JPH02157332A - Automatic cleaning device - Google Patents

Abstract

PURPOSE:To prevent malfunction due to the effect of noise by installing an auxiliary luminescence generating device on a light emitting means, and a judging means to open a faucet when the detected frequency of receivable light of its luminescence frequency was found by counting to be less than a specified frequency. CONSTITUTION:A light emitting means 1 periodically irradiating light and a light receiving means 2 detecting reflected light reflected by a user of the light from the light emitting means 1 are installed. Next, when detecting people based on the output signal of the light receiving means 2, an auxiliary luminescence generating device 11 which emits a plural number of light at a period shorter than the luminescence period of the light emitting means 1 is installed. The detected frequency as detected by the light receiving means 2 of the luminescence frequency emitted from the auxiliary luminescence device is counted. When the detected frequency becomes below a specified frequency, a faucet is opened and cleaning water is supplied by actuating a faucet drive circuit 21. This makes it easy to distinguish accidentally caused noise and the detection signal of the user, so that a highly reliable device can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic flushing device for a toilet or the like that automatically supplies water after detecting a user.

(Prior Art) A cleaning device is known that detects a user by optical means and supplies cleaning water to an automatic fishing rod when the user is no longer detected.

In this cleaning device, the detection of a person by the optical means is performed, for example, by driving a light emitting element to emit light and detecting the reflected light with a light receiving element.

In devices that use a battery or the like as a power source, the light emitting and light receiving elements are generally driven periodically (intermittently) in order to prevent power consumption.

(Problem to be Solved by the Invention) However, when emitting light and driving the light-receiving element intermittently in this way, for example, if noise is generated due to the influence of external electromagnetic waves, etc., the light-receiving element may A signal that appears to indicate that a user has been detected may be output, making malfunctions more likely to occur.

In order to remove such noise, it is conceivable, for example, to make the detection level of the light receiving element higher than that of the noise, but in such a case, the detection sensitivity of the user will also be reduced, which is not preferable.

The present invention has been made to solve such conventional problems, and its purpose is to provide a highly reliable automatic cleaning device that is not easily affected by noise and does not reduce sensitivity. It is in.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a light emitting means that periodically irradiates light, and a light emitting means that emits light that is reflected by a part of the user's body. In an automatic cleaning device comprising a light receiving means for detecting light, and a control means for opening a faucet and supplying washing water when a user is no longer detected based on a detection signal of the light receiving means, the light receiving means When a person is detected based on the output signal of , auxiliary light emission generating means causes the light emitting means to emit a plurality of light beams at a cycle shorter than the period, and the number of times of light emission by the auxiliary light emission means is The control means includes a judgment means for counting the number of detections detected by the light receiving means and outputting a judgment signal to open the water faucet when the number of detections is less than or equal to a predetermined number.

(Function) According to this configuration, since the user can be detected based on a plurality of light reception signals, it is possible to easily determine between incidentally generated noise and the user's detection signal, and it is also possible to High sensitivity can be maintained without the need to reduce detection sensitivity.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a block diagram showing an automatic cleaning device according to the present invention, and FIG. 2 is a time chart.

In the figure, 1 is a light emitting means composed of a photodiode etc., 2 is a light receiving means composed of a phototransistor etc. and detects the light reflected by the user out of the light emitted by the light emitting means 1, and 3 is a light receiving means composed of a phototransistor etc. is a control means.

The light emitting means 1 is normally driven by an intermittent light emitting pulse generator 5 which divides the frequency of a clock generated by a basic clock generator 4 and generates pulses at an appropriate period. The output pulse of this intermittent light emission pulse generator 5 is shown in Fig. 2 (b).
It is shown in

In this state, when a part of the user's body approaches, the light receiving means 2 outputs its detection signal to the waveform shaping circuit 6, and the waveform shaping circuit 6 outputs the pulse signal shown in FIG. 2(c).

Incidentally, FIG. 2(a) shows the actual usage time period by the user and does not show the signals. The pulse signal of the waveform shaping circuit 6 is ANDed with the drive signal S1 of the light emitting means 1 by an AND circuit 7, and the output signal is inputted to the set terminal 8a of the R-S flip-flop 8. The reason for performing the logical product using the AND circuit 7 here is to remove noise generated by external light, etc., other than when the light emitting means 1 is released, and its output signal is shown in FIG. 2 (c).
becomes equal to the signal of

The flip-flop 8 maintains the output of its Q output terminal 8b at a high level as shown in FIG. 2(E) from the time when the light receiving means 2 first receives light until the light is no longer received. The reset terminal 8c is connected to an AND circuit 10 which performs the logical product of the signal obtained by inverting the output signal of the waveform shaping circuit 6 by the NOT circuit 9 and the drive signal Sl of the light emitting means 1 (FIG. 2 (b)). Output is done manually. This input signal is shown in FIG. 2(d).

A frequency dividing circuit 11 is connected to the Q output terminal of the flip-flop 8.
．． A first counter 12 is connected, and when the output signal of the Q terminal becomes high level, these counters 11 and 12 become operational.

The frequency dividing circuit 11 immediately forms an auxiliary drive pulse by dividing the basic clock when a light reception signal is detected by the light reception means 2, and its output signal is shown in FIG. It is shown as follows. Said first counter 1
2 converts the output pulse of the frequency dividing circuit 11 into a driving pulse (Fig. 2 (
b)) While counting a predetermined number (four in the example) in synchronization with
As shown in FIG. 2 (G), a high level signal is output, but the output signal is ANDed with the output signal of the frequency dividing circuit 11.
The logical product is calculated by the circuit 14, and is input to the light emitting means together with the output signal of the intermittent light emitting pulse generator 5 via the OR circuit 15.

Therefore, the output signal of the AND circuit 14 becomes four short-cycle pulse signals as shown in FIG. It constitutes a generating means.

The second counter indicated by reference numeral 13 operates while the output signal of the first counter 12 is present through the signal line 13a (second
(G), the clocks of the basic clock generator 4 are counted over the output time of the high level signal when the output signal of the AND circuit 7 is inverted by the NOT circuit 16. The second counter 13 outputs a pulse signal when the counted value exceeds a predetermined value (FIG. 2 (N)). The predetermined number of the second counter 13 is determined by the pulse signal when there is a pulse that is not detected by the light receiving means among the light emitted by the auxiliary drive pulse as in the state shown in FIG. The value is such that it is output. Further, the value is such that the pulse signal is not output when all the light due to the auxiliary pulse is received.

Further, a third counter indicated by reference numeral 18 receives the basic clock over the output time of the output signal of the AND circuit 7 while the output signal of the flip-flop 8 is present through the signal line 18a (FIG. 2 (E)). Count the clocks of occurrence W4. This third counter 18 outputs a pulse signal when the counted value exceeds a predetermined number of times (Fig. 2 (N)).
The AND circuit 19 calculates the product with the output signal of the second counter 13, and operates the faucet drive circuit 18 via the OR circuit 20 to supply washing water. (Figure 2 (
nu)).

On the other hand, if the count value by the second counter 13 does not reach the predetermined value, the faucet drive circuit 18 is not driven, and therefore, in this case, the same signal processing is performed again with the light reception signal generated by the next drive pulse. .

On the other hand, if the light reception signal due to the driving pulse of the clothing is not detected (in this case, the signal in Fig. 2 (h) is
Figure 2 (E) is the output signal of the logical product of the pulse signal shown in Figure 2 (D) by the AND circuit 20 and the pulse signal shown in Figure 2 (E). ) The faucet drive circuit 21 is driven by the output signal of (
Figure 2 (force)). At the same time, the Q output terminal of the flip-flop circuit 8 becomes a low level, thereby stopping the driving of the frequency dividing circuit and resetting the first counter 12.

As described above, according to this embodiment, the second counter 13
If it counts as a predetermined number (if the detection of drive pulses is less than a predetermined number), the faucet drive circuit 21 will be operated, and the third counter 18 and the like will constitute the determining means of the present invention, Further, if the third counter 18 does not count a predetermined number even if the light reception signal is output, it is determined that the light reception signal is due to noise, and the faucet drive circuit 21 is not operated, and the third counter 18 etc. This also constitutes the determination means of the present invention.

According to the above configuration, it is possible to reliably and quickly detect that the user has left, and even if the light receiving means 2 outputs a signal corresponding to the detection signal due to the influence of noise etc., the The faucet is never driven, increasing its reliability. It is also clear that in such a configuration, the influence of noise can be removed without reducing the detection sensitivity of the light receiving means 2 in any way.

Although the above is an embodiment of the present invention, the present invention is not limited to this embodiment. For example, as shown in FIG. 3, the CPU 19. It is composed of a microcomputer 22 equipped with a memory 20°11021, etc., and its control is performed by a fourth
The process may be performed as shown in the flowchart shown in the figure.

To explain the flowchart in FIG. 4, step 1 is initial setting, step 2 is driving of the light emitting means in the standby state, step 3 is the start of a timer for measuring the period for intermittent light emission, and this period is set in step 11. measure. Step 4 is a judgment as to whether or not the light receiving means has detected the light emission in Step 2. Steps 5 to 10 are operations for driving auxiliary light emission when there is detection by the light receiving means 2. A timer is used to count the period, and N is a parameter indicating the number of light receptions (4 times) relative to the number of drives. Step 5 is a flag setting for determining that light has been received once in step 13, and steps 6 to 12 is an operation for setting the cycle of auxiliary light emission drive;
Step 9 constitutes the determining means of the present invention by determining whether or not light has been received for all light emitting operations, and if there is no received light signal, it is determined that the signal detected before is due to noise, and step At step 14, the faucet is opened, and when the first timer times up, P is set to φ. and,
The first timer is restarted, the number of times P of the first timer times up is compared with a constant Pa, and the process is repeated until P=Pm, and the water faucet that satisfies the condition P=Pm is closed.

(Effects of the Invention) As is clear from the above description, according to the present invention, it is possible to provide an automatic cleaning device that can prevent malfunctions due to the influence of noise without reducing detection sensitivity in any way, and has excellent reliability. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing an automatic cleaning device according to the present invention, FIG. 2 is a diagram showing a time chart, FIG. 3 is a configuration diagram according to another embodiment, and FIG. 4 is a diagram showing the operation of another embodiment. It is a flowchart. In the drawings, 1 is a light emitting means, 2 is a light receiving means, 3 is a control means, 11, 12, etc. are auxiliary light emission generating means, and 13 is a determining means.

Claims (1)

[Scope of Claims] A light emitting means for periodically irradiating light, a light receiving means for detecting reflected light reflected by a part of the user's body among the light from the light emitting means, and detection of the light receiving means. In an automatic cleaning device equipped with a control means for opening a faucet and supplying washing water when a user is no longer detected based on a signal, when a person is detected based on an output signal of the light receiving means, an auxiliary light emission generating means for causing the light emitting means to emit a plurality of light emissions at a cycle shorter than the period; counting the number of times the light is detected by the light receiving means out of the number of times the light is emitted by the auxiliary light emission generating means; An automatic cleaning device characterized in that the control means includes a determining means for outputting a determining signal to open a water faucet when the number of detections is equal to or less than a predetermined number of times.