WO2017219239A1

WO2017219239A1 - Detector for detecting state of physiological tissue, and detection method thereof

Info

Publication number: WO2017219239A1
Application number: PCT/CN2016/086563
Authority: WO
Inventors: 刘彤浩; 栾远涛
Original assignee: 悦享趋势科技（北京）有限责任公司
Priority date: 2016-06-21
Filing date: 2016-06-21
Publication date: 2017-12-28

Abstract

A detector for detecting a state of physiological tissue, and a detection method thereof. The detector comprises: a first electrode (11) and a second electrode (12), the first electrode (11) and the second electrode (12) constituting a first transceiver electrode pair; a third electrode (13), the first electrode (11) and the third electrode (13) constituting a second transceiver electrode pair; a first transceiver circuit (15), a transmitting end of the first transceiver circuit (15) being connected to the first electrode (11), and a receiving end of the first transceiver circuit (15) being connected to the second electrode (13); and a second transceiver circuit (16), a transmitting end of the second transceiver circuit (16) being connected to the first electrode (11), a receiving end of the second transceiver circuit (16) being connected to the third electrode (13), and signals transmitted by the first transceiver circuit (15) and the second transceiver circuit (16) having different frequencies. The detector resolves the technical problem in the prior art of inaccurate detection results due to that signals detected by a detection approach of detecting motion information of physiological tissue using the Doppler effect are weak and apt to be interfered.

Description

Detector for detecting physiological tissue state and detection method thereof

Technical field

The present application relates to the field of detection, and in particular to a detector for detecting a state of physiological tissue and a method of detecting the same.

Background technique

Intravascular blood flow velocity and blood flow have certain value for the diagnosis of cardiovascular diseases, especially for oxygen supply during the circulation, atresia, turbulence, vascular atherosclerosis, etc. can provide valuable diagnosis.

In order to check the movement state of the heart and blood vessels, and to understand the blood flow velocity, it can be achieved by transmitting ultrasound. Since the blood in the blood vessel is a flowing object, a Doppler effect is generated between the ultrasonic vibration source and the relatively moving blood. When the blood moves toward the ultrasonic source, the wavelength of the reflected wave is compressed, and thus the frequency is increased. When the blood leaves the super-source movement, the wavelength of the reflected wave becomes longer and the frequency becomes smaller. The amount by which the frequency of the reflected wave is increased or decreased is proportional to the flow velocity of the blood, so that the flow rate of the blood can be measured based on the amount of frequency shift of the ultrasonic wave.

The signal detected by the Doppler effect detection method is very weak and susceptible to interference.

In response to the above problems, no effective solution has been proposed yet.

Summary of the invention

The embodiment of the present application provides a detector for detecting a physiological tissue state and a detection method thereof, so as to at least solve the detection signal detected by the detection method of detecting the motion of the physiological tissue by using the Doppler effect in the prior art is very weak. And it is susceptible to interference, resulting in inaccurate detection results.

According to an aspect of an embodiment of the present application, there is provided a probe for detecting physiological tissue, comprising: a first electrode and a second electrode, wherein the first electrode and the second electrode constitute a first transceiving electrode a third electrode, wherein the first electrode and the third electrode constitute a second transceiver electrode pair; the first transceiver circuit, the transmitting end of the first transceiver circuit is connected to the first electrode, The receiving end of the first transceiver circuit is connected to the second electrode, and is configured to detect the first electrode and the first electrode when there is a physiological tissue to be detected between the first electrode and the second electrode An electric field between the two electrodes; a second transceiver circuit, a transmitting end of the second transceiver circuit is connected to the first electrode, and a receiving end of the second transceiver circuit is connected to the third electrode for Detecting the first electrode and when there is a physiological tissue to be detected between the first electrode and the third electrode An electric field between the third electrodes, wherein frequencies of signals transmitted by the first transceiver circuit and the second transceiver circuit are different.

Optionally, the first transceiver circuit includes a transmitting end and a receiving end, the transmitting end includes: a signal source; a first high pass filter, one end is connected to the signal source, and the other end is connected to the first electrode Connected, the receiving end comprises: a second high-pass filter, one end is connected to the second electrode, the other end is connected to the signal processing unit; and the signal processing unit is connected to the second high-pass filter.

Optionally, the second transceiver circuit includes a transmitting end and a receiving end, the transmitting end includes: a signal source; a first low pass filter, one end is connected to the signal source, and the other end is connected to the first electrode Connected, the receiving end includes: a second low pass filter, one end is connected to the third electrode, the other end is connected to the signal processing unit; and the signal processing unit is connected to the second low pass filter .

Optionally, the first electrode, the second electrode, and the third electrode are all plate electrodes.

Optionally, a metal or non-metal structure is fixedly connected between the first electrode and the second electrode for adjusting an electric field distribution between the first electrode and the second electrode, A metal or non-metal structure is fixedly coupled between the first electrode and the third electrode for adjusting an electric field distribution between the first electrode and the third electrode.

Optionally, a spacing between the first electrode and the second electrode is adjustable, and a spacing between the first electrode and the third electrode is adjustable.

According to still another aspect of embodiments of the present application, there is also provided a probe for detecting physiological tissue, comprising: a first electrode and a second electrode, wherein the first electrode and the second electrode constitute a first And a third electrode and a fourth electrode, wherein the third electrode and the fourth electrode constitute a second transceiver electrode pair; the first transceiver circuit, the transmitting end of the first transceiver circuit and the first An electrode is connected, and a receiving end of the first transceiver circuit is connected to the second electrode, and is configured to detect when the physiological tissue to be detected exists between the first electrode and the second electrode An electric field between an electrode and the second electrode; a second transceiver circuit, a transmitting end of the second transceiver circuit is connected to the fourth electrode, and a receiving end and a third electrode of the second transceiver circuit Connected to detect an electric field between the third electrode and the fourth electrode when there is a physiological tissue to be detected between the third electrode and the fourth electrode, wherein the first transceiver circuit And the second transceiver circuit Signals of different frequencies emitted.

Optionally, the second transceiver circuit includes a transmitting end and a receiving end, the transmitting end includes: a signal source; a first low pass filter, one end is connected to the signal source, and the other end is connected to the fourth electrode Connected, the receiving end includes: a second low pass filter, one end is connected to the third electrode, the other end is connected to the signal processing unit; and the signal processing unit is connected to the second low pass filter .

Optionally, the first electrode, the second electrode, the third electrode, and the fourth electrode are all plate electrodes.

Optionally, a metal or non-metal structure is fixedly connected between the first electrode and the second electrode for adjusting an electric field distribution between the first electrode and the second electrode, A metal or non-metal structure is fixedly coupled between the third electrode and the fourth electrode for adjusting an electric field distribution between the third electrode and the fourth electrode.

Optionally, a spacing between the first electrode and the second electrode is adjustable, and a spacing between the third electrode and the fourth electrode is adjustable.

According to still another aspect of the embodiments of the present application, a method for detecting a detector includes: acquiring a first electric field parameter and a second electric field parameter, wherein the first electric field parameter is at the first transceiving electrode The electric field parameter between the pair of first transceiving electrodes when there is a physiological tissue to be detected between the pair, the second electric field parameter is the second transceiving when there is a physiological tissue to be detected between the pair of second transceiving electrodes An electric field parameter between the pair of electrodes; comparing an electric field parameter between the pair of first transceiving electrodes and an electric field parameter between the pair of second transceiving electrodes, according to an electric field parameter and a relationship between the pair of first transceiving electrodes The change value of the electric field parameter between the pair of second transceiving electrodes determines the motion state of the physiological tissue to be detected.

Optionally, before acquiring the first electric field parameter and the second electric field parameter, the method further includes: determining the detected intensity of the electrical signal between the first pair of transmitting and receiving electrodes and the second transmitting and receiving electrode pair Whether the strength of the electrical signal is within a preset intensity range; if the strength of the electrical signal between the first pair of transceiver electrodes or the strength of the electrical signal between the second pair of transceiver electrodes is at the preset Outside the intensity range, the intensity of the electric field between the first pair of transceiver electrodes and the second pair of transceiver electrodes is adjusted.

The time of the physiological tissue to be detected flowing through the first transceiver electrode pair can be determined according to the change value of the electric field parameter between the first transceiver electrode pair, and the value of the electric field parameter between the second transceiver electrode pair can be determined to be detected. The time when the physiological tissue flows through the second pair of transmitting and receiving electrodes is calculated according to the time difference between the two electrode pairs to be detected and the distance between the two electrode pairs, and the flow velocity of the physiological tissue to be detected is calculated, thereby improving the detection physiology. The technical effect of the accuracy of the motion of the tissue, thereby solving the detection method of detecting the motion of the physiological tissue by using the Doppler effect in the prior art, the signal detected is very weak, and is susceptible to interference, resulting in inaccurate detection results. technical problem.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the present application, and are intended to be a part of this application. In the drawing:

1-1 is a schematic illustration of an optional detector for detecting physiological tissue in accordance with an embodiment of the present application;

1-2 are schematic illustrations of another alternative detector for detecting physiological tissue in accordance with an embodiment of the present application;

2 is a schematic diagram of transient electric field distribution of two electrodes under certain operating conditions according to an embodiment of the present application;

3 is a schematic illustration of another alternative detector in accordance with an embodiment of the present application;

4 is a simulated circuit diagram of a detector in accordance with an embodiment of the present application;

FIG. 5 is a schematic diagram of crosstalk intensity according to an embodiment of the present application; FIG.

6 is a schematic diagram of a first electrode and a second electrode being plate electrodes according to an embodiment of the present application;

7 is a schematic diagram of a first electrode being an electrode having a pulse wave shape and a second electrode being a plate electrode according to an embodiment of the present application;

8 is a schematic view of an electrode having a folded structure, in which both the first electrode and the second electrode are according to an embodiment of the present application;

9 is a schematic view of a first electrode and a second electrode each having a circular arc-shaped electrode according to an embodiment of the present application;

10 is a schematic diagram of a structure for adjusting an electric field distribution between a first electrode and a second electrode according to an embodiment of the present application;

11 is a schematic view showing an adjustable relative position between a first electrode and a second electrode according to an embodiment of the present application;

12 is a schematic diagram of adjusting a spacing between a first electrode and a second electrode using a switch according to an embodiment of the present application;

13 is a flow chart of a method of detecting a detector in accordance with an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. It is an embodiment of the present application, and not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts should belong to The scope of protection of this application.

It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

First, the technical terms involved in the embodiments of the present application are explained as follows:

Pulse wave: The pulse wave is formed by the heart's pulsation (vibration) propagating along the arterial blood vessels and blood flow to the periphery. Therefore, the speed of propagation depends on the physical and geometric properties of the propagation medium, for example, the elasticity of the artery, the size of the lumen, The density and viscosity of the blood, etc., are particularly closely related to the elasticity, caliber and thickness of the arterial wall.

Example 1

At least two detectors for detecting physiological tissue are provided in the embodiment of the present application, one of which is a single-shot and double-receiving detector having one transmitting end and two receiving ends; the other is a double-transmitting and double-receiving structure. The detector has two transmitters and two receivers.

The first type: the detector of single-shot and double-receiving structure.

As shown in FIG. 1-1, the detector includes a first electrode 11, a second electrode 12, a third electrode 13, a first transceiver circuit 15, and a second transceiver circuit 16.

The first electrode 11 and the second electrode 12 constitute a first transceiving electrode pair. The first electrode 11 and the third electrode 13 constitute a second transceiving electrode pair. The transmitting end of the first transceiver circuit 15 is connected to the first electrode, and the receiving end of the first transceiver circuit is connected to the second electrode for detecting the presence of the physiological tissue to be detected between the first electrode and the second electrode. An electric field between an electrode and a second electrode. The transmitting end of the second transceiver circuit 16 is connected to the first electrode, and the receiving end of the second transceiver circuit is connected to the third electrode for detecting the physiological tissue to be detected between the first electrode and the third electrode. An electric field between an electrode and a third electrode. The frequencies of the signals transmitted by the first transceiver circuit and the second transceiver circuit are different.

The second type: detector with double-shot and double-receiving structure.

As shown in FIG. 1-2, the detector includes a first electrode 21, a second electrode 22, a third electrode 23, a fourth electrode 24, a first transceiver circuit 25, and a second transceiver circuit 26.

The first electrode 21 and the second electrode 22 constitute a first transceiving electrode pair. The third electrode 23 and the fourth electrode 24 constitute a second transceiving electrode pair. The transmitting end of the first transceiver circuit 25 is connected to the first electrode, and the receiving end of the first transceiver circuit is connected to the second electrode for detecting the physiological tissue to be detected between the first electrode and the second electrode. An electric field between an electrode and a second electrode. The transmitting end of the second transceiver circuit 26 is connected to the fourth electrode, and the receiving end of the second transceiver circuit is connected to the third electrode for detecting the physiological tissue to be detected between the third electrode and the fourth electrode. An electric field between the three electrodes and the fourth electrode. The frequencies of the signals transmitted by the first transceiver circuit and the second transceiver circuit are different.

Generally, the capacitor is formed by sandwiching an insulating dielectric between the two metal electrodes. In the embodiment of the present application, the conductor electrode may be embedded in the dielectric plate (for example, a rubber plate or a plastic plate) to form an electrode pair. At this time, the dielectric plate is an insulating dielectric. It is also possible to place the conductor electrode in the air, in which case the air is an insulating dielectric.

The transceiver circuit can be used to detect the distribution of the electric field, the electric field strength, the phase of the electric field, and the like. The physiological tissue to be detected may be heart, blood, and the like. The detector provided in the embodiment of the present application can detect the beat frequency of the heart, the flow speed of the blood, and the like.

According to the principle of the capacitor, an electric field is formed between the electrodes in the operating state. According to an embodiment of the present application, the transient electric field distribution formed by two identical plate electrodes under certain operating conditions is as shown in FIG. 2, and this electric field distribution is similar to the electric field distribution of a typical capacitor. Since the electric field distribution can be adjusted by changing the transmission signal of the transmitting end of the transceiver circuit, the electric field distribution of the detector is not limited to such an electric field distribution as shown in FIG.

When there is a physiological tissue to be detected between the two electrodes, the dielectric constant of the space in which the physiological tissue is to be detected changes, thereby causing a change in electric field parameters (for example, spatial distribution of electric field, electric field strength, and electric field phase). .

The time of the physiological tissue to be detected flowing through the first transceiver electrode pair can be determined according to the change value of the electric field parameter between the first transceiver electrode pair, and the value of the electric field parameter between the second transceiver electrode pair can be determined to be detected. The time when the physiological tissue flows through the second pair of transmitting and receiving electrodes, according to the time difference of the physiological tissue to be detected flowing through the two electrode pairs and the distance between the two electrode pairs, the flow velocity of the physiological tissue to be detected is calculated, and the prior art is solved. The technique of detecting the motion of the physiological tissue by using the Doppler effect is very weak, and is susceptible to interference, resulting in inaccurate detection results, and realizing the technique for improving the accuracy of detecting the motion of the physiological tissue. effect.

The signal in the first transceiver circuit can be received by the second transceiver circuit to form interference with the received signal of the second transceiver circuit; the signal in the second transceiver circuit can be received by the first transceiver circuit to form a first transceiver The circuit receives interference from the signal, that is, there is crosstalk between the two signals.

The crosstalk of the two signals is sometimes serious. When the frequencies of the signals transmitted by the first transceiver circuit and the second transceiver circuit are the same, the signals of the two channels cannot be separated in the first transceiver circuit and in the second transceiver circuit. Since the signal carries information of the change of the electric field, in the process of determining the motion state of the physiological tissue to be detected according to the change of the signal, mutual interference of the two signals may cause a large error in detecting the motion of the physiological tissue.

In the embodiment of the present application, the frequencies of the signals transmitted by the first transceiver circuit and the second transceiver circuit are different, and it is relatively easy to separate the signals of the two channels in the first transceiver circuit and in the second transceiver circuit, for example, The filter can be used to realize the separation of signals of different frequencies, so that in the process of determining the motion state of the physiological tissue to be detected according to the change of the signal, the error caused by the crosstalk is avoided, and the obtained result is more accurate.

For example, using the detector provided in the embodiment of the present application to detect the pulse wave velocity PWV, the first transceiver electrode is placed on the elbow of the patient, and the second transceiver electrode is placed on the wrist of the patient, when the heart is once When the pulsation causes the pulse wave to reach the elbow of the patient, the first transceiver circuit detects the change of the electric field between the pair of first transceiver electrodes, and records the time t1, when the same beat of the heart causes the pulse wave to reach the wrist of the patient, The second transceiver circuit detects a change in the electric field between the pair of second transceiver electrodes and records the time t2. Assuming that the distance between the elbow and the wrist of the patient is d, the speed of blood flow of the patient can be calculated according to d, t1, and t2, and the speed of the pulse wave of the patient is the pulse wave velocity PWV, PWV=d/(t2 -t1).

3 is a schematic diagram of another optional detector according to an embodiment of the present application. As shown in FIG. 3, the detector includes a UWB1 signal source 31, a first high pass filter 33, and a first transmit antenna 35 (ie, the above a first electrode), a first receiving antenna 37 (ie, the second electrode), a second high-pass filter 38, a first processor 39, a first low-pass filter 43, and a second transmitting antenna 45 (ie, the fourth electrode And a second receiving antenna 47 (ie, the third electrode), a second low pass filter 48, and a second processor 49. Alternatively, the first high pass filter 33 and the second high pass filter 38 may be identical filters, such as high pass filters of 550M. Alternatively, the first low pass filter 43 and the second low pass filter 48 may be identical filters, such as low pass filters of 500M.

The signal transmitted by the UWB1 signal source 31 is divided into two paths. The first path signal passes through the first high pass filter 33, the first transmit antenna 35, and the second path signal passes through the first low pass filter 43, the second transmit antenna 45.

The first signal passes through the first high pass filter 33 to filter out the low frequency signal, leaving only the high frequency signal, and the high frequency signal generates an electric field between the first transmitting antenna and the first receiving antenna. The second signal passes through the first low pass filter 43 and filters out the high frequency signal, leaving only the low frequency signal, and the low frequency signal generates an electric field between the second transmitting antenna and the second receiving antenna.

The first receiving antenna receives the first path signal and also receives a part of the second path signal. For the first receiving antenna, the received second path signal is noise. By passing the signal received by the first receiving antenna through the second high pass filter 38, the low frequency signal is filtered out, leaving only the high frequency signal. High frequency signal through the first processor 39 Processing is performed to obtain a first electric field parameter.

The second receiving antenna receives the second signal and also receives a part of the first signal. For the second receiving antenna, the received first signal is noise. By receiving the signal from the second receiving antenna through the second low pass filter 48, the high frequency signal is filtered out, leaving only the low frequency signal. The low frequency signal is processed by the second processor 49 to obtain a second electric field parameter.

The filter is used to realize the separation of signals of different frequencies, so that in the process of determining the motion state of the physiological tissue to be detected according to the change of the signal, the error caused by the crosstalk is avoided, and the accuracy of detecting the motion of the physiological tissue is improved. .

4 is a simulated circuit diagram of a detector in accordance with an embodiment of the present application. As shown in FIG. 4, port 3 is the transmitting end of the first transceiver circuit, port 1 is the receiving end of the first transceiver circuit, port 4 is the transmitting end of the second transceiver circuit, and port 2 is the receiving end of the second transceiver circuit. The middle box is used to indicate the S parameters of the antenna system.

FIG. 5 is a schematic diagram of crosstalk strength according to an embodiment of the present application. In FIG. 5, S(4, 2) represents the S parameter of the second transmission, the second reception (port 4 transmission shown in FIG. 4, port 2 reception), and S(4, 2) is at 200 MHz-500 MHz. The minimum value of the operating band is approximately -19 dB. S(3,2) indicates the size of the first transmission crosstalk to the second reception (port 3 transmission, port 2 reception shown in Figure 4), and the maximum S(3, 2) in the 550MHz-800MHz operating frequency band. The value is about -44dB. Using the detector provided by the embodiment of the present application, the crosstalk is approximately: (-19 dB) - (-44 dB) = 25 dB. If the high-pass filter and low-pass filter are not added, the crosstalk is about 3dB. Therefore, by using the detector provided by the embodiment of the present application, the intensity of crosstalk can be reduced by about 22 dB, thereby effectively reducing crosstalk between the two paths.

In order to obtain a specified electric field distribution form in actual use, and in order to match the impedance of the transceiver circuit, the conductor electrode can be designed in any shape as needed, as described in detail below.

For simplicity of description, in the embodiment of the present application, only the first transmitting and receiving electrode pairs composed of the first electrode and the second electrode will be described and illustrated in detail. The shape and size of the second transceiving electrode pair may be the same as the first transceiving electrode pair, or may be different from the first transceiving electrode pair.

Optionally, the first transceiving electrode pair and the plurality of electrodes constituting the second transceiving electrode pair are formed (the single-shot and double-receiving structures are the first electrode, the second electrode, and the third electrode; the dual-issue and double-receiving structure is the first electrode, The shapes of the second electrode, the third electrode, and the fourth electrode may be completely the same, for example, they are all flat, or both are filamentary (or linear), and the shapes may be different.

For example, as shown in FIG. 6, the first electrode (electrode 1) and the second electrode (electrode 2) are all identical plate electrodes. The electrode 1 and the electrode 2 are respectively connected to the transmitting end and the receiving end of the first transceiver circuit.

Further, for example, as shown in FIG. 7, the first electrode (electrode 1) is an electrode having a pulse wave shape, and the second electrode (electrode 2) is a plate electrode. The electrode 1 and the electrode 2 are respectively connected to the transmitting end and the receiving end of the first transceiver circuit.

Alternatively, the plurality of electrodes constituting the first transceiving electrode pair and the pair of second transceiving electrode pairs may be electrodes having a folded structure for changing the impedance of the electrodes so that the impedance of the electrodes constituting the first transceiving electrode pair Matching the impedance of the first transceiver circuit, the impedance of the electrode constituting the second transceiver electrode pair matches the impedance of the second transceiver circuit.

As shown in FIG. 8, the electrode having the folded structure forms a large electric field range, so that the detection range is increased, thereby facilitating the detection of the physiological tissue.

Optionally, the first electrode comprises a first flat plate portion and a first additional portion, wherein the first additional portion is a circular arc shaped electrode having a first predetermined curvature, and the second electrode comprises a second flat plate portion and a second additional portion Wherein the second additional portion is an arcuate electrode having a second predetermined curvature; the third electrode comprises a third flat portion and a third additional portion, wherein the third additional portion is an arc having a third predetermined curvature And a fourth electrode comprising a fourth flat plate portion and a fourth additional portion, wherein the fourth additional portion is an arcuate electrode having a fourth predetermined curvature.

The first preset curvature, the second preset curvature, the third preset curvature, and the fourth preset curvature may or may not be equal.

The circular arc electrode enables a wider range of electric fields to be formed between the two electrodes, so that the above detector has a larger detection range.

As shown in FIG. 9, the electrode 1 is used to indicate the first electrode, the electrode 2 is used to represent the second electrode, the electrode 1 includes the first plate portion 102 and the first additional portion 104, and the electrode 2 includes the second plate portion 202 and the second additional portion. 204. The first additional portion 104 and the second additional portion 204 are both arcuate electrodes.

Optionally, a metal or non-metal structure is fixedly connected between the two electrodes constituting the first transceiver electrode pair for adjusting the electric field distribution between the first transceiver electrode pair, and two of the second transceiver electrode pairs are formed. A metal or non-metal structure is fixedly connected between the electrodes for adjusting the electric field distribution between the second pair of transmitting and receiving electrodes. To achieve detection of certain locations, a metal or non-metal structure can be added around the two electrodes to adjust the electric field distribution of the open capacitor.

As shown in FIG. 10, a structure for adjusting an electric field distribution between the first electrode (electrode 1) and the second electrode (electrode 2) may be a metal or a non-metal, and the structure may be grounded or ungrounded. As an alternative embodiment, the electrode 1 and the electrode 2 can be embedded in the dielectric plate, and a metal or non-metal structure for adjusting the electric field distribution is also embedded in the dielectric plate.

Alternatively, the spacing between the two electrodes of the first transceiving electrode pair and the spacing between the two electrodes of the second transceiving electrode pair are both adjustable.

As shown in FIG. 11, the relative position (i.e., the pitch) between the first electrode (electrode 1) and the second electrode (electrode 2) is adjustable. By adjusting the relative positions of the two electrodes, the distribution of the electric field between the two electrodes can be changed, thereby obtaining more abundant detection information.

As an alternative embodiment, a switch can be used to adjust the spacing between the two electrodes. As shown in FIG. 12, when the switch is connected to the electrode 1 and the electrode 3, the electrode 1 and the electrode 3 serve as working electrodes, and the electrode 2 is in an idle state, and the distance between the two working electrodes is large. When the switching switch is connected to the electrode 2 and the electrode 3, the electrode 2 and the electrode 3 serve as working electrodes, the electrode 1 is in an idle state, and the spacing between the two working electrodes is small.

Example 2

In accordance with an embodiment of the present application, an embodiment of a method of detecting a detector is provided, it being noted that the steps illustrated in the flowchart of the figures may be performed in a computer system such as a set of computer executable instructions, and Although the logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

According to an embodiment of the present application, a method for detecting a detector is also provided. The detection method of the detector can be performed by the above detector.

13 is a flow chart of a method of detecting a detector in accordance with an embodiment of the present application. As shown in FIG. 13, the method includes the following steps:

Step S1302: Obtain a first electric field parameter and a second electric field parameter, wherein the first electric field parameter is an electric field parameter between the first transceiving electrode pair when the physiological tissue to be detected exists between the first transceiving electrode pair, and the second electric field parameter The electric field parameter between the pair of second transceiving electrodes when there is a physiological tissue to be detected between the second transceiving electrode pair.

Step S1304: Comparing the electric field parameter between the first pair of transmitting and receiving electrodes and the electric field parameter between the second pair of transmitting and receiving electrodes, according to the electric field parameter between the pair of first transmitting and receiving electrodes and the electric field parameter between the pair of second transmitting and receiving electrodes The value determines the state of motion of the physiological tissue to be detected.

The time of the physiological tissue to be detected flowing through the first transceiver electrode pair can be determined according to the change value of the electric field parameter between the first transceiver electrode pair, and the value of the electric field parameter between the second transceiver electrode pair can be determined to be detected. The time when the physiological tissue flows through the second pair of transmitting and receiving electrodes is calculated according to the time difference between the two electrode pairs to be detected and the distance between the two electrode pairs, and the flow velocity or fluctuation speed of the physiological tissue to be detected is calculated, and the solution is solved. In the prior art, the detection signal detected by the Doppler effect detecting the motion of the physiological tissue is very weak, and is susceptible to interference, thereby causing inaccurate detection results, and improving the detection physiology. The technical effect of the accuracy of the organization's movements.

Optionally, before acquiring the first electric field parameter and the second electric field parameter, the method further includes: determining the intensity of the detected electrical signal between the first pair of transceiver electrodes and the strength of the electrical signal between the second pair of transceiver electrodes Whether they are all within a preset intensity range; if the strength of the electrical signal between the first pair of transceiver electrodes or the intensity of the electrical signal between the second pair of transceiver electrodes is outside the preset intensity range, adjusting the first transceiver electrode pair And the strength of the electric field between the second pair of transceiver electrodes.

When the intensity of the electrical signal between the transmitting electrode and the receiving electrode is weak, the signal is not easily detected, and even if the signal is detected, it is easily affected by noise, which is disadvantageous for subsequent extraction and denoising of the signal. When the intensity of the electrical signal between the transmitting electrode and the receiving electrode is strong, it may cause discomfort to the human body. The preset intensity range is a preset intensity range. When the intensity of the electrical signal between the transmitting electrode and the receiving electrode is within a preset intensity range, the signal intensity is strong, easy to detect, and within the human body's tolerable range. Will not cause discomfort to the human body.

In the above-mentioned embodiments of the present application, the descriptions of the various embodiments are different, and the parts that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

In the several embodiments provided by the present application, it should be understood that the disclosed technical contents may be implemented in other manners. The device embodiments described above are only schematic. For example, the division of the unit may be a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, unit or module, and may be electrical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. , including a number of instructions to make one The computer device (which may be a personal computer, server or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and the like. .

The above description is only a preferred embodiment of the present application, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present application. It should be considered as the scope of protection of this application.

Claims

A detector for detecting physiological tissue states, comprising:

a first electrode and a second electrode, wherein the first electrode and the second electrode constitute a first pair of transceiver electrodes;

a third electrode, wherein the first electrode and the third electrode constitute a second transceiver electrode pair;

a first transceiver circuit, a transmitting end of the first transceiver circuit is connected to the first electrode, and a receiving end of the first transceiver circuit is connected to the second electrode, and is configured to be at the first electrode and Detecting an electric field between the first electrode and the second electrode when there is a physiological tissue to be detected between the second electrodes;

a second transceiver circuit, a transmitting end of the second transceiver circuit is connected to the first electrode, and a receiving end of the second transceiver circuit is connected to the third electrode, and is used in the first electrode and Detecting an electric field between the first electrode and the third electrode when there is a physiological tissue to be detected between the third electrodes,

The frequencies of the signals transmitted by the first transceiver circuit and the second transceiver circuit are different.
The detector of claim 1 wherein said first transceiver circuit comprises a transmitting end and a receiving end,

The transmitting end includes:

signal source;

a first high pass filter having one end connected to the signal source and the other end connected to the first electrode

The receiving end includes:

a second high pass filter having one end connected to the second electrode and the other end connected to the signal processing unit;

A signal processing unit is coupled to the second high pass filter.
The detector of claim 1 wherein said second transceiver circuit comprises a transmitting end and a receiving end,

The transmitting end includes:

signal source;

a first low pass filter having one end connected to the signal source and the other end connected to the first electrode

The receiving end includes:

a second low pass filter having one end connected to the third electrode and the other end connected to the signal processing unit;

A signal processing unit is coupled to the second low pass filter.
The probe according to claim 1, wherein the first electrode, the second electrode, and the third electrode are all plate electrodes.
The detector according to claim 1, wherein a metal or non-metal structure is fixedly coupled between the first electrode and the second electrode for adjusting the first electrode and the second electrode The electric field distribution between the first electrode and the third electrode is fixedly connected with a metal or non-metal structure for adjusting the electric field distribution between the first electrode and the third electrode.
The detector according to claim 1, wherein a spacing between the first electrode and the second electrode is adjustable, and a spacing between the first electrode and the third electrode is adjustable.
A detector for detecting physiological tissue, comprising:

a first electrode and a second electrode, wherein the first electrode and the second electrode constitute a first pair of transceiver electrodes;

a third electrode and a fourth electrode, wherein the third electrode and the fourth electrode constitute a second pair of transceiver electrodes;

a first transceiver circuit, a transmitting end of the first transceiver circuit is connected to the first electrode, and a receiving end of the first transceiver circuit is connected to the second electrode, and is configured to be at the first electrode and Detecting an electric field between the first electrode and the second electrode when there is a physiological tissue to be detected between the second electrodes;

a second transceiver circuit, a transmitting end of the second transceiver circuit is connected to the fourth electrode, and a receiving end of the second transceiver circuit is connected to the third electrode, and is used in the third electrode and Detecting an electric field between the third electrode and the fourth electrode when there is a physiological tissue to be detected between the fourth electrodes,

The frequencies of the signals transmitted by the first transceiver circuit and the second transceiver circuit are different.
The detector according to claim 7, wherein said first transceiver circuit comprises a transmitting end and a receiving end,

The transmitting end includes:

signal source;

a first high pass filter having one end connected to the signal source and the other end connected to the first electrode

The receiving end includes:

a second high pass filter having one end connected to the second electrode and the other end connected to the signal processing unit;

A signal processing unit is coupled to the second high pass filter.
The detector according to claim 7, wherein said second transceiver circuit comprises a transmitting end and a receiving end,

The transmitting end includes:

signal source;

a first low pass filter having one end connected to the signal source and the other end connected to the fourth electrode

The receiving end includes:

a second low pass filter having one end connected to the third electrode and the other end connected to the signal processing unit;

A signal processing unit is coupled to the second low pass filter.
The detector according to claim 7, wherein the first electrode, the second electrode, the third electrode, and the fourth electrode are all plate electrodes.
The detector according to claim 7, wherein a metal or non-metal structure is fixedly coupled between the first electrode and the second electrode for adjusting the first electrode and the second electrode The electric field distribution between the third electrode and the fourth electrode is fixedly connected with a metal or non-metal structure for adjusting the electric field distribution between the third electrode and the fourth electrode.
The detector according to claim 7, wherein a spacing between the first electrode and the second electrode is adjustable, and a spacing between the third electrode and the fourth electrode is adjustable.
A method of detecting a detector according to any one of claims 1 to 12, comprising:

Obtaining a first electric field parameter and a second electric field parameter, wherein the first electric field parameter is an electric field parameter between the first transceiving electrode pair when there is a physiological tissue to be detected between the first transceiving electrode pair, The second electric field parameter is an electric field parameter between the pair of second transceiving electrodes when there is a physiological tissue to be detected between the pair of second transceiving electrodes;

Comparing an electric field parameter between the pair of first transceiving electrodes and an electric field parameter between the pair of second transceiving electrodes, according to an electric field parameter between the pair of first transceiving electrodes and between the pair of second transceiving electrodes The change value of the electric field parameter determines the motion state of the physiological tissue to be detected.
The method of claim 13 wherein prior to obtaining the first electric field parameter and the second electric field parameter, The method further includes:

Determining whether the detected intensity of the electrical signal between the first pair of transceiver electrodes and the strength of the electrical signal between the pair of second transceiver electrodes are within a preset intensity range;

Adjusting the first transceiver electrode pair and if the strength of the electrical signal between the first transceiver electrode pair or the strength of the electrical signal between the second transceiver electrode pair is outside the preset intensity range The intensity of the electric field between the pair of second transceiving electrodes.