JPH07302114A - Abnormality detecting device - Google Patents

Abstract

PURPOSE:To provide an abnormality detecting device which can detect whether a specific load is abnormal or not. CONSTITUTION:An abnormality detecting device contains a load driving means and a load control means 2 which instructs an operation to the load driving means. Then the detecting device is also provided with a voltage detector means 20 which detects the information applied to the load, a current detector means 30 which detects the information on the current flowing to the load, and a timer means 5 which counts a prescribed time after the means 2 instructs the load operation. Furthermore an abnormality deciding means 3 is added to decide the abnormality according to a fact whether both means 20 and 30 detect, the information on the voltage and the current corresponding to the load operation before the timer 5 counts a prescribed time, together with an abnormality display means 40 which shows the abnormality decided by the means 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality detecting device for detecting an abnormality relating to a load such as an igniter.

[0002]

2. Description of the Related Art Conventionally, as this type of abnormality detecting device,
For example, there is an abnormality detecting device for a water heater, and there is one that displays the type of abnormality with an error code when an abnormality occurs and informs the content of the abnormality at the time of repair. For example, "error 001" is displayed when there is a flame non-detection error, and "error 002" is displayed when there is a fan motor error.

[0003]

However, although there is such a device in the related art, the conventional device displays the type of abnormality, and it is still troublesome to specify which component is abnormal. There was a problem that it took time to repair. For example, when the flame non-detection error is "Error 001", whether the ignition of the igniter is abnormal, the gas solenoid valve is abnormal, or the temperature fuse is abnormal,
Since the type of error does not match the specific part,
It is necessary to look at the error code and identify which part of the parts related to the error code is abnormal, and it takes time and labor for the repair, and a considerable amount of expert knowledge about the repair is required. I had a problem.

Therefore, an object of the present invention is to provide an abnormality detecting device for detecting whether the specific load is normal or abnormal by monitoring the voltage and current of the specific load.

[0005]

In order to achieve the above object, the invention according to claim 1 provides a voltage detection circuit for detecting information on a voltage applied to the load during operation of the load, and information on a current flowing through the load. A current detection circuit to detect, an abnormality determination means for determining an abnormality of the load based on the information about the voltage detected by the voltage detection circuit and the information about the current detected by the current detection circuit, and the abnormality determination means determines that the abnormality When it does, it is characterized by comprising a display means for displaying an abnormality.

According to a second aspect of the present invention, a load driving means for driving a load and a load control means for instructing the load driving means to operate are provided, and an abnormality detection for detecting an abnormality of the load is provided. In the apparatus, a voltage detection unit that detects information about a voltage applied to a load, a current detection unit that detects information about a current flowing through the load, and a timer that measures a predetermined time after the load control unit instructs the operation of the load. Means and an abnormality determining means for determining an abnormality based on whether or not the voltage detecting means and the current detecting means have detected information on voltage and current corresponding to the operation of the load before the timer means measures a predetermined time. And a display means for displaying the abnormality when the abnormality determining means determines that the abnormality is present.

[0007]

According to the abnormality detecting device of the present invention, the voltage detecting means for detecting the voltage applied to the load and the current detecting means for detecting the current flowing through the load are provided, and the voltage and the current of the load are detected during the operation of the load. The abnormality is determined by monitoring and whether or not the load itself is abnormal, and the abnormality display means displays the abnormality when the abnormality occurs.

Further, timer means for starting timekeeping corresponding to the operation of the load is further provided, and a change in voltage or current corresponding to the operation of the load is detected until a predetermined time is counted to determine whether or not there is an abnormality. Make quick decisions.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention. In FIG. 1, 1 is a control unit, 6 is a load, 1
Reference numeral 0 is a drive means, 20 is a voltage detection means, 30 is a current detection means, and 40 is a display means. The drive unit 10 drives the load 6 according to an instruction from the control unit 1, the voltage detection unit 20 and the current detection unit 30 monitor the state of the load 6, and the detected contents are input to the control unit 1. Then, the control unit 1 determines whether or not there is an abnormality in the load 6 based on the detected content, and if an abnormality has occurred, the abnormality is displayed on the display means 40.

Next, each component will be described in detail. The control unit 1 has a load control unit 2, an abnormality determination unit 3, a display control unit 4, and a timer unit 5, and also has two output ports and two input ports.

The load control means 2 is means for instructing control of the operation of the load 6, and outputs a high signal from the first output port to drive the drive means 10 during operation. The abnormality determining means 3 is means for determining whether the load is normal or abnormal based on the detection information input from the first input port and the second input port. The display control unit 4 is a unit that controls the display of the display unit 40, and outputs a high signal from the second output port when displaying.

The timer means 5 is a means which operates when the load control means 2 instructs the drive means 10 to drive, and measures a fixed time.

The load 6 is applied in the case of a load such as an igniter, a valve and a motor. In the present embodiment, in order to describe more specifically, the case where the load 6 is an igniter will be described below. In the case of an igniter, this device is an abnormality detection device for a load control device such as used as an ignition device for a combustion device.

As shown in FIG. 1, the driving means 10 is composed of a transistor 11, a relay 12 and the like. When the load is activated, the output of the first output port is made high, and the transistor 11 is turned on.
Is turned on and the relay 12 becomes conductive. As a result, the relay contact 13 is turned on, the AC power supply 7 is applied to the load 6, and the igniter, which is the load, performs the ignition operation. When not operating, the output of the first output port is set to low, the transistor 11 is turned off, the relay 12 is turned off, and the relay contact 13
Is open.

The voltage detecting means 20 is composed of a resistor 22, a photocoupler 21, etc., and detects the voltage applied to the load 6. When a voltage is applied to the load 6, a current flows to the photodiode side of the photocoupler 21, the transistor side is turned on, and the low signal is input to the first input port of the control unit 1. When no voltage is applied to the load 6, no current flows to the photodiode side of the photocoupler 21, the transistor side is off, and a high signal is input to the first input port of the control unit 1.

The current detecting means 30 is composed of a photocoupler 31, a resistor 32 and the like, and when a current flows through the load 6, the resistor 32 is provided.
A voltage is generated in the photocoupler, a current flows through the photodiode side of the photocoupler 31, the phototransistor side is turned on, and the second side of the controller 1 is turned on.
Input a low signal to the input port. If no current flows through the load, a high signal is input to the second input port.

The display means 40 is composed of a transistor 42, a light emitting LED 43 and the like. When an abnormality occurs, the display control means 4 outputs a high signal from the second output port, the transistor 42 is turned on and the light emitting LED 43 is turned on. Light. In a normal state, a low signal is output from the second output port, so that the transistor 42 is turned off and the light emitting LED 43 is not turned on.

Next, with reference to FIGS. 2 and 3, a description will be given of the operation of detecting an abnormality during the operation of the load. FIG. 2 is a flowchart showing the operation.

As shown in FIG. 2, the load control means 2 has a first
When the output of the output port is set to high and the relay contact 13 is turned on and the ignition of the igniter 6 is instructed (step S1), the timer means 5 measures the time and judges whether it is within 1 second (step S2). If it is within 1 second, the signal of the second input port which is the input port of the detection output of the current detection means 60 is monitored, and as shown in FIG. 3, it is checked whether or not there is a falling edge of a predetermined voltage or more. Judge (step S
3). When the falling edge detects a change of a predetermined voltage or more, the ignition operation is normally performed, so that the content of the timer means 5 is cleared to confirm the next ignition operation, and the timing is newly started (step S4, S5), returning to step S1, the above-mentioned operation is repeated.

If the trailing edge cannot be confirmed in step S3, the change in current due to the ignition operation cannot be detected, and the procedure returns to step S1 to confirm the change for 1 second, and the confirming operation is repeated. If it cannot be confirmed in step S2 for 1 second, the abnormality determination means 3 can determine that the load is abnormal and confirm that the ignition operation is not performed despite the ignition instruction (step S7).

Although not shown in FIG. 2, the voltage detecting means 2
The detection output of 0 is also input to the first input port to check the voltage applied to the load 6. If the voltage cannot be detected regardless of the operation instruction of the load, the abnormality determining means 3
Is judged to be abnormal. If judged to be abnormal, the display control means 4
Causes the output of the second output port to go high and displays an error.

Next, another embodiment will be described with reference to FIG. 4. The same components as those in FIG. 1 are designated by the same reference numerals. The control unit 1, the drive unit 10, and the display unit 40 are the same, but the voltage detection unit 50 and the current detection unit 60 are different. The voltage detecting means 50 and the current detecting means 60 have diodes 52 and 62 for rectification, respectively, and a photocoupler 51 and
Capacitors 53 and 63 are provided in parallel with the photodiode 61. As a result, the voltage and current can be detected only with respect to the voltage (eg, positive voltage) in one direction with respect to the AC power supply 7.

In the case of FIG. 1, the voltage and current can be detected for both positive and negative bidirectional voltages.

[0024]

As described above, in the abnormality detecting device of the present invention, the voltage corresponding to the operation of the load during the operation of the load,
Since the current is checked, when an abnormality occurs in the load, the abnormality can be immediately detected and the abnormality can be notified. In addition, a timer means for timing the time corresponding to the operation of the load is provided, and it is determined whether or not the voltage and current corresponding to the instructed operation can be detected by the time the timer is up. It can be carried out.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment of the present invention.

FIG. 3 is an explanatory diagram of an abnormality detection operation.

FIG. 4 is an explanatory diagram of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 control part 2 load control means 3 abnormality determination means 5 timer means 6 load 10 drive means 20 voltage detection means 30 current detection means 40 display means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirokazu Ueda Noritsu Co., Ltd. 32 Akashi-cho, Chuo-ku, Kobe-shi, Hyogo

Claims (2)

[Claims] 1. A voltage detection circuit that detects information about a voltage applied to the load when the load is operating, a current detection circuit that detects information about a current flowing through the load, information about a voltage detected by the voltage detection circuit, and the current. Anomaly detection means characterized by comprising: an abnormality determination means for determining an abnormality of a load based on information on a current detected by a detection circuit; and a display means for displaying an abnormality when the abnormality determination means determines an abnormality. apparatus. 2. An abnormality detection device for detecting an abnormality of the load, comprising: a load drive means for driving a load; and a load control means for instructing the load drive means to operate. Voltage detecting means for detecting information about voltage, current detecting means for detecting information about current flowing through the load, timer means for measuring a predetermined time after the load control means instructs the operation of the load, and the timer means Abnormality determining means for determining an abnormality based on whether or not the voltage detecting means and the current detecting means have detected information about voltage and current corresponding to the operation of the load before the predetermined time is measured, and the abnormality determining means. An abnormality display device comprising: a display unit that displays an abnormality when it is determined to be abnormal.