Near-field communication system based on magnetic field coding
A near-field communication and coding technology, applied in the field of the Internet of Things, can solve problems such as manual wake-up and difficult product control operations, and achieve the effects of low power consumption, low cost, and high reliability
Inactive Publication Date: 2019-10-22
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology
On some products with no button design, how to perform simple control operations on the product has become a difficult point, especially after the product enters the autonomous sleep state, it cannot be manually woken up
Method used
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[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementations obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0020] In any embodiment, such as Figure 1-3 As shown, the near field communication system based on magnetic field coding of the present application includes a transmitting end circuit and a receiving end circuit;
[0021] The receiving end circuit is composed of a main control MCU and a geomagnetic sensor circuit. The main control MCU controls the geomagnetic sensor to scan the geomagnetic intensity changes in real time; the transmitting end circuit...
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The invention discloses a near-field communication system based on magnetic field coding. The near-field communication system comprises a transmitting end circuit and a receiving end circuit. The receiving end circuit is composed of a main control MCU and a geomagnetic sensor circuit, and the main control MCU controls a geomagnetic sensor to scan geomagnetic intensity changes in real time. The transmitting end circuit is composed of a main control MCU and a coil circuit. The main control MCU controls the coil circuit to send out electromagnetic signals with specific codes. The transmitting endcircuit generates a magnetic field through the MCU control coil to interfere with an earth magnetic field near the receiving end circuit, and the receiving end circuit acquires geomagnetic intensitythrough the geomagnetic sensor so as to sense magnetic field change, receive magnetic field change information and then decode the magnetic field change information. Non-contact one-way control and communication are realized by utilizing the change of the magnetic field intensity, the cost is low, the power consumption is low, the reliability is high, a special communication chip is not needed, and simple communication and control can be realized.
Description
Technical field [0001] The invention relates to the technical field of the Internet of Things, and in particular to a near field communication system based on magnetic field coding. Background technique [0002] At present, most IoT products require low-power design to reduce battery power supply pressure and increase endurance. Therefore, it is necessary to reduce power consumption through circuit sleep when the product is idle. Moreover, some products have high-grade waterproof requirements, which requires that the one-time structure and damage prevention of the product design should be considered. In some products with no button design, how to perform simple control operations on the product becomes a difficult point, especially after the product enters the autonomous sleep state, it cannot be manually awakened. Summary of the invention [0003] In view of the above problems, the present invention proposes a near field communication system based on magnetic field coding to rea...
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Login to View More IPC IPC(8): H04B5/02H04W4/80H04K3/00
CPCH04W4/80H04K3/62H04B5/48Y02D30/70
Inventor 寇望东姜海洋李红建
Owner SICHUAN CHANGHONG ELECTRIC CO LTD