CN-121985905-A - Vibration detection device and vibration detection method

CN121985905ACN 121985905 ACN121985905 ACN 121985905ACN-121985905-A

Abstract

A vibration detection device is provided with a radio wave sensor (11) for detecting a change in a nearby electromagnetic field, an inertial sensor (12), and a signal processing device (2) for inputting waveform data of the radio wave sensor and waveform data of the inertial sensor into a learning model and acquiring an estimation result of vibration estimated by the learning model from the learning model.

Inventors

WADA HIROKI
IZUMI SHINTARO
Nishimoto is ground and is realized

Assignees

三菱电机株式会社

Dates

Publication Date: 20260505
Application Date: 20231010

Claims (9)

1. A vibration detecting device, wherein, The device is provided with: A radio wave sensor for detecting a change in a nearby electromagnetic field; inertial sensor, and And a signal processing device that inputs the waveform data of the radio wave sensor and the waveform data of the inertial sensor into a learning model, and acquires an estimation result of the vibration estimated by the learning model from the learning model.
2. The vibration detecting apparatus according to claim 1, wherein, The radio wave sensor, the inertial sensor, and the signal processing device are disposed on the same substrate.
3. The vibration detecting apparatus according to claim 1 or 2, wherein, The above-mentioned electric wave sensor detects a change in an electromagnetic field caused by movement of the lungs of a person as a detection target, The inertial sensor detects local vibrations caused by the movement of the lungs, The signal processing device estimates a peak value of the respiration of the person as the vibration.
4. The vibration detecting apparatus according to claim 1 or 2, wherein, The above-mentioned electric wave sensor detects a change in an electromagnetic field caused by the movement of the heart of a person as a detection object, The inertial sensor detects local vibrations caused by the motion of the heart, The signal processing device estimates a peak value of the respiration of the person as the vibration.
5. The vibration detecting apparatus according to any one of claims 1 to 4, wherein, The radio wave sensor includes: a signal generating unit that generates a high-frequency signal; an antenna for transmitting the high-frequency signal generated by the signal generating unit; A detection circuit for detecting an input signal to generate a detection signal and outputting the generated detection signal, and And a distribution circuit having a first terminal, a second terminal, and a third terminal, wherein the first terminal is connected to the signal generating unit, the second terminal is connected to the detection circuit, the third terminal is connected to the antenna, a signal input to the first terminal is output from the third terminal, and a signal input to the third terminal is distributed to the first terminal and the second terminal and output.
6. The vibration detecting apparatus according to any one of claims 1 to 4, wherein, The radio wave sensor includes: a signal generating unit that generates a high-frequency signal; an antenna for transmitting the high-frequency signal generated by the signal generating unit; a detection circuit configured to detect an input signal, generate a detection signal, and output the generated detection signal; a distribution circuit having a first terminal connected to the signal generating section, a second terminal connected to the detection circuit, outputting a signal input to the first terminal from the third terminal, and distributing a signal input to the third terminal to the first terminal and the second terminal and outputting the signal, and A matching circuit having a fourth terminal connected to the third terminal of the distribution circuit and a fifth terminal connected to the antenna, and having a variable element, The signal processing device outputs a control signal to the matching circuit to control the adjustment value of the variable element so that the impedance of the fourth terminal of the matching circuit matches the impedance of the fifth terminal, based on the value of the detection signal output from the detection circuit.
7. The vibration detecting apparatus according to any one of claims 1 to 4, wherein, The radio wave sensor includes: a signal generating unit that generates a high-frequency signal; an antenna for transmitting the high-frequency signal generated by the signal generating unit; a detection circuit (5) for detecting an input signal, generating a detection signal, and outputting the generated detection signal; A first distribution circuit having a first terminal, a second terminal, and a third terminal, the second terminal being connected to the detection circuit, the third terminal outputting a signal input to the first terminal, and distributing a signal input to the third terminal to the first terminal and the second terminal and outputting the signal; A second distribution circuit having a fourth terminal connected to the signal generating section, a fifth terminal connected to the first terminal of the first distribution circuit, and a sixth terminal connected to the detection circuit, the second distribution circuit outputting a signal input to the fifth terminal from the fourth terminal and distributing a signal input to the fourth terminal to the fifth terminal and the sixth terminal and outputting the signal, and the third distribution circuit A matching circuit having a seventh terminal connected to the third terminal of the first splitter circuit and an eighth terminal connected to the antenna, and having a variable element, The detection circuit generates an IQ signal by quadrature-detecting the signal input from the first distribution circuit using the signal input from the second distribution circuit as a local signal, and outputs the generated IQ signal as the detection signal, The signal processing device outputs a control signal to the matching circuit to control the adjustment value of the variable element so that the impedance of the seventh terminal of the matching circuit matches the impedance of the eighth terminal, based on the value of the detection signal output from the detection circuit.
8. The vibration detecting apparatus according to any one of claims 5 to 7, wherein, The antenna has a square shape, and if the wavelength of the high-frequency signal is lambda, the length of 1 side of the square shape on the outermost side of the antenna is lambda/10 or less.
9. A vibration detection method based on a vibration detection device provided with a radio wave sensor, an inertial sensor, and a signal processing device, wherein the method comprises the following steps: the electric wave sensor detects a change in the electromagnetic field in the vicinity; The inertial sensor detects local vibration of the detection object, and The signal processing device inputs the waveform data of the radio wave sensor and the waveform data of the inertial sensor into a learning model, and obtains an estimation result of the vibration estimated by the learning model from the learning model.

Description

Vibration detection device and vibration detection method Technical Field The present disclosure relates to vibration detection techniques. Background Patent document 1 discloses a technique relating to a pulse information processing apparatus that processes pulse information indicating a pulse of a passenger of a mobile object, the technique including an information acquisition unit that is capable of acquiring, as pulse information of the passenger, first pulse information acquired by a first pulse information acquisition device and second pulse information acquired by a second pulse information acquisition device in a different method from the first pulse information acquisition device, together with reliability information indicating the reliability of the second pulse information, and an information selection unit that selects, based on the reliability information, which of the first pulse information and the second pulse information is to be output as the pulse information of the passenger. Patent document 1 Japanese patent laid-open No. 2020-103061 According to the technique of patent document 1, since either one of the first pulse information and the second pulse information is selected as the passenger's pulse information alternatively based on the reliability information indicating the reliability of the second pulse information, there is a problem in that the measurement accuracy is lowered when there is a data loss in the selected first pulse information or second pulse information. Disclosure of Invention The present disclosure has been made in view of the above-described problems, and an object thereof is to provide a vibration detection technique capable of suppressing a decrease in measurement accuracy due to data loss. In one aspect, a vibration detection device according to an embodiment of the present disclosure includes a radio wave sensor that detects a change in a nearby electromagnetic field, an inertial sensor, and a signal processing device that inputs waveform data of the radio wave sensor and waveform data of the inertial sensor into a learning model, and obtains an estimation result of vibration estimated by the learning model from the learning model. According to the vibration detection device of the embodiment of the present disclosure, it is possible to suppress a decrease in measurement accuracy due to a data loss. Drawings Fig. 1A is a configuration diagram of the vibration detection apparatus. Fig. 1B is a flowchart showing an example of the operation of the vibration detection apparatus. Fig. 2 is a configuration diagram of the vibration detection apparatus. Fig. 3A is a diagram showing an example of a loop antenna. Fig. 3B is a diagram showing an example of a meandered dipole antenna. Fig. 4 is a configuration diagram of the signal processing apparatus. Fig. 5 is a configuration diagram of the vibration detection apparatus. Fig. 6 is a configuration diagram of the vibration detection apparatus. Fig. 7 is a configuration diagram of the signal processing apparatus. Fig. 8 is a flowchart of adaptive control of the matching circuit by the vibration detection apparatus. Fig. 9 is a configuration diagram of the vibration detection apparatus. Fig. 10 is a diagram showing waveforms obtained by the vibration detection device and the electrocardiograph. Fig. 11 is a graph showing a comparison result obtained by comparing, for each subject, a peak interval of a heart beat waveform deduced using CVAE (Conditional Variational AutoEncoder) with a value of RMSE (Root Mean Square Error) of a peak interval of an electrocardiogram waveform as a positive solution value. Detailed Description Various embodiments in the present disclosure are described in detail below with reference to the drawings. In the drawings, the same or similar portions are denoted by the same or similar reference numerals, and repetitive description of such portions is omitted. In addition, in this disclosure, the term "or" is used in the sense of an inclusive logical sum unless specifically indicated otherwise. Embodiment 1 < Constitution > The configuration of the vibration detection device D1 according to embodiment 1 will be described with reference to fig. 1A. Fig. 1A is a configuration diagram showing a vibration detection device D1 according to embodiment 1. As shown in fig. 1A, the vibration detection device D1 includes a sensor unit 1 and a signal processing device 2. The sensor unit 1 is composed of a radio wave sensor 11 and an inertial sensor 12. The radio wave sensor 11 is a nearby electromagnetic field type radio wave sensor that detects a change in an electromagnetic field in the vicinity of the radio wave sensor 11 using a small antenna having a wavelength smaller than that used for the radio wave sensor 11. By using a small antenna with low radiation efficiency, only the electromagnetic field variation in the vicinity of the radio wave sensor 11 is detected. In the present disclosure, "vicinity" refer