CN107505525A - A kind of reliability on-line monitoring system - Google Patents
A kind of reliability on-line monitoring system Download PDFInfo
- Publication number
- CN107505525A CN107505525A CN201710817304.0A CN201710817304A CN107505525A CN 107505525 A CN107505525 A CN 107505525A CN 201710817304 A CN201710817304 A CN 201710817304A CN 107505525 A CN107505525 A CN 107505525A
- Authority
- CN
- China
- Prior art keywords
- voltage
- measured
- performance characteristics
- current
- electrical performance
- 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.)
- Granted
Links
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a kind of reliability on-line monitoring system, including the electrical performance characteristics curve of on-line measurement electronic component and electronic component surface are by the real-time monitoring device of extent of corrosion.The device of the electrical performance characteristics curve of on-line measurement electronic component disclosed by the invention can ensure electronic component in the case of normal work, the electrical property of electronic component is measured and is converted into electrical performance characteristics curve, shown by electronic curtain, by the electrical performance characteristics curve record recorded in real time into memory；When abnormal data occurs, system can be photographed to record minisize pick-up head, and electronic component surface aging corrosion condition is transferred on display screen, to reach the purpose to electronics member device surface aging and corrosion condition on-line monitoring.The on-line monitoring system can be widely applied to Marine Electronics field, have great strategic significance to the development for promoting Marine Electronics reliability.
Description
Technical field
The invention belongs to Marine Electronics reliability field, more specifically to a kind of reliability on-line monitoring system and its
Method.
Background technology
In the past for electronic equipment, in order to measure the electrical performance characteristics of its electronic component, it is necessary to by device powers down, then
Measure, will also be disassembled sometimes in electronic component slave unit, so both influenceed the normal work of equipment, assembled and disassembled
During can also produce damage to electronic component, require that higher equipment is tested, it is necessary to equipment for encapsulation in addition
Broken a seal and sealed, cause testing cost higher.As what electronic technology was studied deepens continuously, people constantly look for new
Research method, it is thus proposed that the electric current in turn-off circuit, then tested, although this method does not have to assembly and disassembly electronic component,
Work to electronic equipment still generates certain influence, especially high sealing equipment.In addition, although there is many schemes
The measurement to the unit for electrical property parameters of electronic component can be realized, but the equipment required for testing is excessively huge and complicated, no
It is less useful for monitoring in real time beneficial to narrow space, and is had a great influence by outside environmental elements, the defects of functional reliability difference.
The content of the invention
The problem of existing for prior art, it is an object of the invention to provide a kind of reliability on-line monitoring system and its
Method, include the device of the electrical performance characteristics curve of on-line measurement electronic component, and electronic component surface by extent of corrosion
Real-time monitoring device.
Technical scheme is as follows, and it is electrical that a kind of reliability on-line monitoring system includes on-line measurement electronic component
The characteristic device of energy and electronic component surface are by the real-time monitoring device of extent of corrosion, the on-line measurement electronics member device
The device of part electrical performance characteristics curve includes part of data acquisition, data processing section, data storage section and display screen；Data
Process part receives the data of part of data acquisition, is translated into electrical performance characteristics curve, electrical performance characteristics curve is by showing
Screen is shown, and is stored in data storage section；The electronic component surface is by the real-time monitoring device of extent of corrosion, bag
Include camera, video storage part and the display screen；The data of camera shooting are shown by display screen, and by video
Storage part is stored；
Described part of data acquisition includes two power test exclusive clamps, electrical performance characteristics harvester, conditioning device
And A/D converter；Power test exclusive clamps, electrical performance characteristics harvester, conditioning device and A/D converter sequentially phase
Even.
Preferably, described electrical performance characteristics harvester includes voltage measuring apparatus, current measuring device, test electricity
Source；Current measuring device is connected with test power sources in series, and electronics to be measured is connected respectively by power test exclusive clamps after series connection
Component both ends, voltage measuring apparatus is in parallel with electronic component to be measured by power test exclusive clamps, and described voltage is surveyed
Amount device, the conditioned device of the measurement data of current measuring device and A/D are transferred to data processing section after turning device.
Preferably, described test power supply includes DC test power supply and alternating-current measurement power supply, described voltage measurement dress
Frequency-selecting voltage measuring apparatus is set to, described current measuring device is frequency-selecting current measuring device.
Preferably, described conditioning device is modulate circuit, and described modulate circuit is by the analog voltage measured and electric current
After sieve subtracts conditioning, A/D converter progress A/D conversions are sent to through isolating interference, the chip that described A/D converter uses is
ADS1299LQFP64 analog/digital conversion chips.
Preferably, for described data processing section using single-chip microcomputer, singlechip chip is TL866CS, and single-chip microcomputer will
After the digital quantity processing received, electrical performance characteristics curve is converted into.
Preferably, described data storage section uses ROM read-only storages, by electrical performance characteristics curve after digital processing
Store.
Preferably, described camera is installed on the surface of electronic component to be measured, when the electrical performance characteristics curve is different
When regular data occurs, system can control camera, by the surface aging corrosion condition of electronic component to be measured, with the shape of video
Formula stores and real-time pictures is sent on display.
Preferably, described camera is fixedly mounted in described part of data acquisition, and described camera is just
To described electronic component to be measured.
The invention discloses a kind of electrical performance characteristics method of testing of the reliability on-line monitoring system, including following step
Suddenly：
(i) when measured electric current is direct current, the voltage at selected element both ends is measured with voltage measuring apparatus, obtains an electricity
Pressure value V1；Then, at selected element both ends and connect a DC test power supply and make to be made up of the DC test power supply and selected element
Loop in produce a test electric current I1, and the voltage at selected element both ends is measured simultaneously, obtain a magnitude of voltage V2；Finally, pass through
Formula：I=I1×V2/(V2-V1) working direct current in circuit-under-test is calculated；
(ii) when measured electric current is exchanges, first, the electricity at selected element both ends is measured with frequency-selecting voltage measuring apparatus
Press V；Then, it is connected in parallel on the alternating-current measurement power supply for sending sine wave with the frequency-selecting current measuring device being connected on test power supply
The both ends of selected element, measure test electric current It, the voltage V at element both ends selected by frequency-selecting voltage measuring apparatus measurest, calculate
Go out impedance value Z=Vt/It；Finally, the operating current I, Z, V therein in selected element are calculated by formula I=V/Zt、It、
V, I is vector；
(iii) when measured electric current had not only included alternating component but also had flip-flop, first, believed with output square-wave pulse
Number test power supply, after series current measurement apparatus, be connected in parallel on the both ends of selected element, while in selected element both ends electricity in parallel
Pressure measuring device, the voltage V of output square wave high level is measured respectivelyth, electric current IthWith voltage V during output square wave low levelt1、
It1, pass through formula I1=(Ith·Vt1-Vth·It1)/(Vth-Vt1) calculate working direct current I in selected element1；
Then, the voltage V at selected element both ends is measured with frequency-selecting voltage measuring apparatus, with the alternating-current measurement for sending sine wave
Power supply and the frequency-selecting current measuring device being connected on test power supply are connected in parallel on the both ends of selected element, measure test electric current It,
The voltage V at selected element both ends is measured with frequency-selecting voltage measuring apparatus simultaneouslyt, calculate impedance value Z=Vt/It, pass through formula I2
=V/Z calculates the operating current I in selected element2；
Finally, formula I=I is passed through1+I2The operating current I in selected element is calculated, wherein, Z, Vt、It、V、I2、I
It is vector.
The possessed compared with prior art beneficial effect of the present invention is：
(1) it compensate for the blank that existing ebctronic reliability equipment monitors to reliability of electronic equipment；
(2) principle of device is simple, and manufacturing cost is low；
(3) contrasted with like product, function is more complete, and data and image are combined；
(4) data of storage provide foundation for Marine Electronics reliability consideration；
(5) space that harvester takes is small, and flexible probe can be bent, convenient to be used under narrow environment.
Brief description of the drawings
Fig. 1 is the structural representation of reliability on-line monitoring system of the present invention；
Fig. 2 is on-line monitoring system flow chart；
Fig. 3 is electric performance testing device schematic diagram；
Fig. 4 is electrical performance characteristics harvester top view.
Embodiment
Invention is further illustrated with reference to the accompanying drawings and examples.
Refering to Fig. 1, operation principle of the invention is under electronic component normal running conditions to be measured, tests its electrical property
Characteristic.
Reliability on-line monitoring system includes the device of the electrical performance characteristics curve of on-line measurement electronic component, and electronics
Real-time monitoring device of the component surface by extent of corrosion.The device bag of the electrical performance characteristics curve of on-line measurement electronic component
Include part of data acquisition, data processing section, data storage section and display portion；The invention also discloses on electronics member device
The real-time monitoring device of part surface aging and extent of corrosion, including camera, video storage part and display screen；
Refering to Fig. 2, part of data acquisition includes two power test exclusive clamps, wire, electrical performance characteristics harvester, tune
Reason device and A/D converter, the suitable measurement low current of power test exclusive clamps use, the small-sized test exclusive clamps of voltage,
This small-sized test exclusive clamps have the features such as light and handy, practicality is high, can be used in very narrow space.Electrical performance characteristics
Harvester, it is characterised in that the device is made up of voltage measuring apparatus, current measuring device, test power supply；The device is nursed one's health
After the analog voltage measured and electric current sieve are subtracted conditioning by circuit, A/D converter progress A/D conversions are sent to through isolating interference, it is described
The chip that uses of A/D converter be ADC0809 analog/digital conversion chips, the electrical performance characteristics of on-line measurement electronic component are bent
The data processing section of the device of line, the device are MSC80D51 using singlechip chip, the number that single-chip microcomputer will receive
After the processing of word amount, electrical performance characteristics curve is converted into；
Refering to Fig. 3, the method for testing of electrical performance characteristics harvester is specially：
(i) when measured electric current is direct current, the voltage at selected element both ends is measured with voltage measuring apparatus, obtains an electricity
Pressure value V1；Then, at selected element both ends and connect a DC test power supply and make to be made up of the DC test power supply and selected element
Loop in produce a test electric current I1, and the voltage at selected element both ends is measured simultaneously, obtain a magnitude of voltage V2；Finally, pass through
Formula：I=I1×V2/(V2-V1) working direct current in circuit-under-test is calculated；
(ii) when measured electric current is exchanges, first, the electricity at selected element both ends is measured with frequency-selecting voltage measuring apparatus
Press V；Then, it is connected in parallel on the alternating-current measurement power supply for sending sine wave with the frequency-selecting current measuring device being connected on test power supply
The both ends of selected element, measure test electric current It, the voltage V at element both ends selected by frequency-selecting voltage measuring apparatus measurest, calculate
Go out impedance value Z=Vt/It；Finally, the operating current I, Z, V therein in selected element are calculated by formula I=V/Zt、It、
V, I is vector；
(iii) when measured electric current had not only included alternating component but also had flip-flop, first, believed with output square-wave pulse
Number test power supply, after series current measurement apparatus, be connected in parallel on the both ends of selected element, while in selected element both ends electricity in parallel
Pressure measuring device, the voltage V of output square wave high level is measured respectivelyth, electric current IthWith voltage V during output square wave low levelt1、
It1, pass through formula I1=(Ith·Vt1-Vth·It1)/(Vth-Vt1) calculate working direct current I in selected element1。
Then, the voltage V at selected element both ends is measured with frequency-selecting voltage measuring apparatus, with the alternating-current measurement for sending sine wave
Power supply and the frequency-selecting current measuring device being connected on test power supply are connected in parallel on the both ends of selected element, measure test electric current It,
The voltage V at selected element both ends is measured with frequency-selecting voltage measuring apparatus simultaneouslyt, calculate impedance value Z=Vt/It, pass through formula I
=V/Z calculates the operating current I in selected element2。
Finally, formula I=I is passed through1+I2The operating current I in selected element is calculated, wherein, Z, Vt、It、V、I2、I
It is vector.
Refering to Fig. 4, in one particular embodiment of the present invention, described camera is fixedly mounted on described data and adopted
Collect on part, and the electronic component to be measured described in described camera face.The electrical property harvester of the embodiment by
Positive negative terminal (being used to connect electric performance test exclusive clamps) and minisize pick-up head composition, overall volume is small, can be more narrow
Narrow complex space uses.Described camera is installed on the surface of electronic component to be measured, when the electrical performance characteristics curve
When abnormal data occurs, system can control camera, by the surface aging corrosion condition of electronic component to be measured, with video
Form stores and real-time pictures is sent on display.
Claims (9)
1. a kind of reliability on-line monitoring system, it is characterised in that including on-line measurement electronic component electrical performance characteristics curve
Device and electronic component surface are by the real-time monitoring device of extent of corrosion, the on-line measurement electronic component electrical performance characteristics
The device of curve includes part of data acquisition, data processing section, data storage section and display screen；Data processing section receives
The data of part of data acquisition, electrical performance characteristics curve being translated into, electrical performance characteristics curve is shown by display screen, and
Stored in data storage section；The electronic component surface is by the real-time monitoring device of extent of corrosion, including camera, video
Storage part and the display screen；The data of camera shooting are shown by display screen, and are stored part by video and carried out
Storage；
Described part of data acquisition include two power test exclusive clamps, electrical performance characteristics harvester, conditioning device and
A/D converter；Power test exclusive clamps, electrical performance characteristics harvester, conditioning device and A/D converter are sequentially connected.
2. reliability on-line monitoring system as claimed in claim 1, it is characterised in that described electrical performance characteristics harvester
Including voltage measuring apparatus, current measuring device, test power supply；Current measuring device connects with test power sources in series, after series connection
Electronic component both ends to be measured are connected respectively by power test exclusive clamps, and voltage measuring apparatus passes through power test exclusive clamps
It is in parallel with electronic component to be measured, described voltage measuring apparatus, the conditioned device of the measurement data of current measuring device with
And A/D turn device after be transferred to data processing section.
3. reliability on-line monitoring system as claimed in claim 2, it is characterised in that described test power supply is surveyed including direct current
Try power supply and alternating-current measurement power supply, described voltage measuring apparatus is frequency-selecting voltage measuring apparatus, described current measuring device
For frequency-selecting current measuring device.
4. reliability on-line monitoring system as claimed in claim 1, it is characterised in that described conditioning device is modulate circuit,
After the analog voltage measured and electric current sieve are subtracted conditioning by described modulate circuit, A/D converter progress A/D is sent to through isolating interference
Conversion, the chip that described A/D converter uses is ADS1299LQFP64 analog/digital conversion chips.
5. reliability on-line monitoring system as claimed in claim 1, it is characterised in that what described data processing section used
It is single-chip microcomputer, singlechip chip is TL866CS, and single-chip microcomputer is converted into electrical performance characteristics song by after the digital quantity received processing
Line.
6. reliability on-line monitoring system as claimed in claim 1, it is characterised in that described data storage section uses ROM
Read-only storage.
7. reliability on-line monitoring system as claimed in claim 1, it is characterised in that described camera is installed on electricity to be measured
The surface of sub- component, when the electrical performance characteristics curve abnormality data occur, system can control camera, by electronics to be measured
The surface aging corrosion condition of component, stored in the form of video and real-time pictures are sent on display.
8. reliability on-line monitoring system as claimed in claim 7, it is characterised in that described camera is fixedly mounted on institute
On the electrical performance characteristics harvester for the part of data acquisition stated, and the electronics member device to be measured described in described camera face
Part.
A kind of 9. electrical performance characteristics method of testing of reliability on-line monitoring system described in claim 3, it is characterised in that including
Following steps：
(i) when measured electric current is direct current, the voltage at selected element both ends is measured with voltage measuring apparatus, obtains a magnitude of voltage
V1；Then, selected element both ends and connect a DC test power supply make by the DC test power supply and selected element form return
A test electric current I is produced in road1, and the voltage at selected element both ends is measured simultaneously, obtain a magnitude of voltage V2；Finally, public affairs are passed through
Formula：I=I1×V2/(V2-V1) working direct current in circuit-under-test is calculated；
(ii) when measured electric current is exchanges, first, the voltage V at selected element both ends is measured with frequency-selecting voltage measuring apparatus；
Then, it is connected in parallel on the alternating-current measurement power supply for sending sine wave and the frequency-selecting current measuring device being connected on test power supply selected
The both ends of element, measure test electric current It, the voltage V at element both ends selected by frequency-selecting voltage measuring apparatus measurest, calculate resistance
Anti- value Z=Vt/It；Finally, the operating current I, Z, V therein in selected element are calculated by formula I=V/Zt、It、V、I
It is vector；
(iii) when measured electric current had not only included alternating component but also had flip-flop, first, with output square-wave pulse signal
Power supply is tested, after series current measurement apparatus, is connected in parallel on the both ends of selected element, while survey in selected element both ends shunt voltage
Device is measured, measures the voltage V of output square wave high level respectivelyth, electric current IthWith voltage V during output square wave low levelt1、It1, lead to
Cross formula I1=(Ith·Vt1-Vth·It1)/(Vth-Vt1) calculate working direct current I in selected element1；
Then, the voltage V at selected element both ends is measured with frequency-selecting voltage measuring apparatus, with the alternating-current measurement power supply for sending sine wave
Frequency-selecting current measuring device with being connected on test power supply is connected in parallel on the both ends of selected element, measures test electric current It, simultaneously
The voltage V at selected element both ends is measured with frequency-selecting voltage measuring apparatust, calculate impedance value Z=Vt/It, pass through formula I2=V/
Z calculates the operating current I in selected element2；
Finally, formula I=I is passed through1+I2The operating current I in selected element is calculated, wherein, Z, Vt、It、V、I2, I be
Vector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710817304.0A CN107505525B (en) | 2017-09-12 | 2017-09-12 | Reliability on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710817304.0A CN107505525B (en) | 2017-09-12 | 2017-09-12 | Reliability on-line monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107505525A true CN107505525A (en) | 2017-12-22 |
| CN107505525B CN107505525B (en) | 2020-10-20 |
Family
ID=60696212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710817304.0A Active CN107505525B (en) | 2017-09-12 | 2017-09-12 | Reliability on-line monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107505525B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038263A (en) * | 2006-03-13 | 2007-09-19 | 华为技术有限公司 | Method and system for estimating circuit board corrosion risk |
| US20110151597A1 (en) * | 2009-12-18 | 2011-06-23 | United Microelectronics Corp. | Analysis method for semiconductor device |
| CN102937611A (en) * | 2012-12-06 | 2013-02-20 | 华为技术有限公司 | Corrosion risk prompting method and early warning system |
| CN104280398A (en) * | 2013-07-05 | 2015-01-14 | 上海维锐智能科技有限公司 | Electronic component automatic testing device |
| CN104597389A (en) * | 2014-12-23 | 2015-05-06 | 北京自动测试技术研究所 | Quick evaluation method for plastic encapsulated integrated circuit reliability under marine environment condition |
| CN104678211A (en) * | 2014-12-30 | 2015-06-03 | 同济大学 | Real-time testing and analysis system for electrical characteristics and breakdown characteristics of thin films |
| CN104730470A (en) * | 2015-03-27 | 2015-06-24 | 国家电网公司 | Electrical performance parameter processing method and testing system |
| CN105092461A (en) * | 2015-09-14 | 2015-11-25 | 北京科技大学 | Metal corrosion high-throughput characterization experimental apparatus based on image |
-
2017
- 2017-09-12 CN CN201710817304.0A patent/CN107505525B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038263A (en) * | 2006-03-13 | 2007-09-19 | 华为技术有限公司 | Method and system for estimating circuit board corrosion risk |
| US20110151597A1 (en) * | 2009-12-18 | 2011-06-23 | United Microelectronics Corp. | Analysis method for semiconductor device |
| CN102937611A (en) * | 2012-12-06 | 2013-02-20 | 华为技术有限公司 | Corrosion risk prompting method and early warning system |
| CN104280398A (en) * | 2013-07-05 | 2015-01-14 | 上海维锐智能科技有限公司 | Electronic component automatic testing device |
| CN104597389A (en) * | 2014-12-23 | 2015-05-06 | 北京自动测试技术研究所 | Quick evaluation method for plastic encapsulated integrated circuit reliability under marine environment condition |
| CN104678211A (en) * | 2014-12-30 | 2015-06-03 | 同济大学 | Real-time testing and analysis system for electrical characteristics and breakdown characteristics of thin films |
| CN104730470A (en) * | 2015-03-27 | 2015-06-24 | 国家电网公司 | Electrical performance parameter processing method and testing system |
| CN105092461A (en) * | 2015-09-14 | 2015-11-25 | 北京科技大学 | Metal corrosion high-throughput characterization experimental apparatus based on image |
Non-Patent Citations (1)
| Title |
|---|
| 向敏等: "腐蚀在线监测系统可靠性研究", 《西南石油大学学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107505525B (en) | 2020-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201654130U (en) | Automatic measuring and calibrating device of high-impedance measuring apparatus | |
| CN102072999B (en) | Connection testing device of electric energy metering device and using method thereof | |
| CN101556302B (en) | Ultrasound partial discharge diagnostic equipment and method thereof | |
| CN102854447B (en) | Portable photovoltaic subassembly power testing instrument and testing method thereof | |
| CN206892194U (en) | The device of the accurate detection accumulator internal resistance of pulse constant current electric discharge | |
| CN202041583U (en) | Sweep-frequency measuring device for short-circuit impedance of transformer | |
| CN103954852A (en) | Low-frequency noise testing method of high-voltage high-capacity capacitor | |
| CN108562860A (en) | Electric energy meter two-way accessory power supply power consumption Auto-Test System and test method | |
| CN108957380A (en) | The development of capacitance type potential transformer no-load voltage ratio, polarity test instrument | |
| CN105372620A (en) | Power metering detector | |
| CN107505525A (en) | A kind of reliability on-line monitoring system | |
| CN104678134A (en) | AC constant current source, internal resistance detecting device of cell and cell testing instrument | |
| CN203164306U (en) | High precision grounding resistor testing instrument | |
| CN207439502U (en) | A kind of water level sensor based on friction electric induction | |
| CN102749523A (en) | Direct-current ground resistance detection circuit applied to photovoltaic inverter system | |
| CN204439819U (en) | AC type lightning arrester on-Line Monitor Device detector | |
| CN109374978A (en) | A kind of cable dielectric loss improvement measuring circuit and method based on bridge method | |
| CN201289525Y (en) | Checkout device for zinc oxide lightning arrester tester | |
| CN105115885B (en) | A kind of portable ground net corrosion condition monitoring system and monitoring method | |
| CN208296948U (en) | A kind of volume correction instrument comprehensive performance verifying attachment | |
| CN103698675B (en) | A kind of analytical method and system thereof for shelf depreciation under oscillation mode surge voltage | |
| CN208520919U (en) | Crystal oscillator detection circuit | |
| CN106154194A (en) | AC type spark gap on-Line Monitor Device detector | |
| CN103308744B (en) | High-tension cable gauze screen ground wire leakage current detector | |
| CN207896934U (en) | A kind of component generated energy contrast test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xia Kequan Inventor after: Zhu Zhiyuan Inventor after: Xu Zhiwei Inventor after: Yang Lijie Inventor after: Li Min Inventor after: Li Nayu Inventor after: Song Chunyi Inventor before: Xia Kequan Inventor before: Zhu Zhiyuan Inventor before: Xu Zhiwei Inventor before: Yang Lijie Inventor before: Li Min Inventor before: Li Nayu |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |