KR200165244Y1 - A diagnostic apparatus for sensing a fine short of a conductor - Google Patents

Abstract

The present invention provides a contact by a momentary short circuit, in which the conductive wire is momentarily shorted from an electrically connected state by an external impact such as a vibration or a short time from the shorted state to an instantaneous electrical connection state is less than a second (ms) in advance. It is a device for detecting a defect.

The instantaneous contact failure sensing device according to the present invention measures the voltage difference between the two lead wires by supplying a current after fixing the lead wires at both ends of the conductive wire, and sets a measurement reference value.

Next, when a vibration is applied to the conductive wires from the outside, when there is a minute short circuit in the conductive wires, the conductive wires generate instantaneous contact failure due to the vibration, and the voltage difference between the two lead wires is suddenly changed.

When the difference between the measured instantaneous contact failure is compared with the stored reference value and the difference between the two values is within a specific range, it is judged as the measured voltage value due to the error of the measuring instrument itself or the noise around the measurement and the like. The voltage difference is re-measured and determined to be a poor contact due to a minute short circuit on the conductive wire if the voltage difference is over a specific range.

The specific range may be arbitrarily designated and input by the user according to the accuracy of the measurement required by the user, and if it is determined that the contact is poor due to a minute short circuit on the conductive wire, the specific range may be specified on a separate display device to inform the user of the fact. An error signal is output, and the display device receives the specific error signal outputted to notify the user of an error as a signal that can be identified by the user.

Description

A diagnostic apparatus for sensing a fine short of a conductor

The present invention is a device for detecting a contact failure caused by a fine short circuit on the conductive wire. In particular, the present invention is to contact the contact failure due to the instantaneous short-circuit of the moment that the conductive wire is short-circuit from the electrically connected state or the short-circuit state to the electrical connection state by the external impact such as vibration, etc. It is a device for sensing.

With the development of electronics and instrumentation engineering, almost all products and systems in today's era are controlled by electronic control. The basic configuration of the product or system by the electronic control is the execution unit that actually executes a function and the electrical response signal of the execution unit for a specific input signal in order to operate the execution unit within a desired range and then respond to it. And a control unit for transmitting and controlling an electrical control signal to the execution unit, and a connection unit electrically connecting the execution unit and the control unit.

On the other hand, when an abnormality occurs in the parts or system by such an electronic control, a conventional general diagnostic device was diagnosed for the following parts.

That is, whether the execution unit outputs a normal output signal with respect to the specific input signal, whether the output control signal of the control unit has a normal value with respect to a signal input from the execution unit, and the connection unit has an electrical defect such as a short or disconnection. By confirming that the defects could be found.

Such diagnostic devices have been developed in various uses and forms with the development of electronic control technology. However, despite the technical development of such a diagnostic apparatus, the simplest and basically should be measured and diagnosed, but there are certain items that cannot be measured and diagnosed by the conventional diagnostic apparatus.

As such, a representative example of the basic items that cannot be measured and diagnosed by a conventional diagnostic apparatus is measuring a poor contact caused by a minute short circuit occurring instantaneously in an extremely short time on a conductive conductor.

The causes of such instantaneous contact failures are various, for example, physical fatigue accumulates due to continuous external vibration, and a minute short circuit occurs. In the case of such a minute short circuit, when the external vibration is applied, instantaneous contact failure occurs regularly or irregularly. Therefore, in the conventional diagnostic apparatus, the instantaneous contact failure caused by such a micro short circuit cannot be measured, and only the complete disconnection can be distinguished.

For example, in the case of electronic components in automobiles, there is a high possibility of instantaneous contact failure due to the continuous vibration as described above. However, a diagnostic device such as a conventional scanner only gives information that a problem has occurred in a part or a part, and when the part or part in question is actually inspected, it operates normally unlike the diagnosis result of the diagnostic device. There were a lot. Since the instantaneous contact failure caused by such a fine disconnection is almost impossible to measure even by a general tester, even in the maintenance shop, a lot of time is spent in finding the cause of the failure, and thus the situation with the customer is frequently caused because accurate diagnosis cannot be made.

Although the measurement and diagnosis of instantaneous contact failure due to such a fine short circuit are required and performed most fundamentally, no effective solution has been proposed.

An object of the present invention is to provide an instantaneous contact failure detection device by a fine short circuit for solving the problems of the prior art.

1 is a hardware configuration of the instantaneous contact failure detection device according to the present invention

Figure 2 is a flow chart of the detection method using the instantaneous contact failure detection device according to the present invention.

≪ Description of Codes for Major Parts of Drawings>

200 lead wire 260 second comparison means

210: power supply 270: determination means

220: measuring means 280: display device

230: first comparison means 240: storage means

250: vibration means

The instantaneous contact failure detection device according to the present invention is as follows.

First, after confirming the malfunctioning portion by a conventional diagnostic device, a pair of lead wires which are fixed to both ends of the conductive lead, such as the electrical wiring in the malfunctioning portion or connected to the malfunctioning portion, and in electrical contact with the conductive lead,

First comparing means for supplying a current on the conductive wire through the lead wire to measure a voltage difference between the two lead wires, and then comparing whether the measured voltage difference is within a first error range of a specific range;

A microprocessor configured to set and measure the measured voltage difference as a measurement reference value when it is determined by the first comparing means to be within the first error range;

Vibration means for applying a vibration on the conductive wire from the outside,

When there is a minute short circuit in the conductive wire, the conductive wire generates an instantaneous contact failure due to the vibration, and at this time, the voltage difference between the measured lead wires is input to the microprocessor to compare with the previously stored measurement reference value. 2 comparison means,

When the difference between the voltage difference due to the vibration compared by the second comparison means and the reference measurement value is within a specific second error range, it is determined as a voltage value measured by an error with respect to the measuring device itself or noise around the measurement. Judging means for re-measuring the voltage difference between the two lead wires and determining that the contact difference is caused by a minute short circuit on the conductive wire if the voltage difference is greater than or equal to the second error range;

When it is determined by the determination means that the contact failure due to the minute short circuit on the conductive wires, the display device for informing the user of the fact in a signal of the user identifiable form.

The first and second error ranges are arbitrarily designated and input by the user according to the accuracy of the measurement required by the user. In more detail, the first error range is an error range for distinguishing the case where the conductive wire is not an instantaneous contact failure caused by micro vibration, such as a complete short circuit, and the second error range is an error for the measuring device itself. This is an error range to remove noise caused by vibrations around the measurement.

In particular, the contact failure detection device by the minute short circuit on the conductive wire according to the present invention is a minute short circuit on the conductive wire is instantaneously shorted from the state in which the conductive wire is electrically connected or short-circuit from the electrically connected state due to vibration It is suitable for detecting instantaneous contact failure when the state transition time is less than a second (ms) in advance.

In addition, the display device according to the present invention displays a specific type of error signal by the monitor, the error signal display by the monitor is to display the error signal generated within a period set by the user continuously or fixed on the monitor It is possible.

According to the present invention, another means for notifying a user of poor contact due to a microshort circuit is an acoustic device. The error state display by the sound may be represented by changing the intensity of the sound generated according to the degree of error.

According to the present invention, another means for notifying a user of poor contact due to a micro short circuit is by a separate light emitting means.

The error state display by the light emitting means may be displayed by changing the intensity of light emitted according to the degree of error.

As described above, the present invention applies an electrical signal between both ends of the conductive wire to be measured to determine whether there is a poor contact due to a fine short circuit, and then measures a change in the electrical signal between the both ends and compares it with a reference value.

At this time, the electrical signal is measurable, and any kind of electrical signal whose measured value can be compared with a reference value is possible, and particularly, a voltage value is preferable.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings and an embodiment.

1 is a configuration of the instantaneous contact failure detection device according to the present invention.

As shown in FIG. 1, the present invention includes a pair of lead wires 200 fixed to both ends of a conductive wire and in electrical contact with the conductive wire,

A power supply device 210 for supplying current to the conductive wire through the lead wire;

Measuring means 220 for measuring a voltage difference between the two lead wires;

First comparing means 230 in a microprocessor for receiving the voltage difference measured by the measuring means and comparing whether the voltage difference is within a first error range of a specific range;

A storage means 240 in a microprocessor for setting and storing the measured voltage difference as a measurement reference value when it is determined by the first comparing means to be within the first error range;

Vibration means 250 for applying a vibration on the conductive wire from the outside,

When there is a minute short circuit in the conductive wire, the conductive wire causes instantaneous contact failure due to the vibration, and the microprocessor comparing the measured voltage difference between the measured lead wires with the measurement reference value previously stored in the storage means. Second comparison means 260 in the interior,

When the difference between the voltage difference due to the vibration compared by the second comparison means and the reference measurement value is within a specific second error range, it is determined as a voltage value measured by an error with respect to the measuring device itself or noise around the measurement. Determination means 270 for re-measuring the voltage difference between the two lead wires, and determining that the contact difference is caused by a minute short circuit on the conductive wire when the voltage difference is greater than the second error range;

If it is determined by the determination means that the contact is poor due to a minute short circuit on the conductive wires, the display device 280 notifies the user of the fact with a signal in a form identifiable by the user.

2 is a flowchart illustrating a sensing method using an instantaneous contact failure sensing device according to the present invention.

Referring to the detection method using a sensing device according to the present invention according to the flow chart shown in FIG.

Initialize the hardware of the measuring device first (step 10),

Supplying a current on the conductive conductor to be measured to measure the voltage difference between the two lead wires fixedly coupled to both ends of the conductive conductor (step 20).

The measured voltage difference is input to a microprocessor, and the microprocessor determines whether the measured voltage difference is within a specific range of errors (step 30).

As a result of the determination, if the error is within the specific range, the measured voltage difference is set as a measurement reference value and stored.

Next, vibration is applied to the conductive wire from the outside (step 50).

The voltage difference between the two lead wires is measured and input to the microprocessor. (Step 60).

The microprocessor compares the voltage difference between the measured lead wires with previously stored measurement reference values (step 70).

As a result of the comparison, when the difference between the two values is within a specific range (for example, ± 3%), the voltage difference between the two lead wires is re-measured by determining the voltage value measured by the error of the measuring device itself or the noise around the measurement. (Step 80)

As a result of the comparison, if the difference between the two values is greater than or equal to a certain range, it is determined that the contact failure is caused by a fine short circuit on the conductive wire (step 90).

If it is determined that the contact is poor due to a minute short circuit on the conductive wire, the microprocessor outputs a specific error signal to a separate display device to notify the user of the fact (step 100).

The display device receives the specific error signal output and notifies the user of an error as a signal of a user identifiable form (step 110).

The instantaneous contact failure detection device according to the present invention is applicable to various types of measurement fields. For example, it can be applied to a scanner, a conventional tester, an oscilloscope, etc., which are essential means for diagnosing a condition of a vehicle in an automobile repair shop.

In particular, the conventional scanner has been difficult to accurately diagnose except the expert in the automobile repair shop, but by using the diagnostic device applying the instantaneous contact failure detection device according to the present invention can easily diagnose the state of the car at home.

The present invention seems to be a simple means for solving the problems of the prior art at first glance, even though it has been desperately required by those skilled in the art to solve the problem that the solution was not presented in the present simplest device presented There is novelty and progress in doing so.

The instantaneous contact failure detection device according to the present invention, which can be applied to an automobile diagnostic scanner, tester, oscilloscope, etc., has an advantage that anyone can easily and quickly diagnose a momentary contact failure that is difficult to diagnose even by a conventional user.

Claims (8)

In a device for detecting a poor contact caused by a minute short circuit on the conductive lead, A pair of lead wires 200 fixed to both ends of the conductive wire to be searched and in electrical contact with the conductive wire; A power supply device 210 for supplying a current to the conductive wire through the lead wire; Measuring means (220) for measuring a voltage difference between the two lead wires; First comparing means in a microprocessor (230) for receiving a voltage difference measured by the measuring means and comparing whether the voltage difference is within a first error range of a specific range; A storage means (240) in a microprocessor for setting and storing the measured voltage difference as a measurement reference value when it is determined by the first comparing means to be within the first error range; Vibration means for applying a vibration on the conductive wire from the outside (250); When there is a minute short circuit in the conductive wire, the conductive wire causes instantaneous contact failure due to the vibration, and the microprocessor comparing the measured voltage difference between the measured lead wires with the measurement reference value stored in the storage means. Second comparing means 260 in the interior; When the difference between the voltage difference due to the vibration compared by the second comparison means and the reference measurement value is within a specific second error range, it is determined as a voltage value measured by an error with respect to the measuring device itself or noise around the measurement. Judging means (270) for re-measuring the voltage difference between the two lead wires, and determining that the contact difference is caused by a minute short circuit on the conductive wire when the voltage difference is greater than the second error range; And a display device 280 which informs the user of the fact as a signal in a form which can be identified by the user when it is determined that the contact means is caused by a fine short circuit on the conductive wire by the determining means. Contact failure detection device. 2. The method of claim 1, wherein the minute short circuit on the conductive wire has a time of changing from the state in which the conductive wire is electrically connected by the vibration to the instantaneous short circuit or from the shorted state to the instantaneous electrical connection state in seconds or less (ms). , Defective contact detection device by fine short circuit on conductive wire. The apparatus of claim 1 or 2, wherein the display device visually displays a specific type of short signal by a monitor. The apparatus of claim 3, wherein the short circuit signal display by the monitor fixes and displays a short circuit signal generated within a period set by a user on the monitor. The apparatus of claim 1 or 2, wherein the display device displays a short circuit state by an acoustic device. 6. The apparatus of claim 5, wherein the short circuit status display by the acoustic apparatus changes the intensity of the sound generated according to the degree of the error. The apparatus of claim 1 or 2, wherein the display device displays a short circuit condition by light emitting means. The apparatus of claim 7, wherein the short-circuit state display by the light emitting means changes the intensity of light emitted according to the degree of short-circuit.