Millimeter-Wave Body Scanning With Pre-Entry Posture Guidance
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Solution Overview
Problem
Existing millimeter-wave security inspection systems require individuals to maintain a stationary posture for an extended period, leading to low passing efficiency due to the need for posture adjustment and prolonged scanning times.
Innovation Solution
A system and method that includes displaying designated posture instructions before entry, guiding individuals to assume the correct posture within the inspection channel, and using millimeter-wave scanning to reconstruct images for posture confirmation and item recognition, with optional visible light image comparison and audio guidance to expedite the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the person to be inspected is required to stand in a designated posture for a certain period of time in front of the security inspection instrument, then a high recognition rate can be ensured, but the person to be inspected is required to continuously adjust his/her standing posture and stays within an inspection channel for a long time, thereby limiting the passing rate
Solution Approach 1:
The system displays posture guidance information to the person to be inspected before they enter the inspection channel, allowing them to adjust their posture in advance. This preliminary action reduces the time needed for posture adjustment during scanning, thereby improving passing rate while maintaining recognition accuracy.
Solution Approach 2:
The system provides real-time feedback through posture guidance information displayed on a screen, showing the person to be inspected how to position themselves correctly. This feedback mechanism enables quick posture correction without requiring multiple scanning attempts, resolving the contradiction between recognition rate and passing rate.
2Manufacturing precision
If the person to be inspected is required to continuously adjust standing posture and stay within inspection channel for a long time, then scanning accuracy is improved, but the residence time in inspection channel increases, thereby limiting the passing rate
Solution Approach 1:
Posture guidance information is provided before the person enters the inspection channel, enabling them to adopt the correct posture in advance. This eliminates the need for continuous posture adjustment during scanning, reducing residence time while maintaining scanning accuracy.
Solution Approach 2:
The system replaces the mechanical process of continuous posture adjustment with an information-based guidance system. The posture guidance information provides visual feedback that enables one-time correct positioning, substituting iterative mechanical adjustment with a single informed action.
3Productivity
If millimeter-wave scanning is performed on persons in motion, then passing efficiency is improved, but the recognition rate may be compromised due to motion blur or incomplete scanning data
Solution Approach 1:
The system provides posture guidance information before the person enters the inspection channel, enabling them to adopt and maintain the correct posture during scanning. This preliminary preparation allows for faster scanning at higher speeds without compromising recognition accuracy, as the person is already properly positioned.
Solution Approach 2:
The system transitions from a static scanning approach (requiring persons to remain stationary for extended periods) to a dynamic approach where persons can move through the channel more quickly. The posture guidance information ensures that even during motion, the scanning captures adequate data for accurate recognition.
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
This approach reduces posture adjustment time and enhances passing efficiency by allowing individuals to prepare for the correct posture beforehand, minimizing residence time in the inspection channel and improving overall system throughput.
Implementation Method 1
A millimeter-wave detection and imaging technology has many advantages, such as no harm to a human body in use due to non-ionizing radiation, penetrating human clothing, and recognizing various metal and non-metal prohibited items.
Implementation Method 2
penetrating human clothing
Data Source
AI summary
A method and a system of performing security inspection of human body based on millimeter-wave. The method includes: displaying, by a first display device, information related to a designated posture to a person to be inspected before the person enters an inspection channel defined by a millimeter-wave human body security inspection instrument, the designated posture being expected to be taken by the person when scanning the person with the instrument; guiding the person to enter the inspection channel and stand at a designated standing position within the inspection channel in a standing posture substantially complying with the designated posture; scanning, by the instrument, the person, to obtain millimeter-wave scanning data; and performing, by a workstation, a reconstruction of millimeter-wave scanning image of the person, a confirmation for the standing posture of the person, and a recognition of a suspected item of the person, based on the millimeter-wave scanning data.