WO2021213150A1 - 弱电信号采集电路及具有该采集电路的座圈及马桶盖 - Google Patents

弱电信号采集电路及具有该采集电路的座圈及马桶盖 Download PDF

Info

Publication number
WO2021213150A1
WO2021213150A1 PCT/CN2021/083998 CN2021083998W WO2021213150A1 WO 2021213150 A1 WO2021213150 A1 WO 2021213150A1 CN 2021083998 W CN2021083998 W CN 2021083998W WO 2021213150 A1 WO2021213150 A1 WO 2021213150A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal acquisition
seat ring
operational amplifier
signal
circuit
Prior art date
Application number
PCT/CN2021/083998
Other languages
English (en)
French (fr)
Inventor
王沛
罗金和
Original Assignee
广州易风健康科技股份有限公司
广州芯相随科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 广州易风健康科技股份有限公司, 广州芯相随科技有限公司 filed Critical 广州易风健康科技股份有限公司
Priority to US17/920,380 priority Critical patent/US20230157611A1/en
Publication of WO2021213150A1 publication Critical patent/WO2021213150A1/zh

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/30—Input circuits therefor
    • A61B5/305—Common mode rejection
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K13/00—Seats or covers for all kinds of closets
    • A47K13/24—Parts or details not covered in, or of interest apart from, groups A47K13/02 - A47K13/22, e.g. devices imparting a swinging or vibrating motion to the seats
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/26—Bioelectric electrodes therefor maintaining contact between the body and the electrodes by the action of the subjects, e.g. by placing the body on the electrodes or by grasping the electrodes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
    • A61B5/282—Holders for multiple electrodes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/30—Input circuits therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/30—Input circuits therefor
    • A61B5/307—Input circuits therefor specially adapted for particular uses
    • A61B5/308—Input circuits therefor specially adapted for particular uses for electrocardiography [ECG]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
    • A61B5/6891—Furniture
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation

Definitions

  • the invention relates to the technical field of toilet covers, in particular to a weak current signal acquisition circuit, a seat ring and a toilet cover with a weak current signal acquisition circuit.
  • the toilet also known as the toilet, is an indispensable appliance in people's daily life.
  • the toilet cover with medical and health care functions is more popular.
  • the smart toilet cover can collect the biological characteristic signals of the human body, such as ECG signal, human electrical impedance, etc., to achieve the purpose of monitoring human health.
  • ECG signal ECG signal
  • human electrical impedance etc.
  • the resistance value of the skin surface of the thigh is very high, causing It is extremely difficult to collect ECG signals through the thigh, and the collected ECG signals are weak, which affects the subsequent processing of the ECG signals.
  • a weak current signal acquisition circuit includes two signal acquisition units, the two signal acquisition units include two signal receiving electrode plates and two operational amplifiers, the two operational amplifiers form a differential circuit, and the differential circuit further includes A first feedback resistor R 3 , a second feedback resistor R 3 ′, and a negative feedback resistor R 4 provided between the first feedback resistor R 3 and the second feedback resistor R 3 ′; the negative feedback resistor R 4 is a negative feedback circuit, the negative feedback circuit is used to filter the differential mode signal received by the signal receiving electrode sheet.
  • the two signal receiving electrode plates include a first signal receiving electrode plate and a second signal receiving electrode plate
  • the two operational amplifiers include a first operational amplifier A and a second operational amplifier A'.
  • the signal acquisition unit includes a first signal acquisition unit and a second signal acquisition unit;
  • the first signal receiving electrode piece and the first operational amplifier A form the first signal acquisition unit, and the first signal receiving electrode piece is connected to the same direction input terminal of the first operational amplifier A, and the The first feedback resistor R 3 is arranged between the inverting input terminal and the output terminal of the first operational amplifier A;
  • the second signal receiving electrode strip and the second operational amplifier A' constitute the second signal acquisition unit, and the second signal receiving electrode strip is connected to the non-inverting input terminal of the second operational amplifier A', so
  • the second feedback resistor R 3 ′ is arranged between the inverting input terminal and the output terminal of the second operational amplifier A′.
  • the two signal receiving electrode plates are active electrode plates, and the two signal receiving electrode plates are used for receiving common mode signals and differential mode signals.
  • the negative feedback circuit is composed of a single resistor or a network component with frequency characteristics composed of multiple electronic components; or, the negative feedback circuit is composed of a frequency characteristic with all-pass, low-pass, high-pass, band-pass, or band-stop frequency characteristics.
  • the composition of the network components is composed of a single resistor or a network component with frequency characteristics composed of multiple electronic components; or, the negative feedback circuit is composed of a frequency characteristic with all-pass, low-pass, high-pass, band-pass, or band-stop frequency characteristics.
  • the seat ring is installed with the weak current signal acquisition circuit as described above.
  • a mounting hole is respectively provided at the near top end of the upper surface on the left and right sides of the seat ring, each of the mounting holes is provided with a signal acquisition unit, and the signal receiving electrode sheet is arranged on the cover.
  • the first operational amplifier A and the second operational amplifier A' are respectively installed in the two mounting holes.
  • a wire through hole is respectively provided in the left and right sides of the seat ring, one end of the two wire through holes is respectively provided at the bottom of the mounting hole, and the other end of the two wire through holes Are respectively arranged at the connection between the seat ring and the seat cover;
  • a signal transmission line is respectively provided in the two wire through holes, and one ends of the two signal transmission lines are respectively connected to the output ends of the first operational amplifier A and the second operational amplifier A', and two The other ends of the signal transmission lines are respectively connected to the secondary differential amplifier circuit.
  • the signal transmission line adopts a shielded cable.
  • a toilet cover with a weak current signal collection circuit comprising a seat ring with the weak current signal collection circuit as described above installed, the seat ring further comprising a seat ring adjustment mechanism, the seat ring adjustment mechanism is provided in the On the bottom surface of the seat ring, the seat ring adjusting mechanism is used to raise the front end of the seat ring to a certain angle.
  • the signal acquisition unit uses the active electrode sheet, the active electrode plate and two negative access to the inverting input terminal of the differential amplifier feedback resistor R 4 interconnected by a not It will amplify the differential gain of the common-mode signal to avoid common-mode saturation in the circuit, and at the same time improve the common-mode rejection ratio of the entire circuit, thereby improving the signal-to-noise ratio of the system.
  • the common mode circuit flowing through the negative feedback resistor R 4 is 0, that is, for the common mode signal, the negative feedback resistor R 4 is equivalent to an open circuit, so the negative feedback resistor R 4
  • the characteristics of is independent of the common mode signal, that is, the negative feedback resistor R 4 can be replaced with a network component with frequency characteristics such as all-pass, low-pass, high-pass, band-pass, or band-stop.
  • the purpose of adding a seat ring adjustment mechanism to the seat ring is to make it possible to adjust the inclination angle of the seat ring, so that the human body and the signal acquisition unit fit more closely, thereby further improving the collected data.
  • the accuracy of the human body's ECG signal is to make it possible to adjust the inclination angle of the seat ring, so that the human body and the signal acquisition unit fit more closely, thereby further improving the collected data.
  • Fig. 1 is a first structural diagram of a weak current signal acquisition circuit according to an embodiment of the present invention.
  • Fig. 3 is a third structural diagram of a weak current signal acquisition circuit according to an embodiment of the present invention.
  • Fig. 4 is a schematic structural diagram of a seat ring of a toilet cover with a weak current signal collecting circuit according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of the first connection method of the signal transmission line in the weak current signal collection circuit of the toilet cover with the weak current signal collection circuit according to the embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a second connection method of the signal transmission line in the weak current signal collection circuit of the toilet cover with the weak current signal collection circuit according to the embodiment of the present invention.
  • Fig. 7 is a schematic structural diagram of a toilet cover and a foot pad with a weak current signal collecting circuit according to an embodiment of the present invention.
  • a weak current signal collection circuit and a seat and toilet cover with a weak current signal collection circuit are taken as examples.
  • the present invention will be described in detail below with reference to specific embodiments and drawings.
  • Figure 1 Please refer to Figure 1, Figure 2 and Figure 3, showing a weak current signal acquisition circuit provided by an embodiment of the present invention, including two signal acquisition units, the two signal acquisition units include two signal receiving electrode plates and two An operational amplifier, the two operational amplifiers form a differential circuit, and the differential circuit further includes a first feedback resistor R 3 , a second feedback resistor R 3 ′, and the first feedback resistor R 3 and the second feedback resistor R 3 ′.
  • the negative feedback resistance R 4 between the resistance R 3 ′.
  • the two signal receiving electrode plates include a first signal receiving electrode plate 111 and a second signal receiving electrode plate 112, and the two operational amplifiers include a first operational amplifier A and a second operational amplifier A'.
  • the signal acquisition unit includes a first signal acquisition unit and a second signal acquisition unit;
  • the first signal receiving electrode sheet 111 and the first operational amplifier A form the first signal acquisition unit, and the first signal receiving electrode sheet 111 is connected to the same direction input terminal of the first operational amplifier A,
  • the first feedback resistor R 3 is arranged between the inverting input terminal and the output terminal of the first operational amplifier A;
  • the second signal receiving electrode strip 112 and the second operational amplifier A' constitute the second signal acquisition unit, and the second signal receiving electrode strip 112 is connected to the non-inverting input terminal of the second operational amplifier A'
  • the second feedback resistor R 3 ′ is arranged between the inverting input terminal and the output terminal of the second operational amplifier A′.
  • the two signal receiving electrode plates are active electrode plates, and the two signal receiving electrode plates are used for receiving common mode signals and differential mode signals.
  • the negative feedback resistor R 4 is a common resistor of the inverting input terminals of the first operational amplifier A and the second operational amplifier A′.
  • the two active electrodes simultaneously input a common mode signal V cm , the potential difference generated at both ends of the negative feedback resistor R 4 is 0, and the common mode signal V cm generates a common mode on the negative feedback resistor R 4
  • the current I cm is 0, and the differential circuit formed by the first operational amplifier A and the second operational amplifier A'has no effect on the common mode signal V cm, that is, the common mode gain is:
  • the two active electrodes input a differential mode signal V d , and the differential mode current flowing through the negative feedback resistor R 4 is:
  • I d (V d+ -V d- )/R 4
  • the differential gain is:
  • the negative feedback resistor R 4 is shared by the inverting input terminals of the first operational amplifier A and the second operational amplifier A', which can increase the differential gain without amplifying the common mode signal and avoid the circuit
  • the common mode saturation occurs, which improves the signal-to-noise ratio of the circuit.
  • the frequency characteristic of the negative feedback resistor R 4 is similar to that of the common mode.
  • signal irrespective of the negative feedback resistor R 4 can use the network component having a frequency characteristic
  • the network component to display a purely resistive common mode signal the network component is a network component having a filtering function of the differential mode signal.
  • the negative feedback circuit is composed of a single resistor or a network component with frequency characteristics composed of multiple electronic components; or, the negative feedback circuit is composed of a frequency characteristic with all-pass, low-pass, high-pass, band-pass, or band-stop frequency characteristics.
  • the composition of the network components is composed of a single resistor or a network component with frequency characteristics composed of multiple electronic components; or, the negative feedback circuit is composed of a frequency characteristic with all-pass, low-pass, high-pass, band-pass, or band-stop frequency characteristics.
  • the two signal acquisition units are used as the front input electrodes of the amplifying circuit, and the in-phase differential input mode is adopted, so that the ratio of the amplitude of the differential mode signal to the common mode signal sent to the subsequent operational amplifier is improved. , To achieve the purpose of improving the signal-to-noise ratio of the weak electrical signal extracted by the signal acquisition unit.
  • FIG. 4 shows a seat ring 10 having a weak current signal acquisition circuit provided by an embodiment of the present invention, and the seat ring 10 is installed with the weak current signal acquisition circuit as described above.
  • a mounting hole 11 is respectively provided at the near top end of the upper surface on the left and right sides of the seat ring 10, each of the mounting holes 11 is provided with a signal acquisition unit, and the signal receiving electrode sheet cover It is arranged at the opening of the mounting hole 11, and the first operational amplifier A and the second operational amplifier A'are installed in the two mounting holes 11, respectively.
  • a wire through hole is respectively provided in the left and right sides of the seat ring 10, and one ends of the two wire through holes are respectively provided at the bottom of the mounting hole 11.
  • the other ends of the two wire through holes are respectively provided at the connection between the seat ring 10 and the seat cover 20, and a signal transmission line is respectively provided in the two wire through holes.
  • One end is respectively connected to the output ends of the first operational amplifier A and the second operational amplifier A′, and the other ends of the two signal transmission lines are respectively connected to the secondary differential amplifier circuit.
  • the signal transmission line adopts a shielded cable.
  • the seat 10 equipped with the weak current signal acquisition circuit in this embodiment can be installed on an ordinary toilet cover without heating and flushing functions, or can be installed on a toilet with heating and flushing functions and human physiological characteristics.
  • Intelligent toilet lid with detection function of parameters such as body fat parameters, weight parameters, ECG signals, etc.).
  • the first operational amplifier A and the second operational amplifier A' are preamplifiers, which are placed in the seat ring 10 for collecting the ECG signal of the human body, and the second-stage operational amplifier A2 Used to amplify the differential signal transmitted by the first operational amplifier A and the second operational amplifier A', separate the two-stage amplifier circuit and connect it with the signal transmission line, and use two resistors R4 for the negative feedback resistor R4 And R4' instead, and are respectively arranged in the signal collection unit on the left and right sides of the seat ring 10.
  • a signal feedback line is provided in each of the wire through holes on the left and right sides of the seat ring 10, and the negative feedback resistors R4 and R4' are connected together by two sections of the shielded cable, namely
  • the negative feedback circuit is composed of negative feedback resistors R4 and R4' and two sections of shielded cables.
  • a signal feedback line is used to connect negative feedback resistors R4 and R4', that is, the negative feedback circuit is composed of negative feedback resistors R4 and R4' and a section of shielded cable.
  • the negative feedback resistors R4 and R4' are connected by one or two sections of shielded cables, so that the reverse input ends of two operational amplifiers with active electrodes that are physically separated by more than 10 cm are connected by shielded cables. , Reduce the interference of external electrical signals to the signal acquisition unit, and improve the accuracy of the system for collecting human body electrocardiographic signals.
  • the weak current signal collection circuit can be applied to any kind of toilet cover, and can collect the ECG signal of the human body's legs when people use the toilet. Even in the dry winter, it can effectively extract the human body's ECG. Signal.
  • the present invention also discloses a toilet cover 100 with a weak current signal acquisition circuit, including a seat ring 10 having a weak current signal acquisition circuit as described above and a foot pad 30.
  • the toilet cover It also includes a seat ring adjustment mechanism.
  • the footrest plate 30 includes a footrest support plate 31 and a folding connection mechanism 32.
  • the folding connection mechanism 32 includes two connection components respectively provided on both sides of the footrest support plate 31. One end is connected to the outside of the seat ring 10, and the other end of the connecting assembly is connected to the foot support plate 31.
  • the seat ring adjustment mechanism is provided on the bottom surface of the seat ring 10. When the height of the footrest support plate 31 increases, the seat ring adjustment mechanism is used to raise the front end of the seat ring 10 A certain angle.
  • the toilet cover 100 in this embodiment includes not only a common toilet cover 100 without heating and flushing functions, but also a smart toilet cover 100 with heating and flushing functions.
  • the connecting assembly includes a multi-section connecting arm, and the multi-section connecting arm is movably connected to extend or fold the connecting arm, so that the foot pad 30 can be foldably received on the toilet seat.
  • the seat ring adjustment mechanism adopts a mechanical linkage device to realize the control of the lifting angle of the seat ring 10 by the pedal support plate 31.
  • the two connecting components adopt a multi-section connecting arm structure, so that the foot pad 30 can be easily extended or stored, and the length of the load-bearing leg 33 can be adjusted to make the foot pad 30
  • the height can be adjusted accordingly, thereby changing the height difference between the foot pad 30 and the seat ring 10, which is convenient for the elderly and children to use.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Pathology (AREA)
  • Biophysics (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Cardiology (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physiology (AREA)
  • Psychiatry (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Toilet Supplies (AREA)

Abstract

一种弱电信号采集电路及具有该电路的座圈（10）及马桶盖（100），弱电信号采集电路使用两个信号采集单元作为放大电路的前置输入电极，采用同相差分输入方式，使得送到后级运算放大器的差模信号与共模信号的幅值之比得到提高，达到提高信号采集单元提取到的弱电信号信噪比的目的。当人们使用安装有弱电信号采集电路的马桶盖（100）时，大腿与设于座圈（10）上的信号采集单元接触，使弱电信号采集电路可以更有效地采集人体的心电信号。

Description

弱电信号采集电路及具有该采集电路的座圈及马桶盖 技术领域
本发明涉及马桶盖技术领域，具体涉及一种弱电信号采集电路及具有弱电信号采集电路的座圈及马桶盖。
背景技术
坐便器又称为马桶，是人们日常生活中必备的器具，具有医疗和保健作用的马桶盖更加受到人们的欢迎。目前，智能马桶盖可以采集人体的生物特征信号，如心电信号、人体电阻抗等，以达到监测人体健康状况的目的，但是在干燥的冬季，大腿部位的皮肤表面的阻值非常高，造成通过大腿部位采集心电信号异常困难，且采集到的心电信号微弱，影响对心电信号的后续处理。
发明内容
有鉴于此，有必要提供一种提高共模抑制比和采集信号信噪比的弱电信号采集电路及具有弱电信号采集电路的马桶盖。
一种弱电信号采集电路，包括两个信号采集单元，两个所述信号采集单元包括两个信号接收电极片和两个运算放大器，两个所述运算放大器形成差分电路，所述差分电路还包括第一反馈电阻R 3、第二反馈电阻R 3'和设于所述第一反馈电阻R 3和所述第二反馈电阻R 3'之间的负反馈电阻R 4；所述负反馈电阻R 4为负反馈电路，所述负反馈电路用于对所述信号接收电极片接收到的差模信号进行滤波处理。
进一步地，两个所述信号接收电极片包括第一信号接收电极片和第二信号接收电极片，两个所述运算放大器包括第一运算放大器A和第二运算放大器A’，两个所述信号采集单元包括第一信号采集单元和第二信号采集单元；
所述第一信号接收电极片和所述第一运算放大器A组成所述第一信号采集单元，所述第一信号接收电极片连接至所述第一运算放大器A的同向输入端，所述第一反馈电阻R 3设于所述第一运算放大器A的反向输入端和输出端之间；
所述第二信号接收电极片和所述第二运算放大器A’组成所述第二信号采集单元，所述第二信号接收电极片连接至所述第二运算放大器A’的同相输入端，所述第二反馈电阻R 3'设于所述第二运算放大器A’的反向输入端和输出端之间。
进一步地，两个所述信号接收电极片为有源电极片，两个所述信号接收电极片用于接收共模信号和差模信号。
进一步地，所述负反馈电路采用单个电阻或多个电子元件组成的具有频率特性的网络组件构成；或者，所述负反馈电路由具有全通、低通、高通、带通或者带阻频率特性的网络组件构成。
以及，一种具有弱电信号采集电路的座圈，所述座圈安装有如上所述的弱电信号采集电路。
进一步地，所述座圈的左右两侧的上表面的近顶端分别设有一个安装孔，每个所 述安装孔内设有一个所述信号采集单元，所述信号接收电极片盖设于所述安装孔的开口处，两个所述安装孔内分别安装有所述第一运算放大器A和所述第二运算放大器A’。
进一步地，所述座圈的左右两侧边内分别设有一个导线通孔，两个所述导线通孔的一端分别设于所述安装孔的底部，两个所述导线通孔的另一端分别设于所述座圈与座盖的连接处；
两个所述导线通孔内分别设有一根信号传送线，两根所述信号传送线的一端分别连接至所述第一运算放大器A和所述第二运算放大器A’的输出端，两个所述信号传送线的另一端分别连接至次级差分放大电路。
进一步地，所述信号传送线采用屏蔽电缆。
以及，一种具有弱电信号采集电路的马桶盖，包括安装有如上所述的具有弱电信号采集电路的座圈，所述座圈还包括座圈调节机构，所述座圈调节机构设于所述座圈的底面，所述座圈调节机构用于使所述座圈的前端提升一定角度。
有益技术效果：
1.本专利文件中，所述信号采集单元采用有源电极片，并将两个所述有源电极片接入通过所述负反馈电阻R 4互连的差分放大器的反向输入端，不会放大共模信号的差分增益，避免电路出现共模饱和，同时提高整个电路的共模抑制比，从而提高系统的信噪比。
2.本专利文件中，流经所述负反馈电阻R 4的共模电路为0，即对于共模信号来说，所述负反馈电阻R 4相当于开路，因此所述负反馈电阻R 4的特性与共模信号无关，即所述负反馈电阻R 4可以使用具有全通、低通、高通、带通或者带阻等频率特性的网络组件替换。
3.本专利文件中，所述座圈增加座圈调节机构的目的是使其可以调节所述座圈的倾斜角度，使人体与所述信号采集单元更加紧密贴合，从而进一步提高采集到的人体的心电信号的准确性。
附图说明
图1是本发明实施例的弱电信号采集电路的结构示意图一。
图2是本发明实施例的弱电信号采集电路的结构示意图二。
图3是本发明实施例的弱电信号采集电路的结构示意图三。
图4是本发明实施例的具有弱电信号采集电路的马桶盖的座圈的结构示意图。
图5是本发明实施例的具有弱电信号采集电路的马桶盖的弱电信号采集电路中信号传送线的第一种连接方法的结构示意图。
图6是本发明实施例的具有弱电信号采集电路的马桶盖的弱电信号采集电路中信号传送线的第二种连接方法的结构示意图。
图7是本发明实施例的具有弱电信号采集电路的马桶盖及脚垫板的结构示意图。
具体实施方式
本实施例以弱电信号采集电路及具有弱电信号采集电路的座圈及马桶盖为例，以下将结合具体实施例和附图对本发明进行详细说明。
实施例1
请参阅图1、图2和图3，示出本发明实施例提供的一种弱电信号采集电路，包括两 个信号采集单元，两个所述信号采集单元包括两个信号接收电极片和两个运算放大器，两个所述运算放大器形成差分电路，所述差分电路还包括第一反馈电阻R 3、第二反馈电阻R 3'和设于所述第一反馈电阻R 3和所述第二反馈电阻R 3'之间的负反馈电阻R 4。
进一步地，两个所述信号接收电极片包括第一信号接收电极片111和第二信号接收电极片112，两个所述运算放大器包括第一运算放大器A和第二运算放大器A’，两个所述信号采集单元包括第一信号采集单元和第二信号采集单元；
所述第一信号接收电极片111和所述第一运算放大器A组成所述第一信号采集单元，所述第一信号接收电极片111连接至所述第一运算放大器A的同向输入端，所述第一反馈电阻R 3设于所述第一运算放大器A的反向输入端和输出端之间；
所述第二信号接收电极片112和所述第二运算放大器A’组成所述第二信号采集单元，所述第二信号接收电极片112连接至所述第二运算放大器A’的同相输入端，所述第二反馈电阻R 3'设于所述第二运算放大器A’的反向输入端和输出端之间。
进一步地，两个所述信号接收电极片为有源电极片，两个所述信号接收电极片用于接收共模信号和差模信号。
具体地，请参阅图1和图2，所述负反馈电阻R 4为所述第一运算放大器A和所述第二运算放大器A’的反相输入端的共用电阻。
两个所述有源电极同时输入共模信号V cm，在所述负反馈电阻R 4两端产生的电位差为0，共模信号V cm在所述负反馈电阻R 4上产生的共模电流I cm为0，由所述第一运算放大器A和所述第二运算放大器A’形成差分电路对共模信号V cm无放大作用，即共模增益为：
G c＝1
两个所述有源电极输入差模信号V d，流过所述负反馈电阻R 4的差模电流为：
I d＝(V d+-V d-)/R 4
差分增益为：
G d＝(2R 3+R 4)/R 4
由上述分析可知，所述第一运算放大器A和所述第二运算放大器A’的反相输入端共用所述负反馈电阻R 4，可以在不放大共模信号的同时提高差分增益，避免电路出现共模饱和，改善电路的信噪比。同时可知电路的共模抑制比为CMRR＝G d/G c＝G d。
具体地，请参阅图3，由于流经所述负反馈电阻R 4的共模电流I cm为0，对于共模信号来说相当于开路，因此所述负反馈电阻R 4的频率特性与共模信号无关，所述负反馈电阻R 4可以使用具有频率特性的网络组件替代，所述网络组件对共模信号显示纯电阻性，所述网络组件为具有对差模信号实现滤波功能的网络组件。
进一步地，所述负反馈电阻R 4为负反馈电路，所述负反馈电路用于对所述信号接收电极片接收到的差模信号进行滤波处理。
进一步地，所述负反馈电路采用单个电阻或多个电子元件组成的具有频率特性的网络组件构成；或者，所述负反馈电路由具有全通、低通、高通、带通或者带阻频率特性的网络组件构成。
在本实施例中，两个所述信号采集单元作为放大电路的前置输入电极，采用同相差分输入方式，使得送到后级运算放大器的差模信号与共模信号的幅值之比得到提高，达到提高所述信号采集单元提取到的弱电信号信噪比的目的。
实施例2
请参阅图4，示出本发明实施例提供的一种具有弱电信号采集电路的座圈10，所述座圈10安装有如上所述的弱电信号采集电路。
进一步地，所述座圈10的左右两侧的上表面的近顶端分别设有一个安装孔11，每个所述安装孔11内设有一个所述信号采集单元，所述信号接收电极片盖设于所述安装孔11的开口处，两个所述安装孔11内分别安装有所述第一运算放大器A和所述第二运算放大器A’。
进一步地，请参阅图5和图6，所述座圈10的左右两侧边内分别设有一个导线通孔，两个所述导线通孔的一端分别设于所述安装孔11的底部，两个所述导线通孔的另一端分别设于所述座圈10与座盖20的连接处，两个所述导线通孔内分别设有一根信号传送线，两根所述信号传送线的一端分别连接至所述第一运算放大器A和所述第二运算放大器A’的输出端，两个所述信号传送线的另一端分别连接至次级差分放大电路。所述信号传送线采用屏蔽电缆。
具体地，本实施例中的安装有所述弱电信号采集电路的座圈10，既可以安装于不带加热和冲洗功能的普通的马桶盖，也可以安装于具有加热和冲洗功能、人体生理特征参数(如体脂参数、体重参数、心电信号等)检测功能的智能马桶盖。
具体地，所述第一运算放大器A和所述第二运算放大器A’为前置放大器，放置于所述座圈10内，用于采集人体的心电信号，所述第二级运算放大器A2用于放大所述第一运算放大器A和所述第二运算放大器A’传送来的差分信号，将两级放大器电路分离后以所述信号传送线连接，将负反馈电阻R4使用两个电阻R4和R4’代替，并分别设置于所述座圈10左右两侧的所述信号采集单元内。
具体地，请参阅图5，所述座圈10左右两侧的所述导线通孔内各设置有一条信号反馈线，负反馈电阻R4和R4’由两段所述屏蔽电缆连接在一起，即负反馈电路由负反馈电阻R4和R4’及两段屏蔽电缆组成。请参阅图6，在另一实施例中，使用一根所述信号反馈线连接负反馈电阻R4和R4’，即负反馈电路由负反馈电阻R4和R4’及一段屏蔽电缆组成。
上述设置方式中，负反馈电阻R4和R4’之间，通过一段或者两段屏蔽电缆连接，使两个物理上间隔10厘米以上的采用有源电极的运算放大器的反向输入端采用屏蔽电缆相连，降低外界电信号对所述信号采集单元的干扰，提高系统对人体心电信号采集的准确度。
本实施例中，所述弱电信号采集电路可以应用于任意品种的马桶盖，可以在人们使用马桶时采集人体腿部的心电信号，即使是干燥的冬季，也能够有效地提取人体的心电信号。
实施例3
请参阅图7，示出本发明还公开了一种具有弱电信号采集电路的马桶盖100，包括安装有如上所述的具有弱电信号采集电路的座圈10以及脚垫板30，所述马桶盖还包括座圈调节机构。
所述脚垫板30包括脚踏支撑板31和折叠连接机构32，所述折叠连接机构32包括两个分别设于所述脚踏支撑板31两侧的连接组件，每个所述连接组件的一端连接于所述座圈10外侧，所述连接组件的另一端连接至所述脚踏支撑板31。
进一步地，所述座圈调节机构设于所述座圈10的底面，当所述脚踏支撑板31的高 度升高时，所述座圈调节机构用于使所述座圈10的前端提升一定角度。
具体地，本实施例中的马桶盖100，既包括不带加热和冲洗功能的普通的马桶盖100，也包括具有加热和冲洗功能的智能马桶盖100。
具体地，所述连接组件包括多节连接臂，所述多节连接臂活动连接以使所述连接臂伸缩或者折叠，使所述脚垫板30可折叠收纳于所述马桶座上。
具体地，所述座圈调节机构采用机械联动装置，实现所述脚踏支撑板31对所述座圈10的提升角度的控制。
在本实施例中，两个所述连接组件采用多节连接臂结构，使所述脚垫板30可以方便地伸展或者收纳，所述承重支脚33的长度可以调节，使所述脚垫板30的高度可以随之调节，从而改变所述脚垫板30与所述座圈10之间的高度差，方便老人和小孩使用。
需要说明的是，以上所述仅为本发明的优选实施例，并不用于限制本发明，对于本领域技术人员而言，本发明可以有各种改动和变化。凡在本发明的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (9)

  1. 一种弱电信号采集电路，其特征在于，包括两个信号采集单元，两个所述信号采集单元包括两个信号接收电极片和两个运算放大器，两个所述运算放大器形成差分电路，所述差分电路还包括第一反馈电阻R 3、第二反馈电阻R 3'和设于所述第一反馈电阻R 3和所述第二反馈电阻R 3'之间的负反馈电阻R 4；所述负反馈电阻R 4为负反馈电路，所述负反馈电路用于对所述信号接收电极片接收到的差模信号进行滤波处理。
  2. 如权利要求1所述的弱电信号采集电路，其特征在于，两个所述信号接收电极片包括第一信号接收电极片和第二信号接收电极片，两个所述运算放大器包括第一运算放大器A和第二运算放大器A’，两个所述信号采集单元包括第一信号采集单元和第二信号采集单元；
    所述第一信号接收电极片和所述第一运算放大器A组成所述第一信号采集单元，所述第一信号接收电极片连接至所述第一运算放大器A的同向输入端，所述第一反馈电阻R 3设于所述第一运算放大器A的反向输入端和输出端之间；
    所述第二信号接收电极片和所述第二运算放大器A’组成所述第二信号采集单元，所述第二信号接收电极片连接至所述第二运算放大器A’的同相输入端，所述第二反馈电阻R 3'设于所述第二运算放大器A’的反向输入端和输出端之间。
  3. 如权利要求1所述的弱电信号采集电路，其特征在于，两个所述信号接收电极片为有源电极片，两个所述信号接收电极片用于接收共模信号和差模信号。
  4. 如权利要求1所述的弱电信号采集电路，其特征在于，所述负反馈电路采用单个电阻或多个电子元件组成的具有频率特性的网络组件构成；或者，所述负反馈电路由具有全通、低通、高通、带通或者带阻频率特性的网络组件构成。
  5. 一种具有弱电信号采集电路的座圈，其特征在于，所述座圈安装有如权利要求1-4中任一项所述的弱电信号采集电路。
  6. 如权利要求5所述的座圈，其特征在于，所述座圈的左右两侧的上表面的近顶端分别设有一个安装孔，每个所述安装孔内设有一个所述信号采集单元，所述信号接收电极片盖设于所述安装孔的开口处，两个所述安装孔内分别安装有所述第一运算放大器A和所述第二运算放大器A’。
  7. 如权利要求6所述的座圈，其特征在于，所述座圈的左右两侧边内分别设有一个导线通孔，两个所述导线通孔的一端分别设于所述安装孔的底部，两个所述导线通孔的另一端分别设于所述座圈与座盖的连接处；
    两个所述导线通孔内分别设有一根信号传送线，两根所述信号传送线的一端分别连接至所述第一运算放大器A和所述第二运算放大器A’的输出端，两个所述信号传送线的另一端分别连接至次级差分放大电路。
  8. 如权利要求7所述的座圈，其特征在于，所述信号传送线采用屏蔽电缆。
  9. 一种具有弱电信号采集电路的马桶盖，其特征在于，包括安装有如权利要求5-8中任一项所述的具有弱电信号采集电路的座圈，所述座圈还包括座圈调节机构，所述座圈调节机构设于所述座圈的底面，所述座圈调节机构用于使所述座圈的前端提升一定角度。
PCT/CN2021/083998 2020-04-20 2021-03-30 弱电信号采集电路及具有该采集电路的座圈及马桶盖 WO2021213150A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/920,380 US20230157611A1 (en) 2020-04-20 2021-03-30 Weak current signal acquisition circuit, and seat and seat cover having same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010315692.4A CN111387972B (zh) 2020-04-20 2020-04-20 弱电信号采集电路及具有该采集电路的座圈及马桶盖
CN202010315692.4 2020-04-20

Publications (1)

Publication Number Publication Date
WO2021213150A1 true WO2021213150A1 (zh) 2021-10-28

Family

ID=71412388

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/083998 WO2021213150A1 (zh) 2020-04-20 2021-03-30 弱电信号采集电路及具有该采集电路的座圈及马桶盖

Country Status (3)

Country Link
US (1) US20230157611A1 (zh)
CN (1) CN111387972B (zh)
WO (1) WO2021213150A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111387972B (zh) * 2020-04-20 2023-10-31 广州易风健康科技股份有限公司 弱电信号采集电路及具有该采集电路的座圈及马桶盖
WO2022236468A1 (zh) * 2021-05-08 2022-11-17 深圳技术大学 一种用于微弱电信号采集的有源电极电路

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101828919A (zh) * 2010-04-28 2010-09-15 上海诺诚电气有限公司 一种具有放大功能的表面肌电电极
CN203507439U (zh) * 2013-08-30 2014-04-02 广州市凡科医疗设备有限公司 基于生物反馈技术的交互式盆底肌肉康复装置
CN204483982U (zh) * 2015-03-13 2015-07-22 广州市易风通讯科技有限公司 一种智能坐便器坐垫
US20160374619A1 (en) * 2015-06-23 2016-12-29 Rochester Institute Of Technology Apparatus, System and Method for Medical Analyses of Seated Individual
CN106939631A (zh) * 2017-03-24 2017-07-11 中山市美图塑料工业有限公司 一种心电导联智能马桶控制系统及其控制方法
CN107374486A (zh) * 2017-09-21 2017-11-24 北京理工大学 一种智能调姿可移动的坐便机器人
CN107456228A (zh) * 2017-03-07 2017-12-12 铂元智能科技(北京)有限公司 无线心电测量装置
CN107638121A (zh) * 2017-09-04 2018-01-30 广东美的环境电器制造有限公司 马桶盖及具有其的马桶
CN209018751U (zh) * 2018-05-04 2019-06-25 深圳市人民医院 测量宫缩压力的电路
CN110393526A (zh) * 2019-08-16 2019-11-01 北京师范大学 一种高频微弱脑电信号放大采集系统
CN111358328A (zh) * 2020-04-20 2020-07-03 广州易风健康科技股份有限公司 全隔离光路结构及采用全隔离光路结构的座圈及马桶盖
CN111387972A (zh) * 2020-04-20 2020-07-10 广州易风健康科技股份有限公司 弱电信号采集电路及具有该采集电路的座圈及马桶盖
CN111387863A (zh) * 2020-04-20 2020-07-10 王铭乾 可折叠脚垫板及带可折叠脚垫板的座圈及马桶盖
CN111419231A (zh) * 2020-04-20 2020-07-17 王沛 可检测体脂体重的装置及具有体脂体重检测功能的马桶盖
CN212729811U (zh) * 2020-04-20 2021-03-19 广州易风健康科技股份有限公司 弱电信号采集电路及具有弱电信号采集电路的座圈

Family Cites Families (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6411108B1 (en) * 1999-11-05 2002-06-25 Sensor Technologies, Inc. Noncontact signal analyzer
CN2912512Y (zh) * 2006-05-17 2007-06-20 杨振江 具有高抑制噪声能力的心电检测电路
JP2009105185A (ja) * 2007-10-23 2009-05-14 Yokogawa Electric Corp 磁気シールドルーム
CN201211186Y (zh) * 2008-07-04 2009-03-25 中国人民解放军第三军医大学野战外科研究所 一种抗干扰生物电信号记录电极
JP5655223B2 (ja) * 2009-01-30 2015-01-21 株式会社フジクラ 乗員姿勢検知装置
CN101536905B (zh) * 2009-05-06 2011-04-27 中国科学技术大学 表面肌电图系统及其电极板
CN201441368U (zh) * 2009-06-05 2010-04-28 大连大学 一种人体阻抗的测量装置
KR101156165B1 (ko) * 2009-07-23 2012-06-18 한국생산기술연구원 틸팅 가능한 시트를 구비한 변기장치
KR101771082B1 (ko) * 2011-01-17 2017-09-05 엘지디스플레이 주식회사 터치 감지 회로 및 이를 포함하는 디스플레이 장치
CN202882086U (zh) * 2012-09-27 2013-04-17 中企远航（北京）国际贸易有限公司 智能洁身器
CN203000929U (zh) * 2012-12-14 2013-06-19 江苏教育学院 无耦合电容心电信号前置放大电路
TWM477245U (zh) * 2014-01-14 2014-05-01 zhen-fan Zhang 符合人體工學的馬桶坐墊組
CN203749319U (zh) * 2014-01-28 2014-08-06 北京泰乐华科技有限公司 智能坐便器坐垫及坐便器
DE202014101296U1 (de) * 2014-03-20 2014-07-04 Joseph Wang Toilettensitz
CN203802458U (zh) * 2014-03-26 2014-09-03 广东瑞德智能科技股份有限公司 一种心电信号采集及预处理电路
CN104000583A (zh) * 2014-05-04 2014-08-27 山东中医药大学 一种心电信号前置放大电路
CN104007322B (zh) * 2014-06-12 2017-05-17 中国人民解放军第四军医大学 一种用于电阻抗成像的高精度数据采集系统
CN104358295B (zh) * 2014-11-03 2016-05-25 宁波博帆卫浴有限公司 一种节水防堵的马桶
CN204318745U (zh) * 2014-11-06 2015-05-13 黎国平 一种具有人体生理参数监测功能的马桶座圈
CN204483995U (zh) * 2015-02-13 2015-07-22 重庆交通大学 助力马桶架
CN104799854B (zh) * 2015-04-29 2017-10-24 深圳大学 一种表面肌电采集装置及其肌电信号处理方法
WO2016181487A1 (ja) * 2015-05-12 2016-11-17 日産自動車株式会社 車両用シート
CN205192649U (zh) * 2015-11-04 2016-04-27 中国地震局地震预测研究所 地震台站高精度温度测量装置
CN105908817B (zh) * 2016-04-13 2018-08-31 泉州科牧智能厨卫有限公司 坐便器坐姿测量方法
CN106385241A (zh) * 2016-09-19 2017-02-08 中国科学院合肥物质科学研究院 一种适用于聚变堆强电磁环境的高灵敏电流放大器
CN206189545U (zh) * 2016-11-01 2017-05-24 段平华 一种益于身体健康的马桶
CN106725441A (zh) * 2017-01-09 2017-05-31 上海医思信息科技合伙企业（有限合伙） 一种接触式心电信号采集椅及心电信号测量系统
CN107411622A (zh) * 2017-04-28 2017-12-01 李国翚 具有测量功能的坐厕椅架
CN107425820B (zh) * 2017-08-30 2024-02-09 浙江九州量子信息技术股份有限公司 基于电流反馈式运放实现高频信号共模抑制的放大电路
CN107700620B (zh) * 2017-09-29 2020-04-21 袁国明 智能蹲便马桶
CN107761892A (zh) * 2017-11-22 2018-03-06 张彩银 一种具有垫脚装置的智能马桶
KR102001463B1 (ko) * 2017-12-29 2019-07-18 동명대학교산학협력단 좌변 보조장치
CN208701838U (zh) * 2018-08-23 2019-04-05 合肥学院 一种便于老年人使用的马桶
CN209315711U (zh) * 2018-09-05 2019-08-30 广州易风健康科技股份有限公司 一种带传感器马桶座圈
CN210121136U (zh) * 2018-09-21 2020-03-03 杭州电子科技大学 一种心电脉搏监测马桶
CN109067375A (zh) * 2018-09-29 2018-12-21 贵州电网有限责任公司 一种pt二次侧中性点多点接地检测电流信号放大电路
CN210130770U (zh) * 2018-12-14 2020-03-10 上海荒岛科技有限公司 一种坐垫及心电检测系统

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101828919A (zh) * 2010-04-28 2010-09-15 上海诺诚电气有限公司 一种具有放大功能的表面肌电电极
CN203507439U (zh) * 2013-08-30 2014-04-02 广州市凡科医疗设备有限公司 基于生物反馈技术的交互式盆底肌肉康复装置
CN204483982U (zh) * 2015-03-13 2015-07-22 广州市易风通讯科技有限公司 一种智能坐便器坐垫
US20160374619A1 (en) * 2015-06-23 2016-12-29 Rochester Institute Of Technology Apparatus, System and Method for Medical Analyses of Seated Individual
CN107456228A (zh) * 2017-03-07 2017-12-12 铂元智能科技(北京)有限公司 无线心电测量装置
CN106939631A (zh) * 2017-03-24 2017-07-11 中山市美图塑料工业有限公司 一种心电导联智能马桶控制系统及其控制方法
CN107638121A (zh) * 2017-09-04 2018-01-30 广东美的环境电器制造有限公司 马桶盖及具有其的马桶
CN107374486A (zh) * 2017-09-21 2017-11-24 北京理工大学 一种智能调姿可移动的坐便机器人
CN209018751U (zh) * 2018-05-04 2019-06-25 深圳市人民医院 测量宫缩压力的电路
CN110393526A (zh) * 2019-08-16 2019-11-01 北京师范大学 一种高频微弱脑电信号放大采集系统
CN111358328A (zh) * 2020-04-20 2020-07-03 广州易风健康科技股份有限公司 全隔离光路结构及采用全隔离光路结构的座圈及马桶盖
CN111387972A (zh) * 2020-04-20 2020-07-10 广州易风健康科技股份有限公司 弱电信号采集电路及具有该采集电路的座圈及马桶盖
CN111387863A (zh) * 2020-04-20 2020-07-10 王铭乾 可折叠脚垫板及带可折叠脚垫板的座圈及马桶盖
CN111419231A (zh) * 2020-04-20 2020-07-17 王沛 可检测体脂体重的装置及具有体脂体重检测功能的马桶盖
CN212729811U (zh) * 2020-04-20 2021-03-19 广州易风健康科技股份有限公司 弱电信号采集电路及具有弱电信号采集电路的座圈

Also Published As

Publication number Publication date
US20230157611A1 (en) 2023-05-25
CN111387972A (zh) 2020-07-10
CN111387972B (zh) 2023-10-31

Similar Documents

Publication Publication Date Title
WO2021213150A1 (zh) 弱电信号采集电路及具有该采集电路的座圈及马桶盖
US8519792B2 (en) Differential voltage sensing system and method for using the same
Metting van Rijn et al. High-quality recording of bioelectric events: part 1 interference reduction, theory and practice
KR101227413B1 (ko) 전기적 비접촉식 생체 신호 측정 장치 및 그 방법
US20080159365A1 (en) Analog Conditioning of Bioelectric Signals
KR101440444B1 (ko) 생체 신호를 측정하기 위한 전극 구조체 및 이를 이용한 심전도 측정 장치
CN201211186Y (zh) 一种抗干扰生物电信号记录电极
CN108478218A (zh) 基于高性能电路与虚拟仪器的脑电信号采集系统
CN107174260A (zh) 健康手环
CN212729811U (zh) 弱电信号采集电路及具有弱电信号采集电路的座圈
CN108134582B (zh) 一种模拟前端电路
CN103654742A (zh) 一种监测人体健康状态的多参数识别系统
JP4281380B2 (ja) 生体信号測定装置
Li et al. Analysis of op-amp power-supply current sensing current-mode instrumentation amplifier for biosignal acquisition system
Lee et al. An ECG front-end subsystem for portable physiological monitoring applications
CN104706344A (zh) 一种心电信号测量采集系统
Huynh et al. A 53GΩ@ DC Input Impedance Multi-Channel Neural Recording Amplifier with 0.77 μVrms Input-Referred Noise for Deep Brain Implants
KR102338892B1 (ko) 생체 신호 처리 장치
CN111387863A (zh) 可折叠脚垫板及带可折叠脚垫板的座圈及马桶盖
Burke et al. An ultra-low power pre-amplifier for pasteless electrocardiography
Sinha et al. A 22nm±0.95 V CMOS OTA-C front-end with 50/60 Hz notch for biomedical signal acquisition
CN216090516U (zh) 心电采集设备及对应的心电电极片
Cindrić et al. Analog frontend for ECG/EMG capacitive electrodes
Millar et al. A low-noise optically isolated preamplifier for use with extracellular microelectrodes
Liang et al. A switched-capacitor-based low-power receiver for electrocardiogram and respiration rate detection

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21791884

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21791884

Country of ref document: EP

Kind code of ref document: A1