CN108254645A - A kind of exclusion quality detection device - Google Patents
A kind of exclusion quality detection device Download PDFInfo
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- CN108254645A CN108254645A CN201810216632.XA CN201810216632A CN108254645A CN 108254645 A CN108254645 A CN 108254645A CN 201810216632 A CN201810216632 A CN 201810216632A CN 108254645 A CN108254645 A CN 108254645A
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- 230000007717 exclusion Effects 0.000 title claims abstract description 62
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 230000005611 electricity Effects 0.000 claims description 4
- 230000003760 hair shine Effects 0.000 abstract description 2
- 230000011664 signaling Effects 0.000 description 2
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- 235000008434 ginseng Nutrition 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/01—Subjecting similar articles in turn to test, e.g. "go/no-go" tests in mass production; Testing objects at points as they pass through a testing station
- G01R31/013—Testing passive components
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Abstract
The present invention relates to a kind of exclusion quality detection devices, belong to electronic technology field.The present invention includes exclusion socket, combination multi-way switch circuit, combination variable connector control circuit, window voltage comparator, 555 multi-resonant oscillating circuits, exclusion quality display circuit；Wherein combination variable connector control circuit includes 74LS390 counters and 74LS138 decoders；Exclusion quality display circuit includes 74LS194 shift registers I, 74LS194 displacement shift registers II and LED light.The present invention is compared one by one by each pin voltage to being inserted into exclusion, the quality of each pin of exclusion can intuitively be reflected by the light on and off situation of LED light, when resistance damages, corresponding LED light shines, specific pin resistance quality situation in exclusion can be detected automatically quick, accurate and visually, convenient for rapidly and accurately detecting the quality of exclusion.
Description
Technical field
The present invention relates to a kind of exclusion quality detection devices, belong to electronic technology field.
Background technology
Exclusion has many advantages, such as that easy to assembly, packing density is high, has been widely used in television set, computer main board, family at present
In electrical appliance.At present, it when repairing associated appliance, needs to be detected exclusion quality, the detection method of traditional exclusion quality
It is that each pin is detected one by one with multimeter, Detection accuracy is not high, and needs repeated detection, inefficiency.
Invention content
The technical problem to be solved by the present invention is to：The present invention provides a kind of exclusion quality detection device, for solving exclusion
The problem of quality is difficult to detect can detect the fine or not situation of specific pin resistance in exclusion automatically quick, accurate and visually.
The technical scheme is that：A kind of exclusion quality detection device, including exclusion socket 1, combination multi-way switch circuit
2nd, combination variable connector control circuit 3, window voltage comparator 4,555 multi-resonant oscillating circuits 5, exclusion quality display circuit 6；Its
Middle combination variable connector control circuit 3 includes 74LS390 counters 8 and 74LS138 decoders 7；Exclusion quality display circuit 6 wraps
Include 74LS194 shift registers I, 74LS194 displacement shift registers II and LED light；The exclusion socket 1 is more with combining
Path switching circuit 2 connects, and 74LS390 counters 8,74LS138 decoders 7, combination multi-way switch circuit 2 are sequentially connected, and are combined
Multi-way switch circuit 2, window voltage comparator 4,74LS194 shift registers I, 74LS194 displacements shift register II, LED
Indicator light is sequentially connected, and 555 multi-resonant oscillating circuits 5 respectively connected 74LS194 shift registers I, 74LS194 displacement displacements are posted
Storage II and 74LS390 counters 8, respectively its offer clock pulses；
No. 0 of the exclusion socket 1~No. 7 sockets are respectively with combining the hair of PNP type triode T0~T7 in multi-way switch circuit 2
Emitter-base bandgap grading connects, and No. 8 sockets of exclusion socket 1 are connect with+5V power supplys；
The combination multi-way switch circuit 2 includes PNP type triode T0, T1, T2, T3, T4, T5, T6, T7, PNP type triode
The base stage of T0, T1, T2, T3, T4, T5, T6, T7 respectively with 15 feet of 74LS138 decoders 7,14 feet, 13 feet, 12 feet, 11 feet,
10 feet, 9 feet, the connection of 7 feet, the collector of PNP type triode T0~T7 are connected to the input terminal of window voltage comparator 4；
1 foot of the 74LS390 counters 8 is connect with the collector of PNP type triode T8, the base of 7 feet and PNP type triode T8
Pole connects, and 2 feet are connected with the output terminal of NOT gate N1, and the input terminal of NOT gate N1 is grounded by reset switch K；74LS390 counters 8
3 feet and the connection of 4 feet after connect with 1 foot of 74LS138 decoders 7,5 feet of 74LS390 counters 8,6 feet respectively with
2 feet of 74LS138 decoders 7, the connection of 3 feet；6 feet of 74LS138 decoders 7 are connect with+5V power supplys, 4 feet, 5 feet ground connection；
The window voltage comparator 4 includes resistance R10, R11, R12, R13, potentiometer, voltage comparator A1, A2, two poles
Pipe D3, D4；The wherein in-phase input end of voltage comparator A1, the inverting input of voltage comparator A2 while and potentiometer
One end connection, as the input terminal of window voltage comparator 4, potentiometerThe other end and sliding end be grounded；Voltage compares
The one end of the inverting input of device A1 respectively with resistance R10, resistance R11 is connect, and the other end of resistance R10 is connect with+5V power supplys,
In-phase input end of the other end of resistance R11 respectively with one end of resistance R12, voltage comparator A2 is connect, and resistance R12's is another
End ground connection；Anode of the output terminal of voltage comparator A1, A2 respectively with diode D3, D4 is connect, and the cathode of diode D3, D4 are same
When connect with 2 feet of 74LS194 registers I, and pass through resistance R13 and be grounded；
The exclusion quality display circuit 6 further include resistance R0, R1, R2, R3, R4, R5, R6, R7, LED light L0, L1, L2,
L3、L4、L5、L6、L7；Wherein 12 feet of 74LS194 shift registers II, 13 feet, 14 feet, 15 feet, 74LS194 shift registers
The one end of I 12 feet, 13 feet, 14 feet, 15 feet respectively with resistance R0, R1, R2, R3, R4, R5, R6, R7 is connect, resistance R0, R1,
Anode of the other end of R2, R3, R4, R5, R6, R7 respectively with LED light L0, L1, L2, L3, L4, L5, L6, L7 is connect, LED
The minus earth of indicator light L0, L1, L2, L3, L4, L5, L6, L7；12 feet of 74LS194 shift registers I are shifted with 74LS194
The 2 feet connection of register II；1 foot of 74LS194 shift registers I and 1 foot of 74LS194 shift registers II are opened by resetting
K ground connection is closed, 9 feet of 74LS194 shift registers I and 9 feet of 74LS194 shift registers II are connect with+5V power supplys,
10 feet of 74LS194 shift registers I and the 10 feet ground connection of 74LS194 shift registers II, 74LS194 shift registers I
11 feet of 11 feet and 74LS194 shift registers II are connect with the collector of PNP type triode T8.
555 multi-resonant oscillating circuit 5 includes 555 chips, resistance R8, R9, capacitance C1, C2, diode D1, D2；Wherein
The 1 foot ground connection of 555 chips, 2 feet and 5 feet are connected respectively by capacitance C1, C2 and ground terminal, and 8 feet, 4 feet are connect with+5V power supplys, and 7
Foot is connect by resistance R8 with+5V power supplys, and 7 feet are connect with the anode of diode D1, the cathode of diode D1 and 6 feet of chip and
2 feet connect, and diode D2 is connected in parallel on 2 feet and 7 feet of 555 chips, 3 feet and three pole of positive-negative-positive of 555 chips after connecting with resistance R9
The emitter connection of pipe T8.
The present invention operation principle be：
Exclusion to be measured is inserted into, by voltage deviceResistance value is adjusted to identical with surveyed exclusion resistance value；Power on, 74LS390 is counted
Device 8 is operated in decade counter state, terminal count output：7 feet, 3 feet, 5 feet, the output of 6 feet are low level, at this point, being connect with 7 feet
PNP type triode T8 conducting, 555 multi-resonant oscillating circuits 5 generate clock pulse signal given respectively by transistor emitter
74LS390 counters 8,74LS194 shift registers I and 74LS194 displacement shift registers II；74LS390 counters 8 generate
Count signal exported as address signal to L4LS138 decoders 7, L4LS138 decoders 7 are exported according to address signal and are decoded
To multi-way switch circuit 2, the PNP type triode in multi-way switch circuit 2 sequentially turns on signal, and each pin of exclusion is sequentially ingressed into
Window voltage comparator 4, after each pin of exclusion access window voltage comparator 4 with potentiometerEqual component voltage, in window voltage
In comparator 4 ,+5V power supplys divide to obtain reference voltage through resistance R10, R11, R12With, when access pin voltage is situated between
In reference voltageWithBetween when, window voltage comparator 4 export low level signal；When access pin voltage is more than ginseng
Examine voltageOr less than reference voltageWhen, window voltage comparator 4 exports high level signal；Window voltage comparator 4 is defeated
The low and high level signal gone out is deposited in the 74LS194 shift registers I being attached thereto, and window voltage comparator 4 often compares one
The voltage signal of a exclusion pin, 74LS194 shift registers I and 74LS194 shift shift register II in clock pulses
The low and high level signal of input is just moved to right one successively under effect, finally, represent 8 pins of exclusion 8 level signals according to
The secondary output terminal for being shifted to the right to corresponding 74LS194 shift registers I and 74LS194 displacement shift registers II, in this way, exclusion 8
The fine or not situation of a pin is all reflected by corresponding LED light light on and off situation；
In window voltage comparator 4, exclusion common end is connect with+5V power supplys, after exclusion pin access window voltage comparator 4
Pass through potentiometerGround connection, when the pin resistance does not damage, with potentiometerEqual component voltage, the comparison voltage of input
It is worth for+2.5V, between reference voltage=3.75V withBetween=1.25V, window voltage comparator 4 exports low level signal
To 74LS194 shift registers I, corresponding LED light does not shine；When accessing the damage of pin resistance, access resistance is shown as
Short circuit or open circuit, the comparing voltage value inputted at this time is respectively+5V and 0V, more than reference voltage=3.75V and less than reference
Voltage=1.25V, window voltage comparator 4 export high level signal to 74LS194 shift registers I, corresponding LED light
Luminous prompting；
Under the clock pulses of 555 multi-resonant oscillating circuits 5, after 74LS390 counters 8 generate 8 count signals, exclusion 8 is completed
The detection of a pin resistance, at this point, the 7 feet output of 74LS390 counters 8 is high level, the PNP type triode being connect with 7 feet
T8 ends, and the clock pulses provided of 555 multi-resonant oscillating circuits 5 is cut off, and 74LS390 counters 8 stop counting, 74LS194
Shift register I and 74LS194 displacement shift registers II keep current output state, no longer move to right, when observing that exclusion draws
Foot correspond to LED light shine when, illustrate the pin resistance damage；
After an exclusion detection is completed, new exclusion to be measured is inserted into, presses reset switch K, ground signalling is given through reset switch K
1 pin preset end of 74LS194 shift registers I and 74LS194 shift registers II, I He of 74LS194 shift registers
74LS194 shift registers II are reset under the action of reset signal；Meanwhile ground signalling exports high electricity after NOT gate N1 overturnings
It puts down to 2 pin preset ends of the 74LS390 counters 8 connected with non-gate output terminal, 74LS390 counters 8 are in the work of reset signal
It is reset with lower count；At this point, the 7 feet output of 74LS390 counters 8 is low level, the PNP type triode T8 being connect with 7 feet is led
Logical, 74LS390 counters 8,74LS194 shift registers I and 74LS194 displacement shift registers II are again in 555 multi-harmonic-oscillations
Cycle operation under the clock pulse signal that circuit 5 generates carries out the detection of exclusion pin.
The beneficial effects of the invention are as follows：
The present invention is compared one by one by each pin voltage to being inserted into exclusion, can be incited somebody to action by the light on and off situation of LED light
The quality of each pin of exclusion intuitively reflects, and when resistance damages, corresponding LED light shines, can be automatically quick, accurate
Really specific pin resistance quality situation in exclusion is intuitively detected, convenient for rapidly and accurately detecting the quality of exclusion.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
Each label in Fig. 1：1- exclusion sockets, 2- combination multi-way switch circuits, 3- combination variable connector control circuits, 4- windows
Mouth voltage comparator, 5-555 multi-resonant oscillating circuits, 6- exclusion quality display circuits, 7-74LS138 decoders, 8-74LS390 meters
Number device, T0~T8-PNP type triodes,Potentiometer, A1~A2- voltage comparators, D1~D4- diodes, N1- NOT gates,
R0~R13- resistance, C1~C2- capacitances, L0~L7-LED indicator lights, K- reset switches.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the invention will be further described.
Embodiment 1：As shown in Figure 1, a kind of exclusion quality detection device, including exclusion socket 1, combination multi-way switch circuit
2nd, combination variable connector control circuit 3, window voltage comparator 4,555 multi-resonant oscillating circuits 5, exclusion quality display circuit 6；Its
Middle combination variable connector control circuit 3 includes 74LS390 counters 8 and 74LS138 decoders 7；Exclusion quality display circuit 6 wraps
Include 74LS194 shift registers I, 74LS194 displacement shift registers II and LED light；The exclusion socket 1 is more with combining
Path switching circuit 2 connects, and 74LS390 counters 8,74LS138 decoders 7, combination multi-way switch circuit 2 are sequentially connected, and are combined
Multi-way switch circuit 2, window voltage comparator 4,74LS194 shift registers I, 74LS194 displacements shift register II, LED
Indicator light is sequentially connected, and 555 multi-resonant oscillating circuits 5 respectively connected 74LS194 shift registers I, 74LS194 displacement displacements are posted
Storage II and 74LS390 counters 8, respectively its offer clock pulses；
No. 0 of the exclusion socket 1~No. 7 sockets are respectively with combining the hair of PNP type triode T0~T7 in multi-way switch circuit 2
Emitter-base bandgap grading connects, and No. 8 sockets of exclusion socket 1 are connect with+5V power supplys；
The combination multi-way switch circuit 2 includes PNP type triode T0, T1, T2, T3, T4, T5, T6, T7, PNP type triode
The base stage of T0, T1, T2, T3, T4, T5, T6, T7 respectively with 15 feet of 74LS138 decoders 7,14 feet, 13 feet, 12 feet, 11 feet,
10 feet, 9 feet, the connection of 7 feet, the collector of PNP type triode T0~T7 are connected to the input terminal of window voltage comparator 4；
1 foot of the 74LS390 counters 8 is connect with the collector of PNP type triode T8, the base of 7 feet and PNP type triode T8
Pole connects, and 2 feet are connected with the output terminal of NOT gate N1, and the input terminal of NOT gate N1 is grounded by reset switch K；74LS390 counters 8
3 feet and the connection of 4 feet after connect with 1 foot of 74LS138 decoders 7,5 feet of 74LS390 counters 8,6 feet respectively with
2 feet of 74LS138 decoders 7, the connection of 3 feet；6 feet of 74LS138 decoders 7 are connect with+5V power supplys, 4 feet, 5 feet ground connection；
The window voltage comparator 4 includes resistance R10, R11, R12, R13, potentiometer, voltage comparator A1, A2, two poles
Pipe D3, D4；The wherein in-phase input end of voltage comparator A1, the inverting input of voltage comparator A2 while and potentiometer
One end connection, as the input terminal of window voltage comparator 4, potentiometerThe other end and sliding end be grounded；Voltage compares
The one end of the inverting input of device A1 respectively with resistance R10, resistance R11 is connect, and the other end of resistance R10 is connect with+5V power supplys,
In-phase input end of the other end of resistance R11 respectively with one end of resistance R12, voltage comparator A2 is connect, and resistance R12's is another
End ground connection；Anode of the output terminal of voltage comparator A1, A2 respectively with diode D3, D4 is connect, and the cathode of diode D3, D4 are same
When connect with 2 feet of 74LS194 registers I, and pass through resistance R13 and be grounded；
The exclusion quality display circuit 6 further include resistance R0, R1, R2, R3, R4, R5, R6, R7, LED light L0, L1, L2,
L3、L4、L5、L6、L7；Wherein 12 feet of 74LS194 shift registers II, 13 feet, 14 feet, 15 feet, 74LS194 shift registers
The one end of I 12 feet, 13 feet, 14 feet, 15 feet respectively with resistance R0, R1, R2, R3, R4, R5, R6, R7 is connect, resistance R0, R1,
Anode of the other end of R2, R3, R4, R5, R6, R7 respectively with LED light L0, L1, L2, L3, L4, L5, L6, L7 is connect, LED
The minus earth of indicator light L0, L1, L2, L3, L4, L5, L6, L7；12 feet of 74LS194 shift registers I are shifted with 74LS194
The 2 feet connection of register II；1 foot of 74LS194 shift registers I and 1 foot of 74LS194 shift registers II are opened by resetting
K ground connection is closed, 9 feet of 74LS194 shift registers I and 9 feet of 74LS194 shift registers II are connect with+5V power supplys,
10 feet of 74LS194 shift registers I and the 10 feet ground connection of 74LS194 shift registers II, 74LS194 shift registers I
11 feet of 11 feet and 74LS194 shift registers II are connect with the collector of PNP type triode T8.
Further, 555 multi-resonant oscillating circuit 5 includes 555 chips, resistance R8, R9, capacitance C1, C2, diode
D1、D2；The 1 foot ground connection of wherein 555 chips, 2 feet and 5 feet are connected respectively by capacitance C1, C2 and ground terminal, 8 feet, 4 feet and+5V
Power supply connects, and 7 feet are connect by resistance R8 with+5V power supplys, and 7 feet are connect with the anode of diode D1, the cathode of diode D1 and
6 feet of chip and the connection of 2 feet, diode D2 are connected in parallel on 2 feet and 7 feet of 555 chips, 3 feet of 555 chips after connecting with resistance R9
It is connect with the emitter of PNP type triode T8.
Specific embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned realities
Example is applied, it within the knowledge of a person skilled in the art, can also be under the premise of present inventive concept not be departed from
Various changes can be made.
Claims (2)
1. a kind of exclusion quality detection device, it is characterised in that：Including exclusion socket（1）, combination multi-way switch circuit（2）, group
Close variable connector control circuit（3）, window voltage comparator（4）, 555 multi-resonant oscillating circuits（5）, exclusion quality display circuit
（6）；Wherein combine variable connector control circuit（3）Including 74LS390 counters（8）With 74LS138 decoders（7）；Exclusion is good
Bad display circuit（6）Including 74LS194 shift registers（Ⅰ）, 74LS194 displacement shift register（Ⅱ）And LED light；Institute
State exclusion socket（1）With combining multi-way switch circuit（2）Connection, 74LS390 counters（8）, 74LS138 decoders（7）, combination
Multi-way switch circuit（2）It is sequentially connected, combines multi-way switch circuit（2）, window voltage comparator（4）, 74LS194 shift LDs
Device（Ⅰ）, 74LS194 displacement shift register（Ⅱ）, LED light be sequentially connected, 555 multi-resonant oscillating circuits（5）It connects respectively
74LS194 shift registers（Ⅰ）, 74LS194 displacement shift register（Ⅱ）With 74LS390 counters（8）, respectively its carry
For clock pulses；
The exclusion socket（1）No. 0~No. 7 sockets respectively with combining multi-way switch circuit（2）Middle PNP type triode T0~T7
Emitter connection, exclusion socket（1）No. 8 sockets connect with+5V power supplys；
The combination multi-way switch circuit（2）Including PNP type triode T0, T1, T2, T3, T4, T5, T6, T7, PNP type triode
The base stage of T0, T1, T2, T3, T4, T5, T6, T7 respectively with 74LS138 decoders（7）15 feet, 14 feet, 13 feet, 12 feet, 11
Foot, 10 feet, 9 feet, the connection of 7 feet, the collector of PNP type triode T0~T7 are connected to window voltage comparator（4）Input terminal；
The 74LS390 counters（8）1 foot connect with the collector of PNP type triode T8,7 feet and PNP type triode T8's
Base stage connects, and 2 feet are connected with the output terminal of NOT gate N1, and the input terminal of NOT gate N1 is grounded by reset switch K；74LS390 is counted
Device（8）3 feet and 4 feet connection after with 74LS138 decoders（7）1 foot connection, 74LS390 counters（8）5 feet, 6 feet point
Not with 74LS138 decoders（7）2 feet, 3 feet connection；74LS138 decoders（7）6 feet connect with+5V power supplys, 4 feet, 5 feet
Ground connection；
The window voltage comparator（4）Including resistance R10, R11, R12, R13, potentiometer, voltage comparator A1, A2, two
Pole pipe D3, D4；The wherein in-phase input end of voltage comparator A1, the inverting input of voltage comparator A2 while and potentiometerOne end connection, as window voltage comparator（4）Input terminal, potentiometerThe other end and sliding end be grounded；Electricity
The one end of the inverting input of pressure comparator A1 respectively with resistance R10, resistance R11 is connect, the other end and the+5V electricity of resistance R10
Source connects, and the in-phase input end of the other end of resistance R11 respectively with one end of resistance R12, voltage comparator A2 is connect, resistance
The other end ground connection of R12；Anode of the output terminal of voltage comparator A1, A2 respectively with diode D3, D4 is connect, diode D3,
The cathode of D4 simultaneously with 74LS194 registers（Ⅰ）The connection of 2 feet, and pass through resistance R13 and be grounded；
The exclusion quality display circuit（6）Further include resistance R0, R1, R2, R3, R4, R5, R6, R7, LED light L0, L1,
L2、L3、L4、L5、L6、L7；Wherein 74LS194 shift registers（Ⅱ）12 feet, 13 feet, 14 feet, 15 feet, 74LS194 displacement
Register（Ⅰ）One end respectively with resistance R0, R1, R2, R3, R4, R5, R6, R7 of 12 feet, 13 feet, 14 feet, 15 feet connect, electricity
Hinder the other end anode with LED light L0, L1, L2, L3, L4, L5, L6, L7 respectively of R0, R1, R2, R3, R4, R5, R6, R7
Connection, the minus earth of LED light L0, L1, L2, L3, L4, L5, L6, L7；74LS194 shift registers（Ⅰ）12 feet with
74LS194 shift registers（Ⅱ）2 feet connection；74LS194 shift registers（Ⅰ）1 foot and 74LS194 shift registers
（Ⅱ）1 foot be grounded by reset switch K, 74LS194 shift registers（Ⅰ）9 feet and 74LS194 shift registers（Ⅱ）'s
9 feet are connect with+5V power supplys, 74LS194 shift registers（Ⅰ）10 feet and 74LS194 shift registers（Ⅱ）10 feet ground connection,
74LS194 shift registers（Ⅰ）11 feet and 74LS194 shift registers（Ⅱ）11 feet and PNP type triode T8 current collection
Pole connects.
2. exclusion quality detection device according to claim 1, it is characterised in that：555 multi-resonant oscillating circuit（5）Packet
Include 555 chips, resistance R8, R9, capacitance C1, C2, diode D1, D2；The 1 foot ground connection of wherein 555 chips, 2 feet and 5 feet lead to respectively
Capacitance C1, C2 and ground terminal is crossed to connect, 8 feet, 4 feet are connect with+5V power supplys, and 7 feet are connect by resistance R8 with+5V power supplys, 7 feet and
The anode connection of diode D1, the cathode of diode D1 and 6 feet of chip and 2 feet connect, after diode D2 connects with resistance R9
2 feet and 7 feet of 555 chips are connected in parallel on, 3 feet of 555 chips are connect with the emitter of PNP type triode T8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810216632.XA CN108254645B (en) | 2018-03-16 | 2018-03-16 | Device for detecting resistance of discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810216632.XA CN108254645B (en) | 2018-03-16 | 2018-03-16 | Device for detecting resistance of discharge |
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| CN108254645A true CN108254645A (en) | 2018-07-06 |
| CN108254645B CN108254645B (en) | 2023-09-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111736099A (en) * | 2020-07-30 | 2020-10-02 | 格力电器（郑州）有限公司 | Connecting wire detection method and circuit |
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