JPS58191974A - Network testing machine - Google Patents

Abstract

PURPOSE:To test always correctly a network to be tested, by comparing and collating the voltage measurement result of each measuring terminal with preliminarily stored terminal voltage data of every network to be tested to retrieve the type or the like of the network to be tested. CONSTITUTION:Terminals 111-11n of a network 10 to be tested are inserted to measuring terminals 61-6n, and the start switch of a CPU2 is turned on. The CPU2 controls a driver 15 to operate relays RL01-RL0n successively to cause a digital voltmeter 13 to measure voltages of measuring terminals 61-6n successively through a switching circuit 12, and results are sent to the CPU2 through a buffer memory 14. They are compared and collated with data of combinations of voltage values of every network stored in a memory 1 to retrieve the type or the like of the network 10 connected to measuring terminals. The CPU2 reads out information of the classification of each terminal of the pertinent network 10 in accordance with the retrieval result and controls a driver 7 to perform connections in a connecting circuit 5 similarly to a conventional case. Hereafter, the testing operation of the network 10 is performed similarly to the conventional case.

Description

DETAILED DESCRIPTION OF THE INVENTION Related to a searchable circuit network testing machine 1 Figure 1 shows a schematic configuration of a conventional circuit network testing machine. A central processing unit that controls each circuit according to the truth table for each test circuit network, a memory that stores information on the type of each terminal such as input/output, etc. 2 is a profurano in memory 1 (CPU)3
4 is a register that temporarily stores the test signal sent to the circuit under test, 4 is a scanner that reads the output + bow of the circuit under test, and 5 is a connection that selectively connects the register 3 and scanner 4 to a plurality of measurement terminals. ] 11th route, 6-1.6-2...5
- n is a removable measurement terminal, 7 is multiple relays R
LI 1, RLI 2.

RL2 1, RL22...RLn 1, RLr+2
driver, 8-1.8-2 ・8-m is a telephone key for specifying the type, product name, model number, etc. (hereinafter, 4i is only written as type, etc.) of the circuit network under test, 9 is electric key 8-
1. 8-2. Converter 1 for converting the designation of the circuit network under test by 8-m into a take signal adapted to the CPU 2;
'0 is an electronic circuit package, IC mounted package, IC
Circuit network under test such as 11-1.11-2...11-n
are signal input/output terminals of the circuit network under test 10,
, the connection circuit 5 is a gate circuit 5a-11, 5a-215a that is designed to send the signal of the register 3 only in the direction of the measurement terminal.
'-nl and a gate circuit 5a-12゜5a-22 for sending the signal from the measurement terminal only in the direction of the scanner 4.
5a-n2 and relays RLII and RL2 for connecting each measurement terminal and resistor 3]-RL n 1 contact 5
b-11,51)-21-5b-nl and a relay RL12 for connecting each measurement terminal and the scanner 4. RL2
2-RLn2 contact 5 b-12゜5b-22...5
It consists of bn2.

Next, to operate the above device, first connect the defining terminal 6-1 +'
6-22 = 6-n K terminal 1 of circuit network under test 10
Insert 1-1, 11-2...11-n, and press key 8-1.
．． 8-2:・Circuit network 1 by manually operating F3-m
Specify the type of 0. The CPU 2 reads information on each type of wire in the corresponding circuit network 10 from the memory 1, and sets the input terminal and register 3 to 1, the output terminal and scanner 4
For example, the end 11-1 of the circuit network 10 shown in the figure is for input, and the end 11-1 is for input, and 11-n is for output, so relay RLII
and RL n 2 operate, child contacts 5b-11 and 5
b-n2 is closed, and connection loops between the register 3 and the terminal 11-1, and between the scanner 4 and the terminal 11-n are formed.

When the connection operation in the connection circuit 5 is completed, the CPU 2 sends a test signal (Qv, a signal at a logic level of 5v) from the register 3 to each input of the circuit network 10 according to the truth table of the circuit network 10 read from the memory 1. 1. As a result of the test, the circuit network 0 is normal. If there is, the CPU 2 displays this on a display section (not shown), and similarly displays this in case of an abnormality (failure).

By the way, the internal configuration of the circuit network under test 10 is completely different depending on its type, and the type of each terminal (A) for input or output is also completely different. Therefore, if you make a mistake in operating the keys B-1, 8-2, . The purpose of the present invention is to solve these problems. In order to eliminate defects, a means for measuring the voltage at each measuring terminal was used, and the results were compared with pre-stored data on the terminal voltage for each circuit under test, and the voltage was connected to the measuring terminal 7. The device is equipped with means for searching for the type of circuit network under test, etc., and will be described in detail below with reference to the drawings.

FIG. 2 shows an embodiment of the present invention, in which the same components as those in FIG. 1 are denoted by the same reference numerals. νIJchi, 1
is memory, 2 is CPU, 3 is register, 4 is scanner,
5 is the connection circuit, 6-1゜6-2-6-n is the measurement end go, 7
is the driver, RLI 1° RLI 2. RL21.
RL22-RLn l, RLn 2 is a relay, 10 is a circuit under test, 11-1, 11-2... ] 1-n is an end of the circuit network 10, 12 is a switching circuit, 13 is a digital voltmeter, 14 is a buffer memory 15 is a second driver (hereinafter simply referred to as driver 15), RLO1, R
LO2-RLOn are relays.

The switching circuit 12 has fixed ends 6-1, 6-2...6-n.
It is for connecting each terminal of 1:3 to a digital voltmeter, and has relay RLO], RL02=RLOn switching contact 12-], l2-2-12-n, and normally each measuring terminal is Connect A to connection circuit 5, and connect each relay RLO
l, RLO2 = [When LOn operates, measurement terminal 6-
1.6-2...5-n is digital voltmeter 13
They are connected to each other. The digital voltmeter 13 converts the detected voltage into a digital value and outputs it.・〈〉memory 14 is provided with a storage area corresponding to the number of measurement ends. In addition to the above-mentioned contents, the memory 1 stores the voltage value of each terminal corresponding to each circuit network under test in the state (power is on). As mentioned above, the internal configuration and type of each terminal of the circuit network under test differ depending on its type, so the combination of voltage values at each terminal of each circuit network under test is unique depending on the type. There is,
.

Next, to operate the above device, 1.
-2-6-n is the end of the circuit network under test 10 11-1.1l
-2-11-n, and turn on the starting switch of CPU2 (not shown). CP ti 2 is driver 15
Control relays RLOI, R, LO2...RLOn
are operated in sequence, and the voltages at the measuring terminals 6-1, 6-2, and 5h connected to the circuit network 10 are sequentially measured by the digital voltmeter via the switching circuit 12. The measurement results are sent to the CPU 2 via the buffer memory 14.
The PU 2 compares and collates the measurement result with a take of combinations of voltage values for each circuit network stored in the memory 1, and searches for the type of the circuit network 10 connected to the measurement terminal A.

Historically, CPtJ2 is the corresponding circuit network 1 according to the search results.
0 is read out, and the driver 7 is controlled to make the connection in the connection circuit 5 in the same manner as in the conventional example.Hereinafter, the test operation of the circuit network 10 is the same as in the conventional example. Therefore, it is omitted.

Note that when searching for the type of circuit network, etc., if there is no matching network, a message to that effect may be displayed. In the above embodiment, it is assumed that power is supplied to the circuit network under test at the same time as the circuit network is attached to the measurement terminal.

As explained above, according to the present invention, there is provided a means for measuring the voltage at each measurement terminal A, a means for measuring the voltage at each measurement terminal A, and a means for comparing and collating the voltage measurement result with a pre-stored take of the terminal voltage for each circuit network under test. Since it is equipped with a means to search for the type of circuit network under test, etc., there is no error in specifying the type of circuit network under test due to human error as in the past, and the correct circuit network under test can always be tested. There are advantages such as there is no risk of destroying the circuit network under test or the test equipment itself.

[Brief explanation of the drawing]

The drawings serve to explain the present invention, and FIG. 1 is a block diagram showing an example of a conventional circuit network tester, and FIG. 2 is a block diagram showing an embodiment of the circuit network tester of the present invention. 1...Memory, 2...CPU, 3...Register, 4...
・Scanner, 5・Connection circuit, 6...Measurement end A, 7, 15
... Driver, 10... Circuit network under test, 11-1.11
-2...11-n...Ends 7, 12 of the circuit network under test 10
...Switching circuit, 13. Digital voltmeter,
1 4... Buffer memory, RLI 1, RLI 2
. RL21, RL22・=RLnl, RLn2, RLOI
,R1,02...RLOn...Re-shi. Patent applicant: Oki Electric Industry Co., Ltd. Patent attorney Yoshi 1) Takashi Sei Figure 1

Claims (1)

[Claims] A circuit that performs tests by selectively connecting a register that temporarily stores the test signal sent to the circuit network under test and a scanner that reads the output signal of the circuit network under test to multiple measurement terminals according to the type of the circuit network under test. In the network testing machine, a means for measuring the voltage of each of the measurement terminals mentioned above, and a circuit under test connected to the measurement terminals for comparison and comparison with the terminal voltage of each circuit network under test in which the voltage measurement results are stored in advance. A circuit network testing machine characterized by comprising means for searching for network types, etc.