JP2007195837A - Detecting device of lying prone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for detecting that a person lies prone having a simple constitution, facilitating the attachment of a detecting sensor and a determination, and providing a correct determination. <P>SOLUTION: A thin-film container contains conductive liquid with the volume almost half of its volume sealed therein, has a plurality of high-frequency transmission sections transmitting or stopping an electric wave according to the inclination degree of conductive liquid, and is stuck to the forehead or the chest region surface of an infant or the disabled. This detecting device receives the electric wave transmitted by the plurality of high-frequency transmission section through a receiving section, determines whether the person to be monitored lies prone or not according to the receiving state, and allows the receiving section to output an alarm when the person lies prone for a preset time or more. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a prone detection device that detects proneness of infants and physically disabled persons and prevents accidents due to suffocation.

If an infant or a handicapped person accidentally falls down and cannot turn over with his own power, the mouth and nasal cavity may be blocked by bedding, etc., resulting in a choking accident. Even a small amount of time can be a serious accident, but in large hospitals and facilities it is not easy for nurses to continue to monitor many inpatients.

In response to the above problems, a number of proposals have been submitted for sensors for mats and pillows, monitoring with a surveillance camera, and detecting proneness. (See Patent Document 1 and Patent Document 2)
Patent Publication 2004-212053 Patent Publication 2005-312901

In Patent Document 1, a resonance tag (also referred to as an IC tag, an electronic tag, or an RFID (Radio Frequency IDentification)) is attached to each part of a human being sleeping, and reception is received by receivers of resonance tags in various parts of the bed. This is a proposal to determine the posture of a person based on position and radio wave intensity.

When this proposal is used to detect the prone position of an infant, since the infant's head is small, the difference in the distance between the sleeping state and the prone state is small. Absent. In addition, considering the movement of the head, it is necessary to arrange a plurality of resonance tag receivers in vertical and horizontal planes, and the apparatus is complicated because it is necessary to comprehensively determine the prone position based on the plurality of resonance tag receivers. There is a problem that it is expensive.

Patent Document 2 is a proposal that attaches a load sensor and an acceleration sensor to a garment as a sensor for detecting prone, and when the sensor detects it, transmits a radio wave and transmits it to a receiver, and determines a prone in the receiver and issues an alarm. .

In this proposal, an acceleration sensor is used as a sensor to detect. However, since changes in breathing and pulse movements of infants must be taken into account, determination of proneness is complicated and expensive.
Further, although a load sensor is used, there is a case where the weight sensor is not always loaded because the weight is supported by an arm or the like, and may not be detected correctly.

The present invention is provided in order to solve the above-described difficulty that is complicated, expensive, or not correctly detected.

A thin film container is filled with about half the capacity of a conductive liquid, and a plurality of high-frequency transmitters that transmit or stop radio waves according to the gradient of the conductive liquid are attached to the thin film container. Affixed to the forehead or chest surface. Receives radio waves transmitted from multiple high-frequency transmitters at the receiver, determines whether the person being monitored is in a prone state according to the reception status, and alerts the receiver when the prone state has exceeded a preset time Is output.

The high frequency transmitter is attached to one plane of the thin film container, and two lead terminals are pasted in a shape that is open on the mounting surface side of the high frequency transmitter inside the thin film container. When both of the lead terminals are immersed in the conductive liquid, a means is provided in which the lead terminals are in a conductive state and the high frequency transmitter can transmit radio waves. When either or both of the lead terminals are not immersed in the conductive liquid, a means is provided for the high-frequency transmitter to not transmit radio waves.

If the thin film container is attached to the forehead or chest surface of the person to be monitored with the high-frequency transmission part facing down, all of the high-frequency transmission parts can transmit radio waves when the person to be monitored is prone. The receiving unit is provided with means for outputting an alarm when a predetermined time or more has elapsed since all radio wave transmissions have stopped. When the thin film container is attached to the forehead or chest surface of the person to be monitored with the high-frequency transmission unit facing upward, all the high-frequency transmission units transmit radio waves in the prone state. Means is provided for outputting an alarm when a predetermined time has elapsed since the start of reception of all radio waves.

Since the present invention is simple in construction and easy to install the detection sensor, and can easily determine the prone position, it can prevent a choking accident even if it is not constantly monitored.

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration of a receiving unit of a prone detection device and a high-frequency transmitting unit attached to a thin film container.
The thin film container (3) is filled with the conductive liquid (4) in an amount of about half of the capacity, and the conductive liquid (4) moves inside depending on the inclination state of the thin film container (3). ing.

FIG. 1 shows that the high-frequency transmitter (1 and 2) is attached to the forehead or chest surface of the monitored person in a state of being attached to the lower side of the thin film container (3). In this state, the lead terminals (5) of the high-frequency transmitter (1) and the high-frequency transmitter (2) are immersed in the conductive liquid (4), so that the lead terminals are electrically connected. ing.

When the two lead terminals (5) are in a conductive state, the high frequency transmitter is designed to have a structure capable of transmitting radio waves (F1 and F2). For example, the conduction between the lead terminals (5) is designed as a switch of a power battery that operates the high-frequency transmission unit. Alternatively, the conduction between the lead terminals (5) is designed as a switch of a resonance circuit that oscillates a high frequency. Radio waves (F1 and F2) are transmitted intermittently in order to reduce power consumption.

The receiving unit (6) receives radio waves from the high-frequency transmitting units (1 and 2), and determines whether or not the prone state is in a prone state based on the radio wave transmission state. The radio wave received by the antenna (7) is detected and demodulated by the high frequency receiver (8) and transmitted to the prone determination unit (9). When it is determined that the prone state is determined by the prone determination unit (9), an alarm is output from the nurse call output unit (10) to an external device that notifies an alarm such as an alarm display, an alarm sound, and a nurse call master.

FIG. 2 shows a state in which the person to be monitored with the thin film container (3) is slightly inclined from the back.
In this state, since the lead terminals (5) of the high frequency transmitter (1) are immersed in the conductive liquid (4), the high frequency transmitter (1) transmits radio waves (F1). Since the space between the lead terminals (5) of the part (2) is not immersed, the high-frequency transmission part (2) does not transmit the radio wave (F2).

FIG. 3 shows a state in which the person to be monitored is lying down, and the high-frequency transmission unit (1) and the high-frequency transmission unit (2) both have radio waves (F1) because the lead terminal (5) is not immersed in the conductive liquid (4). ), (F2) cannot be sent. In the figure, x marks indicate that radio waves are not transmitted.

FIG. 4 is a time chart showing the radio wave output (F1 is 11 and F2 is 12) and the nurse call call output (13) as time taken on the horizontal axis, which are input to the prone determination unit (9).
The period of T1 (14) is a period in which the radio waves F1 and F2 are transmitted intermittently.
The period T2 (15) is a period during which F1 radio wave transmission is stopped but F2 is transmitted.
The period of T3 (16) is a period in which radio wave transmission is stopped for both F1 and F2, and when this preset time elapses, a warning display, a warning sound and a nurse call are output. The
If one or both of F1 and F2 emit radio waves before the set time, the timer for monitoring the alarm is reset and the progress is newly monitored.

FIG. 5 is a flowchart showing the determination operation of the prone determination unit (9).
The monitoring timer T3 is activated to start the prone monitoring state. (Step S2)
When there is an output of the radio wave F1 or F2 (step 3, step 4), the monitoring timer T3 is reset (step 6) and monitoring is continued.

When the outputs of F1 and F2 are lost and the monitoring timer T3 exceeds the preset time (Tup) (step S5), the nurse call call output, the alarm display lights / flashes, the alarm sounds, and the monitoring timer T3 stops operating. Is done. (Step S7)
The alarm state is maintained until the recovery button for recovering the alarm is pressed (step S8), and when the recovery button is pressed, the alarm is canceled (step S9) and the monitoring state is returned again.

In FIG. 1, two high-frequency transmission units are shown, but the principle is the same for three or more units. Moreover, although the case where the high-frequency transmission unit is located on the lower side of the thin film container is illustrated in the supine state, it is needless to say that even if the upper side is in the supine state, radio wave transmission conditions change, but monitoring can be performed in the same manner.

It is desirable that the thin film container be as thin as possible. This is because it does not give a sense of incongruity when the subject's skin is hurt or prone. It is desirable that the battery is a film battery and can be easily replaced. The high-frequency transmitter must be manufactured in a very small size and must be a weak radio wave that does not adversely affect the person being monitored or the medical device.

When monitoring multiple monitored persons at the same time, a code for identifying the monitored persons is added to the signal to be transmitted, and a method for identifying the individual at the receiving unit that receives the code, or for each individual monitored person There is a method in which a high-frequency frequency is set to a different frequency and an individual is identified based on the frequency at the receiving unit.

Configuration of the receiver of the prone detection device and the high-frequency transmitter attached to the thin film container The thin film container with the thin film container attached to the person being monitored is slightly inclined from the back Thin film container with the person being monitored lying down Time chart of radio wave output and nurse call call output Flow chart of determination operation of prone determination unit

Explanation of symbols

1.
High frequency transmitter 1
2.
High frequency transmitter 2
3.
Thin film container
Four.
Conductive liquid
Five.
Lead terminal
6.
Prone detection device receiver
7.
antenna
8.
High frequency receiver
9.
Prone determination part
10. Nurse call output
11. High frequency F1 transmission output
12. High frequency F2 transmission output
13. Nurse call call output
14. Time zone when high frequency F1 and F2 are transmitted
15. Time period when only high frequency F2 is transmitted
16. Time period when neither high frequency F1 nor F2 is transmitted

Claims (3)

The thin film container in which a conductive liquid is sealed in the container in an amount of about half of the capacity of the thin film container, and a plurality of high frequency transmitters that transmit radio high frequency waves attached to the outside of the container on one flat surface side of the thin film container; A reception unit that receives radio waves transmitted from the high-frequency transmission unit, and
The thin film container is affixed to the forehead or chest surface of the head of an infant or handicapped person, and two lead terminals are introduced into the thin film container, and the high frequency transmitter is attached to each of the high frequency transmitters. When the one side of the lead terminal is opened inside the plane of the thin film container, and the conductive liquid contacts the two lead terminals at the same time in the high-frequency transmitter, the contact corresponds to the contact A high-frequency transmission unit periodically transmits a radio wave of a preset frequency, determines a prone state in the reception unit based on a radio wave transmission state of a plurality of the high-frequency transmission units, and externally when it is determined as a prone state Alternatively, the prone detection device is characterized in that an alarm is issued by the receiver. When the thin film container is affixed to the forehead or chest surface of the head of an infant or a handicapped person with the side on which the high-frequency transmission unit is attached facing down, a plurality of thin film containers attached to one plane side of the thin film container Claims that the prone state is continued when a preset time has elapsed after all radio wave transmission of the high-frequency transmission unit is stopped, and outputs an alarm outside the reception unit or the reception unit itself. The prone detection device according to 1. When the thin film container is attached to the forehead or chest surface of the head of an infant or a handicapped person with the side on which the high-frequency transmission unit is attached facing upward, a plurality of thin film containers attached to one side of the flat surface of the thin film container Claims that the prone state continues when a preset time has elapsed after all the radio wave transmissions of the high-frequency transmission unit have been transmitted, and outputs an alarm outside the reception unit or the reception unit itself. The prone detection device according to 1.