JPH08240630A - Automatic fault-part diagnostic apparatus - Google Patents

Abstract

PURPOSE: To provide an apparatus, which can readily perform a fault diagnosis (detection of a fault part) of the circuits of various kinds of apparatuses. CONSTITUTION: A plurality of voltages and currents on the circuits of an apparatus under diagnosis 11 are measured by using measuring terminals 2. The measured values and the reference values from a reference-value generating circuit 9 are compared and operated in a fault detecting and operating part 8, and the results are displayed on a display part 10 in this constitution. In this constitution, the measurement can be performed for a plurality of determined measuring places only by connecting the measuring terminals 2, and the measured results of a plurality of the places can be displayed by one time. Therefore, the fault parts can be diagnosed simply and accurately without greatly depending on repairman's skill.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for facilitating failure diagnosis of various electric devices.

[0002]

2. Description of the Related Art A conventional device failure diagnosis is made based on individual symptoms. For example, in low-voltage circuits, voltage, current, etc. on each circuit are measured one by one, and each possible component is cut off from the circuit based on the measured values. Is very dangerous, turn off the power, disconnect each possible component from the circuit, and measure the static characteristics of each component with an inspection device. I judged the quality based on the original, replaced them and repaired them.

[0003]

However, in such a means, at the repair site of the electric equipment, it is unavoidable to judge the quality by considering mainly the static characteristics of the possible constituent parts, and the originally required dynamic characteristics are required. It is very difficult to check various characteristics, and therefore the repair time is greatly influenced by the skill level of the repairman, and it takes time to detect and judge it, and the accuracy is also poor. The present invention solves the above problems, and an object of the present invention is to provide a device that can easily and accurately diagnose a failure location regardless of the skill of a repairman.

[0004]

In order to solve the above-mentioned problems, the automatic fault location diagnosis device of the present invention has the following configuration.
That is, a measurement terminal for measuring the voltage or current at a plurality of measurement points of the device to be diagnosed, a measuring unit including a voltmeter or ammeter provided corresponding to the measurement terminal, and a reference voltage or reference current are generated. A reference value generation circuit, a failure detection calculation unit, and a display unit that displays a calculation result of the failure detection calculation unit, wherein the failure detection calculation unit is a value measured by the measurement terminal and a reference from the reference value generation circuit. The value is compared and calculated, and the failure state is diagnosed.

Further, the calculation result of the fault detection calculation section at a plurality of measurement points measured at the same time is simultaneously displayed on the display section.

Further, the display unit has a failure point display group for displaying the failure point at the component level.

Further, the measuring terminal has a high voltage probe to which at least one high voltage terminal is connected.

[0008]

According to the present invention, with the above-described configuration, the values of voltage, current, etc. at a plurality of points on the circuit of the device to be diagnosed are simultaneously measured, and these values are displayed on the device to thereby show the operating state of the device to be diagnosed. It can be visually checked whether it is normal, and if consumable parts are used in the device under test, including deterioration of the service life.

In addition, when there is an abnormality in the equipment to be diagnosed, the voltages of a plurality of points on the circuit of the equipment to be diagnosed, which are measured at the same time,
Based on the measured values of current and the like, the defective part of the device can be dug down to the component level and the defective part can be displayed by the display group provided in the device.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A case of diagnosing a failure of a high frequency heating apparatus will be described below as an embodiment of the present invention with reference to the drawings.

FIG. 3 is a perspective view of the fault location automatic diagnosis apparatus of the present invention. In the figure, a body case 1 is provided with a plurality of probes 2 for diagnosing a high frequency heating device. Of the two groups of probes, 2a represents a probe for high voltage. The measurement results are displayed on the M1 to Mn parts of the display unit 3, and the diagnosis results are displayed on the L1 to Ln parts of the display unit 3, respectively.
Reference numeral 4 is a main switch. Reference numeral 5 is an external power source, and 6 is an outlet, which is used as a power source for the device to be diagnosed.

As shown in FIGS. 1 and 2, the configuration of the present apparatus is such that the voltage and current at a plurality of measurement points A to H on the circuit of the device under diagnosis 11 are simultaneously measured and displayed independently. Measuring unit 7 including measuring instruments M1 and M2 to Mn, failure detection calculation unit 8 provided for detecting a failure point, reference value generation circuit 9 for the calculation, that is, measurement of each measurement point of the device to be diagnosed. In order to determine whether the voltage / current is normal or abnormal, the voltage and current values at each measurement point in the normal operating state of the device under diagnosis 11 are generated as reference values in this circuit in advance and the calculation results To display L1, L2, ~
The display unit 10 is made of Ln.

FIG. 2 is a schematic diagram showing a diagnosis method when a high-frequency heating device is used as the device to be diagnosed 11. Figure 2
Connect multiple probes for voltage and current measurement to each point A, B, C, D, E, F, G, H on the predetermined circuit of the high frequency heating device to be diagnosed as shown in Read at the same time. Of these, the measurement points A and B are measured at the outlet side provided inside the device, and the voltage and current consumption to be supplied to the high-frequency heating device of the device to be diagnosed 11 are also incorporated inside the device, so that they are re-examined outside. No probe connection required. As a result, the operating state of the device to be diagnosed and the degree of life deterioration of the component P9 which is a consumable component, that is, the high frequency oscillator itself can be read from M1 to Mn. Note that FIG.
Since F and G are measurements of the high voltage circuit, the high voltage probe 2a is used.

Further, as shown in FIG. 2, the voltages and currents at points A to H on the circuit of the high frequency heating apparatus to be diagnosed are measured at the same time, and the measured values are compared with each other. By comparing and contrasting, the failure state of the high frequency heating device can be dug down to the component level and judged.
Further, it is displayed on the display devices L1, L2 to Ln.

It should be noted that it is easy to understand if the display units L1, L2 to Ln are displayed by the failure name, that is, the unique name of the component parts P1 to P9.

As an example, at the measuring point H, a DC voltage having a positive potential is generated with respect to the chassis when the high frequency heating device to be diagnosed is operating normally. When the voltage of the component is also included in the measurement, it is determined that the component P7 is leaking or short-circuited, and the component name P7 is displayed on the indicators L1, L2 to Ln.
Use to display the corresponding indicator by lighting it.

Further, since the measured voltage value at the point H corresponds to the operating current of the high frequency oscillator, the operating state of the high frequency oscillator and its life deterioration state can be also determined from the measured value.
It can be read by n. For example, when the measured value reaches 80% of the rated operating current, it is possible to set the life of the high frequency oscillator, that is, the replacement time.

For example, when an AC voltage is detected between the measurement points D and E, but there is no high-voltage AC voltage at the measurement point F, the two measured values are compared, and there is between DE but between F and ground. If not, the component P5 is determined to be defective, and the corresponding component name is lit and displayed by using the indicators L1 and L2 to Ln to specifically indicate the failure location as P5.

When a high voltage is measured at the measuring point F but not detected at the measuring point G, it is determined that the component P6 is open. Furthermore, at the measurement point G, about 4 is normal
Although a negative high voltage of kV is measured, if an abnormally high voltage exceeding about 4 kV, for example, 6 kV or higher is detected and the measured value at the measurement point H is abnormally low, disconnection or failure of the high frequency oscillator P9 may occur. The corresponding component name is considered and is lit up and displayed concretely as P9 by using the indicators L1 and L2 to Ln.

[0020]

As described above, according to the present invention, the following effects can be obtained.

(1) It is possible to visually confirm the operating state of the entire device to be diagnosed. (2) The operating state of the high-frequency oscillator of the device to be diagnosed and its life can be visually confirmed.

(3) Since it is possible to automatically determine the failure location of the device to be diagnosed and specifically drill down to the individual component level and display the component name, it is easy regardless of the skill of the repairman. It is possible to provide a device that can accurately and accurately diagnose a failure location.

[Brief description of drawings]

FIG. 1 is a conceptual configuration diagram of a failure location automatic diagnosis device according to an embodiment of the present invention.

[Fig. 2] Connection diagram of the device to be diagnosed of the same automatic fault location diagnostic device

FIG. 3 is an external perspective view of the same automatic failure diagnosis device.

[Explanation of symbols]

 2 Measuring terminal 2a High-voltage probe 7 Measuring unit 8 Failure detection / calculation unit 9 Reference value generation circuit 10 Display unit 11 Diagnostic device

Claims (4)

[Claims] 1. A measuring terminal for measuring a voltage or a current at a plurality of measuring points of a device to be diagnosed, a measuring section including a voltmeter or an ammeter provided corresponding to the measuring terminal, and a reference voltage or a reference current. And a display unit that displays the calculation result of the failure detection calculation unit, wherein the failure detection calculation unit generates a reference value and a value measured by the measurement terminal. An automatic fault location diagnostic device configured to compare and calculate a reference value from a circuit to diagnose a fault condition. 2. The fault location automatic diagnosis device according to claim 1, wherein the computation results of the fault detection computation section for a plurality of measurement points measured at the same time are simultaneously displayed on the display section. 3. The failure location automatic diagnosis device according to claim 1, comprising a display section having a failure location display group for displaying failure locations at a component level. 4. The fault location automatic diagnosis device according to claim 1, 2 or 3, wherein the measurement terminal has a high-voltage probe for connecting at least one high-voltage terminal.