Ultrasonic Detection Device Interference Source Elimination
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Solution Overview
Problem
Ultrasonic detection devices often experience detection errors due to external interference sources, such as sirens or horns, which cause clutter waves that are indistinguishable from reflected waves, leading to inaccurate distance calculations.
Innovation Solution
An additional reception mode is introduced in the ultrasonic detection device, allowing the processor to analyze ambient echoes for signal characteristics before and during detection operations, enabling the identification of interference sources and performing an elimination process to isolate the reflected wave.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the ultrasonic detection device uses a single transceiver module that switches between transmission and reception modes, then the device complexity is reduced, but detection errors occur due to inability to distinguish clutter waves from reflected waves
Solution Approach 1:
The reception function is segmented into two distinct modes: additional reception mode (for capturing ambient echoes without transmission) and preset reception mode (for capturing reflected waves after transmission). This segmentation allows the system to distinguish between clutter waves and reflected waves, resolving the detection error problem while maintaining a single transceiver module.
Solution Approach 2:
The additional reception mode is executed before the preset transmission and reception sequence to preliminarily capture the ambient echo environment. This preliminary action establishes a baseline of clutter waves that can be subtracted from subsequent measurements, improving detection precision without adding complex hardware.
2Productivity
If the device performs detection operations without considering ambient interference, then the detection process is simple and fast, but detection accuracy deteriorates due to interference from external sources
Solution Approach 1:
An intermediary signal processing step is introduced where the ambient echo captured in additional reception mode serves as a reference signal. This intermediary measurement is subtracted from the reflected wave signal to eliminate clutter interference, thereby improving detection accuracy while maintaining relatively fast detection speed through efficient signal subtraction.
3Ease of operation
If the transceiver module continuously switches between transmission and reception modes, then detection operations can be performed, but clutter waves from interference sources are indistinguishable from reflected waves
Solution Approach 1:
The system dynamically adjusts its operation sequence by inserting additional reception mode operations between transmission-reception cycles. This dynamic modification of the operational sequence allows the system to adaptively capture ambient conditions and improve signal identification reliability without compromising the ease of detection operation.
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 effectively eliminates interference, ensuring accurate detection operations by distinguishing clutter waves from reflected waves, thereby improving the precision of distance calculations and reducing errors.
Implementation Method 1
The ultrasonic detection device uses a device to generate a vibration with a specific frequency and transmit an ultrasonic wave to perform a detection. The ultrasonic wave may arrive at a corresponding target object, reflect off the target object, and the reflected wave may be received by the device
Implementation Method 2
the elapsed time from transmitting to receiving the ultrasonic wave may be known as a Time of Flight (abbreviated as TOF). The TOF may thereby be used to calculate a distance from the device generating the ultrasonic wave to the target object
Implementation Method 3
a piezoelectric patch in the transceiver module gradually turns into a stationary state after generating an ultrasonic wave in the manner of vibration
Implementation Method 4
causing the transceiver module to enter an additional reception mode and receive a first ambient echo
Data Source
AI summary
The present invention is directed to an ultrasonic detection device and detection method thereof. The ultrasonic detection device includes a processor and a transceiver module, whereby the transceiver module may be operated to enter an additional reception mode and receive a first ambient echo. The processor may analyze the first ambient echo and generate an analysis result. When the generated analysis result shows that the first ambient echo has a signal characteristic indicative of an interference source in the environment, the transceiver module may again enter the additional reception mode before a detection operation is performed. As a result, an elimination mode may be performed to correctly obtain or distinguish the corresponding reflected wave of the detection operation, thereby avoiding an error of operation, such as distance detection, due to the presence of an interference source.