JPH0511277U - High reliability type relay device - Google Patents

Abstract

(57) [Summary] [Purpose] To accurately predict the relay contact life according to the actual conditions of use and to know the relay replacement timing accurately. [Structure] Counter means 5 for counting the number of times of opening / closing of a relay contact, current / voltage measuring means 6 for measuring a current flowing through the relay contact and a voltage applied to the contact, and provided by a manufacturer based on the value of the measured current / voltage. Life data correction means 7 for correcting the data relating to the life of the relay that has been set,
A signal for inputting the count value from the counter means 5 and the correction value corrected by the life data correction means, correcting the count value, and instructing to replace the relay when the number data of the corrected relay contact reaches a predetermined value. And the life frequency estimation calculation means 9 for outputting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a relay device which is widely used in electric and electronic circuits. The contact opening / closing frequency, the contact current, and the contact voltage that cause mechanical and electrical life. A high-reliability type that allows you to output a warning signal for relay replacement time by monitoring Regarding the relay device.

[0002]

[Prior art]

  Relays actuate various actuators, for example according to the output from the sequencer It is used in a wide range of fields, such as when making motions or detecting mechanical movements. . Conventional relay devices have a life curve (for resistive load) provided by the manufacturer. Then, based on this, the lifespan of contact opening and closing can be estimated from the contact current, contact voltage, etc. It was.

[0003]

[Problems to be solved by the device]

  However, the contact load is an inductive load such as a lamp or motor, It is only for detecting signals, and its usage forms are various. It is not possible to estimate the number of lives as it is from the life curve that The degree of use also differs depending on the use case, making it difficult to accurately predict relay failures. .

[0004]   The present invention has been made in view of these points, and monitors the actual use state of the relay. You can check the life, accurately judge the life based on the usage status, and notify the replacement time. It is an object of the present invention to provide a highly reliable relay device.

[0005]

[Means for Solving the Problems]

  The present invention that achieves such an object is   Relay circuit and relay drive circuit that drives the relay circuit In the lathe device,   Counter means for counting the number of times the relay contact is opened and closed,   Current-voltage measurement to measure the current flowing through the relay contact and the voltage applied to the contact Means and   Based on the current and voltage values measured by this current-voltage measuring means, Life data correction means for correcting the data regarding the life of the relay being provided ,   Enter the count value from the counter means and the correction value corrected by the life data correction means. Force to correct the count value, and the corrected relay contact open / close count data reaches the specified value. The life frequency estimation calculation means that outputs a signal to replace the cod relay A highly reliable relay device characterized by being provided.

[0006]

[Action]

  The counter means counts the number of times the relay contact is actually opened and closed. Relay connection The current and voltage magnitudes flowing at the points are constantly monitored by the current-voltage measuring means. Lille -If the current or voltage flowing through the contacts becomes large, the contacts will be consumed, transferred, welded, etc. Ji increases. The life data correction means is based on the measured value from the current voltage measurement means. Then, correct the life data provided by the manufacturer.

[0007]   The life frequency estimation calculation means uses the count value from the counter means to correct the life data. Compensate according to the data from the stage and multiply the compensated value from the start of operation of the relay. If the integrated value reaches the number of relay contact lifespan, the relay replacement Output the system.

[0008]

【Example】

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.   FIG. 1 is a configuration block diagram showing an embodiment of the present invention. In the figure, 1 is In the Ray circuit, for example, a load 2 such as a motor and a power supply 3 for operating the load are It is connected in series. 4 is a relay drive circuit for driving the relay circuit 1 Although not shown, the relay circuit 1 is excited by receiving an output from, for example, a sequencer. It is configured to output a drive signal to the coil. 5 is opening and closing of relay contact The counter means for counting the number receives the drive signal from the relay drive circuit 4. , The number of times of opening / closing (on / off) is counted. 6 relay times Current voltage that measures the current i flowing in the relay contact of path 1 and the voltage v applied to the contact The measuring means includes an A / D converter. 7 is measured by the current-voltage measuring means 6 The relay life provided by the manufacturer based on the current and voltage values Is a life data correction means for correcting the data. 8 is provided by the manufacturer A ROM that stores data related to relay life (life curve data, etc.) The life data correction means 7 can be referred to. 9 is a counter from the counter means 5. The count value and the correction value corrected by the life data correction means 7 are input to supplement the count value. Correct, and replace the relay when the corrected relay contact count data reaches a specified value. Life number estimating and calculating means for outputting a signal instructing It is an alarm means for receiving an signal from the stage 9 and outputting an alarm.

[0009]   Counter means 5 surrounded by broken lines, life data correction means 7, life frequency estimation calculation means Reference numeral 9 is a current generator including an A / D converter, which is composed of, for example, a microprocessor. Digital data from the pressure measuring means 6 is input. ROM8 is used as a relay A corresponding one is connected to the data bus of the microprocessor. Further, as the alarm means 10, one which outputs a voice, and an alarm display on the display means Anything that can be done can be used.

[0010]   The operation of the apparatus thus configured will be described below.   FIG. 2 is a flowchart showing an example of the operation. Prior to use, release the The ROM 8 in which data such as the life of the memory is stored is connected to the microprocessor. Na In this example, it is assumed that the data is stored in the ROM 8 in advance, With a keyboard, etc., those data can be stored in the memory inside the microprocessor. You may input it. Next, the operation of the relay circuit 1 is started. Relay circuit 1 is turned on / off by the relay drive circuit 4 to operate the load 2. Coun Means 5 counts the number of times the relay contacts are turned on and off, and Stage 6 measures the current i flowing through the relay contact and the voltage v applied to the relay contact. Also Data such as these waveforms may be measured. Flowing through relay contacts If the current or the voltage applied to the relay contact is larger than the specified value, the contact The rate of causing wear, transition, welding, etc. increases and the life is shortened accordingly. Therefore, Kotobuki The life data correction means 7 is a manufacturer based on the measured value from the current / voltage measurement means 6. Correct the life data or life curve provided by That is, measured If the current or voltage is larger than the specified value, the life indicated by the manufacturer Correct to reduce the number of times.

[0011]   The life count estimation calculation means 9 supplements the count value from the counter means 5 with life data. Correction is made according to the data from the corrector 7, and the corrected value is set when the relay starts operation. Start from. Then, the integrated value reaches the number of lifespan after the correction of the relay contact. Whether the relay has reached the end of its life, an alarm for relay replacement is issued through the alarm means 10. Output. The life count estimating means 9 turns on the life count and the relay from the start of operation. / By calculating the difference from the integrated value of the number of off times, the remaining amount of the number of lifespan can be obtained. The remaining amount can be displayed.

[0012]   Note that the life of relay contacts also depends on the temperature of the atmosphere. Therefore, A temperature sensor that detects the ambient temperature of the relay is provided, and the signal from this temperature sensor is output. The life data provided by the manufacturer is configured to be applied to the life data correction means 7. The curve may also be corrected by the ambient temperature.

[0013]   FIG. 3 is a conceptual diagram showing the construction of another embodiment of the present invention. In this embodiment, two sets Relay circuits 1a and 1b are prepared in advance, and one relay circuit 1a is turned on / off. When the number reaches the number of lives, the relay switching circuit 11 switches to the other relay circuit 1b. In addition, the relay circuit 1a used up to that time can be replaced. Of. This allows a more reliable solution for online maintenance. Wray device can be provided.

[0014]

[Effect of device]

  As described above in detail, according to the present invention, the life of the relay contact is determined by the actual usage. It is also possible to accurately predict the time and to know exactly when to replace the relay. A highly reliable relay device can be provided.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing an example of operation.

FIG. 3 is a schematic diagram showing the configuration of another embodiment of the present invention.

[Explanation of symbols]

1 relay circuit 2 load 3 power supplies 4 relay drive circuit 5 Counter means 6 Current-voltage measuring means 7 Life data correction means 8 ROM 9 Life frequency estimation calculation means 10 Warning means

Claims (2)

[Scope of utility model registration request] 1. A relay device comprising a relay circuit and a relay drive circuit for driving the relay circuit, wherein counter means for counting the number of times of opening and closing of the relay contact, current flowing through the relay contact, and application to the contact. Current-voltage measuring means for measuring the voltage, life-data correcting means for correcting the data concerning the life of the relay provided by the manufacturer based on the current and voltage values measured by the current-voltage measuring means, and the counter means The count value and the correction value corrected by the life data correction means are input, and the count value is corrected, and a signal is output to instruct to replace the relay when the corrected contact opening / closing frequency data reaches a predetermined value. A highly reliable relay device, characterized in that it is provided with a lifetime estimating and calculating means. 2. A temperature sensor for detecting the ambient temperature of the relay circuit is provided, and the life data correction means corrects the data related to the life of the relay provided by the manufacturer also by a signal from the temperature sensor. The highly reliable relay device according to claim 1.