A locomotive component testing device

Abstract

The present invention discloses a locomotive component testing device, which includes a control module, a signal output module and a signal detection module; the control module includes a control signal output terminal and a detection signal receiving terminal, the signal output module includes a control signal receiving terminal and a test signal output terminal, and the signal detection module includes a feedback signal receiving terminal and a detection signal output terminal; wherein, the control signal output terminal is electrically connected to the control signal receiving terminal, the test signal output terminal is electrically connected to the signal input end of the locomotive component to be tested, the feedback signal receiving terminal is electrically connected to the signal output end of the locomotive component to be tested, and the detection signal output terminal is electrically connected to the detection signal receiving terminal; the locomotive component to be tested includes at least one of a speed sensor, a tachogenerator, a digital-to-analog conversion box and a speed display instrument provided on the locomotive. The locomotive component testing device provided by the present invention improves the maintenance efficiency.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of testing, and particularly to a locomotive component testing device. Background Art

[0002] With the development of railway construction in China, the number of locomotives in use has increased sharply, and the real-time detection of locomotive speed plays a crucial role. Therefore, during the operation of a locomotive, it is necessary to detect and display the locomotive speed, motor speed, etc. in real time. Different types of locomotives may have different ways and components for speed detection. The same locomotive maintenance unit needs to undertake the maintenance of different types of locomotives. Currently, the detection of locomotive speed sensors, digital-to-analog boxes, tachogenerators, and speed gauges mostly uses different detection devices, resulting in a large workload and long detection time, making it difficult to meet the requirements of industrialized and automated detection. Summary of the Invention

[0003] The present invention provides a locomotive component testing device to improve the maintenance efficiency.

[0004] The embodiments of the present invention provide a locomotive component testing device, including a control module, a signal output module, and a signal detection module; the control module includes a control signal output terminal and a detection signal receiving terminal, the signal output module includes a control signal receiving terminal and a test signal output terminal, and the signal detection module includes a feedback signal receiving terminal and a detection signal output terminal;

[0005] Wherein, the control signal output terminal is electrically connected to the control signal receiving terminal, the test signal output terminal is electrically connected to the signal input end of the locomotive component to be tested, the feedback signal receiving terminal is electrically connected to the signal output end of the locomotive component to be tested, and the detection signal output terminal is electrically connected to the detection signal receiving terminal;

[0006] The locomotive component to be tested includes at least one of a speed sensor, a tachogenerator, a digital-to-analog conversion box, and a speed display instrument provided on the locomotive.

[0007] Optionally, the locomotive component testing device provided by the embodiments of the present invention further includes a drive module, and the drive module includes a pulse test signal receiving terminal;

[0008] The signal output module includes a pulse signal generating unit; the pulse signal generating unit includes a first control signal receiving terminal and a pulse test signal output terminal, the control signal output terminal includes a first control signal output terminal, and the first control signal receiving terminal is electrically connected to the first control signal output terminal; the pulse test signal output terminal is electrically connected to the pulse test signal receiving terminal;

[0009] The driving module is connected to the locomotive component to be tested, and the driving module is used to drive the locomotive component to be tested to rotate.

[0010] Optionally, the signal detection module includes a DC voltage detection unit and a pulse signal detection unit; the locomotive component to be tested includes a speed sensor;

[0011] The DC voltage detection unit includes a first feedback signal receiving terminal and a DC voltage detection signal output terminal; the pulse signal detection unit includes a second feedback signal receiving terminal and a pulse detection signal output terminal; the detection signal receiving terminal also includes a DC voltage detection signal receiving terminal and a pulse detection signal receiving terminal; the first feedback signal receiving terminal and the second feedback signal receiving terminal are both electrically connected to the signal output end of the speed sensor, the DC voltage detection signal output terminal is electrically connected to the DC voltage detection signal receiving terminal, and the pulse detection signal output terminal is electrically connected to the pulse detection signal receiving terminal;

[0012] The control module is used to obtain a first detection result of the speed sensor according to the DC voltage detection signal and the pulse detection signal.

[0013] Optionally, the first detection result includes one or more of high-level amplitude, low-level amplitude, duty cycle, phase difference, and number of pulses per revolution.

[0014] Optionally, the signal detection module includes an AC voltage detection unit; the locomotive component to be tested includes a tachogenerator;

[0015] The AC voltage detection unit includes a third feedback signal receiving terminal and an AC voltage detection signal output terminal, the control signal receiving terminal also includes an AC voltage detection signal receiving terminal, the third feedback signal receiving terminal is electrically connected to the signal output end of the tachogenerator, and the AC voltage detection signal output terminal is electrically connected to the AC voltage detection signal receiving terminal;

[0016] The control module is used to obtain a second detection result of the tachogenerator according to the AC voltage detection signal.

[0017] Optionally, the driving module includes a servo motor driver and a servo motor;

[0018] The servo motor driver is electrically connected to the servo motor and is used to control the rotation of the servo motor;

[0019] The servo motor is connected to the locomotive component to be tested and is used to drive the locomotive component to be tested to rotate.

[0020] Optionally, the signal output module includes a pulse signal generating unit; the locomotive component to be measured includes a digital-to-analog conversion box;

[0021] The pulse signal generating unit includes a first control signal receiving terminal and a pulse test signal output terminal, the control signal output terminal includes a first control signal output terminal, and the first control signal receiving terminal is electrically connected to the first control signal output terminal; the pulse test signal output terminal is electrically connected to the signal input terminal of the digital-to-analog conversion box;

[0022] The signal detection module includes a DC current detection unit, the DC current detection unit includes a fourth feedback signal receiving terminal and a DC current detection signal output terminal, the detection signal receiving terminal also includes a DC current detection signal receiving terminal, the fourth feedback signal receiving terminal is electrically connected to the signal output terminal of the digital-to-analog conversion box, and the DC current detection signal output terminal is electrically connected to the DC current detection signal receiving terminal;

[0023] The control module is used to obtain the third detection result of the digital-to-analog conversion box according to the DC detection signal.

[0024] Optionally, the signal output module includes a current signal generating unit; the locomotive component to be measured includes a speed display instrument;

[0025] The current signal generating unit includes a second control signal receiving terminal and a current test signal output terminal, the control signal output terminal includes a second control signal output terminal, and the second control signal receiving terminal is electrically connected to the second control signal output terminal; the current test signal output terminal is electrically connected to the signal input terminal of the speed display instrument.

[0026] Optionally, the control module includes an industrial control computer and an intelligent control unit;

[0027] The industrial control computer includes a test command output terminal and a measurement signal receiving terminal, the intelligent control unit includes a test command receiving terminal and a measurement signal output terminal, the test command output terminal is electrically connected to the test command receiving terminal, and the measurement signal receiving terminal is electrically connected to the measurement signal output terminal.

[0028] Optionally, the intelligent control unit includes an analog-to-digital converter;

[0029] The analog-to-digital converter is electrically connected to the detection signal output terminal, and the analog-to-digital converter is used to convert the detection signal output by the signal detection module into a digital signal.

[0030] The locomotive component testing device provided by the embodiment of the present invention is applicable to the maintenance and performance testing of locomotive components such as speed sensors, tachogenerators, digital-to-analog conversion boxes, and speed display instruments. According to different locomotive components, the control module controls the signal output module to output different test signals. The signal detection module detects the signals output by the locomotive component to be tested and transmits the detected signals to the control module for processing and display, thereby respectively completing the performance detection of different locomotive components. The locomotive component testing device provided by the embodiment of the present invention adopts a modular design, meets the requirements of industrial production, has a simple structure and is easy to use, and minimizes the labor intensity of operators and improves the maintenance efficiency of locomotives. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of a locomotive component testing device provided by an embodiment of the present invention;

[0032] Figure 2 It is a schematic structural diagram of another locomotive component testing device provided by an embodiment of the present invention;

[0033] Figure 3 It is a schematic structural diagram of yet another locomotive component testing device provided by an embodiment of the present invention;

[0034] Figure 4 It is a schematic structural diagram of yet another locomotive component testing device provided by an embodiment of the present invention;

[0035] Figure 5 It is a schematic structural diagram of yet another locomotive component testing device provided by an embodiment of the present invention;

[0036] Figure 6 It is a schematic structural diagram of yet another locomotive component testing device provided by an embodiment of the present invention;

[0037] Figure 7 It is a schematic structural diagram of yet another locomotive component testing device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present invention and not for limiting the present invention. Additionally, it should be noted that for the sake of convenience of description, only parts related to the present invention are shown in the drawings rather than all structures.

[0039] Figure 1 It is a schematic structural diagram of a locomotive component testing device provided by an embodiment of the present invention, as Figure 1As shown in the figure, the locomotive component testing device provided by the embodiment of the present invention includes a control module 11, a signal output module 12, and a signal detection module 13. The control module 11 includes a control signal output terminal 21 and a detection signal receiving terminal 22. The signal output module 12 includes a control signal receiving terminal 31 and a test signal output terminal 32. The signal detection module 13 includes a feedback signal receiving terminal 41 and a detection signal output terminal 42. Among them, the control signal output terminal 21 is electrically connected to the control signal receiving terminal 31. The test signal output terminal 32 is electrically connected to the signal input end 51 of the locomotive component 14 to be tested. The feedback signal receiving terminal 41 is electrically connected to the signal output end 52 of the locomotive component 14 to be tested. The detection signal output terminal 42 is electrically connected to the detection signal receiving terminal 22. The locomotive component 14 to be tested includes at least one of a speed sensor, a tachogenerator, a digital-to-analog conversion box, and a speed display instrument provided on the locomotive.

[0040] Specifically, as Figure 1 shown in the figure, the control module 11 is electrically connected to the signal output module 12. The control module 11 is used to output a control signal to the signal output module 12. The signal output module 12 outputs a test signal to the locomotive component 14 to be tested according to the control signal. The signal detection module 13 is electrically connected to the signal output end 52 of the locomotive component 14 to be tested. The signal detection module 13 detects the signal output by the locomotive component 14 to be tested, and transmits the detection signal to the control module 11 for processing and display, so as to complete the test of the locomotive component 14 to be tested.

[0041] The locomotive component testing device provided by the embodiment of the present invention is applicable to the maintenance and performance testing of locomotive components such as speed sensors, tachogenerators, digital-to-analog conversion boxes, and speed display instruments. According to different locomotive components, the control module 11 controls the signal output module 12 to output different test signals. The signal detection module 13 detects the signals output by the locomotive components 14 to be tested, and transmits the detection signals to the control module 11 for processing and display, so as to complete the performance detection of different locomotive components respectively. The locomotive component testing device provided by the embodiment of the present invention adopts a modular design, meets the requirements of industrial production, has a simple structure and is easy to use, and minimizes the labor intensity of operators and improves the maintenance efficiency of locomotives.

[0042] Figure 2 It is a structural schematic diagram of another locomotive component testing device provided by the embodiment of the present invention. As Figure 2As described above, optionally, the locomotive component testing device provided by an embodiment of the present invention further includes a driving module 15, and the driving module 15 includes a pulse test signal receiving terminal 61. The signal output module 12 includes a pulse signal generating unit 121, and the pulse signal generating unit 121 includes a first control signal receiving terminal 311 and a pulse test signal output terminal 321. The control signal output terminal 21 includes a first control signal output terminal 211. The first control signal receiving terminal 311 and the first control signal output terminal 211 are electrically connected. The pulse test signal output terminal 321 is electrically connected to the pulse test signal receiving terminal 61. The driving module 15 is connected to the locomotive component 14 to be tested, and the driving module 15 is used to drive the locomotive component 14 to be tested to rotate.

[0043] Among them, the control module 11 sends a first control signal to the pulse signal generating unit 121. The pulse signal generating unit 121 sends a pulse test signal to the driving module 15 according to the first control signal to control the driving module 15 to rotate. The driving module 15 drives the locomotive component 14 to be tested to rotate, thereby completing the test of the locomotive component 14 to be tested. Exemplarily, by setting the simulated locomotive speed through the control module 11, the control module 11 sends a first control signal to the pulse signal generating unit 121 according to the set simulated locomotive speed, so as to control the pulse signal generating unit 121 to send a pulse test signal with a frequency corresponding to the simulated locomotive speed to the driving module 15. The driving module 15 receives the pulse test signal with a frequency corresponding to the simulated locomotive speed and rotates according to the simulated locomotive speed, thereby driving the locomotive component 14 to be tested to rotate. The locomotive component 14 to be tested measures the current rotation speed, and compares the rotation speed measured by the locomotive component 14 to be tested with the simulated locomotive speed, thereby completing the performance test of the locomotive component 14 to be tested. The locomotive component testing device provided by an embodiment of the present invention simulates the actual working state of the locomotive through the driving module 15 to complete the performance test of the locomotive component 14 to be tested. The simulated locomotive speed is stable, and the system runs safely and reliably.

[0044] Continue to refer to Figure 2, optionally, the signal detection module 13 includes a DC voltage detection unit 131 and a pulse signal detection unit 132, and the locomotive component 14 to be measured includes a speed sensor; the DC voltage detection unit 131 includes a first feedback signal receiving terminal 411 and a DC voltage detection signal output terminal 421, the pulse signal detection unit 132 includes a second feedback signal receiving terminal 412 and a pulse detection signal output terminal 422, the detection signal receiving terminal 22 further includes a DC voltage detection signal receiving terminal 221 and a pulse detection signal receiving terminal 222, the first feedback signal receiving terminal 411 and the second feedback signal receiving terminal 412 are both electrically connected to the signal output terminal 521 of the speed sensor, the DC voltage detection signal output terminal 421 is electrically connected to the DC voltage detection signal receiving terminal 221, the pulse detection signal output terminal 422 is electrically connected to the pulse detection signal receiving terminal 222, and the control module 11 is configured to obtain a first detection result of the speed sensor according to the DC voltage detection signal and the pulse detection signal.

[0045] Exemplarily, as Figure 2 shown, the locomotive component 14 to be measured is a speed sensor. The control module 11 sets an analog locomotive speed, and the control module 11 sends a first control signal to the pulse signal generating unit 121 according to the set analog locomotive speed, so as to control the pulse signal generating unit 121 to send a pulse test signal with a frequency corresponding to the analog locomotive speed to the driving module 15. The driving module 15 receives the pulse test signal with a frequency corresponding to the analog locomotive speed and rotates according to the analog locomotive speed, thereby driving the speed sensor to rotate. The speed sensor outputs a speed measurement signal according to the rotation speed. The DC voltage detection unit 131 converts the speed measurement signal into a DC voltage detection signal and sends the DC voltage detection signal to the control module 11. The pulse signal detection unit 132 converts the speed measurement signal into a pulse detection signal and sends the pulse detection signal to the control module 11. The control module 11 obtains a first detection result of the speed sensor according to the DC voltage detection signal and the pulse detection signal, and judges the performance of the speed sensor.

[0046] Optionally, the first detection result includes one or more of high-level amplitude, low-level amplitude, duty cycle, phase difference, and number of pulses per revolution.

[0047] Among them, the DC voltage detection unit 131 converts the speed measurement signal into a DC voltage detection signal and sends the DC voltage detection signal to the control module 11. The pulse signal detection unit 132 converts the speed measurement signal into a pulse detection signal and sends the pulse detection signal to the control module 11. The control module 11 calculates the high-level amplitude and low-level amplitude of the speed measurement signal according to the DC voltage detection signal. The control module 11 obtains the duty cycle, phase difference and number of pulses per revolution of the speed measurement signal according to the pulse detection signal, and observes whether the high-level amplitude, low-level amplitude, duty cycle, phase difference and number of pulses per revolution meet the requirements for the speed measurement signal output by the speed sensor. For example, it observes whether the high-level amplitude and low-level amplitude of the speed measurement signal are within the required range, and whether the high-level amplitude and low-level amplitude are stable, so as to complete the performance test of the speed sensor.

[0048] Figure 3 FIG. is a schematic structural diagram of another locomotive component testing device provided by an embodiment of the present invention, as Figure 3 shown. Optionally, the signal detection module 13 includes an AC voltage detection unit 133, and the locomotive component 14 to be tested includes a tachogenerator. The AC voltage detection unit 133 includes a third feedback signal receiving terminal 413 and an AC voltage detection signal output terminal 423. The control signal receiving terminal 31 further includes an AC voltage detection signal receiving terminal 223. The third feedback signal receiving terminal 413 is electrically connected to the signal output end 522 of the tachogenerator, and the AC voltage detection signal output terminal 423 is electrically connected to the AC voltage detection signal receiving terminal 223. The control module 11 is configured to obtain a second detection result of the tachogenerator according to the AC voltage detection signal.

[0049] Exemplarily, as Figure 3 shown, the locomotive component 14 to be tested is a tachogenerator. The control module 11 sets an analog locomotive speed, and the control module 11 sends a first control signal to the pulse signal generating unit 121 according to the set analog locomotive speed, so as to control the pulse signal generating unit 121 to send a pulse test signal with a frequency corresponding to the analog locomotive speed to the driving module 15. The driving module 15 receives the pulse test signal with a frequency corresponding to the analog locomotive speed and rotates according to the analog locomotive speed, so as to drive the tachogenerator to rotate. The tachogenerator outputs an AC voltage speed measurement signal according to the rotation speed. The AC voltage detection unit 133 converts the AC voltage speed measurement signal into an AC voltage detection signal and sends the AC voltage detection signal to the control module 11. The control module 11 obtains a second detection result of the tachogenerator according to the AC voltage detection signal. The second detection result includes the level amplitude of the AC voltage speed measurement signal, and may also include the speed measured by the tachogenerator calculated from the level amplitude and compares the speed measured by the tachogenerator with the set analog locomotive speed to complete the performance test of the tachogenerator.

[0050] Continue to refer to Figure 2 and Figure 3 , optionally, the driving module 15 includes a servo motor driver 151 and a servo motor 152. The servo motor driver 151 is electrically connected to the servo motor 152 and is used to control the rotation of the servo motor 152. The servo motor 152 is connected to the locomotive component 14 to be measured and is used to drive the locomotive component 14 to be measured to rotate.

[0051] Specifically, the control module 11 sets the simulated locomotive speed. The control module 11 sends a first control signal to the pulse signal generating unit 121 according to the set simulated locomotive speed, so as to control the pulse signal generating unit 121 to send a pulse test signal with a frequency corresponding to the simulated locomotive speed to the servo motor driver 15. The servo motor driver 151 receives the pulse test signal with a frequency corresponding to the simulated locomotive speed and drives the servo motor 152 to rotate according to the simulated locomotive speed. The servo motor 152 drives the locomotive component 14 to be measured to rotate. Among them, the servo motor driver 151 is a controller used to control the servo motor 152, which can control the servo motor 152 in three ways: position, speed and torque, so as to achieve high-precision positioning of the transmission system. The servo motor 152 can control the speed and has very accurate position accuracy. Its rotor speed is controlled by the signal output from the servo motor driver 151 to the servo motor 152, and it can respond quickly. It has characteristics such as small mechanical and electrical time constant and high linearity, and can convert the electrical signal received by the servo motor driver 151 into angular displacement or angular velocity output on the motor shaft. The locomotive component testing device provided by the embodiment of the present invention uses a servo motor as the rotation power of the locomotive component 14 to be measured. Compared with the testing scheme using an asynchronous motor in the prior art, the simulated locomotive speed is stable and the detection accuracy is higher.

[0052] Figure 4 is a schematic structural diagram of another locomotive component testing device provided by the embodiment of the present invention, as Figure 4As shown, optionally, the signal output module 12 includes a pulse signal generating unit 121, and the locomotive component 14 to be measured includes a digital-to-analog conversion box. The pulse signal generating unit 121 includes a first control signal receiving terminal 311 and a pulse test signal output terminal 321. The control signal output terminal 21 includes a first control signal output terminal 211. The first control signal receiving terminal 311 and the first control signal output terminal 211 are electrically connected. The pulse test signal output terminal 321 is electrically connected to the signal input terminal 51 of the digital-to-analog conversion box. The signal detection module 13 includes a DC current detection unit 134. The DC current detection unit 134 includes a fourth feedback signal receiving terminal 414 and a DC current detection signal output terminal 424. The detection signal receiving terminal 22 further includes a DC current detection signal receiving terminal 224. The fourth feedback signal receiving terminal 414 is electrically connected to the signal output terminal 523 of the digital-to-analog conversion box. The DC current detection signal output terminal 424 is electrically connected to the DC current detection signal receiving terminal 224. The control module 11 is configured to obtain a third detection result of the digital-to-analog conversion box according to the DC detection signal.

[0053] Exemplarily, as Figure 4 shown, the locomotive component 14 to be measured is a digital-to-analog conversion box. The control module 11 sets an analog locomotive speed, and the control module 11 sends a first control signal to the pulse signal generating unit 121 according to the set analog locomotive speed, so as to control the pulse signal generating unit 121 to simulate a speed sensor and send a pulse test signal with a frequency corresponding to the analog locomotive speed to the digital-to-analog conversion box. The digital-to-analog conversion box receives the pulse test signal with a frequency corresponding to the analog locomotive speed, converts the pulse test signal into a DC current signal, and the DC current detection unit 134 converts the DC current signal into a DC current detection signal and sends the DC current detection signal to the control module 11. The control module 11 performs analog-to-digital conversion according to the DC current value of the DC current detection signal, calculates to obtain a third detection result of the digital-to-analog conversion box. The third detection result includes the speed information output by the digital-to-analog conversion box, and compares the speed information output by the digital-to-analog conversion box with the set analog locomotive speed to detect the conversion error of the digital-to-analog conversion box, thereby completing the performance test of the digital-to-analog conversion box. The locomotive component testing device provided by the embodiment of the present invention uses the pulse signal generating unit 121 to simulate a speed sensor and send a pulse test signal with a frequency corresponding to the analog locomotive speed to the digital-to-analog conversion box to complete the performance test of the digital-to-analog conversion box, with higher automation and detection accuracy.

[0054] Figure 5 FIG. is a schematic structural diagram of another locomotive component testing device provided by an embodiment of the present invention. As Figure 5As shown, optionally, the signal output module 12 includes a current signal generating unit 122, and the locomotive component 14 to be measured includes a speed display instrument. The current signal generating unit 122 includes a second control signal receiving terminal 312 and a current test signal output terminal 322. The control signal output terminal 21 includes a second control signal output terminal 212. The second control signal receiving terminal 312 and the second control signal output terminal 212 are electrically connected, and the current test signal output terminal 322 is electrically connected to the signal input terminal 51 of the speed display instrument.

[0055] Exemplarily, as Figure 5 shown, the locomotive component 14 to be measured is a speed display instrument. The control module 11 sets an analog locomotive speed. The control module 11 sends a second control signal to the current signal generating unit 122 according to the set analog locomotive speed. Thus, the current signal generating unit 122 simulates a digital-to-analog conversion box and sends a current test signal corresponding to the analog locomotive speed to the speed display instrument. The speed display instrument receives the current test signal corresponding to the analog locomotive speed and displays the current speed according to the current test signal. By manually observing the speed indicated by the pointer of the speed display instrument and comparing the speed indicated by the pointer of the speed display instrument with the set analog locomotive speed, the error of the speed display instrument is judged, thereby completing the performance test of the speed display instrument. The locomotive component test device provided by the embodiment of the present invention uses the current signal generating unit 122 to simulate a digital-to-analog conversion box and send a current test signal corresponding to the analog locomotive speed to the speed display instrument to complete the performance test of the speed display instrument, with higher automation and detection accuracy.

[0056] Continue to refer to Figures 2 - 5 , optionally, the control module 11 includes an industrial control computer 111 and an intelligent control unit 112. The industrial control computer 111 includes a test command output terminal 71 and a measurement signal receiving terminal 73. The intelligent control unit 112 includes a test command receiving terminal 72 and a measurement signal output terminal 74. The test command output terminal 71 and the test command receiving terminal 72 are electrically connected, and the measurement signal receiving terminal 73 and the measurement signal output terminal 74 are electrically connected.

[0057] Among them, the intelligent control unit 112 can be composed of a single-chip microcomputer. Communication is carried out between the industrial control computer 111 and the intelligent control unit 112 to exchange test commands and measurement parameters. Exemplarily, the industrial control computer 111 is used for human-computer interaction. The simulated locomotive speed is set through the industrial control computer 111. The industrial control computer 111 sends the test command of the simulated locomotive speed to the intelligent control unit 112. The intelligent control unit 112 converts the test command of the simulated locomotive speed into a pulse frequency, so as to control the pulse signal generating unit 121 to generate and output a pulse test signal corresponding to the pulse frequency. The intelligent control unit 112 receives the detection signal, converts the detection signal into a measurement signal, and the intelligent control unit 112 transmits the measurement signal to the industrial control computer 111, so as to facilitate the industrial control computer to perform calculation and processing on the measurement signal.

[0058] Figure 6 is a schematic structural diagram of another locomotive component test device provided by an embodiment of the present invention. As Figure 6 shown, optionally, the intelligent control unit 112 includes an analog-to-digital converter 1121. The analog-to-digital converter 1121 is electrically connected to the detection signal output terminal 42. The analog-to-digital converter 1121 is used to convert the detection signal output by the signal detection module 13 into a digital signal.

[0059] Among them, the analog-to-digital converter 1121 converts the detection signal received by the intelligent control unit 112 into a digital signal, and transmits the digital signal to the industrial control computer 111, so as to facilitate the industrial control computer to process and display the digital signal.

[0060] To sum up, Figure 7 is a schematic structural diagram of another locomotive component test device provided by an embodiment of the present invention. As Figure 7As shown in the figure, the locomotive component testing device provided by the embodiment of the present invention includes a control module 11, a signal output module 12, a signal detection module 13, and a driving module 15. Among them, the control module 11 includes an industrial control computer 111 and an intelligent control unit 112, and the industrial control computer 111 and the intelligent control unit 112 are electrically connected. The signal output module 12 includes a pulse signal generating unit 121 and a current signal generating unit 122. Both the pulse signal generating unit 121 and the current signal generating unit 122 are electrically connected to the intelligent control unit 112. The control signal receiving terminal 31 includes a first control signal receiving terminal 311 and a second control signal receiving terminal 312. The test signal output terminal 32 includes a pulse test signal output terminal 321 and a current test signal output terminal 322. The signal detection module 13 includes a DC voltage detection unit 131, a pulse signal detection unit 132, an AC voltage detection unit 133, and a DC current detection unit 134. The DC voltage detection unit 131, the pulse signal detection unit 132, the AC voltage detection unit 133, and the DC current detection unit 134 are all electrically connected to the intelligent control unit 112. The feedback signal receiving terminal 41 includes a first feedback signal receiving terminal 411, a second feedback signal receiving terminal 412, a third feedback signal receiving terminal 413, and a fourth feedback signal receiving terminal 414. The detection signal output terminal 42 includes a DC voltage detection signal output terminal 421, a pulse detection signal output terminal 422, an AC voltage detection signal output terminal 423, and a DC current detection signal output terminal 424. The driving module 15 includes a servo motor driver 151 and a servo motor 152, and the servo motor driver 151 and the servo motor 152 are electrically connected, so as to realize the comprehensive testing of locomotive components such as speed sensors, tachogenerators, digital-to-analog conversion boxes, and speed display instruments, and the testing process is efficient and accurate.

[0061] Specifically, when the locomotive component 14 to be tested is a speed sensor, the pulse signal generating unit 121 is electrically connected to the servo motor driver 151, the servo motor 152 is connected to the speed sensor, and the speed sensor is electrically connected to the DC voltage detection unit 131 and the pulse signal detection unit 132 respectively. During the test, the industrial control computer 111 sets the simulated locomotive speed, and the intelligent control unit 112 controls the pulse signal generating unit 121 to generate and output a pulse test signal with a corresponding frequency according to the simulated locomotive speed. The servo motor driver 151 drives the servo motor 152 to rotate at the simulated locomotive speed according to the pulse test signal, thereby driving the speed sensor to rotate at the simulated locomotive speed. The speed sensor generates and outputs a speed measurement signal according to the rotation speed. The DC voltage detection unit 131 converts the speed measurement signal into a DC voltage detection signal and sends the DC voltage detection signal to the intelligent control unit 112. The pulse signal detection unit 132 converts the speed measurement signal into a pulse detection signal and sends the pulse detection signal to the intelligent control unit 112. The intelligent control unit 112 performs analog-to-digital conversion on the DC voltage detection signal, and the industrial control computer 111 obtains the high and low level amplitudes of the speed measurement signal output by the speed sensor according to the analog-to-digital converted DC voltage detection signal. The intelligent control unit 112 performs analog-to-digital conversion on the pulse detection signal, and the industrial control computer 111 obtains the duty cycle, phase difference and number of pulses per revolution of the speed measurement signal output by the speed sensor according to the analog-to-digital converted pulse detection signal, thereby completing the performance test of the speed sensor.

[0062] When the locomotive component 14 to be tested is a tachogenerator, the pulse signal generating unit 121 is electrically connected to the servo motor driver 151, the servo motor 152 is connected to the tachogenerator, and the tachogenerator is electrically connected to the AC voltage detection unit 133. During the test, the industrial control computer 111 sets the simulated locomotive speed, and the intelligent control unit 112 controls the pulse signal generating unit 121 to generate and output a pulse test signal with a corresponding frequency according to the simulated locomotive speed. The servo motor driver 151 drives the servo motor 152 to rotate at the simulated locomotive speed according to the pulse test signal, thereby driving the tachogenerator to rotate at the simulated locomotive speed. The tachogenerator generates and outputs an AC voltage speed measurement signal according to the rotation speed. The AC voltage detection unit 133 converts the AC voltage speed measurement signal into an AC voltage detection signal and sends the AC voltage detection signal to the intelligent control unit 112. The intelligent control unit 112 performs analog-to-digital conversion on the AC voltage detection signal, and the industrial control computer 111 obtains the level amplitude of the AC voltage speed measurement signal according to the analog-to-digital converted AC voltage detection signal, and calculates the speed measured by the tachogenerator from the level amplitude. The speed measured by the tachogenerator is compared with the set simulated locomotive speed to complete the speed measurement performance test of the tachogenerator.

[0063] When the locomotive component 14 to be tested is a digital-to-analog conversion box, the pulse signal generating unit 121 is electrically connected to the digital-to-analog conversion box, and the digital-to-analog conversion box is electrically connected to the DC current detection unit 134. During the test, the industrial control computer 111 is used to set the simulated locomotive speed. The intelligent control unit 112 controls the pulse signal generating unit 121 to generate a pulse test signal with a corresponding frequency according to the simulated locomotive speed. The pulse signal generating unit 121 sends the pulse test signal to the digital-to-analog conversion box. The digital-to-analog conversion box receives the pulse test signal with a frequency corresponding to the simulated locomotive speed, converts the pulse test signal into a DC current signal, and the DC current detection unit 134 converts the DC current signal into a DC current detection signal and sends the DC current detection signal to the intelligent control unit 112. The intelligent control unit 112 performs analog-to-digital conversion on the DC current detection signal. The industrial control computer 111 obtains the current value of the DC current detection signal based on the analog-to-digital converted DC current detection signal, calculates the speed output by the digital-to-analog conversion box from the current value, compares the speed information output by the digital-to-analog conversion box with the set simulated locomotive speed, detects the conversion error of the digital-to-analog conversion box, and thus completes the performance test of the digital-to-analog conversion box.

[0064] When the locomotive component 14 to be tested is a speed display instrument, the current signal generating unit 122 is electrically connected to the speed display instrument. During the test, the industrial control computer 111 is used to set the simulated locomotive speed. The intelligent control unit 112 controls the current signal generating unit 122 to generate a current test signal with a corresponding current value according to the simulated locomotive speed. The current signal generating unit 122 transmits the current test signal to the speed display instrument. The speed display instrument displays the current speed according to the current test signal. By manually observing the speed indicated by the pointer of the speed display instrument and comparing the speed indicated by the pointer of the speed display instrument with the set simulated locomotive speed, the error of the speed display instrument is judged, and thus the performance test of the speed display instrument is completed.

[0065] The embodiment of the present invention provides a comprehensive test device for multiple locomotive components. When testing different locomotive components, different test signals are provided to enable a test device to perform performance tests on multiple locomotive components. The test device has stable simulated locomotive speed, high functional integration, high automation, safe and reliable system operation, and high detection accuracy.

[0066] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A locomotive component testing device, characterized in that: It includes a control module, a signal output module and a signal detection module; the control module includes a control signal output terminal and a detection signal receiving terminal, the signal output module includes a control signal receiving terminal and a test signal output terminal, and the signal detection module includes a feedback signal receiving terminal and a detection signal output terminal; wherein the control signal output terminal is electrically connected to the control signal receiving terminal, the test signal output terminal is electrically connected to the signal input terminal of the locomotive component to be tested, the feedback signal receiving terminal is electrically connected to the signal output terminal of the locomotive component to be tested, and the detection signal output terminal is electrically connected to the detection signal receiving terminal; The locomotive component to be tested includes at least one of a speed sensor, a speed measuring motor, a digital-to-analog conversion box and a speed display instrument provided on the locomotive; The control module includes an industrial computer and an intelligent control unit; The industrial computer includes a test command output terminal and a measurement signal receiving terminal, the intelligent control unit includes a test command receiving terminal and a measurement signal output terminal, the test command output terminal is electrically connected to the test command receiving terminal, the measurement signal receiving terminal is electrically connected to the measurement signal output terminal, and the intelligent control unit includes a single-chip microcomputer; The signal output module includes a pulse signal generating unit; the locomotive component to be tested includes a digital-to-analog conversion box; The pulse signal generating unit includes a first control signal receiving terminal and a pulse test signal output terminal, the control signal output terminal includes a first control signal output terminal, the first control signal receiving terminal and the first control signal output terminal are electrically connected; the pulse test signal output terminal is electrically connected to the signal input terminal of the digital-to-analog conversion box; The signal detection module includes a DC current detection unit, the DC current detection unit includes a fourth feedback signal receiving terminal and a DC current detection signal output terminal, the detection signal receiving terminal further includes a DC current detection signal receiving terminal, the fourth feedback signal receiving terminal is electrically connected to the signal output end of the digital-to-analog conversion box, and the DC current detection signal output terminal is electrically connected to the DC current detection signal receiving terminal; The control module is used to obtain a third detection result of the digital-to-analog conversion box according to the DC detection signal.

2. The locomotive component testing device according to claim 1, characterized in that: The locomotive component testing device further includes a driving module, the driving module including a pulse test signal receiving terminal; The signal output module includes a pulse signal generating unit; the pulse signal generating unit includes a first control signal receiving terminal and a pulse test signal output terminal, the control signal output terminal includes a first control signal output terminal, the first control signal receiving terminal and the first control signal output terminal are electrically connected; the pulse test signal output terminal is electrically connected to the pulse test signal receiving terminal; The driving module is connected to the locomotive component to be tested, and the driving module is used to drive the locomotive component to be tested to rotate.

3. The locomotive component testing device according to claim 2, characterized in that: The signal detection module includes a DC voltage detection unit and a pulse signal detection unit; the locomotive component to be tested includes a speed sensor; The DC voltage detection unit includes a first feedback signal receiving terminal and a DC voltage detection signal output terminal; The pulse signal detection unit includes a second feedback signal receiving terminal and a pulse detection signal output terminal; the detection signal receiving terminal includes a DC voltage detection signal receiving terminal and a pulse detection signal receiving terminal; The first feedback signal receiving terminal and the second feedback signal receiving terminal are both electrically connected to the signal output terminal of the speed sensor, the DC voltage detection signal output terminal is electrically connected to the DC voltage detection signal receiving terminal, and the pulse detection signal output terminal is electrically connected to the pulse detection signal receiving terminal; The control module is used to obtain a first detection result of the speed sensor according to the DC voltage detection signal and the pulse detection signal.

4. The locomotive component testing device according to claim 3, characterized in that: The first detection result includes one or more of a high level amplitude, a low level amplitude, a duty cycle, a phase difference, and a number of pulses per revolution.

5. The locomotive component testing device according to claim 2, characterized in that: The signal detection module includes an AC voltage detection unit; the locomotive component to be tested includes a speed measuring motor; The AC voltage detection unit includes a third feedback signal receiving terminal and an AC voltage detection signal output terminal, the control signal receiving terminal further includes an AC voltage detection signal receiving terminal, the third feedback signal receiving terminal is electrically connected to the signal output end of the speed measuring motor, and the AC voltage detection signal output terminal is electrically connected to the AC voltage detection signal receiving terminal; The control module is used to obtain a second detection result of the speed measuring motor according to the AC voltage detection signal.

6. The locomotive component testing device according to claim 2, characterized in that: The driving module includes a servo motor driver and a servo motor; The servo motor driver is electrically connected to the servo motor and is used to control the rotation of the servo motor; The servo motor is connected to the locomotive component to be tested and is used to drive the locomotive component to be tested to rotate.

7. The locomotive component testing device according to claim 1, characterized in that: The signal output module includes a current signal generating unit; the locomotive component to be tested includes a speed display instrument; The current signal generating unit includes a second control signal receiving terminal and a current test signal output terminal, the control signal output terminal includes a second control signal output terminal, the second control signal receiving terminal and the second control signal output terminal are electrically connected; the current test signal output terminal is electrically connected to the signal input terminal of the speed display instrument.

8. The locomotive component testing device according to claim 1, characterized in that: The intelligent control unit includes an analog-to-digital converter; The analog-to-digital converter is electrically connected to the detection signal output terminal, and is used to convert the detection signal output by the signal detection module into a digital signal.

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