CN114321629A - A base for automatic leveling of measuring and moving platforms through motors - Google Patents

Abstract

The invention provides a base that can be used for automatic leveling of a measuring and moving platform through a motor, which comprises (1) a bottom supporting platform, (2) a leveling platform, (3) an angle sensor, (4) a motor, (5) Threaded drive self-locking device, (6) tapered roller bearings. The base can detect the angular offset of the current plane and compensate it by the motor. It can dynamically detect the current plane offset and adjust it in real time, and is controlled by the motor, which is convenient and quick, and can ensure accuracy. It is suitable for measuring instruments such as theodolites, levels and total stations that can only be used on the premise of level, as well as desktop instruments or mobile test platforms that require real-time level adjustment, which can significantly reduce errors caused by manual adjustment and improve the efficiency of level adjustment. .

Description

A base for automatic leveling of measuring and moving platforms through motors

technical field

The present invention is a base that is automatically leveled by a motor. It can be used for measuring instruments such as theodolites, levels, and total stations that must be leveled, as well as desktop instruments or mobile test platforms that need to be leveled in real time. This kind of scene that needs to be adjusted is very common, so a fast, accurate, dynamic adjustment, and self-locking base for adjusting the level is very necessary.

Background technique

There are two types of leveling methods currently used, one is the three-foot screw to adjust the level, and the other is to gradually adjust to the level by adding a spacer to the bottom of the instrument.

The first method of leveling is very common on instruments such as level, theodolite, and total station that require leveling. This method needs to go through two steps to adjust the level: one is rough adjustment first, and the instrument for level adjustment is placed on a relatively horizontal plane as much as possible, so that the circular bubble level on the instrument can be initially positioned in the middle; the second is fine adjustment, continuous The slight adjustment of the three foot screws makes it possible to finally locate the bubble of the column level in the middle. The human factor of this method is very large, and the adjustment level requires long-term operating experience, and the adjustment efficiency of inexperienced people is very low; and whether to adjust the level is also determined by human eyes, and the accuracy cannot be guaranteed.

The second is generally used for desktop instruments or test platforms. The adjustment method of the level relies on adding spacers at the bottom of the four feet, and gradually try to test the final level. The adjustment efficiency of this method is extremely low, and it relies on human experience and feeling to gradually add shims to the level; the adjustment accuracy cannot be guaranteed; if the instrument or platform is moved, it will take a lot of manpower and material resources to level.

In view of the above reasons, in order to deal with the practical difficulty that the instruments and equipment cannot be adjusted to the horizontal position efficiently and accurately, a base that can be automatically adjusted to the level by a motor is proposed.

Description of drawings:

Figure 1: The overall structure of the automatic leveling base;

Figure 2: Calculation description of leveling steps;

Figure 3: The working principle of the thread transmission self-locking mechanism.

SUMMARY OF THE INVENTION

The invention provides a base that can be automatically leveled by a motor, which can be quickly, efficiently, accurately, dynamically adjusted and self-locked. It mainly measures the angular offset of the current position through the angle sensor, and then calculates the compensation value, compensated by the two motors located in the X-axis and Y-axis directions, and finally adjusted to the level.

This patent consists of (1) a bottom support platform, (2) a horizontal adjustment platform, (3) an angle sensor, (4) a motor, (5) a threaded transmission self-locking device, and (6) a tapered roller bearing. Among them, there are two sets of (4) motor and (5) thread transmission self-locking device, which control the angle θθ offset of X-axis and Y-axis respectively.

[Note: This schematic diagram only shows the X-axis direction, the Y-axis direction is exactly the same as the X-axis direction and the adjustment method] (2) The middle part of the horizontal adjustment platform is a universal shaft, which can be freely rotated along the X-axis and Y-axis directions . (3) The angle sensor is installed on (2) the leveling platform. (4) The motor is mounted on the (1) bottom support platform. (5) The upper end of the threaded transmission self-locking device is installed on (2) the leveling platform. (6) The tapered roller bearing is installed on the (1) bottom support platform, and is sleeved on the (5) threaded transmission self-locking mechanism. The bearing needs to ensure that (5) the shaft of the threaded transmission self-locking mechanism can rotate freely.

(As shown in Figure 1)

specific plan

The steps to adjust the level are as follows:

Build an automatic leveling base.

1. Place the automatic leveling base on a tripod or platform.

2. The angle sensor measures the angle offset between the X axis and the Y axis of the current plane. [Note: This leveling step only displays the X-axis adjustment steps, and the Y-axis adjustment steps are exactly the same as the X-axis adjustment steps. 】

3. Find the number of turns the motor needs to rotate to compensate for the X-axis angle offset. The distance L from the center of the bottom support platform to the center of the threaded transmission mechanism, the thread pitch P, the transmission ratio I, and the X-axis angle offset θ measured by the angle sensor are known. Finally, the number of revolutions T of the motor can be obtained (as shown in Figure 2), and the formula is as follows.

4. The motor rotates to adjust the level. The rotation of the motor drives the bevel gear 1, the bevel gear 1 drives the bevel gear 2, the shaft 3 is fixedly connected to the bevel gear 2 and rotates together, the threaded end of the upper end of the shaft 3 is connected with the inner thread of the sleeve 4, and the shaft 3 rotates forwardly at this time. Or reversing will increase or decrease the distance from the sleeve 4, so the change in this distance can compensate for the angular offset of the X and Y axes. At the same time, the motor only bears torque, not thrust, and because it is a threaded connection, it has the characteristics of self-locking and will not change the level due to weight or vibration (as shown in Figure 3).

Claims (6)

1. The present invention is a base for automatically leveling the measuring and moving platform through a motor. The invention measures the angular offset through an angle sensor, and compensates for the offset by means of the motor, and finally reaches the level. 2. This patent consists of a bottom support platform, a horizontal adjustment platform, an angle sensor, a motor, a threaded drive self-locking device, and a tapered roller bearing. 3. The leveling step according to claim 1, wherein the center of the leveling platform is a universal shaft, which can freely rotate along the X-axis and the Y-axis. 4. The level adjustment step according to claim 1, wherein the angle sensor is a dual-axis sensor, which can measure the angle offset of the X-axis and the Y-axis. 5. The level adjustment step according to claim 1, the screw drive self-locking device can place the motor laterally, and can only bear torque, and because it is a screw drive, it has self-locking characteristics. 6. The level adjustment step according to claim 1, the number of turns needed to be rotated by the motor to compensate can be calculated by a formula.

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