JPS58140814A - Checking and diagnosing device of electric control system - Google Patents

Abstract

PURPOSE:To perform checking and diagnosis with high efficiency without time loss, by having a self-diagnosis to the part common with a system group to be checked and an individual diagnosis to the part which is proper individually. CONSTITUTION:The parts common to the system group to be checked and individual parts are sorted respectively and connected to connectors 1 and 2-2''. Then the common parts are selected with operation of a rotary switch 3, and an input signal is supplied to a CPU10. Thus the CPU10 performs a self-diagnosis and displays the result to a display plate 11. At the same time, the individual parts are selected by the switch 3, and an input signal is supplied to the CPU10. Then the CPU10 performs an individual diagnosis and displays the result. In such a way, the checking and diagnosis can be performed with high efficiency without time loss.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention can be applied to multiple types of electrical control systems with similar purposes, and automatic diagnosis can be performed for parts common to a group of systems to be inspected, and for parts unique to each individual system. The present invention relates to an inspection/diagnosis device for electrical control systems that allows work to be carried out efficiently without wasting time by performing individual diagnosis.

The sensors, actuators, and electrical components in the control circuit that make up an electrical control system complement each other to function as an overall system and operate mechanical equipment, but the state of these parts changes depending on the operating status of the equipment. In order to inspect and diagnose the operation of a system, it is necessary to consider and pursue the operation of individual parts, down to their priorities, and the amount of inspection is huge, so in general, inspection and diagnosis equipment is used to conduct systematic inspections. We are working to make the work easier.

In recent years, users' requests for equipment have become increasingly individualized, and combined with technological advances, control contents have become diverse and are changing rapidly. The scope of use of such automated specialized machines is extremely limited, and even those that can be put into practical use are inconvenient to handle and require specialized knowledge, and other problems have been highlighted.

The purpose of the present invention is to counter this by providing that, if most of the system diversification depends on improvements in the electrical circuitry, and the control objectives are generally similar, the types and functions of mechanical components such as sensors and actuators will not change much. We focused on the fact that there is no such thing, and tried to automate the handling by categorizing it, and taking into consideration that workers only need to conduct individual diagnosis for parts with strong electrical circuit elements that make the system unique.
An object of the present invention is to provide an inspection/diagnosis device that is applicable to many types of electrical control systems.

In order to adapt the device to each type of electrical control system, it is necessary to prepare connection lines specific to that system, which can be used to easily process the voltage signals of the inspection parts of the system within the device. The wires must be connected so that they can be taken out in the same shape.

In Figure 1, the signal input connector for component diagnosis, 2, 2
'... are signal input connectors for each diagnosis mode of the system, and the voltage signal s of mechanical components such as sensors and actuators is connected to the predetermined pin position of (1) of the system. For sensors whose signal does not change during operation, electricity is applied if it is normal, and a signal is extracted from the part where no voltage is applied if it is abnormal.

(2) For microswitches, prepare two terminals for normally closed and open in the input connector of the inspection device, make one set, use one of them to take out the microswitch signal, and if it is normal, inspect it as good. It is necessary to have ■■ that can be diagnosed by a diagnostic device. In addition, the voltage signals from parts that are strongly influenced by electrical circuit elements and require electrical measurement for diagnosis are divided into two depending on the diagnostic mode of the system.
, 2'..., but record it at the pin position.

A rotary switch 3 is used to select a diagnostic mode, which selectively drives electronic switches 5, 6, 7, 7', . . . via an interface 4.

3 in the figure has selected the parts automatic diagnosis mode, and the voltage signal of the mechanical component of the system inputted in 1 is converted by the signal converter 8 into a pass/fail signal depending on the presence or absence of voltage, and automatic diagnosis is performed. It is sent to switch 5 along with its inspection order and number. When 5 receives a good signal, it switches to the next inspection item and proceeds with the diagnosis, but if it receives a no signal, it interrupts the progress and notifies the computer 10, and displays the information on the display board 11 in column 1 of Figure 2. Display the sentence with the corresponding number. Among the display text examples, the ones with a circle at the beginning of the text mean that the system operation must be changed at this point, and the display text does not indicate the defective part, but is a command to the operator. . However, if the light does not go out even if you follow the instructions, the relevant part is defective.

To make the explanation easier to understand, the automatic diagnosis signal report will be explained in terms of the relationship between the input signal in 1 and the display text in 11.The inspection and diagnosis device should be connected with the power to the system under inspection turned off, and the inspection and diagnosis power switch first turned on. When you turn it on, if the supplied power supply is defective, the ``Checker Dengen'' will light up, so you need to check the circuits related to this. If the condition is good, proceed to the item and display "○ Main switch ON". this is,
The fact that the main switch is OFF and that display work is required to proceed with the diagnosis is indicated by a circle. When you turn on the main switch according to the instructions, a good signal is transmitted from 8, the message disappears, and the A sensor is inspected and diagnosed.
" will stop displaying.

There is a circle at the beginning of the sentence, so execute this command and proceed to the next step. By repeating these operations, the message ``OK'' is reached. If this is followed, all the internal components of the machine are in good condition and the message ``OK'' is displayed, completing the inspection and diagnosis of the parts. Note that if the same part has IP and OP appearing twice at the end of the sentence, IP indicates the input voltage to that part, and the signal is constant, but OP changes continuously with the output voltage to the control system. It is judged as normal when it becomes 1/2 of IP.

If automatic component diagnosis stops midway, or if more detailed diagnosis is deemed necessary, switch the rotary switch 3 and select component diagnosis, and the signal voltage will be displayed on the display board 11 along with the component brand. .

In this case, the electronic switch 6 is activated, but unlike 5, this allows the inspection item to proceed regardless of the result of the inspection diagnosis. For convenience of use, a changeover switch 12 is provided so that it can be used either manually or automatically, and is used in conjunction with a push button switch 12' for proceeding with diagnosis when manual is selected. 6 notifies the interface 4 of the diagnosis mode, inspection item number and signal voltage via the A/D converter 9, and the component name and signal voltage are displayed on the display board 11 as shown in the second column of FIG. Therefore, the operator can perform a more detailed inspection diagnosis of the mechanical component by comparing it with a separately prepared standard value table.

Next, in order to inspect and diagnose circuit breakers and modules that make up the electric circuit, use the third and subsequent stages of the rotary switch to drive the electronic switches 7, 7', etc., and use the signal voltage value to You can know whether it is good or bad. However, the display is second
As shown in the third column onward in the figure, only the diagnostic mode is known from the text, and the inspected areas are displayed by pin numbers, so it is necessary to compare them with the recorded data. Note that some signal voltages may be intermittent; in this case, this is indicated by a blinking symbol on the display board.

This completes the basic configuration and explanation of this device, but as a simple variation, a memory element is connected to the automatic diagnostic switch 5, a monitor switch 14 is added, and a function for tracking temporary failures during system operation is added. It is also possible to perform more advanced diagnosis.

The present invention relates to an inspection/diagnosis device that facilitates handling through text display and is capable of automatically diagnosing in response to slight fluctuations in the control contents of the system to be inspected. However, it is thought that the most effective application is to automobile inspection equipment, where the types and quantities of mechanical components are limited and the control content is relatively simple, although small modifications are carried out. I believe that the improvement is remarkable.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a block circuit diagram of the device, and FIG. 2 is an example of text displayed on a display board. 1: Signal input connector for component diagnosis 2, 2', 2''...:
Diagnostic mode signal input connector 3: Rotary switch 6, 7, 7', 7''...: Electronic switch 8: Signal converter 9: A/D converter 10: Computer 11: Display board 12: Selector switch 12': push button switch 13
, 13': Display lamp 14: Monitor switch 1
5: Monitor display lamp 16: ROM 17: RAM 18: Flashing signal inventor Mitsukiyo Hoshikawa

Claims (1)

[Claims] 1. Inspection diagnostic equipment that connects to the system under inspection and performs many inspection items, consists of a comprehensive automatic meter reading circuit for the entire system and a signal detection circuit for specific items.
An inspection/diagnosis device for electrical control systems that displays results in text and is applicable to multiple types of systems with different contents.