What safety measures are in place for mobile shelving units in Zhengzhou?

1. A pair of infrared sensors are installed at the middle section of each entrance on both sides of the shelving unit, and a reflector is installed on the opposite side of the unit, forming an active human detection and protection light grid. This active infrared sensor has two protection functions: first, if someone suddenly enters the unit while it is in operation, the infrared sensors immediately detect it and the system automatically stops; second, when the mobile shelving unit is opened, the infrared sensors automatically count and register the number of people entering that section. If not all those who have entered have exited, the system will display a message indicating that someone is present and prohibit any form of shelving unit movement. This effectively protects people's safety.

2. This active infrared system also enables automatic control of the lighting in the column area. When the number of people entering is not zero, the system will automatically turn on the lighting in the column area, and when the number of people entering is zero, the system will automatically turn off the lighting in the column area.

II. Automatic counting and display of the number of people entering, with warning and protection functions.

1. After the Zhengzhou mobile shelving unit is moved into position and someone enters the column area, it will automatically enter a no-movement protection state. Simultaneously, the digital display on the unit will show the number of people who have entered, and the lights will turn on. To continue moving, you must press the "Stop" button on the panel.

The "Stop/Clear" button will unlock the device. When the mobile shelving unit is in a prohibited movement state, all commands to operate the unit will be invalid.

2. Automatic shutdown function after unattended operation timeout (this function can be turned off or on by the group's main switchboard):

1) If this function is enabled, when staff forget to close the shelves, a voice alarm will sound, the lights will turn off automatically, the shelves will close automatically, and the mobile shelving unit will be locked within a certain period of time.

2) Managed by computer program software, when staff forget to close the shelves, an audio alarm will sound, the lights will turn off automatically, the shelves will close automatically, and the mobile shelving will be locked within a certain period of time.

III. Functions of the bar pressure sensor in Zhengzhou mobile shelving units:

1. A bar pressure sensor must be installed at the lower end of the frame. When a person or object touches the bar pressure sensor, the frame will automatically stop and lock.

2. The bar pressure sensor can function at any location when the pressure is ≥200g.

3. The electric mobile shelving unit shall be stopped immediately in the following situations;

1) The safety system was activated;

2) Press any of the following buttons on the sub-machine during operation;

3) A foreign object has entered the moving passageway;

4) Books fell and bookshelves touched items on the passageway floor during movement;

5) Any safety device malfunctions;

6) It encounters reverse resistance during operation;

4. In the event of any abnormal situation, the fault light will illuminate or an audible alarm will sound.

5. When the safety system is activated, any moving bookshelf will come to a complete stop within a sliding distance of ≤60mm.

IV. Power supply using a 24V low-voltage DC system.

1. The entire control system uses 24V low-voltage DC. Each group area has a power supply box that directly converts the 220V AC mains power into 24V DC output. A fuse and a dedicated leakage current switch are installed when the 220V input is used to ensure personnel safety.

2. Because it uses 24V DC voltage, the wiring inside the entire metal frame is very safe, eliminating the risk of electric shock to the human body due to leakage from some high-voltage lines.

V. Automatic power-off function of Zhengzhou mobile shelving

1. The 24V output circuit is also equipped with a dedicated fuse. In the event of a short circuit or overcurrent, the fuse will blow immediately, cutting off the circuit and ensuring safe power supply for the entire system.

2. The bookshelf will stop immediately if the motor is overloaded.

VI. Fireproof and thermal insulation functions

1. All motors are powered on and activated within a 25-second timer, eliminating safety hazards caused by motor overheating and ensuring that the motor temperature does not exceed the warehouse temperature by 5°C.

2. All column drive motors are housed inside a chassis, which is equipped with fireproof and flame-retardant materials.

3. At the contact point between the frame chassis and the motor, there are two layers of hollow steel plates, which are sprayed with flame-retardant powder to ensure directional heat conduction from the motor and prevent heat transfer to the shelves.

VII. Monitoring Functions of Zhengzhou Mobile Shelving

Each rack has an independent safety protection circuit system that monitors the normal operation of the safety system. If any safety protection component malfunctions, the system will automatically lock and issue a warning, then wait for maintenance.