CN201974181U - Dynamic locking area tester for prismatic laser gyro - Google Patents

Abstract

The utility model relates to a dynamic locking area tester for a prismatic laser gyro, which comprises a signal receiving and processing device, a sampling and analyzing device, and a speed turntable. The measured prismatic laser gyro comprises a laser resonant cavity; the laser resonant cavity is fixed on the speed turntable; the signal receiving and processing device, the sampling and analyzing device, and the speed turntable are connected in sequence. The dynamic locking area tester for the prismatic laser gyro leads the laser resonant cavity to rotate according to a given speed by controlling the rotary turntable, receives the pulse signals of beams emitted by the laser resonant cavity and inputs the pulse signals into a singlechip through the signal receiving and processing device; the number of the pulse signals is read out by the singlechip; the number of the pulse signals and the rotating speed of the laser resonant cavity are correspondingly displaced; the dynamic locking area tester can quickly and accurately realize the test of the locking area, can improve the production efficiency more quickly, and is convenient for production and quality judgment of the laser resonant cavity.

Description

District's proving installation is dynamically locked in a kind of lens type laser gyro

[technical field]

The utility model relates to technical field of measurement and test, and district's proving installation is dynamically locked in particularly a kind of lens type laser gyro.

[background technology]

The lens type laser gyro is as a kind of laser gyro of unique types, only has a Russian family producing abroad, and what adopt for the test in lock district is that traditional manual turntable adds photelectric receiver and finishes.Two problems of main existence: 1) error is bigger, the slewing rate of turntable is manual control, be in random state fully, measuring accuracy only reaches 0.03 °/s, and also can't judge that the lock district value that causes testing out can't take a decision as to whether the lock district value of minimum for the time that minimum lock district value produces; 2) inefficiency, once the lock district is 2 hours the conservative time of test, needs a special people to observe operation in the whole process always, has wasted human resources.

[utility model content]

The purpose of this utility model provides a kind of lens type laser gyro and dynamically locks district's proving installation, to solve the problems of the technologies described above.。

To achieve these goals, the utility model adopts following technical scheme:

District's proving installation is dynamically locked in a kind of lens type laser gyro, comprises signal reception and treating apparatus, sampling and analyzing unit and rate table; Measured lens type laser gyro comprises laserresonator, and described laserresonator is fixed on the described rate table; Described signal reception is connected successively with treating apparatus, sampling and analyzing unit and rate table.

Described signal receives and treating apparatus comprises photelectric receiver, signal amplifier and rectifier filer; Described photelectric receiver, signal amplifier and rectifier filer are connected successively; Described rectifier filer connects described sampling and analyzing unit.

Described sampling and analyzing unit comprises single-chip microcomputer and display device; Described single-chip microcomputer connects described rectifier filer, display device and revolving-turret.

Described revolving-turret is the single shaft revolving-turret.

Compared with prior art, the utlity model has following advantage: the utility model is dynamically locked district's proving installation makes laserresonator rotate according to given speed by the control revolving-turret, receive by the signal receiving and processing device resonator cavity outgoing light beam pulse signal and import single-chip microcomputer, the number of single-chip microcomputer read pulse signal; The rotating speed correspondence of pulse signal number resonant cavity is shown, can realize locking the detection in district fast and accurately, can enhance productivity faster, be convenient to the quality judging of production application and laserresonator.

[description of drawings]

Fig. 1 dynamically locks the structural representation of district's proving installation for a kind of lens type laser gyro of the utility model.

[embodiment]

During lens type laser gyro operate as normal, after angular velocity of rotation was less than a certain critical value, the pulse signal of lens type laser gyro output changed no corresponding to angular velocity of rotation, and the size of this critical angular velocity is the dynamic lock district of laser gyro.

See also shown in Figure 1ly, a kind of lens type laser gyro of the utility model is dynamically locked district's proving installation and is comprised that signal receives and treating apparatus 2 (comprising photelectric receiver, signal amplifier, rectifier filer), sampling and analyzing unit 3 (single-chip microcomputer) and rate table 4.

Lens type laserresonator 1 is fixed on the single shaft rate table 4, with the power supply excitation luminescence of laserresonator 1 by adding, the P polarized light of the photelectric receiver of signal reception and treating apparatus 2 being aimed at laserresonator 1 outgoing receives light pulse signal and is converted to electric signal, the signal amplifier that is transferred to signal reception and treating apparatus 2 then amplifies about 1000 times input filtering reorganizers with the weak signal of microammeter, receive through signal again and filter out clutter with the rectifier filer for the treatment of apparatus 2 and simultaneously conversion of signals is become square-wave signal, square-wave signal is transported in the single-chip microcomputer of sampling and analyzing unit 3, single-chip microcomputer reads the umber of pulse in the square-wave signal, and, demonstrate the pulse signal and the time relation figure of laserresonator 1 outgoing P polarized light in real time with in the pulse information input picture display device.Given cosine curve (the V=V of single-chip microcomputer when turntable 4 is according to system start-up in addition ₀Cos (ω t); V ₀=10 degree/seconds; ω=0.01Hz) be rotated, be fixed on lens type laserresonator 1 on the single axle table 4 along with turntable 4 is rotated according to cosine curve, angular velocity of rotation changes according to cosine curve, when angular velocity of rotation during less than a certain critical value, the output of the P polarized light pulse-free signal of lens type laserresonator 1; When angular velocity of rotation arrives critical value, lens type laserresonator 1 output pulse signal, along with the frequency of the increase pulse signal of angular velocity of rotation is increasing, the frequency along with the reduction pulse signal of angular velocity of rotation is more and more littler again, disappears during less than critical value.The angular velocity of rotation of turntable 4 feeds back to single-chip microcomputer in real time, and single-chip microcomputer is with feedback signal input picture display device, and image display device demonstrates the curve map of turntable 4 and time in real time; Be that image display device can be in real time shows the variation relation of pulse signal, turntable angular velocity and time.By the oscillogram that display device shows, find pulse signal corresponding turntable 4 angular velocity of rotations constantly to occur, this angular velocity of rotation is that district's value is dynamically locked in tested lens type laser gyro.

Four prisms of lens type laser gyro rely on Brewster angle to realize the low loss characteristic of ring cavity, make the P polarized light incide outside the resonator cavity simultaneously, receive the P polarized light of outgoing by photelectric receiver, utilize the characteristics of laser standing wave, when ring cavity rotates, just can measure the antinode and the node of inswept what standing waves.The cavity revolution is crossed λ/2R, and (λ represents the centre wavelength of laser; R represents the cavity radius) radian, will an inswept antinode and node.In photelectric receiver, will export a pulse signal.As detected N pulse output, just show that cavity turns over the θ radian:

$\mathrm{\θ}=N\frac{\mathrm{\λ}}{2R}=\frac{\mathrm{\λL}}{4A}N$

In the formula: the radian number that on behalf of ring resonator, θ turn over; λ represents the centre wavelength of laser; L represents the optical cavity length of ring resonator; A represents the area that light path surrounded of ring cavity;

Pairing θ value obtains the radian number that gyro turns over when just pulse having occurred by detecting the output gyro, then the rotation equation V=V that sets of time that turns over according to turntable and turntable ₀The turntable rotating speed of correspondence when cos (ω t) can obtain gyro and just pulse occurred is the lock district value of gyro.

It is big that the utility model solves the error that exists in the existing measuring technique, and low precision and inefficient problem foreclose human factor, and measuring accuracy is brought up to 0.003 °/s by 0.03 ° original/s; The utility model can realize locking the detection in district fast and accurately, can enhance productivity faster, is convenient to the quality judging of production application and laserresonator.

Claims (4)

1. district's proving installation is dynamically locked in a lens type laser gyro, it is characterized in that: comprise that signal receives and treating apparatus (2), sampling and analyzing unit (3) and rate table (4); Measured lens type laser gyro comprises laserresonator (1), and described laserresonator (1) is fixed on the described rate table (4); Described signal receives and is connected successively with treating apparatus (2), sampling and analyzing unit (3) and rate table (4).

2. district's proving installation is dynamically locked in a kind of according to claim 1 lens type laser gyro, it is characterized in that: described signal receives and treating apparatus (2) comprises photelectric receiver, signal amplifier and rectifier filer; Described photelectric receiver, signal amplifier and rectifier filer are connected successively; Described rectifier filer connects described sampling and analyzing unit (3).

3. dynamically lock district's proving installation as a kind of lens type laser gyro as described in the claim 2, it is characterized in that: described sampling and analyzing unit (3) comprises single-chip microcomputer and display device; Described single-chip microcomputer connects described rectifier filer, display device and revolving-turret (4).

4. dynamically lock district's proving installation as a kind of lens type laser gyro as described in the claim 3, it is characterized in that: described revolving-turret (4) is the single shaft revolving-turret.

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