CN209327593U - Gyroscope type acceleration of gravity measuring instrument - Google Patents

Abstract

The utility model discloses a kind of gyroscope type acceleration of gravity measuring instruments, the special iron stand of three from left to right distinguishes fixed laser transmitter, special gyro and solenoid, photosensitive sensor are symmetrically installed that there are two small magnetic sheets on special gyro, photosensitive sensor and built-in power form ball bearing made, in gyroscopic procession, the rotational velocity and precessional evlocity of gyro are measured simultaneously, by derivation formula, known gyro parameter, can be calculated local gravitational acceleration.This gyroscope type acceleration of gravity measuring instrument calculates local gravitational acceleration by the way of measurement electric voltage frequency variation, and measuring principle used is reasonable, and measurement process is easy, while measured data precision is high, and it is smaller to calculate gained acceleration of gravity error.

Description

Gyroscope type acceleration of gravity measuring instrument

Technical field

The utility model relates to a kind of acceleration of gravity measuring device, it is especially a kind of by electric current caused by measuring or The acceleration of gravity measuring device of electric voltage frequency.

Background technique

Existing acceleration of gravity measuring instrument, such as the Chinese utility model patent of Publication No. CN206178168U, benefit Principle be measure object free-falling time and distance, exist influenced by operation level, measuring instrument precision it is not high Restriction, the acceleration of gravity accuracy measured is difficult to ensure.

In addition, often cost of manufacture is excessively high for the high measuring instrument of existing accuracy, by the sensor and chip of a variety of precisions, Be unfavorable for volume production investment teaching with it is civilian.

Utility model content

In order to solve the contradiction that both existing acceleration of gravity measuring instrument accuracy of measurement and cost are unable to have both at one and the same time, this is practical It is novel that a kind of device changed by electric voltage frequency while measuring the spin velocity of gyro and precessional evlocity under precession is provided, By formula and known parameters, local gravitational acceleration is calculated.

A kind of gyroscope type acceleration of gravity measuring instrument, including fixed pan, oscillograph, special iron stand A, special brandreth Laser emitter is installed on platform B, special iron stand C, special iron stand A, hanging rope, special top are installed on special iron stand B Spiral shell, magnetic sheet are equipped with built-in power, photosensitive sensor on special iron stand C, it is characterised in that: three iron stands are along same Horizontal line is fixed on fixed pan, solenoid is fixed on special iron stand B, built-in power, photosensitive sensor composition is simply Circuit, oscillograph are installed on the other side of the fixed pan far from three iron stands, are provided with probe A, probe B.

Above-mentioned gyroscope type acceleration of gravity measuring instrument, the laser that laser emitter issues are and special under precession state Gyro, photosensitive sensor in the same horizontal line, constitute the optical path periodically blocked.

Above-mentioned gyroscope type acceleration of gravity measuring instrument, oscillograph are provided with channel 1, channel 2, are separately connected probe A, visit Head B, probe A connect the solenoid below gyro, the electric voltage frequency variation that measurement gyro rotation generates, and probe B connects photosensitive biography The both ends of sensor, the electric voltage frequency variation that measurement gyroscopic procession generates.

Above-mentioned gyroscope type acceleration of gravity measuring instrument, symmetrically fixed on the wheel disc of the special gyro there are two big Small, shape, the identical magnetic sheet of material can generate periodically variable magnetic flux in rotation, so that probe A be made to measure Electric voltage frequency generating period variation.

Above-mentioned gyroscope type acceleration of gravity measuring instrument, due to the precession of special gyro, the laser of laser transmitter projects Gyro can be tailored periodically to block, the laser that photosensitive sensor receives is also the periodically thus electricity of photosensitive sensor Size meeting generating period variation is hindered, thus the electric voltage frequency generating period variation for measuring probe B.

Above-mentioned gyroscope type acceleration of gravity measuring instrument, the angular speed of special gyro rotation is corresponding with the angular speed of precession to be produced The variation of raw electric voltage frequency, and be simultaneously displayed on oscillograph, oscillograph while storing data read oscillograph by computer The electric voltage frequency delta data of measurement can obtain the specific value of special gyro spin velocity and angular velocity of precession.

Above-mentioned gyroscope type acceleration of gravity measuring instrument, acceleration of gravity, which calculates, is based on formula, After the numerical value for measuring spin velocity and angular velocity of precession, by known special gyro, it is used that rotation is calculated in the attribute of magnetic sheet Amount, measures gyro mass center to axis bottom end distance, it can be deduced that the numerical value of local gravitational acceleration.

The utility model has the beneficial effects that cost is relatively low for device used by the utility model, principle is simple, is suitble to Voluntarily assembling and teaching, simultaneously as the real-time and high-precision of electric voltage frequency measurement, ensure that the accurate of measured data Property, to keep the error for calculating resulting acceleration of gravity smaller.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is utility model diagram；

Fig. 2 is special gyro and magnetic sheet position view；

Fig. 3 is photosensitive sensor, the simple electricity that built-in power is connected with oscillograph；

Fig. 4 is gyroscopic procession schematic diagram.

1. fixed pan in Fig. 1,2. oscillographs, 3. special iron stand A, 4. laser emitters, 5. special iron stand B, 6. Hanging rope, 7. special gyros, 8. magnetic sheets, 9. solenoids, 10. probe As, 11. special iron stand C, 12. built-in powers, 13. photosensitive biographies Sensor, 14. probe Bs.

Specific embodiment

[embodiment 1]

Gyroscope type acceleration of gravity measuring instrument includes fixed pan 1, oscillograph 2, special iron stand A3, special iron stand Laser emitter 4 is installed on B5, special iron stand C10, special iron stand A3, hanging rope 6 is installed on special iron stand B5, it is special Gyro 7 processed, magnetic sheet 8 are equipped with built-in power 12, photosensitive sensor 13 on special iron stand C11, and laser emitter 4 is emitted Laser and special gyro 7, photosensitive sensor 13 on same straight line, special gyro 7 is suspended on special brandreth by hanging rope 6 Under platform B5, such as Fig. 1, three iron stands are fixed on fixed pan 1 along same horizontal line, such as Fig. 2, on special gyro 7 two A magnetic sheet 8 is symmetrically disposed on the wheel disc of gyro, and solenoid 9, built-in power 12, photosensitive biography are fixed on special iron stand B5 Sensor 13 forms ball bearing made, and ball bearing made is as shown in figure 3, oscillograph 2 is installed on fixed pan 1 far from the another of three iron stands Side is provided with probe A 10, probe B 14, is separately connected channel 1, the channel 2 of oscillograph, and the other end connects solenoid 9, photosensitive The two sides of resistor 13.

[embodiment 2]

It checking the position of all appts, opens oscillograph 2, channel 1 and channel 2 are opened in selection, laser emitter 4 is opened, The switch for opening the built-in power 12 of 13 place circuit of photosensitive sensor, rotates special gyro 7, gyro high-speed rotation using drawstring Afterwards, gyro bottom wheel shaft is held, gyro is lifted to a suitable angle, makes that laser emitter can just be sheltered from when its precession The laser of 4 transmittings, looses one's grip, as shown in figure 4, gyro starts precession at this time, the symmetrical magnetic sheet 8 installed on special gyro 7 causes The cyclically-varying of magnetic flux produces periodic induced voltage by electromagnetic induction principle in solenoid 9, probe A 10 will be surveyed Voltage change pass oscillograph 2 back, the voltage change period is identical with the gyro rotation period, meanwhile, periodicity when gyroscopic procession The laser that laser emitter 4 is issued is blocked, so that the variation of the resistance value generating period of photosensitive sensor 13, makes probe B 14 It has measured periodic voltage and has passed oscillograph 2 back, the voltage change period is identical as the precession period of gyro, the display of oscillograph 2 Screen display goes out the curve that two electric voltage frequencies change over time, and the frequency of 1 voltage change of channel is the rotation of special gyro The frequency of speed, 1 voltage change of channel is the precessional evlocity of special gyro, it is known that formula, rotation Measured data are substituted into computer and calculated, local gravity can be obtained by inertia I, quality m, gyro mass center to axis bottom end distance d Acceleration.

Claims (4)

1. a kind of gyroscope type acceleration of gravity measuring instrument, including fixed pan (1), oscillograph (2), special iron stand A (3) are special Iron stand B (5) processed, special iron stand C (11) are equipped with laser emitter (4) on special iron stand A (3), special iron stand B (5) it is equipped on hanging rope (6), special gyro (7), magnetic sheet (8), built-in power (12), light is installed on special iron stand C (11) Dependent sensor (13), it is characterised in that: three iron stands are fixed on fixed pan (1) along same horizontal line, special brandreth It is fixed on platform B (5) solenoid (9), built-in power (12), photosensitive sensor (13) forms ball bearing made, oscillograph (2) installation In the other side of fixed pan (1) far from three iron stands, it is provided with probe A (10), probe B (14).

2. gyroscope type acceleration of gravity measuring instrument according to claim 1, which is characterized in that laser emitter (4) issues Laser, and the special gyro (7) under precession state, photosensitive sensor (13) in the same horizontal line, constitutes and periodically blocks Optical path.

3. gyroscope type acceleration of gravity measuring instrument according to claim 2, which is characterized in that oscillograph (2) is provided with frequency Road 1, channel 2 are separately connected probe A (10), probe B (14), and probe A (10) connects the solenoid (9) below gyro, measure top The electric voltage frequency variation that spiral shell rotation generates, probe B (14) connect the both ends of photosensitive sensor (13), and measurement gyroscopic procession generates Electric voltage frequency variation.

4. gyroscope type acceleration of gravity measuring instrument according to claim 3, which is characterized in that the special gyro (7) It symmetrically fixes on wheel disc there are two size, shape, the identical magnetic sheet of material (8) can generate periodical change in rotation The magnetic flux of change, thus the electric voltage frequency generating period variation for measuring probe A (10).