Monitoring System Attitude Calibration Without External Sensors
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Solution Overview
Problem
Existing monitoring systems using invisible light, such as infrared, face challenges in confirming the correct installation attitude without external sensors, leading to increased costs and inefficiency, especially for stationary devices, as they require complex calculations and external sensors like gyro sensors and GPS for determining the device's attitude during installation.
Innovation Solution
A monitoring system that includes a light projecting and receiving unit, a processing section for measuring distances, a display device for displaying measurement point markers, and a user interface for inputting temporary attitude information, allowing for coordinate conversion and adjustment of the measurement point markers without external sensors, enabling intuitive grasping of the monitoring space and device attitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external sensors (gyro sensor, GPS) are attached to the monitoring device to acquire installing attitude, then the installation attitude can be accurately determined, but the cost increases and the device complexity increases
Solution Approach 1:
The patent extracts the attitude determination function from external sensors and implements it within the monitoring device itself using the laser radar's scanning mechanism. The system uses the relationship between the scanned three-dimensional space and the known monitoring space to calculate installation attitude, eliminating the need for separate gyro sensors and GPS devices.
Solution Approach 2:
The laser radar is made to serve multiple functions: not only does it perform distance measurement and object detection, but it also determines the installation attitude of the device. By utilizing the scanning pattern and three-dimensional space data already collected for monitoring purposes, the system simultaneously acquires attitude information without requiring additional dedicated components.
2Loss of information
If external sensors are attached to determine installing attitude, then accurate attitude information can be obtained, but the system becomes more complex and costly
Solution Approach 1:
The patent merges the attitude determination function with the existing distance measurement and object detection functions. The control unit processes the three-dimensional coordinates obtained by the laser radar to calculate both the monitoring space configuration and the installation attitude simultaneously, consolidating multiple functions into a single integrated system.
3Stability of the object's composition
If the monitoring device is stationary and installed fixedly, then the installing attitude is fixed, but using external sensors is not cost effective as they are used only at installation time
Solution Approach 1:
The monitoring device performs self-calibration and self-determination of its installation attitude using its own laser radar scanning capability. The device autonomously calculates its own installation parameters by comparing the scanned three-dimensional space with the expected monitoring space, eliminating the need for external sensors that would only be useful during the brief installation period.
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 solution allows for the simple determination of the monitoring device's attitude without external sensors, reducing costs and enabling intuitive adjustment of the installation position and attitude, effectively setting up the monitoring system to detect intruders.
Implementation Method 1
measures a distance to an object in a monitoring space on a basis of the time from the transmitting to the receiving of reflected light
Implementation Method 2
transmits laser light toward a monitoring space and measures a distance to an object in a monitoring space
Data Source
AI summary
A setting method of a monitoring system including a light projecting and receiving unit having an emitting section and a scanning section to make light flux scan within a monitoring space, a processing section to measure a distance to an object by processing signals from the light projecting and receiving unit and to output a measurement point marker group provided with three-dimensional distance information for each measurement point, a display device, and a user interface to perform input of temporary attitude information, includes: inputting the temporary attitude information via the user interface to adjust an attitude or position of the measurement point marker group displayed on the display device; performing coordinate conversion for at least the measurement point marker group on a basis of the temporary attitude information having been input; and displaying the measurement point marker group after having been subjected to the coordinate conversion on the display device.