Portable relay tester and testing method therefor

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

Portable relay detector and detection method thereof Technical Field

[0001] The invention belongs to the technical field of detection equipment, in particular to a portable relay detector and a detection method thereof. Background Art

[0002] Currently, domestic railway signal relay testing methods primarily rely on manual testing, which results in large errors and low efficiency. Another example is an "AX-type relay electrical characteristics test bench," which is limited to testing the electrical and timing characteristics of only eight relay types. Furthermore, when testing relay operating values, it cannot detect the closed state of the relay armature and only uses the coil voltage when the relay contacts are closed as the operating value. Such test results do not comply with national standards.

[0003] In the prior art, there are technologies for relay detection, such as the invention patent with patent number CN202122890296.7, which discloses a portable automatic relay tester, which mainly focuses on solving the problem of inconvenience in detecting train relays, especially the problem of being unable to obtain power, and the invention patent with patent number CN201721384399.3, which discloses a portable online relay tester, which mainly focuses on realizing real-time storage of the detection structure of the relay. Both patented technologies use commonly used single-chip microcomputer or host computer control, adjustable voltage, sensor module and other technologies to measure and collect parameters such as voltage, current, and contact resistance of the relay, and both achieve miniaturization and portability. However, they inevitably have some inevitable pulse voltages in the AC to DC process, because AC power often has some inevitable pulse voltages, resulting in unstable current and voltage in the DC power output of the rectifier bridge, which inevitably leads to poor accuracy and reduced precision of the measurement results.

[0004] Summary of the Invention

[0005] 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 further improve the accuracy and precision of the measurement parameters while meeting the requirements of portability.

[0006] The present invention solves the technical problem by adopting the following technical solutions:

[0007] A portable relay detector includes 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.

[0008] 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 based on 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 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.

[0009] Furthermore, the sensor module includes a voltage testing module, a current testing module, a resistance testing module, and an insulation testing module. The voltage testing module is used to test the rated voltage, magnetizing voltage, release voltage, and operating voltage of the signal relay; the current testing module is used to test the rated current, magnetizing current, release current, and operating 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 testing module is used to test the insulation resistance of the signal relay coil to ground, contact to ground, and coil to contact group.

[0010] 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.

[0011] A detection method for a portable relay detector comprises the following steps:

[0012] 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;

[0013] 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;

[0014] 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;

[0015] Step 4: The actuator executes the instruction of the embedded single chip microcomputer to switch the action of the signal relay;

[0016] Step 5: The sensor module transmits the collected signal from 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.

[0017] The advantages and positive effects of the present invention are:

[0018] 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, and manual voltage adjustment is unnecessary, 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

[0019] FIG1 is a structural diagram of the present invention;

[0020] FIG2 is a structural diagram of a bridge rectifier filter circuit of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings.

[0022] A portable relay detector and a detection method thereof, as shown in Figure 1, 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.

[0023] 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; the embedded single-chip microcomputer for collecting signal relays is used to receive instructions from the host computer and send instructions to the actuator to execute the test logic; the contact status of multiple signal relays is collected, and the time for executing the action is calculated according to the change status signal of the contact status; 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.

[0024] 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.

[0025] 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 (automatic range switching) and an accuracy of ±(0.2% reading + 0.1% full scale); the AC voltage test module has a range of 20V / 200V / 600V (automatic range switching) and an accuracy of ±(0.5% reading + 0.3% full scale). Its main function is to test the rated voltage, magnetizing voltage, release voltage, operating voltage, etc. of the signal relay, and transmit the voltage parameters to the embedded single-chip microcomputer.

[0026] 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 (auto-switching) with an accuracy of ±(0.2% of reading + 0.1% of full scale); the AC voltage test module has a range of 50mA / 500mA / 5A (auto-switching) with an accuracy of ±(0.5% of reading + 0.3% of full scale). It primarily tests the rated current, magnetizing current, release current, operating current, and other parameters of signal relays, and transmits the current parameters to the embedded microcontroller.

[0027] The resistance test module has a range of 20kΩ and an accuracy of 0.5% of reading + 0.3% of full scale (above 200mΩ) and 0.5% of reading + 5mΩ (below 200mΩ). It is primarily used to test signal relay coil and contact resistance and transmit the resistance parameters to the embedded microcontroller.

[0028] The insulation test module has a range of 199.9 MΩ and an accuracy of 2% of reading + 1% of full scale. It primarily tests the insulation resistance of signal relay coils to ground, contacts to ground, and coil-to-contact groups, and transmits the insulation resistance parameters to an embedded microcontroller.

[0029] The voltage module model that can meet the above functions is: KX-DUS-94-S; current module model: KX-DIS-94-S; resistance module model: KX-LR-96-T; insulation module model: KX-HR2-96; programmable power supply model: DHS-11001; actuator models: SJ2S-05B, CJX2-0910.

[0030] As shown in Figure 2, 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 connected to one end of the inductor L1 and one end of the capacitor filter C1, respectively, and the negative pole of the AC input end is connected to one end of the inductor L2 and the other end of the capacitor filter C1, respectively. The other end of the inductor L1 and the other end of the inductor L2 are connected to the input end of the rectifier bridge, respectively. 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.

[0031] The present invention has the following functions:

[0032] 1. Complete range of test products, including AX series relays and power panel series relays, totaling 38 varieties.

[0033] 2. This tester is mainly used for testing the electrical performance of railway signal relays. The main test items are: relay coil resistance, contact resistance, magnetization value, rated value, operating value, release value, operation time, insulation resistance and other electrical parameters.

[0034] Compared with existing technologies, this tester has the following features:

[0035] 1. There are many test types. The existing technology can only test DC voltage relays. The present invention can automatically test DC voltage, DC current, AC voltage, and AC current relays.

[0036] 2. Complete test functions, can automatically test the electrical characteristics of the relay.

[0037] 3. The test speed is fast and the accuracy is high, with two test modes: fast test and high-precision test.

[0038] 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 contacts the iron core is the working value.

[0039] 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 a Chinese character menu. The operator selects the test function according to the prompts 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. The test results can be stored and printed.

[0040] 6. It has perfect automatic protection and self-checking functions.

[0041] Relay model under test:

[0042] JPXC-1000

[0043] JWXC-2.3;7;370 / 480;500 / H300;1000;1700;H310;H340;H600;H850;H1200

[0044] JWJXC-480; H120 / 0.17; H125 / 0.13; H125 / 0.44; H125 / 80

[0045] JYXC-270;660

[0046] JYJXC-135 / 220;

[0047] JWJXC-100;7200;JZJXC-100;7200;JWJXC-6800

[0048] JZXC-H18; H18F; H138; H142; H156; 480; 480F; 20000

[0049] JSBXC-780;820;850;JSDXC-850;JSBXC1-850

[0050] JDBXC-550 / 550; JDBXC-A550 / 550; JDBXC-1500

[0051] Usage environment:

[0052] Ambient temperature: -10~+40℃

[0053] Relative humidity: 45% to 95%

[0054] Atmospheric pressure: 89~106Kpa

[0055] Ambient noise: ≤60db

[0056] Technical parameters:

[0057] Working power supply: AC 220V±15% 50±2Hz

[0058] AC voltage range: 0-19.999V / 199.99V / 600.0V

[0059] Accuracy: ±(0.5% reading +0.3% full scale)

[0060] AC current range: 0~50.00mA / 500.0mA / 5.000A

[0061] Accuracy: ±(0.5% reading +0.3% full scale)

[0062] DC voltage range: 0-19.999V / 199.99V / 600.0V

[0063] Accuracy: ±(0.2% reading + 0.1% full scale)

[0064] DC current range: 0~50.00mA / 500.0mA / 5.000A

[0065] Accuracy: ±(0.2% reading + 0.1% full scale)

[0066] Resistance range: 0-199.99mΩ / 199.99Ω / 19.999kΩ

[0067] Accuracy: 0.5% reading + 0.3% full scale (above 200mΩ)

[0068] 0.5% of reading + 5mΩ (below 200mΩ)

[0069] Insulation resistance range: 0 ~ 199.9MΩ (DC500V)

[0070] Accuracy: ±(2% reading +1% full scale)

[0071] Temperature range: -55℃~125℃

[0072] Accuracy: ±1℃

[0073] Action time: 0~300S

[0074] Accuracy: ±0.01S

[0075] Instrument dimensions: 66cm (length) × 55cm (width) × 33cm (height)

[0076] Instrument weight: 20Kg.

[0077] A detection method for a portable relay detector comprises the following steps:

[0078] 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;

[0079] 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;

[0080] 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;

[0081] Step 4: The actuator executes the instruction of the embedded single chip microcomputer to switch the action of the signal relay;

[0082] Step 5: The sensor module transmits the collected signal from 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.

[0083] 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 embodiments. Any other embodiments derived by those skilled in the art based on the technical solutions of the present invention also fall within the scope of protection of the present invention.

Claims

1. A portable relay detector, characterized in that: It includes 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.

2. 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 for executing an action based on a change state signal of the contact state; and output an analog signal to a programmable adjustable power supply to control the programmable power supply to output a voltage and current that is 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.

3. A portable relay tester 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.

4. A portable relay tester 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.

5. A detection method of a portable relay detector according to any one of claims 1 to 4, characterized in that: The following steps are involved: 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.

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