JPH10111151A - Measuring sequence controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of a lag by setting an execution command for a condition table at the time of starting each measuring unit and executing a measuring sequence at each measuring unit according to a trigger generated from other station after starting each measuring unit. SOLUTION: Every time when the voltage output from a measuring unit 30 is varied at a pitch of 1V between 0-10V, for example, a measuring unit 40 measures the voltage of an object 50. According to a start command from a computer 20, a control section 33 outputs 0V from a voltage output circuit 34 and delivers a trigger signal A to a communication network 10 through a communication interface 31. A control section 43 retrieves an execution command from a condition table section 42 and a voltage measuring circuit 44 measures the voltage of the object 50 and delivers a trigger signal B through a communication interface 41. The control section 33 of the measuring unit 30 retrieves an execution command from a condition table section 32 and increases the voltage of the voltage output circuit 34 by 1V and then delivers a trigger signal A again. The trigger signals A, B are exchanged between the measuring units 30, 40 and measurement proceeds autonomously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measurement sequence control device used in a measurement system or the like, and more particularly to an improvement for accurately controlling timing between a plurality of measuring instruments.

[0002]

2. Description of the Related Art A measuring system using a plurality of measuring instruments and a computer is disclosed, for example, in Japanese Patent Application Laid-Open No. Hei 5
No. 3,126,601. In this configuration, it is important to perform measurement between the measuring instruments in synchronization. For example, after applying a predetermined voltage with a voltage generator,
Conventionally, when measuring with the voltmeter DVM after waiting for 50 mS, there have been the following two methods. The first is to describe and execute a measurement procedure using a computer programming language. Second, the measuring instruments are connected by a cable, and a trigger signal output from one measuring instrument is received by the other measuring instrument to perform measurement.

[0003]

However, according to the first method, although system construction is flexible in relation to creating a program in BASIC language or C language, a delay always occurs due to the presence of a computer. . According to the second method, there is no delay, but there is a problem that complicated control cannot be performed because only one trigger signal exists in a normal measuring instrument. The present invention has solved the above-mentioned problem, and has as an arrangement capable of exchanging a plurality of trigger signals between a plurality of measuring instruments, to provide a measurement sequence control device capable of highly controlling timing between a plurality of measuring instruments. Aim.

[0004]

SUMMARY OF THE INVENTION The present invention, which achieves the above object, is a measurement sequence control apparatus having a computer 20 connected to a communication network 10 and a plurality of measuring devices 30, 40, provided in the computer. ,
A condition table setting unit 22 for setting a command to be executed when the measuring device receives a trigger signal via the communication network to each measuring device; communication interface units 31 and 41 for connecting to the communication network; Condition table sections 32 and 42 for storing commands set from the condition table setting section, and control sections 33 and 43 for searching the command table to be executed by searching the condition table section of the own station when a trigger signal is received. Signal input / output units 34 and 44 for outputting and / or inputting a signal to the measurement target 50 in accordance with the control unit; and when a predetermined trigger signal generation condition is satisfied, a trigger signal is blown to the communication network. The triggering signal generators 35 and 45 for casting, and the measuring instruments, After a measurement start command, each measuring device is characterized by executing a measurement sequence in accordance with trigger signals generated by the other stations.

According to the configuration of the present invention, when the computer starts up each measuring instrument, each measuring instrument triggers the condition table of each measuring instrument from the condition table setting section via the communication network. Set the command to be executed when a signal is received. After the start-up, when each measuring instrument receives the trigger signal, the control section searches the condition table section of its own station to check a command to be executed, and transmits a signal to the measurement target 50 via the signal input / output section. The trigger signal is transmitted and received, and the trigger signal generator broadcasts the trigger signal to the communication network. In this way, each measuring instrument can execute a measurement sequence without a computer by broadcasting the trigger signal to the communication network,
The occurrence of delay is prevented.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a configuration block diagram showing one embodiment of the present invention. In the figure, the measurement sequence control device includes a computer 20 connected to a communication network 10 and a plurality of measuring devices 30 and 40. Computer 20
It has a condition table setting unit 22 for setting a command to be executed when each of the measuring devices 30 and 40 receives a trigger signal via the communication network 10 in each measuring device.

The measuring device 30 includes a communication interface unit 31 for connecting to the communication network 10, a condition table unit 32 for storing a command set from the condition table setting unit 22, and when a trigger signal B is received, A control unit 33 for searching the condition table unit 32 of the own station for a command to be executed, a voltage output circuit 34 for outputting a voltage signal to the measurement target 50 according to the control unit 33,
When satisfying the predetermined trigger signal generation condition,
The communication network 10 has a trigger signal generator 35 for broadcasting the trigger signal A. Measurement target 5
Numeral 0 denotes commonly used electronic devices and electronic components, and various devices.

The measuring instrument 40 includes a communication interface unit 41 for connecting to the communication network 10, a condition table unit 42 for storing a command set from the condition table setting unit 22, and when a trigger signal A is received, A control unit 43 for searching a command table to be executed by searching the condition table unit 42 of the own station; a voltage measurement circuit 44 for inputting a voltage signal from a measurement target 50 according to the control unit 43; When the condition is satisfied, the communication network 10 has a trigger signal generator 45 for broadcasting the trigger signal B.

Next, the operation of the above-configured apparatus will be described. For example, consider a case where the voltage output of the measuring device 30 is changed in 1 V steps between 0 and 10 V, and the voltage of the measuring object 50 is measured by the measuring device 40 each time. At this time, when the computer 20 first instructs the measuring device 30 to start outputting, the control unit 33 of the measuring device 30 sends a 0
V and broadcast the trigger signal A to the communication network 10 via the communication interface unit 31.

On the other hand, the measuring device 40 receives the trigger signal A
Is received, the control unit 43 searches the condition table unit 42 for a command to be executed. In this example, the command of “perform voltage measurement” is set, and the voltage measurement circuit 44 measures the input voltage. Then, the trigger signal B is broadcast to the communication network 10 via the communication interface unit 41.

Then, the measuring instrument 30 receives the trigger signal B, and the control section 33 searches the condition table section 32 to check a command to be executed. In this example, “output voltage is 1V
Is increased, the output voltage of the voltage output circuit 34 is updated, and the trigger signal A is broadcast again to the communication network 10 via the communication interface unit 31. In this way, the trigger signals A and B are exchanged between the measuring device 30 and the measuring device 40, and the measurement proceeds autonomously without the intervention of the computer 20.

In the above embodiment, the combination of the voltage output circuit 34 and the voltage measurement circuit 44 is shown as the signal input / output unit. However, the present invention is not limited to this, and the combination is not limited to this. It goes without saying that various signal input / output circuits can be selected. In the above embodiment,
Although the case where only one type of trigger signal is transmitted to each measuring device has been described, the present invention is not limited to this, and sets a plurality of types of trigger signals generated or received by each measuring device. You may. In this case, by setting commands representing different operations for different types of trigger signals in the condition table, there is an effect that complicated control can be executed.

[0013]

As described above, according to the present invention, the trigger signal generated by the trigger signal generator is used to exchange the trigger signal between the measuring instruments so that the measurement proceeds autonomously. In addition, there is no possibility that a delay that occurs when the computer 20 is interposed is caused, and the timing of measurement becomes accurate.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram showing one embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 communication network 20 computer 22 condition table setting unit 30 measuring instrument 31 communication interface unit 32 condition table unit 33 control unit 34 signal input / output unit 35 trigger signal generation unit

Claims (1)

[Claims] 1. A measurement sequence control device having a computer (20) connected to a communication network (10) and a plurality of measuring devices (30, 40), wherein a measuring device provided in the computer connects the communication network. Table setting section (2) for setting a command to be executed when a trigger signal is received via the
2), a communication interface unit (31, 41) for connecting to the communication network, and a condition table unit (32, 41) for storing a command set from the condition table setting unit.
42), a control section (33, 43) for searching the condition table section of its own station for a command to be executed when a trigger signal is received, and a measurement object (5
A signal input / output unit (34, 44) for outputting or inputting a signal to the communication network (0), and a trigger signal for broadcasting the trigger signal to the communication network when a predetermined trigger signal generation condition is satisfied. A measuring unit having a generating unit (35, 45), and after receiving a measurement start command from the computer, the measuring devices execute a measurement sequence according to a trigger signal generated by another station. Characteristic measurement sequence control device.