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Ultrasonic signal processing circuit of multimedia electronic whiteboard

A signal processing circuit, electronic whiteboard technology, applied in improving amplifiers to reduce temperature/power voltage changes, electrical components, improving amplifiers to reduce noise effects, etc., can solve the problems of inaccurate positioning, low real-time performance, etc. Good, improve positioning accuracy and real-time, high real-time effect

Pending Publication Date: 2020-03-06
深圳市智微智能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current interactive electronic whiteboard still has the defects of inaccurate positioning and low real-time performance.

Method used

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  • Ultrasonic signal processing circuit of multimedia electronic whiteboard
  • Ultrasonic signal processing circuit of multimedia electronic whiteboard
  • Ultrasonic signal processing circuit of multimedia electronic whiteboard

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0028] see figure 1 , The invention discloses a multimedia electronic whiteboard ultrasonic signal processing circuit to improve the real-time performance and positioning accuracy of the electronic whiteboard. The ultrasonic signal processing circuit of the multimedia electronic whiteboard includes: a sending circuit and a receiving circuit; the sending circuit sends an ultrasonic control signal, and the receiving circuit receives the ultrasonic control signal; when the sending unit sends the ultrasonic control signal, the ultrasonic signal weakened during transmission. The receiving circuit includes a receiving probe 1, a control subcircuit 2, an amplifying subcircuit 3, a peak detection subcircuit 4 and a gain compensation subcircuit 5; the receiving probe 1 is electrically connected to the amplifying subcircuit 3; the receiving probe 1. The amplification subcircuit 3, the peak detection subcircuit 4 and the gain compensation subcircuit 5 are respectively electrically conne...

Embodiment 2

[0042] The invention also discloses a method, which includes a multimedia electronic whiteboard ultrasonic signal processing circuit for improving real-time performance and positioning accuracy, and the multimedia electronic whiteboard ultrasonic signal processing circuit is the multimedia electronic whiteboard described in any one of the above embodiments Ultrasonic signal processing circuit. Since the multimedia electronic whiteboard ultrasonic signal processing circuit of this embodiment has the same structure as the multimedia electronic whiteboard ultrasonic signal processing circuit described in any of the above embodiments, it also has the same technical effect, and its structure will not be repeated here. Described method specifically comprises:

[0043] S1, sending ultrasonic control signals;

[0044] S2. Receive the ultrasonic control signal;

[0045] S3. Perform noise reduction and amplification on the ultrasonic control signal;

[0046] S4. Extracting the maximu...

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Abstract

The invention discloses an ultrasonic signal processing circuit of a multimedia electronic whiteboard. The ultrasonic signal processing circuit of the multimedia electronic whiteboard comprises a transmitting circuit and a receiving circuit; the transmitting circuit transmits an ultrasonic control signal, and the receiving circuit receives the ultrasonic control signal; the ultrasonic control signal is subjected to noise reduction and amplification by the amplification sub-circuit; the peak detection sub-circuit detects the ultrasonic control signal which is subjected to noise reduction and amplification by the amplification sub-circuit and extracts the maximum voltage value of the ultrasonic control signal and transmits the maximum voltage value to the control sub-circuit, the control sub-circuit acquires the gain compensation amount of the ultrasonic wave according to the maximum voltage value, and the gain compensation sub-circuit performs gain compensation on the ultrasonic controlsignal according to the gain compensation amount. The ultrasonic signal processing circuit has the advantages of being accurate in positioning, high in real-time performance and good in interactivity.

Description

technical field [0001] The invention relates to the technical field of electronic whiteboards, in particular to an ultrasonic signal processing circuit of a multimedia electronic whiteboard. Background technique [0002] In the field of electronic whiteboard technology, an interactive electronic whiteboard is a highly interactive electronic product that can write, project, operate a computer, and record written content. The interactive electronic whiteboard can replace traditional blackboards and projection screens. Wide-screen display technology and electronic whiteboard control technology have become a new type of computer interactive input and output device, which is especially suitable for teaching and office meetings because of its strong interactivity. With the development of network technology, interactive electronic whiteboards are developing in the direction of multi-function, remote monitoring, intelligence, ultra-wide screen and precision. [0003] However, the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/68H03F3/183H03F1/26H03F1/30H03G3/30
CPCH03F3/68H03F3/183H03F1/26H03F1/302H03G3/3089H03G3/3005
Inventor 周隆金梁小龙孙国兵
Owner 深圳市智微智能科技股份有限公司