CN101191824B - Power voltage detecting circuit - Google Patents

Power voltage detecting circuit Download PDF

Info

Publication number
CN101191824B
CN101191824B CN 200610157131 CN200610157131A CN101191824B CN 101191824 B CN101191824 B CN 101191824B CN 200610157131 CN200610157131 CN 200610157131 CN 200610157131 A CN200610157131 A CN 200610157131A CN 101191824 B CN101191824 B CN 101191824B
Authority
CN
China
Prior art keywords
switch
connector
voltage
pin
capacitive load
Prior art date
Application number
CN 200610157131
Other languages
Chinese (zh)
Other versions
CN101191824A (en
Inventor
袁志胜
肖人军
甘小林
何有光
Original Assignee
鸿富锦精密工业(深圳)有限公司
鸿海精密工业股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 鸿富锦精密工业(深圳)有限公司, 鸿海精密工业股份有限公司 filed Critical 鸿富锦精密工业(深圳)有限公司
Priority to CN 200610157131 priority Critical patent/CN101191824B/en
Publication of CN101191824A publication Critical patent/CN101191824A/en
Application granted granted Critical
Publication of CN101191824B publication Critical patent/CN101191824B/en

Links

Abstract

The invention discloses a power supply voltage test circuit, comprising a power supply voltage input unit, a test unit, a power supply output unit, a switch control unit and a capacitive load module, wherein the capacitive load module comprises a plurality of capacitive loads; the power supply voltage input unit is connected to the power supply output unit through the test unit to output the corresponding power supply voltage; the switch control unit is connected with the power supply input unit; a capacitive load selected according to different power supplies to be tested is arranged between the switch control unit and the capacitive load module. The test unit ensures that the test of the filtering noise and noise property of the power supply voltage is more accurate and the arranged switch control unit and the capacitive load result in a faster test of the compatibility of the power supply voltage, thereby further improving the overall test accuracy and efficiency.

Description

Power voltage detecting circuit

Technical field

The present invention relates to a kind of test circuit, particularly a kind of can carrying out accurately and the power voltage detecting circuit of test fast to the correlation properties of the supply voltage of power supply unit output.

Background technology

Along with the raising of computer run frequency, also more and more stricter to for every performance requirement of the supply voltage of computer motherboard power supply.The required supply voltage of computer motherboard is that the power module by power supply unit provides, and just seems particularly important so the supply voltage of described power module output is carried out the correlated performance test.The test that need carry out according to regulation and stipulation and customer requirement comprises a lot of types, and wherein, filtering noise, noise test and the compatibility test under inserting the capacitive load situation suffered during to each supply voltage work are requisite in the test.

At present, when the supply voltage of power supply unit output was carried out above-mentioned performance test, existing test circuit comprised some connectors, filter capacitor and electronic load.Corresponding power input interface on described some connector analog computer mainboards.Each voltage output end connector of power supply unit is inserted the corresponding connector that has now on the test circuit, and press code requirement two filter capacitors in parallel between tie point between each output voltage and the described connector and ground, behind each output voltage, connect corresponding electronic load.When testing, the tie point place between each output voltage and the described connector is connected to an oscillograph by a lead, is read the filtering noise and the noise properties of each output voltage by the demonstration on the described oscillograph; Insert the capacitive load and the electronic load of regulation and stipulation at each output voltage terminal, and judge the compatible situation of each output voltage by the demonstration on the described electronic load.

Yet, renewal along with standard, the pin of available circuit connector can not satisfy the testing requirement of various types of power supply units, simultaneously, because directly with lead voltage output end being connected to oscillograph, to test the shield effectiveness of filtering noise and noise poor, so the accuracy of influence test in addition, need be welded the reduction that described capacitive load also causes testing efficiency respectively when carrying out compatibility test at every turn.

Summary of the invention

In view of foregoing, be necessary to provide a kind of power voltage detecting circuit that can accurately reach quick test to the correlation properties of supply voltage.

A kind of power voltage detecting circuit comprises a supply voltage input block, a test cell, a supply voltage output unit, a switch control unit and a capacitive load module; Described capacitive load module comprises some capacitive loads, described supply voltage input block is connected to described supply voltage output unit exporting corresponding supply voltage by described test cell, and described switch control unit is connected between described supply voltage input block and the described capacitive load module with according to the different different capacitive loads of power supply unit selection to be measured.

Compare prior art, described test cell can make the test of the filtering noise of described supply voltage and noise properties more accurate, the adding of described switch control unit and capacitive load module can make the compatibility test of described supply voltage quicker, thereby makes integrated testability precision and testing efficiency further be improved.

Description of drawings

Below in conjunction with accompanying drawing and better embodiment the present invention is described in further detail:

Fig. 1 is the block scheme of the better embodiment of power voltage detecting circuit of the present invention.

Fig. 2 is the circuit diagram of the better embodiment of power voltage detecting circuit of the present invention.

Embodiment

See also Fig. 1 and Fig. 2, the better embodiment of power voltage detecting circuit of the present invention comprises a supply voltage input block 10, test cell 20, supply voltage output unit 30, a switch control unit 40 and a capacitive load module 50.Described supply voltage input block 10 is connected to described supply voltage output unit 30 exporting corresponding supply voltage by described test cell 20, and described switch control unit 40 is connected between described supply voltage input block 10 and the described capacitive load module 50 with according to the different different capacitive loads of power supply unit selection to be measured.

Described supply voltage input block 10 comprises some connector P1~P8 and an input switch PS.Described connector P1~P8 is used for the corresponding power interface on the analog computer mainboard.For the test request of the supply voltage standard that satisfies ATX and BTX simultaneously, the described first connector P1 is one 24 pin connector, gives the power interface of whole computer motherboard power supply in order to simulation; The described first connector P1 includes and satisfies the input voltage pin that ATX and BTX power specifications require simultaneously, and promptly voltage is+the first input voltage pin 9 of 5Vsb; Voltage is+some second input voltage pins 1,2,12,13 of 3.3V; Voltage is-the 3rd input voltage pin 14 of 12V; Voltage is+the 4th input voltage pin 10,11 of 12V1 and voltage is some the 5th input voltage pins 4,6,21~23 of+5V.The described first connector P1 also includes a PS_ON switch pin 16 and some grounding pins.The switch pin 16 of the described first connector P1 is connected to the end A of the input switch PS of described supply voltage input block 10, the other end B ground connection of described input switch PS.The described second connector P2 is little four pin connectors, in order to the power interface of simulation to central processing unit power supply, its have voltage for+12V2 and interconnected the 6th input voltage pin 1,2; Its grounding pin 3,4 ground connection.Described the 3rd, the 4th, the 5th and the 6th connector P3~P6 is big four pin connectors, gives the power interface of hard disk and CD-ROM drive power supply in order to simulation; Wherein, the 4th input voltage pin 1 of described the 3rd, the 4th connector P3, P4 links to each other and is connected to the 4th input voltage pin 10,11 of the described first connector P1; The 6th input voltage pin 1 of described the 5th, the 6th connector P5, P6 links to each other and is connected to the 6th input voltage pin 1,2 of the described second connector P2; Second, third pin 2,3 equal ground connection of described the 3rd, the 4th, the 5th and the 6th connector P3~P6, the 5th input voltage pin 4 link to each other and are connected to the 5th input voltage pin 21 of the described first connector P1.Described the 7th connector P7 is one six a pin connector, in order to the power interface of simulation to the peripheral element power supply; Its 4th input voltage pin 1,2 and 3 links to each other and is connected to the 4th input voltage pin 10,11 of the described first connector P1, all the other pin ground connection.Described the 8th connector P8 is an AC adapter connector, and one is connected to the 4th input voltage pin 1 of described the 7th connector P7, other end ground connection.

Described test cell 20 comprises some ceramic condenser C01~C06, some electrochemical capacitor C001~C006 and some calibrating terminal P01~P06.According to supply voltage test specification regulation, the specification of described ceramic condenser C01~C06 is 25V/0.1uF; The specification of described electrochemical capacitor C001~C006 is 25V/10uF; Described calibrating terminal P01~P06 all has good noise shield effectiveness.

Described supply voltage output unit 30 comprise one in order to first output terminal 31 of exporting first output voltage+5Vsb, in order to second output terminal 32 of exporting second output voltage+3.3V, in order to the 3rd output terminal 33 of exporting the 3rd output voltage-12V, in order to the 4th output terminal 34 of exporting the 4th output voltage+12V1, in order to the 5th output terminal 35 and of exporting the 5th output voltage+5V in order to export the 6th output terminal 36 of the 6th output voltage+12V2.Described first output terminal 31 is connected to the first input voltage pin 9 of the described first connector P1; Described second output terminal 32 is connected to the second input voltage pin 13 of the described first connector P1; Described the 3rd output terminal 33 is connected to the 3rd input voltage pin 14 of the described first connector P1; Described the 4th output terminal 34 is connected to the 4th input voltage pin 1 of described the 4th connector P4; Described the 5th output terminal 35 is connected to the 5th input voltage pin 21 of the described first connector P1; Described the 6th output terminal 36 is connected to the 6th input voltage pin 1 of described the 6th connector P6.The described first ceramic condenser C01, the first electrochemical capacitor C001 and the first calibrating terminal P01 are connected in parallel between described first output terminal 31 and the ground; The described second ceramic condenser C02, the second electrochemical capacitor C002 and the second calibrating terminal P02 are connected in parallel between described second output terminal 32 and the ground; Described the 3rd ceramic condenser C03, the 3rd electrochemical capacitor C003 and the 3rd calibrating terminal P03 are connected in parallel between described the 3rd output terminal 33 and the ground; Described the 4th ceramic condenser C04, the 4th electrochemical capacitor C004 and the 4th calibrating terminal P04 are connected in parallel between described the 4th output terminal 34 and the ground; Described the 5th ceramic condenser C05, the 5th electrochemical capacitor C005 and the 5th calibrating terminal P05 are connected in parallel between described the 5th output terminal 35 and the ground; Described the 6th ceramic condenser C06, the 6th electrochemical capacitor C006 and the 6th calibrating terminal P06 are connected in parallel between described the 6th output terminal 36 and the ground.

Described switch control unit 40 comprises one first switch S 01, a second switch S02 and one the 3rd switch S 03.Described first switch S 01 is one seven the tunnel directly to unplug the pass, and one of its first via switch S 1 is connected to the 3rd input voltage pin 14 of the described first connector P1; One of its second way switch S2 is connected to the first input voltage pin 9 of the described first connector P1; One of its Third Road switch S 3 is connected to the 4th input voltage pin 1 of described the 3rd connector P3; One of its four-way switch S4 is connected to the 5th input voltage pin 6 of the described first connector P1; One of its 5th way switch S5 is connected to the second input voltage pin 1 of the described first connector P1; One of its 6th way switch S6 is connected to the 4th input voltage pin 10 of the described first connector P1; One of its 7th way switch S7 is connected to the 6th input voltage pin 1 of the described second connector P2.Described second switch S02 and the 3rd switch S 03 are single-pole double-throw switch (SPDT), and the first end A2 of wherein said second switch S02 is connected to the other end of the first via switch S 1 of described first switch S 01; The first end A3 of described the 3rd switch S 03 is connected to the other end of the four-way switch S4 of described first switch S 01.

Described capacitive load module 50 comprises one first capacitive load C1, the second capacitive load C2, the 3rd capacitive load C3, the 4th capacitive load C4, the 5th a capacitive load C5, the 6th capacitive load C6, the 7th a capacitive load C7 and one the 8th capacitive load C8.According to the compatibility test requirement of supply voltage, the described first capacitive load C1, the second capacitive load C2 and the 5th capacitive load C5 are the electrochemical capacitor that specification is 25V/10000uF; Described the 3rd capacitive load C3 and the 4th capacitive load C4 are the electrochemical capacitor that specification is 25V/330uF; Described the 6th capacitive load C6 is that specification is the electrochemical capacitor of 16V/6000uF; Described the 7th capacitive load C7 is that specification is the electrochemical capacitor of 25V/5000uF; Described the 8th capacitive load C8 is that specification is the electrochemical capacitor of 25V/3000uF.Wherein, the negative electrode of the described first capacitive load C1 and the second capacitive load C2 links to each other and is connected to the second end B2 of described second switch S02; The equal ground connection of its anode.The negative electrode of described the 3rd capacitive load C3 is connected to the 3rd end C2 of described second switch S02, its plus earth.The anode of described the 4th capacitive load C4 is connected to the other end of the second way switch S2 of described first switch S 01, its plus earth.The anode of described the 5th capacitive load C5 is connected to the other end of Third Road switch S 3 of described first switch S 01 and the second end B3 of described the 3rd switch S 03, its plus earth simultaneously.The anode of described the 6th capacitive load C6 is connected to the other end of the 5th way switch S5 of described first switch S 01 and the 3rd end C3 of described the 3rd switch S 03, its plus earth.The anode of described the 7th capacitive load C7 and the 8th capacitive load C8 is connected to the 6th way switch S6 of described first switch S 01 and the other end of the 7th way switch S7, the equal ground connection of its negative electrode respectively.

Before carrying out the supply voltage performance test, the voltage out connector difference correspondence of one power supply unit to be measured is inserted on the described connector P1~P8 of described supply voltage input block 10, some electronic loads (figure does not show) of analog computer mainboard duty are inserted the corresponding output terminal of described supply voltage output unit 30.After closing described input switch PS, described power supply unit promptly can provide corresponding output voltage.This moment, the probe with an oscillograph (figure does not show) inserted filtering noise and the noise properties of the described calibrating terminal P01~P06 of described test cell 20 with test corresponding voltage output terminal respectively.When carrying out the capacitive load test of supply voltage,, then connect the A2 of the described second switch S02 in the described switch control unit 40 and the A3 and the B3 end of B2 end and described the 3rd switch S 03 if described power supply unit satisfies the ATX standard; If described power supply unit satisfies the BTX standard, then connect the A2 of the described second switch S02 in the described switch control unit 40 and the A3 and the C3 end of C2 end and described the 3rd switch S 03; The output supply voltage of the test respective straight of closing described first switch S 01 unplugs the pass as required then, and judges the compatible situation of each corresponding output voltage by the demonstration on the described electronic load.

Described power voltage detecting circuit can better contact and have the described calibrating terminal P01~P06 of better shield effectiveness with described oscillographic probe by increasing in described test cell 20, thereby makes described filtering noise and noise properties test more accurate; Because the design of described switch control unit 40 and capacitive load module 50 is used, save the test duration simultaneously, improved integrated testability efficient.

Claims (10)

1. a power voltage detecting circuit comprises a supply voltage input block, a test cell, a supply voltage output unit, a switch control unit and a capacitive load module; Described capacitive load module comprises some capacitive loads, described supply voltage input block is connected to described supply voltage output unit exporting corresponding supply voltage by described test cell, and described switch control unit is connected between described supply voltage input block and the described capacitive load module with according to the different different capacitive loads of power supply unit selection to be measured.
2. power voltage detecting circuit as claimed in claim 1, it is characterized in that: described supply voltage input block comprises first to the 8th totally eight connectors and input switch, and described first to the 8th connector is in order to the corresponding power interface on the analog computer mainboard; Wherein, described first connector comprises a switch pin and accepts first to the 5th input voltage pin of first to the 5th output voltage of described power supply unit to be measured respectively; The switch pin of described first connector is connected to an end of described input switch, the other end ground connection of described input switch; Described second connector comprises the 6th input voltage pin of the 6th output voltage of accepting described power supply unit to be measured; Described the 3rd, the 4th connector comprises corresponding respectively the 4th, the 5th input voltage pin that is connected to the 4th, the 5th input voltage pin of described first connector; Described the 5th, the 6th connector comprises respectively the 5th, the 6th input voltage pin of the 6th input voltage pin of corresponding the 5th input voltage pin that is connected to described first connector and second connector, and described the 7th connector comprises the 4th input voltage pin of the 4th voltage input voltage pin that is connected to described first connector; One of described the 8th connector is connected to the 4th input voltage pin of described the 7th connector, other end ground connection.
3. power voltage detecting circuit as claimed in claim 2 is characterized in that: described first connector is the connector of one 24 pin, gives the power interface of whole computer motherboard power supply in order to simulation.
4. power voltage detecting circuit as claimed in claim 2 is characterized in that: described second connector is little four pin connectors, in order to the power interface of simulation to the central processing unit power supply.
5. power voltage detecting circuit as claimed in claim 2 is characterized in that: described the 3rd, the 4th, the 5th and the 6th connector is big four pin connectors, gives the power interface of hard disk and CD-ROM drive power supply in order to simulation.
6. power voltage detecting circuit as claimed in claim 2 is characterized in that: described the 7th connector is one or six pin connectors, in order to the power interface of simulation to the peripheral element power supply; Described the 8th connector is an AC adapter connector.
7. power voltage detecting circuit as claimed in claim 2 is characterized in that: described supply voltage output unit comprises first to the 6th totally six output terminals, with totally six output voltages of corresponding output first to the 6th respectively; Corresponding respectively first to the 6th input voltage pin that is connected to described supply voltage input block of described first to the 6th output terminal.
8. power voltage detecting circuit as claimed in claim 7 is characterized in that: described test cell comprises first to the 6th totally six ceramic condensers, six electrochemical capacitors and six calibrating terminals; Each ceramic condenser is connected in parallel between the corresponding output terminal and ground with corresponding electrochemical capacitor and calibrating terminal respectively.
9. power voltage detecting circuit as claimed in claim 2 is characterized in that: described switch control unit comprises one first switch, a second switch and one the 3rd switch; Described first switch is one seven the tunnel directly to unplug the pass, corresponding respectively the 3rd, first, the 4th, the 5th, second, the 4th, the 6th input voltage pin that is connected to described supply voltage input block of one end of its first to the 7th way switch, the other end of second, third of described first switch, the 5th, the 6th and the 7th way switch correspondence respectively is connected to described capacitive load module; Described second switch and the 3rd switch are single-pole double-throw switch (SPDT), and first of wherein said second switch is connected to the other end of the first via switch of described first switch; First of described the 3rd switch is connected to the other end of the four-way switch of described first switch, and second end of second end of described second switch and the 3rd end and described the 3rd switch and the 3rd end correspondence respectively are connected to described capacitive load module.
10. power voltage detecting circuit as claimed in claim 9 is characterized in that: described capacitive load module comprises first to the 8th totally eight capacitive loads, and described capacitive load is electrochemical capacitor; Wherein, corresponding respectively second end, second end and the 3rd end that is connected to described second switch of the negative electrode of described first, second and third capacitive load, the equal ground connection of its anode; Corresponding respectively the 6th way switch of the 3rd end of second end of the other end of second way switch of described first switch, described the 3rd switch, described the 3rd switch, described first switch and the other end of the 7th way switch of being connected to of the anode of described the 4th to the 8th capacitive load, the equal ground connection of its negative electrode, and the anode of described the 5th capacitive load and the 6th capacitive load also is connected respectively to the other end of the 5th way switch of the other end of Third Road switch of described first switch and described first switch simultaneously.
CN 200610157131 2006-11-29 2006-11-29 Power voltage detecting circuit CN101191824B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200610157131 CN101191824B (en) 2006-11-29 2006-11-29 Power voltage detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200610157131 CN101191824B (en) 2006-11-29 2006-11-29 Power voltage detecting circuit

Publications (2)

Publication Number Publication Date
CN101191824A CN101191824A (en) 2008-06-04
CN101191824B true CN101191824B (en) 2010-05-26

Family

ID=39486947

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200610157131 CN101191824B (en) 2006-11-29 2006-11-29 Power voltage detecting circuit

Country Status (1)

Country Link
CN (1) CN101191824B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101893656B (en) * 2009-05-22 2012-03-14 鸿富锦精密工业(深圳)有限公司 Voltage detection circuit and voltage detection and correction method thereof
CN102207742B (en) * 2010-03-30 2014-01-15 鸿富锦精密工业(深圳)有限公司 Voltage control device
CN102263514A (en) * 2010-05-31 2011-11-30 鸿富锦精密工业(深圳)有限公司 Direct current regulated power supply apparatus
CN102540104A (en) * 2010-12-28 2012-07-04 鸿富锦精密工业(深圳)有限公司 Testing device
CN102175962B (en) * 2011-01-30 2013-03-13 深圳创维数字技术股份有限公司 Testing method and testing device
CN103852630A (en) * 2012-11-30 2014-06-11 联想(北京)有限公司 Supply voltage detection method and device
CN103091645B (en) * 2012-12-02 2015-12-16 威海广泰空港设备股份有限公司 There is the interchange 400Hz intermediate frequency power supply test macro of electric energy feedback function
CN106125010A (en) * 2016-06-15 2016-11-16 北京世纪东方通讯设备有限公司 A kind of method of testing for GSM R communication system and device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357574A (en) * 1979-05-21 1982-11-02 Takamisawa Cybernetics Co., Ltd. Loading apparatus for testing a power supply
CN1459637A (en) * 2002-05-20 2003-12-03 神达电脑股份有限公司 Working voltage testing method of power supplier and its system
CN1740803A (en) * 2004-08-24 2006-03-01 鸿富锦精密工业(深圳)有限公司 Electric resistance loading system
CN2831154Y (en) * 2005-08-31 2006-10-25 鸿富锦精密工业(深圳)有限公司 Switching power feeder detector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357574A (en) * 1979-05-21 1982-11-02 Takamisawa Cybernetics Co., Ltd. Loading apparatus for testing a power supply
CN1459637A (en) * 2002-05-20 2003-12-03 神达电脑股份有限公司 Working voltage testing method of power supplier and its system
CN1740803A (en) * 2004-08-24 2006-03-01 鸿富锦精密工业(深圳)有限公司 Electric resistance loading system
CN2831154Y (en) * 2005-08-31 2006-10-25 鸿富锦精密工业(深圳)有限公司 Switching power feeder detector

Also Published As

Publication number Publication date
CN101191824A (en) 2008-06-04

Similar Documents

Publication Publication Date Title
CN103257286B (en) A kind of charging electric vehicle facility automatic test approach and system
CN102592068B (en) The method and its system of malice circuit in fpga chip are detected using power consumption analysis
KR101370728B1 (en) Test module with blocks of universal and specific resources
CN101435838B (en) Apparatus for measuring capacitance capacity
CN201540533U (en) Computer system
CN101435841B (en) Test system and method
CN200986484Y (en) Magnetic field sensor
CN104062969A (en) Hardware-in-loop simulation testing system and testing method for automobile
CN102023912B (en) Dormancy wake-up testing system and method
US20020062461A1 (en) Method and system for testing microprocessor based boards in a manufacturing environment
JP4291769B2 (en) Contact detection method
CN102750252A (en) Circuit capable of reusing universal serial bus (USB)/ universal asynchronous receiver/ transmitter (UART) interfaces and electronic device using same
CN102081145B (en) Functional verification platform of battery management system
CN102135920B (en) Fault injection system for embedded spaceborne computer and injection method thereof
US20090105983A1 (en) Test definer, a method of automatically determining and representing functional tests for a pcb having analog components and a test system
CN101751316B (en) Universal serial bus (USB) interface module testing device
CN102353865A (en) Automatic testing device and method universally used for multiple bus processor modules
US6330622B1 (en) Direct processor access via an external multi-purpose interface
CN101996121B (en) Universal serial bus (USB) port testing device and testing method
CN103197256A (en) State of charge (SOC) estimation method of lithium ion battery
US20100013495A1 (en) Testing card for peripheral component interconnect interfaces
US20130268708A1 (en) Motherboard test device and connection module thereof
CN104076814A (en) Automobile ECU measurement system based on hardware-in-loop simulation
CN2842445Y (en) Power supply parameter testing system
CN103792498A (en) Automatic power supply testing method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C53 Correction of patent for invention or patent application
CB03 Change of inventor or designer information

Inventor after: Yuan Zhisheng

Inventor after: Xiao Renjun

Inventor after: Gan Xiaolin

Inventor after: He Youguang

Inventor before: Yuan Zhisheng

Inventor before: Xiao Renjun

Inventor before: Gan Xiaolin

Inventor before: He Youguang

C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100526

Termination date: 20121129