Ultrasonic Transducer Control Circuit Single Command Sequences
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Solution Overview
Problem
Existing ultrasonic transducer control circuits require separate commands and handshaking to initiate short and long excitation signal sequences, increasing processing burden and bus traffic for the system controller.
Innovation Solution
A control circuit that initiates both short and long excitation signal sequences in response to a single command, with automatic monitoring periods for echo signals, reducing the need for additional handshaking and allowing simultaneous detection of objects at short and long distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate commands and handshaking are used to initiate short and long excitation signal sequences, then the system controller can control each sequence independently, but the processing burden and bus traffic for the system controller increase
Solution Approach 1:
The patent combines the control of short and long excitation signal sequences into a single command structure. The control circuit receives one command that triggers both sequences, eliminating the need for separate commands and handshaking for each sequence, thereby reducing processing burden and bus traffic while maintaining independent control capability through internal sequence management
2Ease of operation
If multiple excitation signal sequences are initiated with separate commands, then each sequence can be controlled individually, but the communication overhead between controller and control circuit increases
Solution Approach 1:
The patent merges multiple command transmissions into a single command that initiates both short and long excitation sequences. This reduces the number of communication events between the system controller and control circuit, minimizing bus traffic and communication overhead while preserving the ability to control each sequence individually through internal circuit logic
3Loss of time
If the control circuit waits for separate commands for each excitation sequence, then precise timing control is maintained, but the processing efficiency and speed of detection decrease
Solution Approach 1:
The patent implements preliminary action by having the control circuit internally prepared to execute both short and long excitation sequences immediately upon receiving a single command. This eliminates the time delay associated with waiting for separate commands while maintaining precise timing control through pre-configured sequence timing parameters stored in the control circuit
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 processing burden and bus traffic for the system controller, enabling efficient detection of objects at various distances with reduced communication overhead and improved processing efficiency.
Implementation Method 1
Ultrasonic transducers typically are piezoelectric transducers where piezoelectric crystals change size and shape when a voltage is applied. An applied AC voltage causes them to oscillate at the same frequency and produce ultrasonic sound.
Implementation Method 2
Since piezoelectric materials generate a voltage when force is applied to them, they can also work as ultrasonic detectors.
Data Source
AI summary
An ultrasonic detection circuit includes a transmitter circuit that provides excitation signals to an ultrasonic transducer during an excitation interval. A control circuit includes a port to receive a command. The control circuit controls the frequency and the duty cycle of the excitation signals of the transmitter circuit during the excitation interval. The control circuit generates a first excitation signal sequence of the excitation interval followed by a first monitoring period to receive a first echo signal in response to the command. The control circuit generates a second excitation signal sequence of the excitation interval followed by a second monitoring period to receive a second echo signal in response to the command. The control circuit outputs results via the port based on at least one of the first or second echo signals received.