Vacuum negative pressure intelligent blackboard eraser and control method thereof

Abstract

The invention provides a negative pressure type intelligent blackboard eraser. The negative pressure type intelligent blackboard eraser comprises a blackboard eraser main body, an adsorption device, acontrol module, a communicating module, a recognition module, a driving module and a cleaning module. The recognition module, the driving module and the cleaning module communicate with the control module by means of the communicating module, the adsorption device comprises a base arranged at the bottom of the blackboard eraser main body, a draught fan, a motor and a vacuum cavity, the motor drives the draught fan to rotate rapidly to empty interior air of the vacuum cavity within a short time to form pressure differences, so that absorption capacity is generated to absorb the blackboard eraser main body. The cleaning module comprises an erasing device, the erasing device comprises a fur brush and a driving motor, the driving motor is provided with a frequency converter, a first frequencyand a second frequency are arranged in the frequency converter, the first frequency or the second frequency is selected to drive the fur brush to work by the frequency converter according to a control signal of the control module, and the adsorption device adsorbs dust by using an electrostatic principle or absorbs the erased dust to a dust collector by using motor suction.

Description

technical field [0001] The invention relates to the field of intelligent blackboard eraser, in particular to a vacuum negative pressure type intelligent blackboard eraser and a control method thereof. Background technique [0002] Most of the existing intelligent blackboard erasers at home and abroad use two motors as power to control the up and down motion of the motor-driven blackboard eraser and the left and right movement of the track. In terms of the blackboard adsorption function, the electromagnetic suction device is used. In the erasing state, the armature is connected to the coil through the circuit connection, so that the blackboard eraser is in close contact with the blackboard, so that when the blackboard eraser moves up and down, it performs the task of wiping the blackboard. On the one hand, for this type of smart blackboard eraser that is driven along the track and must be used with the blackboard or installed on the blackboard with a track device that matches...

AI Technical Summary

Problems solved by technology

On the one hand, for this type of smart blackboard eraser that is driven along the track and must be used with the blackboard or installed on the blackboard with a track device that matches the blackboard eraser, the product cost is greatly increased, and there are higher requirements for the blackboard. In terms of function, all areas of the blackboard can only be wiped uniformly, and the area with handwriting cannot be wiped in a designated manner, which is a waste of time and low in efficiency. On the other hand, it is adsorbed on the blackboard by the principle of electromagnetic attraction. It will cause a certain degree of damage to the blackboard, and the application value will be greatly reduced

[0003] The starting device with two electrodes will also generate a large noise source. For a quiet learning environment, another important processing point of the blackboard eraser is the elimination of noise.

However, the existing blackboard eraser is not very ideal in terms of noise source treatment. Our team focuses on the design of the noise source treatment. The multi-layer noise reduction device guarantees a quiet learning environment. For now, only a few parts can truly Dust-free and silent, and can achieve a certain efficiency in man-machine exchange, but time-consuming and labor-intensive, the use value of this type of blackboard eraser products is reduced in comparison, it can be said that the current smart blackboard eraser The state of development is at a standstill without major innovation breakthroughs

[0004] The design structure of another intelligent blackboard eraser is improved into a motor in the control system. It is divided into two types in terms of mechanism design. One type is directly pressed by bolts. This type of design has poor flexibility. If the pressure is too tight, it will The brush body is severely worn, and if it is too loose, it will not be wiped clean. The other type is spring compression design. By adjusting the compression degree of the spring, the force of the brush body acting on the blackboard can be changed. Although it is reduced, the brush body will not be damaged. Too much force leads to serious wear and prolongs the service life, but each blackboard has different degrees of wear after a long period of use. Before using the product, it is necessary to determine the elastic force of the spring according to the degree of wear of the blackboard. The operation is complicated and difficult to operate

[0005] There is also a driving design of an intelligent blackboard eraser that uses a stepping motor, and the stepping motor can be controlled by a single-chip microcomputer to achieve pulse distribution. According to a given power-on and commutation sequence, the software method is the control pulse sent by the single-chip microcomputer I / O port drive circuit. , the single-chip microcomputer only controls the stepping motor, there is no other work requirement, but in terms of speed control (speed regulation) is realized by the stepping pulse frequency sent by the single-chip microcomputer, for the software control pulse distribution method, it can be delayed by software method to achieve, change the length of the delay to change the frequency of the output pulse, but this method takes up a long CPU time, takes up a lot of computer time, and has no use value

[0006] Nowadays, with the development of the times, some new teaching blackboards such as whiteboards have appeared, but for students who are far away from the blackboard in the back row of the classroom, the white background board will make it difficult for students to see the writing on the blackboard, so the traditional blackboard is practical. It is larger than the whiteboard, and it can be seen that although the whiteboard has replaced the blackboard in some teaching, the traditional blackboard still cannot be completely replaced in the past, and the traditional blackboard is still widely used today.

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