CN211086522U - Intelligent comprehensive test platform for contactor - Google Patents

Abstract

The utility model discloses a contactor intelligence integrated test platform, including host computer and the next machine of being connected with the host computer, the next machine includes host computer, voltage regulator, voltmeter and 1 at least slave computer, and every slave computer corresponds sets up 1 middle contactor that is used for the contactor power supply that awaits measuring, host computer, voltage regulator, voltmeter and slave computer connect through communication bus, voltage regulator, voltmeter and middle contactor pass through the coil power supply line and connect, the slave computer passes through control signal output circuit and power break-make measuring circuit and links to each other with middle contactor, the slave computer passes through contact signal measuring circuit and links to each other with the contactor that awaits measuring. The system solves the defects of poor integration level and low automation degree of the existing contactor test equipment, measures a large number of contacts of a plurality of contactor equipment, facilitates the operation and maintenance of personnel, and can store test data to facilitate further analysis and use.

Description

Intelligent comprehensive test platform for contactor

Technical Field

The utility model relates to a test platform especially relates to a contactor intelligence integrated test platform.

Background

The contactor device is an essential element of rail transit equipment and is widely applied to high-speed railways, intercity rails, subway vehicles and the like; at present, the domestic contactor equipment test method still follows more traditional manual test methods, and meanwhile, a few manufacturers and stations such as Nanjing station railway administration, China Central plant continent locomotive research institute and the like adopt partial automatic test platforms to test the electrical performance of the contactor. However, the existing test platform has many disadvantages, such as insufficient automation degree, poor system integration degree, and low test efficiency.

Disclosure of Invention

The purpose of the invention is as follows: the to-be-solved technical problem of the utility model is to provide a contactor intelligence integrated test platform, solved not enough that present contactor test equipment integrated level is not good, degree of automation is not high, measure a large amount of contacts to many contactor equipment simultaneously, make things convenient for personnel's operation and maintenance to can preserve test data and be convenient for further analysis and use.

The technical scheme is as follows: contactor intelligence integrated test platform, including host computer and the next machine of being connected with the host computer, the next machine includes host computer, voltage regulator, voltmeter and 1 at least slave computer, and every slave computer corresponds and sets up 1 middle contactor that is used for the contactor power supply that awaits measuring, host computer, voltage regulator, voltmeter and slave computer connect through communication bus, voltage regulator, voltmeter and middle contactor pass through coil power supply line and connect, the slave computer passes through control signal output circuit and power break-make measuring circuit and links to each other with middle contactor, the slave computer passes through contact signal measuring circuit and links to each other with the contactor that awaits measuring.

Further, the communication bus is an RS485 communication bus.

Further, the upper computer and the host computer are connected through an RS 485-USB cable.

Furthermore, control signal OUTPUT circuit include opto-coupler, U L N2803 darlington pipe and relay, opto-coupler input end connection control signal OUTPUT, the OUTB0 port of U L N2803 darlington pipe is connected to the opto-coupler OUTPUT, the OUTPUT0 port of U L N2803 darlington pipe is connected the relay coil, the relay is connected intermediate contact ware.

Furthermore, the contact signal measuring circuit comprises a PC410 optocoupler, one end of a contact of the contactor to be measured is connected with a pin No. 3 at the left end of the PC410, one end of the contact is connected with a measuring ground, a pin No. 1 of the PC410 optocoupler is connected with a measuring power supply 24V through resistors R3 and R4 to form an isolation input end of the measuring circuit, a 24V voltage regulator tube PTZ24B is bridged between the middle of the resistors R3 and R4 and the pin No. 3 of the PC410, an isolation output end of the PC410 is opened to leak and output a pin No. 5 Vo to a +3.3V power supply through a pull-up resistor R2, the Vo is connected to a pin of a single chip microcomputer through a current limiting resistor R1, and the Vo is bridged with a 3.6V.

Has the advantages that: this platform has following advantage:

1. the distributed platform is adopted to test a plurality of contactor devices simultaneously, so that the measurement of a plurality of groups of contactor contacts is facilitated, the expansion of system functions and the maintenance of the system are facilitated, if new hardware functions are needed, new hardware devices can be directly mounted on a system bus, if a certain measuring unit fails, the measuring unit can be directly replaced, and the rapid repair can be realized;

2. the integration level and the automation of the complex test flow are improved, a tester can easily complete the whole test flow through the operation visual interface of the upper computer, the tester can complete the whole test flow by one key without facing complicated hardware matching equipment, and the full-automatic measurement of indexes such as pull-in voltage, release voltage, pull-in time, release time, contact jitter time, contact action time, alignment, contact resistance, aging test and the like can be completed without human intervention, so that the labor intensity and the professional skill requirements of the tester are reduced;

3. the test steps and the results are stored in files and data, the export is convenient, the operation interface provides abnormal test alarm, the functions are various and easy to use, and the analysis, prediction, statistics and mining of relevant big data can be realized in the subsequent statistical analysis.

Drawings

Fig. 1 is a system configuration diagram of the present embodiment;

FIG. 2 is a schematic diagram of an RS485 communication circuit;

FIG. 3 is a schematic diagram of a contact signal measurement circuit;

FIG. 4 is a schematic diagram of a power on/off measurement circuit;

FIG. 5 is a schematic diagram of a control signal output circuit;

FIG. 6 is a schematic view of a pull-in release voltage measurement process;

fig. 7 is a schematic view of a contact parameter measurement process.

Detailed Description

The structure of the embodiment of the platform is shown in fig. 1, and the platform comprises an upper computer and a lower computer connected with the upper computer, wherein the lower computer comprises a host, a voltage regulator, a voltmeter and a plurality of slave computers. Each slave machine can test a plurality of contactors to be tested, and 1 middle contactor for supplying power to the contactors to be tested is correspondingly arranged. The master machine, the voltage regulator, the voltmeter and the slave machine are connected through a communication bus, the voltage regulator, the voltmeter and the middle contactor are connected through a coil power supply line, the slave machine is connected with the middle contactor through a control signal output circuit and a power supply on-off measuring circuit, and the slave machine is connected with the contactor to be tested through a contact signal measuring circuit.

The host computer has contained operation interface's automation client promptly, and in the test procedure, the operator need not be faced loaded down with trivial details hardware corollary equipment, and whole test procedure can be accomplished to the one key, and the function diversification embodies in test data multidimension, and file and data are preserved in during test procedure and the result, conveniently derive, and operation interface provides the test and reports an emergency and asks for help or increased vigilance, and the function is various and easy-to-use. Inside the lower computer system, consider that operational environment is abominable, the interference is great, and has certain requirement to bus transmission distance, consequently selects the interference killing feature to be strong, and the RS485 bus that communication distance is far away is connected, and communication protocol uses the standard MODBUS agreement commonly used in the industry, further strengthens its reliability. The host is mainly responsible for realizing data exchange between the upper computer and the lower computer, managing the slave computers and related control and measurement equipment (such as a regulator and a voltmeter of the power supply voltage of a coil of the contactor to be measured). 485-USB cable connection is used between the host and the upper computer, the connection mode is convenient to connect, and the upper computer can easily write corresponding communication software. The slave computer is mainly responsible for realizing parameter measurement on a specific contactor to be measured and returning a measurement result to the host computer. Because the rated voltage of the coil of the contactor to be tested is high, the electrified instantaneous current is high, and the slave machine cannot directly drive the coil of the contactor to be tested, the driving capability of the slave machine is enhanced by the middle contactor. The slave machine can control whether the coil of the contactor to be tested is electrified or not by controlling the on-off of the middle contactor so as to cooperate with the test flow. The voltage regulator is used for regulating the power supply voltage of the coil of the contactor to be tested, and the host controls the coil to supply the voltage regulator through the 485 bus. The voltmeter is used for measuring the power supply voltage of the coil of the contactor, and the host machine reads the voltage value measured by the voltmeter through the 485 bus and then broadcasts and sends the voltage value to each slave machine.

Because the circuit working environment is severe, the impact of static electricity, thunder and lightning and external interference on the communication port caused by high voltage pulse needs to be considered, and in order to avoid the damage of the impact on the RS485 communication port, the circuit shown in figure 2 is designed to protect the RS485 chip. The GDT3 at the rightmost end of the graph 2 is a three-end ceramic discharge tube which can be instantly conducted to introduce lightning strike interference into the ground when lightning strike high-voltage interference is connected in series between RS485 buses, the PPTC1 and the PPTC2 are high-polymer self-recovery fuses and are used for limiting current on the buses, and the functions of the TVS1, TVS2 and TVS3 at the rear stage are similar to those of the GDT3 and are used for preventing the communication interface from being damaged by instant high voltage on the RS485 buses.

In the contact signal measuring circuit, one end of a contact is connected with a 24V terminal, the other end of the contact is connected with a high-speed optical coupler, and the high-speed optical coupler PC410 is used for isolating and level-converting an input signal. The contact signal measuring circuit is shown in fig. 3, one end of a contact of a contactor to be measured is connected with a pin No. 3 at the left end of a PC410, the other end of the contact is connected with a measuring ground, a pin No. 1 of the PC410 is connected with a measuring power supply 24V through R3 and R4 to form an isolation input end of the measuring circuit, and a 24V voltage regulator tube PTZ24B bridged between the middle of R3 and R4 and the pin No. 3 of the PC410 plays a role in restraining instant high voltage and protecting the circuit. The isolated output end of the PC410 is provided with a 5-pin Vo which is connected to a +3.3V power supply through a pull-up resistor R2, and the Vo is connected to a pin of the single chip microcomputer through a current limiting resistor R1. Vo and ground are connected with a 3.6V voltage regulator tube PDZ3.6 in a cross mode, so that instantaneous high voltage is inhibited, and pins of the single chip microcomputer are protected. The high-speed optical coupler is PC410, the baud rate of the high-speed optical coupler is up to 10Mbps, and the high-speed optical coupler completely meets the requirements of parameter measurement application of a contactor. When the contact is closed, a voltage is obtained between pins 1 and 3 at the right end of the PC410, the light emitting diode inside the PC410 emits light, and the open-drain output pin Vo at the right end of the PC is controlled to be conducted with GND, so that the level of the IO _ IN end is changed from high level to low level. Similarly, when the measuring contact is opened, Vo is disconnected from GND, and the IO _ IN end level is changed from low level to high level. By the method, the on-off state of the contact can be converted into an electric signal which can be represented by high and low levels. The D1 and D2 diodes in the circuit are 24V and 3.6V voltage stabilizing diodes respectively, and the functions of the diodes are to restrain instantaneous high voltage and protect an optical coupler and an IO port of the single chip microcomputer from being damaged by the instantaneous high voltage.

The power supply on-off measuring circuit is implemented by adopting a method for detecting the on-off of the auxiliary contact of the intermediate contactor, if the main contact and the auxiliary contact of the intermediate contactor are both normally open contacts, the on-off of the normally open auxiliary contact indicates that the power supply is switched on, and the off-off of the normally open auxiliary contact indicates that the power supply is switched off. The power on-off measuring circuit is shown in fig. 4, a main contact of the middle contactor is connected in series into a contactor coil power supply loop to control a coil to supply power, an auxiliary contact is connected into the contact on-off signal measuring circuit to judge the on-off condition of the power, and a contact of the contactor to be tested is also connected into the contact on-off signal measuring circuit to judge the on-off condition of the contact of the contactor to be tested.

The control signal OUTPUT circuit is shown in fig. 5, a pin 3 of a PC410 is directly connected with a control pin of a single chip microcomputer, the pin is connected with a 5V power supply through a R47 and a light emitting diode D30 to indicate an OUTPUT state of the OUTPUT circuit, a pin 1 of the PC410 is connected with the 5V power supply through a current limiting resistor R48, a Vo open-drain OUTPUT pin of the PC410 is connected with an OUTPUT power supply through a pull-up resistor R52, the Vo open-drain OUTPUT pin is directly connected with an input control pin of a U L N2803L to control a state of an OUTPUT pin of a corresponding U L N2803L, an OUTPUT pin of a U L N2803L is connected with one end of a coil of a relay to control a contact of the relay, a main contact of the relay is connected in series with a coil power supply circuit of an intermediate contactor to control on-off of the intermediate contactor, a subsequent contact connection mode is introduced in a power supply on-off measurement circuit, which a control signals are mainly used for controlling on-off of a normally-off driving a normally-on circuit of the intermediate contactor to-off contactor, thus enhancing a performance of a normally-on and a signal OUTPUT of a normally-off circuit of a normally-on-off circuit, a normally-on-off normally-off circuit, a normally-off normally-on-off circuit of a normally-off normally-on normally-off circuit, and a circuit, a circuit of a normally-off normally-on normally-off circuit, a circuit, and a circuit, a circuit.

The measuring process is divided into two parts of pull-in release voltage measurement and contact parameter measurement. The pull-in release voltage measurement process is shown in fig. 6, and the specific steps are as follows: (1) the host machine receives a command of measuring pull-in release voltage of the upper machine and returns the voltage of a power supply of a coil of the contactor to zero; (2) the host sends a pull-in release voltage test command to the slave, and the slave enters a corresponding state; (3) the host machine adjusts the voltage of a power supply of a coil of the contactor according to a measurement required voltage curve; (4) the host reads the measured value of the voltmeter and broadcasts the voltage value to the slave through a 485 bus; (5) the slave machine records a voltage value according to the contact actuation release state, and sets a measurement ending flag bit if actuation release voltages are all measured; (6) judging whether the voltage curve change is finished or not, if not, returning to the step (3), and if so, reading the ending zone bits of all the slave machines by the host; (7) the host reads the measurement result of the slave and processes the slave which is not normally measured; (8) the host returns the measured data to the upper computer.

The contact parameter measurement process is shown in fig. 7, and comprises the following specific steps: (1) the host computer receives a contact parameter measurement command of the upper computer and adjusts the voltage of a power supply of a coil of the contactor to a rated voltage; (2) the master machine sends a contact parameter measuring command to the slave machine, and the slave machine enters a corresponding state; (3) the slave machine controls the connection and disconnection of the coil power supply once, performs corresponding measurement, and sets a measurement flag bit; (4) the host reads the ending flag bits of all the slaves; (5) the host reads the measurement result of the slave and processes the slave which is not normally measured; (6) the host returns the measured data to the upper computer.

Claims (5)

1. The utility model provides a contactor intelligence integrated test platform which characterized in that: including host computer and the next computer of being connected with the host computer, the next computer includes host computer, voltage regulator, voltmeter and 1 at least slave computer, and every slave computer corresponds sets up 1 middle contactor that is used for the contactor power supply that awaits measuring, host computer, voltage regulator, voltmeter and slave computer are connected through communication bus, voltage regulator, voltmeter and middle contactor pass through the coil power supply line and connect, the slave computer links to each other with middle contactor through control signal output circuit and power break-make measuring circuit, the slave computer passes through contact signal measuring circuit and links to each other with the contactor that awaits measuring.

2. The intelligent integrated test platform for contactors of claim 1, characterized in that: the communication bus is an RS485 communication bus.

3. The intelligent integrated test platform for contactors of claim 2, characterized in that: the upper computer is connected with the host computer through an RS 485-USB cable.

4. The intelligent comprehensive test platform for the contactor according to claim 1, wherein the control signal OUTPUT circuit comprises an optical coupler, a U L N2803 Darlington tube and a relay, an input end of the optical coupler is connected with a control signal OUTPUT end, an OUTPUT end of the optical coupler is connected with an OUTB0 port of the U L N2803 Darlington tube, an OUTPUT0 port of the U L N2803 Darlington tube is connected with a relay coil, and the relay is connected with the middle contactor.

5. The intelligent integrated test platform for contactors of claim 1, characterized in that: the contact signal measuring circuit comprises a PC410 optocoupler, one end of a contact of a contactor to be measured is connected with a pin No. 3 at the left end of the PC410, and the other end of the contact is connected with a measuring ground, a pin No. 1 of the PC410 optocoupler is connected with a measuring power supply 24V through resistors R3 and R4 to form an isolation input end of the measuring circuit, a 24V voltage regulator PTZ24B is bridged between the middle of the resistors R3 and R4 and the pin No. 3 of the PC410, an isolation output end of the PC410 is opened, a pin No. 5 Vo is output, is connected to a +3.3V power supply through a pull-up resistor R2, is connected to a pin of a single chip microcomputer through a current limiting resistor R1, and is bridged with a 3.6.

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