A coaxial same-frequency asynchronous vehicle speed sensor aging device

Abstract

The application discloses a coaxial same-frequency asynchronous vehicle speed sensor aging device and belongs to the detection field. The application aims to solve the problem that the existing vehicle speed sensor lacks aging detection. A detection unit is used for collecting continuous level periods output by a first vehicle speed sensor and n second vehicle speed sensors, establishing a one-to-one correspondence table of high level values output by the first vehicle speed sensor and low level values output by the second vehicle speed sensors under the same level period, judging whether the low level values of each second vehicle speed sensor corresponding to the same high level value of the first vehicle speed sensor in the correspondence table are the same, and if not, judging that the second vehicle speed sensors corresponding to the different low level values are damaged, and if yes, judging that the n second vehicle speed sensors are normal. The application is used for aging detection of the vehicle speed sensor.

Description

TECHNICAL FIELD

[0001] The present application relates to an aging device, and belongs to the field of detection. BACKGROUND

[0002] The existing vehicle speed sensor is put into market use without aging detection, and the problem of whether the vehicle speed sensor is damaged in a short time after being put into use, that is, the problem of low service life, cannot be detected. Therefore, there is a lack of a device for aging detection of the vehicle speed sensor before the vehicle speed sensor is put into use, which is not conducive to the reliable use of the vehicle speed sensor. SUMMARY

[0003] The present application aims to solve the problem of the lack of aging detection of the vehicle speed sensor, and provides a coaxial and same-frequency asynchronous vehicle speed sensor aging device.

[0004] A coaxial and same-frequency asynchronous vehicle speed sensor aging device, the device comprising a motor, a first vehicle speed sensor, n second vehicle speed sensors, n+1 gears and a detection unit, n being a positive integer;

[0005] The n+1 gears are all sleeved on the rotating shaft of the motor, and the motor drives the n+1 gears to rotate synchronously;

[0006] The collection port of the first vehicle speed sensor is initially aligned with a tooth tip of a gear, and the collection port of each second vehicle speed sensor is initially opposite to a tooth gap of a gear. The first vehicle speed sensor and the n second vehicle speed sensors are the same gears. The first vehicle speed sensor is a standard vehicle speed sensor;

[0007] The first vehicle speed sensor is used to collect continuous level periods in the rotation process of the corresponding gear. The level period is a time coordinate and a voltage amplitude coordinate. The voltage amplitude includes a low level and a high level. The first vehicle speed sensor outputs a high level when it is directly opposite to the tooth tip of the gear, and outputs a low level when it is directly opposite to the tooth gap of the gear;

[0008] Each second vehicle speed sensor is used to collect continuous level periods in the rotation process of the corresponding gear. The level period is a time coordinate and a voltage amplitude coordinate. The voltage amplitude includes a low level and a high level. The second vehicle speed sensor outputs a high level when it is directly opposite to the tooth tip of the gear, and outputs a low level when it is directly opposite to the tooth gap of the gear;

[0009] The detection unit is used to collect the continuous level cycle output of vehicle speed sensor No. 1 and n vehicle speed sensors No. 2, establish a one-to-one correspondence table between the high level value output by vehicle speed sensor No. 1 and the low level value output by vehicle speed sensor No. 2 under the same level cycle, and determine whether the low level value of each vehicle speed sensor No. 2 corresponding to the same high level value of vehicle speed sensor No. 1 in the correspondence table is the same. If not, it is determined that the vehicle speed sensor No. 2 corresponding to different low level values ​​is damaged. If so, it is determined that all n vehicle speed sensors No. 2 are normal.

[0010] Preferably, the device further includes a housing.

[0011] The housing encloses n+1 gears, and holes are provided on the housing for housing the first vehicle speed sensor and the second vehicle speed sensor, so that the first vehicle speed sensor and the n second vehicle speed sensors each correspond to one gear.

[0012] Preferably, the device includes a motor, m vehicle speed sensors, m gears, and a detection unit, where m is a positive integer;

[0013] All m gears are mounted on the motor shaft. When the motor is working, it drives the m gears to rotate synchronously.

[0014] The initial state of the acquisition port of each vehicle speed sensor is aligned with the tip of one tooth of the corresponding gear;

[0015] Each vehicle speed sensor is used to collect the continuous level cycle during the rotation of the corresponding gear in real time. The level cycle is time on the horizontal axis and voltage amplitude on the vertical axis. The voltage amplitude includes low level and high level. The vehicle speed sensor outputs a high level when it is facing the tip of the gear tooth and a low level when it is facing the space between the gear teeth.

[0016] The detection unit is used to collect the continuous level cycle output by m vehicle speed sensors, and determine whether each level cycle of each vehicle speed sensor is the same as the preset level cycle. If so, the corresponding vehicle speed sensor is determined to be normal; otherwise, the corresponding vehicle speed sensor is determined to be damaged.

[0017] Preferably,

[0018] The detection unit is also used to detect whether the same abnormal waveform exists in each level cycle of the output of each vehicle speed sensor. If so, it is determined that there is foreign matter or dust on the gear corresponding to the corresponding vehicle speed sensor. If not, it is determined that there is no foreign matter or dust on the gear corresponding to the corresponding vehicle speed sensor.

[0019] The beneficial effects of this invention are:

[0020] This application can use a single good vehicle speed sensor to detect whether multiple second vehicle speed sensors are damaged, achieving high efficiency in detecting vehicle speed sensor damage. Furthermore, each vehicle speed sensor can be equipped with a corresponding gear, and the aging of the vehicle speed sensor can be achieved by collecting the rotation cycle of the gear, thereby determining whether the vehicle speed sensor is damaged. This method analyzes the level cycle collected by each vehicle speed sensor independently to determine whether the vehicle speed sensor is damaged. It can also detect whether there are foreign objects on the gear. Therefore, this application can achieve vehicle speed sensor aging and detect whether the vehicle speed sensor is damaged during the aging process. Damaged vehicle speed sensors can be detected and removed in a timely manner to ensure that normal vehicle speed sensors can be used reliably and for a long time after being put on the market. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the principle of an aging device for a coaxial asynchronous vehicle speed sensor according to a specific implementation method one;

[0022] Figure 2 This is a schematic diagram of the principle of an aging device for a coaxial, synchronous, asynchronous vehicle speed sensor in Specific Implementation Method 3. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0026] Specific implementation method one: Combining Figure 1 This embodiment describes a coaxial, synchronous, asynchronous vehicle speed sensor aging device. The device includes a motor, a first vehicle speed sensor, n second vehicle speed sensors, n+1 gears, and a detection unit, where n is a positive integer.

[0027] All n+1 gears are mounted on the motor shaft. When the motor is working, it drives the n+1 gears to rotate synchronously.

[0028] The initial state of the acquisition port of vehicle speed sensor No. 1 is aligned with the tip of a tooth of a gear, and the initial state of the acquisition port of each vehicle speed sensor No. 2 is aligned with a tooth of a gear; vehicle speed sensor No. 1 and n vehicle speed sensors No. 2 are all on the same gear; vehicle speed sensor No. 1 is a standard vehicle speed sensor.

[0029] The No. 1 vehicle speed sensor is used to collect the continuous level period during the rotation of the corresponding gear. The level period is time on the horizontal axis and voltage amplitude on the vertical axis. The voltage amplitude includes low level and high level. The No. 1 vehicle speed sensor outputs a high level when it is facing the tooth peak of the gear and outputs a low level when it is facing the tooth gap of the gear.

[0030] Each speed sensor is used to collect the continuous level period during the rotation of the corresponding gear. The level period is plotted with time on the horizontal axis and voltage amplitude on the vertical axis. The voltage amplitude includes low level and high level. The speed sensor outputs a high level when it is facing the tooth peak of the gear and a low level when it is facing the tooth gap of the gear.

[0031] The detection unit is used to collect the continuous level cycle output of vehicle speed sensor No. 1 and n vehicle speed sensors No. 2, establish a one-to-one correspondence table between the high level value output by vehicle speed sensor No. 1 and the low level value output by vehicle speed sensor No. 2 under the same level cycle, and determine whether all the low level values ​​of each vehicle speed sensor No. 2 corresponding to the high level value of vehicle speed sensor No. 1 in the correspondence table are the same. If not, it is determined that the vehicle speed sensor No. 2 corresponding to different low level values ​​is damaged. If so, it is determined that all n vehicle speed sensors No. 2 are normal.

[0032] In this embodiment, the No. 1 vehicle speed sensor is a standard vehicle speed sensor, which means that the No. 1 vehicle speed sensor is a sensor that has been tested and is not damaged. Therefore, it is beneficial to use a good No. 1 vehicle speed sensor to test multiple No. 2 sensors.

[0033] This application staggers the initial positions of vehicle speed sensors #1 and #2, specifically, the initial position of vehicle speed sensor #1 faces the tooth tip. This way, in each cycle, the high level of vehicle speed sensor #1 corresponds to the low level of vehicle speed sensor #2. Since vehicle speed sensor #1 is functioning correctly, assuming one cycle is a sawtooth wave, when the peak voltage of vehicle speed sensor #1 in the first cycle is 120V (i.e., the high level value is 120V), the corresponding low level value of vehicle speed sensor #2 is 1. In the second cycle, the high level value of vehicle speed sensor #1 is 120V, and the corresponding low level value of vehicle speed sensor #2 is 0. At this point, vehicle speed sensor #2 is determined to be faulty.

[0034] The No. 1 vehicle speed sensor has undergone aging tests and has not shown any damage. Therefore, the No. 1 vehicle speed sensor is used to test whether the No. 2 vehicle speed sensor is damaged.

[0035] Specific Implementation Method Two: This implementation method further defines the coaxial synchronous asynchronous vehicle speed sensor aging device described in Specific Implementation Method One. In this implementation method, the device also includes a housing.

[0036] The housing encloses n+1 gears, and holes are provided on the housing for housing the first vehicle speed sensor and the second vehicle speed sensor, so that the first vehicle speed sensor and the n second vehicle speed sensors each correspond to one gear.

[0037] In this embodiment, the purpose of setting up the housing is to fix the vehicle speed sensor. All vehicle speed sensors are fixed in place, with a gap between them and the gears that collect data. When the motor is activated, it drives all gears to rotate synchronously, thereby relying on their respective vehicle speed sensors to detect their corresponding gears.

[0038] Specific implementation method three: Combining Figure 2 This embodiment describes an aging device for a coaxial, synchronous, asynchronous vehicle speed sensor. The device includes a motor, m vehicle speed sensors, m gears, and a detection unit, where m is a positive integer.

[0039] All m gears are mounted on the motor shaft. When the motor is working, it drives the m gears to rotate synchronously.

[0040] The initial state of the acquisition port of each vehicle speed sensor is aligned with the tip of a tooth of a gear;

[0041] Each vehicle speed sensor is used to collect the continuous level cycle during the rotation of the corresponding gear in real time. The level cycle is time on the horizontal axis and voltage amplitude on the vertical axis. The voltage amplitude includes low level and high level. The vehicle speed sensor outputs a high level when it is facing the tip of the gear tooth and a low level when it is facing the space between the gear teeth.

[0042] The detection unit is used to collect the continuous level cycle output by m vehicle speed sensors, and determine whether each level cycle of each vehicle speed sensor is the same as the preset level cycle. If so, the corresponding vehicle speed sensor is determined to be normal; otherwise, the corresponding vehicle speed sensor is determined to be damaged.

[0043] In this embodiment, it is assumed that one cycle is a sawtooth wave and there are 100 voltage values ​​in one cycle. Then there are also 100 voltage values ​​in the set cycle. The 100 voltage values ​​of each vehicle speed sensor in each cycle are compared one-to-one with the 100 voltage values ​​in the set cycle. If there is a difference, it means that the vehicle speed sensor is damaged.

[0044] The stability of multiple voltage levels output by a vehicle speed sensor can be determined by using preset values. If all the cycles of a vehicle speed sensor are the same, that is, if the vehicle speed sensor can clearly collect the tooth tips and the space between the teeth during the rotation of the gear, it means that the vehicle speed sensor is functioning normally. Therefore, the stability of the cycle waveform can be used to determine whether the vehicle speed sensor is damaged.

[0045] Specific Implementation Method Four: This implementation method further defines the coaxial, synchronous frequency, asynchronous vehicle speed sensor aging device described in Specific Implementation Method Three. In this implementation method...

[0046] The detection unit is also used to detect whether the same abnormal waveform exists in each level cycle of the output of each vehicle speed sensor. If so, it is determined that there is foreign matter or dust on the gear corresponding to the corresponding vehicle speed sensor. If not, it is determined that there is no foreign matter or dust on the gear corresponding to the corresponding vehicle speed sensor.

[0047] In this embodiment, for example, if the aging method of Specific Embodiment Three detects that a vehicle speed sensor is not damaged, then we continue to examine the output level cycle of this vehicle speed sensor to see if the same abnormal waveform appears in each cycle. For example, when there are no foreign objects, the high-level voltage amplitude is 5 and the low-level voltage amplitude is -5 in each cycle; when there are foreign objects on the gear, waveforms with a high-level voltage amplitude of 2 and a low-level voltage amplitude of -2 appear in each cycle, indicating that the vehicle speed sensor detected foreign objects again during the detection cycle of one gear revolution, so a waveform with foreign objects appeared in one cycle. Therefore, this application can also detect whether there are foreign objects or dust on the gear.

[0048] Specific Implementation Method Five: This implementation method further defines the coaxial synchronous asynchronous vehicle speed sensor aging device described in Specific Implementation Method Three. In this implementation method, the device also includes a housing.

[0049] The housing encloses m gears, and holes are provided on the housing to accommodate m vehicle speed sensors, so that one vehicle speed sensor corresponds to one gear.

[0050] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. An aging device for a coaxial, synchronous, asynchronous vehicle speed sensor, characterized in that, The device includes a motor, a first vehicle speed sensor, n second vehicle speed sensors, n+1 gears, and a detection unit, where n is a positive integer; All n+1 gears are mounted on the motor shaft. When the motor is working, it drives the n+1 gears to rotate synchronously. The initial state of the acquisition port of vehicle speed sensor No. 1 is aligned with the tip of a tooth of a gear, and the initial state of the acquisition port of each vehicle speed sensor No. 2 is aligned with a tooth of a gear; vehicle speed sensor No. 1 and n vehicle speed sensors No. 2 are all on the same gear; vehicle speed sensor No. 1 is a standard vehicle speed sensor. The No. 1 vehicle speed sensor is used to collect the continuous level period during the rotation of the corresponding gear. The level period is time on the horizontal axis and voltage amplitude on the vertical axis. The voltage amplitude includes low level and high level. The No. 1 vehicle speed sensor outputs a high level when it is facing the tip of the gear tooth and outputs a low level when it is facing the space between the gear teeth. Each speed sensor is used to collect the continuous level period during the rotation of the corresponding gear. The level period is plotted with time on the x-axis and voltage amplitude on the y-axis. The voltage amplitude includes low level and high level. The speed sensor outputs a high level when it is facing the tip of the gear tooth and a low level when it is facing the space between the gear teeth. The detection unit is used to collect the continuous level cycle output of vehicle speed sensor No. 1 and n vehicle speed sensors No. 2, establish a one-to-one correspondence table between the high level value output by vehicle speed sensor No. 1 and the low level value output by vehicle speed sensor No. 2 under the same level cycle, and determine whether the low level value of each vehicle speed sensor No. 2 corresponding to the same high level value of vehicle speed sensor No. 1 in the correspondence table is the same. If not, it is determined that the vehicle speed sensor No. 2 corresponding to different low level values ​​is damaged. If so, it is determined that all n vehicle speed sensors No. 2 are normal.

2. The coaxial, synchronous frequency, asynchronous vehicle speed sensor aging device according to claim 1, characterized in that, The device also includes a housing. The housing encloses n+1 gears, and holes are provided on the housing for housing the first vehicle speed sensor and the second vehicle speed sensor, so that the first vehicle speed sensor and the n second vehicle speed sensors each correspond to one gear.

3. An aging device for a coaxial, synchronous, asynchronous vehicle speed sensor, characterized in that, The device includes a motor, m vehicle speed sensors, m gears, and a detection unit, where m is a positive integer; All m gears are mounted on the motor shaft. When the motor is working, it drives the m gears to rotate synchronously. The initial state of the acquisition port of each vehicle speed sensor is aligned with the tip of a tooth of a gear; Each vehicle speed sensor is used to collect the continuous level cycle during the rotation of the corresponding gear in real time. The level cycle is time on the horizontal axis and voltage amplitude on the vertical axis. The voltage amplitude includes low level and high level. The vehicle speed sensor outputs a high level when it is facing the tip of the gear tooth and a low level when it is facing the space between the gear teeth. The detection unit is used to collect the continuous level cycle output by m vehicle speed sensors, and determine whether each level cycle of each vehicle speed sensor is the same as the preset level cycle. If so, the corresponding vehicle speed sensor is determined to be normal; otherwise, the corresponding vehicle speed sensor is determined to be damaged.

4. The coaxial, synchronous frequency, asynchronous vehicle speed sensor aging device according to claim 3, characterized in that, The detection unit is also used to detect whether the same abnormal waveform exists in each level cycle of the output of each vehicle speed sensor. If so, it is determined that there is foreign matter or dust on the gear corresponding to the corresponding vehicle speed sensor. If not, it is determined that there is no foreign matter or dust on the gear corresponding to the corresponding vehicle speed sensor.

5. The coaxial, synchronous frequency, asynchronous vehicle speed sensor aging device according to claim 3, characterized in that, The device also includes a housing. The housing encloses m gears, and holes are provided on the housing to accommodate m vehicle speed sensors, so that one vehicle speed sensor corresponds to one gear.

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