KR0173260B1 - Device and control method for component test with the function of signal converting - Google Patents

Abstract

The present invention relates to a component inspection device having a measurement signal switching function capable of applying a forward or reverse measurement signal as a measurement (inspection) signal to an inspection target electronic component, and a control method thereof. A PC for controlling the operation of the PC, a data input / output unit which is an interface unit for data input / output between the PC and the peripheral device, a measuring unit for outputting a measurement signal to be applied to an electronic component under control of the PC, and the data input / output unit According to the measurement signal switching unit for applying the measurement signal output from the measuring unit to the electronic component in the forward or reverse direction by the data input from the PC through the data, and a plurality of control data from the PC input through the data input / output unit LED driving unit to selectively turn on the LED, and the LED driving unit is turned on to indicate that the inspection electronic component is defective With multiple LEDs.

Description

Parts inspection device with measuring signal switching function and control method

1 is a block diagram showing the configuration of a component inspection apparatus according to the present invention,

2 is a circuit diagram showing the detailed configuration of the measurement signal switching unit of FIG.

3 (a), (b) is a state diagram according to an embodiment of the present invention,

4 is a flowchart showing the control procedure of the component inspection apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

1: personal computer (PC) 2: measuring unit

3: Measurement signal switching part 4: Data input / output (DIO) part

5: cylinder 6: solenoid valve

7: light emitting diode (LED) driver 8: upper part (Fixture)

9: lower picture 10: electronic component

11: light emitting diode (LED)

20: input circuit section 21, 22, R1 to R6, R'1 to R'16: relay

23,24: Multiplexer (MUX)

The present invention relates to a component inspection device for inspecting whether a tapered electronic component is defective in order to be assembled on a printed circuit board, and in particular, a measurement signal capable of applying a measurement (inspection) signal to a test target electronic component in a forward and reverse direction. A component inspection apparatus having a switching function and a control method thereof.

In general, a component inspection device for inspecting whether a tapered electronic component is defective in a sequencer device, which is one of the factory automation devices, lowers an upper picture having a plurality of probes when the electronic components to be inspected are transferred to the lower picture. The test terminal is in contact with the lead terminal of each electronic component, and a predetermined measurement signal is applied to the electronic component through the contact test contact. As a result, whether the measured value such as the voltage difference between the electronic components is equal to the standard value. By comparison, it is determined whether the electronic component is defective.

In the parts to be inspected by the component inspection apparatus and having a positive pole such as a diode, when the forward signal or the reverse signal is applied, the operation and measured values of the parts are different.

However, in the related art, the measurement signal is applied only in a predetermined direction (for example, a forward direction), and there is a problem that is impossible when the component is to be inspected by applying the measurement signal in a different direction (for example, a reverse direction).

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is a component inspection apparatus having a measurement signal switching function capable of applying a measurement signal generated to inspect the electronic component to both ends of the electronic component in the forward and reverse directions. And to provide a control method thereof.

As a technical means for achieving the above object, the present invention provides a component inspection apparatus for inspecting whether an electronic component is defective,

PC for controlling the operation of each device provided in the component inspection device,

A data input / output unit which is an interface unit that enables data exchange between the PC and a peripheral device;

A measuring unit which outputs a measurement signal to be applied to the electronic component under control of the PC;

A measurement signal switching unit for applying the measurement signal output from the measurement unit in the forward or reverse direction to the component by a control signal of a PC input through the data input / output unit;

An LED driver for selectively lighting a plurality of LEDs according to a control signal from the PC input through the data input / output unit;

Lighted by the LED driving unit is characterized in that it comprises a plurality of LEDs indicating that the inspection electronic component is defective.

It will be described below with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a component inspection apparatus according to the present invention, in which a personal computer (hereinafter referred to as PC) 1 for controlling the overall operation of the component inspection apparatus and +/- in accordance with the control signal of the PC 1; The electronic part which contacts the measurement part 2 which outputs a measurement signal, and the +/- measurement signal input from the measurement part 2 by the control of the said PC 1 between upper and lower pictures 8 and 9; The measurement signal switching unit 3 which is applied to the component in the forward and reverse directions, the data input / output unit 4 which is an interface unit for data communication between the PC 1 and the peripheral device, and the upper picture 8 are raised and lowered. A cylinder (5), a solenoid valve (6) for adjusting the pneumatic (or hydraulic pressure) inside the cylinder (5) so that the cylinder (5) moves left and right (or up and down), and control from the PC (1). LED driving to light a plurality of light emitting diodes (hereinafter referred to as LEDs) 11 provided in the lower picture 9 according to a signal. And a (7).

In the above description, reference numeral 8 denotes an upper picture having a plurality of probes, 9 denotes a lower picture, 10 denotes a plurality of electronic components to be inspected, and 11 denotes a defect at the respective inspection position. Indicates a number of LEDs to indicate.

FIG. 2 is a circuit diagram showing the detailed configuration of the measurement signal switching unit shown in FIG. 1, which receives the control signal from the PC 1 of FIG. 1 and controls the control signals R17 and R18 for controlling the switching operation of the relay. An input circuit section 20 for outputting input data RM1 to RM4 and outputting a ± measurement signal input from the measurement section 2 as it is, and an input terminal at the +/- measurement signal output end of the input circuit section 20; Each of the plurality of contacts A1 to A16 and B1 to B16 connected to the lead terminal of the electronic component is connected in parallel to the first and second contacts, and the first and second contacts are connected to each other by the control signals R17 and R18. First and second relays 21 and 22 for selectively connecting two contacts, one output terminal of the first and second relays 21 and 22, and a plurality of one contacts B1 to B16 contacting the plurality of components. A plurality of relays R1 to R16 connected in series with each other and conducting / blocking operation according to inputs of the control signals RB1 to RB16, and other relays 21 and 22; A plurality of relays R'1 to R'16 provided in series between an output terminal and a plurality of other contacts A1 to A16 in contact with the plurality of components and conducting / blocking operation in accordance with a control signal input, Two multiplexers (hereinafter referred to as MUXs) 23 for outputting a control signal for selectively conducting one of the plurality of relays R1 to R16 and (R'1 to R'16) in accordance with input data from the measuring section 2. And (24).

Hereinafter, the operation and effect of the present invention by the above configuration will be described in detail.

In FIG. 1, when a plurality of electronic components 10 are transferred to the inspection position, the PC 1 outputs a control signal so that the upper picture 8 descends. The control signal is applied to the solenoid valve 6 through the data input / output unit 4, and the hydraulic pressure (pneumatic) in the cylinder 5 is changed by the opening / closing operation of the solenoid valve 6 according to the control signal. The cylinder 5 moves to lower the upper picture 8. When the inspection target electronic parts 10 come into contact with the upper and lower pictures 8 and 9 due to the lowering of the upper picture 8, the PC 1 outputs a measurement signal for testing the electronic parts. The control signal is output to (2), and the data including the inspection information such as the measurement signal application direction (for example, forward direction, reverse direction), etc. is output to the measurement signal switching section 3 through the data input / output section 4. Accordingly, the measurement unit 2 generates a predetermined measurement signal to be applied to the electronic component and outputs it to the measurement signal switching unit 3. In addition, the measurement signal switching unit 3 converts the +/- measurement signal input from the measurement unit 2 in the forward or reverse direction according to the information input from the PC 1 and outputs the result. The characteristic value (measurement value) of the electronic component to which the forward / reverse measurement signal is applied to both terminals is input to the PC 1 through the measurement signal switching unit 3 and the measurement unit 2, and the PC 1 is inputted. It is judged whether the electronic component is defective by comparing whether the measured value is equal to the standard value which is already set. If the measured value is different from the standard value (i.e., determined to be defective), the control signal is output to the LED driver 7 through the data input / output unit 4, and the LED driver 7 according to the input data LED ( Lights 11) to indicate defective electronic parts.

In the above, the operation of the measurement signal switching unit 3 will be described in more detail with reference to FIGS. 2 and 3 as follows.

First, the input circuit unit 20 outputs a + measurement signal to the relay 21 and outputs a-measurement signal to the relay 22 among ± measurement signals input from the measurement unit 2. In addition, the input circuit unit 20 receives a control signal from the PC 1 through the data input / output unit 4, data RM1 to RM4 to be input to the two MUXs 23 and 24, and the ± measurement signal. Outputs a signal (R17) (R18) for controlling the switching operation of the relay (21) and 22 received.

The two relays 21 to 22 respectively connected to the ± measurement signal output terminals are selectively switched by selection control signals R17 and R18 applied from the input circuit unit 20. For example, as shown in FIG. 3A, when the control signals R17 = 1 and R18 = 0 are input to the relays 21 and 22, respectively, the relay 21 has a large number of + measurement signals. The switching operation is applied so as to be applied to one end A1 to A16 of the electronic component, and the relay 22 is switched so that the -measurement signal is applied to the other end B1 to B16 of the plurality of electronic components. On the contrary, when a control signal of R17 = 0 and R18 = 1 is applied to the relays 21 and 22, the relay 21 switches so that the + measurement signal is applied to one end B1 to B16 of the electronic component to be inspected. The relay 22 performs a switching operation such that the measurement signal is applied to the other ends A1 to A16 of the electronic component to be inspected. In the above, when R17 = 1 and R18 = 0, the forward signal is applied. When R17 = 0 and R18 = 1, the reverse signal is applied.

In addition, the signals RM1 to RM4 are inputted from the input circuit unit 20, and the MUX A 23 receives a measurement signal (+ or-) applied to one end B1 to B16 of each of the plurality of inspection target electronic components. Measurements applied to the other end A1 to A16 of each of the plurality of electronic components by outputting signals RA1 to RA16 for controlling the switching operation of the plurality of relays R1 to R16 to be turned on / off. Signals RB1 to RB16 for controlling the switching operation of the plurality of relays R'1 to R'16 which conduct / block the signal (+ or-) are output. An example of a state diagram showing a state of an output value according to the input values of the two MUXs 23 and 24 is shown in FIG. A plurality of relays R1 to R16 and R'1 to R'16 provided in FIG. 2 provide signals of logic 0 (e.g., 5V or less) to respective control signal input terminals RA1 to RA16 and RB1 to RB16. When is applied, it is connected to the on-contact point so that the measurement signal is applied, and when the control signal of logic 1 (eg, 5V or more) is input, it is connected to the off-contact point to block the measurement signal. Referring to the operation of the multiple relays according to the state diagram shown in (b) of FIG. 3 as follows.

For example, when signals of RM4 = 0, RM3 = 0, RM2 = 0, and RM1 = 0 are input from the input circuit unit 20 to the MUX A, B (23,24), the MUX A, B (23,24) Outputs logic 0 to one output terminal RA1, RB1, respectively. Accordingly, among the plurality of relays RA1 to RA16 and RB1 to RB16, the relays R1 and R'1 to which logic 0 is applied to the control signal input terminal are connected to the on-contact point, and the remaining relays R2 to R16 and R 'are connected. 2 to R'16 are connected to the off contact, and apply +/- measurement signals applied from the two relays 21 and 22 at the front end to both ends A1 and B1 of one component.

The control operation of the component inspector according to the present invention will be described with reference to the flowchart of FIG.

First, when the inspection target electronic part is transferred to the inspection position (lower picture 9), the upper picture 8 is lowered so that the upper and lower pictures come into contact with the electronic part (S42). After the electronic part number COUNT is initialized to 0 (S42), 1 is added to the electronic part number COUNT (S43).

Then, it is judged whether the electronic component to be inspected (electronic component 1) is a forward electronic component (S45), and if it is a forward electronic component, 1 → R17, 0 → R18, 0000 (electronic part number COUNT-1) → RM4 , RM3, RM2, and RM1 (S46), if not a forward electronic component, 0 → R17, 1 → R18, 0000 (electronic component signal COUNT-1) → RM4, RM3, RM2, RM1 are applied (S47). . Then, the ± measurement signal is output (S48).

When the electronic component to be inspected is in the forward direction, the two relays are applied so that the + measurement signal is applied to the An stage (n: 1 to 16) and the -measurement signal is applied to the Bn stage (n: 1 to 16). 21 and 22 are selective switching operations. On the contrary, when it is not in the forward direction, the relays 21 and 22 perform selective switching so that the + measurement signal is applied to the Bn terminal and the -measurement signal is applied to the An terminal.

In this way, after the ± measurement signal is applied to the electronic component, a predetermined result such as a voltage or the like across the electronic component is measured (S49). Then, the measurement result (measurement value) is compared with the standard value stored therein (S50). If it is not the same as the standard value, it is a defective electronic component, and the LED indicating the inspected electronic component is turned on to indicate that the defective product (S51). If it is equal to the standard value, it is a good product, so it is checked whether there is an electronic component to be inspected next, that is, whether the electronic component signal COUNT is 16, and if the electronic component signal COUNT is not 16, 1 is subtracted from the electronic component signal COUNT ( S43), repeat the above operations. If the electronic component signal COUNT is 16, all the electronic components in contact with the fixture have been examined and the operation ends. As described above, a plurality of electronic components located between the upper and lower pictures 8 and 9 are sequentially inspected.

As described above, the present invention has a measurement signal switching function for applying a measurement signal output from the measurement unit 2 to the electronic component in a forward or reverse direction, thereby applying a forward measurement signal and a reverse measurement signal to an electronic component such as a diode and inspecting the result. There is an effect that can be, and there is an excellent effect that the inspection of electronic components such as the diode is easier.

Claims (3)

A component inspection apparatus for inspecting whether an electronic component is defective, the component inspection apparatus comprising: a PC for controlling the operation of each device included in the component inspection apparatus, a data input / output unit which is an interface portion for enabling data exchange between the PC and a peripheral device; A measurement unit for outputting a measurement signal to be applied to the electronic component under control of the PC, and a measurement signal output from the measurement unit in the forward or reverse direction to the component by the control signal of the PC input through the data input / output unit; A measurement signal switching unit, an LED driver for selectively turning on a plurality of LEDs according to a control signal from the PC input through the data input / output unit, and a plurality of LEDs lit by the LED driver to indicate that the electronic component is defective. Component inspection apparatus having a measurement signal switching function characterized in that provided. The control signal of claim 1, wherein the measurement signal switching unit outputs a + measurement signal input from the measurement unit to an input side of the first selection switch unit, and outputs a measurement signal to an input side of the second selection switch unit. An input circuit unit for outputting a selection control signal to the first and second selection switching units and outputting input data commonly applied to the two multiplexers, and a plurality of contact terminals contacting both lead terminals of the plurality of components at the common selection stage. The first and second selection switching units are configured to be connected in parallel, and operate in a selective switching operation according to a control signal from the input circuit unit, and a plurality of contact terminals and the first and second contacts which are in contact with both lead ends of the plurality of electronic components. A plurality of first and second switching units provided between the common selection stages of the two selection switching units and performing on / off switching operations in accordance with an input control signal, and a control signal from the input circuit unit. And first and second multiplexers for outputting signals for controlling on / off switching operations of the plurality of first and second switching units. A method for controlling a component inspection apparatus having a measurement signal switching function, the method comprising: initializing a variable value for counting the number of inspected components when a plurality of electronic components to be inspected are contacted by upper and lower pictures; Each time an inspection of a component starts, adding 1 to a variable that counts the number of inspected components, and checking data on the electronic component to be inspected, determines whether the electronic component is a forward electronic component or a reverse electronic component. In the determining step, if the electronic component in the forward direction, the measurement signal is output as it is, and if it is not the forward electronic component, controlling the polarity of the measurement signal is applied to the component and the measurement signal is applied by the step Measuring the result value from the electronic component and comparing the measured result value with a set standard value, If the result value and the standard value are the same in the step of outputting an error message, comparing the variable value for counting the inspected part with the total number of parts in contact with the upper and lower pictures, And determining if the variable value counting the number of parts is equal to the number of parts in contact with the picture, and if not equal, returning to the step of adding 1 to the variable. Control method of a component inspection device having a measurement signal switching function characterized in that.