JPH01121422A - Detector for working condition of toilet - Google Patents

Abstract

PURPOSE: To reliably and stably perform detection by installing two pyroelectric type infrared ray sensors for detecting a change of heat generated from a human body, near a toilet entrance and judging the presence of a user by time lag of signals obtained when the human body passes between the sensors. CONSTITUTION: A human body detecting sensor part 3 is composed of two pyroelectric type infrared ray sensors, one of the pyroelectric type infrared ray sensors is constituted of an entrance side sensor 6 attached to the wall surface on a handle 4 side of an entrance door 2 of a toilet room 1, and the other one is constituted of an indoor side sensor 7 attached to a position very close to the entrance door 2. Two set of output signals of the pyroelectric type infrared ray sensors are input to a human body detecting means, and whether a user is in a toilet room 1 or not is judged from time lag of two set of input signals. Since the using state is judged by judging the presence of the user in the room 1 by the human body detecting sensor part 3, the using state can be reliably and stably detected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a toilet usage state detection device for detecting the presence of a human body in a toilet room.

Conventional technology Conventionally, toilet usage state detection devices for detecting the use of a toilet have been published in specific literature, and although it is not possible to cite examples of such devices, there has been a general human body detection device using a pyroelectric infrared sensor. A detection device is used to detect the movement of the human body by using a single pyroelectric infrared sensor to detect the amount of change in infrared light that changes due to the movement of the human body, and then a timer process is performed. It was designed to detect human bodies.

Problems to be Solved by the Invention However, since the conventional human body detection device described above detects only the movement of the human body, it is difficult to detect a human body in a toilet room that is not moving or is moving only slightly. Therefore, there was a problem in that it was impossible to determine whether or not there was a toilet user in the toilet room.

In order to solve the above-mentioned problems, the present invention detects when a toilet user enters the toilet room or leaves the toilet room. An object of the present invention is to provide a toilet usage state detection device that determines the presence of a toilet.

Means for Solving the Problems In order to achieve the above object, the toilet usage state detection device of the present invention uses pyroelectric infrared rays to detect changes in heat generated by the human body of a toilet user who enters a toilet room. sensor,
There are two human body detection sensors installed near the entrance of the toilet room, parallel to the direction of travel of the toilet user, and two human body detection sensors that are installed when the toilet user crosses these human body detection sensor units.
9) A toilet occupancy state detection device comprising: 9) human body determination means for determining the presence of a toilet user in a toilet room based on the time lag between the signals generated by the respective pyroelectric infrared sensors; It is structured as follows.

Function: With this configuration, the human body detection sensor section detects a toilet user entering and exiting the toilet room, and based on the detection result, the human body determination means is used to determine whether the toilet user is entering the toilet room or leaving the toilet room. Determine whether there is a toilet user among the users.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 6.

In FIGS. 1(a) and 1(b), 1 is a toilet room. The human body detection sensor section 3 consists of two pyroelectric infrared sensors, one of which is mounted on the wall on the side of the handle 4 of the entrance door 2 of the toilet room 1, as shown in the front view of FIG. 1(a). The other one is installed at a position very close to the entrance door 2 in the toilet room 1, as shown in the side view of Figure 1 (b). It is designed to detect entry and exit from room 1.

FIG. 2 is a block diagram of the toilet occupancy state detection device, in which two sets of output signals from the two pyroelectric infrared sensors of the human body detection sensor section 3 are respectively input to the human body determination means 5, and the human body determination means 6, it is determined whether or not a toilet user is present in the toilet room 1 from the relationship between two sets of input power signals.

FIG. 3 is a diagram showing the principle of the human body detection sensor section 3.

As explained earlier, the sensor used in this human body detection sensor section 3 is a pyroelectric infrared sensor, which outputs a voltage signal in response to changes in body temperature (infrared rays) caused by the movement of the human body. This corresponds to the entrance side sensor 6 and indoor side sensor 7 shown in FIG. As shown in FIG. 3(a), these pyroelectric infrared sensors have an entrance side sensor 6 whose detection area is on the entrance door 2 side of the toilet room 1, and an indoor side sensor 7 whose detection area is the direction toward the interior of the toilet room 1. They are installed so as to form a detection area, and as shown in FIG. fixed at an angle. Here, since the pyroelectric infrared sensor 6.7 has a wide viewing angle, it is designed to detect a human body only when a toilet user crosses the front surface of the human body detection sensor section 3, as shown in Fig. 3 (a).
) is formed on the front surface of the sensor to narrow the viewing angle.

Next, the principle of detecting the state of use of the toilet will be explained with reference to FIG. Here, the human body detection signal of the human body detection sensor section 3 is Lo in a steady state, and Hi when a movement of the human body is detected.

First, FIG. 4(a) shows a state in which a toilet user opens the entrance door 2, or operates near the entrance with the entrance door 2 open.

As shown in the figure, only the entrance side sensor 6 reacts when the entrance door 2 is only opened. Next, FIG. 4(b) shows a case where a toilet user enters the toilet room 1. When a toilet user enters the toilet room 1, the entrance side sensor 6 detects the movement of the human body, and then the indoor side sensor 7 suddenly detects the movement of the human body, and in this one cycle, the toilet user's toilet entry into room 1 can be determined. In addition, as shown in the figure, the detection signal 91 of the entrance side sensor 6 is activated.
Start a 1 hour timer. When the human body detection signal of the indoor sensor 7 rises during this time tl, it is determined as room entry A, and accurate determination of room entry and prevention of malfunction due to noise or the like are made. Furthermore, after determining entry A, the timer is operated for t2 hours, and during this t2 time, each sensor 6.7
Prevents reception of human body detection signals. This is because when each part of the toilet user's body crosses the human body detection sensor unit 3, the entrance side sensor 6 and indoor side sensor 7 each emit a human body detection signal many times due to the time difference.
This is to prevent malfunctions such as when it is not possible to determine whether the number of people is present or whether a toilet user has entered the toilet room A even though the toilet user has entered the toilet room A. When the toilet user is moving inside the toilet room 1, only the indoor sensor 7 detects the movement of the toilet user. If the indoor sensor 7 is responding, it is considered that there is a toilet user in the room, so when the indoor signal rises, the presence in the room A1 to An is detected.
It can be determined that

Finally, the fourth diagram shows the case where the toilet user leaves the toilet room 1. As shown in the figure, when a toilet user leaves the toilet room 1, the indoor side sensor 7 first detects the toilet user's movement, and then the entrance side sensor 6 suddenly detects the toilet user's movement. Detect. In this one cycle, it is possible to decide whether to leave the toilet room 1 or 2.

In addition, as shown in the figure, when the room signal rises, a timer for t1 hour is activated, and when the human body detection signal of the entrance sensor 6 rises within the next hour, it is determined as leaving the room B, and leaving the room. accurate judgment and prevents malfunctions caused by noise. Furthermore, after determining that B has left the room, the timer is operated for time t, and during time t2, each sensor does not receive human body detection signals. This is to prevent malfunctions, as in the case of room entry determination in FIG. 4A.

As described above, the principle of toilet usage state detection focuses on the behavioral patterns of toilet users.

FIG. 6 shows an example of the circuit configuration of the essential parts of the toilet usage state detection device of the present invention. Here, the human body determining means 5 is composed of a microcomputer 1 and peripheral circuits. The microcomputer-1 shown here has a CPU, R
It is a so-called one-chip microcomputer that has an OM, a uAM, and an input/output section.

The output signals of the pyroelectric infrared sensors of the entrance side sensor 6 and the indoor side sensor 7 are respectively input to an amplifier 9 and amplified. Next, the output signals each amplified by the amplifier 9 are compared with a certain set voltage level by the comparator 1°, and if the output signal exceeds the set voltage level, it is configured to output a human body detection signal. ing. Furthermore, the human body detection signal output from each comparator 1o is configured to be input to a microcomputer 11.

Next, the operation of the toilet usage state detection device configured as described above will be explained. When a toilet user enters the toilet room 1, he opens the toilet door 2 and crosses the front of the human body detection sensor section 3 in the order of the entrance side sensor 6 and the room side sensor 7. Here, as shown in FIG. 4(b), first, after the entrance side sensor 6 of the human body detection sensor unit 3 detects the movement of the toilet user, the indoor side sensor 7 detects the movement of the toilet user within time tl. If detected, the microcomputer 11 determines that the room is in the room entry state (room entry A). Next, after the microcomputer 11 determines that the person has entered the room as shown in FIG. 6
If it detects the movement of the toilet user, the microcomputer 1 determines that the person is leaving the room (leaving B).
If the room side sensor 7 sends another human body detection signal to the microcomputer 1 within the time, the microcomputer 1 does not judge that the room has left the room, but returns to the room as shown in Fig. 4(b). The microcomputer 1 determines that the person has entered the room when the human body detection signal from the inner sensor 7 rises A1. This is because if the indoor sensor 7 emits a detection signal within a short time after the microcomputer 1 determines that the toilet user has left the room, it cannot generally be determined that the toilet user has left the room. This is to prevent malfunctions due to erroneous detection by each sensor. When the toilet user actually leaves the toy room 1, as shown above, if the microcomputer 1 detects the exit state (exit B), the microcomputer 1 I judge that.

Therefore, since the period between when the microcomputer 1 determines that the user has entered the room and when it further determines that the user has left the room is when the person is using the toilet, the entire microcomputer is . The computer 11 determines that the toilet is in use.

As described above, by automatically performing the series of operations described above, the function as the Shitomole usage state detection device is exhibited.

In addition, the human body detection sensor section 3 can basically be installed at any position as long as it is close to the entrance door 2 of the toilet room 10; It goes without saying that this can also be achieved by using a two-element integrated pyroelectric infrared sensor in which each of the sensors 7 is housed in one sensor package.

Effects of the Invention As is clear from the above description of the embodiments, the present invention detects when a toilet user enters and exits the toilet room using a human body detection sensor section, and uses a human body determination means to detect when a toilet user enters and exits the toilet room. The system is configured to determine whether a toilet user is in the toilet room or not, and to determine the toilet usage status, so it detects that the toilet user is moving in the toilet room This has the excellent effect of making it possible to reliably and stably detect the usage status of the toilet without relying on an uncertain method of determining the usage status of the toilet.

[Brief explanation of the drawing]

Figures 1 (-) and (b) of the whistle are front and side views of a toilet usage state detection device according to an embodiment of the present invention, Figure 2 is a configuration diagram of the control section, and Figures 3 (-) and (b). ) are a front view and a top view of the human body detection sensor section, FIGS. 4(a) to 4(d) are explanatory diagrams of signals for detecting the state of use of the toilet, and FIG. 6 is a circuit configuration diagram of the main parts. 3...Human body detection sensor section, 6...Human body determination means, 6...Entrance side sensor, 7...
・Indoor sensor, 11...Microcomputer. Name of agent: Patent attorney Toshio Nakao and one other person
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Claims (1)

[Claims] Two pyroelectric infrared sensors of the human body detection sensor section, which detect changes in the heat generated by the body of a toilet user entering the toilet room, are installed near the entrance of the toilet room parallel to the direction of travel of the toilet user. If a toilet user crosses this human body detection sensor section, the time difference between the signals generated by the two pyroelectric infrared sensors will cause the toilet user to be inside the toilet room. What is claimed is: 1. A toilet use state detection device comprising: a human body determining means for determining the presence of a human body.