CN2192891Y

CN2192891Y - Control detector for electric circuit plate

Info

Publication number: CN2192891Y
Application number: CN 93223411
Authority: CN
Inventors: 胡南
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-01
Filing date: 1993-09-01
Publication date: 1995-03-22
Anticipated expiration: 2003-09-01

Abstract

The utility model discloses a control detector for a circuit board, comprising an oscillating control circuit, a detecting signal generating circuit, a detecting circuit and a power supply. The utility model can detect the failures of a short circuit, a broken circuit, electric leakage, etc. of 1-200 circuits once. The utility model which has simple circuit structure, convenient operation, low cost and strong applicability is suitable for the tests of all kinds of circuit boards, increasing the efficiency detecting the circuit board, and the efficiency is not lower than the efficiency of a computer.

Description

Control detector for electric circuit plate

The utility model relates to line fault testing device, relates in particular to board quality control detection device.

Existing line fault detecting device can not detect a large amount of circuits simultaneously, and when needs detected a large amount of line fault, workload was big, not only complexity but also take manpower, thereby often adaptability is not strong.At present, also favourable user with the computer testing apparatus, but contain the testing apparatus complex structure of computer, cost is high again.

The purpose of this utility model is to provide a kind of once can detect many circuits simultaneously, easy to use, board quality control detection device that cost is low that efficient can be comparable with computer.

Technical solution of the present utility model is as follows: it is made up of oscillation control circuit, detection signal generation circuit, testing circuit and four parts of power supply.Oscillation control circuit is made of towards integrated circuit 2 oscillators and one ten serial vein, detection signal generation circuit is made of several signal generating unit circuit, each signal generating unit is made up of towards integrated circuit 2 ten serial veins, it produces 20 train pulses, having only a pulse in these 20 train pulses is noble potential, and its after pulse is in low-potential state.Testing circuit is made up of several detection cell circuit, and detection cell circuit comprises that 20 electronic switches, some triodes, phase inverter, the light emitting diode that are made of 5 integrated switching circuits form.The oscillation pulse signal of an oscillator generation is as the clock input signal of ten serial veins in the control circuit towards integrated circuit, the oscillating impulse that second oscillator produces and anti-phase after oscillation pulse signal add to two ten serial veins in the signal generation unit circuit respectively towards the input end of clock of integrated circuit, the oscillation frequency of second oscillator is 100 times of first oscillator oscillation frequency.

The utility model circuit constitutes simple, and is easy to use, can detect simultaneously 200 circuits short circuit, open circuit, fault such as electric leakage, he has improved the efficient of testing circuit plate.

Fig. 1: be circuit theory diagrams of the present utility model;

Fig. 2: be the utility model integrated switching circuit 4066 wiring diagrams.

Oscillation control circuit of the present utility model comprises 2 oscillating integrated circuit IC1(555), IC2(555), ten serial veins are towards integrated circuit (IC) 3(4017), the oscillation frequency f of oscillator IC2 ₂Oscillation frequency f for oscillator IC1 ₁100 times.Detection signal generation circuit comprises 1～10 detection signal generating unit, each detection signal generating unit circuit by 2 ten serial veins towards integrated circuit (IC) 4(4017), IC5(4017) form.Testing circuit comprises 1～10 detection cell circuit, and each detection cell circuit comprises 20 electronic switches being made of 5 integrated switching circuits (IC4066), by 20 light emitting diodes (detection branch that opens circuit that the ground connection of L1～L20) constitutes, 20 triodes (BG1～BG20), 20 phase inverters (F1～F20), 20 light emitting diodes (D1～D20).Power supply is by voltage stabilizer IC6(7805) constitute, voltage stabilizer IC6(7805) output terminal pin 2 output+5V voltages are as oscillator IC1, IC2 working power, and being connected to the RESET input pin 15 and the clock input end pin 13 of ten serial veins towards integrated circuit (IC) 3, oscillator IC1 output terminal pin 3 connects the input end of clock pin 14 of ten serial veins towards integrated circuit (IC) 3.Ten serial veins towards ten output terminal pin 1 of integrated circuit (IC) 3 to pin 7, pin 9 is to the control signal of the anti-phase back of the output signal of pin 11 as each detection signal generation unit, be connected in each unit ten serial veins towards input end pin 15, the pin 13 of integrated circuit, as shown in Figure 1: ten serial veins connect ten serial veins towards integrated circuit (IC) 4, IC5 input end pin 15, pin 13 towards integrated circuit (IC) 3 output terminal pin 1 behind phase inverter A.Oscillator IC2 output terminal pin 3 signals and inversion signal thereof are imported as the clock of 2 ten preface integrated circuit in each detection signal generation unit respectively, promptly be connected to input end pin 14, referring to Fig. 1: oscillator IC2 output terminal pin 3 connects ten serial veins towards integrated circuit (IC) 5 input end of clock pin 14, and oscillator IC2 output terminal pin 3 is connected to the input end of clock pin 14 of ten serial veins towards integrated circuit (IC) 4 through phase inverter A1.Ten serial veins in the signal generation unit are towards integrated circuit (IC) 4, IC5 other nine output terminals except that pin 3 are connected to the input end of integrated switching circuit IC4066 in the switch element circuit successively, constitute 20 gate-controlled switches by 5 switch integrated circuits in each unit, its 20 gate-controlled switch contact K1～K20 are made of the input end of integrated switching circuit IC4066, output terminal constitutes gate-controlled switch test contacts 1～20, test contacts 1～20 connects triode BG1～BG20 base stage through biasing resistor R1～R20 respectively, the emitter of triode BG1～BG20 meets respective switch contact K1～K20 successively, collector is connected in series phase inverter F1～F20 respectively, and light emitting diode D1～D20 extremely, and 20 detection branch that open circuit in the detection cell circuit are made of light emitting diode L1～L20 ground connection.Ten train pulse control signals that ten serial veins are exported towards integrated circuit (IC) 2 in output terminal pin 3 signals and the control circuit in the signal generation unit are delivered to XOR gate simultaneously, and its XOR output connects corresponding gate-controlled switch contact.Referring to Fig. 1: ten serial veins are delivered to XOR gate X1, X2 towards integrated circuit (IC) 3 output terminal pin 1 output signal behind phase inverter A, ten serial veins are connected to XOR gate X1, X2 respectively towards integrated circuit (IC) 4, IC5 output terminal pin 3, and XOR gate X1, X2 output is connected to corresponding gate-controlled switch K6, K16 respectively.

When carrying out wireline inspection, with between the light emitting diode L1～L20 of lead to be detected cross-over connection successively in the

test contacts

1,2,3 etc. and the detection branch that opens circuit, because two ten serial veins clock input signal in the integrated circuit is an inversion signal each other in the detection signal generation unit, is example with ten serial veins towards integrated circuit (IC) 4, IC5, and then two of its generation ten serial veins are complementary signal towards signal.Have only a pulse noble potential in these 20 train pulses like this, its after pulse all is in low-potential state.Gate-controlled switch of each train pulse control control, the conducting when pulse high-voltage of this switch ends during low-voltage.Therefore, the light emitting diode L1～L20 in each detecting unit, luminous successively because of driven by train pulse, can whether luminous successively by observing these light emitting diodes, just can judge whether path, open circuit.Because each transistor base and emitter are all introduced the pulse signal of homophase under corresponding gate-controlled switch conducting situation, under the situation that the short-circuit type electric leakage is not arranged between the test point, each triode all ends, light emitting diode D1～D20 etc. by and not luminous.But, if occur short circuit or leak current fault between test lead, conducting such as wherein the pulse noble potential can make corresponding triode conducting by electric leakage in the short circuit between circuit, corresponding light emitting diode and luminous, thus indicate short circuit or leak current fault between lead.

Claims

1, a kind of board quality control detection device, it is made up of oscillation control circuit, detection signal generation circuit, testing circuit and power supply, it is characterized in that:

(a) oscillation control circuit comprises 2 oscillators (IC1, IC2) and one ten serial vein towards integrated circuit (IC3), its oscillation frequency f ₂=100f ₁Ten serial veins connect+5 volts of power supplys towards integrated circuit (IC3) the RESET input pin 15 and clock input end pin 13, input end of clock pin 14 connects oscillator (IC1) output terminal pin 3, ten output terminal pin 1 to pin 7, pin 9 to ten train pulse signal inversion of pin 11 outputs, as the control signal of detection signal generation circuit;

(b) detection signal generation circuit comprises 1～10 detection signal generation unit, the detection signal generation unit by 2 ten serial veins towards integrated circuit (IC4, IC5) form, 2 ten serial veins in each unit are imported the oscillator signal and the inversion signal thereof of oscillator (IC2) pin 3 outputs respectively towards integrated circuit clock input end pin 14, ten serial veins are delivered to XOR gate simultaneously towards the control signal corresponding of integrated circuit (IC2) output in its output terminal pin 3 signals and the control circuit, its XOR output and other nine ten serial veins are connected to switch integrated circuit in the switch element circuit (IC4066) input end successively towards output terminal, and its RESET input pin 13 connects corresponding control signal;

(c) testing circuit comprises 1～10 detection cell circuit, each detection cell circuit comprises 20 electronic switches that 5 switch integrated circuits (IC:4066) constitute, by 20 light emitting diodes (detection branch that opens circuit that the ground connection of L1～L20) constitutes, 20 triodes (BG1～BG20), 20 phase inverters (F1～F20), 20 light emitting diodes (D1～D20); (R1～R20) connects the triode (base stage of BG1～BG20) to test contacts 1～20 through biasing resistor respectively, (emitter of BG1～BG20) connects the respective switch contact, and (K1～K20), its collector is connected in series phase inverter (F1～F20) and diode (D1～D20) to ground respectively to triode.