JPH0584856U - Ultrasonic bedwetting sensor - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides an ultrasonic bedwetting sensor that detects the size of the bladder accumulating urine by ultrasonic waves and issues an alarm. [Structure] An ultrasonic transducer 3 is adhered to the body surface of the body 1 near the bladder 2, and when a pulse signal is transmitted from the transmitter 4 to the ultrasonic transducer 3, ultrasonic waves are transmitted from the ultrasonic transducer 3 to the body. Is fired inside. Here, the reflected wave that is reflected by the wall of the bladder 2 through the urine becomes a high level signal and is detected by the ultrasonic transducer 3. Since the time to be detected differs depending on whether or not the time is set by the gate circuit 7, and a high level signal is detected from the signal passing through the gate circuit 7,
When this high level signal is detected, the alarm device 8 is activated. Thereby, for example, bedwetting can be prevented by taking the child to the toilet by the parent or by the person who cares for the elderly to the toilet.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an ultrasonic bedwetting sensor that detects the size of the bladder by ultrasonic waves as the size of the bladder changes depending on the amount of urine accumulated in the bladder.

[0002]

[Prior Art]

 When a child is bedtting, she is tired from exercise and play during the daytime while she is sleeping, and she usually leaks urine when she notices it without drowsiness even when she accumulates in her bladder.

In addition, elderly people with physical disabilities may have bedwetting due to the accumulation of urine before they notice it.

[0004]

[Problems to be solved by the device]

 Therefore, it is sufficient to detect whether urine has accumulated while sleeping, but conventionally there is no good way to detect whether urine has accumulated in the bladder to the extent that urine leaks. A means to give is desired.

[0005]

[Means for Solving the Problems]

 The present invention is an ultrasonic transducer mounted on the body surface near the bladder, a transmitter that outputs a pulse signal to the ultrasonic transducer, and a reflected wave of ultrasonic waves emitted by the ultrasonic transducer. A gate circuit that opens the specified signal after a predetermined time has elapsed, a level detection circuit that determines whether or not a signal that has passed a predetermined level and is input to the signal that has passed through the gate circuit, and the level detection circuit. The circuit consists of an alarm device that issues an alarm when a signal above a predetermined level is input.

[0006]

[Action]

 In the present invention, when an ultrasonic transducer is attached to the body surface in the vicinity of the bladder and an ultrasonic wave is emitted from the ultrasonic transducer, the reflected wave signal of the received ultrasonic wave is reflected by tissue in the body arbitrarily. Although the reflected ultrasonic waves are input, no reflected ultrasonic waves are detected from the urine in the bladder, and the reflected ultrasonic waves reflected by the wall of the bladder through the urine are more severe than other reflected waves. Detected at a high level.

Therefore, the ultrasonic wave is emitted in the vicinity of the bladder, and a high level of the signal passing through this gate circuit is passed through a gate circuit that covers the time when a high level reflected wave is detected from the bladder enlarged by urine. When the level is detected by the level detection circuit, the alarm can be activated to prevent parents from hearing the signal and taking the child to the toilet to prevent bedwetting, and even when the elderly are cared for. People who hear the alarm can take the elderly to the toilet early to prevent bedwetting.

[0008]

【Example】

 First, explaining the principle, as shown in FIG. 1, ultrasonic waves are emitted from an ultrasonic transducer 3 mounted near the bladder 2 of the body 1, and the reflected wave is displayed. As shown in Fig. 5, the reflected waveform A1 from the vicinity of the surface of the body 1 is a waveform with many low-level irregularities for the bladder 2a with less urine, and as shown by the waveform A2, reflection from urine is shown. There are no waves, and since the amount of urine in the bladder 2a is small, the time is short.

Then, a high level waveform A3 is displayed after the waveform A2, and then a low level waveform A4 is displayed.

Further, when ultrasonic waves are emitted to the bladder 2b with a large amount of urine, the reflected waveform 2 is a reflected wave from the vicinity of the body surface because the bladder 2b is large and tissue on the body surface is compressed. The waveform 2B1 is short and the bladder 2b is large as shown in FIG. 1. Therefore, the waveform B2 with no reflected wave is displayed long, and the high level waveform B3 appears after the waveform B2. Is followed by a low level waveform B4.

Here, comparing the waveforms A and B, since the high-level waveforms A3 and B3 are displayed at different times depending on the size of the bladder 2, as shown in the waveform C, a high level waveform is displayed. The gate is opened at the time when the waveform B3 is detected, and further, if it is detected whether or not there is a high level signal in the signal that has passed through the opened gate, it is before urine is accumulated in the bladder 2 and wetting the bed. Can be detected.

FIG. 3 is a block diagram of an ultrasonic bedwetting sensor according to an embodiment of the present invention. A transmitter 4 is connected to an ultrasonic transducer 3 mounted on the body surface of the body 1 near the bladder 2. A control device 5 such as a CPU is connected to the transmitter 4.

Further, a receiver 6 is connected to the ultrasonic transducer 3, a gate circuit 7 is connected to the receiver 6, and a level detection circuit 8 is connected to the gate circuit 7 and the level detection circuit 8 is connected. The alarm device 9 is connected to.

In the ultrasonic bedwetting sensor of the present embodiment configured as described above, when a signal is sent from the control device 5 to the transmitter 4, a pulse signal is sent from the transmitter 4 to the ultrasonic transducer 3 and the ultrasonic wave is transmitted. Ultrasonic waves are emitted from the oscillator 3 toward the bladder 2 of the body 1.

The reflected wave of the ultrasonic wave reflected in the body 1 is received by the ultrasonic transducer 3, amplified by the receiver 6, passed through the gate circuit 7, and input to the level detection circuit 8.

Here, in the case of the waveform A of FIG. 2, since the gate circuit 7 is opened for a longer time than the time when the high level waveform A3 is detected, it is high for the signal passing through the level detection circuit 7. The level waveform A3 is not included, and the level detection circuit 8 does not detect the waveform A3.

When the urine gradually accumulates and the bladder 2 swells, the signal passing through the level detection circuit 7 includes the high-level waveform B3, so that the level detection circuit 8 detects the high-level waveform. By operating the alarm 9 with this detection signal, it is possible to warn that urine has accumulated in the bladder 2.

In the ultrasonic bedwetting sensor according to the present embodiment, the size of the bladder 2 changes according to the amount of urine in this way, and the ultrasonic wave is reflected from the far wall of the ultrasonic transducer 3 of the bladder 2. The advantage of being able to prevent bedwetting by detecting the state in which the bladder 2 has grown due to accumulation of urine, focusing on the displacement of the high-level signal of the reflected wave of the ultrasonic waves There is.

[0019]

[Effect of the device]

 As described above, the ultrasonic bedwetting sensor of the present invention focuses on the fact that the size of the bladder changes depending on the amount of urine, and when the bladder grows in size, it is highly reflected from the wall of the bladder. By detecting the reflected wave and issuing an alarm to notify, the parent can take the child to the toilet before bedwetting, prevent bedwetting in advance, and even in the case of elderly people. However, there is an advantage that the caregiver can take the elderly person to the toilet early with an alarm sound and prevent bedwetting.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a body for explaining the principle of the present invention.

FIG. 2 is a waveform diagram of reflected waves of ultrasonic waves reflected from the bladder of the body of FIG.

FIG. 3 is a block diagram of an ultrasonic bedwetting sensor according to an embodiment of the present invention.

[Explanation of symbols]

 1 body 2 bladder 3 ultrasonic transducer 4 transmitter 5 controller 6 receiver 7 gate circuit 8 level detection circuit 9 alarm device

Claims (1)

[Scope of utility model registration request] 1. An ultrasonic transducer mounted on a body surface near the bladder, a transmitter for outputting a pulse signal to the ultrasonic transducer, and a reflected wave of ultrasonic waves emitted by the ultrasonic transducer. A gate circuit that opens a received signal when a predetermined time has passed, a level detection circuit that determines whether or not a signal having a predetermined level or higher is input to the signal that has passed through the gate circuit, and the level detection circuit An ultrasonic bedwetting sensor, which comprises an alarm device for issuing an alarm when a signal having a level equal to or higher than a predetermined level is input to the circuit.