CN203718323U

CN203718323U - Platform capable of automatically keeping level

Info

Publication number: CN203718323U
Application number: CN201420041029.XU
Authority: CN
Inventors: 王跃进; 俞建峰
Original assignee: Jiangnan University
Current assignee: Jiangnan University
Priority date: 2014-01-23
Filing date: 2014-01-23
Publication date: 2014-07-16
Anticipated expiration: 2024-01-23

Abstract

The utility model relates to a platform capable of automatically keeping level. The platform is applicable to acquiring a working plane in a ship which sails in rivers, lakes and seas, and the working plane constantly keeps level. The platform is provided with three legs. The platform has the advantages that the legs are arranged to form an equilateral triangle ,one of the legs has a fixed length, and the other two legs are of structures with lengths which can be changed under the driving effects of stepper motors, so that the purpose of adjusting the levelness of the platform can be achieved; a double-shaft tilt angle sensor is mounted on the back of the platform and is used as an element for detecting and transmitting signals of a level degree of the platform, values of sampled voltages in X-axis and Y-axis directions of the sensor are changed when the platform is deviated from a level position, the stepper motors on the two support legs rotate under the control of a single chip microcomputer after the values of the sampled voltages are converted by control and amplification circuits, accordingly, the lengths of the two support legs can be respectively changed, and the platform can be quickly level after being adjusted.

Description

A kind of platform of automatic maintenance level

Technical field

The utility model relates to a kind of platform of automatic maintenance level, obtains a side and remain the working plane of level in the cabin that is applicable to jolt in inclination.

Background technique

The boats and ships that navigate by water in rivers,lakes and seas, hull can wave and jolt with stormy waves, and the precision type instrument in cabin is easy to malfunctioning, and personnel can seasick and vomiting.For example, the public affair ship of water quality monitoring, the experiment porch of boat-carrying, analytical instrument, equipment much have the requirement of maintenance level; On hospital ship, for improving patient's comfort level, improve rehabilitation efficiency, also need sick bed not wave with hull and remain level.The utility model is exactly under this requirement background and the solution of a kind of simple in structure, the reliable in action proposing.

Summary of the invention

The utility model solves the technological scheme that its technical problem adopts: according to 3 how much laws determining planes, Platform Designing is become to three forms that wait long leg to become equilateral triangle to arrange, wherein one leg is fixed length, two other leg length is scalable, object is in the time of ground inclination, by stretching of two legs, can be rapidly by contour three strong point furnishings of platform, to keep the level of platform.The output of the detection of platform inclination and signal is completed by the double-shaft tilt angle sensor that is fixed on flat surface, and output signal while setting the accurate level of platform is zero.

The flexible principle of two legs is: leg is processed with respectively left-handed and connecting rod dextrorotation internal thread by the cast element of the contrary screw rod of upper and lower two rotation directions and a middle hollow and two ends and forms, in the time that the internal and external threads of upper and lower screw rod and intermediate connecting rod screws, rotate intermediate connecting rod, will make the screw rod at two ends produce axial straight line motion (as the not transfer of screw rod of table leg) in opposite directions, supporting leg is elongated or shortened.Adopt two screw rods that rotation direction is contrary, can realize supporting leg bi-directional expansion, improve the speed of its length change, also improved the speed of system responses.The rotation of intermediate connecting rod, by stepper motor (or actuating motor), by worm-and-wheel gear transmission, its worm gear and connecting rod periphery fix.Worm-and-wheel gear both can make decelerating through motor, also can make connecting rod obtain enough moments of torsion.In the time of platform inclination, the magnitude of voltage of dip sensor sampling changes, through controlling, after amplification circuit conversion, respectively by Single-chip Controlling separately the stepper motor on supporting leg rotate, make rapidly platform restore balance.

Between two telescopic supporting legs, in succession one with the connecting rod of empty set, on it, fix the stepper motor of two legs, can make like this motor in the time driving worm gear rotation, transfer phenomenon does not occur.

The beneficial effects of the utility model are: as long as change the length of two legs, just can make platform remain level, simple in structure, convenient being suitable for has good application prospect in our daily life, industrial production and Geng Gao field.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model

Fig. 2 is situation plan of the present utility model

In figure: 1. platform, 2. double-shaft tilt angle sensor, the screw rod on 3.B leg, the double rotational directions internal thread bar on 4.B leg, 5. worm gear, 6. worm screw, 7.B, C leg connecting rod, 8, A leg, 9.C leg.

Fig. 3 is closed loop controlling structure schematic diagram of the present utility model

Embodiment

As shown in Figure 1, 2, flat surface 1(supposition plane of the present utility model is for circular) there are three supporting leg A, B, C that become equilateral triangle layout below, the length of A leg is fixed, and the length of B, C two legs is scalable.The double-shaft tilt angle sensor of the small volume low-cost and high-precision that system is selected is installed to the mid point of the D(AB at the platform back side) put this special position, the direction of X, Y is as shown in Figure 2.In figure, find out, sensor Y-axis is on AB line, and what its reflected is the inclined degree of AB line.X-axis is on CD line, and its reflection C point is with respect to the inclined degree of AB line.

Under initial state, flat surface 1 is horizontal, and A, B, C tri-legs are contour, and the control inputs signal of system is zero.If there is the situation that B point reduces, platform deflection, now, the magnitude of voltage of the sampling in dip sensor Y direction changes, controller receives the signal of dip sensor and is recognized, by Single-chip Controlling stepper motor forward (or oppositely) rotation, suppose that motor is rotated in the forward drive B leg and extends, also be worm screw 6 be rotated in the forward drive worm gear 5 rotate, the internal thread of the connecting rod 4 fixing with it becomes rotation driving link, and it outwards moves the two ends screw rod that makes to rotate, and supporting leg extends, B point raises, and then platform is adjusted to level.In this process, because reducing, B point also cause D point to reduce, thus the run-off the straight of DC line, identical principle, the stepper motor on C leg starts, and drives the turbine and worm motion on C leg, make C point occur first to fall, and the chain response that raises of the rising of order with B, final platform recovery level.If AB keeps level, C point reduces, now, be equivalent to CD and turned an angle around AB axle, sample voltage value in dip sensor X-axis direction changes, controller receives the signal of dip sensor and is recognized, be rotated in the forward by the stepper motor on Single-chip Controlling C leg, thereby drive C leg to extend, platform recovers level thereupon; Otherwise if C point raises, the stepper motor reversion on its leg, shortens leg, until platform recovers level.Generally, directions X and Y-direction all can have inclination angle, and system will be according to the inclination angle size of both direction, automatically adjust the length of B, C two legs, make platform maintain level.

In Fig. 3, represented control mode is based upon on closed loop transfer function basis.From figure, can find out, plateform system is one and under self oblique position SC sigmal control, " certainly controls " system, and that is to say, the control inputs signal of system is zero, and control signal is provided by feedback signal completely.Under Single-chip Controlling, keeping the inclination angle of X and Y-direction is zero.

The advantages such as can be found out by upper description, the platform of automatic maintenance level of the present utility model has simple in structure, and convenience is applicable, it can, waving in the environment jolting, obtain a levelling bench not changing with ground.

Below describe by reference to the accompanying drawings mode of execution of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the concrete structure shown in Fig. 1, Fig. 2, these simple variant all belong to protection domain of the present utility model.

It should be noted that each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.

In addition, also can carry out combination in any between various mode of execution of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.

Claims

1. the platform of an automatic maintenance level, it is characterized in that: platform is supported by three supporting legs arranging by equilateral triangle, is called A, B and C leg, and wherein A leg length is fixed, B, C two leg lengths can be realized flexible under driven by motor, to keep the level of platform.

2. the platform of a kind of automatic maintenance level according to claim 1, it is characterized in that: a double-shaft tilt angle sensor is installed on the back side of platform, as the detection of platform levelness and the element of transmitted signal, sensing station is placed on the mid point of A, B line, and Y direction is along AB direction, and X-axis direction is just in time pointed to C point.

3. the platform of a kind of automatic maintenance level according to claim 1, it is characterized in that: B, C leg are processed with respectively connecting rod left-handed and dextrorotation internal thread by the cast element of the contrary screw rod of upper and lower two rotation directions and a hollow and two ends and form, this cast connecting rod outside is connecting firmly worm gear, adjusting leg length is to drive worm screw by stepper motor (or actuating motor), drive worm gear and cast connecting rod to rotate, thereby the screw rod that makes two ends produces axial straight line motion in opposite directions, supporting leg is elongated or shortened, keep the level of platform.