Running condition simulation device of speed sensor

Abstract

The utility model discloses a running condition simulation device of a speed sensor, which comprises a driving fan and an air pipe, a plurality of power convex ribs are uniformly arranged on the fan surface of the driving fan, the air outlet of the air pipe is arranged towards the side walls of the power convex ribs, and the upstream of the air pipe is communicated with an air compressor; the first end of the transmission shaft is fixedly connected with the center of the driving fan, the second end of the transmission shaft is fixedly connected with the center of the testing part so as to drive the testing part to rotate at a first preset rotating speed when the driving fan rotates, and the testing part is arranged towards the speed sensor. The air compressor is arranged outside a detection scene of the speed sensor, the driving fan is pneumatically driven through the air pipe, then the testing part is driven to rotate, the actual operation working condition of the speed sensor is simulated by testing the rotating speed of the testing part, and the simulation device is simple in structure, easy to set and high in practicability. And no electromagnetic noise is generated in the process of simulating the actual operation of the speed sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor equipment technical field, especially a kind of running condition simulation device of speed sensor. BACKGROUND

[0002] At present, the design trend in the field of automobile is rapidly developing towards intelligent direction, and speed sensor is an indispensable part in the process of automobile intelligent driving;Speed sensor, as an important information source of automobile electronic control system, is mainly used in automatic transmission system, cruise control system and other aspects on automobile, and can also input the driving speed of automobile to automobile instrument panel for speed display, or input the monitored speed information into automobile control system ECU to feedback the control of automobile braking, driving, fuel injection amount;The working principle of commonly used speed sensor can be roughly divided into two categories, namely electromagnetic induction type (for example: hall sensor) and photosensitive type (for example: laser reflection type), and in order to ensure that speed sensor runs in normal state when applied to automobile, electromagnetic compatibility (Electromagnetic Compatibility, EMC) test is usually needed for speed sensor, and in the test process, speed sensor is connected to the device under test (Device Under Test, DUT), that is, controller module, and power is supplied to it for running test, but speed sensor is usually not loaded with speed tooling for simulation live test to avoid unnecessary electromagnetic noise generated by speed tooling to affect the radiation emission and anti-interference performance of DUT, which avoids unnecessary electromagnetic noise, but speed sensor is not completely tested in actual working environment, which may cause running error in actual running process.

[0003] Therefore, how to improve the similarity between speed sensor test environment and actual running environment, and avoid the influence of electromagnetic noise, is a problem that needs to be solved by those skilled in the art. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims at providing a kind of running condition simulation device of speed sensor to improve the similarity between speed sensor test environment and actual running environment, and avoid the influence of electromagnetic noise.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A kind of running condition simulation device of speed sensor, comprising:

[0007] Driving fan and air pipe, the fan surface of the driving fan is uniformly provided with several power ribs, the air outlet of the air pipe is arranged towards the side wall of the power rib, and the upstream of the air pipe is communicated with air compressor.

[0008] a transmission shaft, a first end of the transmission shaft is fixedly connected with the center of the driving fan, a second end of the transmission shaft is fixedly connected with the center of the testing part, so as to drive the testing part to rotate at a first preset rotating speed when the driving fan rotates, the testing part is arranged towards the speed sensor.

[0009] Preferably, in the operation condition simulation device of the speed sensor, a rack for bearing is further included, the rack includes a rotatingly connected base and a supporting rod, the supporting rod can be rotated to at least positions parallel and perpendicular to the base;

[0010] The transmission shaft is fixedly arranged on the supporting rod through a connecting rod, and the air pipe is arranged through the supporting rod.

[0011] Preferably, in the operation condition simulation device of the speed sensor, the testing part is a testing gear, the supporting rod is arranged perpendicular to the base, at least one gear tooth of the testing gear is made of magnet material to cause magnetic gap change in the rotating process and to cause induced electromotive force in the probe coil of the speed sensor.

[0012] Preferably, in the operation condition simulation device of the speed sensor, the testing part is a light shielding disc, the supporting rod is arranged parallel to the base, a light transmission hole is formed in the light shielding disc, and a back light source is periodically transmitted from the light transmission hole to be detected by a phototube of the speed sensor in the rotating process of the light shielding disc.

[0013] Preferably, in the operation condition simulation device of the speed sensor, the supporting rod is a telescopic rod structure capable of telescoping along the axial direction thereof.

[0014] Preferably, in the operation condition simulation device of the speed sensor, the driving fan is in a disc configuration, the power protruding ribs are in arc structures and are uniformly arranged along the center of the driving fan.

[0015] Preferably, in the operation condition simulation device of the speed sensor, one end of the transmission shaft penetrates out of the driving fan and is fixedly arranged with a wind shielding disc, the power protruding ribs are arranged on a side of the driving fan towards the wind shielding disc, and the air outlet of the air pipe is located between the driving fan and the wind shielding disc.

[0016] Preferably, in the operation condition simulation device of the speed sensor, a throttle valve with adjustable valve opening degree is arranged between the air compressor and the air outlet of the air pipe.

[0017] Preferably, in the operation condition simulation device of the speed sensor, the driving fan, the transmission shaft and the testing part are all made of polyethylene plastic.

[0018] Preferably, in the operating condition simulation device of the speed sensor, the support rods are arranged in parallel and spaced apart.

[0019] From the above technical solution, the operating condition simulation device of the speed sensor provided by the utility model, including drive fan, air pipe, transmission shaft and test part, wherein, drive fan is the structural component that can rotate under the pneumatic action, specifically, a plurality of power convex ribs of convex fan surface are arranged on the fan surface of drive fan, the air outlet of air pipe is arranged towards the side wall of power convex rib, and the upstream front end of air pipe is communicated with air compressor. When the air compressor supplies air to the air pipe, the air outlet of the air pipe sprays gas and pushes the power convex rib to drive the drive fan to rotate, and it needs to be noted that the power convex rib is preferably arranged uniformly on the fan surface of the drive fan, so that the drive fan rotates stably under uniform stress in the process of continuous air injection; the transmission shaft is used for motion transmission, specifically, the first end of the transmission shaft is fixedly connected with the center of the drive fan, and the second end is fixedly connected with the center of the test part, so as to drive the test part to rotate when the drive fan is driven to rotate by air flow, and by adjusting the output parameter of the air compressor, the drive fan can drive the test part to rotate at a first preset rotating speed, and the test part is arranged towards the speed sensor to simulate the actual operating condition of the speed sensor. The operating condition simulation device of the speed sensor provided by the utility model drives the test part to rotate by pneumatic method, so as to provide the detection object under the operating state for the detection of the speed sensor, and the detection process is closer to the actual operating condition, specifically, the air compressor of the external device sprays air to the power convex rib on the drive fan through the air pipe, so that the drive fan rotates, and the drive fan drives the test part to rotate synchronously through the transmission shaft, and the test part is arranged towards the speed sensor, the speed sensor detects the speed of the test part under the rotating state to simulate the actual operating condition detection, and the air flow output state of the air compressor can realize the change of the rotating speed of the test part, and the state suitable for detection is adjusted. The structure of the simulation device is relatively simple, the test part is driven to rotate by single-stage transmission, the volume is small and easy to set in various test scenes, the power component is air compressor, and remote setting can be realized through the air pipe, so as to avoid the influence of other electromagnetic noise on the radiation emission and anti-interference performance of the measured equipment during the simulation of the actual operating condition environment. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the premise of the drawings.

[0021] Figure 1 The vertical state schematic view of the simulation device support rod and the base provided by the embodiment of the present application is shown in the figure.

[0022] Figure 2 The parallel state schematic view of the simulation device support rod and the base provided by the embodiment of the present application is shown in the figure.

[0023] Figure 3 The driving fan and test part transmission schematic view is shown in the figure.

[0024] Figure 4 The light shielding plate structure schematic view is shown in the figure.

[0025] Figure 5 The application scene schematic view of the simulation device provided by the embodiment of the present application is shown in the figure.

[0026] Among them, 10-driving fan;110-power convex rib;20-air pipe;30-air compressor;40-transmission shaft;510-test gear;520-shading disc;5210-light transmission hole;610-base;620-support rod;630-connecting rod;70-windshield;80-throttle valve. DETAILED DESCRIPTION

[0027] The core of the present application is to disclose a kind of running condition simulation device of speed sensor, to improve the similarity of speed sensor test environment and actual operating environment, and avoid the influence of electromagnetic noise

[0028] In order to make those skilled in the art better understand the present application, the following will describe the embodiments of the present application with reference to the drawings, and in addition, the embodiments shown below do not have any limiting effect on the content of the application claimed in the claims. In addition, the entire content represented by the following embodiments is not limited to the solutions necessary for the application claimed in the claims.

[0029] As Figures 1-5The speed sensor running condition simulation device provided by the embodiment of the utility model is suitable for EMC electromagnetic compatibility environment, ordinary shielding room and semi-wave darkroom, specifically, the speed sensor comprises a driving fan 10, an air pipe 20, a transmission shaft 40 and a test part, wherein the driving fan 10 is a structural component capable of rotating under the action of air power, specifically, a plurality of power convex ribs 110 protruding from the fan surface of the driving fan 10 are arranged on the fan surface of the driving fan 10, the air outlet of the air pipe 20 is arranged towards the side wall of the power convex rib 110, and the upstream front end of the air pipe 20 is communicated with an air compressor 30.

[0030] It should be noted that the power convex ribs 110 are preferably uniformly arranged on the fan surface of the driving fan 10, so that the driving fan 10 uniformly bears force and stably rotates during the continuous air injection of the air pipe 20; the transmission shaft 40 is used for motion transmission, specifically, the first end of the transmission shaft 40 is fixedly connected with the center of the driving fan 10, and the second end is fixedly connected with the center of the test part, so that the test part is driven to rotate when the driving fan 10 is driven to rotate by the airflow, and the test part is arranged towards the speed sensor, so that the speed sensor can test the rotating speed to simulate the actual running condition of the speed sensor.

[0031] The speed sensor running condition simulation device provided by the embodiment of the utility model drives the test part to rotate in a pneumatic manner, so as to provide a detection object in a running state for the detection of the speed sensor, and the detection process is closer to the actual running condition, specifically, the air compressor 30 of the external device sprays air to the power convex rib 110 on the driving fan 10 through the air pipe 20, so that the driving fan 10 rotates, and the driving fan 10 drives the test part to synchronously rotate through the transmission shaft 40, and the test part is arranged towards the speed sensor, the speed sensor simulates the actual running condition detection by detecting the rotating speed of the test part in the rotating state, and the rotating speed of the test part can be changed by adjusting the airflow output state of the air compressor 30, and the test part is adjusted to a state suitable for detection, the structure of the simulation device is relatively simple, the test part is driven to rotate through single-stage transmission, the simulation device is small in size and easy to set in various test scenes, the power component is the air compressor 30, and the air compressor 30 can be remotely arranged through the air pipe 20, so that the influence of other electromagnetic noise on the radiation emission and anti-interference performance of the measured equipment during the simulation of the actual working condition environment is avoided.

[0032] In order to further optimize the above technical solution, for example, Figure 1 and Figure 2As shown, the simulation device provided in this embodiment of the present invention also includes a frame for supporting other components and maintaining the device in a stable position. The frame specifically includes a base 610 and a support rod 620, and the base 610 and the support rod 620 are rotatably connected. The connection can be made by hinges, shafts, etc., so that the support rod 620 can rotate to at least a position parallel to and perpendicular to the base 610. The drive shaft 40 is fixedly mounted on the support rod 620 through a connecting rod 630, so that the drive fan 10 and the test part are connected to the support rod 620 as an integral structure. The purpose of the relative rotation between the support rod 620 and the base 610 is to drive the test part to change its position, which is suitable for testing different types of speed sensors. The air tube 20 passes through the support rod 620, so that the air tube 20 can also move with the rotation of the support rod 620 and maintain a stable relative position with the drive fan 10 to achieve stable driving of the drive fan 10.

[0033] As mentioned in the above embodiments, the support rod 620 is rotatably configured relative to the base 610 so as to be able to rotate to at least a position parallel to and perpendicular to the base 610, in order to adapt to the structural form of commonly used speed sensors, such as... Figure 1 As shown, in some embodiments of this utility model, it is necessary to test a commonly used electromagnetic induction speed sensor. In this case, the testing unit is a test gear 510. To meet testing requirements, the test gear 510 is preferably made of polyethylene plastic material, and at least one tooth of the test gear 510 is made of magnetic material. The support rod 620 is set perpendicular to the base 610 so that the test gear 510 remains parallel to the base 610. During rotation, the magnetic tooth periodically faces the speed sensor. Based on this structure, when the drive fan 10 is pneumatically driven, the test gear 510 rotates, and its magnetic tooth periodically rotates, causing a change in the magnetic gap. This change is induced by the probe coil of the speed sensor, generating an electromotive force. The amplitude of the induced electromotive force is related to the rotational speed; the higher the rotational speed, the higher the output voltage. The output frequency is proportional to the rotational speed. The rotational speed of the test gear 510 is thus detected and compared with the actual operating speed. The preferred testing environment for this structure is a shielded room or a semi-anechoic chamber to provide a good shielding environment for the speed detection of the test gear 510.

[0034] like Figure 2 As shown, in some other embodiments of this utility model, it is necessary to test a commonly used photosensitive speed sensor. The corresponding testing environment is a semi-electro-shielded anechoic chamber. In this case, the testing unit is a light-shielding disc 520 with light-shielding paper attached. Meanwhile, as... Figure 4As shown, the disc surface of the light shielding disc 520 is provided with light transmission holes 5210, at this time the support rod 620 is rotated to a position parallel to the base 610, so that the disc surface of the light shielding disc 520 can be perpendicular to the base 610, and is arranged towards the speed sensor through the disc surface, on the basis of this structure, when the driving fan 10 is driven by air, the light shielding disc 520 rotates, the line light source arranged on the side of the light shielding disc 520 away from the speed sensor is shielded by the light shielding disc 520, and when passing through the light transmission hole 5210, the light is detected and received by the photoelectric tube in the double speed sensor, the rotation speed of the light shielding disc 520 is adjusted by adjusting the output of the air compressor 30, and the speed sensor detects and records the time interval of the light passing through the light transmission hole 5210, and the rotation speed of the light shielding disc 520 is calculated in combination with the opening position and number of the light transmission hole 5210, and is compared with the actual rotation speed of the light shielding disc 520.

[0035] In order to make the simulation device provided by the embodiment of the utility model applicable to more speed sensor test environments, the support rod 620 is designed as a telescopic rod structure capable of telescoping along the axial direction, which includes an inner cylinder and an outer cylinder capable of relative sliding, the inner cylinder is connected with the base 610, and the transmission shaft 40 is fixedly arranged on the outer cylinder through the connecting rod 630, the relative sliding of the outer cylinder relative to the inner cylinder drives the test part to change position along the axial direction of the support rod 620, so as to obtain a certain adjustment freedom, such as changing the height of the test part or the horizontal distance from the speed sensor, and adapt to more speed sensor test scenes.

[0036] Further, in a specific embodiment of the utility model, in order to improve the air-driven effect of the air pipe 20 on the driving fan 10, the driving fan 10 is designed as a disc structure, the power protruding ribs 110 are designed as arc structures, and are uniformly arranged along the center of the driving fan 10, and the arc recesses are arranged towards the air outlet position of the air pipe 20, so that the power protruding ribs 110 have a larger contact area with the airflow, and the air pipe 20 is conveniently and stably driven.

[0037] On the basis of the above embodiment, one end of the transmission shaft 40 is fixed with the center of the driving fan 10 and is arranged out of the driving fan 10, and a wind shield 70 is fixedly arranged at this end position, the wind shield 70 is arranged parallel to the driving fan 10, the power protruding ribs 110 on the driving fan 10 are arranged on the side of the driving fan 10 towards the wind shield 70, and the air outlet of the air pipe 20 is located between the driving fan 10 and the wind shield 70, the advantage of this structure is that the airflow discharged from the air outlet of the air pipe 20 will not dissipate away from the power protruding ribs 110, but will be guided by the wind shield 70 and the driving fan 10, and most of the impact power protruding ribs 110 drive the driving fan 10, thereby improving the air-driven effect.

[0038] Further, in order to more accurately adjust the compressed air to accurately adjust the actual rotating speed of the test part to realize the simulation of the actual working condition, as shown in Figure 5 The air compressor 30 and the air outlet of the air pipe 20 are provided with a throttle valve 80 with adjustable valve opening, the throttle valve 80 accurately adjusts the rotating speed of the test part through the fine adjustment of the valve opening, until the test rotating speed requirement is reached, the real working condition environment is realized, and then the test experiment of the speed sensor is carried out.

[0039] Further, in the running working condition simulation device of the speed sensor provided in the embodiment of the utility model, the material of the driving fan 10, the transmission shaft 40 and the test part is polyethylene plastic material with dielectric constant less than 4, which saves the cost and does not cause too large influence on the electromagnetic wave propagation in the space, and does not affect the test result.

[0040] In order to ensure that the transmission shaft 40 can be stably fixed on the connecting rod 630, avoid the shaking in the rotating process of the connecting rod 630 to affect the stability of the test part, in some embodiments of the utility model, the supporting rod 620 is provided at least two, and the two supporting rods 620 are parallel and spaced, and more preferably, the two supporting rods 620 are arranged on the two sides of the driving fan 10.

[0041] The terms "first", "second", "left side" and "right side" and the like in the description and claims of the utility model and the above drawings are used to distinguish different objects, and are not used to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can include steps or units not listed.

[0042] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An operating condition simulation device for a speed sensor, characterized by, The utility model relates to a kind of test device for speed sensor, including: Driving fan and air pipe, the fan surface of the driving fan is evenly provided with several power ribs, the air outlet of the air pipe is towards the side wall of the power rib, and the upstream of the air pipe is communicated with air compressor; Transmission shaft and test part, the first end of the transmission shaft is fixedly connected with the center of the driving fan, the second end of the transmission shaft is fixedly connected with the center of the test part, to drive the test part to rotate at first preset rotating speed when the driving fan rotates, the test part is towards speed sensor.

2. The operating condition simulation apparatus of a speed sensor according to claim 1, wherein It also includes a rack for bearing, the rack includes a rotatingly connected base and support rod, the support rod can be rotated to at least parallel and perpendicular position with the base; The transmission shaft is fixedly arranged on the support rod by connecting rod, and the air pipe is arranged through the support rod.

3. A speed sensor operating condition simulation apparatus as claimed in claim 2, wherein, The test part is test gear, the support rod is arranged perpendicular to the base, and at least one gear tooth of the test gear is magnet material to cause magnetic gap change during rotation and generate induced electromotive force in probe coil of the speed sensor.

4. The operating condition simulation apparatus of a speed sensor according to claim 2, wherein The test part is light-shield disc, the support rod is arranged parallel to the base, and the light-shield disc is provided with light transmission hole, and the back light source is periodically transmitted from the light transmission hole to be detected by phototube of the speed sensor during rotation of the light-shield disc.

5. The operating condition simulation apparatus of a speed sensor according to claim 2, wherein The support rod is telescopic rod structure that can be axially telescopic.

6. The operating condition simulation apparatus of a speed sensor according to claim 1, wherein The driving fan is disc configuration, and the power rib is arc structure and evenly arranged along the center of the driving fan.

7. A speed sensor operating condition simulation apparatus as claimed in claim 6, characterised in that, One end of the transmission shaft penetrates the driving fan and is fixedly provided with wind shield, the power rib is arranged on the side of the driving fan towards the wind shield, and the air outlet of the air pipe is located between the driving fan and the wind shield.

8. The operating condition simulation apparatus of a speed sensor according to claim 1, wherein Air regulator with adjustable valve opening is arranged between the air compressor and the air outlet of the air pipe.

9. The operating condition simulation apparatus of a speed sensor according to claim 1, wherein The material of the driving fan, the transmission shaft and the test part is polyethylene plastic.

10. The operating condition simulation apparatus of a speed sensor according to claim 2, wherein The support rod is at least parallel and spaced apart two.

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