Detection device of speed sensor for rail transit electric passenger car

Abstract

The utility model provides a detection device of a speed sensor for a rail transit electric passenger car. The detection device comprises a power supply conversion module, a stepping motor control module, a stepping motor and a signal acquisition module, the power supply end of the signal acquisition module and the alternating current input end of the power supply conversion module are both connected with external alternating current, the direct current output end of the power supply conversion module is connected with the input end of the stepping motor control module, and the output end of the stepping motor control module is connected with the power supply end of the stepping motor; an input shaft of a speed sensor to be detected is coaxially and fixedly connected with an output shaft of the stepping motor. The detection device of the speed sensor for the rail transit electric passenger car disclosed by the utility model can carry out offline test on the speed sensor needing to be detected, does not need to be installed on the passenger car to carry out online performance detection of vehicle operation, is not influenced by weather, and has the characteristics of time saving, labor saving and convenience in operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail transportation, and in particular relates to a detection device of a speed sensor for a rail transportation electric passenger car. Background Art

[0002] Speed ​​sensors are widely used to measure the speed of subway cars, but there is no dedicated and convenient speed sensor performance test equipment. Under existing technical conditions, speed sensors are usually installed on the car first, and then the vehicle's online performance test is carried out. This has the problems of low efficiency, long time consumption, great influence by weather, limited time and the need for driver cooperation. Utility Model Content

[0003] In view of this, the utility model aims to overcome the defects in the prior art and proposes a detection device for a speed sensor for rail transit electric passenger cars.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A detection device for a speed sensor for a rail transit electric passenger car comprises a power conversion module, a stepper motor control module, a stepper motor and a signal acquisition module; the power supply end of the signal acquisition module and the AC input end of the power conversion module are both connected to external AC power, the DC output end of the power conversion module is connected to the input end of the stepper motor control module, and the output end of the stepper motor control module is connected to the power supply end of the stepper motor; the input shaft of the speed sensor to be detected is coaxially fixedly connected to the output shaft of the stepper motor; the signal output end of the speed sensor is connected to the input end of the signal acquisition module, and the output end of the signal acquisition module is connected to a host computer for displaying the speed sensor reading; the negative pole of the DC output end of the power conversion module is correspondingly connected to the motor forward control port and the motor reverse control port of the stepper motor control module through a second switch and a third switch respectively.

[0006] Preferably, the power conversion module, the stepper motor and the signal acquisition module are all arranged inside the box; the stepper motor control module, the speed sensor, the second switch and the third switch are all arranged on the surface of the box.

[0007] Furthermore, the signal output end of the speed sensor is connected to the input end of the signal acquisition module through a sensor interface, and the sensor interface is arranged on the surface of the box.

[0008] Furthermore, the output end of the signal acquisition module is connected to the host computer through an output interface, and the output interface is arranged on the surface of the box.

[0009] Furthermore, the DC output end of the power conversion module is connected to the input end of the stepper motor control module through a first switch, and the first switch is arranged on the surface of the box.

[0010] Preferably, a mounting seat is provided on the surface of the box body, and the speed sensor can be detachably fixed on the mounting seat.

[0011] Preferably, the output interface is a USB interface.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] First, the utility model discloses a detection device for a speed sensor for a rail transit electric passenger car, which can perform offline testing on the speed sensor that needs to be tested, and does not need to be installed on the passenger car to perform online performance testing of the vehicle operation, and has the characteristics of saving time and labor and being easy to operate.

[0014] Secondly, the detection device of a speed sensor for a rail transit electric passenger car disclosed by the utility model can be suitable for various types of speed sensors, and has the characteristics of wide application range and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0016] In the attached picture:

[0017] Figure 1 This is a schematic diagram of the principle of a detection device for a speed sensor for a rail transit electric passenger car according to an embodiment of the utility model;

[0018] Figure 2 The present invention is a schematic structural diagram of a detection device for a speed sensor for a rail transit electric passenger car according to an embodiment of the present invention.

[0019] Description of reference numerals:

[0020] 1-power conversion module; 2-stepper motor control module; 3-stepper motor; 4-signal acquisition module; 5-sensor interface; 6-host computer; 7-speed sensor; 8-first switch; 9-second switch; 10-third switch; 11-box; 12-output interface. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the description of the present utility model, it should be further explained that the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0025] Under the existing technical conditions, the speed sensor is generally installed on the bus first, and then the online performance test of the vehicle operation is carried out, which has the problems of low efficiency, long time consumption, great influence by weather, limited time and driver cooperation. The utility model discloses a device for offline speed sensor performance test, which has the characteristics of saving time and labor and convenient operation.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0027] In one embodiment of the present invention, Figure 1 and Figure 2As shown, a detection device for a speed sensor for a rail transit electric passenger car includes a power conversion module 1, a stepper motor control module 2, a stepper motor 3 and a signal acquisition module 4; the power supply end of the signal acquisition module 4 and the AC input end of the power conversion module 1 are both connected to external AC power, the DC output end of the power conversion module 1 is connected to the input end of the stepper motor control module 2, and the output end of the stepper motor control module 2 is connected to the power supply end of the stepper motor 3; the input shaft of the speed sensor 7 to be detected is coaxially fixedly connected to the output shaft of the stepper motor 3; the signal output end of the speed sensor 7 is connected to the input end of the signal acquisition module 4, and the output end of the signal acquisition module 4 is connected to a host computer 6 for displaying the reading of the speed sensor 7; the negative pole of the DC output end of the power conversion module 1 is correspondingly connected to the motor forward control port and the motor reverse control port of the stepper motor control module 2 through the second switch 9 and the third switch 10 respectively.

[0028] In the actual application of this embodiment, first, the operator coaxially connects the speed sensor 7 to be detected with the output shaft of the stepper motor 3, and the signal output end of the speed sensor 7 is connected to the input end of the signal acquisition module 4. The speed of the stepper motor 3 is further set through the stepper motor control module 2 to simulate the wheel speed. At this time, the power conversion module 1 converts the external AC power into DC power and inputs it into the stepper motor control module 2. The stepper motor control module 2 outputs the corresponding stepper motor 3 drive signal to the power supply end of the stepper motor 3 according to the set speed of the stepper motor 3. The stepper motor 3 rotates at the set speed. At this time, the speed sensor 7 collects the speed signal of the stepper motor 3 and sends it to the signal acquisition module 4. The signal acquisition module 4 further forwards the speed signal of the stepper motor 3 collected by the speed sensor 7 to the host computer 6. The host computer 6 displays the speed information collected by the speed sensor 7. At this time, the operator compares the speed information displayed by the host computer 6 with the speed set by the stepper motor control module 2. If the error is less than three turns per minute, it is judged that the performance of the detected speed sensor 7 is normal. Otherwise, it is judged that the performance of the speed sensor 7 is abnormal.

[0029] In this embodiment, the power conversion module 1 converts the external 220V AC power into 24V DC, which is further supplied to the stepper motor control module 2. The stepper motor control module 2 adjusts the input 24V DC and outputs a corresponding driving signal for the stepper motor 3.

[0030] In this embodiment, the wheel rotation effect is simulated by the stepper motor 3. The speed sensor 7 to be detected is also a speed measuring motor. Since it is coaxially fixedly connected to the stepper motor 3, the speed of the stepper motor 3 can be measured, that is, the wheel rotation speed is simulated.

[0031] In this embodiment, if Figure 1As shown, the operator controls the on and off of the second switch 9 and the third switch 10 respectively, so that the stepper motor control module 2 controls the forward and reverse rotation of the stepper motor 3 to achieve the effect of simulating the forward and reverse rotation of the wheel.

[0032] In another embodiment of the present invention, Figure 1 and Figure 2 As shown, the power conversion module 1 , the stepper motor 3 and the signal acquisition module 4 are all arranged inside the box 11 ; the stepper motor control module 2 , the speed sensor 7 , the second switch 9 and the third switch 10 are all arranged on the surface of the box 11 .

[0033] In this embodiment, if Figure 1 and Figure 2 As shown, the signal output end of the speed sensor 7 is connected to the input end of the signal acquisition module 4 through the sensor interface 5 , and the sensor interface 5 is arranged on the surface of the box 11 .

[0034] The sensor interface 5 is arranged on the surface of the box body 11 to facilitate the connection of speed sensors 7 of different models when testing.

[0035] In another embodiment of the present invention, Figure 1 and Figure 2 As shown, the output end of the signal acquisition module 4 is connected to the host computer 6 through the output interface 12 , and the output interface 12 is arranged on the surface of the box 11 .

[0036] In this embodiment, the power conversion module 1 and the signal acquisition module 4 are existing devices in the prior art and can be easily purchased. How to connect and use them is common knowledge and is completely understandable to those skilled in the art.

[0037] In this embodiment, the DC output end of the power conversion module 1 is connected to the input end of the stepper motor control module 2 through the first switch 8 , and the first switch 8 is arranged on the surface of the box 11 .

[0038] The first switch 8 is used to control the start and stop of the stepper motor control module 2 .

[0039] In another embodiment of the present invention, Figure 2 As shown, a mounting seat is provided on the surface of the box body 11, and the speed sensor 7 can be detachably fixed on the mounting seat.

[0040] like Figure 2 As shown, the output interface 12 is a USB interface.

[0041] The embodiments of the present invention are described above. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present invention is defined by the attached claims and their equivalents. Without departing from the scope of the present invention, a person skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A detection device for a speed sensor for a rail transit electric passenger car, characterized in that: The invention comprises a power conversion module (1), a stepper motor control module (2), a stepper motor (3) and a signal acquisition module (4); the power supply end of the signal acquisition module (4) and the AC input end of the power conversion module (1) are both connected to external AC power, the DC output end of the power conversion module (1) is connected to the input end of the stepper motor control module (2), and the output end of the stepper motor control module (2) is connected to the power supply end of the stepper motor (3); the input shaft of the speed sensor (7) to be detected is coaxially fixedly connected to the output shaft of the stepper motor (3); the signal output end of the speed sensor (7) is connected to the input end of the signal acquisition module (4), and the output end of the signal acquisition module (4) is connected to a host computer (6) for displaying the reading of the speed sensor (7); the negative pole of the DC output end of the power conversion module (1) is respectively connected to the motor forward control port and the motor reverse control port of the stepper motor control module (2) through a second switch (9) and a third switch (10).

2. The detection device of a speed sensor for a rail transit electric passenger car according to claim 1, characterized in that: The power conversion module (1), the stepper motor (3) and the signal acquisition module (4) are all arranged inside the box (11); the stepper motor control module (2), the speed sensor (7), the second switch (9) and the third switch (10) are all arranged on the surface of the box (11).

3. The detection device of a speed sensor for a rail transit electric passenger car according to claim 2, characterized in that: The signal output end of the speed sensor (7) is connected to the input end of the signal acquisition module (4) via a sensor interface (5), and the sensor interface (5) is arranged on the surface of the box (11).

4. The detection device of a speed sensor for a rail transit electric passenger car according to claim 2, characterized in that: The output end of the signal acquisition module (4) is connected to the host computer (6) via an output interface (12), and the output interface (12) is arranged on the surface of the box (11).

5. The detection device of a speed sensor for a rail transit electric passenger car according to claim 2, characterized in that: The DC output end of the power conversion module (1) is connected to the input end of the stepper motor control module (2) via a first switch (8), and the first switch (8) is arranged on the surface of the box (11).

6. The detection device of a speed sensor for a rail transit electric passenger car according to claim 2, characterized in that: A mounting seat is provided on the surface of the box body (11), and the speed sensor (7) can be detachably fixed on the mounting seat.

7. The detection device of a speed sensor for a rail transit electric passenger car according to claim 4, characterized in that: The output interface (12) is a USB interface.

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