EP0269796A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for detecting bioelectric signals
Assignee: Individual
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Filing: 1987-09-09
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Granted: —
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Expires: 2007-09-09
Abstract
Abstract An apparatus (10) for detecting bioelectric signals according to the present invention, comprises: a detecting electrode (20), a reference electrode (30), a stimulating signal generating circuit (40), a micro-current amplifying circuit (50), a signal processing circuit (60) and an output device (70). The detecting apparatus (10) applies a stimulating voltage in the range of 0.5-3.0 V to a reference acupoint on human or animal body via the reference electrode (30), and detects simutaneously the response current in the range 10⁻¹¹ - 10⁻⁴A at different acupoints on the body with the detecting electrode (20) at a certain pressure to acupoints, then the time response of the current is processed by the signal processing circuit (60) to obtain the useful information for diagnosing diseases and verifying the therapeutic effects.
Inventors
- 👤 Hansen Gu
- 👤 Dumin Wu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 00:07
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/36014; A61N1/36017; A61H; A61H39/00; A61H39/02; Y; Y10; Y10S; Y10S128/00; Y10S128/907
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
100 words
An apparatus for detecting bioelectric signals, comprising: a detecting electrode; a reference electrode; an amplifying circuit connected to said detecting electrode for amplifying signals detected thereby; a stimulating signal generating circuit connected to said reference electrode for applying a stimulating voltage thereon; Wherein, said detecting electrode, reference electrode, amplifying circuit, stimulating signal generating circuit form a detecting loop for detecting bioelectric signals; the apparatus further comprising: a signal processing circuit connected to the output of said amplifying circuit for processing its output signals; and an output device connected to the output of said signal processing circuit for displaying detected results.
Claim 2
Independent Claim
100 words
An apparatus for detecting bioelectric signals, comprising: a detecting electrode; a reference electrode; an amplifying circuit connected to said detecting electrode for amplifying signals detected thereby; a stimulating signal generating circuit connected to said reference electrode for applying a stimulating voltage thereon; Wherein, said detecting electrode, reference electrode, amplifying circuit, stimulating signal generating circuit form a detecting loop for detecting bioelectric signals; the apparatus further comprising: a signal processing circuit connected to the output of said amplifying circuit for processing its output signals; and an output device connected to the output of said signal processing circuit for displaying detected results.
Claim 3
Dependent Claim
33 words
An apparatus for detecting bioelectric signals as claimed by Claim 1, wherein said stimulating voltage generated by said stimulating signal generating circuit is a DC voltage in the range 0.5 - 3.0 V.
Claim 4
Dependent Claim
110 words
An apparatus for detecting bioelectric signals as claimed by Claim 1, wherein said amplifying circuit comprising; a logarithmic micro-current amplifier; a temperature compensating circuit; and an inverting circuit; wherein, said logarithmic micro-current amplifier has an input connected to said detecting electrode, and an output connected to an input of said temperature compensating circuit which has an output connected in turn to the input of said inverting circuit, then the output of the inverting circuit is provided to the input of said signal processing circuit, thereby a micro-current in the range of 10⁻¹¹ - 10⁻⁴ ampere is amplified to provide an output signal proportional to the negative logarithm of said micro-current.
Claim 5
Dependent Claim
140 words
An apparatus for detecting bioelectric signals as claimed by Claim 1, wherein said amplifying circuit comprising: a first differential amplifier; a second differential amplifier; an emitter follower; and a feedback circuit comprising a selecting switch and a resistor network; wherein, said first differential amplifier has an input connected to said detecting electrode, and an output connected to the input of said second differential amplifier whose output is connected to the input (base) of said emitter follower, which in turn provides its output to the input of said signal processing circuit, said feedback circuit is connected between th input of said first differential amplifier and the output of said emitter follower, and the gain of the amplifying circuit is changed by said selecting switch to perform an exponentially scaled linear amplification of a micro-current in the range of 10⁻¹¹ - 10⁻⁴ampere.
Claim 6
Dependent Claim
82 words
An apparatus for detecting bioelectric signals as claimed by Claim 1, wherein said detecting electrode comprising: an inner conductor; an outer conductor which screens said inner conductor: a coaxial cable with its inner and outer conductors connected respectively to said inner and outer conductors; an insulating layer which insulates said inner and outer conductors from each other at their detecting ends; wherein, during detection said inner conductor keeps a noninvasive contact with acupoint skin while said outer conductor is insulated from skin.
Claim 7
Dependent Claim
106 words
An apparatus for detecting bioelectric signals as claimed by Claim 1, wherein said detecting electrode comprising: an inner conductor formed by an acupuncture needle; an outer conductor which screens said inner conductor; a coaxial cable with its inner and outer concucotrs connected respectively to said inner and outer conductors; an insulating layer which insulates said inner and outer conductors from each other at their detecting ends; wherein, during detection said inner conductor is acupunctured into a point while said outer conductor is insulated from skin, and said stimulating voltage provided by said stimulating signal generating circuit is a DC voltage in the range of 0.5-1.5 V.
Claim 8
Dependent Claim
60 words
An apparatus for detecting bioelectric signals as claimed by Claim 5, where said detecting electrode comprising: an elastic member which is insulatedly fixed at its two end to said inner and outer conductors, respectively, to make said inner conductor longitudinally movable relative to said outer conductor, thereby to maintain a constant pressure applied to an acupoint by said inner conductor.
Claim 9
Dependent Claim
73 words
An apparatus for detecting bioelectric signals as claimed by Claim 7, wherein said detecting electrode comprising: means for adjusting pressure, which is mounted on the detecting end of said outer conductor with its position adjustable along the length of said outer conductor, thereby to change the movabe length of said inner conductor relative to said outer conductor and hence the pressure applied to an acupoint by said elastic member via said inner conductor.
Claim 10
Dependent Claim
60 words
An apparatus for detecting bioelectric signals as claimed by Claim 1, wherein said signal processing circuit comprising: a delay circuit; and a sample-and-hold circuit; wherein, said sample-and-hold circuit samples the output signal of said amplifying circuit with a fixed delay time under the control of said delay circuit, and holds the sampled signal for providing it to said output device.
Claim 11
Dependent Claim
99 words
An apparatus for detecting bioelectric signals as claimed by Claim 1, wherein said signal processing circuit comprising: an A/D converter; a CPU; a memory; an interface circuit; and a key-board; wherein, said A/D converter has its input connected to the output of said amplifying circuit to convert the analog signal therefrom into digital signal, which is sent to said CPU via a data bus, said CPU processes said digital signal according to a operation routing stored in said memory and instructions inputted through said key-board, and the processed results is sent to said output device via said interface circuit.
Claim 12
Dependent Claim
137 words
An apparatus for detecting bioelectric signals as claimed by Claim 1, wherein said signal processing circuit comprising: a threshold voltage dividing circuit which has two outputs providing respectively a upper and a lower threshold signals; a pair of comparators connected to the output of said amplifying circuit and the outputs of said upper and lower threshold signals to compare the output signal of said amplifying circuit with said upper and lower threshold signals, respectively, to decide the range of said output signal; a pair of displaying devices connected to the outputs of said comparators respectively, to display the comparison result according to the output signals of said comparators; and a cut-off circuit which cuts off the output of said comparators when the output signal of said amplifying circuit is zero, to make said displaying devices stand still.
Claim 13
Dependent Claim
90 words
An apparatus for detecting bioelectric signals as claimed by Claim 7, wherein said detecting electrode further comprising a triggering switch which generates an activating signal when said inner conductor contacts an acupoint with a certain presure; said signal processing circuit comprising a flip-flop connected to and receiving signal from said triggering switch, to generate control signals for said signal processing circuit and said stimulating signal generating circuit according to said activating signal; and said stimulating signal generating circuit comprising a circuit controled by said flip-flop for generating said stimulating signal.
Claim 14
Dependent Claim
90 words
An apparatus for detecting bioelectric signals as claimed by Claim 9, wherein said detecting electrode further comprising a triggering switch which generates an activating signal when said inner conductor contacts an acupoint with a certain presure: said signal processing circuit further comprising a flip-flop connected to said triggering switch for providing a control signal to said delay circuit upon receiving the activating signal, to make said delay circuit generating a delay signal; and said stimulating signal generating circuit comprising a circuit controled by said flip-flop for generating said stimulating signal.
Claim 15
Dependent Claim
93 words
An apparatus for detecting bioelectric signals as claimed by Claim 10, wherein said detecting electrode further comprising a triggering switch which generates an activating signal when said inner conductor contacts an acupoint with a certain pressure; said signal processing circuit further comprising a flip-flop connected to said triggering switch for providing an initiating signal to said CPU upon receiving the activating signal, to start the processing routine of said CPU to process the detected signals; and said stimulating signal generating circuit comprising a circuit controled by said flip-flop for generating said stimulating signal.
Claim 16
Dependent Claim
51 words
An apparatus for detecting bioelectric signals as claimed by Claim 9, wherein said delay circuit provides an output signal for controling said sample-and-hold circuit to sample the output signal of said amplifying circuit with a fixed delay time in the range of 1.0-2.0 second, and hold the sampled signal for output.
References Cited (Backward Citations)
No citation records indexed.
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