JPS6024410A - Attitude detecting device - Google Patents

Abstract

PURPOSE:To detect the change in attitude of a body in detail by a very simple constitution, by freely rotating the contact point of a ball with a hysteresis characteristic, in a recess surrounded by a plurality of contact pins. CONSTITUTION:A contact base 2, which has insulating property and eight contact pins 5-12, is coupled to an opening part of a cylindrical housing 1 with insulating property. A conductive ball 4 is held in a recess part 3B formed by the housing 1 and the contact base 2. Any two pieces of the pins are always contacted with the ball and a circuit is formed. When the device is inclined by the change in attitude of a body in the circumferential direction and the center of gravity of the ball 4 exceeds the part between the pins 5-12, a current is conducted between the pins 12 and 11 under the closed state, and the ball 4 is moved with a hysteresis characteristic. When the device is changed in back and forth, the hysteresis characteristic is provided at the outside of inside of a peripheral part 3C. Therefore, the change in attitude of the body can be detected in detail at every specified angle by a simple, closed structure, and the device can be used in all of the environmental conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a posture detection device for diagnosing heart disease by providing body position information to electrocardiogram information.

Conventional cane surgery Traditionally, in the diagnosis of ischemic heart diseases such as angina pectoris and myocardial infarction, devices that can continuously monitor or record electrocardiograms for long periods of time, such as tape electrocardiographs or bedside monitors, have been used. A diagnosis is being made. However, the 5T-T change, which is a waveform change that can be diagnosed as angina pectoris, on an electrocardiogram also occurs due to factors other than angina, such as changes in the subject's body position, so the above device alone is not suitable. There was a problem that made it impossible to make an accurate diagnosis. During long-term continuous electrocardiogram measurements, the subject was able to carry out daily activities with almost no disability, and was constantly changing body positions and repeating various movements, so a 5T-T change was observed on the electrocardiogram. However, it is not possible to easily diagnose angina pectoris.

Therefore, in order to make an accurate diagnosis, it is necessary to investigate the effects of changes in the subject's body position and movements on the electrocardiogram waveform.

Up until now, devices for detecting changes in the body position of a subject as described above have been constructed using a conductive liquid such as mercury and a plurality of electrodes that are electrically short-circuited by the conductive liquid in a sealed housing. A configuration has been proposed in which a change in body position is detected based on the conduction state of the plurality of electrodes caused by a conductive liquid that moves as the body position changes.

However, in the conventional attitude detection device as mentioned above,
Since changes in body position are detected only by conduction and non-conduction of the electrodes, there is a drawback that the state of the change cannot be known in detail. In addition, the structure is complicated, and manufacturing is troublesome because mercury or the like is sealed as a conductive liquid.Moreover, this mercury oxidizes, so it is necessary to periodically replace it, which is inconvenient. Furthermore, since it uses mercury, it has problems such as being sensitive to heat.

Purpose of the Invention The present invention has been made in view of the above-mentioned problems, and its purpose is to propose a posture detection device that has an extremely simple configuration, can detect changes in body position in detail, and is easy to manufacture and handle. It's about doing.

Another object of the present invention is to propose an attitude detection device that can perform extremely detailed attitude detection without complicating the configuration.

EXAMPLES Hereinafter, the present invention will be described in detail using drawings showing preferred examples.

FIG. 1 is a perspective view of a posture detection device according to an embodiment of the present invention. 1 in the figure is the thickness t due to the insulator such as plastic.
2 is a disc-shaped contact base made of an insulating material such as plastic that fits integrally into the opening of the housing l, and is spaced at 45 degree intervals near the periphery. Eight contact bins 5 to 12 are provided as shown. A contact pin receiver part 3A having eight holes 3A into which one ends of the contact pins 5 to 12 of the contact base 2 are fitted is formed at the bottom of the housing l. Reference numeral 4 denotes a movable pitching point having a predetermined diameter and having at least a surface made of a conductive member such as metal. The surfaces of the ball core point 4 and the contact pins 5 to 12 are plated with gold to reduce oxidation and contact resistance.

The attitude detection device is constructed by fitting and fixing the contact base 2 into the opening of the housing l with the spherical core point 4 disposed inside the contact pins 5 to 12.

FIGS. 2(A) and 2(B) are a plan view and a side view of the attitude detection device, respectively. Note that the contact portion is sealed by the housing l and the contact base 2. Also, Figures 1 and 2 (
As shown in FIG. 2(C), which is a cross-sectional view taken along line A-A in FIG. A recessed portion 3B having a curved surface is formed around a. This recessed portion 3B is formed a distance A inward from the positions of the contact pins 5 to 12. Next, the spherical nucleus point 4 is located at B-B in Fig. 2 (B).
As shown in FIG. 2(D), which is a cross-sectional view of the line, the contact pin 5
-12, and freely rotates within the contact bins 5-12. In addition, as can be seen from FIG. 2(C), the range in which the spherical core point 4 can rotate while contacting within the contact bins 5 to 12 is the range of the mutual spacing between the edge portions 3C around the recessed portion 3B. There is.

Next, the operation of this attitude detection device will be explained using FIGS. 3(A) to 3(F).

First, it is assumed that the spherical nucleus point 4 is located between the contact pins 5 and 12 as shown in FIG. 3(A). At this time, the ball core point 4 is in contact with both of the contact pins 5 and 12 due to its own weight, so the ball core point 4 forms a conductive path between the contact pins 5 and 12. In other words, a closed state called a switch is formed.

FIG. 3(B) shows a state in which the device is tilted laterally to the right by n1 degrees due to a change in body position. In this state, since the center of gravity P of the spherical nucleus point 4 is located between the contact pins 5 and 12, the spherical nucleus point 4
, the state shown in FIG. 3(A) is maintained without rotationally moving toward the contact pin 11.

Next, as shown in FIG. 3(C), the device further tilts laterally to the right, and when the device tilts by a certain angle xi as shown in the figure, the center of gravity IF of the ball nucleus point 4 moves to the side between the contact pins 12 and 11. To do this, the ball nucleus point 4 is rotated between the contact pins 12.11. Then, the contact pins 5 and 12 are in an open state, and the contact pins 12 and 11 are in a closed state (conducting path). In this manner, the spherical core point 4 moves with hysteresis characteristics in accordance with the tilt of the device, and the connection state between the contact point bins 5 to 12 changes sequentially. Note that the inclination angle (hysteresis angle) at which the spherical nucleus point 4 starts moving between the next contact bins can be arbitrarily determined depending on the distance between the contact bins and the diameter of the spherical nucleus point 4.

Next, a case where the device is tilted in the vertical direction will be explained.

When the device is tilted from the state shown in FIG. 3(D) to the right by n2 degrees as shown in FIG. As a result, the ball contact 4 is supported by the edge portion 3C and kept in contact with the contact pin.

Furthermore, the device operates at a constant angle x2 (
x2>n2), the center of gravity P of the ball contact 4 moves to the outside of the edge portion 3C, so the ball contact 4 has hysteresis characteristics and climbs over the edge portion 3C to form the recessed portion 3B.
Roll to the side. Therefore, the ball contact 4 is out of contact with the contact pins 5 to 12. Further, when the tilt of the device returns to its original state by more than a certain angle, the ball contact 4 moves from the recessed portion 3B to the contact pin side. The inclination angle x2 (hysteresis angle) leading to this non-contact state is the height A from the contact pin to the edge portion 3C and the edge portion 3
The hysteresis angle from the non-contact state to the contact state is determined by the depth a of the recessed portion 3B and the diameter of the ball contact 4.

For example, eight resistors R1 to R8 constituting an oscillation circuit of a posture detection circuit, which will be described later, are connected between the contact pins 5 to 12 of the posture detection t11 device configured and operated as described above. The resistance value changes depending on the contact position of the ball contact 4 with the contact pin 4 and whether the contact state or non-contact state occurs, and a change in body position is detected from the oscillation frequency that changes based on the change in the resistance value. This makes it possible to detect changes in body position at every fixed angle. Note that the attitude detection device mentioned above has contact pins 5 to 5 protruding outward from the contact base 2.
By using the portion 12, it can be directly connected to the printed circuit board.

In addition, the entire device has a hermetically sealed structure and is resistant to heat, so it can be cleaned after mounting on a printed circuit board, and can also be partially attached using a solder bath, eliminating mounting restrictions.

Therefore, the entire device can be miniaturized extremely easily, and the posture detection device is easy to implement.

The posture detection device described above can only detect the body position according to the distance between the contact pins contacted by the ball contact 4 and the hysteresis angle determined by the ball contact 4, but the following configuration In this case, the posture detection device can perform posture detection with even higher accuracy (details) without changing the structure of the posture detection device itself.

That is, as shown in FIG. 4, a device having contact pins 5 to 12 at 45 degree intervals and a device having contact pins 5' to 12' at 45 degree intervals are arranged with an angular difference of 22.5 degrees. If they are installed in parallel, the two devices can be used to create a device similar to that in which contact pins are provided at 22.5 degree intervals, making it possible to detect the body position in more detail. and,
Similarly, it will be easily understood that if n devices are installed with an angular difference obtained by dividing the distance between the contact pins by n, the attitude can be detected with n times the accuracy.

As explained above, the posture detection device of this embodiment has been described using human body posture detection as an example, but this posture detection device is small and has a completely sealed structure, and also has excellent impact resistance. Therefore, it can easily be made into an explosion-proof structure, and there are almost no restrictions on the usage environment conditions. This is because the case is made of an electrically insulating material that is heat resistant and corrosion resistant, making it possible to use it under any environmental conditions. Therefore, this posture detection device can be used for crane arms and various robots, etc. By installing this device, there are no restrictions on influence conditions, the displacement detection unit is miniaturized, and precise and accurate displacement can be detected. has become possible to detect.

FIG. 5(A) is a posture detection circuit diagram for detecting the body position based on the closed contact state from the posture detection device.

In the figure, 50 is an astable multivibrator, 52 is a power switch, and 53 is a power source. Terminals A-H correspond to contact pins 5 to 12 of the above-mentioned attitude detection device.

In this embodiment, 55 is used as the astable multivibrator 50.
5 timer is used. Therefore, the power supply 53 operates stably in the range of about 2 volts to 15 volts, and the current consumption is 1.
00gA or less.

The oscillation output waveform from the oscillation circuit is shown in FIG. 5(B). Fifth
T and T3 in the figure (B) change depending on the contact state of the attitude detection device, which will be described later, and are expressed by the following equation.

T,=C(RA+RB)In2-(1)T3=C
(RA+2RB)ln2・-・ (2) However, RB is RB
It is a combined resistance of 1-RB8.

Therefore, the oscillation frequency f of this oscillation circuit is f=1.44/((RA÷2RB)C)...(3
).

The oscillation output OUT of the astable multivibrator 50 is voltage-divided by resistors RC and RD, matched with the input level of an electrocardiogram recording device, etc., and output.

In the following circuit diagram, the end A of the attitude detection device is 5.12.
When the ball contact 4 is located between the terminals 5 and 12, the terminals 5 and 12 are in a closed state, and the terminals 5 and 12, that is, between A and H in FIG. 5(A) are electrically closed, and RB = R8. becomes. That is, the oscillation frequency f can be obtained by substituting R8 for RB in equation (3): f = 1.44/((RA÷2R8)C).

Next, due to the displacement of the attitude detection device, the ball contact 4 moves to the end 11.1.
2, terminals 11 and 12, that is, between G and H, are in a closed state, and RB=R1+R2+R3+R4+R5+R
6+R8.

As is clear from the above explanation, when the ball contact 4 is located between the terminals where the attitude detection device is located, the terminals A-B and B-
C, C-D, D-E, E-F.

An electrically closed contact state occurs between any of the terminals FG, GH, and HA, and by changing the resistance values of R1-R8, the combined resistance of RB will also change, and the oscillation frequency will change accordingly. will always change. By utilizing this correspondence between the oscillation frequency and the posture detection device, it is possible to make the device extremely compact and to easily adjust the body position.

In addition, as shown in Figure 4, if you want to measure the body position more precisely using multiple posture detection devices, divide the resistance of RB by the number of contact bins from the posture detection devices, and set each resistance value to different values. By doing so, the oscillation frequency can be changed.

Effects As described above, according to the present invention, changes in body position can be detected in detail at every fixed angle. Moreover, the structure is extremely simple and manufacturing is also extremely easy. The movable body does not oxidize like mercury and is resistant to heat, so it is extremely easy to handle.

Furthermore, if multiple devices are installed with each electrode shifted by a certain angle, the device will have multiple times as many electrodes, so more detailed posture detection will be possible without changing the configuration of each device. It becomes possible.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a posture detection device according to an embodiment of the present invention, and FIGS. 2A and 2B are a plan view and a top view of the posture detection device shown in FIG. 1, respectively. Side view. FIGS. 2(C) and 2(D) are sectional views taken along the line AA in FIG. 2(A) and the line BB in FIG. 2(B), respectively. 3(A) to 3(F) are sectional views for explaining the operation of the attitude detecting device, FIG. 4 is a plan view of an embodiment of the attitude detecting device according to another explanation, and FIG. ) is an attitude detection circuit diagram of the attitude detection device, and FIG. 5(B) is an output waveform diagram of the attitude detection circuit. Here, 1...housing, 2...ta point
3...Contact pin holder part, 3B...Recessed part, 4...
... Spherical nucleus points, 5 to 12 ... Contact bins. Procedural amendment September 13, 1980 Director General of the Patent Office 1, >1G Indication Patent Application No. 132560/1982 2 Title of the invention Posture Detection Device 3 Relationship with the person making the amendment Case Patent applicant Mutsuyoshi Mizui 4, Agent 1-11-10 5 Toranomon, Minato-ku, Tokyo 105, Date of amendment order 6, Column for detailed explanation of the invention in the specification subject to amendment and drawings (see Figure 2) D)
)-/”!, ＼ 7. Contents of amendment (1) Specification cylinder page 16, line 5, rRB1-RB8J
Rl-R8” is corrected. (2) For drawings, reference number “2” in Figure 2 (D)
is corrected to "12". A copy of the drawing with reference numbers corrected in red is attached. Procedural amendment document February 7, 1980, Commissioner of the Japan Patent Office 1, Indication of the case, Patent Application No. 58-132560 2, Name of the invention Posture detection device 3, Person making the amendment Relationship with the case Patent applicant Mutsumi Mizuben Sho 4, Agent 1-2-12 Toranomon, Minato-ku, Tokyo 105 5, Date of amendment order 6, Subject of amendment 7, Contents of amendment Figures 3 (A), (B), ( C) Reference number [3
] to [4] and [4] to [3]. A copy of the drawing with reference numbers corrected in red is attached.

Claims (4)

[Claims] (1) A casing made of an insulating material, a plurality of electrodes provided circumferentially at regular intervals within the casing, and electrodes of a predetermined depth provided on both sides of the electrodes within the casing. Hollow part and 1
, a movable body disposed between the electrodes and having at least a spherical surface made of a conductive member, the movable body simultaneously contacting two adjacent electrodes and hysteresis between the electrodes according to the inclination of the casing; 8. A movable body that reciprocates between the electrode and the recess with a hysteresis characteristic when moving with a characteristic, and switching a contact position of the movable body to the electrode and whether or not the movable body and the electrode are in contact with each other. An attitude detection device characterized by obtaining displacement information. . (2) The attitude detection device according to claim 1, wherein the electrode and the movable body are plated with gold. (3) The posture detection device according to claim 1, wherein the electrode and the movable body are sealed by a housing. (4) A casing made of an insulating material, a plurality of electrodes provided circumferentially at regular intervals within the casing, and a plurality of electrodes provided at a predetermined depth on both sides of the electrodes within the casing. A recessed portion;
A movable body disposed between the electrodes and having at least the surface formed into a spherical shape by a conductive member, the movable body being arranged between two adjacent electrodes.
A multi-position detection device comprising a movable body that simultaneously contacts the electrodes and moves between the electrodes with a hysteresis characteristic according to the inclination of the housing, and reciprocates between the electrodes and the recess with a hysteresis characteristic.゛: An attitude detection device characterized in that the L pole position is shifted by a predetermined angle and installed in parallel to enable more accurate attitude detection.