KR20010066645A - Voltage Control Unit of Printed Circuit Board and Method - Google Patents

Abstract

PURPOSE: A power source control device of plate examination equipment and a method the same are provided to perform automatically control of power source and examination by detecting whether or not plate to examine is settled and plate ID(identity) in examination equipment which examines several types of plate using power source of multi kinds. CONSTITUTION: A computer(10) inspects a system of a device for equipment examination on the whole. An input/output unit(20) inputs a command at the computer(10) and displays the result. A plate to examine(30) transmits or receives system data according to the control of the computer(10) and enables examination of examination items. An input/output signal transmission(40) and signal distribution circuit unit(50) transmits or receives a signal between the computer(10) and the plate to examine(30). An ID acquisition and power source control unit(70) detects whether or not the plate to examine(30) is settled and acquires a plate ID and controls power source automatically by use of a relay. A power source condition display unit(80) acquires directly all power source permitted at the plate to examine(30) in the relay and displays that to an operator.

Description

Power control device and method of board inspection equipment {Voltage Control Unit of Printed Circuit Board and Method}

The present invention relates to a power supply control device and method of a board inspection equipment, and in particular, in inspection equipment for inspecting various types of substrates using a variety of power sources, by detecting whether the inspection target board is mounted and the board name, the power supply and inspection It relates to a power supply control apparatus and method for a substrate inspection equipment, characterized in that to implement the inspection equipment to perform the control automatically.

In the conventional inspection equipment, after the board to be inspected is mounted, power is supplied to the inspection board with a power switch, and the inspection is performed. After the inspection is completed, the inspection is turned off and the inspection board is removed.

That is, conventionally, as shown in Figure 1, the computer 10 for inspecting the overall system of the apparatus for checking the equipment;

An input / output unit 20 for inputting a command to the computer 10 and displaying a result thereof;

An inspection target board 30 for transmitting and receiving system data under the control of the computer 10 to check an inspection item;

An input / output signal transmission 40 and a signal distribution circuit unit 50 for transmitting a signal between the computer 10 and the inspection target substrate 30;

The external power control switch 60 determines the power to be provided to the inspection target substrate 30.

And, looking at the operation state, as shown in Figure 2,

A first step (A1) of mounting the check counter plate;

A second step A2 of applying power using a power switch;

Performing a check function and displaying a result thereof;

A fourth step (A4) of shutting off power using a power switch;

A fifth step A5 was performed to remove the inspection target substrate.

However, at this time, when mounting and removing the substrate 30 to be checked, the power switch 60 must be turned off and the power switch 60 must be placed as many as the number of powers applied to the substrate 30. .

That is, in the conventional inspection apparatus, if the board is mounted or removed without the power switch being turned off by an operator's mistake, the inspection equipment for the board requiring multiple power sources may be damaged. The number of power switches increases, resulting in excessive cost and inconvenience of operation.

The present invention is to solve the above problems,

The purpose of this is to realize the inspection equipment that performs inspection and inspection control automatically by using a relay by acquiring whether the inspection target board is installed and the board name.

As a means for achieving the above object,

The present invention first acquires whether or not the mounting board and the board name of the ID acquisition and power control unit to automatically control the power using the relay, and the power state to directly obtain all the power applied to the inspection board from the relay to the operator It is characterized by the configuration including an exhibition.

1 is a block diagram of the substrate inspection equipment of the present invention.

2 is a flow chart of the inspection procedure of the present invention.

3 is a block diagram of a prior art board inspection equipment.

4 is a flow chart of the inspection procedure of the prior art.

5 is a detailed circuit diagram of an ID acquisition and a power supply control unit.

6 is a detailed circuit diagram of a power state display unit;

Explanation of symbols on the main parts of the drawings

10: computer 20: data input / output unit

30: check target substrate 40: input and output signal generation unit

50: signal distribution circuit 70: ID acquisition and power control unit

80: power status indicator

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

3 is a block diagram of the present invention,

A computer 10 for inspecting the overall system of the apparatus for checking the equipment;

An input / output unit 20 for inputting a command to the computer 10 and displaying a result thereof;

A check counter board 30 for transmitting and receiving system data under the control of the computer 10 to check the check items;

An input-output signal transmission 40 and a signal distribution circuit unit 50 for transmitting a signal between the computer 10 and the check counter plate 30;

An ID acquisition and power control unit 70 for automatically controlling power using a relay by acquiring whether the inspection target board 30 is mounted and the board name;

Characterized in that it comprises a power state display unit 80 to obtain all the power applied to the inspection target board 30 directly from the relay to the operator.

The present invention configured as described above will be described in more detail as follows.

First of all, all boards to be checked have a board ID function by connecting some of the common spare pins that are not used when manufacturing the board to GND or NC (unconnected).

For example, if there are seven types of boards 30 to be checked, each of the three spare pins of the same number of each board is set to GND or NC (No connection) to have respective IDs.

(Board ID setting example)

Board Name Slack Pin ID value ID0 ID1 ID2 A1 substrate GND GND GND 000 A2 substrate GND GND NC 001 A3 substrate GND NC GND 010 A4 substrate GND NC NC 011 A5 substrate NC GND GND 100 A6 substrate NC GND NC 101 A7 substrate NC NC GND 110 Unmounted NC NC NC 111

When the substrate ID is determined as described above, the operator mounts the inspection board and executes the inspection menu, and the inspection equipment first obtains the ID of the substrate and checks whether the substrate to be checked matches before executing the substrate inspection command.

If the IDs match, the power is supplied from the ID acquisition and power control unit 70, and the inspection is performed, and the power is automatically turned off at the end. In the case of ID mismatch, checks are made with a procedure to show the operator that the wrong board is installed.

First, in FIG. 5, the ID of the board mounted through the ID0, ID1, and ID2 pins connected to U1 (54ASL574) is obtained. At this time, U1 is connected to 8 and 9 to GND to have a self-checking function of U1.

And if the obtained ID value matches with the board to be checked and compares, the relay is turned on with U2 (54ASL574) and the relay driver IC U3 (SG2003) to apply power to the board 30 and perform the inspection. When this is finished, the relay is automatically turned off to cut off the power.

Then, the power is automatically controlled by the ID acquisition and power control unit 70, but there is no possibility that the power is incorrectly applied or cut off due to a program error or a relay failure. This is necessary for the naked eye to check whether the power is completely cut off when the operator installs or removes the board.

In the present invention, when all the outputs of the relay applied to the substrate is turned on using any one of the optocoupler (Optocoupler, U1, U2), the power lamp (power status indicator, 80) is turned on and the operator mounts or removes the substrate. To prevent damage to the substrate 30.

In FIG. 6, each input of the optocouplers U1 and U2 is connected to a relay output voltage line to detect whether power is applied.

If power is applied, the optocouplers U1 and U2 are turned on, and their outputs are input to the comparator U3 so that the LEDs are turned on to inform the user that power is currently applied to the substrate.

In particular, in the present invention, optocouplers (U1, U2) are resistant to noise and have a logic sum (OR) function that can be detected when any one of a plurality of power supplies is turned on to insulate an AC or high voltage. The GND terminal of U3 was connected to the input of the comparator U3.

For example, if + 15V is applied, current flows from A2 to C2 of U1. At this time, 6 of U1 is turned on, and 5V is pulled through GND pin 5 through 5 pull-up resistor 4.7K. Is entered at a time.

At this time, the comparator U3 is turned on and the LED is turned on because the voltage of the comparator U3 is higher than 2.5V.

In addition, in the present invention, it is possible to detect all kinds of power by using a simple rectifier circuit to detect the AC input power.

4 is an operation state diagram of the present invention,

A first step (S1) of mounting the check counter plate;

A second step S2 of obtaining a substrate ID;

A third step S3 of determining whether the substrate IDs match;

A fourth step S4 of displaying power supply control and checking function performance and results if the IDs match in the third step S3;

A fifth step (S5) of displaying an error message if the IDs do not match in the third step;

A sixth step S6 of removing the inspection target substrate is performed.

As described above, the present invention implements quick and safe substrate maintenance, increases the convenience of operation by removing unnecessary power switches, and provides an effect of increasing stability of the inspection target substrate by displaying power states.

Claims (2)

A computer 10 for inspecting the overall system of the apparatus for checking the equipment; An input / output unit 20 for inputting a command to the computer 10 and displaying a result thereof; A check counter board 30 for transmitting and receiving system data under the control of the computer 10 to check the check items; An input-output signal transmission 40 and a signal distribution circuit unit 50 for transmitting a signal between the computer 10 and the check counter plate 30; An ID acquisition and power control unit 70 for automatically controlling power using a relay by acquiring whether the inspection target board 30 is mounted and the board name; Power control device for a board inspection equipment, characterized in that it comprises a power status display unit 80 to obtain all the power applied to the inspection target substrate 30 directly from the relay to the operator. A first step (S1) of mounting the check counter plate; A second step S2 of obtaining a substrate ID; A third step S3 of determining whether the substrate IDs match; A fourth step S4 of displaying power supply control and checking function performance and results if the IDs match in the third step S3; A fifth step (S5) of displaying an error message if the IDs do not match in the third step; The power control method of the substrate inspection equipment comprising a sixth step (S6) of removing the inspection target substrate to proceed sequentially.