US-20260126317-A1 - ELECTROMAGNETIC COUPLING SENSING DEVICE, SIGNAL MEASUREMENT METHOD, AND RELATED ELECTRONIC DEVICE

US20260126317A1US 20260126317 A1US20260126317 A1US 20260126317A1US-20260126317-A1

Abstract

An electromagnetic coupling sensing device includes a frequency generation module, a first resonant module, a second resonant module, and an echo acquisition and processing module. The first resonant module generates a primary resonant signal based on the frequency setting signal generated by the frequency generation module. The second resonant module couples with the first resonant module through a coupling capacitance to generate a secondary resonant signal based on the primary resonance signal. The second resonant module includes a coil. A ferrite is provided in the coil and a height of the coil is higher than the ferrite. The coil is capable of carrying a weight to be measured to deform such that an intrinsic frequency of the electromagnetic coupling sensing device changes. The echo acquisition and processing module collects the secondary resonant signal and outputs a voltage signal changing according to the intrinsic frequency.

Inventors

Fang Zheng

Assignees

SMYZE INTELLIGENCE TECHNOLOGY(SHANGHAI) CO.,LTD

Dates

Publication Date: 20260507
Application Date: 20251219
Priority Date: 20230313

Claims (20)

1 . An electromagnetic coupling sensing device, comprising: a frequency generation module configured to provide a frequency setting signal; a first resonant module configured to generate a first resonant signal based on the frequency setting signal; and a second resonant module coupled to the first resonant module through a coupling capacitance and configured to generate a second resonant signal in response to the first resonant signal; wherein the second resonant module comprises: a coil disposed along a Z-axis direction; and a ferrite arranged inside the coil, wherein a height of the coil is greater than a height of the ferrite; wherein the coil is mechanically deformable in the Z-axis direction when bearing a weight to be measured, such that an intrinsic resonant frequency of the electromagnetic coupling sensing device varies according to a deformation of the coil in the Z-axis direction.
2 . The electromagnetic coupling sensing device of claim 1 , further comprising: an echo acquisition and processing module electrically connected to the second resonant module and configured to detect the second resonant signal and output a voltage signal corresponding to the intrinsic resonant frequency of the electromagnetic coupling sensing device.
3 . The electromagnetic coupling sensing device of claim 2 , further comprising a power module configured to convert an input DC voltage into a regulated and filtered voltage to supply the frequency generation module and the echo acquisition and processing module.
4 . The electromagnetic coupling sensing device of claim 3 , wherein the power module is configured to operate with an input voltage selected from 5 V, 9 V or 12 V, and to output a regulated voltage of 3.3 V or 5 V.
5 . The electromagnetic coupling sensing device of claim 1 , wherein the electromagnetic coupling sensing device is configured to operate in a coupling condition by adjusting an equivalent resistance of the second resonant module such that a coupling coefficient between the first resonant module and the second resonant module approaches a value.
6 . The electromagnetic coupling sensing device of claim 1 , wherein the first resonant module and the second resonant module form two coupled inductor-capacitor (LC) resonant loops, and an intrinsic mode of the electromagnetic coupling sensing device is determined according to a Hamiltonian matrix characterizing oscillation states of the two LC resonant loops.
7 . The electromagnetic coupling sensing device of claim 1 , wherein the frequency generation module provides a fixed-frequency excitation, and a reflection voltage of the electromagnetic coupling sensing device increases when a deformation of the coil causes a deviation of the intrinsic resonant frequency from the fixed excitation frequency.
8 . The electromagnetic coupling sensing device of claim 1 , wherein the deformation of the coil causes an inductance of the coil to increase from a first inductance value in a relaxed state to a second inductance value when bearing a weight, and a change in the inductance of the coil corresponds to a deformation range associated with a measurable weight range.
9 . The electromagnetic coupling sensing device of claim 8 , wherein the inductance of the coil varies within a predetermined inductance range corresponding to a height change of the coil between a first height in the relaxed state and a second height when bearing the weight.
10 . The electromagnetic coupling sensing device of claim 8 , wherein the measurable weight range is defined according to a mapping between the deformation of the coil and a frequency shift of the intrinsic resonant frequency of the electromagnetic coupling sensing device.
11 . A method of measuring signal applied to an electromagnetic coupling sensing device, the electromagnetic coupling sensing device comprising: a frequency generation module configured to provide a frequency setting signal; a first resonant module configured to generate a first resonant signal based on the frequency setting signal; and a second resonant module coupled to the first resonant module through a coupling capacitance and configured to generate a second resonant signal in response to the first resonant signal; wherein the second resonant module comprises: a coil disposed along a Z-axis direction; and a ferrite arranged inside the coil, wherein a height of the coil is greater than a height of the ferrite; wherein the coil is mechanically deformable in the Z-axis direction when bearing a weight to be measured, such that an intrinsic resonant frequency of the electromagnetic coupling sensing device varies according to a deformation of the coil in the Z-axis direction. wherein the method comprises: connecting to a power supply; and placing an object to be measured on the coil to deform the coil.
12 . The method of claim 11 , wherein the electromagnetic coupling sensing device further comprises: an echo acquisition and processing module electrically connected to the second resonant module and configured to detect the second resonant signal and output a voltage signal corresponding to the intrinsic resonant frequency of the electromagnetic coupling sensing device. wherein the method further comprises: measuring the voltage signal output by the echo acquisition and processing module, wherein the voltage signal changes according to the intrinsic resonant frequency of the electromagnetic coupling sensing device.
13 . An electronic device, comprising: an electromagnetic coupling sensing device, wherein the electromagnetic coupling sensing device comprises: a frequency generation module configured to provide a frequency setting signal; a first resonant module configured to generate a first resonant signal based on the frequency setting signal; and a second resonant module coupled to the first resonant module through a coupling capacitance and configured to generate a second resonant signal in response to the first resonant signal; wherein the second resonant module comprises: a coil disposed along a Z-axis direction; and a ferrite arranged inside the coil, wherein a height of the coil is greater than a height of the ferrite; wherein the coil is mechanically deformable in the Z-axis direction when bearing a weight to be measured, such that an intrinsic resonant frequency of the electromagnetic coupling sensing device varies according to a deformation of the coil in the Z-axis direction.
14 . The electronic device of claim 13 , further comprising: an echo acquisition and processing module electrically connected to the second resonant module and configured to detect the second resonant signal and output a voltage signal corresponding to the intrinsic resonant frequency of the electromagnetic coupling sensing device.
15 . The electronic device of claim 14 , further comprising a power module configured to convert an input DC voltage into a regulated and filtered voltage to supply the frequency generation module and the echo acquisition and processing module.
16 . The electromagnetic coupling sensing device of claim 15 , wherein the power module is configured to operate with an input voltage selected from 5 V, 9 V or 12 V, and to output a regulated voltage of 3.3 V or 5 V.
17 . The electronic device of claim 13 , wherein the electromagnetic coupling sensing device is configured to operate in a coupling condition by adjusting an equivalent resistance of the second resonant module such that a coupling coefficient between the first resonant module and the second resonant module approaches a value.
18 . The electronic device of claim 13 , wherein the first resonant module and the second resonant module form two coupled inductor-capacitor (LC) resonant loops, and an intrinsic mode of the electromagnetic coupling sensing device is determined according to a Hamiltonian matrix characterizing oscillation states of the two LC resonant loops.
19 . The electronic device of claim 13 , wherein the frequency generation module provides a fixed-frequency excitation, and a reflection voltage of the electromagnetic coupling sensing device increases when a deformation of the coil causes a deviation of the intrinsic resonant frequency from the fixed excitation frequency.
20 . The electronic device of claim 13 , wherein the deformation of the coil causes an inductance of the coil to increase from a first inductance value in a relaxed state to a second inductance value when bearing a weight, and a change in the inductance of the coil corresponds to a deformation range associated with a measurable weight range.

Description

CROSS REFERENCE TO RELATED APPLICATION This application is a continuation application of U.S. application Ser. No. 18/454,988, filed on Aug. 24, 2023, which claims the priority of Chinese Patent Application No. 202310244957X, entitled “ELECTROMAGNETIC COUPLING SENSING DEVICE, SIGNAL MEASUREMENT METHOD, AND RELATED ELECTRONIC DEVICE”, filed on Mar. 13, 2023, the disclosure of which is incorporated herein by reference in its entirety. FIELD OF THE DISCLOSURE The present disclosure relates to electronic circuit technologies, in particular to an electromagnetic coupling sensing device, a signal measurement method and a related electronic device. BACKGROUND With the popularity of global artificial intelligence scenarios, machinery and equipment have been widely used in assembly lines to replace workers to participate in heavy manual labor and thus greatly improves social production efficiency. On the other hand, mechanical equipment has gradually been popularized to people's homes, such as intelligent sweeping robots, coffee machines, and food delivery robots. Whether it is industrialization scenarios or daily life scenarios, there is a problem of raw material supply in intelligent equipment. Therefore, it is necessary to detect the remaining amount of raw materials in order to replenish them in time when the materials are not enough, so as to avoid the waste of resources caused by the machine being unable to work due to the shortage of materials. Conventionally, solid materials are usually measured by piece, length and weight. For liquids and gases, volume measurement (or flow measurement) and weight measurement are usually used. Generally, volume sensors or weight sensors are used for measurement, but both volume and weight sensing sensors are linear devices, so their sensitivity is limited by the mechanism of the device itself. SUMMARY One objective of an embodiment of the present disclosure is to improve the accuracy of existing gas/liquid quality detection. According to an embodiment of the present disclosure, an electromagnetic coupling sensing device is disclosed. The electromagnetic coupling sensing device includes: a frequency generation module, a first resonant module, a second resonant module, and an echo acquisition and processing module. The frequency generation module generates a frequency setting signal. The first resonant module generates a primary resonant signal based on the frequency setting signal. The second resonant module couples with the first resonant module through a coupling capacitance to generate a secondary resonant signal based on the primary resonance signal. The second resonant module comprises a coil disposed in a Z direction. A ferrite is provided in the coil and a height of the coil is higher than the ferrite. The coil is capable of carrying a weight to be measured to deform such that an intrinsic frequency of the electromagnetic coupling sensing device changes. The echo acquisition and processing module which is electrically connected to the second resonant module collects the secondary resonant signal and outputs a voltage signal changing according to the intrinsic frequency of the electromagnetic coupling sensing device. Furthermore, the echo acquisition and processing module comprises a sampling unit, an operation amplification unit and a voltage comparison unit. A current of the secondary resonant signal sequentially passes through the sampling unit, the operation amplification unit and the voltage comparison unit to output the voltage signal. Furthermore, the electromagnetic coupling sensing device further includes a microprocessor electrically connected to the output of the voltage comparison unit. The microprocessor receives the voltage signal to output quality data. Furthermore, the frequency generation module comprises a crystal oscillator, and the electromagnetic coupling sensing device further comprises a microprocessor, a driving circuit and a switch circuit. The switch circuit comprises a first switch and a second switch, sources of the first switch and the second switch are electrically connected to a common end. A drain of the first switch is electrically connected to the first resonant module and a DC power supply. A drain of the second switch is electrically connected to the second resonant module. The microprocessor is connected to the driving circuit connected to the drain of the first switch and the drain of the second switch. The driving circuit is further electrically connected to gates of the first switch and the second switch, so as to change the DC power supply into a square wave of the same frequency as the crystal oscillator to input the square wave into the first resonant module and the second resonant module. Furthermore, the coil is a copper coil, and a diameter range of the coil is 0.2 mm-1 mm. Furthermore, a number of turns of the coil ranges from 5 turns-100 turns. Furthermore, a thickness range of the ferrite is 33%-66% of the height of the c