Test circuit of whistle limiting controller

Abstract

The utility model discloses a test circuit of a whistle limiting controller, which comprises a power supply circuit, an industrial control screen circuit, an electric whistle rectifying circuit, a load circuit and a current acquisition card, and is characterized in that the power supply circuit supplies power to the industrial control screen circuit and the current acquisition card; a first control signal output end of the industrial control screen circuit is electrically connected with an acquisition input end of the current acquisition card through a tested device, and an acquisition output end of the current acquisition card is electrically connected with the tested device through the load circuit. A feedback end of the current acquisition card is electrically connected with a feedback receiving end of the industrial control screen circuit, each demand is controlled through the industrial control screen, when a control signal is output on the industrial control screen corresponding to the demand, a corresponding loop is conducted, a corresponding load is electrified, and at the moment, the current acquisition card acquires the state of the corresponding loop; and the collected information is fed back to the industrial control screen for display. The test circuit of the whistle limiting controller provided by the utility model has the effect of correspondingly testing each control requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of locomotive equipment, in particular to a test circuit of a horn limiting controller. Background Art

[0002] In order to warn pedestrians and workers on the track, an electric whistle and auxiliary lights need to be installed on the roof of the locomotive. Both the whistle and auxiliary lights are controlled by the operating console, but before installing the whistle and auxiliary lights, testing and debugging are required. Utility Model Content

[0003] In view of the above problems, a test circuit of a hum limiter controller is provided to solve the problems existing in the prior art.

[0004] The specific technical solutions are as follows:

[0005] A test circuit for a sound limiting controller includes a power supply circuit, an industrial control panel circuit, an electric whistle rectifier circuit, a load circuit, and a current acquisition card. The power supply circuit supplies power to the industrial control panel circuit and the current acquisition card. A first control signal output end of the industrial control panel circuit is electrically connected to an acquisition input end of the current acquisition card through a device under test. An acquisition output end of the current acquisition card is electrically connected to the device under test through the load circuit. A feedback end of the current acquisition card is electrically connected to a feedback receiving end of the industrial control panel circuit. A second control signal output end of the industrial control panel circuit is electrically connected to an input end of the electric whistle rectifier circuit. An output end of the electric whistle rectifier circuit is electrically connected to the device under test. Another output end of the electric whistle rectifier circuit passes through the current acquisition card and the load circuit in sequence and then returns to the electric whistle rectifier circuit to form a loop.

[0006] The test circuit of the above-mentioned sound limit controller also has the following characteristics: the power supply circuit includes a 24V power supply module and a 74V power supply module, both of which are powered by an external 220V power supply. The 24V power supply module is used to power the industrial control screen circuit and the current acquisition card, and the 74V power supply module is used to output the test voltage and power the device under test.

[0007] The test circuit of the above-mentioned sound limiting controller also has the following characteristics: the industrial control panel circuit includes an industrial control panel, a first control circuit, a second control circuit, a third control circuit, a fourth control circuit, an electric whistle control circuit and a main power supply control circuit; the voltage input terminals of the first control circuit, the second control circuit, the third control circuit and the fourth control circuit are all electrically connected to the output terminal of the 74V power supply module; the first control signal output terminal of the industrial control panel is electrically connected to the control signal input terminal of the first control circuit; the control signal output terminal of the first control circuit is electrically connected to the corresponding input terminal of the device under test; the second control signal output terminal of the industrial control panel is electrically connected to the control signal input terminal of the second control circuit; the control signal output terminal of the second control circuit is electrically connected to the corresponding input terminal of the device under test The third control signal output terminal of the industrial control panel is electrically connected to the control signal input terminal of the third control circuit, the control signal output terminal of the third control circuit is electrically connected to the corresponding input terminal of the device under test, the fourth control signal output terminal of the industrial control panel is electrically connected to the control signal input terminal of the fourth control circuit, the control signal output terminal of the fourth control circuit is electrically connected to the corresponding input terminal of the device under test, the electric flute control signal output terminal of the industrial control panel is electrically connected to the control signal input terminal of the electric flute control circuit, the control signal output terminal of the electric flute control circuit is electrically connected to the corresponding input terminal of the device under test, the main power control terminal of the industrial control panel is electrically connected to the input terminal of the main power control circuit, and the two control terminals of the main power control circuit are respectively electrically connected to the two control terminals of the 74V power supply module.

[0008] The test circuit of the above-mentioned hum limiter controller also has the following characteristics: the load circuit includes resistors R6, R5, R4, R7, R9 and R8. The resistors R6 and R5 form a first group, and the two are connected in series to form a first load module. The input end of the first load module is electrically connected to the first output end of the current acquisition card, and the output end of the first load module is electrically connected to the corresponding terminal of the device under test. The resistors R4 and R7 form a second group, and the two are connected in series to form a second load module. The input end of the second load module is electrically connected to the second output end of the current acquisition card, and the output end of the second load module is electrically connected to the corresponding terminal of the device under test. The resistors R9 and R8 form a third group, and the two are connected in parallel to form a third load module. The input end of the third load module is electrically connected to the third output end of the current acquisition card, and the output end of the third load module is electrically connected to the feedback end of the electric flute rectifier circuit.

[0009] The test circuit of the above-mentioned hum limiter controller also has the following characteristics: the electric flute rectifier circuit includes a rectifier bridge U13, a capacitor C1, a capacitor C2 and a capacitor C3. The AC input end of the rectifier bridge U13 is electrically connected to the output end of the electric flute control circuit, and the AC input end of the rectifier bridge U13 is also electrically connected to its positive output end. The negative output end of the rectifier bridge U13 is electrically connected to its DC output end through the capacitor C1. The capacitor C2 and the capacitor C3 are both connected in parallel to both ends of the capacitor C1. The negative output end of the rectifier bridge U13 is also electrically connected to the third input end of the current acquisition card, and the third output end of the current acquisition card is electrically connected to the DC output end of the rectifier bridge U13 through the third load module.

[0010] In summary, the beneficial effects of this solution are:

[0011] In the test circuit of the hum limiter controller provided by this utility model, each requirement is controlled by the industrial control screen. When the industrial control screen outputs a control signal corresponding to the requirement, the corresponding circuit is connected and the corresponding load is energized. At this time, the current acquisition card collects the status of the corresponding circuit and feeds the collected information back to the industrial control screen for display. The test circuit of the hum limiter controller provided by this utility model has the effect of correspondingly testing each control requirement. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a circuit block diagram of the test circuit of the hum limit controller of the present utility model;

[0013] Figure 2 This is a specific circuit structure diagram of the test circuit of the hum limit controller of the utility model. DETAILED DESCRIPTION

[0014] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0015] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0016] The present invention will be further described below with reference to specific embodiments, but this is not intended to limit the present invention.

[0017] Figure 1 This is a circuit block diagram of the test circuit of the hum limit controller of the utility model. Figure 2 The specific circuit structure diagram of the test circuit of the hum limit controller of the utility model is as follows: Figure 1 and Figure 2 As shown, the test circuit of the hum limit controller provided in this embodiment includes: a power supply circuit, an industrial control panel circuit, an electric whistle rectifier circuit, a load circuit and a current acquisition card. The power supply circuit supplies power to the industrial control panel circuit and the current acquisition card. The first control signal output end of the industrial control panel circuit is electrically connected to an acquisition input end of the current acquisition card through the device under test. One acquisition output end of the current acquisition card is electrically connected to the device under test through the load circuit. The feedback end of the current acquisition card is electrically connected to the feedback receiving end of the industrial control panel circuit. The second control signal output end of the industrial control panel circuit is electrically connected to the input end of the electric whistle rectifier circuit. One output end of the electric whistle rectifier circuit is electrically connected to the device under test. The other output end of the electric whistle rectifier circuit passes through the current acquisition card and the load circuit in sequence and then returns to the electric whistle rectifier circuit to form a loop.

[0018] In the above embodiment, the power supply circuit includes a 24V power supply module and a 74V power supply module. Both the 24V power supply module and the 74V power supply module are powered by an external 220V power supply. The 24V power supply module is used to power the industrial control screen circuit and the current acquisition card, and the 74V power supply module is used to output the test voltage and power the device under test.

[0019] In the above embodiment, the industrial control screen circuit includes an industrial control screen, a first control circuit, a second control circuit, a third control circuit, a fourth control circuit, an electric flute control circuit and a main power supply control circuit. The voltage input terminals of the first control circuit, the second control circuit, the third control circuit and the fourth control circuit are all electrically connected to the output terminal of the 74V power supply module. The first control signal output terminal of the industrial control screen is electrically connected to the control signal input terminal of the first control circuit, the control signal output terminal of the first control circuit is electrically connected to the corresponding input terminal of the device under test, the second control signal output terminal of the industrial control screen is electrically connected to the control signal input terminal of the second control circuit, the control signal output terminal of the second control circuit is electrically connected to the corresponding input terminal of the device under test, and the industrial control screen The third control signal output terminal of the industrial control panel is electrically connected to the control signal input terminal of the third control circuit, the control signal output terminal of the third control circuit is electrically connected to the corresponding input terminal of the device under test, the fourth control signal output terminal of the industrial control panel is electrically connected to the control signal input terminal of the fourth control circuit, the control signal output terminal of the fourth control circuit is electrically connected to the corresponding input terminal of the device under test, the electric flute control signal output terminal of the industrial control panel is electrically connected to the control signal input terminal of the electric flute control circuit, the control signal output terminal of the electric flute control circuit is electrically connected to the corresponding input terminal of the device under test, the main power control terminal of the industrial control panel is electrically connected to the input terminal of the main power control circuit, and the two control terminals of the main power control circuit are respectively electrically connected to the two control terminals of the 74V power supply module.

[0020] It should be noted that the first control circuit, the second control circuit, the third control circuit, the fourth control circuit, the electric flute control circuit and the main power supply control circuit are all controlled by relays. Taking the first control circuit as an example, the first control circuit includes a first relay, one end of the coil of the first relay is electrically connected to the first control signal output end of the industrial control panel, the other end of the coil of the first relay is grounded, the common end of the first relay is connected to the 74V power supply module, the normally closed end of the first relay is unconnected, and the normally open end of the first relay is electrically connected to the C end of the device under test.

[0021] In the above embodiment, the load circuit includes resistor R6, resistor R5, resistor R4, resistor R7, resistor R9 and resistor R8. Resistor R6 and resistor R5 form a first group, and the two are connected in series to form a first load module. The input end of the first load module is electrically connected to the first output end of the current acquisition card, and the output end of the first load module is electrically connected to the corresponding terminal of the device under test. Resistor R4 and resistor R7 form a second group, and the two are connected in series to form a second load module. The input end of the second load module is electrically connected to the second output end of the current acquisition card, and the output end of the second load module is electrically connected to the corresponding terminal of the device under test. Resistor R9 and resistor R8 form a third group, and the two are connected in parallel to form a third load module. The input end of the third load module is electrically connected to the third output end of the current acquisition card, and the output end of the third load module is electrically connected to the feedback end of the electric flute rectifier circuit.

[0022] It should be noted that the first load module and the second load module are used to replace the auxiliary lights, and the third load module is used to replace the electric horn.

[0023] In the above embodiment, the electric flute rectifier circuit includes a rectifier bridge U13, a capacitor C1, a capacitor C2 and a capacitor C3. The AC input end of the rectifier bridge U13 is electrically connected to the output end of the electric flute control circuit, and the AC input end of the rectifier bridge U13 is also electrically connected to its positive output end. The negative output end of the rectifier bridge U13 is electrically connected to its DC output end through the capacitor C1. The capacitors C2 and C3 are both connected in parallel to both ends of the capacitor C1. The negative output end of the rectifier bridge U13 is also electrically connected to the third input end of the current acquisition card, and the third output end of the current acquisition card is electrically connected to the DC output end of the rectifier bridge U13 through the third load module.

[0024] Working principle: When in use, turn on the 24V power supply module, the industrial control screen lights up, click power on, the 74V-A terminal and the 74V-B terminal of the 74V power supply module are connected, and the 74V power supply module outputs 74V voltage. The screen displays three currents of the long end, short end and electric whistle respectively. The long and short ends flash and are always on interlocked. Press the corresponding requirement to perform the test. For example, when it is necessary to test the long end flashing requirement, press the long end flashing on the industrial control screen, the coil of the first relay is energized, so that the normally open end of the first relay is closed, and the 74V voltage is output to the C terminal of the device under test. The J terminal of the device under test outputs a signal to the current acquisition card. Terminal 25 of the current acquisition card is electrically connected to the K terminal of the device under test after passing through the first load module to form a loop. At this time, the current acquisition card can collect the corresponding current. The current acquisition card feeds back the collected signal to the industrial control screen through the 485 communication circuit, and the test of the corresponding requirement is completed.

[0025] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of the present invention specification should be included in the protection scope of the present invention.

Claims

1. A test circuit for a hum limit controller, characterized in that: The device comprises a power supply circuit, an industrial control panel circuit, an electric flute rectifier circuit, a load circuit and a current acquisition card. The power supply circuit supplies power to the industrial control panel circuit and the current acquisition card. A first control signal output end of the industrial control panel circuit is electrically connected to an acquisition input end of the current acquisition card through the device under test. An acquisition output end of the current acquisition card is electrically connected to the device under test through the load circuit. A feedback end of the current acquisition card is electrically connected to a feedback receiving end of the industrial control panel circuit. A second control signal output end of the industrial control panel circuit is electrically connected to an input end of the electric flute rectifier circuit. An output end of the electric flute rectifier circuit is electrically connected to the device under test. Another output end of the electric flute rectifier circuit passes through the current acquisition card and the load circuit in sequence and then returns to the electric flute rectifier circuit to form a loop.

2. The test circuit of the hum limit controller according to claim 1, characterized in that: The power supply circuit includes a 24V power supply module and a 74V power supply module. Both the 24V power supply module and the 74V power supply module are powered by an external 220V power supply. The 24V power supply module is used to power the industrial control screen circuit and the current acquisition card, and the 74V power supply module is used to output the test voltage and power the device under test.

3. The test circuit of the hum limit controller according to claim 2, characterized in that: The industrial control screen circuit includes an industrial control screen, a first control circuit, a second control circuit, a third control circuit, a fourth control circuit, an electric flute control circuit and a main power supply control circuit. The voltage input terminals of the first control circuit, the second control circuit, the third control circuit and the fourth control circuit are all electrically connected to the output terminal of the 74V power supply module. The first control signal output terminal of the industrial control screen is electrically connected to the control signal input terminal of the first control circuit. The control signal output terminal of the first control circuit is electrically connected to the corresponding input terminal of the device under test. The second control signal output terminal of the industrial control screen is electrically connected to the control signal input terminal of the second control circuit. The control signal output terminal of the second control circuit is electrically connected to the corresponding input terminal of the device under test. The third control signal output terminal of the industrial control screen is electrically connected to the control signal input terminal of the second control circuit. The signal output terminal of the industrial control panel is electrically connected to the control signal input terminal of the third control circuit, the control signal output terminal of the third control circuit is electrically connected to the corresponding input terminal of the device under test, the fourth control signal output terminal of the industrial control panel is electrically connected to the control signal input terminal of the fourth control circuit, the control signal output terminal of the fourth control circuit is electrically connected to the corresponding input terminal of the device under test, the electric flute control signal output terminal of the industrial control panel is electrically connected to the control signal input terminal of the electric flute control circuit, the control signal output terminal of the electric flute control circuit is electrically connected to the corresponding input terminal of the device under test, the main power control terminal of the industrial control panel is electrically connected to the input terminal of the main power control circuit, and the two control terminals of the main power control circuit are respectively electrically connected to the two control terminals of the 74V power supply module.

4. The test circuit of the hum limit controller according to claim 3, characterized in that: The load circuit includes resistor R6, resistor R5, resistor R4, resistor R7, resistor R9 and resistor R8. The resistor R6 and resistor R5 form a first group, and the two are connected in series to form a first load module. The input end of the first load module is electrically connected to the first output end of the current acquisition card, and the output end of the first load module is electrically connected to the corresponding terminal of the device under test. The resistor R4 and resistor R7 form a second group, and the two are connected in series to form a second load module. The input end of the second load module is electrically connected to the second output end of the current acquisition card, and the output end of the second load module is electrically connected to the corresponding terminal of the device under test. The resistor R9 and resistor R8 form a third group, and the two are connected in parallel to form a third load module. The input end of the third load module is electrically connected to the third output end of the current acquisition card, and the output end of the third load module is electrically connected to the feedback end of the electric flute rectifier circuit.

5. The test circuit of the hum limit controller according to claim 4, characterized in that: The electric flute rectifier circuit includes a rectifier bridge U13, a capacitor C1, a capacitor C2 and a capacitor C3. The AC input end of the rectifier bridge U13 is electrically connected to the output end of the electric flute control circuit. The AC input end of the rectifier bridge U13 is also electrically connected to its positive output end. The negative output end of the rectifier bridge U13 is electrically connected to its DC output end through the capacitor C1. The capacitor C2 and the capacitor C3 are both connected in parallel to both ends of the capacitor C1. The negative output end of the rectifier bridge U13 is also electrically connected to the third input end of the current acquisition card. The third output end of the current acquisition card is electrically connected to the DC output end of the rectifier bridge U13 through the third load module.

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