: described DSP control system adopts 32 to control class fix-point TMS320F2812.
3. according to claim 2 based on TMS320F2812 leakage current testing system, it is characterized in that: described DSP control system realizes the switching of Leakage Current test by the GPIO of TMS320F2812.
4. according to claim 1 based on TMS320F2812 leakage current testing system, it is characterized in that: described Leakage Current collection signal modulate circuit is is mainly connected and composed successively by human body impedance network, voltage follower, amplifying circuit, photoelectrical coupler.
5. according to claim 1 based on TMS320F2812 leakage current testing system, it is characterized in that: described data presentation system is connected by serial port chip with the DSP control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103178054A CN103412234A (en) | 2013-07-26 | 2013-07-26 | Leakage current testing system based on TMS320F2812 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103178054A CN103412234A (en) | 2013-07-26 | 2013-07-26 | Leakage current testing system based on TMS320F2812 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103412234A true CN103412234A (en) | 2013-11-27 |
Family
ID=49605260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103178054A Pending CN103412234A (en) | 2013-07-26 | 2013-07-26 | Leakage current testing system based on TMS320F2812 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103412234A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198907A (en) * | 2014-09-10 | 2014-12-10 | 广东美的集团芜湖制冷设备有限公司 | Power device current leakage detecting device and intelligent power module detecting equipment |
| CN105571739A (en) * | 2016-01-28 | 2016-05-11 | 山东鲁能智能技术有限公司 | Detecting system and detecting method for charging gun head temperature of electric vehicle |
| CN106546849A (en) * | 2015-09-16 | 2017-03-29 | 弗兰克公司 | For the electrical isolation of camera in test and survey tool |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009068883A (en) * | 2007-09-11 | 2009-04-02 | Kaise Corp | Clamp tester |
| JP2009085925A (en) * | 2007-10-03 | 2009-04-23 | Seiko Epson Corp | Leak defect detecting method |
| CN102221641A (en) * | 2011-04-07 | 2011-10-19 | 北京交通大学 | On-line monitoring system for leakage current of high-voltage power transmission line insulator |
| CN203365605U (en) * | 2013-07-26 | 2013-12-25 | 国家电网公司 | Leakage current test system based on TMS320F2812 |
-
2013
- 2013-07-26 CN CN2013103178054A patent/CN103412234A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009068883A (en) * | 2007-09-11 | 2009-04-02 | Kaise Corp | Clamp tester |
| JP2009085925A (en) * | 2007-10-03 | 2009-04-23 | Seiko Epson Corp | Leak defect detecting method |
| CN102221641A (en) * | 2011-04-07 | 2011-10-19 | 北京交通大学 | On-line monitoring system for leakage current of high-voltage power transmission line insulator |
| CN203365605U (en) * | 2013-07-26 | 2013-12-25 | 国家电网公司 | Leakage current test system based on TMS320F2812 |
Non-Patent Citations (2)
| Title |
|---|
| 刘建利等: "基于TMS320F2812泄漏电流测试系统的设计", 《现代电子技术》, vol. 35, no. 1, 1 January 2012 (2012-01-01), pages 160 - 164 * |
| 杨秋玲等: "符合新标准的医疗设备泄漏电流测试技术研究", 《电子测量技术》, vol. 32, no. 01, 31 January 2009 (2009-01-31) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198907A (en) * | 2014-09-10 | 2014-12-10 | 广东美的集团芜湖制冷设备有限公司 | Power device current leakage detecting device and intelligent power module detecting equipment |
| CN106546849A (en) * | 2015-09-16 | 2017-03-29 | 弗兰克公司 | For the electrical isolation of camera in test and survey tool |
| CN105571739A (en) * | 2016-01-28 | 2016-05-11 | 山东鲁能智能技术有限公司 | Detecting system and detecting method for charging gun head temperature of electric vehicle |
| CN105571739B (en) * | 2016-01-28 | 2018-11-13 | 山东鲁能智能技术有限公司 | A kind of electric vehicle charging pipette tips system for detecting temperature and detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101576595B (en) | Online monitoring and electricity testing method of switch cabinet lightning arrester and device for realizing same | |
| CN104569902B (en) | Digital type electric energy meter power consumption measuring device and method | |
| CN201583603U (en) | Switch cabinet electricity testing lightning arrester on-line monitoring device | |
| CN104459493A (en) | Switch cabinet partial discharge on-line monitoring system | |
| CN103063895B (en) | Pliers-shaped anti-interference current transformer and transformer iron core grounding current testing system | |
| CN205193212U (en) | Insulating detecting system of DC cable | |
| CN104090219A (en) | Partial discharge high-frequency monitor of high-voltage cable terminals | |
| CN206584008U (en) | Transformer hidden danger is discharged and winding deformation monitoring device | |
| CN203658453U (en) | Wireless secondary voltage-drop and load tester provided with wireless synchronous communication function | |
| CN106324353A (en) | Inductive filtering converter transformer harmonic wave impedance measurement method and device | |
| CN104407209A (en) | Energy efficiency metering detection method of distribution transformer | |
| CN204287307U (en) | Transformer, current detection circuit based on transformer | |
| CN103412234A (en) | Leakage current testing system based on TMS320F2812 | |
| CN108535575A (en) | Power quality analysis device based on short-distance wireless communication technology | |
| CN203365605U (en) | Leakage current test system based on TMS320F2812 | |
| CN202230155U (en) | Three-phase digital intelligent electric energy quality detection device | |
| CN204462246U (en) | A kind of HVDC (High Voltage Direct Current) transmission line corona loss measuring system | |
| CN204116451U (en) | A kind of Energy Efficiency of Distribution Transformer measuring and testing device | |
| CN202837375U (en) | Electric current loop for voltage and current measuring signal transmission | |
| CN208672718U (en) | Power quality analysis device based on short-distance wireless communication technology | |
| CN204086402U (en) | High-frequency isolation impedance detection device | |
| CN104034977A (en) | Capacitive voltage transformer electrified detector | |
| CN201319049Y (en) | High-tension current mutual-inductor transformation ratio tester | |
| CN203178417U (en) | High voltage cable charged inspection system | |
| CN203275517U (en) | Multifunctional three-phase harmonic wave electric energy meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131127 |