CN217587289U

CN217587289U - Calibration device of speed measuring device

Info

Publication number: CN217587289U
Application number: CN202221474798.XU
Authority: CN
Inventors: 汤承松
Original assignee: Tianjin Jiulong Industrial Technology Co ltd
Current assignee: Tianjin Jiulong Industrial Technology Co ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-10-14
Anticipated expiration: 2032-06-14

Abstract

The utility model relates to a detect technical field, specifically be a speed sensor's calibration device, the camera includes a supporting plate, the bottom four corners department of backup pad all is fixed with supporting screw, supporting screw's tail end is fixed with the shock pad. The utility model discloses a servo motor drive gyration dish rotates, the trigger plate on the gyration dish is along with the gyration dish is rotatory, during through U type piece, the trigger plate keeps off in two optical fiber sensor's centre, the system can calculate the time t that is in the light, the light blocking part of the trigger plate on the gyration dish is one section circular arc, the arc length is known to be s, can obtain the measurement linear velocity V = s/t that the trigger plate is in the light part, servo motor's rotational speed is known, the distance of optical fiber sensor light spot to servo motor shaft can be obtained through measuring, then the theoretical linear velocity V of trigger plate light blocking part is obtained in the accessible calculation, can mark the speed sensor through the fitting, thereby showing promotion the precision that tests the speed, therefore, the utility model is practical, and is suitable for extensive popularization and use.

Description

Calibration device of speed measuring device

Technical Field

The utility model relates to a detect technical field, specifically be a speed sensor's calibration device.

Background

When the impact test of a tire or a wheel is performed, the impact speed has a great influence on the test result, the impact speed needs to be measured in order to obtain an accurate test result, and in order to measure the impact speed, the impact speed is generally measured by a velocimeter in the prior art, which has the defects of low precision and incapability of accurately calibrating the velocimeter.

In order to realize accurate measurement of the impact velocity, a calibration device of a velocity measurement device is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a speed sensor's calibration device has solved the problem that proposes in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a calibration device of a speed measuring device comprises a supporting plate, wherein supporting screws are fixed at four corners of the bottom of the supporting plate, and shock pads are fixed at the tail ends of the supporting screws;

department fixed mounting has servo motor in the middle of the bottom of backup pad, servo motor's transmission shaft runs through backup pad and fixedly connected with gyration dish, the top right side fixedly connected with of gyration dish triggers the board, the top right side of backup pad is fixed with U type piece, the outer wall run through formula of U type piece is fixed with the optical fiber sensor.

As a preferred embodiment of the utility model, the top left side fixed mounting of gyration dish has the counterweight plate, the counterweight plate sets up with the trigger plate symmetry.

As a preferred embodiment of the present invention, the longitudinal position of the trigger plate is disposed in the middle of the inner cavity of the U-shaped plate.

As a preferred embodiment of the present invention, the number of the light sensors is two, two sets of the light sensors respectively penetrate through and are fixed to the top and the bottom of the U-shaped block.

As a preferred embodiment of the present invention, the top of the supporting plate has a through hole, and the transmission shaft of the servo motor penetrates through the through hole and the inner diameter of the through hole is greater than the outer diameter of the transmission shaft of the servo motor.

As a preferred embodiment of the present invention, the servo motor and the support plate are detachably fixed by a bolt.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses a calibrating device of speed sensor, it is rotatory to drive the gyration dish through servo motor, the trigger plate on the gyration dish is along with the gyration dish is rotatory, during through U type piece, the trigger plate keeps off in two optical fiber sensor's centre, the system can calculate the time t that is in the light, the part that is in the light of the trigger plate on the gyration dish is one section circular arc, the arc length is known to be s (can calculate according to the distance of optical fiber sensor light spot to servo motor shaft and the width of trigger plate and obtain), can obtain the measurement linear velocity V = s/t of trigger plate part in the light, servo motor's rotational speed is known, the distance of optical fiber sensor light spot to servo motor shaft can be obtained through measuring, then the theoretical linear velocity V of trigger plate light-blocking part is obtained in the accessible calculation, can mark speed sensor through the fit, thereby showing promotion the precision of testing the speed.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic view of the overall structure of the calibration device of the speed measuring device of the present invention;

fig. 2 is the utility model discloses speed sensor's calibration device overlook the schematic diagram.

In the figure: 1. a shock pad; 2. a support screw; 3. a support plate; 4. a servo motor; 5. a rotary disk; 6. a counterweight plate; 7. a trigger plate; 8. a U-shaped block; 9. an optical fiber sensor.

Detailed Description

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a calibration device of speed sensor, includes backup pad 3, the bottom four corners department of backup pad 3 all is fixed with supporting screw 2, the tail end of supporting screw 2 is fixed with shock pad 1, department fixed mounting has servo motor 4 in the middle of the bottom of backup pad 3, servo motor 4's transmission shaft runs through backup pad 3 and fixedly connected with gyration dish 5, the top right side fixedly connected with of gyration dish 5 triggers board 7, the top right side of backup pad 3 is fixed with U type piece 8, the outer wall run-through of U type piece 8 is fixed with optical fiber sensor 9, utilizes optical fiber sensor 9 to mark triggering board 7, then again through calculating, speed that can be accurate.

In this embodiment, the top left side fixed mounting of gyration dish 5 has counterweight plate 6, counterweight plate 6 and 7 symmetry settings of trigger plate guarantee the stability of gyration dish 5.

In this embodiment, the longitudinal position of the trigger plate 7 is arranged in the middle of the inner cavity of the U-shaped plate 8, so that the trigger plate 7 can penetrate through the U-shaped plate 8.

In this embodiment, the number of the light sensors 9 is two, the two sets of the light sensors 9 respectively penetrate and are fixed at the top and the bottom of the U-shaped block 8, and when the trigger plate 7 rotates and passes through the U-shaped block 8, the trigger plate can be blocked between the two optical fiber sensors 9, so that the receiving of optical signals can be blocked, and the light blocking time can be measured.

In this embodiment, a through hole is formed in the top of the supporting plate 3, the transmission shaft of the servo motor 4 penetrates through the through hole, and the inner diameter of the through hole is larger than the outer diameter of the transmission shaft of the servo motor 4, so that the rotation of the servo motor 4 is not affected by the supporting plate 3.

In this embodiment, servo motor 4 and backup pad 3 pass through the detachable fixed of bolt, and the maintenance is overhauld to convenient the dismantlement.

The working principle is as follows: during calibration, the servo motor 4 is stably rotated according to a set rotating speed, the theoretical linear speed V of the trigger plate 7 at the light spot irradiation position of the optical fiber sensor 9 can be calculated through the rotating speed and the distance from the light spot of the optical fiber sensor 9 to the axis of the servo motor 4, when the trigger plate 7 rotates to pass through the U-shaped block 8, the trigger plate can be blocked between the two optical fiber sensors 9, the receiving of optical signals is blocked, and the light blocking time t can be measured; the light blocking part of the trigger plate 7 on the rotary disk 5 is a section of circular arc, the arc length is known as s (which can be calculated according to the distance from the light spot of the optical fiber sensor 9 to the shaft of the servo motor 4 and the width of the trigger plate 7), and the measured linear velocity v = s/t of the light blocking part of the trigger plate 7 can be obtained;

the speed measuring device can be calibrated by changing the speed of the servo motor for many times to obtain multiple groups of data.

In addition, the utility model relates to a calibrating device of speed sensor includes the part be the parts that general standard spare or technical staff in the field know, its structure and principle all can learn through the technical manual or learn through conventional experimental method for this technical staff, in this device idle department, with all electrical parts in the aforesaid, its control computer and the power that refers to power component, electrical part and adaptation are connected through the wire, concrete connecting means, should refer to in the following theory of operation, successively work order accomplishes electric connection between each electrical part, its detailed connecting means, for the well-known technique in the field, theory of operation and process are mainly introduced to the following, do not explain electrical control.

Claims

1. The utility model provides a calibration device of speed sensor, includes backup pad (3), its characterized in that: supporting screws (2) are fixed at four corners of the bottom of the supporting plate (3), and shock pads (1) are fixed at the tail ends of the supporting screws (2);

department fixed mounting has servo motor (4) in the middle of the bottom of backup pad (3), the transmission shaft of servo motor (4) runs through backup pad (3) and fixedly connected with gyration dish (5), the top right side fixedly connected with of gyration dish (5) triggers board (7), the top right side of backup pad (3) is fixed with U type piece (8), the outer wall run-through of U type piece (8) is fixed with optical fiber sensor (9).

2. The calibration device for the speed measuring device according to claim 1, wherein: the top left side fixed mounting of gyration dish (5) has counterweight plate (6), counterweight plate (6) and trigger plate (7) symmetry set up.

3. The calibration device for the speed measuring device according to claim 1, wherein: the longitudinal position of the trigger plate (7) is arranged in the middle of the inner cavity of the U-shaped block (8).

4. The calibration device for the speed measuring device according to claim 1, wherein: the number of the optical fiber sensors (9) is two, and the two optical fiber sensors (9) penetrate through and are fixed at the top and the bottom of the U-shaped block (8) respectively.

5. The calibration device for the speed measuring device according to claim 1, wherein: the top of the supporting plate (3) is provided with a through hole, and a transmission shaft of the servo motor (4) penetrates through the through hole, and the inner diameter of the through hole is larger than the outer diameter of the transmission shaft of the servo motor (4).

6. The calibration device for the speed measuring device according to claim 1, wherein: the servo motor (4) and the support plate (3) are detachably fixed through bolts.