Wireless 3D Sensor Head for Cable-Free Spatial Coordinate Recording
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Solution Overview
Problem
Conventional 3D sensors with cable connections for current supply and data transmission are restricted in movement, limiting their flexibility and ability to perform unrestricted measurements around objects.
Innovation Solution
A portable, hand-held device with a projector and camera system, powered by an electrochemical energy store, that uses wireless data exchange and a cable connection for control and image data transmission, allowing flexible and cable-free operation for non-contact recording of spatial coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cable connection is used for current supply and data transmission, then reliable power and data connection is achieved, but freedom of movement is restricted
Solution Approach 1:
The patent extracts the cable connection from the system by implementing wireless communication between the sensor head and control unit. The sensor head becomes cable-free and portable, while the control unit handles all power and data transmission wirelessly, eliminating the physical cable constraint that limited freedom of movement.
Solution Approach 2:
The patent replaces the mechanical cable connection system with a wireless communication system. Instead of physical cables transmitting power and data, the system uses electromagnetic waves (radio frequency communication) to achieve the same functions, thereby eliminating the mechanical constraint on movement.
2Measurement precision
If conventional stripe projection method is used, then 3D measurement capability is achieved, but measurement speed and density are insufficient
Solution Approach 1:
The patent implements continuous stripe pattern projection and continuous image capture, eliminating the need for discrete, separate measurement steps. The sensor head continuously projects stripe patterns and captures images while moving, enabling rapid acquisition of dense 3D point clouds without interruption or significant delays between measurement steps.
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
Enables rapid and flexible measurement of dense 3D point clouds from various angles without the hindrance of cables, facilitating all-round measurements and reducing data transmission requirements, thus enhancing the freedom of movement during data recording.
Implementation Method 1
a projector (1) with an imaging element and a projection lens for projecting a variable pattern, which can be generated on the imaging element, towards the surface
Implementation Method 2
at least one camera (2, 3) for observing the surface
Implementation Method 3
an electrochemical energy store for an energy supply of the sensor head and of the control unit being accommodated furthermore in the control unit or in the sensor head
Implementation Method 4
an imaging element, and a projection lens for projecting a variable pattern, which can be generated on the imaging element
Data Source
AI summary
A device and a method for non-contact recording of spatial coordinates of a surface includes a sensor head and a controller connected to the sensor head. The sensor head is designed as a portable hand-held device, a projector and two cameras. The controller is also designed as a portable device, with an electrochemical energy source housed in the controller or in the sensor head for power supply to the sensor head and the controller and no cable connection of the sensor head or the controller is provided to further stationary components of the device.