TWI627430B - Device capable of accurately detecting biological dynamic characteristics or micro-movement of objects - Google Patents

Abstract

A device capable of accurately detecting a biological dynamic characteristic or a micro-movement of an object includes a vibration sensor provided with a millimeter wave signal generator, a transmitting unit, and a receiving unit. The transmitting unit and the receiving unit Electrically connected to the millimeter-wave signal generator respectively; a processing unit electrically connected to the millimeter-wave signal generator of the vibration sensor; wherein the vibration sensor and the processing unit can measure distance based on radar And the principle of digital sampling to calculate and reconstruct the vibration signal of the object under test; thus, the present invention can not only have better penetrating power, so that it can also be applied to the dynamic detection of living organisms, and it can also transmit millimeter waves It has the characteristics of short wavelength, which can achieve the effect of detecting and resolving the fine vibration of objects in a short distance, and can improve the accuracy and fineness of vibration detection, which can greatly improve the application range and practicability of the product.

Description

Device capable of accurately detecting biological dynamic characteristics or micro-movement of objects

The invention relates to a sensing device, in particular to a vibration sensing device.

Vibration sensors can be used to monitor the motion status of objects. Typical applications include seismic sensing, early detection or prevention of mechanical failures, and motion detection of objects or people. They are usually used to measure the vibration of an object. The generated displacement, velocity, acceleration, or other dynamic forces, such as piezoelectricity or piezoresistance (strain), are used to calculate the relevant information or parameters of vibration. They are distinguished by the principle of electromechanical transformation. Common vibration sensors include eddy current type , Capacitive, photoelectric and piezoelectric types.

However, the conventional vibration sensor still has the following improvements: first, it is generally only suitable for sensing a large amplitude or range of vibration, and there is still insufficient detection accuracy; second, the conventional vibration sensor Whether it is a contact type or a non-contact type, the sensor does not have the ability to penetrate the surface of the object, so it cannot be applied to the detection of biological dynamic characteristics (such as the detection of the state of heart activity in the human body), and the application range is relatively limited; The conventional vibration sensor can only provide data of the vibration state of the object, and cannot display the image of the object and its vibration state in a visual manner, which further limits the practicality of the product.

Therefore, how to improve the above-mentioned shortcomings is the technical difficulty that the applicant of this case wants to solve.

In view of the above problems existing in the existing vibration sensors, an object of the present invention is to develop a vibration sensing device capable of improving detection accuracy.

Another object of the present invention is to develop a vibration sensing device capable of detecting biological dynamic characteristics.

Another object of the present invention is to develop a vibration sensing device capable of displaying a vibration simulation image of a test object.

In order to achieve the above object, the present invention provides a device capable of accurately detecting biological dynamic features or micro-movement of an object, including: a vibration sensor, the vibration sensor is provided with a millimeter wave signal generator, a transmitting unit and a A receiving unit, the transmitting unit and the receiving unit are electrically connected to the millimeter wave signal generator; a processing unit, the processing unit is electrically connected to the millimeter wave signal generator of the vibration sensor; wherein, the vibration sensing The millimeter-wave signal generator of the transmitter transmits a millimeter-wave test signal to a test object that generates vibration at a predetermined sampling frequency through the transmitting unit, and then receives each transmitted millimeter-wave test signal through the receiving unit to touch the test object. The millimeter wave reflection signal formed by the reflection of the measured object enables the processing unit to calculate and reconstruct the vibration signal of the measured object based on the principles of radar ranging and digital sampling.

The sampling frequency is greater than the vibration frequency of the test object.

The transmitting unit and the receiving unit constitute a MIMO beamforming smart antenna module.

The image recording unit is electrically connected to the processing unit. The image recording unit is used to capture a real image of the object to be measured.

Further, the processing unit is provided with a post-processing module for vibrating images for Based on the vibration signal and the real image of the test object, a vibration simulation image is generated and generated to simulate the vibration state of the test object.

Furthermore, an image output device is included to display the vibration simulation image.

Further, a 3D depth vision module is used to replace the image recording unit, and the 3D depth vision module is electrically connected to the processing unit.

In this way, in addition to having better penetrating power, which can also be applied to the dynamic detection of living organisms, the invention can also transmit millimeter waves with short wavelength characteristics to achieve detection and resolution in a short distance. The effect of fine vibration of the object can improve the accuracy and fineness of vibration detection, which can greatly improve the application range and practicality of the product.

〔this invention〕

1‧‧‧Vibration Sensor

11‧‧‧ millimeter wave signal generator

12‧‧‧ launch unit

13‧‧‧Receiving unit

2‧‧‧ DUT

3‧‧‧ processing unit

31‧‧‧Vibration image post-production module

4‧‧‧Image recording unit

5‧‧‧Image output device

6‧‧‧3D Deep Vision Module

61‧‧‧light source

62‧‧‧The first image sensor

63‧‧‧Second image sensor

D1 ~ D5‧‧‧Distance

S1‧‧‧ millimeter wave test signal

S2‧‧‧ millimeter wave reflection signal

The first diagram is a schematic structural block diagram of an embodiment of the present invention.

The second figure is a schematic diagram of the operation of transmitting the first millimeter wave test signal of the object under test according to an embodiment of the present invention.

The third diagram is a schematic diagram of the second millimeter wave test signal emitted by the object under test according to an embodiment of the present invention.

The fourth diagram is a schematic diagram of reconstructing the complete vibration signal of the object under test according to an embodiment of the present invention.

The fifth diagram is a schematic diagram of an image output device displaying a vibration simulation image of a test object according to an embodiment of the present invention.

The sixth diagram is a block diagram of the structure of the second embodiment of the present invention.

The seventh diagram is a block diagram of the structure and composition of the 3D depth vision module according to the second embodiment of the present invention.

Please refer to the first figure, which is a structural block diagram of an embodiment of a device capable of accurately detecting biological dynamic features or micro-movement of an object according to the present invention. The device includes: a vibration sensor 1, the vibration sensor 1 A millimeter wave signal generator 11, a transmitting unit 12, and a receiving unit 13 are provided. The transmitting unit 12 and the receiving unit 13 are electrically connected to the millimeter wave signal generator 11, respectively. Please refer to the third section for cooperation. As shown in the figure, the millimeter-wave signal generator 11 is used to generate a millimeter-wave test signal S1 capable of detecting a vibration state of an object 2 to be measured; among them, the millimeter-wave signal generated by the millimeter-wave signal generator 11 The frequency band of the signal S1 may be between 57 and 77 GHz. In this embodiment, the frequency of the millimeter wave test signal S1 is preferably 77 GHz. In addition, the transmitting unit 12 or the receiving unit 13 may be an antenna, more specifically, The transmitting unit 12 or the receiving unit 13 may actually be a single antenna or an antenna array composed of a plurality of antennas. Preferably, the antenna of the transmitting unit 12 or the receiving unit 13 may be provided with beam forming (beamf orming) function. In this embodiment, the transmitting unit 12 includes 3 antennas, and the receiving unit 13 includes 4 antennas. That is, in an embodiment of the present invention, the The transmitting unit 12 and the receiving unit 13 as a whole may be a multiple-input multiple-output beamforming (MIMO beamforming) smart antenna module composed of 7 antennas, so as to improve the signal transmission and reception effect. Of course, the transmitting unit The number and type of the antennas of the 12 or the receiving unit 13 are not limited to those listed above. A processing unit 3 is electrically connected to the millimeter wave signal generator 11 of the vibration sensor 1. The processing unit 3 can be a controller or processor, such as a microcontroller (MCU), a central processing unit (CPU), a graphics processor (GPU), or a digital signal processor (DSP, including an image processor, Image Processor), etc. In addition, the processing unit 3 may further be provided with a vibration image post-production module 31, and the vibration image post-production module 31 may specifically be a software application program; an image output device 5, the image output device 5 and the processing unit 3 The image output device 5 can be various display screens (Display) or projection light machines such as CRT, LCD, OLED, DLP (Digital Light Processing, Digital Light Processing) or LCoS (Liquid Crystal on Silicon). In addition, please refer to FIG. 5 for further cooperation. In some embodiments of the present invention, an image recording unit 4 such as a photographing lens may be further included. The image recording unit 4 is electrically connected to the processing unit 3. , Its purpose will be described later; please refer to the second to fourth figures, assuming that a DUT 2 (such as a motor when it is not running) in a stationary state has a vibration sensor 1 between A distance or distance D (the actual value of the distance D at this time may be an unknown to be solved), when the DUT 2 starts to vibrate at a certain frequency and amplitude (for example, the motor generates ( (Fine) vibration), at this time, the present invention can detect the vibration of the DUT 2 through the following working principle: First, please refer to the second and third figures, the millimeter wave of the vibration sensor 1 Signal production The transmitter 11 can transmit the millimeter wave test signal S1 to the DUT 2 through the transmitting unit 12 at a predetermined sampling rate or sampling frequency. Among them, for correct detection and completeness without distortion To reconstruct or restore the vibration signal generated by the DUT 2, the sampling rate or sampling frequency must be greater than the vibration frequency of the DUT 2. Generally speaking, the sampling frequency can usually be set to a sufficiently large predetermined value. To ensure that the present invention can accurately measure the vibration of the DUT 2, for example, if the vibration frequency of the DUT 2 is 20 Hz, the sampling rate or sampling frequency can be set to 1 kHz or 10 kHz, that is, Let the millimeter-wave signal generator 11 transmit the millimeter-wave test signal S1 to the object 2 to be tested 1000 times or 10,000 times per second. The second figure illustrates that the millimeter-wave signal generator 11 transmits the first millimeter-wave test signal S1. In this case, the millimeter wave test signal S1 will be reflected after touching the object 2 to form a millimeter wave reflection signal S2. In this way, the processing unit 3 can calculate the current DUT 2 The distance D1 between the vibration sensors 1 is the same; the third diagram illustrates the case where the millimeter-wave signal generator 11 emits the second millimeter-wave test signal S1. The processing unit 3 can also calculate the current waiting time. The distance D2 between the measurement object 2 and the vibration sensor 1, and so on. Please refer to the fourth figure again. The present invention can further make the processing unit 3 calculate the The distances D3, D4, D5, etc. detected by the millimeter wave test signal S1 and the corresponding millimeter wave reflection signal S2. In this way, the present invention can reconstruct or restore the vibration signal of the DUT 2 by digital sampling. An important parameter such as the amplitude of the vibration signal of the DUT 2 (ie, half the difference between the maximum distance D _max and the closest distance D _{min of} the DUT 2 from the vibration sensor 1) can be correctly obtained. ) And the vibration frequency, so that the present invention can achieve the purpose of detecting dynamic characteristics such as vibration, chattering or fretting of the object. Of course, the processing unit 3 can also calculate the aforementioned object to be measured 2 and the vibration sensing when it is stationary. The distance D between the sensors 1 (that is, half of the sum of the farthest distance D _max and the shortest distance D _min between the object 2 and the vibration sensor 1, ), Without having to stop the operation of the DUT 2 (such as a motor) first (and some of the DUT 2 such as the vibration of the human heart cannot stop it first and then detect it).

It may be noted that please continue to refer to the second and fifth figures. In some embodiments of the present invention, the image recording unit 4 is further provided, which can be used to capture the actual object 2 Image, so that the vibration image post-production module 31 can The vibration signal of the object 2 and the real image are post-produced and generated a vibration simulation image that can accurately simulate the vibration state of the object 2 to be measured, and the vibration simulation image is transmitted to the image output device 5 for the operator or The user sees that in this way, the present invention can not only detect the vibration of the object 2 but also use images or images to simulate the vibration state of the object 2, so the present invention can be applied to engineering for important components or Fields or important occasions such as monitoring the operating state of components or medically examining various biological characteristics of humans or animals (of course, the application of the present invention is not limited to those listed above), so that the present invention can be extended. Application range and increase its practicality.

Please refer to the first figure. By using the vibration sensor 1 composed of the millimeter wave signal generator 11 to detect the vibration of an object, the present invention can have better penetrating power and can also be applied to living things. In addition to the dynamic detection of the body, it is more important that the millimeter wave has a short wavelength characteristic, which can achieve the effect of detecting and resolving fine vibrations of objects in a short distance. Take the 77GHz millimeter wave signal generator 11 as an example. It can detect the vibration of the 0.05mm amplitude of the object to be measured 2 which is only 25 cm away, so that the present invention can improve the accuracy and fineness of the vibration detection, and can greatly improve the practicability of the present invention.

In addition, please refer to FIG. 6 again, which shows a second embodiment of the present invention. Compared with the embodiment disclosed in FIG. 5, the difference lies in having a 3D depth vision module 6 to replace the image recording unit. 4. The 3D depth vision module 6 is electrically connected to the processing unit 3. The existing 3D depth vision imaging principle can be roughly divided into stereo vision, structured light, and time of flight. , TOF, also known as flight ranging), in this embodiment, the 3D depth vision module 6 is preferably a TOF 3D depth vision module, thereby enabling the present invention to have a better response speed It is suitable for a variety of different environments, and can also reduce the complexity of the algorithm for subsequent applications. Please refer to the system shown in Figure 7 for more details. An embodiment of the detailed structure of a TOF 3D depth vision module. In this embodiment, the 3D depth vision module 6 has a light source 61, a first image sensor 62, and a second image sensor 63. Generally speaking, according to the ranging principle and whether it has the function of capturing physical images, a TOF 3D depth vision module can be composed of at least two image sensors, or it can be composed of only one light transmitter. (Such as the light source 61 in this embodiment) with an image sensor (such as the first image sensor 62 in this embodiment), wherein the single image sensor of the latter is only used as a light receiver It does not have the function of capturing images. For this reason, in the embodiment disclosed in FIG. 7, another image sensor (ie, the second image sensor 63) can be added. For imaging purposes, more specifically, the light source 61 may be an infrared light source such as a far-infrared emitter or a laser light source such as a VCSEL (Vertical Cavity Surface Emitting Laser). The first image sensing 62 and second image sensor 63 Be a CMOS image sensor, whereby the 3D depth perception module 6 and can also provide assistance ranging capturing an image of the physical functions of the DUT 2, and thus can improve the effectiveness of the application of the present invention.

However, the above detailed descriptions are specific descriptions of the preferred embodiments of the present invention. These embodiments are not intended to limit the patent scope of the present invention. Any equivalent implementation or change that does not depart from the spirit of the present invention should Included in the patent scope of this case.

Claims (3)

A device capable of accurately detecting a biological dynamic characteristic or a micro-movement of an object includes a vibration sensor provided with a millimeter wave signal generator, a transmitting unit, and a receiving unit. The transmitting unit and the receiving unit Electrically connected to the millimeter wave signal generator respectively; a processing unit electrically connected to the millimeter wave signal generator of the vibration sensor; an image recording unit, the image recording unit and the processing unit are electrically connected Connected, the image recording unit is used to capture a real image of the object to be measured, and a vibration image post-processing module is provided in the processing unit, which is used to post-process according to the vibration signal of the object and the real image. And generate a vibration simulation image that simulates the vibration state of the test object; wherein the millimeter wave signal generator of the vibration sensor transmits a millimeter of a test object that generates vibration through the transmitting unit at a predetermined sampling frequency Wave test signal, and then receive the millimeter wave test signal transmitted by the receiving unit every time the millimeter wave test signal touches the DUT and is reflected. So that the operation processing unit may reconstruct the vibration signal and the analyte in accordance with principles of radar range and digital sampling. The device capable of accurately detecting biological dynamic features or micro-movement of an object, as described in item 1 of the scope of patent application, further includes an image output device for displaying the vibration simulation image. As described in item 1 of the scope of patent application, the device capable of accurately detecting biological dynamic features or object micro-movements has a 3D depth vision module to replace the image recording unit. The 3D depth vision module is electrically connected to the processing unit. Sexual connection.