CN208092159U - A kind of exclusion quality detection device - Google Patents
A kind of exclusion quality detection device Download PDFInfo
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- CN208092159U CN208092159U CN201820357437.4U CN201820357437U CN208092159U CN 208092159 U CN208092159 U CN 208092159U CN 201820357437 U CN201820357437 U CN 201820357437U CN 208092159 U CN208092159 U CN 208092159U
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Abstract
The utility model is related to a kind of exclusion quality detection devices, belong to electronic technology field.The utility model 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 utility model 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 utility model is related 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.Currently, when repairing associated appliance, need to be detected exclusion quality, the detection method of traditional exclusion quality
It is to be detected one by one to each pin with multimeter, Detection accuracy is not high, and needs repeated detection, inefficiency.
Invention content
The technical problems to be solved in the utility model is:The utility model provides a kind of exclusion quality detection device, is used for
It solves the problems, such as that exclusion quality is difficult to detect, can detect specific pin resistance in exclusion automatically quick, accurate and visually
Fine or not situation.
Technical solutions of the utility model are:A kind of exclusion quality detection device, including exclusion socket 1, combination variable connector
Circuit 2, combination variable connector control circuit 3, window voltage comparator 4,555 multi-resonant oscillating circuits 5, exclusion quality display circuit
6;Wherein combination variable connector control circuit 3 includes 74LS390 counters 8 and 74LS138 decoders 7;Exclusion quality display electricity
Road 6 includes 74LS194 shift registers I, 74LS194 displacement shift registers II and LED light;The exclusion socket 1 with
It combines multi-way switch circuit 2 to connect, 74LS390 counters 8,74LS138 decoders 7, combination multi-way switch circuit 2 connect successively
It connects, combination multi-way switch circuit 2, window voltage comparator 4,74LS194 shift registers I, 74LS194 shift shift register
II, LED light is sequentially connected, and 555 multi-resonant oscillating circuits 5 respectively connected 74LS194 shift registers I, 74LS194 displacements
Shift register II and 74LS390 counters 8, respectively its offer clock pulses;
No. 0 of the exclusion socket 1~No. 7 sockets respectively with combine PNP type triode T0~T7 in multi-way switch circuit 2
Emitter connection, No. 8 sockets of exclusion socket 1 connect with+5V power supplys;
The combination multi-way switch circuit 2 includes PNP type triode T0, T1, T2, T3, T4, T5, T6, T7, three pole of positive-negative-positive
The base stage of pipe T0, T1, T2, T3, T4, T5, T6, T7 respectively with 15 feet of 74LS138 decoders 7,14 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 the input terminal of window voltage comparator 4;
1 foot of the 74LS390 counters 8 is connect with the collector of PNP type triode T8,7 feet and PNP type triode T8
Base stage connection, 2 feet connect with the output end of NOT gate N1, and the input terminal of NOT gate N1 is grounded by reset switch K;74LS390 is counted
Connect with 1 foot of 74LS138 decoders 7 after 3 feet of number devices 8 and the connection of 4 feet, 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,
Diode 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 the input terminal of window voltage comparator 4, potentiometerThe other end and sliding end be grounded;Voltage ratio
Inverting input compared with device A1 is connect with one end of resistance R10, resistance R11 respectively, and the other end and the+5V power supplys of resistance R10 connect
It connects, the other end of resistance R11 is connect with the in-phase input end of one end of resistance R12, voltage comparator A2 respectively, resistance R12's
The other end is grounded;The output end of voltage comparator A1, A2 are connect with the anode of diode D3, D4 respectively, the moon of diode D3, D4
Pole is connect with 2 feet of 74LS194 registers I simultaneously, and is grounded by resistance R13;
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 displacements
12 feet, 13 feet, 14 feet, 15 feet of register I are connect with one end of resistance R0, R1, R2, R3, R4, R5, R6, R7 respectively, resistance
The other end of R0, R1, R2, R3, R4, R5, R6, R7 connect with the anode of LED light L0, L1, L2, L3, L4, L5, L6, L7 respectively
It connects, the minus earth of LED light L0, L1, L2, L3, L4, L5, L6, L7;12 feet of 74LS194 shift registers I with
2 feet of 74LS194 shift registers II connect;1 foot of 74LS194 shift registers I and the 1 of 74LS194 shift registers II
Foot is grounded by reset switch K, 9 feet of 74LS194 shift registers I and 9 feet of 74LS194 shift registers II and+5V electricity
Source connects, and 10 feet of 74LS194 shift registers I and the 10 feet ground connection of 74LS194 shift registers II, 74LS194 displacements are posted
11 feet of storage I and 11 feet of 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
1 foot of 555 chips is grounded, and 2 feet and 5 feet are connected by capacitance C1, C2 and ground terminal respectively, 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 of pipe T8 connects.
The operation principle of the utility model is:
It is inserted into exclusion to be measured, by voltage deviceResistance value is adjusted to identical as surveyed exclusion resistance value;Power on, 74LS390 meters
Number 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, connecting with 7 feet
The PNP type triode T8 conductings connect, the clock pulse signal that 555 multi-resonant oscillating circuits 5 generate are distinguished by transistor emitter
Shift register II is shifted to 74LS390 counters 8,74LS194 shift registers I and 74LS194;74LS390 counters 8 produce
Raw count signal is exported as address signal to L4LS138 decoders 7, and L4LS138 decoders 7 are translated according to address signal output
To multi-way switch circuit 2, the PNP type triode in multi-way switch circuit 2 sequentially turns on code signal, and each pin of exclusion is connect successively
Enter window voltage comparator 4, after each pin access window voltage comparator 4 of exclusion with potentiometerEqual component voltage, in window electricity
It presses 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 reference
VoltageOr it is less than reference voltageWhen, window voltage comparator 4 exports high level signal;Window voltage comparator 4 exports
Low and high level signal be deposited in the 74LS194 shift registers I being attached thereto, window voltage comparator 4 often compares one
The work of the voltage signal of exclusion pin, 74LS194 shift registers I and 74LS194 displacement shift registers II in clock pulses
The low and high level signal of input is just moved to right one successively with lower, finally, indicates 8 level signals of 8 pins of exclusion successively
It is shifted to the right to the output end of corresponding 74LS194 shift registers I and 74LS194 displacement shift registers II, in this way, exclusion 8
The fine or not situation of 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, and exclusion pin access window voltage compares
Pass through potentiometer after device 4Ground connection, when the pin resistance does not damage, with potentiometerEqual component voltage, the ratio of input
It is+2.5V compared with voltage value, between reference voltage=3.75V withBetween=1.25V, window voltage comparator 4 exports low electricity
Ordinary mail number gives 74LS194 shift registers I, corresponding LED light not to shine;When accessing the damage of pin resistance, resistance is accessed
Short circuit or open circuit are shown as, the comparing voltage value inputted at this time is respectively+5V and 0V, is more than reference voltage=3.75V and small
In reference voltage=1.25V, window voltage comparator 4 export high level signal to 74LS194 shift registers I, corresponding LED
Indicator light luminous prompting;
Under the clock pulses of 555 multi-resonant oscillating circuits 5, after 74LS390 counters 8 generate 8 count signals, the row of completion
The detection of 8 pin resistance is hindered, at this point, the 7 feet output of 74LS390 counters 8 is high level, three pole of positive-negative-positive being connect with 7 feet
Pipe T8 cut-offs, the clock pulses of 555 multi-resonant oscillating circuits 5 provided is cut off, and 74LS390 counters 8 stop counting,
74LS194 shift registers I and 74LS194 displacement shift registers II keep current output state, no longer move to right, when observing
Exclusion pin correspond to LED light shine when, illustrate the pin resistance damage;
After completing an exclusion detection, it is inserted into new exclusion to be measured, presses reset switch K, ground signalling is opened through resetting
K is closed to 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, work of the 74LS390 counters 8 in reset signal
It is reset with lower counting;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 utility model has the beneficial effects that:
The utility model is compared one by one by each pin voltage to being inserted into exclusion, can pass through the bright of LED light
Situation of going out intuitively reflects the quality of each pin of exclusion, and when resistance damages, corresponding LED light shines, can be certainly
It is dynamic to detect specific pin resistance quality situation in exclusion quick, accurate and visually, convenient for the good of rapidly and accurately detection exclusion
It is bad.
Description of the drawings
Fig. 1 is the utility model structure diagram.
Each label in Fig. 1:1- exclusion sockets, 2- combine multi-way switch circuit, and 3- combines variable connector control circuit, 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 implementation mode
Utility model will be further explained below with reference to the attached drawings and specific embodiments.
Embodiment 1:As shown in Figure 1, a kind of exclusion quality detection device, including exclusion socket 1, combination multi-way switch circuit
2, 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 with combine it is more
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 respectively with combine PNP type triode T0~T7 in multi-way switch circuit 2
Emitter connection, No. 8 sockets of exclusion socket 1 connect with+5V power supplys;
The combination multi-way switch circuit 2 includes PNP type triode T0, T1, T2, T3, T4, T5, T6, T7, three pole of positive-negative-positive
The base stage of pipe T0, T1, T2, T3, T4, T5, T6, T7 respectively with 15 feet of 74LS138 decoders 7,14 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 the input terminal of window voltage comparator 4;
1 foot of the 74LS390 counters 8 is connect with the collector of PNP type triode T8,7 feet and PNP type triode T8
Base stage connection, 2 feet connect with the output end of NOT gate N1, and the input terminal of NOT gate N1 is grounded by reset switch K;74LS390 is counted
Connect with 1 foot of 74LS138 decoders 7 after 3 feet of number devices 8 and the connection of 4 feet, 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,
Diode 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 the input terminal of window voltage comparator 4, potentiometerThe other end and sliding end be grounded;Voltage ratio
Inverting input compared with device A1 is connect with one end of resistance R10, resistance R11 respectively, and the other end and the+5V power supplys of resistance R10 connect
It connects, the other end of resistance R11 is connect with the in-phase input end of one end of resistance R12, voltage comparator A2 respectively, resistance R12's
The other end is grounded;The output end of voltage comparator A1, A2 are connect with the anode of diode D3, D4 respectively, the moon of diode D3, D4
Pole is connect with 2 feet of 74LS194 registers I simultaneously, and is grounded by resistance R13;
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 displacements
12 feet, 13 feet, 14 feet, 15 feet of register I are connect with one end of resistance R0, R1, R2, R3, R4, R5, R6, R7 respectively, resistance
The other end of R0, R1, R2, R3, R4, R5, R6, R7 connect with the anode of LED light L0, L1, L2, L3, L4, L5, L6, L7 respectively
It connects, the minus earth of LED light L0, L1, L2, L3, L4, L5, L6, L7;12 feet of 74LS194 shift registers I with
2 feet of 74LS194 shift registers II connect;1 foot of 74LS194 shift registers I and the 1 of 74LS194 shift registers II
Foot is grounded by reset switch K, 9 feet of 74LS194 shift registers I and 9 feet of 74LS194 shift registers II and+5V electricity
Source connects, and 10 feet of 74LS194 shift registers I and the 10 feet ground connection of 74LS194 shift registers II, 74LS194 displacements are posted
11 feet of storage I and 11 feet of 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;1 foot of wherein 555 chips is grounded, and 2 feet and 5 feet are connected by capacitance C1, C2 and ground terminal respectively, 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 embodiment of the utility model is explained in detail above in conjunction with attached drawing, but the utility model and unlimited
In above-described embodiment, within the knowledge of a person skilled in the art, the utility model can also not departed from
Various changes can be made under the premise of objective.
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 shift shift register(Ⅱ)And LED light;Institute
State exclusion socket(1)With combine 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 shift shift register(Ⅱ), LED light be sequentially connected, 555 multi-resonant oscillating circuits(5)It is separately connected
74LS194 shift registers(Ⅰ), 74LS194 shift shift register(Ⅱ)With 74LS390 counters(8), respectively its carry
For clock pulses;
The exclusion socket(1)No. 0~No. 7 sockets respectively with combine 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 end 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;Voltage
The inverting input of comparator A1 is connect with one end of resistance R10, resistance R11 respectively, the other end and the+5V power supplys of resistance R10
Connection, the other end of resistance R11 are connect with the in-phase input end of one end of resistance R12, voltage comparator A2 respectively, resistance R12
The other end ground connection;The output end of voltage comparator A1, A2 are connect with the anode of diode D3, D4 respectively, diode D3, D4's
Cathode simultaneously with 74LS194 registers(Ⅰ)The connection of 2 feet, and be grounded by resistance R13;
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)12 feet, 13 feet, 14 feet, 15 feet connect respectively with one end of resistance R0, R1, R2, R3, R4, R5, R6, R7, 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;1 foot of wherein 555 chips is grounded, and 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 of diode D1 connects, and 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.
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CN201820357437.4U CN208092159U (en) | 2018-03-16 | 2018-03-16 | A kind of exclusion quality detection device |
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CN201820357437.4U CN208092159U (en) | 2018-03-16 | 2018-03-16 | A kind of exclusion quality detection device |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108254645A (en) * | 2018-03-16 | 2018-07-06 | 昆明理工大学 | A kind of exclusion quality detection device |
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CN108254645A (en) * | 2018-03-16 | 2018-07-06 | 昆明理工大学 | A kind of exclusion quality detection device |
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