With the increasing level of automation in the logistics field, various information technologies such as optoelectronic technology, computer technology, and control technology have been widely applied. Among them, laser detection technology, with its advantages in ranging, positioning, and other aspects, has played a key role in equipment such as tunnel stackers and automatic navigation equipment, and actively promoted the improvement of the overall performance of the logistics system.

Laser ranging and positioning
The application of laser ranging and positioning technology in the automatic control system of track tunnel stacker has achieved absolute address recognition of the stacker, effectively solving the accuracy and reliability of counting and positioning, and conveniently achieving smooth speed regulation, thereby improving the overall performance of the stacker. Figure 1 shows an automated three-dimensional warehouse for a roadway, typically consisting of multiple alleys. The tunnel track stacker is the core equipment and main handling equipment of automated three-dimensional warehouses. Its main purpose is to shuttle back and forth in the tunnels of high-rise three-dimensional shelves, automatically store and retrieve goods located at the entrance of the lane, and place them in the designated storage space for storage operations, or transport goods from the storage space to the entrance of the lane for storage operations, or transfer goods from one storage space to another storage space for inventory transfer operations, Widely used in supply chain logistics, precise warehousing, and fast delivery.
 

Implementation of laser ranging and positioning
By processing the above data through a PLC program, the identification and positioning of the stacker crane can be achieved. Due to the realization of absolute address recognition and digitization of cargo location settings through laser ranging, it is convenient to set up cargo location data, inbound and outbound platform positions, operating speed values, etc. It is easy to achieve functions such as data comparison, counting, automatic speed change, and precise positioning.

The application of technologies such as laser ranging and positioning, PLC control, and vector variable frequency speed regulation in the automatic control system of the track tunnel stacker crane has surpassed the original design concept and achieved absolute address recognition of the stacker crane. This not only effectively solves the accuracy and reliability issues of counting and positioning, but also facilitates smooth speed regulation, optimizes the speed regulation curve, and optimizes the starting and braking performance, This improves the overall performance of the stacker crane, ensuring its reliability, stability, and efficiency.

SFL Series long distance laser ranging sensor 
G-TEK SFL series laser ranging sensors are powerful distance measuring instruments that can be integrated into various industrial applications. Through the reflection of a laser beam, precise, non-contact long-distance ranging is possible.
 Product Feature
●Measurement principle of phase method to ensure the millimeter level measurement accuracy
●Visible red laser, easy to align and debug
●Measurement range: 0.2m-100m
●Measurement accuracy±2mm，Repetition accuracy±0.5mm（1δ）
●High measuring speed above 300Hz
●Profinet and other communication interface outputs
●Switch output
●Wide range power supply voltage（12-30VDC）
●6 LEDs for status signals
●4 buttons for setting parameters
●LCD display, clear and intuitive
●M12 Electrical interface
●IP65 Protection rating
●Excellent anti light interference ability
●Wide operating temperature range（-20℃~55℃）
●Strong anti-electromagnetic interference capability

At present, laser positioning technology has been widely applied in fields such as machinery, food, tobacco, electronics, automobiles, lifting and distribution centers, pharmaceuticals, electrical appliances, and warehousing. We welcome more attention to G-TEK SENSOR laser ranging products.