Industrial Vehicle Control Device for Collision Prevention
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Solution Overview
Problem
Industrial vehicles face issues where the working device's rotation speed is not consistently fixed, leading to potential contact with the vehicle body when rotated towards the approaching side.
Innovation Solution
An industrial vehicle with a control device that restricts the working device's rotation towards the approaching side by setting an offset position based on angle speed, temperature of pressure oil, and engine rotation speed, using a hydraulic circuit powered by an engine to stop the rotation and adjust the restriction range accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the working device is rotated toward the approaching side without restriction, then the operation flexibility is improved, but the attachment may contact the vehicle body causing safety issues
Solution Approach 1:
The control device applies preliminary anti-action by detecting the rotation state of the working device and actively restricting rotation toward the approaching side when the attachment approaches the vehicle body. The control device receives rotation state information, determines whether rotation should be restricted, and outputs restriction commands to prevent harmful contact before it occurs.
Solution Approach 2:
The system implements feedback control by continuously monitoring the rotation state of the working device through rotation state information, comparing it against safety criteria, and adjusting the rotation restriction accordingly. The control device modifies its restriction behavior based on real-time feedback about the attachment's position and movement state.
2Device complexity
If the rotation restriction is applied at a fixed position, then the control simplicity is improved, but the working device may still rotate from the restriction position due to high rotation speed
Solution Approach 1:
The control device applies dynamics by making the rotation restriction position variable rather than fixed. It calculates a dynamic restriction position based on the detected rotation state, including rotation speed considerations. This allows the restriction position to adapt to different operating conditions, preventing the working device from rotating past the restriction point even at high speeds.
Solution Approach 2:
The system changes the parameter of restriction position from a constant value to a variable that depends on rotation state parameters. The control device calculates the restriction position using rotation state information, effectively changing the spatial parameter of where restriction is applied based on current operational conditions.
3Loss of time
If the offset position is set far from the restriction position, then the stopping operation has more time to activate, but the working device rotates further towards the approaching side before stopping
Solution Approach 1:
The offset position is made dynamic rather than fixed, calculated based on rotation state information including rotation speed. When rotation speed is high, the offset position is adjusted to provide adequate stopping distance while minimizing excessive rotation. This dynamic adjustment optimizes the balance between response time and rotation control.
Solution Approach 2:
The offset distance parameter is changed from a constant value to a variable that responds to rotation state conditions. The control device adjusts the offset position parameter based on detected rotation characteristics, ensuring optimal stopping behavior under different operational conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively prevents the working device from rotating towards the approaching side, ensuring safe operation by maintaining precise control over the rotation based on real-time parameters.
Implementation Method 1
a hydraulic circuit which has a hydraulic pump driven with the engine as a power source, rotating the working device by supplying pressure oil from the hydraulic pump to the working device
Data Source
Figure 1
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AI summary
The present invention addresses the problem of providing an industrial vehicle in which an industrial device can be reliably prevented from turning in a near direction beyond a restricted position. The solution is an industrial vehicle (1) provided with an industrial device (4) configured so as to be capable of turning about a joint in a near direction or an away direction, and a control device (30) for restricting the turning of the industrial device (4) so that the industrial device (4) does not turn in the near direction beyond a restricted position (A), wherein the control device (30) is configured such that an offset position (B) is set in the away direction beyond the restricted position (A), and the control device (30) initiates an action that stops the industrial device (4) from turning in the near direction when the industrial device (4), which is turning in the near direction, has turned to the offset position (B).