KR100213370B1 - Circuit function inspection apparatus with automatic inspection jig apparatus - Google Patents

Abstract

A circuit function inspection apparatus having an automatic inspection jig device, comprising: an inspection jig unit for detecting and outputting a signal from a PCB to be measured, a signal processing unit for converting a signal detected by the inspection jig unit into digital data, and an inspection jig A counter unit for counting the frequency of the detection signal output from the unit, a digital input / output unit for inputting and outputting signals for controlling the switches of the inspection jig unit, and data input from the signal processing unit and the counter unit by processing / adjusting software. And a control unit for outputting a switch control signal of the inspection jig unit according to a result to the digital input / output unit, and by automating the inspection jig unit and selecting an adjustment item through the key input unit and the display unit, detecting the signal and comparing the reference value with the reference value automatically. Display.

Description

Circuit function tester with automatic test jig

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit function inspection apparatus, and in particular, by selecting an inspection / adjustment item by key input, detecting a signal from a jig corresponding to the selected inspection / adjustment item, and processing the same by an inspection / adjustment software program. A circuit function inspection device having an automatic inspection jig device for automating adjustment.

Conventionally, in order to inspect a printed circuit board (PCB) board on which electronic components are assembled, a circuit board is inspected by manufacturing an inspection jig part which applies power to a PCB board, detects a signal, and outputs the detected signal to a measuring device. Used for.

1 is a block diagram showing the configuration of a conventional circuit function test apparatus.

The PCB jig 15 to be measured is placed on the lower jig 123 of the inspection jig part 12, and an upper jig 121 is installed on the upper part of the jig part 12 to detect a signal at the test point. The detected signals are sent to the television set 11 to inspect the screen state, and are input to the oscilloscope 13 to display the waveform of the detected signal. It is also input to the frequency counter 14, the frequency of which is counted and displayed.

While checking the state of the signals displayed in this way, the operator adjusts the test signal adjusting volume (not shown) through the manucle installed in the inspection jig unit 12 to adjust the voltage level, frequency, etc. of the signal detected by the PCB board 15. Change to adjust the state of the detection signal.

As described above, the conventional circuit function tester checks the state of the waveform using a commercial oscilloscope and frequency counter, and checks the state of the screen displayed on the television set with the operator's eyes while checking the variable volume installed in the test jig unit. Adjust to change the voltage level of the power supply or the frequency of the test signal. However, the inspection and adjustment by the operator's vision or judgment in this way uses the human's vision, so that the operator's fatigue or other psychological state caused by inspecting the television screen for a long time, or the operator who miscalculates or miscalculates the scale. The wrong measurement value may be produced due to the mistake of the human body, and the human body is fatigued by repetitive and continuous work, which is disadvantageous for a long time work, and the mistake is interrupted due to the lack of concentration due to factors such as boredom for simple work. There are many factors, and there is a difference in the degree of adjustment, which makes it difficult to ensure consistency of inspection, which causes product quality fluctuations and the adjusted values show different quality distributions for each adjuster due to differences in the judges' judgment criteria.

Therefore, the need for automation and mechanization is increasing at the production site because there are advantages such as mechanization, which can increase efficiency and productivity, and make no mistakes.

The present invention has been made by the necessity to solve the above problems, an object of the present invention is to automate the adjustment of the inspection jig portion of the circuit function inspection apparatus to secure the reliability of the inspection and adjustment, and to improve the productivity and efficiency of the circuit It is to provide an automatic jig inspection device of the functional inspection device.

In order to achieve the above object, the apparatus according to the present invention automatically selects an adjustment item through an adjustment key input unit by automating the inspection jig unit, and detects a corresponding signal to automatically compare the reference value with a reference value.

An apparatus according to the present invention includes an inspection jig unit for detecting and outputting a signal on a PCB to be measured, a signal processing unit for converting a signal detected by the inspection jig unit into digital data, and a detection signal output from the inspection jig unit. A counter unit for counting frequencies, a digital I / O unit for inputting and outputting signals for controlling switches of the inspection jig unit, and data inputted from the signal processing unit and the counter unit are processed by inspection / adjustment software and according to the result. And a control unit for outputting a switch control signal of the inspection jig unit to the digital I / O unit.

1 is a block diagram showing the configuration of a conventional circuit function test apparatus.

2 is a block diagram showing the configuration of the automatic inspection jig apparatus of the circuit function inspection apparatus according to the present invention.

3 is a block diagram of an embodiment showing a configuration with a signal processor according to the present invention.

4 is a block diagram showing the configuration of a key input and display unit according to the present invention.

* Explanation of symbols for main parts of the drawings

21: key input unit 22: main control unit

23: signal processing unit 24: digital I / O unit

25: counter portion 26: inspection jig portion

Hereinafter, the present invention will be described in detail with reference to the drawings.

2 is a block diagram showing the configuration of the automatic inspection jig apparatus of the circuit function inspection apparatus according to the present invention.

The apparatus according to the present invention includes a test jig unit 26 for detecting and outputting a signal from a PCB to be measured, a signal processor 23 for converting a detection signal output from the test jig unit 26 into digital data; A counter unit 25 for counting the frequency of the detection signal output from the test jig unit 26, a digital I / O unit 24 for inputting / outputting a signal for controlling the switches of the test jig unit 26; The data for the detection signal input from the counter section 25 and the signal processing section 23 is processed by inspection / adjustment software, and the switch control signal of the inspection jig section 26 according to the result is converted into the digital I / O section. A main control section 22 for outputting to (24), a key input and display section for outputting an adjustment item selection signal and an adjustment reference value to the main control section 22, and receiving and displaying display data from the main control section 22; It consists of 21.

3 is a block diagram of an embodiment showing the configuration of the signal processing unit according to the present invention.

The signal processor 23 according to the present invention includes a first multiplexer unit 31 which detects and outputs a signal input from the first channel and the second channel detected by the test jig unit 26, and the multiplexer unit 31. A signal data acquisition unit 32 for A / D conversion of the signal output from the signal and the signal data output from the signal data acquisition unit 32 are processed by inspection / adjustment software to obtain character data according to the result. An output signal processing control unit 32, a synchronization signal processing unit 34 for receiving the synchronization signal output from the signal data acquisition unit 32 and outputting an enable signal, and outputting the synchronization signal processing unit 34; An address counter 35 for receiving the enable signal and outputting address data, and receiving and storing character data from the signal processing controller 33 and outputting the address data from the address counter 35. A character data memory section 36 for receiving data and outputting data stored at the address; a D / A converter section 37 for outputting data output from the character data memory section 36 as an analog signal; And a second multiplexer section 38 which selects one of the first multiplexer section 31 and the D / A converter section 37 and outputs an input signal to the screen inspection television 39. Here, the television set 39 for screen inspection can use the television set 11 shown in FIG. 1 as it is.

4 is a block diagram showing the configuration of the key input and display unit.

The key input and display unit according to the present invention outputs display data and control data output from the main control unit 22, receives the inspection / adjustment item selection data, reads the inspection / adjustment item selection program, and recalls the inspection / adjustment item data. A control unit 41 for outputting to the main control unit 22, a display driver 42 for receiving display data and control data from the control unit 41 and outputting display data, and display data from the display driver 42; And a display unit 43 for receiving and displaying a switch, a switch unit 44 including a plurality of switches for selecting inspection / adjustment items, a switch for standard setting, a number input switch of 0-9, and the like, and the switch unit ( A decoder 45 for receiving and decoding the switch selection signal outputted from 44) and a program memory 46 for storing the inspection / adjustment item selection program executed by the controller 41; It is composed.

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

When an operator selects and presses one of a plurality of inspection / adjustment item selection switches included in the switch section 44, the switch is turned on and outputs an on signal to the decoder section 45. The decoder 45 decodes data corresponding to the switch in the on state and outputs the decoded data to the controller 41. The control unit 41 reads the inspection / adjustment item selection software program from the program memory unit 46 to determine the selected inspection / adjustment item, and outputs data on the selection item to the main control unit 22. In addition, the controller 41 outputs the item name data or the number data corresponding to the item determined to be selected to the display driver 42 to display the item name or number on the display unit 43.

The main controller 22 receiving the data on the selection item outputs the inspection / adjustment item selection control signal to the digital I / O unit 24. The inspection / adjustment item selection control signal outputted from the main control unit 22 is input to the inspection jig unit 26 through the digital I / O unit 24 and applied to an electric control signal such as a switch (for example, a relay or a thyristor). By turning on / off the switch) and outputs a signal detected by the jig connected to the switch to the signal processor 23 or the counter 25. The detection signal input to the signal processing unit 23 is input to the first multiplexer unit 23 through the first channel or the second channel, and then selected and output. The signal output from the multiplexer unit 31 is A / D converted by the signal data acquisition unit 32 and input to the signal processing control unit 33. The signal processing controller 33 processes the signal data output from the signal data acquisition unit 32 by inspection / adjustment software and outputs the character data according to the result to the character data memory unit 26.

In addition, the signal data acquisition unit 32 extracts a synchronization signal from the signal output from the first multiplexer unit 31 and outputs the synchronization signal to the synchronization signal processing unit 34. The synchronization signal processing unit 34 receives the synchronization signal and outputs an enable signal to the address counter 35, and the address counter 35 sequentially generates memory addresses from address 0 to the character data memory unit 36. Output The character data memory unit 36 receiving the memory address outputs the data stored at the address to the D / A converter 37. That is, the character data processed and stored by the inspection / adjustment software is output to the D / A conversion unit 37. In the character data memory unit 36, a predetermined number of memory cells, such as a video RAM, correspond to the luminance of one pixel of a television screen, and thus the luminance of data values stored in the predetermined number of memory cells (e.g., 1001 In the case of storing, when the luminance is divided into 16, the pixel corresponding to the ninth brightness is emitted to display characters on the screen as a whole.

The second multiplexer unit 38 outputs a signal detected by the jig of the inspection jig unit 26 output from the first multiplexer unit 31 to a television set or a D / A according to a control signal output from the main controller 22. The character data output from the converter 37 is output.

As described above, according to the present invention, the inspection / adjustment using the inspection / adjustment algorithm for inspecting / adjusting the circuit function of the PCB substrate in the past depending on the operator's time is more reliable than the inspection / adjustment by authorization. Accurately and quickly inspect / adjust the signal, saving time and increasing productivity.

Claims (5)

In a circuit function inspection apparatus having an automatic inspection jig device, an inspection jig unit 26 for detecting a test signal from a measurement target PCB board through a switch in which a corresponding switch for signal detection is turned on according to a switch control signal. ); A counter unit 25 for counting the frequency of the detection signal output from the inspection jig unit 26; A digital I / O unit 24 for inputting and outputting a signal for controlling switches for detecting a signal of the inspection jig unit 26; A signal processor 23 for converting the test signal detected by the test jig unit 26 into digital data; The data input from the signal processing unit 23 and the counter unit 25 is processed by the inspection / adjustment software, and the switch control signal of the inspection jig unit 26 according to the result is sent to the digital I / O unit 24. A main control unit 22 for outputting; A key input and display unit 21 for outputting an adjustment item selection signal, an adjustment reference value, etc. to the main control unit 22, and receiving and displaying display data from the main control unit 22; Circuit function inspection device having an automatic inspection jig device characterized in that it comprises a. The first multiplexer unit 31 of claim 1, wherein the signal processor 23 selects and outputs one of two signals detected by the test jig unit 26 and input from the first channel and the second channel. ; A signal data acquisition unit 33 for obtaining data by A / D conversion of the signal output from the first multiplexer unit 31; A signal processing controller 32 for processing the signal data output from the signal data acquisition unit 32 by inspection / adjustment software and outputting character data according to the result; A synchronization signal processing unit 37 for receiving a synchronization signal output from the signal data acquisition unit 32 and outputting an enable signal; An address counter 35 for receiving an enable signal output from the synchronization signal processing unit 37 and outputting address data; A character data memory unit 36 for receiving and storing character data from the signal processing control unit 33 and receiving address data output from the address counter 35 and outputting data stored at the address; A D / A converter 37 for outputting data output from the character data memory unit 36 as an analog signal; A second multiplexer unit 38 which selects one of the first multiplexer unit 31 and the D / A converter unit 37 and outputs an input signal to a screen set television set 39; Circuit function inspection apparatus having an automatic inspection jig device, characterized in that consisting of. According to claim 1, wherein the key input and display unit 21 outputs the display data and control data output from the main control unit 22, and receives the inspection / adjustment item selection data to read the inspection / adjustment item selection program A control unit 41 for outputting inspection / adjustment item data to the main control unit 22; A display driver 42 receiving the display data and the control data from the controller 41 and outputting the display data; A display unit 43 for receiving and displaying display data from the display driver 42; A switch unit 44 including a plurality of switches for selecting inspection / adjustment items, a switch for setting standards, and a number input switch up to 0-9; A decoder unit 45 which receives a switch selection signal output from the switch unit 44 and decodes the same; A program memory section 46 for storing an inspection / adjustment item selection program executed by the controller 41; Circuit function inspection apparatus having an automatic inspection jig device, characterized in that consisting of. 4. The main control unit 22 according to claim 1 or 3, wherein the main control unit 22 receives the data for the selection item from the control unit 41 of the key input and display unit 21 and receives the test / adjustment item selection control signal. Outputting to the test jig unit 26 through the / O unit 24 to turn on the corresponding switch to output a signal detected by the jig connected to the switch to the signal processing unit 23 or the counter unit 25. A circuit function inspection device comprising an automatic inspection jig device. 3. The circuit according to claim 2, wherein the character data memory section (36) has a data value stored in the predetermined number of memory cells corresponding to the luminance of one pixel of the television screen. Functional inspection device.