Types of laser sweeper

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2022-03-08

Currently commonly used in ChinaLaser SweeperAccording to the working principle, whether to add a compensation mechanism, whether to use a compensation mechanism, can be roughly divided into three categories: bubble laser sweeper, automatic leveling laser sweeper, and electronic automatic leveling sweeper.

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bubble laser sweeper

The SJ2 and SJ3 laser sweeper produced by Beijing Optical Instrument Factory in 1996 are products with simple structure and relatively low cost.

low bubbleLaser SweeperIt is a popular tool suitable for building construction, interior decoration and other construction work. The laser light emitted by the laser diode passes through the objective lens to obtain a laser beam. After passing through the pentagonal prism, the laser beam is divided into two beams. One beam goes straight through, the other changes direction 90 degrees. The rotating head of the instrument is driven by a motor through a belt to form a scanning laser plane. The instrument is equipped with a long level of Anping instrument. (Like the bubble sweeper, the level is based on the level, which means that the horizontal error of the laser plane depends on the accuracy of the level. If the instrument is placed horizontally, the vertical plane of the laser scan can be obtained according to the vertical level. The accuracy of this instrument is largely affected by human factors.

Due to the fast and convenient requirements of engineering construction and the high precision requirements of some special occasions, it is difficult to meet the requirements of bubble level. Therefore, various automaticLaser Sweepercame into being, and produced some unique leveling methods.

Automatic Anping Laser Sweeper

The SJZ1 automatic leveling instrument developed by Beijing Optical Instrument Factory uses a suspension spring opto-machine compensator to achieve the purpose of automatic leveling. No matter how the instrument is tilted, the scanned laser plane will always be on the horizontal plane within the compensation range. The laser leveling instrument is suitable for the construction site with large vibration.

Electronic AnpingLaser Sweeper

Optomechanical compensators have the advantages of relatively simple structure, low cost and certain vibration resistance. However, since the compensation accuracy decreases with the increase of the compensation range, the compensation range is generally limited to ten minutes. With the modern development of the principle of electronic automatic leveling, the leveling range can be extended to the left and right, with high stability and compensation accuracy.

The electronic leveling system generally consists of sensors, electronic circuits and actuators. The bubble sensor is based on an element similar to a general bubble level, in which a glass bubble is filled with a conductive liquid. The glass tube is coated with a metal cover and forms two symmetrical electrodes. There are two resistances corresponding between the two electrodes. When the bubble is centered, the resistance is equal. When the bubble is tilted, the bubble is displaced, which destroys the equilibrium state of the two resistors, so that the bridge composed of the sensor circuit loses balance and produces the corresponding voltage output. The output signal is amplified by electronic processing and then drives the actuator to make the servo motor produce the corresponding forward or reverse rotation, and maintain the balance of the bridge, which achieves the purpose of electronic automatic leveling.


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