Single-transducer ultrasonic touch screen based on space scattering coding structured boundary
A structured, touch-screen technology, applied in the input/output process of instruments, data processing, calculations, etc., can solve problems such as high cost and power consumption, limited applications, complex hardware systems, etc., to achieve system simplification and improve accuracy , cost reduction effect
Pending Publication Date: 2022-08-09
SHANGHAI JIAO TONG UNIV
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Problems solved by technology
[0004] The inventor believes that the existing ultrasonic positioning technology relies on a large number of sensors, the hardware system is complex, and the cost and power consumption are high
The performance of localization and imaging is also greatly related to the layout of the transducer, which limits its application in narrow areas
In addition, the existing ultrasonic touch screen technology relies on two or more transducers, and mainly uses the delay estimation algorithm to locate the touch point. This method still has improvements in cost and power consumption control, spatial resolution and recognition accuracy. space
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[0025] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the inventive concept. These all belong to the protection scope of the present invention.
[0026] like figure 1 As shown, a single-transducer ultrasonic touch screen based on a spatially scatter-coded structured boundary provided according to the present invention includes: a structured boundary 1, a touch screen 2, and a piezoelectric transducer 3; the touch screen 2 is arranged on the structured boundary 1 Inside; the piezoelectric transducer 3 is arranged on the structured boundary 1, used to excite the ultrasonic signal on the touch screen 2, and receive the echo signal; the structured boundary 1...
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The invention provides a single-transducer ultrasonic touch screen based on a space scattering coding structured boundary, which relates to an active elastic wave target positioning technology, and comprises a structured boundary, a touch screen and a piezoelectric transducer, the touch screen is arranged in the structured boundary; the piezoelectric transducer is arranged on the structured boundary and is used for exciting an ultrasonic signal on the touch screen and receiving an echo signal; the structured boundary is composed of scatterer units and is used for carrying out space scattering coding on ultrasonic waves. By using the single piezoelectric transducer, the input characters can be accurately recognized, multi-channel data acquisition is not needed, system simplification is facilitated, cost reduction is facilitated, and power consumption reduction is facilitated.
Description
technical field [0001] The invention relates to an active elastic wave target positioning technology, in particular, to a single-transducer ultrasonic touch screen based on spatial scattering coding structured boundaries. Background technique [0002] The use of active acoustic waves and elastic waves to locate and image objects is an important technology, which is widely used in structural health inspection, medical imaging, human-computer interaction and other fields. In the prior art, target positioning and imaging are mainly achieved by transmitting ultrasonic pulses and receiving echoes of objects through a transducer array. The time delay between the transmission of the wave and the observation contains the position information of the object, which can be combined with the signal processing algorithm to identify the position of the target object. [0003] There is a Chinese patent with publication number CN111722750A, which discloses a new type of touch screen impleme...
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IPC IPC(8): G06F3/041G06F3/043
CPCG06F3/0412G06F3/043
Inventor 何清波姜添曦廖昕昕黄浩彭志科
Owner SHANGHAI JIAO TONG UNIV