JP2002125944A - Biological signal processing device and control method of biological signal processing device - Google Patents

Abstract

(57) [Problem] To provide a Holter electrocardiograph capable of visually confirming an operating state of an apparatus and an electrocardiogram signal collection state in a Holter electrocardiograph with a simple configuration and a minimum space. SOLUTION: A living body signal collected from a living body electrode 90 is supplied to a signal having a predetermined level by an electrocardiographic amplifier 11 to an LED light emitting element (LED) 30 via a capacitor c and a resistor R1. The bias power supply voltage is applied to the LED 30 via the resistor R2. The bias voltage level is set to a voltage at which the minimum voltage level supplied to the LED 30 becomes a positive potential when an electrocardiogram signal is input to the input amplification unit 10. Control to the intensity change state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biological signal processing apparatus provided with an input amplifying section for inputting and amplifying a biological signal from a detecting section for detecting a biological signal and a light emitting means, and a biological signal processing apparatus. The present invention relates to a portable biological signal processing device and a biological signal processing device suitable for collection.

[0002]

2. Description of the Related Art A so-called medical telemeter transmitter that collects an electrocardiogram of a subject and wirelessly transmits the collected electrocardiogram to a monitor installed in a nurse center or the like has been used. In this type of medical telemeter transmitter, an electrocardiogram electrode is attached to a predetermined portion on the skin surface of a subject, and a collected electrocardiogram from the electrocardiogram electrode is wirelessly transmitted.

In this type of device, it is necessary to confirm whether or not the ECG electrode is properly mounted. For this purpose, it is conceivable to provide a display having a display screen for displaying the collected electrocardiogram waveforms from the electrocardiogram electrodes like a general electrocardiograph, but the above-described apparatus minimizes the load on the subject. First, it is required to reduce the size and weight in order to suppress it, and a configuration including the above-mentioned display, which makes the device larger, cannot be practically adopted.

[0004]

As a result, confirmation of the mounting state of the electrodes is made to the receiving device for receiving the electrocardiogram information installed at a place remote from the telemeter transmitting device and the display device thereof, and the display screen thereof is displayed. Must be confirmed and was very troublesome.

[0005]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems, and it is possible to grasp the state of attachment of a biological signal detector, for example, an electrocardiogram electrode, with a simple configuration. It is an object of the present invention to provide a biological signal processing device, for example, a Holter monitor. For example, the following configuration is provided as a means for achieving the object.

That is, a power supply unit for supplying drive power to the apparatus, an input amplification unit for inputting and amplifying a biological signal from a detection unit for detecting a biological signal, and a predetermined bias applied to an output signal from the amplification input unit Biasing means for applying a voltage, and light emitting means for emitting light at an intensity corresponding to a biological signal to which a predetermined bias voltage has been applied by the biasing means. It is characterized in that the detection states of the detection units can be simultaneously recognized.

[0007] For example, the biometric signal is an electrocardiogram signal, the detection section is an electrocardiogram electrode, and the biasing means is configured such that when no signal of the electrocardiogram signal from the input amplifying section is detected, the light emission intensity of the light emission means is a half light emission intensity. A bias voltage is applied such that

A biological signal processing apparatus in a biological signal processing apparatus including an input amplifying section for inputting and amplifying a biological signal from a detecting section for detecting a biological signal, and a light emitting means, wherein the input of the input amplifying section is Amplifying the signal, applying a predetermined bias voltage, causing the light emitting unit to emit light at an intensity corresponding to the biological signal to which the bias voltage has been applied, and operating the power supply unit and detecting the detecting unit based on the light emitting state of the light emitting unit. It is characterized by comprising means for simultaneously recognizing the detection state.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to the drawings. In the following description, an example in which the present invention is applied to a medical telemeter device that collects an electrocardiogram and wirelessly transmits the electrocardiogram to a monitor device or the like as an example of a biological signal processing device will be described. However, it goes without saying that the present invention is applicable to various biological signal processing devices that input and process signals from a living body, and in particular, are applied to medical equipment that is strongly required to be miniaturized, such as a Holter monitor. First, a configuration of a medical telemeter device capable of collecting an electrocardiogram signal and wirelessly transmitting an electrocardiogram signal according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration of a medical telemeter device according to an embodiment of the present invention.

In FIG. 1, reference numeral 10 denotes an input amplifying unit for inputting a collected electrocardiogram signal from a biological electrode 90 which is an electrocardiogram electrode attached to a predetermined position on the skin surface of the insurer according to the present embodiment. An input amplifying unit that amplifies a biological signal from the biological electrode 90 and outputs the amplified signal from the bias circuit 20.

Reference numeral 20 denotes a bias circuit for applying a predetermined bias voltage to the electrocardiogram signal from the input amplifier 10, and 30 denotes a bias circuit 20 for the output signal from the input amplifier 10.
And an LED light emitting unit that emits light at an intensity corresponding to the signal level to which the bias voltage is applied.

Reference numeral 40 denotes a sampling unit that converts an output signal from the input amplifying unit 10 sent via the bias circuit 20 into a corresponding digital signal according to a predetermined sampling timing, and removes noise components from the converted electrocardiogram signal information. This is a biological signal processing unit that performs predetermined signal processing, such as performing a predetermined process, and outputs the collected signal to the collection signal transmitting unit 50, for example, in a time division manner.

A reference numeral 50 denotes a modulator for modulating transmission information sent from the biological signal processing unit 40 and outputting a modulated high-frequency signal to the signal cable 100 by using the signal cable 100 connecting the biological electrode 90 and the input amplifying unit 10 as an antenna. A biological signal processing unit 60 for wirelessly transmitting the data is an operation unit, which includes a power switch, a start switch, and the like.

Reference numeral 80 denotes a power supply unit which supplies a driving power to each component of the apparatus of the embodiment and supplies a predetermined bias voltage to the bias circuit 20. For example, a constant DC voltage supplied from a battery is provided. Is converted into a drive voltage required in each configuration by a converter and supplied.

Numeral 90 is attached to a predetermined skin surface of the subject,
Biological electrode (electrocardiogram electrode) for detecting an electrocardiogram signal, 100
Reference numeral denotes a shield signal cable for connecting between the biological electrode 90 and the input amplifying unit 10. In this embodiment, the shield signal cable is also used as an antenna for wireless transmission from the collection signal transmitting unit 50.

A detailed configuration of the bias circuit 20 and the LED light-emitting unit 30 having the above-described configuration and specific to this embodiment will be described with reference to FIG. FIG. 2 is a circuit diagram for explaining a detailed configuration of the bias circuit 20 and the LED light emitting unit 30 specific to the present embodiment.

In FIG. 2, a collected biological signal from a biological electrode 90 is input to an electrocardiographic amplifier 11 of an input amplifying unit 10, where it is amplified to a predetermined level of an electrocardiographic signal. The output from the ECG 11 is a DC component of the ECG 11.
Is input to the bias circuit 20 via the capacitor c for preventing the backflow to the bias circuit 20.

The bias circuit 20 supplies the signal from the input amplifying section 10 to the biological signal processing section 40 as it is, and forms an LED light emitting element (LED) constituting the LED light emitting section 30 whose other terminal is grounded via the resistor R1. ) To one terminal.

A bias voltage from a power supply unit 80 is applied to a signal supplied to one terminal of the LED light emitting unit 30 via a resistor R2, and a predetermined bias voltage is superimposed on a connection between the resistor R1 and the LED 30. Configuration. In the present embodiment, when the electrocardiogram signal is input to the input amplification unit 10, the bias voltage level
When the minimum voltage level supplied to the connection with the light emitting element is a normal waveform, the voltage level is controlled to a voltage level that becomes a positive potential.

FIG. 3 shows an example of the state of the voltage applied to the light emitting section 30 (the driving voltage of the light emitting section 30) of the present embodiment having the above configuration. FIG. 3 is a timing chart showing a state example of the voltage applied to the light emitting unit 30 (the driving voltage of the light emitting unit 30) in the present embodiment.

Before the power is turned on to the medical telemeter device of this embodiment, no driving power is supplied to the LED light emitting unit 30, and the LED light emitting unit 30 does not emit light. This state is the period shown in FIG. Therefore, if the light emitting state of the LED light emitting unit 30 is the non-light emitting state, it can be visually confirmed that the driving power is not supplied to the device. In addition, even when the driving battery of the medical telemeter device is exhausted and the supplied power is reduced, the amount of light emitted from the LED light emitting unit 30 is always low. it can.

When the power is turned on, the state shifts to the state shown in FIG. 3B, and the supply voltage to the LED light emitting unit 30 becomes a bias voltage when the power supply unit 80 is operating normally. Therefore, when there is no input and the power is simply turned on, a half-lighting state (a state in which light is emitted at an intermediate intensity), which is a light-emitting state by a bias voltage, is obtained. Therefore, if the LED light emitting unit is in the half-lighted state, the power is turned on to the device, but the bioelectrode 9 is turned on.
It can be visually confirmed that no collected electrocardiogram signal from 0 has been input.

In this state, the biological electrode 90 is
When the electrocardiogram signal is input, the supply voltage to the LED light emitting unit 30 changes, for example, as shown in c, d, e, and f in FIG. The state of c in FIG. 3 is a state in which the supply voltage to the LED light emitting unit 30 is reduced, the light emission intensity is weakened,
Conversely, in the state shown in FIG. 3D, the supply voltage to the LED light emitting unit 30 becomes extremely high, and the light emission intensity becomes strong.

Similarly, the state of FIG.
In a state where the supply voltage to 0 is slightly lowered, the light emission intensity is slightly weakened. Conversely, in the state shown in FIG.
The supply voltage to the device is slightly increased, and the light emission intensity is slightly increased. The same applies to FIGS. 3g, h, i, and j.

As a result, while the electrocardiogram signal is being input, the light emitting state of the LED light emitting unit 30 is a repetitive state between a weak light emitting state and a strong light emitting state, and the light emitting intensity changes. Therefore, if this light emission state can be confirmed, it can be visually confirmed that the electrode 90 is normally mounted and that the electrocardiogram signal is also normally collected.

With the above-described configuration, only one power lamp for identifying the presence or absence of power-on and a display for confirming whether or not a biological signal is normally collected are provided. The LED light emitting element can also be used, so that the configuration can be simplified and the power consumption required for display can be reduced.

Further, even if the operation of the device becomes abnormal due to some circumstances, it is possible to easily confirm the light emitting state of the LED light emitting element simply by visual observation.

In the above example, an example is described in which the power supply lamp and the ECG collection state display lamp are both used. However, a separate power supply lamp is provided, and the LED display unit 30 shown in FIG. It may be configured to be used only for In this case, the bias voltage can be further reduced, and a state in which almost no light is emitted when no signal is received may be employed.

[0029]

As described above, according to the present invention, a biological signal can be reliably detected only by its own device without having to use a special device for confirmation, etc., only with a simple configuration. The state of attachment of the detection unit to the subject and the operation state of the device can be visually confirmed. Further, the state of the drive power supply of the apparatus and the operation state of the apparatus can be confirmed together.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a medical telemeter device according to an embodiment of the present invention.

FIG. 2 shows a bias circuit and an LED unique to the embodiment.
FIG. 3 is a circuit diagram for describing a detailed configuration of a light emitting unit.

FIG. 3 is a timing chart for explaining light emission control of a light emitting unit in the embodiment.

Claims (4)

[Claims] A power supply unit for supplying driving power to the device; an input amplifying unit for inputting and amplifying a biological signal from a detecting unit for detecting a biological signal; and a predetermined bias applied to an output signal from the amplified input unit. Biasing means for applying a voltage; and light emitting means for emitting light at an intensity corresponding to a biological signal to which a predetermined bias voltage has been applied by the biasing means. A biological signal processing device capable of simultaneously recognizing a detection state of a detection unit. 2. The method according to claim 1, wherein the biometric signal is an electrocardiogram signal, the detection unit is an electrocardiogram electrode, and the bias unit is configured such that when the signal of the electrocardiogram signal from the input amplifying unit is not detected, the emission intensity of the light emission unit is a half emission intensity. 2. The biological signal processing device according to claim 1, wherein a bias voltage is applied so as to be applied. 3. A control method for a biological signal processing device in a biological signal processing device comprising: an input amplifying unit that inputs and amplifies a biological signal from a detecting unit that detects a biological signal; and a light emitting unit, wherein the input amplifying unit Amplify the input signal in the above, apply a predetermined bias voltage, and cause the light emitting means to emit light at an intensity corresponding to the biological signal to which the bias voltage is applied. A control method of a biological signal processing device, wherein a detection state of a detection unit can be simultaneously recognized. 4. The apparatus according to claim 1, wherein the biological signal is an electrocardiogram signal, the detection unit is an electrocardiogram electrode, and the bias voltage is such that the light emission intensity of the light emission unit is half emission intensity when no signal of the input electrocardiogram signal from the input unit is detected. 4. The control method for a biological signal processing device according to claim 3, wherein