Static test control circuit of tramcar rim lubrication system

Abstract

The utility model relates to a rail electric wheel rim lubrication system static test control circuit comprising a power supply J1 used for providing a power supply; the switching power supply U1 is used for converting the power supply J1 into DC5V; a DC5V power supply filter circuit; the switching power supply U1 supplies power to the single chip microcomputer U2; the switching power supply U1 supplies power to the relay U3, the output end of the single-chip microcomputer U2 is connected with the input end of the relay U3, and the single-chip microcomputer U2 is used for controlling on or off of a normally open contact of the relay U3; and the single-chip microcomputer reset circuit can reset the single-chip microcomputer U2. The static test control circuit of the tramcar rim lubrication system mainly comprises an AC220V-to-DC5V power supply, a single-chip microcomputer system and a low-level triggered optocoupler isolation relay driving module, and is used for verifying the functions of the vehicle rim lubrication system and improving the test efficiency under the static condition of a vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of test and detection, in particular to a static test control circuit for a tram wheel rim lubrication system. Background Art

[0002] The wheel rim lubrication system is used in trams to reduce wear on the wheel rim and track. During operation, when the train speed is ≥5 km / h, the wheel rim lubrication system generates an injection pulse signal, spraying lubricating oil from the wheel rim lubrication tank through the pipeline to the bottom of the wheel rim.

[0003] During train manufacturing and commissioning, as well as during production and routine maintenance, static functional testing of the wheel rim lubrication system is required. Verifying wheel rim system functionality while the vehicle is stationary allows for quick and easy fault analysis and replacement. Traditional testing methods rely on manually closing and opening short-circuit switches, which is inefficient. Therefore, verifying wheel rim lubrication system functionality while the vehicle is running is time-consuming and inefficient.

[0004] Therefore, in order to solve the above-mentioned technical problems, a control system for static testing of tram wheel rim lubrication system is urgently needed. Utility Model Content

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that a manual operation method is used to perform a function test on the wheel rim lubrication system, which requires a certain amount of manpower and has low test efficiency.

[0006] In order to solve the above technical problems, the utility model provides a static test control circuit for a tram wheel rim lubrication system, comprising: a power supply J1, which is used to provide power; a switching power supply U1, whose power input end is connected to the power supply J1, and the switching power supply U1 is used to convert the power supply J1 into DC5V; a DC5V power supply filter circuit, which is connected to the output end of the switching power supply U1; a single-chip microcomputer U2, which is powered by the switching power supply U1; a relay U3, which is powered by the switching power supply U1, the output end of the single-chip microcomputer U2 is connected to the input end of the relay U3, and the single-chip microcomputer U2 is used to control the closing or opening of the normally open contact of the relay U3; a single-chip microcomputer reset circuit, which is connected to the reset pin of the single-chip microcomputer U2, and the single-chip microcomputer reset circuit can reset the single-chip microcomputer U2.

[0007] In one embodiment of the present invention, the power supply J1 adopts AC220V.

[0008] In one embodiment of the present invention, the DC5V power supply filter circuit includes a switch S1, a capacitor C1, a capacitor C2 and a light-emitting diode D1. The switch S1 is connected to the switching power supply U1, and the two ends of the capacitor C1, the capacitor C2 and the light-emitting diode D1 are connected in parallel to the switch S1 and the ground respectively.

[0009] In one embodiment of the present invention, the capacitance of the capacitor C1 is 100uF.

[0010] In one embodiment of the present invention, the capacitance of the capacitor C2 is 0.1 uF.

[0011] In one embodiment of the present invention, the single chip microcomputer U2 adopts STC89C51.

[0012] In one embodiment of the present invention, the power pin VCC of the microcontroller U2 is connected to +5V, and the power pin GND of the microcontroller U2 is grounded. An external capacitor C4 is connected between the power pins VCC and GND of the microcontroller U2, and the capacitance of the capacitor C4 is 0.1uF.

[0013] In one embodiment of the present invention, the external clock pin XTAL1 of the single-chip microcomputer U2 is connected to an external capacitor C5, and the external clock pin XTAL2 of the single-chip microcomputer U2 is connected to an external capacitor C6. The capacitance of the capacitor C5 and the capacitor C6 is 0.1uF. A crystal oscillator Y1 is connected in series between the branches of the capacitor C5 and the capacitor C6. The frequency of the crystal oscillator Y1 is 11.0592MHz.

[0014] In one embodiment of the present utility model, the microcontroller reset circuit includes a capacitor C3, a resistor R3, a resistor R2 and a push button switch K1. The resistor R2 and the push button switch K1 are connected in series and then connected in parallel with the capacitor C3. The first end of the resistor R3 is grounded, and the second end of the resistor R3 is connected in series to the intersection of the capacitor C3 and the resistor R2. The intersection of the capacitor C3 and the push button switch K1 is connected to a +5V power supply. The RST pin of the microcontroller U2 is connected to the intersection of the capacitor C3, the resistor R3, and the resistor R2.

[0015] In one embodiment of the present invention, the capacitance of the capacitor C3 is 0.1uF, and the resistance of the resistor R3 is 4.7K.

[0016] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0017] The static test control circuit of the tram wheel rim lubrication system described in the utility model mainly includes an AC220V to DC5V power supply, a single-chip computer system, and a low-level triggered optocoupler isolation relay driver module. It is used to verify the function of the vehicle wheel rim lubrication system when the vehicle is static, thereby improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on the specific embodiments of the utility model and in conjunction with the accompanying drawings, wherein

[0019] Figure 1 This is a circuit diagram of a single chip microcomputer and a relay in a preferred embodiment of the present utility model;

[0020] Figure 2 This is a circuit diagram of the power supply in the preferred embodiment of the utility model;

[0021] Figure 3 This is a circuit diagram of a single chip microcomputer reset circuit in a preferred embodiment of the present utility model.

[0022] Description of the accompanying drawings in the specification: power supply J1, switching power supply U1, single-chip microcomputer U2, relay U3, switch S1, capacitor C1, capacitor C2, light-emitting diode D1, capacitor C5, capacitor C6, capacitor C3, resistor R3, resistor R2, button switch K1. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0024] Reference Figure 1-3 As shown, the static test control circuit of the tram wheel rim lubrication system of the present invention includes: a power supply J1, which is used to provide power; a switching power supply U1, whose power input end is connected to the power supply J1, and the switching power supply U1 is used to convert the power supply J1 into DC5V; a DC5V power supply filter circuit, which is connected to the output end of the switching power supply U1; a single-chip microcomputer U2, which is powered by the switching power supply U1; a relay U3, which is powered by the switching power supply U1, the output end of the single-chip microcomputer U2 is connected to the input end of the relay U3, and the single-chip microcomputer U2 is used to control the closing or opening of the normally open contact of the relay U3; a single-chip microcomputer reset circuit, which is connected to the reset pin of the single-chip microcomputer U2, and the single-chip microcomputer reset circuit can reset the single-chip microcomputer U2.

[0025] The power supply J1 adopts AC220V.

[0026] In the above circuit, the DC5V power supply filter circuit includes switch S1, capacitor C1, capacitor C2, and light-emitting diode D1. Switch S1 is connected to switching power supply U1. The two ends of the parallel connection of capacitor C1, capacitor C2, and light-emitting diode D1 are connected to switch S1 and ground, respectively. The capacitance of capacitor C1 is 100uF. The capacitance of capacitor C2 is 0.1uF.

[0027] In the above circuit, the microcontroller U2 uses an STC89C51. The power pin VCC of the microcontroller U2 is connected to +5V, and the power pin GND of the microcontroller U2 is grounded. An external capacitor C4 with a capacitance of 0.1uF is connected between the power pins VCC and GND of the microcontroller U2. An external capacitor C5 is connected to the external clock pin XTAL1 of the microcontroller U2, and an external capacitor C6 with a capacitance of 0.1uF is connected to the external clock pin XTAL2 of the microcontroller U2. A crystal oscillator Y1 with a frequency of 11.0592MHz is connected in series between the branches of the capacitors C5 and C6.

[0028] In the above circuit, the microcontroller reset circuit includes capacitor C3, resistor R3, resistor R2, and pushbutton switch K1. Resistor R2 and pushbutton switch K1 are connected in series and then in parallel with capacitor C3. The first end of resistor R3 is grounded, and the second end of resistor R3 is connected in series to the intersection of capacitor C3 and resistor R2. The intersection of capacitor C3 and pushbutton switch K1 is connected to a +5V power supply. The RST pin of microcontroller U2 is connected to the intersection of capacitor C3, resistor R3, and resistor R2. The capacitance of capacitor C3 is 0.1uF, and the resistance of resistor R3 is 4.7K.

[0029] The principle of the static test control circuit of the tram wheel rim lubrication system of the present utility model is:

[0030] Use AC220V to power the power supply, and the AC220V to 5V switching power supply U1 is inverted into DC5V to power the microcontroller U2 and relay U3 respectively.

[0031] Based on the air compressor startup time and the wheel rim lubrication pulse signal duration, microcontroller U2 calculates a loop output duration of approximately 5 seconds of low-level output and 50 seconds of high-level output. A low-level output triggers a relay to energize, while a high-level output de-energizes the relay. The wheel rim lubrication pulse signal, connected to the tram vehicle's wheel rim lubrication system through the normally open contacts of relay U3, controls the wheel rim lubrication system's oil injection. A continuous low-level output for 5 seconds energizes the relay, closing the normally open contacts and initiating oil injection. A high-level output for 50 seconds de-energizes the relay, opening the normally open contacts and preventing oil injection. During this time, the vehicle's wheel rim lubrication system pressure falls below the set value, causing the air compressor to start. When the pressure reaches the threshold, the compressor stops. This cycle continues until the grease in the wheel rim lubrication tank is sprayed onto the bottom of the wheel rim.

[0032] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A static test control circuit for a tram wheel rim lubrication system, characterized by: include, Power supply J1, which is used to provide power; The switching power supply U1 has a power input terminal connected to the power supply J1, and the switching power supply U1 is used to convert the power supply J1 into DC5V; DC5V power supply filter circuit, which is connected to the output end of the switching power supply U1; The microcontroller U2 is powered by the switching power supply U1; The relay U3 is powered by the switching power supply U1. The output terminal of the single-chip microcomputer U2 is connected to the input terminal of the relay U3, and the single-chip microcomputer U2 is used to control the closing or opening of the normally open contact of the relay U3. The single-chip microcomputer reset circuit is connected to the reset pin of the single-chip microcomputer U2, and the single-chip microcomputer reset circuit can reset the single-chip microcomputer U2.

2. The static test control circuit of the tram wheel rim lubrication system according to claim 1, characterized in that: The power supply J1 adopts AC220V.

3. The static test control circuit of the tram wheel rim lubrication system according to claim 1, characterized in that: The DC5V power supply filter circuit includes a switch S1, a capacitor C1, a capacitor C2 and a light-emitting diode D1. The switch S1 is connected to the switching power supply U1. The two ends of the capacitor C1, the capacitor C2 and the light-emitting diode D1 are connected in parallel to the switch S1 and the ground respectively.

4. The static test control circuit of the tram wheel rim lubrication system according to claim 3, characterized in that: The capacitance of the capacitor C1 is 100uF.

5. The static test control circuit of the tram wheel rim lubrication system according to claim 4, characterized in that: The capacitance of the capacitor C2 is 0.1uF.

6. The static test control circuit of the tram wheel rim lubrication system according to claim 1, characterized in that: The single chip microcomputer U2 adopts STC89C51.

7. The static test control circuit of the tram wheel rim lubrication system according to claim 6, characterized in that: The power pin VCC of the microcontroller U2 is connected to +5V, and the power pin GND of the microcontroller U2 is grounded. An external capacitor C4 is connected between the power pins VCC and GND of the microcontroller U2, and the capacitance of the capacitor C4 is 0.1uF.

8. The static test control circuit of the tram wheel rim lubrication system according to claim 7, characterized in that: The external clock pin XTAL1 of the single-chip microcomputer U2 is connected to an external capacitor C5, and the external clock pin XTAL2 of the single-chip microcomputer U2 is connected to an external capacitor C6. The capacitance of the capacitor C5 and the capacitor C6 is 0.1uF. A crystal oscillator Y1 is connected in series between the branches of the capacitor C5 and the capacitor C6. The frequency of the crystal oscillator Y1 is 11.0592MHz.

9. The static test control circuit of the tram wheel rim lubrication system according to claim 6, characterized in that: The single-chip reset circuit includes a capacitor C3, a resistor R3, a resistor R2 and a push button switch K1. The resistor R2 and the push button switch K1 are connected in series and then in parallel with the capacitor C3. The first end of the resistor R3 is grounded, and the second end of the resistor R3 is connected in series to the intersection of the capacitor C3 and the resistor R2. The intersection of the capacitor C3 and the push button switch K1 is connected to a +5V power supply. The RST pin of the single-chip computer U2 is connected to the intersection of the capacitor C3, the resistor R3 and the resistor R2.

10. The static test control circuit of the tram wheel rim lubrication system according to claim 9, characterized in that: The capacitance of the capacitor C3 is 0.1uF, and the resistance of the resistor R3 is 4.7K.

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