JP2691358B2 - Biological signal acquisition and transmission device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a biological signal collecting and transmitting apparatus including electrodes for collecting an electrocardiographic signal and a telemeter transmitter for transmitting the signal to a measuring apparatus, and particularly to a subject himself / herself. The present invention relates to a biological signal collecting and transmitting device that can be easily handled.

(Prior Art) A telemeter transmitter for an electrocardiograph has a conventional structure as shown in FIG. As shown in the figure, the telemeter transmitter main body 1, the electrode 2 which is a sensor for collecting an electrocardiographic signal, and the lead wire 3 which connects the two exist as separate physical entities.

(Problems to be Solved by the Invention) By the way, the connection between the respective constituent units, particularly the connection between the electrode 2 and the lead wire 3, is a problem, and a hook type connector is used for the connection portion 4, so Often connected and used each time. As described above, the fact that a plurality of electrodes 2 have to be connected to the lead wire 3 each time it is used causes most of the trouble in use. The reason why it is necessary to connect each time it is used is because the electrode 2 must be a disposable one. If a non-disposable semi-permanently usable electrode is used, regular disinfection and cleaning are essential conditions, and it is extremely difficult to let the subject do it, which is even more troublesome to use. There is a danger that it will happen.

Further, the telemeter transmitter body 1 is always used while being carried, and must be separately attached depending on clothes, belts, and bands. At this time, it is also a troublesome point to hold the lead wire 3 in a pocket so as not to pull it.

A structure similar to a template has been devised in order to semi-automatically attach the electrode 2, but this is also useful for improving the work efficiency of medical staff, but it is designed for the self-help action of the subject. It wasn't what was done.

Further, the small electrode 2 has a problem that it has a large coupling impedance regardless of whether it is disposable or semi-permanently used, and that it can easily pick up a power saving signal of the muscle immediately below. This is a troublesome problem when trying to perform an exercise test in electrocardiography.

The present invention has been made in view of the above points, and an object of the present invention is to realize a biological signal sampling and transmitting apparatus including a set of transmitting side devices of an electrocardiograph telemeter that can be automatically handled by a subject.

Still another object is to realize a biological signal sampling and transmitting apparatus that can minimize the mixture of power saving signals.

(Means for Solving the Problems) According to the present invention for solving the above problems, a plurality of electrodes embedded in a required part used for collecting an electrocardiographic signal from a subject and leads connected to the electrodes. Wire, a telemeter transmitter main body for converting the collected electrocardiographic signal into an electromagnetic wave and transmitting the electromagnetic wave to a telemeter receiver, and a plurality of central portions attached to tabs provided on the upper part of the telemeter transmitter main body And a housing means for housing the telemeter transmitter body having a conductor plate having a hole and a hook which is used for enclosing the telemeter transmitter body and which is connected to the lead wire and passes through the hole of the conductor plate. It is characterized by comprising underwear.

(Function) When the electrode is attached to the inner surface of the underwear to be worn by the subject and the telemeter transmitter main body is enclosed by the hook of the accommodating means for accommodating the telemeter transmitter main body, the electrode is connected at that time and the power is turned on. It can be easily used without re-connection.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an external view of an embodiment of the present invention, FIG. 2 is a sectional view of a pocket portion, and FIG. 3 is a view of a telemeter transmitter main body housed in the pocket. In each drawing, the same reference numerals are given to the same parts between FIG. 10 and each drawing. In the figure, 10 is a signal electrode according to an embodiment of the present invention, an electrode having a pocket 11 attached thereto, and underwear with a pocket (hereinafter simply referred to as underwear), 12 is a conductive material provided on the inner surface of the underwear 10 that directly contacts the subject. Electrode made of cloth, left shoulder, right shoulder,
It is provided at three places on the left flank. The left shoulder, right shoulder, and left flank correspond to the left hand (LA), right hand (RA), and left foot (LL) of standard limb guidance (lead I), respectively. In FIG.
Reference numeral 13 denotes a cloth portion of the underwear 10, and a hook 15 is attached between the pocket 11 and the cloth portion forming the transmitter accommodating space 14. The inner hook 15 and the electrode 12 are connected via the lead wire 3. In FIG. 3, reference numeral 16 denotes an outer casing that houses the circuit board 17 of the telemeter transmitter main body 1, and a battery 18 and circuit components 19 are attached to the circuit board 17. A tab 20 is provided on the top of the circuit board 17, and three connection plates 22 having hook holes 21 are attached to the tab 20. The connection plate 22 is connected to the connector portion of the circuit board 17, and is connected to the lead wire 3 by stopping the hook 15 through the hook hole 21. Outer casing
If the 16 cannot be opened due to the hermetically sealed structure, the battery 18 may be used together with the telemeter transmitter main body 1 as a disposable battery.
It can be used in both cases of recharging with a secondary battery.

Next, the operation of the embodiment will be described. The subject wears the undergarment 10, puts the telemeter transmitter body 1 in the pocket 11, and hooks the hook 15 through the hook hole 21 of the tab 20.
FIG. 4 is a diagram showing a state in which the telemeter transmitter main body 1 is housed and hooked. In the figure, the same parts as those in FIGS. 1 to 3 are designated by the same reference numerals. In this way, the circuit of the telemeter transmitter main body 1 is such that the hook 15 passing through the hook hole 21 comes into contact with the connecting plate 22 and leads via the lead wire 3 to the electrode.
Connected to 12. By wearing this undergarment 10, the electrodes are attached one by one to the body, the lead wires 3 are frequently used in the telemeter transmitter main body 1, and the telemeter transmitter main body 1 is separately put in a pocket and held and carried. To be done. In this embodiment, the lead wire 3 can also serve as a transmission antenna.

The conductive cloth used for the electrode 12 may be either a woven fabric or a non-woven fabric, and silver-plated glass fibers or the like are mixed-spun or mixed-woven. Of course, the silver wire itself or a copper wire plated with silver may be used. From the viewpoint of physical or chemical biosafety, carbon fiber is considered optimal. The mixture ratio of the conductor of the cloth forming the electrode 12 is 30 to 100 in the case of carbon fiber.
%, 40% to 50% is preferable for metal type. Also, instead of kneading or kneading, a thin cloth made of cotton or chemical fiber such as gauze and a conductive cloth or a mesh bound with a rag has the same effect. In any case, the electrode 12 made of a conductive cloth needs to have hydrophilicity in order to improve the electrical connection with the living body, and it is the same as the electrode 2 of a normal electrocardiograph. In addition, it is preferable to use a conductive hydrophilic gel or a wetting agent. However, without using this gel, hydrophilicity is a necessary condition so that the subject substitutes sweat, water vapor, or some kind of humidity that is emitted from the body surface.

It is beneficial to make the undergarment 10 of elastic, stretchable fabric to adhere the electrodes 12 to the body surface. However, since the area of the electrode 12 is actually large, it may be a little loose. A large electrode area is effective for reducing electrochemical noise, and is particularly effective for reducing mixing of power saving signals, which is the most problematic in stress tests. This power saving signal is received by the node action potential generated by the muscle just below the body surface, but since it is incoherent as a spatial distribution, the larger the area of interest, the more averaged and received myoelectric signal. There will be fewer issues. Therefore, the area of the electrode 12 of the embodiment can be 100 times as large as that of the commonly used spot electrode 2 of 1 cmφ, and the level of the myoelectric signal is about 1 in the simple comparison under the same conditions with respect to the spot electrode 2. You can expect to be / 10.

With such an electrode arrangement of the left and right shoulders and the entire left flank, the expected waveform of the electromotive force of the electrocardiographic signal source is different from that of the ordinary spot electrode 2, so the obtained waveform is slightly different. There is no problem in measuring the heart rate, and in the case of waveform diagnosis, it can be solved by making a diagnostic algorithm suitable for it.

The present invention is not limited to the above embodiment,
Various modifications are possible. FIG. 5 is the underwear shown in FIG.
It is a figure showing a case where an underwear equivalent to 10 is easily realized, which is due to the structure of a so-called "jacket garment". In the figure, the same parts as those in FIG. 1 are denoted by the same reference numerals. In the figure, reference numeral 30 designates a gown, which has a neck hole 31 through which a wearer's head is passed at a substantially central portion thereof, and a neck is put thereinto and worn. 32 is a knot which ties the front and back after wearing and binds them tightly.
Electrodes 12 are made for LA and RA for the side of the neck hole 12, and LL is provided at the front left end. No. 6 wearing the underwear style underwear
Shown in the figure. Although the figure does not require any particular explanation, it can be worn quite tightly by tying the front and back with a tie 32.

In addition, by combining things such as a belt or a supporter, it is possible to realize underwear with many degrees of freedom. Very simply, the electrode cloth (large area electrode) may be attached by a rubber belt 35 as shown in FIG.

FIG. 8 shows a part of the circuit of the telemeter transmitter main body 1 of FIG. This circuit is an example of a circuit in which the battery B turns on when the hook 15 is stopped and turns off when the hook 15 is removed. The operation of the circuit will be briefly described, and detailed description of each component will not be given.

The μPU, which is a low-power computer, wears the undergarment 10 and stops the hook 15 of the pocket 11 through the hook hole 21 to turn on the battery and leave the power on. In this case, the hook hole 21 shown in FIG. 3 may be increased by one. Then, it is turned "ON" by adding the signal of OD ₁ from the output port to the gate of Q ₁ which is an N-channel depletion type MOS FET every few seconds (5-10 seconds) by the built-in ROM program. And check if the device is in use. That is, when a living body exists between RA, LA, and LL, the impedance between them is small, and therefore the outputs of the amplifiers A ₁ and A ₂ and the reference bias of the input of the amplifier A ₄ have almost the same DC potential. Enter this as port ID ₃ ,
Judgment is made in ID ₆ and ID _{8 and} it is determined whether FETQ ₁ is kept in the “on” state or turned “off” and executed. This time sequence is shown in FIG. In the figure, (a) is a diagram showing the input voltage waveform due to OD ₁ from the μPU to the gate of FET Q ₁ , and (b) is a diagram showing the voltage value on the source side of FET Q ₁ ,
(C) The figure shows the voltage values of ID ₃ and ID ₆ to the input port of μPU. The μPU applies a voltage to the gate of FET Q ₁ at 5-10 second intervals. Due to this gate voltage, FET Q ₁ becomes conductive and the source voltage + V _CC rises as shown in (b). RA, LA, L
When there is a living body between L, ID ₃ and ID ₆ also rise, the output voltage of the output port OD ₁ of μPU is maintained, and FETQ ₁ continues to operate, so + V _CC also keeps rising as shown by the solid line in the figure. Thus, the device is kept in operation and sends an electrocardiographic signal. If there is no living body between LA, RA, LL, ID ₃ and ID ₆ will be as shown by the dotted line in (c), and therefore OD _{1 in} (a) and + V in (b).
_CC also decreases and the device does not enter the operating state, and transmission is not performed.

(Effect of the invention) As described in detail above, according to the present invention, the subject himself can easily handle it, and the deterioration of the SN ratio due to the mixing of myoelectric signals is also improved. large.

[Brief description of the drawings]

1 is an external view of an embodiment of the present invention, FIG. 2 is a sectional view of a pocket portion, FIG. 3 is a schematic structural view of a telemeter transmitter main body, and FIG. 4 is a telemeter transmitter in the pocket of FIG. FIG. 5 is a view of another embodiment of the present invention, FIG. 6 is a view of the underwear wearing state of FIG. 5, and FIG. 7 is a view of another embodiment of the present invention. FIG. 8 is a part of the circuit diagram of the main body of the telemeter transmitter used in the embodiment of the present invention, FIG. 9 is a time chart of the operation of the circuit of FIG. 8, and FIG. FIG. 1 …… Telemeter transmitter body 2,12 …… Electrodes, 3 …… Lead wire 10 …… Underwear with electrodes and pockets 11 …… Pockets, 13 …… Underwear cloth 15 …… Hooks, 16 …… Outer casing 17… … Circuit board, 18 …… Battery 19 …… Circuit parts, 20 …… Tab 21 …… Hook hole, 22 …… Connecting plate 30 …… Sleep coat, 31 …… Neck hole 32 …… Knot, 35 …… belt

Claims (13)

(57) [Claims] 1. A plurality of electrodes embedded in a required portion used for collecting an electrocardiographic signal from a subject, lead wires connected to the electrodes, and converting the collected electrocardiographic signal into an electromagnetic wave. And a telemeter transmitter main body for transmitting to a telemeter receiver, a conductor plate having a plurality of holes in the center attached to a tab provided on the upper part of the telemeter transmitter main body, and the telemeter transmitter main body Biological signal collection, which comprises an undergarment having a housing means for housing the telemeter transmitter body, which includes a hook connected to the lead wire used for enclosing Transmission equipment. 2. A telemeter transmitter main body is housed in an underwear housing means, and the telemeter transmitter main body is powered by stopping by inserting a hook of the housing means into a hole row at a tip of a tab of the telemeter transmitter main body. Claim 1
The biological signal collecting and transmitting apparatus described. 3. The biological signal collecting and transmitting apparatus according to claim 1, wherein the telemeter transmitter main body is of a completely sealed type and is made disposable by exhaustion of a battery which is a power source thereof. 4. The biological signal collecting and transmitting apparatus according to claim 1, wherein the power source of the telemeter transmitter main body is a rechargeable battery. 5. An electrode attached to the underwear is in contact with the inner surface of the underwear, and is provided at least at three places on the left and right shoulders and on either the left or right flank for collecting electrocardiographic signals for limb induction. The biological signal collecting and transmitting apparatus according to claim 1, wherein the biological signal collecting and transmitting apparatus is capable of making electrical contact over a large area. 6. The biological signal collecting and transmitting apparatus according to claim 5, wherein a conductor fiber is woven or mixed into the cloth on the inner surface of the underwear to form an electrode. 7. The biological signal collecting and transmitting apparatus according to claim 6, wherein carbon fiber is used as a material of the electrode woven into or mixed with the underwear. 8. The cloth for making underwear is stretchable and elastic,
The biological signal collecting and transmitting apparatus according to claim 6 or 7, wherein the biological signal collecting and transmitting apparatus comes into close contact with a wearer. 9. The biological signal collecting and transmitting apparatus according to claim 6 or 7, wherein the cloth for making the underwear is a non-woven fabric. 10. The biological signal collecting and transmitting apparatus according to claim 6 or 7, characterized in that, except for a means for wearing, the portion other than the conductive fibers used for the electrodes does not use much cloth. 11. The biological signal collecting and transmitting apparatus according to claim 8, wherein the electrode is brought into close contact with the wearer by a mounting means such as a supporter or a belt. 12. The biological signal collecting and transmitting apparatus according to claim 6 or 7, wherein the electrode has hydrophilicity so as to improve conductivity due to perspiration of the subject. 13. The biological signal collecting and transmitting apparatus according to claim 1, 5, 6 or 7, wherein the underwear having the telemeter transmitter main body accommodating means and the electrode has a structure of a cloak.