JPS6058562A - Measuring apparatus of electrical equipment - Google Patents

Abstract

PURPOSE:To make it possible to perform stable measurement without performing oscillation in any state by preventing a route from being brought to a closed loop electrically, by providing an optical fiber transmitting receiving apparatus between control bus lines. CONSTITUTION:A optical fiber transmitting receiving apparatus 7 is constituted so as to once substitute an electric signal with an optical signal and, thereafter, return said optical signal to the electric signal. When this optical fiber transmitting and receiving apparatus is used, the command generated from a computer 1 is sent to the optical fiber transmitting receiving apparatus 7 through a control bus line 6 at first. Herein, the electric signal is once converted to an optical signal which is, in turn, again returned to the electric signal while this electric signal is sent to a high frequency signal generator 2.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a 611] measurement device used for measuring high frequency interference exerted on electrical equipment.

Conventional configurations and their problems In recent years, the harm caused by high-frequency V noise to electrical equipment has come under close scrutiny as it relates to industrial environment problems. Particularly in West Germany, high frequency interference regulation 171 (FTZ standard) was implemented by law two years ago, and all electrical equipment exported to West Germany must meet the FTZ standard.

Conventionally, measurements according to the FTZ standard have been carried out as shown in FIG. In FIG. 1, a computer 1 controls a voltmeter 4 and a high frequency signal generator 2, which will be described later.

Reference numeral 2 denotes a high frequency generator No. 11, which generates a measurement signal. 3 is a supply device, and 6 (11) is an electrical device that is regulated. 4 is a voltmeter that measures the level of the signal generated from the device under test 3.
jlJ is determined.

5 is a signal line, which is a line through which a measurement signal flows. 6
is the control path line with high frequency A, No. 1 generator 2, and voltmeter 4.
This is the line that controls the

The operation of the conventional measuring device configured as described above will be explained below.

First, a command generated from the computer 1 according to the measurement program operates the high frequency signal generator 2 via the control path line 6 to generate a signal for running the machine. The measurement signal is sent to the device under test 3 via the signal line 5.
added to. The signal generated from the device under test 3 is measured by a voltmeter 4. Data measured by the voltmeter is sent to the computer 1 via the control path line 6, and the data is stored in the computer 1.

However, in the above configuration, since the control path line 6 and the signal line 5 are grounded in common inside the high frequency signal generator 2, the ground between the control path line 6, the signal line 5, and the high frequency signal generator 2 is There was a problem in that oscillation occurred, making measurement impossible and resulting in failure.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned problems of the conventional technology, and provides stable I'f! without oscillation under any conditions. The purpose of this invention is to provide a device for determining the 611] value.

Structure of the Invention The present invention prevents oscillation by installing an optical fiber transmitting/receiving device in the control path line of a conventional measuring device to make the path electrically open loop.

DESCRIPTION OF THE EMBODIMENT FIG. 2 shows the configuration of an embodiment of the present invention. The names and functions of 1 to 6 in FIG. 2 are the same as in FIG. 1, so their explanations will be omitted. 7 in FIG. 2 is an optical fiber transmitting/receiving device. This temporarily replaces the electrical signal with an optical signal,
After that, I was faced with the problem of electricity again.

The operation when using this optical fiber transmitting/receiving device will be explained below. First, commands generated from the computer 1 are sent to the optical fiber transceiver device 2 via the control path line 6.
sent to. Here, the signal 1 is once converted from electricity to light and then turned into an electric signal again and sent to the high frequency signal generator 2. The following movement ('+ is the same as the conventional example explained in FIG. 1, so it will be omitted.

Effects of the Invention As described above, the present invention prevents the path from becoming an electrically closed loop by providing an optical fiber transmitting/receiving device between the control path lines. Even if the control path line and the signal line are grounded in common, oscillation does not occur, and the needle side is stable under any conditions.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional n10 determination device, and FIG. 2 is a block diagram of a measuring device in an embodiment of the present invention. 1... Computer, 2... High frequency signal generator, 3... Equipment under test, 4... Voltmeter, 5... Signal Line, 6... Control Hass Line, 7 Old... Optical fiber transmitter/receiver. Name of agent: Patent attorney Toshio Nakao Heka No. 1
Figure 2

Claims (1)

[Claims] Commands from the computer are supplied to a high-frequency signal generator via a control path line, a high-frequency signal for measurement from this high-frequency signal generator is supplied to the EUT, and the output of this EUT is used for measurement with a voltmeter, etc. The device is configured to transmit the 41υ constant result from this 611j constant device to the computer via the control path line. A measuring device for electrical equipment, characterized in that it is equipped with an optical fiber transmitting/receiving device for converting into signals.