WO2025015709A1 - Portable relay tester and testing method therefor - Google Patents

Abstract

The present invention relates to a portable relay tester and a testing method therefor. The testing method comprises: an embedded single-chip microcomputer being used for receiving an instruction of a superordinate computer and sending the instruction to an execution mechanism to execute testing logic; collecting contact states of a plurality of signal relays, and calculating time of a certain execution action on the basis of a change state signal of the contact states; and outputting an analog signal to a program-controlled adjustable power supply, so as to control the program-controlled adjustable power supply to output voltages and currents adapted to various relays; and the execution mechanism executing the instruction of the embedded single-chip microcomputer to switch the actions of the signal relays. The signal relays are connected to a sensor module by means of a bridge rectifier filter circuit, so as to provide stable direct current signals to the sensor module; and by means of a high-speed acquisition board, the sensor module transmits the collected signals of the signal relays to the superordinate computer. In the testing process, the adverse effects of pulses of an input alternating current are effectively avoided by means of the bridge rectifier filter circuit, thus ensuring the accuracy of measurement parameters, and improving the measurement accuracy.

Description

A portable relay detector and detection method thereof Technical Field

The invention belongs to the technical field of detection equipment, in particular to a portable relay detector and a detection method thereof.

Background Art

At present, the domestic railway signal relay testing method basically adopts manual testing, which has large test errors and low efficiency. There is also an "AX-type relay electrical characteristics test bench" that is limited to testing the electrical characteristics and time characteristics of 8 types of relays. Moreover, when testing the relay working value, it is unable to detect the closed state of the relay armature, and can only use the coil voltage when the relay contact is connected as the working value. This test result does not meet the requirements of national standards.

In the prior art, there are technologies for relay detection, such as the invention patent with patent number CN202122890296.7, which discloses a portable relay automatic detector, which mainly focuses on realizing the inconvenience of train relay detection, especially the solution of the problem of being unable to get power, and the invention patent with patent number CN201721384399.3, which discloses a portable relay online detector, which mainly focuses on realizing the real-time storage of the detection structure of the relay. Both patent technologies use commonly used single-chip microcomputer or host computer control, adjustable voltage, sensor module and other technologies to realize the measurement and collection of relay voltage, current, contact (contact) resistance and other parameters, and both achieve miniaturization and portability, but they are inevitably present in the process of AC to DC conversion, because there are often some inevitable pulse voltages in AC, resulting in unstable current and voltage in the DC power coming out of the rectifier bridge, which will inevitably lead to the accuracy of the measurement result parameters deteriorating and the precision being reduced.

Summary of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a portable relay detector and a detection method thereof, which can meet the requirements of portability while further improving the accuracy and precision of measurement parameters.

The present invention solves the technical problem by adopting the following technical solutions:

A portable relay detector comprises a signal relay, an actuator, a programmable power supply, a sensor module, a host computer and an embedded single-chip microcomputer, wherein the signal relay is respectively connected to the sensor module and the embedded single-chip microcomputer, the sensor module is connected to the host computer, the host computer is connected to the embedded single-chip microcomputer, the embedded single-chip microcomputer is respectively connected to the programmable power supply and the actuator, the programmable power supply is connected to the actuator, and the actuator is connected to the signal relay.

Moreover, the embedded single-chip microcomputer is used to receive instructions from the host computer and send instructions to the actuator to execute the test logic; collect the contact status of multiple signal relays, and calculate the time to execute the action according to the change status signal of the contact status; and output analog signals to the programmable adjustable power supply to control the programmable power supply to output voltage and current suitable for various relays; the actuator executes the instructions of the embedded single-chip microcomputer to switch the action of the signal relay; the signal relay is connected to the sensor module through a bridge rectifier and filter circuit to provide a stable DC signal to the sensor module; the sensor module transmits the collected signal of the signal relay to the host computer through a high-speed acquisition board.

Moreover, the sensor module includes a voltage test module, a current test module, a resistance test module and an insulation test module, wherein the voltage test module is used to test the rated voltage, magnetizing voltage, release voltage and working voltage of the signal relay; the current test module is used to test the rated current, magnetizing current, release current and working current of the signal relay; the resistance detection module is used to test the coil resistance and contact resistance of the signal relay; and the insulation test module is used to test the insulation resistance of the signal relay coil to ground, contact to ground and coil to contact group.

Moreover, the signal relay is connected to the sensor module through a bridge rectifier filter circuit, wherein the bridge rectifier filter circuit includes an inductor L1, an inductor L2, a capacitor filter C1, a capacitor filter C2, a capacitor filter C3 and a rectifier bridge T, the positive pole of the AC input end is respectively connected to one end of the inductor L1 and one end of the capacitor filter C1, the negative pole of the AC input end is respectively connected to one end of the inductor L2 and the other end of the capacitor filter C1, the other end of the inductor L1 and the other end of the inductor L2 are respectively connected to the input end of the rectifier bridge, the output positive pole of the rectifier bridge is connected to the grounded capacitor filter C2, and the output negative pole of the rectifier bridge is connected to the grounded capacitor filter C3.

A detection method of a portable relay detector comprises the following steps:

Step 1: The embedded single-chip microcomputer is used to receive instructions from the host computer and send instructions to the actuator to execute the test logic;

Step 2, the embedded single chip microcomputer collects the contact states of multiple signal relays, and calculates the time to execute the action according to the change state signal of the contact state;

Step 3, the embedded single chip microcomputer outputs an analog signal to the programmable adjustable power supply to control the programmable power supply to output voltage and current that are compatible with various relays;

Step 4, the actuator executes the instruction of the embedded single chip microcomputer to switch the action of the signal relay;

Step 5: The sensor module transmits the collected signal of the signal relay to the host computer through the high-speed acquisition board. The host computer analyzes and calculates, outputs instructions, and returns to step 1.

The advantages and positive effects of the present invention are:

The present invention constructs a portable relay detector through a host computer, an embedded single-chip microcomputer, a sensor module, a bridge rectifier filter circuit, a signal relay, an execution structure and a programmable adjustable power supply. The voltage and current output are adjusted by the programmable power supply without manual voltage adjustment, which can effectively reduce human errors. The signal relay is detected by the sensor module to obtain the electrical characteristics of the signal relay. At the same time, the data can be transmitted to the host computer for storage. During the detection process, the bridge rectifier filter circuit is used to effectively avoid the adverse effects of the pulse of the input alternating current, thereby ensuring the accuracy of the measurement parameters and improving the measurement accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a structural diagram of the present invention;

FIG. 2 is a structural diagram of a bridge rectifier filter circuit of the present invention.

DETAILED DESCRIPTION

The present invention is further described in detail below with reference to the accompanying drawings.

A portable relay detector and a detection method thereof, as shown in FIG1, include a signal relay, an actuator, a programmable power supply, a sensor module, a host computer and an embedded single-chip microcomputer, wherein the signal relay is respectively connected to the sensor module and the embedded single-chip microcomputer, the sensor module is connected to the host computer, the host computer is connected to the embedded single-chip microcomputer, the embedded single-chip microcomputer is respectively connected to the programmable power supply and the actuator, the programmable power supply is connected to the actuator, and the actuator is connected to the signal relay.

The embedded single-chip microcomputer is used to receive the instructions from the host computer and send the instructions to the actuator to execute the test logic; the embedded single-chip microcomputer of the acquisition signal relay is used to receive the instructions from the host computer and send the instructions to the actuator to execute the test logic; The contact states of multiple signal relays are collected, and the time for executing the action is calculated according to the change state signal of the contact state; and an analog signal is output to the programmable adjustable power supply to control the programmable power supply to output voltage and current suitable for various relays; the actuator executes the instructions of the embedded single-chip microcomputer to switch the action of the signal relay; the signal relay is connected to the sensor module through a bridge rectifier filter circuit to provide a stable DC signal to the sensor module; the sensor module transmits the collected signal of the signal relay to the host computer through a high-speed acquisition board.

The actuator is connected to the signal relay and executes the instruction of the embedded single chip microcomputer to switch the action of the signal relay.

The sensor modules involved in this embodiment mainly include a voltage test module, a current test module, a resistance test module and an insulation test module; wherein the voltage test module includes a DC voltage test module and an AC voltage test module. The DC voltage test module has a range of 20V/200V/600V (automatically switching the range), with an accuracy of ±(0.2% of reading + 0.1% of full scale); the AC voltage test module has a range of 20V/200V/600V (automatically switching the range), with an accuracy of ±(0.5% of reading + 0.3% of full scale). Its main function is to test the rated voltage, magnetizing voltage, release voltage, working voltage, etc. of the signal relay, and transmit the voltage parameters to the embedded single-chip microcomputer.

The current test module includes a DC current test module and an AC current test module. The DC voltage test module has a range of 50mA/500mA/5A (automatic range switching) and an accuracy of ±(0.2% reading + 0.1% full scale); the AC voltage test module has a range of 50mA/500mA/5A (automatic range switching) and an accuracy of ±(0.5% reading + 0.3% full scale). Its main function is to test the rated current, magnetizing current, release current, working current, etc. of the signal relay, and transmit the current parameters to the embedded microcontroller.

Resistance detection module The resistance test module has a range of 20KΩ, an accuracy of 0.5% reading + 0.3% full scale (above 200mΩ), and 0.5% reading + 5mΩ (below 200mΩ). Its main function is to test the signal relay coil resistance and contact resistance, and transmit the resistance parameters to the embedded microcontroller.

The insulation test module has a range of 199.9MΩ and an accuracy of 2% reading + 1% full scale. It is mainly used to test the insulation resistance of the signal relay coil to ground, contact to ground, and coil to contact group, and transmit the insulation resistance parameters to the embedded single-chip microcomputer.

The voltage module model that can meet the above functions is: KX-DUS-94-S; the current module model is: KX-DIS-94-S; the resistance module model is: KX-LR-96-T; the insulation module model is: KX-HR2-96; the programmable power supply model is: DHS-11001; the actuator model is: SJ2S-05B, CJX2-0910.

As shown in FIG2 , the bridge rectifier filter circuit includes: an inductor L1, an inductor L2, a capacitor filter C1, a capacitor filter C2, a capacitor filter C3, and a rectifier bridge T. The positive pole of the AC input terminal is respectively connected to one end of the inductor L1 and one end of the capacitor filter C1, the negative pole of the AC input terminal is respectively connected to one end of the inductor L2 and the other end of the capacitor filter C1, the other end of the inductor L1 and the other end of the inductor L2 are respectively connected to the input end of the rectifier bridge, the output positive pole of the rectifier bridge is connected to the grounded capacitor filter C2, and the output negative pole of the rectifier bridge is connected to the grounded capacitor filter C3.

The present invention has the following functions:

1. Complete test varieties, including AX series relays, power panel series relays, totaling 38 varieties.

2. This tester is mainly used for electrical performance testing of railway signal relays. The main test items are: relay coil resistance, contact resistance, magnetization value, rated value, working value, release value, action time, insulation resistance and other electrical parameters.

Compared with the existing technology, this tester has the following characteristics:

1. There are many types of tests. The existing technology can only test DC voltage relays, while the present invention can automatically test DC voltage, DC current, AC voltage, and AC current relays.

2. Complete test functions, can automatically test the electrical characteristics of the relay.

3. The test speed is fast and the accuracy is high. It has two test modes: fast test and high-precision test.

4. The test process complies with national standards. When measuring the working value of the relay, the voltage or current value at both ends of the coil when the armature stopper is in contact with the iron core is the working value.

5. Simple operation and intuitive display. The operation mode adopts human-computer dialogue mode. The test function is displayed on the LCD screen in the form of Chinese character menu. The operator selects the test function according to the prompt on the screen. The test results are displayed on the LCD screen in a mixed form of Chinese characters, numbers and graphics. Unqualified test results are displayed in red, and the test results can be stored and printed.

6. It has perfect automatic protection and self-checking functions.

Relay model tested:

JPXC-1000

JWXC-2.3;7;370/480;500/H300;1000;1700;H310;H340;H600;H850;H1200

JWJXC-480; H120/0.17; H125/0.13; H125/0.44; H125/80

JYXC-270;660

JYJXC-135/220;

JWJXC-100;7200;JZJXC-100;7200;JWJXC-6800

JZXC-H18; H18F; H138; H142; H156; 480; 480F; 20000

JSBXC-780;820;850;JSDXC-850;JSBXC1-850

JDBXC-550/550; JDBXC-A550/550; JDBXC-1500

Use environment:

Ambient temperature: -10～+40℃

Relative humidity: 45% to 95%

Atmospheric pressure: 89～106Kpa

Environmental noise: ≤60Db

Technical parameters:

Working power supply: AC 220V ± 15% 50 ± 2Hz

AC voltage range: 0～19.999V/199.99V/600.0V

Accuracy: ±(0.5% reading + 0.3% full scale)

AC current range: 0～50.00mA/500.0mA/5.000A

Accuracy: ±(0.5% reading + 0.3% full scale)

DC voltage range: 0～19.999V/199.99V/600.0V

Accuracy: ±(0.2% reading + 0.1% full scale)

DC current range: 0～50.00mA/500.0mA/5.000A

Accuracy: ±(0.2% reading + 0.1% full scale)

Resistance range: 0～199.99mΩ/199.99Ω/19.999KΩ

Accuracy: 0.5% reading + 0.3% full scale (above 200mΩ)

0.5% reading + 5mΩ (below 200mΩ)

Insulation resistance range: 0～199.9MΩ(DC500V)

Accuracy: ±(2% reading +1% full scale)

Temperature range: -55℃～125℃

Accuracy: ±1℃

Action time: 0~300S

Accuracy: ±0.01S

Instrument dimensions: 66cm (length) × 55cm (width) × 33cm (height)

Instrument weight: 20Kg.

A detection method of a portable relay detector comprises the following steps:

Step 1: The embedded single-chip microcomputer is used to receive instructions from the host computer and send instructions to the actuator to execute the test logic;

Step 2, the embedded single chip microcomputer collects the contact states of multiple signal relays, and calculates the time to execute the action according to the change state signal of the contact state;

Step 3, the embedded single chip microcomputer outputs an analog signal to the programmable adjustable power supply to control the programmable power supply to output voltage and current that are compatible with various relays;

Step 4, the actuator executes the instruction of the embedded single chip microcomputer to switch the action of the signal relay;

Step 5: The sensor module transmits the collected signal of the signal relay to the host computer through the high-speed acquisition board. The host computer analyzes and calculates, outputs instructions, and returns to step 1.

It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention includes but is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims (5)

A portable relay detector is characterized by comprising a signal relay, an actuator, a programmable power supply, a sensor module, a host computer and an embedded single-chip microcomputer, wherein the signal relay is respectively connected to the sensor module and the embedded single-chip microcomputer, the sensor module is connected to the host computer, the host computer is connected to the embedded single-chip microcomputer, the embedded single-chip microcomputer is respectively connected to the programmable power supply and the actuator, the programmable power supply is connected to the actuator, and the actuator is connected to the signal relay. A portable relay tester according to claim 1, characterized in that: the embedded single-chip microcomputer is used to receive instructions from a host computer and send instructions to an actuator to execute test logic; collect contact states of multiple signal relays, and calculate the time to execute an action based on a state signal of the contact state change; and output an analog signal to a programmable adjustable power supply to control the programmable power supply to output voltage and current suitable for various relays; the actuator executes the instructions of the embedded single-chip microcomputer to switch the action of the signal relay; the signal relay is connected to the sensor module through a bridge rectifier and filter circuit to provide a stable DC signal to the sensor module; the sensor module transmits the collected signal of the signal relay to the host computer through a high-speed acquisition board. A portable relay detector according to claim 2, characterized in that: the sensor module includes a voltage test module, a current test module, a resistance test module and an insulation test module, wherein the voltage test module is used to test the rated voltage, magnetizing voltage, release voltage and working voltage of the signal relay; the current test module is used to test the rated current, magnetizing current, release current and working current of the signal relay; the resistance detection module is used to test the coil resistance and contact resistance of the signal relay; the insulation test module is used to test the insulation resistance of the signal relay coil to ground, contact to ground and coil to contact group. A portable relay detector according to claim 2, characterized in that: the signal relay is connected to the sensor module through a bridge rectifier filter circuit, wherein the bridge rectifier filter circuit includes an inductor L1, an inductor L2, a capacitor filter C1, a capacitor filter C2, a capacitor filter C3 and a rectifier bridge T, the positive pole of the AC input end is respectively connected to one end of the inductor L1 and one end of the capacitor filter C1, the negative pole of the AC input end is respectively connected to one end of the inductor L2 and the other end of the capacitor filter C1, the other end of the inductor L1 and the other end of the inductor L2 are respectively connected to the input end of the rectifier bridge, the output positive pole of the rectifier bridge is connected to the grounded capacitor filter C2, and the output negative pole of the rectifier bridge is connected to the grounded capacitor filter C3. A detection method of a portable relay detector according to any one of claims 1 to 4, characterized in that it comprises the following steps: Step 1: The embedded single-chip microcomputer is used to receive instructions from the host computer and send instructions to the actuator to execute the test logic; Step 2, the embedded single chip microcomputer collects the contact states of multiple signal relays, and calculates the time to execute the action according to the change state signal of the contact state; Step 3, the embedded single chip microcomputer outputs an analog signal to the programmable adjustable power supply to control the programmable power supply to output voltage and current that are compatible with various relays; Step 4, the actuator executes the instruction of the embedded single chip microcomputer to switch the action of the signal relay; Step 5: The sensor module transmits the collected signal of the signal relay to the host computer through the high-speed acquisition board. The host computer analyzes and calculates, outputs instructions, and returns to step 1.