JP2723666B2 - Relay characteristic measuring instrument and measuring method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a relay characteristic measuring device for measuring a touching value and a restoration value, which are one of characteristic values of a relay, and a measuring method thereof.

[Conventional technology]

Conventionally, this type of relay characteristic measuring instrument and its measuring method are composed of a constant voltage power supply 21 and a variable resistor 22 as shown in FIG.
When the relay 4 to be measured is measured, it is connected as shown in FIG.
, While measuring the impression value, the measured relay 4
The variable resistor 22 is manually operated such that the measured relay 4 becomes the limit at which the operated relay 4 recovers, and the voltage at both ends of the measured relay 4 is measured.
Alternatively, the value of the current flowing through the relay 4 to be measured was measured.

[Problems to be solved by the invention]

The above-described conventional relay characteristic measuring instrument and its measuring method have a configuration in which a switch and a variable resistor are manually operated, so that a long measuring time is required, and a long time is required for the measurement. There is a disadvantage that the coil resistance increases due to the temperature rise due to the heat generation of the coil, the voltage value at the limit point increases, and the voltage value at the limit point becomes a value obtained by adding the value of the coil resistance increase. In addition, since the measurement time is not constant, there is a disadvantage that the voltage value at the limit point varies.

[Means for solving the problem]

The relay characteristic measuring instrument of the present invention is a programmable power supply that automatically changes the value of an applied voltage to be applied to a measured relay by an input control signal, and an identification circuit that identifies an operation of the measured relay by the applied voltage. From the predetermined rated voltage of the relay to be measured and the measurement resolution of the relay characteristic measuring device (the measurement resolution × 2 ⁿ > the rated voltage ×
A positive integer n that satisfies 1/2) is obtained in advance, and the programmable power supply is initialized so that the value of (the measurement resolution × 2 ⁿ ) becomes an initial voltage applied to the relay to be measured. According to the result signal (1/2 of the voltage value obtained by previously adding or subtracting the output voltage of the programmable power supply)
And a control circuit for automatically generating the input control signal and outputting the input control signal to the programmable power supply so as to output a value obtained by adding or subtracting the previously applied voltage value. "The measuring method of the relay characteristics of the present invention is based on the predetermined rated voltage of the relay to be measured and the measuring resolution of the own relay characteristic measuring device (the measuring resolution × 2 ⁿ > the rated voltage × 1/1). 2) A positive integer n that satisfies 2) is obtained in advance, and the programmable power supply is initialized so that the value of (the measurement resolution × 2 ⁿ ) becomes the initial applied voltage to the relay to be measured. The operation of the relay to be measured is identified, and (1/2 of the voltage value obtained by previously adding or subtracting the output voltage of the programmable power supply) is added or subtracted from the previously applied voltage value by the identification result signal of the identification circuit. The control circuit automatically generates an input control signal to the programmable power supply so as to output a value, and the operation of the relay under test by a newly applied voltage value is determined by the identification result of the identification circuit. And a method of obtaining a measure of excitement value and recovery value of the measured relay from the application voltage value of the determination to the operation limit from No..

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a relay characteristic measuring instrument showing one embodiment of the present invention, and FIG. 2 shows an example of a calculation formula of an applied voltage value in the case of measuring a moving voltage value to a relay to be measured in the present embodiment. FIG. 3 is a diagram showing an example of a waveform of a flashing voltage in the case of measuring a sensing voltage value in which the applied voltage value calculated by the calculation formula shown in FIG. 2 is applied to the coil of the relay to be measured.

In FIG. 1, a relay characteristic measuring instrument 1 of the present embodiment includes a programmable power supply 11 for varying an applied voltage value to be applied to a measured relay 3 in accordance with an input control signal;
And a control circuit 13 for generating an input control signal to the programmable power supply 11 based on an identification result signal from the identification circuit 12. ing.

Next, the operation and the measuring method of the present embodiment will be described first.
Explanation will be made with reference to FIG. 2, FIG. 2 and FIG.

First, an example of obtaining a moving voltage value will be described. The rated voltage of the relay under test 3 is 3 [V], and the operating voltage is 1.9.
[V], the measurement resolution of the relay characteristic measuring instrument 1 is 0.1 [V].
Assume that Here, when n is a positive integer, the minimum n that satisfies the formula (measurement resolution) × 2 ⁿ ｝> (rated voltage of relay under test 3) × 1/2 is 4, and (measurement resolution) × 2 ⁴ = 1.6 [V].

As the initial setting of the control circuit 13, the voltage applied to the first application is 0 [V], and the added voltage is 1.6 [V].
Control the programmable power supply 11 so that
[V] is applied to the relay 3 to be measured. This result indicates that the measured relay 3 does not operate because the sensing voltage value of the measured relay 3 is 1.9 [V]. That is, it is off.

The control circuit 13 receives the result signal of the second to the first turn-off from the identification circuit 12 so that the control circuit 13 can add the first addition value 1.6.
0.8 [V] which is 1/2 of [V] is applied to the first applied voltage 1.6
When a control signal is sent to the programmable power supply 11 so as to add to [V], the programmable power supply 11
[V] is applied to the relay 3 to be measured. As a result, the identification circuit 12 outputs an ON result signal, and the third time is the second addition value. The control circuit 13 controls the programmable power supply 11 so that 0.4 [V] of 0.8 [V] 1/2 is subtracted from the second applied voltage of 2.4 [V], and the programmable power supply 11 controls 2.
0 [V] is applied to the relay 3 to be measured.

As explained above, the value of the previous addition or subtraction
If 1/2 is subtracted from the previous applied voltage value when the previous operation result of the relay to be measured is on, then 1/2 is added, and if the operation result is off, the added value is applied. An example of the equation for calculating the applied voltage value is shown in the second
FIG. 3 shows an example of the applied voltage waveform in FIG. 3. In FIG. 2, the fifth added value is 0.1 [V] and the measurement resolution is 0.1 [V]. As a result, the impression value exists between 1.8 [V] and 1.9 [V], and the safety value is set to 1.9 [V].

From the above description, the number of application operations is (n + 1) times obtained by adding 1 to the above-mentioned n. If the relays have the same rated voltage, the operation always ends with the same number of applications. In the example of Fig. 3, the measurement time is
It can be completed in a short time of 1.2 [seconds].

In the case of measurement of the restoration value, in the case of the impression value, when the previous result is on, half the value of the previous addition or subtraction was subtracted, whereas in the case of the impression value, the addition was performed in reverse, and the previous result was added. If is turned off, the addition may be performed, whereas the addition may be subtracted. Further, in order to obtain the current value, the current flowing at the time of the fifth application is measured, or the programmable power supply is of a constant current type.

〔The invention's effect〕

As described above, the present invention provides a programmable power supply that automatically changes the value of an applied voltage applied to a measured relay by an input control signal, an identification circuit that identifies the operation of the measured relay based on the applied voltage, and an identification circuit that identifies the operation of the programmable power supply. A control circuit that generates the next input control signal according to the circuit identification result signal and sends it to the programmable power supply, and automatically measures the characteristics of the relay to be measured so that the subject's subjectivity can be entered in a short time. There is an effect that can obtain no measurement value. Also, if the relays have the same rated voltage, the measurement will always be completed in the same measurement time.Therefore, the variation in the measurement error caused by the coil resistance rising due to the temperature rise due to the heat generated by the coil of the relay to be measured should be regarded as almost constant. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a block diagram of a relay characteristic measuring instrument showing one embodiment of the present invention, and FIG. 2 shows an example of a calculation formula of an applied voltage value in the case of measuring a moving voltage value to a relay to be measured in the present embodiment. FIG. 3 is a diagram showing an example of a waveform of an applied voltage in the case of measuring a moving voltage value in which an applied voltage value calculated by the calculation formula shown in FIG. 2 is applied to a coil of a relay to be measured. FIG. 1 is a block diagram showing an example of a conventional relay characteristic measuring device. 1,2: Relay characteristic measuring instrument, 11: Programmable power supply, 12: Relay on / off identification circuit, 13: Control circuit,
3, 4 ... relay to be measured, 5 ... rated voltage, 6 ... first applied voltage, 7 ... second applied voltage, 8 ... third applied voltage, 9 ... fourth applied voltage , 10 ... 5th applied voltage, 21 ... constant voltage power supply, 22 ... variable resistor, 23 ...
switch.

Claims (2)

(57) [Claims] 1. A programmable power supply for automatically changing a value of an applied voltage to be applied to a measured relay by an input control signal, an identification circuit for identifying an operation of the measured relay by the applied voltage, and the measured relay From the predetermined rated voltage and the measurement resolution of the relay characteristic measuring instrument, a positive integer n that satisfies (the measurement resolution × 2 ⁿ > the rated voltage × 1/2) is obtained in advance, and the (the measurement resolution × 2 ⁿ ) Is initially set so that the value of the programmable power supply becomes the initial applied voltage to the relay to be measured, and (1 of the voltage value obtained by previously adding or subtracting the output voltage of the programmable power supply) is determined by the identification result signal of the identification circuit. / 2) to automatically generate the input control signal and output the signal to the programmable power supply so as to output a value obtained by adding or subtracting the previous applied voltage value to the previous applied voltage value. Relay characteristic measuring apparatus according to claim and. 2. A positive integer n that satisfies (the measurement resolution × 2 ⁿ > the rated voltage × 1/2) from the predetermined rated voltage of the relay to be measured and the measurement resolution of the relay characteristic measuring device of the relay. The programmable power supply is initialized so that the value of (the measurement resolution × 2 ⁿ ) becomes the initial applied voltage to the relay to be measured, and the operation of the relay to be measured by the applied voltage is performed by the identification circuit. The programmable circuit is configured to output a value obtained by adding or subtracting (1/2 of the voltage value obtained by previously adding or subtracting the output voltage of the programmable power supply) from the previously applied voltage value according to the identification result signal of the identification circuit. The control circuit automatically generates an input control signal to a power supply, and determines the operation of the relay under test based on a newly applied voltage value from an identification result signal of the identification circuit from an operation limit. Method of measuring relay characteristic, characterized in that the applied voltage value with the determination of the measurements of the impression value and the recovery value of the measured relay.