KR100222833B1 - Method and apparatus for the test and control of wave with a function of multi model test - Google Patents

Abstract

The present invention relates to a waveform test adjusting apparatus and method having a multi-model checking function capable of inspecting multiple printed circuit boards by pin switching and fixture switching with a plurality of pictures having pins for two or more models A jig provided with a plurality of fixtures having two or more test model pins; and a control unit for controlling each device so as to detect a waveform from the printed circuit board transferred by the jig, thereby determining whether or not to adjust the detected waveform A measuring section for applying a power source and a predetermined reference signal to the jig according to an operation control signal from the PC section and detecting an operation waveform corresponding thereto; A motor unit for detecting the position of the fixture moved by the motor unit and outputting the detected position of the fixture to the PC unit, And a plurality of fixtures provided on the jig under the control of the PC unit are mounted on a printed circuit board, A programmable logic controller for controlling the conveyor drive unit to stop and drive the conveyor under the control of the PC unit and a conveyor driver for stopping and driving the conveyor under the control of the programmable logic controller do.

Description

Apparatus and method for adjusting waveform inspection with multi-model checking function

The present invention relates to a waveform test adjusting apparatus for inspecting and adjusting an output waveform of a printed circuit board having a component mounted thereon. More particularly, the present invention relates to a waveform test adjusting apparatus which includes a plurality of pins having pins for two or more models, The present invention relates to a waveform inspection adjusting apparatus and method having a multiple model checking function capable of inspecting a printed circuit board of a model.

2. Description of the Related Art Generally, a waveform inspection and adjustment apparatus applies power and a predetermined reference signal to a main board provided in an audio / video apparatus such as a TV, a VTR, or the like, on which components are mounted, An apparatus for inspecting the operation of a circuit board, wherein the detected waveform is adjusted to be a set reference waveform.

The waveform inspection and adjustment apparatus includes a fixture having a test pin formed on a printed circuit board, which is an object of inspection, to apply an appropriate signal and power to detect an operation waveform, and the position and the number of the test pin Which depends on the type of printed circuit board to be formed.

Therefore, the cost is increased because a fixture for each inspection model must be provided according to the number of inspection models.

In addition, since the conventional waveform test adjusting apparatus is provided with a fixture capable of measuring only one type of printed circuit board, if the type of the printed circuit board to be inspected is changed, it is inconvenient for a worker to manually change the fixture .

Further, every time the model of the printed circuit board to be inspected is changed, the worker must manually exchange the fixtures, so that it takes a lot of time to replace the fixtures.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method and an apparatus for mounting a fixture, The present invention has been made in view of the above problems, and it is an object of the present invention to provide a device and method for adjusting a waveform inspection having a multi-model checking function with an effect of reducing time.

FIG. 1 is a block diagram showing an overall configuration of a waveform test adjusting apparatus according to the present invention.

2 is a block diagram showing a pin switching unit according to the present invention.

FIG. 3 is a cross-sectional view showing a fixture device for multiple models according to the present invention.

FIG. 4 is a flow chart showing a waveform test adjustment method of a printed circuit board according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

11: PC section 12: power supply section

13: Signal generator 14: Trigger generator

15: analog / digital conversion unit 16: jig

17: printed circuit board (PCB) 18: pulse generator

19: motor driving part 20: adjusting motor

21: Fixture motor drive unit 22: Fixture motor

23: Sensor detection section 24 26: Sensor

27: DIO control unit 28:

29: Key box 30: Solenoid valve driving part

31 33: Cylinder 34: PLC

35: Conveyor drive

In order to accomplish the above object, the present invention provides a waveform inspection and adjustment apparatus comprising: a jig having a plurality of fixtures each having two or more inspection model pins; A power supply unit for applying a power supply and a predetermined reference signal to the jig in accordance with an operation control signal from the PC unit, A motor unit for controlling the volume adjusting terminal under the control of the PC unit and moving the fixture to an inspection position; and a controller for detecting the position of the fixture moved by the motor unit and outputting the detected position to the PC unit A pin operating section for bringing a pin corresponding to an inspection model of the printed circuit board transferred on a jig into contact with the measuring section, A fixture driving unit for raising and lowering the plurality of fixtures provided on the jig in contact with the printed circuit board under the control of the controller and a controller for controlling the conveyor driver to stop and drive the conveyor under the control of the PC unit; And a conveyor driver for stopping and driving the conveyor under the control of the programmable logic controller.

Hereinafter, the configuration and operation of the waveform check adjusting apparatus according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the overall configuration of a waveform test adjusting apparatus according to the present invention. The PC unit 11 includes a waveform checking program and controls an overall waveform checking operation. A power supply unit 12 for applying driving power to the jig 16 by an operation signal and a signal generator 13 for applying a test signal on the jig 16 according to an operation signal from the PC unit 11, A trigger generator 14 for outputting a trigger signal to be a sampling signal at the time of digital conversion by the control signal from the PC unit 11 to the analog / digital converter 15, a trigger generator 14 for generating a trigger signal from the trigger generator 15, A measurement section 36 composed of an analog / digital conversion section 15 for converting a measurement signal input from the jig 16 into a digital signal and outputting the digital signal to the PC section 11 in accordance with a signal, Get a fixture with pins A printed circuit board (PCB) 17 which is conveyed by the conveyor and positioned on the jig 16, and a printed circuit board (PCB) A pulse generator 18 for generating a PWM pulse signal that is a signal for controlling the motor speed in accordance with an operation control signal from the pulse generator 18 and a pulse signal generated by the pulse generator 18 as a control signal, A motor driving unit 19 for adjusting a rotation speed and a rotation angle of the jig 16 and an adjustment motor 20 for driving the adjustment volume provided in the jig 16 by being driven by the motor driving unit 19, A fixture motor driving unit 21 for controlling the driving direction and speed of the fixture motor 22 by using a pulse signal generated by the fixture motor driving unit 21 as a control signal, Installed fixtures to the inspection location A sensor unit 23 for detecting output signals of the plurality of sensors and detecting the sensing signals of the sensors and applying the sensed signals to the PC unit 11 and a jig 16 The PHS 1 is installed in each of a plurality of fixtures provided on the PHS 1 to detect the position of the fixture, A DIO control unit 27 for controlling data input and output under the control of the PC unit 11 and a DIO control unit 27. The DIO control unit 27 controls the position sensing unit 38, The fins are connected to the power supply unit 12, the signal generator 13, the analog / digital converter 15, and the fins of the fixture moved to the inspection position, that is, the fixture 16, And a key box 29 provided with a selection button for the fixture and pin operated by the operator and for outputting a selection signal to the PC unit 11 through the DIO control unit 27. [ A solenoid valve driving part (hereinafter, referred to as 'SQL driving part') 30 for adjusting solenoid valves for driving respective cylinders in accordance with an operation control signal of the PC part 11, It is driven up and down or right and left by adjustment and fixture attached to each Cylinder 1 that wins or descends The cylinder 3 (31 A PLC 34 for controlling the driving operation of the cone driver 35 in accordance with the motion control signal of the PC unit 11, And a conveyor driving unit 35 for driving and stopping the conveyor according to the signal.

FIG. 2 is a block diagram showing the pinhole ring portion 28 shown in FIG. 1, in which the select terminals are connected to the available two pins, which are the signals of the three fixtures, and the control signals D1 and D4 Three switches 281, 284, 287 selectively connecting one end 1 connected to the signal generator 13 to one of the two select terminals 2, 3 connected to the two test pins in accordance with D7, The selection terminals 2 and 3 are connected to the two power supply pins and one end 1 connected to the power supply unit 12 according to the control signals D2, D5, and D6 of the DIO control unit 27 is selected The three stages 283 and 288 connected to one of the stages 2 and 3 and the two stages 2 and 3 respectively connected to the two waveform detection pins formed in the three fixtures control the control of the DIO controller 27 And three switching units 283, 286 and 289 for connecting one end 1 connected to the analog / digital conversion unit 15 to one of the two selection ends 2 and 3 according to a signal In this embodiment, it is assumed that test pins for six types of models are required. It is assumed that three fixtures are provided, and that pins of two models are provided in the respective fixtures, and the number of pins Is limited to three, and the number of fixtures is limited to three, which can be variously applied, and is not necessarily limited thereto. Here, F1, F2, and F3 represent the types of fixtures, respectively, and a1 a3 and b1 b3 denotes pins for other models formed in one fixture, a1 and b1 are pins to which a test signal (reference signal) is applied, a2 and b2 are pins to which power is supplied, and a3 and b3 ms, And a pin for detecting a measurement waveform from the substrate. Therefore, Fla1 is an enable pin that is a signal of the model 1 formed in the fixture 1, Fla2 is a power supply pin of the model 1 formed in the fixture 1, and F3b3 is a measurement waveform detection pin of the model 6 formed in the fixture 3.

FIG. 3 is a cross-sectional view showing a fixture device for multiple models according to the present invention. FIG. 4 is a flowchart showing an inspection control procedure of a waveform test adjusting apparatus according to the present invention.

Hereinafter, the operation according to each of the above-described configurations will be described.

In FIG. 1, the PC unit 11 stores a program for controlling the overall flow of the waveform inspection, and controls operations of the following devices according to the program, thereby checking the waveforms detected from the PCB 17 And determines whether or not the adjustment is made.

The power supply unit 12 supplies power to the PCB 16 to be inspected and supplies power to the jig 16 in accordance with an operation signal from the PC unit 11, And is applied to the PCB 17 transferred to the inspection position through the test pins provided in the jig 16.

The signal generator 13 is a device for generating a test signal, for example, an RF signal or an audio signal, to be input to the PCB 17 to be inspected. Generates a test signal suitable for the transferred PCB model, and outputs the generated test signal to the jig 16. The output signal of the signal generator 13 is input to a predetermined input point of the PCB 17 through the jig 16. [

The trigger generating unit 14 is a device for generating a trigger signal for determining a sampling period of the analog / digital converting unit 15 under the control of the PC unit 11. The analog / digital converting unit 15 converts the jig And converts the analog waveform detected from the PCB 17, to which the power and test signals are applied, to the digital data that can be recognized by the PC unit 11. The trigger signal generator 14 generates a trigger signal Converts the analog signal input through the jig 16 into digital data, and outputs the digital data to the PC unit 11. [ The PC unit 11 compares the data input from the analog / digital converter 15 with reference data stored in an internal memory (not shown) to determine whether the volume is adjusted.

The pulse generating unit 18 is a device for generating a pulse signal for determining the rotational speed and direction of the adjusting motor 20 for operating the volume terminal and the fixture motor 22 for moving the fixtures to the left and right, Generates a PWM (Pulse Width Modulation) pulse under the control of the PC unit 11. The pulse signal output from the pulse generator 18 is input to the motor driver 19 and the fixture motor driver 21 and the motor driver 19 drives the motor driver 19 and the fixture motor driver 21, To the adjusting motor 20, and the adjusting motor 20 rotates the volume adjusting terminal (not shown) provided on the jig 16 by a predetermined angle. The fixture motor driving unit 21 controls the power supplied to the fixture motor 22 according to the pulse signal inputted from the pulse generator 18 and the fixture motor 22 rotates to move the fixture to the left and right .

The sensor detecting unit 23 detects the position of each of the fixtures moved in accordance with the driving of the fixture motor 22 and outputs the result to the PC unit 11, And the output signals of the sensors PHS1 24, PHS2 25, and PHS3 26 are checked.

The output signal from the sensor sensing unit 23 is input to the PC unit 11. The PC unit 11 confirms the position of the fixtures inputted from the sensor sensing unit 23, So that the fixture is moved to the inspection position.

The DIO control unit 27 controls data and signals input to and output from the PC unit 11. Under the control of the DIO control unit 27, the fingertip ring unit 28 performs a test on a fixture And the power supply unit 12, the signal generator 13, and the analog / digital converter 15 are connected to each other. The key box 29 is provided with a selection button for the operator to select a fixture and a test pin so that a selection signal by the operator is input to the DIO control unit 27. The DIO control unit 27 controls the key box 29 to control the operation of the fingertip exchange unit 28. [

In accordance with the control signal from the PC unit 11, the SQL driving unit 30 drives the cylinder 1 3 (31 33), characterized in that the cylinder (1) 3 (31 33 are connected to the three fixtures provided on the jig 16, respectively, to raise and lower the fixtures, respectively. The PLC 34 also controls the conveyor drive unit 35 to convey and stop the conveyor in accordance with the control command from the PC unit 11. [

In the above, the operation of the fingering ring portion 28 will be described in more detail with reference to an embodiment shown in FIG.

In the second figure, each switching unit 281 289, D9 is a control signal input from the DIO control unit 27 shown in FIG. 1, and the switching unit 281 289 are connected to one of the two selection stages (2,3). Here, test pins for six types of inspection models are provided, and the respective switching units 281 289, D9) is different. Thus, each of the switching units 281 289) receives the control signal D1 The signal generating unit 13 and the analog / digital converting unit 15 in accordance with the test patterns D9 to D9.

3, when the conveyor 161 is driven by the conveyor drive unit 35 shown in FIG. 1 to move the printed circuit board 162 to the inspection position, The fixture 163 (corresponding to the model of the printed circuit board 162 that is rotated by the motor 22 and transferred to the inspection position) 165) is moved to the inspection position. For example, if the fixture 2 (164) is a fixture having a test pin corresponding to the printed circuit board 162 transferred to the inspection position, by rotating the fixture motor 22 clockwise or counterclockwise, The ball screw 168 connected to the rotation axis of the fixture motor 22 rotates and is connected to the ball screw 168 and the three fixtures 163 165 are moved to the left and right. Then, the three fixtures 163 165 are located at the sensor PHS1 3 (24 26). That is, when the slit (SLIT) 167 formed at the center of the table 166 is placed in parallel with one of the PHSs 1 to 3 (24 to 26) 3 (24 26, a sensing signal is output from one of the three sensors PHS1 PHS3 (24 26), it is possible to find a fixture placed at the current inspection position. Therefore, the sensor, PHS1 PHS3 (24 26 and drives the fixture motor 22 so that the output signals thereof are in a predetermined combination, the specific fixture 1 3 (163 165 to the inspection position.

When the fixture having the test pin corresponding to the inspection model is placed at the inspection position, the cylinder (cylinder 1 The cylinder 3 (31 33) so that the fixture is brought into contact with the printed circuit board 162 transferred to the inspection position. Thereafter, when the waveform inspection adjustment is completed, the cylinder (cylinder 1 The cylinder 3 (31 33) to lower the fixture, and then the conveyor 161 is driven to inspect the printed circuit board 162 after the inspection.

The operation of the waveform test adjusting apparatus described above will be described with reference to the flowchart shown in FIG.

Step 401 recognizes the model of the printed circuit board transferred to the inspection position, i.e., recognizes the test pins corresponding to the printed circuit board transferred to the inspection position and the fixture equipped with the test pins. This can be entered by the operator.

In step 402, the fixture motor is rotated so that the fixture recognized in step 401 moves to the inspection position. Then, in step 403, the sensor signal for sensing the position of the fixture is checked. In step 404, it is determined whether the fixture recognized in step 401 has been moved to the inspection position. If the fixture has not yet been transferred to the inspection position, The steps 402, 403 and 404 are repeated until the fixture is moved to the position.

Thereby, if the recognized fixture is placed at the inspection position, the fixture placed at the inspection position is raised in step 405 to contact the printed circuit board.

In step 406, test pins corresponding to the model recognized in step 401 among the plurality of test pins included in the upgraded fixture in step 405 are connected to the power supply unit 12, the signal generation unit 13, and the analog / Digital converter 15, and in step 407 supplies a test signal (reference signal) and power for driving the printed circuit board to the connected test pins.

Step 408 is a step of detecting a waveform from the printed circuit board by the step 407, and determines whether the volume (measured value) measured in step 408 is equal to the reference value or not.

If it is determined in step 408 that the reference value does not match the measurement value, in step 410, the measurement direction is compared with a reference value or less to determine the adjustment direction of the volume adjustment terminal. That is, if the measured value is larger than the reference value, the adjusting motor is driven to rotate clockwise in step 411, and if the measured value is smaller than the reference value, the adjusting motor is driven to rotate counterclockwise in step 412. Then, the process returns to step 408 to detect the waveform after the adjustment, and determines whether the measured value is equal to the reference value. Thus, until the measured value and the reference value coincide with each other (i.e., until the adjustment is completed) 412 is repeated.

If it is determined that the adjustment is completed in step 413, the fixture touched on the printed circuit board is lowered in step 414, and the conveyor is driven in step 415 to take out the printed circuit board at the inspection position, Waveform inspection adjustment for the printed circuit board is completed.

As described above, the present invention has the effect of inspecting two or more models with one fixture by providing pins for two or more models in one fixture and switching pins to be connected according to the inspection model. In addition, There is an effect that multiple inspections can be performed by moving the fixture to the inspection position in accordance with the inspection model and selecting the pin to be matched with the pin by switching the pin again. Further, the fixture is manually exchanged It is possible to reduce the burden on the operator and to shorten the fixture replacement time, thereby shortening the entire waveform inspection time.

Claims (6)

A waveform inspection adjusting apparatus for inspecting an output waveform of a printed circuit board by bringing a fixture with a signal input / output pin into contact with a printed circuit board, comprising: a plurality of fixtures provided with signal input / output pins for inspecting a plurality of models of printed circuit boards A measuring unit for applying a predetermined reference signal for power supply and testing to the printed circuit board through a fixture provided on the jig and detecting an output waveform according to the predetermined reference signal; A position sensor for detecting a position of a fixture moved by driving of the motor unit; a position sensing unit for sensing a position of the fixture on the printed circuit board transferred onto the jig, To supply the detection signal applied from the measurement section to the signal input / output pin of the fixture conforming to the inspection model A PC unit for controlling each of the apparatuses to control an output waveform of the printed circuit board transferred to the upper portion of the jig and determining whether the detected waveform is adjusted by the control unit; And a fixture driver for raising and lowering a fixture corresponding to an inspection model of the printed circuit board so that the signal input / output is brought into contact with the printed circuit board. The apparatus of claim 1, wherein the motor unit comprises: a pulse generator for generating a pulse signal as a motor drive control signal under the control of the PC unit to move a fixture corresponding to an inspection model to an inspection position according to a detection result of the position sensing unit; A fixture motor driving unit for driving the fixture motor according to a pulse signal output from the pulse generator, and a fixture motor driver for driving the fixture motor according to a pulse signal output from the pulse generator. And a waveform checking and adjusting device having a function. 2. The apparatus of claim 1, wherein the position sensing unit comprises: a plurality of sensors provided on the jig for sensing a plurality of fixtures provided on the jig; and a controller for detecting a position of the fixture by combining output signals from the plurality of sensors, And a sensor detecting unit outputting the detected signal to the PC unit. [2] The apparatus of claim 1, wherein the pin operating unit includes: a key box having a fixture corresponding to an inspection model of a printed circuit board and a plurality of selection buttons for receiving selection signals of corresponding signal input / output pins; A switching unit including a plurality of switching elements for inputting a test signal output from the measuring unit to a signal input / output pin provided in each of the signal input / output pins; and a signal input / And a DIO control unit for controlling the selection operation of the switching device so as to be connected to the input / output stage. The solenoid valve according to claim 1, wherein the fixture driver comprises: a plurality of cylinders provided to raise and lower a plurality of fixtures provided on the jig; and a solenoid valve driver And a controller for controlling the plurality of waveforms. A method for adjusting waveform inspection, comprising the steps of: recognizing a fixture and a pin position according to a test model; driving a fixture motor to move a fixture recognized at the step to an inspection position; Driving the fixture motor until the fixture of the inspection model is moved to the inspection position by sensing the position of the inspection model and moving the fixture of the inspection model to the inspection position, Connecting pins of a plurality of models of pin-in-test models provided in the elevated fixture with a printed circuit board; applying power and a predetermined reference signal to the printed circuit board; Detecting an operation waveform of the circuit board and comparing whether the measured value and the reference value are the same, Comparing the magnitude of the measured value with the reference value to determine an adjustment direction; driving the motor in the direction determined in the step to adjust the waveform and then examining the waveform; And a step of lowering the fixture by completing the adjustment if the measured value and the reference value match each other, and then discharging the printed circuit board.