CN-116203282-B - Laser Doppler rotating speed calibrating device

CN116203282BCN 116203282 BCN116203282 BCN 116203282BCN-116203282-B

Abstract

The invention relates to a laser Doppler rotation speed calibration device, which belongs to the technical field of Doppler speed measurement and comprises a shell, wherein a regulating cavity is formed in the inner side of the shell, a second installation cavity is formed in one end of the regulating cavity, a third installation cavity is formed in one end, far away from the regulating cavity, of the second installation cavity, and a helium-neon laser is arranged on the inner side of the third installation cavity. The invention solves the problems that only the inner cavity of the rotary drum can be detected, laser needs to be obliquely injected into the inner cavity of the rotary drum, and the rotary drum diameter and the depth of each centrifugal machine are different, so that certain obstruction is generated for directly irradiating the rotary drum by the laser.

Inventors

ZHANG XIUJUN
Guo Zejie
ZHU CHANGSHENG
SUN JINGQI
FAN MEIQIN
XU ZHIQIANG
YAO GUOQIANG
LIAO CHUN
Cao Xianzi

Assignees

盐城市计量测试所

Dates

Publication Date: 20260508
Application Date: 20230327

Claims (4)

1. The laser Doppler rotation speed calibration device comprises a shell (1), and is characterized in that a regulating cavity (2) is formed in the inner side of the shell (1), a second installation cavity (25) is formed in one end of the regulating cavity (2), a third installation cavity (30) is formed in one end, far away from the regulating cavity (2), of the second installation cavity (25), a helium-neon laser (29) is arranged on the inner side of the third installation cavity (30), a transmitter (27) is electrically connected to one end of the helium-neon laser (29), the transmitter (27) stretches into the second installation cavity (25), a half-wave plate (26) and an acoustic light modulator (24) are sequentially arranged on the inner side of the second installation cavity (25), the cavity at one end of the second installation cavity (25) is in a funnel shape, the funnel-shaped cavity is directly communicated with the third installation cavity (30), and an air cooling mechanism is inserted into the bottom end of the third installation cavity (30); The novel solar cell module is characterized in that a first reflecting mirror (3), a second reflecting mirror (4), a second half-wave plate (5) and a first lens (17) are sequentially arranged on the inner side of the regulating cavity (2), the first reflecting mirror (3) and the second half-wave plate (5) are located at the top of the regulating cavity (2) and are rotationally connected with the inner wall of the regulating cavity (2), the second half-wave plate (5) is arranged between the first lens (17) and the first reflecting mirror (3), the second reflecting mirror (4) is located in the middle of the regulating cavity (2), an air outlet groove (22) is formed in the bottom of the inner wall of the regulating cavity (2), a second lens (23) and a photoelectric receiver (21) are arranged on the inner side of the air outlet groove (22), the photoelectric receiver (21) is arranged on a support, the support is fixed on the inner side of the air outlet groove (22), a first filter screen (19) is inserted into the bottom end of the air outlet groove (22), and one end of the second filter screen (2) far away from the mounting cavity (25) is provided with a communication groove (15); The air cooling mechanism comprises an air cooling seat (28), a driving motor (35), an air flow generating groove (36), a first filter screen (38) and fan blades (39), wherein the air flow generating groove (36) is formed in the inner side of the air cooling seat (28), the first filter screen (38) is arranged at the bottom end of the air flow generating groove (36), the driving motor (35) is arranged on the inner side of the air cooling seat (28), a fan blade (39) is connected with a rotating rod of the driving motor (35), an inclined air guide plate (31) is arranged at the inner side of a mounting cavity II (25) close to an acousto-optic modulator (24), a plurality of drying balls (37) are arranged on the inner side of the air flow generating groove (36), a plurality of small holes are formed in the inner side of the drying balls (37), the small holes are 0.03-0.05mm in diameter, a hinge seat (32) is arranged at one end of the casing (1), a hinge seat (32) is arranged on one end of the hinge seat (32), a hinge cover (33) is arranged on the hinge seat (32) and is connected with the hinge seat (33) in a horizontal position, a horizontal position matched with the hinge seat (33), the utility model discloses a device for detecting the temperature of a liquid crystal display device, including casing (1), lens, adjusting cavity (2), slide way (9) are set up on the top of mount pad (18), horizontal cover (10) is kept away from one end of casing (1) and is provided with gag lever post (11), gag lever post (11) are provided with gag lever post (11), install detection cylinder (13) on horizontal cover (14), lens one (17) is installed in the inboard of mount pad (18), the outside of mount pad (18) is provided with rubber seal, the top of mount pad (18) is provided with slider (8), slide way (9) have been seted up on the top of adjusting cavity (2), the inboard of slide way (9) and slider (8) swing joint, the inboard of casing (1) is provided with servo motor (6), the dwang fixedly connected with lead screw (7) of servo motor (6), the outside and slider (8) screw thread of lead screw (7).
2. The laser Doppler rotation speed calibration device according to claim 1, wherein the detection column (13) is placed at a position, near the communication groove (15), of the shell (1), an installation opening for communicating with the outside is reserved at the bottom end of the second installation cavity (25), and a sealing plate is clamped at the installation opening of the second installation cavity (25).
3. The laser Doppler rotation speed calibration device according to claim 2, wherein the detection column (13) is arranged at the top of the centrifuge (40), the centrifuge (40) is placed on the horizontal bearing plate (14), the inner side is rotationally connected with the rotary drum (41), the detection column (13) is arranged at the inner side of the rotary drum (41), the connecting column (42) is arranged at the bottom of the detection column (13), the linkage sleeve (43) is sleeved at the outer side of the connecting column (42), the outer side of the linkage sleeve (43) is spliced with the inner side of the rotary drum (41), the material of the linkage sleeve (43) is phenolic resin, and the linkage sleeve (43) is in a bottle plug shape.
4. The laser Doppler rotation speed calibration device according to claim 1, wherein the photoelectric receiver (21) is connected with a hardware circuit, and then the hardware circuit is connected with a computer device for processing by using a LabVIEW program, wherein the hardware circuit comprises a two-stage pre-amplifying circuit.

Description

Laser Doppler rotating speed calibrating device Technical Field The invention belongs to the technical field of Doppler speed measurement, and particularly relates to a laser Doppler rotation speed calibration device. Background The Doppler velocity measurement technology is to measure Doppler signals of trace particles passing through a laser probe and obtain velocity according to the relation between velocity and Doppler frequency, and has no interference to a flow field due to laser measurement, a wide velocity measurement range, and the highest velocity measurement precision in the world at present due to the fact that the Doppler frequency and the velocity are in linear relation and the temperature and the pressure of the point are not in relation; The conventional Doppler speed measuring equipment is designed to measure the speed of linear motion, and directly measures the rotating speed of an object to cause a plurality of problems, for example, when the rotating drum of the centrifugal equipment is overhauled and detected and calibrated, as the rotating drum of the medical centrifugal equipment is positioned in the inner cavity of the centrifugal machine, only the inner cavity of the rotating drum can be detected, laser is required to be obliquely injected into the inner cavity of the rotating drum, and as the diameter and the depth of the rotating drum of each centrifugal machine are different, the rotating drum is directly irradiated by the laser to generate a certain obstruction, so that the laser Doppler rotating speed calibrating device is provided. Disclosure of Invention The invention provides a laser Doppler rotating speed calibration device, which aims to solve the problems that the conventional Doppler speed measurement equipment is designed for measuring the speed of linear motion, and the rotating speed of an object is directly measured, for example, when the rotating drum of centrifugal equipment is overhauled, detected and calibrated, as the rotating drum of medical centrifugal equipment is positioned in the inner cavity of a centrifugal machine, only the inner cavity of the rotating drum can be detected, laser is required to be obliquely injected into the inner cavity of the rotating drum, and the diameter and the depth of the rotating drum of each centrifugal machine are different, so that the direct irradiation of the rotating drum by the laser is blocked to a certain extent. The invention provides a laser Doppler rotation speed calibration device, which comprises a shell, wherein a regulating cavity is formed in the inner side of the shell, a second installation cavity is formed in one end of the regulating cavity, a third installation cavity is formed in one end, far away from the regulating cavity, of the second installation cavity, a helium-neon laser is arranged on the inner side of the third installation cavity, one end of the helium-neon laser is electrically connected with a transmitter, the transmitter extends into the second installation cavity, a half-wave plate I and an acousto-optic modulator are sequentially arranged on the inner side of the second installation cavity, the cavity at one end of the second installation cavity is in a funnel shape, the funnel-shaped cavity is directly communicated with the third installation cavity, and an air cooling mechanism is inserted into the bottom end of the third installation cavity; The inner side of the regulating cavity is sequentially provided with a first reflecting mirror, a second half-wave plate and a first lens, the first reflecting mirror and the second half-wave plate are positioned at the top of the regulating cavity and are rotationally connected with the inner wall of the regulating cavity, the second half-wave plate is arranged between the first lens and the first reflecting mirror, the second reflecting mirror is positioned at the middle part of the regulating cavity, the bottom of the inner wall of the regulating cavity is provided with an air outlet groove, the inner side of the air outlet groove is provided with a second lens and a photoelectric receiver, the photoelectric receiver is arranged on a support, the support is fixed at the inner side of the air outlet groove, and the bottom end of the air outlet groove is inserted with a first filter screen; The one end that the regulation and control chamber kept away from installation chamber two has seted up the intercommunication groove, the detection cylinder has been placed to the position that the casing is located near the intercommunication groove, the position that the casing kept away from the intercommunication groove corresponds and has laid the detection cylinder. Through adopting above-mentioned scheme, utilize the use that detects cylinder and interlock cover, make detect cylinder and the inside rotary drum interlock of centrifuge, make the rotation condition that detects the cylinder can stretch out the outside of centrifuge and be detected, and the