JP4458053B2 - Urinal cleaning device, urinal cleaning system and water supply device - Google Patents

Description

  The present invention relates to a urinal cleaning device, a urinal cleaning system, and a water supply device, and more specifically, detects a human body, a urine flow, and other objects based on a Doppler signal output from a microwave Doppler sensor. The present invention relates to a urinal cleaning device, a urinal cleaning system, and a water supply device.

  2. Description of the Related Art Conventionally, a urinal cleaning device that detects a human body or urine flow using a microwave Doppler sensor and cleans the inside of a urinal ball has been known (see, for example, Patent Document 1).

  This type of urinal cleaning device is effective in that the sensor can be arranged in the urinal compared to a urinal cleaning device that detects human bodies by infrared rays. That is, since the microwave Doppler sensor can be hidden inside the urinal using the characteristic that microwaves can pass through the pottery, the aesthetics of the urinal cleaning device can be improved.

Further, since the microwave Doppler sensor uses the Doppler effect, it is effective in that the velocity of the urine flow can be detected. That is, by cleaning the inside of the bowl of the urinal only after detecting the urine flow by the microwave Doppler sensor, it is possible to prevent the urinal from being washed when the user is not using it. be able to.
Japanese Utility Model Publication 2-69760 JP 2005-265615 A

  By the way, in many cases, a plurality of such urinal cleaning devices are installed in the same toilet booth except for a home toilet booth. For example, toilet booths at airports, stations, hotels, etc. However, when a plurality of urinal cleaning devices as described above are installed in the same toilet booth, the microwave sensors of adjacent urinal cleaning devices may affect each other and normal detection of the human body and urine flow may not be possible. .

  Therefore, conventionally, in order to suppress malfunction due to the influence of the microwave Doppler sensors, urinal cleaning devices having different frequencies of the microwave Doppler sensors are prepared for adjacent numbers, and the frequencies do not overlap in the toilet booth. It was like that.

  However, if several types of urinal cleaning devices with different frequencies of microwave Doppler sensors are required, the product number of the urinal cleaning device increases, leading to an increase in production costs, and in the installation work at the toilet booth. Will also be a burden.

  Patent Document 2 discloses a technique for suppressing the influence of the microwave Doppler sensors to a level that can be ignored by intermittently performing the operation of the microwave Doppler sensor in a random cycle. Application to a cleaning apparatus is also conceivable. However, in order to digitally process the Doppler signal sampled in such a random period, it is necessary to convert the signal value to the reference period, and the control calculation capability of the apparatus has to be greatly increased. .

  Therefore, the present invention relates to a urinal washing apparatus and a urinal washing apparatus that can reduce the influence between the apparatuses even in the case where a plurality of these are installed adjacent to each other in an apparatus such as a urinal washing apparatus using a microwave Doppler sensor. It aims at providing an apparatus and a water supply apparatus.

  Therefore, the inventions of claims 1 and 4 are a urinal, a water supply valve for supplying cleaning water into the ball part of the urinal, a radio wave is transmitted toward the ball part, and a reflected wave is received. A microwave Doppler sensor that generates a Doppler signal and performs human body detection or urine flow detection based on the Doppler signal, controls the water supply valve according to the human body detection or the urine flow detection, and cleans the ball portion And a control unit for supplying water, wherein the control unit divides a period necessary for determining the human body detection or the urine flow detection based on the Doppler signal into a plurality of periods. A period is defined as a first period, and a second period is provided within the first period that is delayed by a predetermined time from the beginning of the first period, and the microwave is transmitted after the second period has elapsed since the beginning of the first period. Sensor control means for intermittently operating the Doppler sensor n times (n is an integer of 2 or more) at a predetermined sampling period, and an object for detecting the human body or the urine flow according to the Doppler signal output from the microwave Doppler sensor Detecting means, and the sensor control means sets the second period for each of the first periods.

  According to a second aspect of the present invention, in the first aspect of the present invention, the object detection means indicates that the Doppler signal generated in the first period continuously indicates a human body or urine flow for a predetermined period. When it is determined as data, the human body detection or the urine flow detection is performed.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the sensor control means randomly sets the second period for each of the first periods. .

  According to a fifth aspect of the present invention, there is provided a microwave microwave Doppler sensor that transmits a radio wave in a predetermined direction, receives a reflected wave thereof, and generates a Doppler signal, and detects an object based on the Doppler signal. And a control unit that controls the water supply valve according to the detection of the object and supplies water, the control unit is necessary to determine the detection of the object based on the Doppler signal The first period is divided into a plurality of periods and each period is defined as a first period. A second period is provided within the first period to be delayed by a predetermined time from the start time of the first period. The second period from the start time of the first period is provided. Sensor control means for intermittently operating the microwave Doppler sensor n times (n is an integer of 2 or more) at a predetermined sampling period after the period has elapsed, and output from the microwave Doppler sensor A subject detecting means for detecting the target object in response to Ppura signal, the sensor control unit, for each of the first period, and sets the second period.

  According to the first and fourth aspects of the present invention, the period required for determining the human body detection or the urine flow detection based on the Doppler signal is divided into a plurality of periods, and each period is defined as a first period. A second period that is delayed for a predetermined time from the start of the first period is provided within the first period, and the microwave Doppler sensor is moved n times (n) at a predetermined sampling period after the second period has elapsed from the start of the first period. Is an integer greater than or equal to 2), and the second period is set for each first period, so that the probability that the operations of adjacent sensors continuously match can be reduced. As a result, in a urinal cleaning device using a microwave Doppler sensor, even when a plurality of urinal cleaning devices are installed adjacent to each other, it is possible to operate with reduced influence on each other. There is no need to increase the product number of the toilet bowl cleaning device. In addition, since sampling is performed not at random intermittent periods but at constant periods, Doppler signal processing is not complicated, and the burden on the control calculation capability is small.

  According to the second aspect of the present invention, when the object detection means determines that the Doppler signal generated in the first period is data indicating a human body or urine flow continuously in a predetermined period, the human body detection Alternatively, since urine flow detection is performed, erroneous detection and detection omission can be reduced, and the influence between adjacent urinal washing apparatuses can be further reduced.

  According to the invention of claim 3, since the second period is set at random for each first period, it is possible to reduce the probability that the influence between adjacent urinal cleaning devices is continuous in time. In addition, the setting process for the second period is not complicated.

  According to the invention of claim 5, a period necessary for determining the detection of the object based on the Doppler signal is divided into a plurality of periods, and each period is defined as a first period. A second period that is delayed for a predetermined time from the beginning of the first period, and the microwave Doppler sensor is moved n times (n is 2 or more) at a predetermined sampling period after the second period has elapsed from the start of the first period. Since the second period is set for each first period, it is possible to reduce the probability that the operations of adjacent sensors are continuously matched. As a result, in a water supply device using a microwave Doppler sensor, even when a plurality of water supply devices are installed adjacent to each other, it is possible to operate with reduced influence on each other. There is no need to increase In addition, since sampling is performed not at random intermittent periods but at constant periods, Doppler signal processing is not complicated, and the burden on the control calculation capability is small.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the drawings. In this embodiment, as shown in FIG. 1, among the water supply apparatuses using a microwave Doppler sensor, a urinal washing apparatus A that performs human body detection and urine flow detection using a microwave Doppler sensor in a toilet booth is provided. The urinal washing device system S arranged adjacent to each other will be described. FIG. 2 is an overall configuration diagram of the urinal cleaning device A according to the embodiment of the present invention, and FIG. 4 is a schematic configuration diagram of the control unit 8 of the urinal cleaning device A.

  As shown in FIG. 2, the urinal washing apparatus A according to the present embodiment is provided in the middle part of the urinal 1, the ball part 2, and the water supply channel 3, and supplies washing water into the ball part 2 of the urinal 1. A water supply valve 4 to be supplied, a drainage passage 5 disposed at the bottom of the ball portion 2 for draining dirty water in the ball portion of the urinal 1, a trap pipe 6 communicating with the drainage passage 5, and a ball of the urinal 1 A microwave Doppler sensor 7 that transmits radio waves toward the unit 2 and receives the reflected wave to generate a Doppler signal, and human body detection and urine flow detection based on the Doppler signal output from the microwave Doppler sensor 7 And a control unit 8 that controls the water supply valve 4 in accordance with the results of human body detection and urine flow detection, and supplies cleaning water into the ball unit 2. The water supply valve 4 is composed of an electromagnetic valve or the like.

  The microwave Doppler sensor 7 is disposed on the upper back side of the urinal 1 and radiates and transmits a radio wave toward an obliquely lower front including the ball portion 2 and receives a reflected wave of the radio wave. To detect that urine has flowed into the ball part 2 of the toilet 1 (urine flow), that the human body has approached the urinal 1 (close to the human body), and that the human body has moved away from the urinal (human body separation) 4 and is configured as shown in FIG.

  That is, the microwave Doppler sensor 7 includes an oscillation circuit 10 that generates a transmission signal S1 that is an electrical signal of 10.525 GHz in order to transmit radio waves from the upper back side of the urinal 1 toward the ball part 2 on the front side. Transmission means 11 for transmitting the transmission signal S1 output from the oscillation circuit 10 as a 10.525 GHz microwave, and the microwave transmitted from the transmission means 11 is reflected by the object to be detected, and the reflected wave is received to receive an electrical signal. Receiving means 12 for outputting the reception signal S2 converted into a difference signal, and difference detection means 13 for outputting a Doppler signal S3 which is a difference signal between the frequency of the transmission signal S1 and the frequency of the reception signal S2. Further, a switch SW1 is provided between the oscillation circuit 10 and the transmission means 11. When the switch SW1 is turned on by the control unit 8, the transmission signal S1 is supplied to the transmission unit 11, and the control unit 8 Is turned off, the supply of the transmission signal S1 to the transmission means 11 is stopped.

  The microwave Doppler sensor 7 is used to detect the movement of the detection target based on the following formula (1) using the Doppler effect.

Basic formula: ΔF = FS−Fb = 2 × FS × ν / c (1)
ΔF: Doppler frequency (frequency of Doppler signal S3)
FS: Transmission frequency (frequency of transmission signal S1)
Fb: reflection frequency (frequency of received signal S2)
ν: moving speed of detection object c: speed of light (300 × 10 ⁶ m / s)

  That is, the microwave of the frequency FS transmitted from the transmission unit 11 is reflected by the detection target moving at the speed ν. Since this reflected wave has undergone Doppler frequency shift due to relative motion, its frequency is Fb and is received by the receiving means 12. Then, the difference detection means 13 takes out the Doppler signal S3, which is the frequency difference ΔF between the transmitted wave and the reflected wave, as a detection signal. Based on this Doppler signal S3, human body detection (human body approach detection or human body separation detection) and urine Flow detection is performed.

  A Doppler signal S3 output from the microwave Doppler sensor 7 is converted into a digital Doppler signal S4 by an A / D converter 22 which is an A / D conversion means. Thereafter, the digital Doppler signal S4 is input to the object determination means 24 after the digital filter circuit 23 removes frequency components other than the band necessary for human body detection and urine flow detection.

  The object determination means 24 determines whether to detect a human body or urine flow based on the input digital Doppler signal S4. When the human body detection or urine flow detection is determined by the object determination means 24, the water supply valve control unit 25 controls the water supply valve 4 according to a predetermined condition to supply cleaning water into the ball unit 2.

  Here, in the present embodiment, the Doppler signal for detecting the human body is set to 50 (Hz) or less, and the Doppler signal for detecting the urine flow is set to 100 to 180 (Hz). The Doppler signal of 50 (Hz) or less is output from the microwave Doppler sensor 7 when the velocity ν of the detection target is approximately 0.7 (m / s) or less, and is 100 to 180 (Hz). The Doppler signal is output from the microwave Doppler sensor 7 when the velocity ν of the detection object is approximately 1.4 to 2.6 (m / s).

  When the Doppler signal S3 having a predetermined threshold value of 50 (Hz) or less is continuously output from the microwave Doppler sensor 7 for a predetermined period, the object determination unit 24 performs human body approach detection. When the human body approach detection is performed in this way, the water supply valve control unit 25 controls the water supply valve 4 to supply a predetermined amount of cleaning water into the ball unit 2. Thereafter, when a Doppler signal S3 having a predetermined threshold value of 100 to 180 (Hz) or more is continuously output from the microwave Doppler sensor 7 for a predetermined period, the object determination means 24 performs urine flow detection. Thereafter, when a Doppler signal S3 of 50 (Hz) or less is continuously output from the microwave Doppler sensor 7 for a predetermined period, the object determination means 24 performs human body separation detection. When the human body separation is detected after the urine flow is detected in this way, the water supply valve control unit 25 controls the water supply valve 4 to supply a predetermined amount of washing water into the ball unit 2 to wash the urinal 1. I do.

  By the way, in the urinal washing apparatus system S in which a plurality of urinal washing apparatuses A are adjacent to each other, as shown in FIG. 3, the adjacent microwave Doppler sensors 7 affect each other, and erroneous detection of the human body and urine flow occurs. There is a fear.

  Therefore, as shown in FIGS. 4 and 5, the control unit 8 in this embodiment is provided with sensor control means 20 for intermittently operating the microwave Doppler sensor 7 with an equal interval sampling period Ta, and the microwave Doppler sensor 7 is sampled. The possibility of the simultaneous operation of the microwave Doppler sensors 7 of the urinal washing apparatus A adjacent to each other is reduced by causing the intermittent operation at the period Ta. That is, the operation time of the microwave Doppler sensor 7 is reduced as much as possible by intermittently driving the microwave Doppler sensor 7 using the Nyquist sampling theorem. In the present embodiment, since it is sufficient that a Doppler signal up to 180 Hz can be obtained for object detection, the sampling frequency may be a frequency higher than 360 Hz. Therefore, in the present embodiment, as shown in FIG. 5, the equally-spaced sampling period Ta is set to 2 ms (sampling frequency 500 Hz). In addition, a period T2 for operating the microwave Doppler sensor 7 for one sampling (hereinafter referred to as “driving period T2”) is 10 μS.

  In FIG. 6A, when the microwave Doppler sensor 7 is intermittently operated at an equal interval sampling period Ta in this way, the Doppler signal output from the microwave Doppler sensor 7 at each sampling period Ta is indicated by a black circle. ing. FIG. 6B shows a black dot indicating a Doppler signal output from the microwave Doppler sensor for each sampling period when the microwave Doppler sensor 7 is sampled at a random period, that is, an unequal interval sampling period. Yes. When sampling is performed at unequal intervals in this way, processing to convert the signal value to match the reference period is required. However, by performing sampling at equal intervals as shown in FIG. Therefore, it is not necessary to convert the signal value to match the signal value.

  In addition to the intermittent operation at the sampling period Ta as described above, in order to further reduce the possibility that the microwave Doppler sensors 7 operate simultaneously, every predetermined period T1 (hereinafter referred to as “first period T1”). In addition, the sampling start timing is shifted. The predetermined time T1 is a period obtained by dividing a period necessary for determining human body detection or urine flow detection into a plurality of times. The reason why the sampling start timing is shifted every predetermined period T1 in this way is as follows.

  That is, when a plurality of urinal washing apparatuses A using the microwave Doppler sensors 7 continuously perform the intermittent operation at the sampling period Ta, the timings of the intermittent operations coincide with each other by the microwave Doppler sensors 7. Sometimes. Thus, in a state where the intermittent operation timings coincide with each other, the microwave Doppler sensors 7 may continuously affect each other for a long period of time, which may cause erroneous detection or detection omission of an object.

  Therefore, even if the timing of intermittent operation coincides between the microwave Doppler sensors 7, the coincidence state is prevented from continuing for the first period T1 or more by shifting the sampling start timing for each first period T1.

  Hereinafter, the mechanism in which the microwave Doppler sensor 7 is intermittently operated at the sampling period Ta and the sampling start timing is shifted for each first period T1 will be specifically described with reference to FIGS.

  As shown in FIG. 4, the control unit 8 includes a code output unit 21 that outputs code information to the sensor control unit 20 for each first period T1. The sensor control means 20 starts an intermittent operation at the sampling period Ta in the microwave Doppler sensor 7 at a timing according to the code information output from the code output means 21, and performs this intermittent operation n times (n is 2 or more). This is repeated every time code information is output from the code output means 21. Here, the timing according to the code information refers to a period tb (hereinafter referred to as “second period tb”) that is delayed by a predetermined time from the beginning of the first period T1 provided in the first period T1. This is a timing defined by the information, whereby the timing from the start of the first period T1 to the start of the intermittent operation changes according to the code information. That is, the sensor control means 20 generates the start time of the first period T1, that is, the start timing ta for each first period T1, and based on the code information output from the code output means 21, the sensor control means 20 starts from the start timing ta. After the elapse of two periods tb, the microwave Doppler sensor 7 is intermittently operated n times (n is an integer of 2 or more) at a predetermined sampling period, and thereafter this is repeated while changing the setting of the second period tb. In other words, the sensor control means 20 sets the intermittent operation of the microwave Doppler sensor 7 n times at a predetermined sampling period Ta within the first period T1 as one unit block (hereinafter referred to as “intermittent operation block”). The intermittent operation block is repeated while changing the timing of the first intermittent operation in the intermittent operation block.

  Note that the n intermittent operations are set to the number of times required for the digital filter processing, and the arithmetic processing in the first period T1 can be thinned out by minimizing the number of times.

  FIG. 7 shows an example of intermittent operation of the microwave Doppler sensor 7 controlled by the control unit 8 configured as described above. In this example, first, in the first intermittent operation block (block 1), the code output means 21 outputs code information of “code 1”. The sensor control means 20 determines the second period tb based on this code information. Thereafter, the sensor control means 20 starts n intermittent operations by the microwave Doppler sensor 7 with a delay of the second period tb (1) from the start timing ta (1) of the first period T1. In the next second intermittent operation block (block 2), the code output means 21 outputs the code information of “code 5”. The sensor control means 20 determines the second period tb based on this code information. The sensor control means 20 delays the second period tb (5) from the start timing ta (2) of the first period T1 and starts n intermittent operations by the microwave Doppler sensor 7.

  As for the code information, the code output means 21 calculates a random value by a pseudo-random algorithm or a random number generation circuit, and uses the randomly calculated value as code information. However, this code information is an integer from 1 to m. And the sensor control means 20 has the 2nd period information corresponding to this code information. That is, the sensor control means 20 stores the second period tb (1) to tb (m) corresponding to the code information. For example, when the code information is 5, the sensor control unit 20 selects the second period tb (5). To do. Here, t (n) = n × t (1).

  Further, the code information is not a random value, a table (not shown) in which the code information is arranged in a predetermined arrangement is stored in a storage unit (not shown), and this table is used by the sensor control means 20, The microwave Doppler sensor 7 may be intermittently operated.

  Further, the code information may be switched in order from the code 1. The operation of the code output means 21 at this time will be described with reference to FIG. The code output means 21 increments the code information by 0 to +1 (STEP 1), and outputs the code information incremented by +1 to the sensor control means 20 (STEP 2). Thereafter, the processing of STEP 1 and S 2 is repeated until the code information becomes 100 (STEP 3). When the code information becomes 100, the code information is reset to 0 (STEP 4). The code output means 21 repeats the above processing every first period T1.

  The sensor control means 20 and the code output means 21 have been described separately. However, the present invention is not limited to this. For example, without providing the code output means 21, the sensor control means 20 uses a pseudo random number algorithm or a random number generation circuit. A random value may be calculated and operated as code information.

  FIG. 9 shows the operating state of each microwave Doppler sensor 7 when four urinal cleaning devices A are installed adjacent to each other in the toilet booth. In FIG. 9, for convenience, these microwave Doppler sensors 7 are shown. Sensors 7 are shown as sensors 1 to 4, respectively.

  In this example, first, in the first intermittent operation block (block 1), the second period tb from the first period T1 to the start of operation is tb (1), tb (3), tb (9), t (3 The intermittent operation timings of the sensor 2 and the sensor 4 are the same. Therefore, the sensors 2 and 4 influence each other. However, in the subsequent second intermittent operation block (block 2), the second period tb from the start timing of the first period T1 to the start of operation is tb (5), tb (1), tb (2), t ( 8) Therefore, there is no situation where the sensor 2 and the sensor 4 influence each other.

  Thus, even if the intermittent operation timings of the microwave Doppler sensors 7 coincide with each other by shifting the start timing of the intermittent operation for each first period T1, the coincidence state does not continue beyond the first period T1, The influence between the microwave Doppler sensors 7 can be avoided as much as possible.

  Then, the object determination by the object determination means 24 is performed using a plurality of intermittent operation blocks, thereby reducing the influence of the microwave Doppler sensors 7 to a negligible level.

  In the present embodiment, the object determination unit 24 detects an object when the Doppler signal has an amplitude level equal to or greater than a predetermined threshold in three consecutive intermittent operation blocks. The Doppler signal for determining human body detection is a Doppler signal that has been attenuated by the digital filter circuit 23 except for the frequency band of 50 Hz or less, and the Doppler signal for determining urine flow detection is 100 to 180 Hz by the digital filter circuit 23. This is a Doppler signal that is attenuated except for the frequency band.

  FIG. 10 is a diagram illustrating an example of determination of an object by the object determination unit 24. As shown in FIG. 10A, the object detection by the object determination means 24 is not performed for a Doppler signal whose amplitude level is increased only in one intermittent operation block. On the other hand, as shown in FIG. 10 (b), the object detection unit 24 performs object detection for a Doppler signal whose amplitude level increases over three or more consecutive intermittent operation blocks. As described above, a period necessary for performing determination of object detection such as human body detection or urine flow detection is a period of a plurality of continuous intermittent operation blocks, that is, a time that is an integral multiple of the first period T1. Therefore, the first period T1 can be rephrased as a period obtained by dividing the period necessary for determining whether to detect the human object.

  Here, the object determination process in the object determination means 24 will be specifically described with reference to the flowchart of FIG.

  First, the intermittent operation timing of the microwave Doppler sensor 7 arrives, and the sensor control means 20 operates the microwave Doppler sensor 7 only during the driving period T2. By this operation, the Doppler signal output from the microwave Doppler sensor 7 is received by the object determination means 24 (STEP 10).

The object determining means 24 determines whether or not the received Doppler signal is larger than a predetermined threshold (STEP 11). When it is determined that the received Doppler signal is equal to or greater than a predetermined threshold (
(STEP 11: Yes), the detection counter N is incremented by +1 (STEP 12). When the detection counter N becomes 3 or more by this increment, the object determining means 24 detects the object, that is, determines that there is an object (STEP 14). Then, the sensing counter N is reset to 0 (STEP 16), and the process is terminated. On the other hand, when the sensing counter N is not 3 or more (STEP 13: No), the process is terminated.

  If it is determined in STEP 11 that the received Doppler signal is smaller than the predetermined threshold (STEP 11: No), the object determining means 24 determines that there is no object (STEP 15). Then, the sensing counter N is reset to 0 (STEP 16), and the process is terminated. The detection counter N includes at least two detection counters N1 for detecting a human body and a detection counter N2 for detecting urine flow, and the above processing is performed on each of the detection counters.

  The above processing is repeated every time the microwave Doppler sensor 7 operates intermittently. That is, it is performed every sampling period Ta.

  As described above, the object determination unit 24 determines that the data indicates the object when the Doppler signal is equal to or greater than the predetermined threshold value continuously for a predetermined period. That is, the object determination means 24 determines that the data indicating the human body has continued for a predetermined period when the Doppler signal attenuated by the digital filter circuit 23 other than the frequency band of 50 Hz or less is continuously higher than a predetermined threshold for a predetermined period. The human body is detected, and when the Doppler signal attenuated by the digital filter circuit 23 other than the frequency band of 100 to 180 Hz is continuously higher than a predetermined threshold for a predetermined period, it is determined that the data indicating the urine flow is continuous for the predetermined period. Then, urine flow detection is performed.

  Incidentally, in the above description, the sensor control means 20 starts the intermittent operation of the microwave Doppler sensor 7 at the timing corresponding to the code information output from the code output means 21 every first period T1, but FIG. A table as shown in FIG. 5 is provided in the sensor control means 20, and a period (hereinafter referred to as “one segment”) in which the x blocks are grouped is set, and code information is output from the code output means 21 at this segment interval. You may do it. For example, when the code information of “code 2” is output from the code output means 21, the first intermittent oscillation block 1 has the second period tb (2) and the next block 2 has the period t (4). In block 3, the second period tb (6) is set, and the second period tb is set using the table until the block x is reached. In the example shown in FIG. 12, the second period tb is assigned in the order of blocks in block order.

  FIG. 13 shows the threshold determination state of the Doppler signal in each object determination means 24 in the other state where four urinal washing apparatuses A having a table as shown in FIG. In this figure, the operating states of these microwave Doppler sensors 7 are shown as sensors 1 to 4 for convenience. As in the case of FIG. 10, for a Doppler signal whose amplitude level is increased only in one intermittent operation block, the object detection by the object determination means 24 is not performed, and the amplitude is applied to three or more consecutive intermittent operation blocks. For the Doppler signal having a high level, the object detection unit 24 performs object detection.

  The determination of the object by the object determination means 24 is performed when the Doppler signal has an amplitude level equal to or greater than a predetermined threshold in three intermittent operation blocks among five consecutive operation blocks. It may be determined that an object has been detected. That is, the object detection may be performed when there are a predetermined number of intermittent operation blocks in which a Doppler signal has an amplitude level equal to or greater than a predetermined threshold within a predetermined period.

  As described above, the urinal washing apparatus A according to the present embodiment divides a period necessary for determining human body detection or urine flow detection based on the Doppler signal into a plurality of periods as the first period T1. Further, a second period T2 for delaying a predetermined time from the start timing ta of the first period T1 is provided in the first period T1. The microwave Doppler sensor 7 is intermittently operated at a predetermined sampling period Ta after the second period T2 has elapsed from the start timing ta of the first period. As described above, in the urinal washing apparatus A according to the present embodiment, the sampling start timing of the microwave Doppler sensor is shifted every first period T1, and therefore the influence between the microwave Doppler sensors 7 is as much as possible. Can be made smaller.

  Although several embodiments of the present invention have been described in detail with reference to the drawings, these are merely examples, and various modifications and improvements can be made based on the knowledge of those skilled in the art including the above-described embodiments. It can implement in other embodiment which gave.

  For example, in the present embodiment, the microwave Doppler sensor 7 transmits radio waves from the upper back side of the urinal 1 toward the ball part 2 on the front side. However, the present invention is not limited to this. The wave Doppler sensor 7 may be attached to the lower back side of the urinal 1 to transmit radio waves obliquely upward toward the front of the standing user, and the microwave Doppler sensor 7 may be transmitted to the urinal 1. It may be installed on the back side near the center in the height direction, and radio waves may be transmitted in the horizontal direction or obliquely downward.

  In the present embodiment, a microwave Doppler sensor using a 10.525 GHz microwave has been described. However, the present invention is not limited to this, and the frequency is not limited as long as the microwave is used.

  Further, in the present embodiment, the urinal cleaning device has been described. However, the urinal cleaning device is not limited to this, and may be a Western-style toilet cleaning device 50, an automatic water faucet device 60, or the like as shown in FIG. That is, as long as the configuration shown in FIG. 4 can be applied, any water supply device that automatically performs water supply control using a microwave Doppler sensor may be used. Thus, by applying the present invention to various water supply devices such as a urinal cleaning device, a Western-style toilet cleaning device and an automatic faucet device used in a toilet booth, or a toilet device with an automatic faucet function, In any combination, the influence of the microwave Doppler sensors can be reduced.

It is a figure which shows the urinal washing | cleaning system which is embodiment of this invention. It is a schematic block diagram of the urinal washing device which is an embodiment of the invention. It is a figure which shows the urinal washing | cleaning system which is embodiment of this invention. It is a schematic block diagram of the control part of the urinal washing apparatus shown in FIG. It is a figure which shows the operation example of the microwave Doppler sensor in a predetermined sampling period. It is a figure which shows the example of the Doppler signal which a microwave Doppler sensor outputs. It is a figure which shows the operation example of the microwave Doppler sensor which changed the intermittent operation start timing with the predetermined period. It is a flowchart of a code information generation process. It is a figure which shows the operation | movement relationship of a some microwave Doppler sensor. It is operation | movement explanatory drawing of a target object determination means. It is a flowchart of a target object determination process. It is a figure which shows the example of a code information table. It is a figure which shows the operation | movement relationship of a some microwave Doppler sensor. It is a figure which shows the example of water supply apparatuses other than the urinal washing apparatus.

Explanation of symbols

A Urinal cleaning device 1 Urinal 2 Ball part 3 Water supply path 4 Water supply valve 5 Drainage path 6 Trap line 7 Microwave Doppler sensor 8 Control unit 10 Oscillation circuit 11 Transmission means 12 Reception means 13 Difference detection means 20 Sensor control means 21 Code output means 22 A / D converter 23 Digital filter 24 Object determination means 25 Water supply valve controller

Claims (5)

A urinal, a water supply valve that supplies cleaning water into the ball portion of the urinal, a microwave Doppler sensor that transmits a radio wave toward the ball portion, receives a reflected wave thereof, and generates a Doppler signal; and A urinal wash having a controller that performs human body detection or urine flow detection based on a Doppler signal, controls the water supply valve according to the human body detection or the urine flow detection, and supplies wash water into the ball portion In the device
The controller is
Based on the Doppler signal, a period necessary for determining the human body detection or the urine flow detection is divided into a plurality of periods, and each period is defined as a first period, and the predetermined period from the start of the first period within the first period. Sensor control means for providing a second period of time delay, and for intermittently operating the microwave Doppler sensor n times (n is an integer of 2 or more) at a predetermined sampling period after the second period has elapsed from the beginning of the first period; ,
Object detection means for performing the human body detection or the urine flow detection according to a Doppler signal output from the microwave Doppler sensor,
The sensor control means includes
The urinal cleaning device, wherein the second period is set for each of the first periods. The object detection means includes
The human body detection or the urine flow detection is performed when it is determined that the Doppler signal generated in the first period is data indicating a human body or urine flow continuously in a predetermined period. Urinal cleaning device. The sensor control means includes
The urinal washing device according to claim 1 or 2, wherein the second period is set at random for each of the first periods.   A urinal washing system comprising a plurality of the urinal washing devices according to any one of claims 1 to 3. A microwave microwave Doppler sensor that transmits a radio wave in a predetermined direction and receives a reflected wave thereof to generate a Doppler signal, detects an object based on the Doppler signal, and supplies water according to the detection of the object In a water supply apparatus having a control unit for controlling a valve and supplying water,
The controller is
A period necessary for determining the detection of the object based on the Doppler signal is divided into a plurality of periods, and each period is set as a first period, and the first period is delayed by a predetermined time from the start time of the first period. Sensor control means for providing a second period, and intermittently operating the microwave Doppler sensor n times (n is an integer of 2 or more) at a predetermined sampling period after the second period has elapsed since the start of the first period;
Object detection means for detecting the object according to a Doppler signal output from the microwave Doppler sensor,
The sensor control means includes
The water supply device, wherein the second period is set for each of the first periods.

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