Induction key detecting method and detecting device
A detection method and technology of a detection device are applied in the direction of virtual key detection/prevention, keyboard-like device coding, coding, etc., which can solve the problems of high hardware cost and low flexibility, and achieve the effect of reducing hardware cost and improving flexibility.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0028] Example 1
[0029] figure 1 It is a typical structure of a capacitive sensing button detection device, which mainly includes a number of buttons, a port selector, a pulse generation module and a processor. The processor is equipped with a counter and a timer. The pulse generation module receives the button signal selected by the port selector to generate a pulse signal, the counter receives the pulse signal, and the processor processes the pulse signal received in different time periods to determine the state of the induction button.
[0030] In one embodiment, the circuit structure of the pulse generation module is as figure 2 As shown, the constant current source a is used as a power source to realize current control and improve the voltage linearity of the generated signal, and b is a capacitive sensing button.
[0031] The control module of this embodiment is controlled by software, which simplifies the hardware circuit, interrupts and collects data automatically, reduces...
Example Embodiment
[0032] Example 2
[0033] Using the method of detecting a capacitive sensing button with the device of the above embodiment, by continuously collecting pulse signals and comparing them, it is determined whether the capacitance in the circuit of the pulse generating module has changed. Correspondingly, it can be known whether the sensing button is pressed, which specifically includes the following steps:
[0034] Step1: Initialize the pulse generation module and processor;
[0035] Step2: Process the pulse signal data read from each channel several times to obtain the reference signal;
[0036] Step3, trigger interrupt program;
[0037] Step4. Read the pulse signal data from the current channel once in the interrupt program as a real-time signal;
[0038] Step5. Compare the reference signal and the real-time signal. If the absolute value of the difference between the two is greater than the set threshold, it means that the sensor button is pressed during the interruption time, otherwise i...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap