JP3227262B2 - Ultrasonic switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic switch provided in a room such as a toilet.

[0002]

2. Description of the Related Art Conventionally, as a detection switch for automatically turning on / off a lighting in a room by detecting a person entering, staying in, or leaving a room, there is a detection switch that detects a heat ray emitted by a person. . However, such a hot-wire type detection sensor detects the movement of a person due to the characteristics of the pyroelectric element that detects the heat ray. There is a problem that the lighting goes out. Therefore, in general, a timer is used in combination, and the ON state of the illumination is maintained by the timer for a certain period of time.

[0003]

In the case where a timer as described above is provided, there is a problem that if the timer time is lengthened, the illumination is not easily turned off even when a person leaves the room. Other than the hot-wire method, there is a method using an ultrasonic switch. However, the Doppler method has the same problem as the hot-wire method because it only detects movement of a person as in the hot-wire method. Further, in the case of the pulse method for detecting the presence or absence of a person, there is a problem that malfunction occurs when there is an environmental change such as an object being placed in the detection area.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to enter and exit a detected object with respect to a predetermined area by using a single ultrasonic transducer. Another object of the present invention is to provide an ultrasonic switch capable of detecting presence. The object of the invention of claim 2 is that
An object of the present invention is to provide an ultrasonic switch which can be easily mounted on a ceiling panel without a box.

An object of a third aspect of the present invention is to provide a transmitter / receiver according to the second aspect of the present invention so that the direction of a horn of the transmitter / receiver including the ultrasonic vibrator can be freely changed. An object of the present invention is to provide an ultrasonic switch capable of storing a body. A fourth object of the present invention is to provide an ultrasonic switch according to the second aspect of the present invention, which can select and attach a decorative plate according to an atmosphere of a mounting place.

[0006]

According to the first aspect of the present invention, an ultrasonic transducer for transmitting and receiving waves and a first period in which ultrasonic waves are intermittently transmitted from the ultrasonic transducer are continuously transmitted. A transmission control unit for alternately and repeatedly setting a second period to be waved;
A first detection processing unit that outputs a received signal output from the ultrasonic vibrator in a first period as a signal for detecting the presence or absence of a detected object; and a second detection unit that outputs a received signal from the ultrasonic vibrator in a second period. A second detection processing unit that outputs a Doppler signal based on a frequency shift of the output received signal, and a presence / absence of an object to be detected in a presence / absence detection area based on a signal output from the first detection processing unit And a signal processing means for detecting the movement of the detected object into and out of the detection area for movement detection from the Doppler signal output from the second detection processing unit, and generating a switch output for load control based on both detection results. And for transmitting and receiving
Ultrasonic transducer, transmission controller, first and second detection processing
And a switch body containing signal processing means.
The switch body has an embedded hole in the ceiling panel.
Can be fitted from below the ceiling panel to the switch
The mounting frame that projects from the lower part of the body
The holding body that holds the ceiling panel around the embedding hole with the surface
The provided mounting bracket is detachably mounted .

[0007]

According to a second aspect of the present invention, in the first aspect of the present invention, a lower portion of a substantially spherical transducer formed by housing an ultrasonic vibrator is rotatably housed at the bottom of the switch body. The horn at the lower part of the case is exposed to the outside through a window provided in the storage recess . Claim 3
In the invention of claim 1, in the invention of claim 1 , means for detachably attaching a decorative panel is provided on the lower surface of the mounting frame, so that a decorative panel selected from a plurality of decorative panels of different colors can be attached. is there.

[0009]

According to the first aspect of the present invention, a first period in which a single ultrasonic transducer is used to operate as a pulse type ultrasonic switch and a second period in which a single Doppler type ultrasonic switch is operated. Can be set alternately, and it is possible to detect the presence / absence and presence / absence of the detected object in the predetermined area, so that the load control is automatically performed only when the detected object is present in the predetermined area. Can
For example it is not necessary to use a timer or the like in the case of the illumination on / off toilet, moreover Ri only Do is possible to light the illumination when the person without being affected by the environment and occupancy, And to attach the mounting bracket to the mounting frame
Easier boxless installation on ceiling panels
Can Ru to.

According to a second aspect of the present invention, in the first aspect of the present invention, the transmitter / receiver body is housed so that the direction of the horn of the transmitter / receiver including the ultrasonic vibrator can be freely changed. be able to.

According to the third aspect of the present invention, the decorative plate can be selected and mounted according to the atmosphere of the mounting location, and can be matched to the mounting location.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall circuit configuration of an embodiment for the purpose of automatic control of toilet lighting L and ventilation fan F. In this embodiment, a signal operation processing unit 1 comprising a microcomputer for overall signal processing and control. And an ultrasonic transducer 2 for transmitting and receiving waves, and an ultrasonic signal for driving the ultrasonic transducer 2 is oscillated, and is transmitted to the ultrasonic transducer 2 based on a transmission control signal from the signal processing unit 1. An oscillating unit 3 for transmitting an ultrasonic pulse by intermittently applying a sound wave signal or transmitting a continuous ultrasonic wave by continuously applying a sound wave signal, and a first period for intermittently transmitting an ultrasonic wave And a pulse detection processing unit 4 for detecting and outputting a received signal of the reflected wave received by the ultrasonic transducer 2, and between the received signal of the reflected wave received by the ultrasonic transducer 2 and the transmitted signal. To output Doppler signals X and Y having different phases due to the frequency shift of The detection processing unit 5, the relay driving units 6 and 7 that drive a relay with a control signal from the signal calculation processing unit 1, and the relay driving units 6 and 7 that are automatically controlled based on the signals of the detection processing units 4 and 5. It is possible to automatically control the lighting of the light L by an operation changeover switch 8 for setting whether to perform the off drive or the on drive regardless of the detection, and the relay contact r ₁ of the relay driven by the relay drive unit 6. an operating illuminance adjustment switch 9 for determining the illuminance, the illuminance sensor 10, a relay contact r ₂ of the relay driven by the relay drive unit 7 on / off is for setting the delay off time of ventilators F is A reset I for resetting the ventilation fan delay adjustment unit 11, the operation display LED 12, the DC stabilized power supply unit 13, and the signal operation processing unit 1 when the power supply is turned on.
C14 and a clock oscillator 15 for providing a basic clock to the signal operation processing unit 1. Each of the detection processing units 4, 5, the operation changeover switch 8, the operation illuminance adjustment switch 9, and the ventilation fan delay adjustment unit 11 is provided. The signal output terminal is connected to a predetermined input port of the signal processing unit 1 and the relay driving unit 6
7. The operation display LEDs 12 are respectively connected to predetermined output ports of the signal processing unit 1.

FIGS. 2 to 4 are views showing the structure of the embodiment. The switch of this embodiment has a disk-shaped mounting frame 20 and an upper surface integrally provided at the center of the mounting frame 20. FIG. The switch body 21 is composed of the opening body 21a and the cover 21b attached to the upper surface opening of the body 21a, and the print wiring boards 17a and 17b, in which the above-mentioned circuit member is mounted in the switch body 21, and The wave transmitter / receiver 16 including the ultrasonic vibrator 2 and the like is mounted.

The body 21a is provided with a storage recess 23 having a circular cross section on the upper surface side by bulging a bottom center portion downward.
A round window 2 penetrating inward and outward is provided at the central bottom of the storage recess 23.
2 and the lower part of the transducer 16 is fitted so that the transmitting and receiving opening of the horn 24 of the transducer 16 faces outside from the round window 22. The transducer 16 is configured by housing the ultrasonic vibrator 2 inside a body comprising a substantially hemispherical horn 24 and a substantially hemispherical rotating body 25 attached to the upper opening of the horn 24. Shafts 28 project from both sides of the horn 24 housed in the housing recess 23, and the shaft 28 is vertically movable in a vertical groove 59 provided on the inner peripheral surface of the housing recess 23. And is rotatably inserted around the axis so that the direction of the transducer 16 can be changed. The ultrasonic vibrator 2 is housed in a housing in a form housed in a cylindrical cushion body 26 so that vibration from the horn 24 and the rotating body 25 is not transmitted.

Above the storage recess 23, a U-shaped holding member 29 is screwed to the bottom of the body 20 so as to bridge on both sides of the storage recess 23. The horn 24 is pressed against the rib 33 provided on the inner surface of the storage recess 23 because the upper part of the rotating body 25 is pressed downward by the support 31 attached so as to be urged via the O-ring 32 made of an elastic body. And
The rotation position of the transducer 16 can be held.

The support 31 has a shaft 31a at the center of the upper surface, and legs 31b projectingly provided on both upper surfaces of the shaft 31a.
The coil spring 30 is inserted into the shaft 31a, and its tip is vertically movably inserted into the center hole 29a of the holding metal 29, and the leg 31b is vertically movably inserted into the holes 29b provided on both sides of the hole 29a. The spring 30 is always urged downward by the elastic force. The leg 31b is provided with a locking projection 31c at the tip so as not to fall out of the hole 29b.

The printed wiring boards 17a and 17b are upper and lower
Placed in the cover 21b so as to be overlapped
The upper printed wiring board 17a has a lock spring on the upper surface.
35 and a release button 36 for releasing the locked state
The terminal plate 37 constituting the child is mounted in three pairs, and
Relay Ry driven by relay drive units 6 and 7₁, Ry _Two
Is mounted on the printed circuit board 17b.
The road is electrically connected by a flat cable 38. Mosquito
On one side of the bar 21b, a wire insertion port 2 corresponding to a quick-connect terminal
7a and a release jig insertion slot 27b corresponding to the release button 36
And a terminal cover 19 is provided at this location.
It is designed to be detachably attached. 19a is a terminal
A locking leg projecting downward from both sides of the bar 19;
Removably engages with the locking hole 63 provided in the bar 21b.
To fix the terminal cover 19 to the cover 21b.
Things.

The quick connection terminals of each pair include terminals 60, 60 for connecting the AC power supply AC in FIG. 1, load terminals 61, 61 for connecting the lighting L, and load terminals 62, 61 for connecting the ventilation fan F. 62. Also, in FIG.
Although only the number of release buttons 36 corresponding to the pair of terminal plates 37 are shown in the figure, the locking spring 35 and the release button 36 are actually provided corresponding to each pair of terminal plates 37. Needless to say,

The lower printed wiring board 17b is connected to a lead wire from the ultrasonic transducer 2 led out from a notch 25a provided in the rotating body 25 of the transducer 16 to connect the ultrasonic transducer 2
Is connected to the circuit section. The cover 21b is the body 21a
Of the body 21
a projecting piece 34 above the upper end of both side walls of the
a into the longitudinal grooves 39 formed on both side surfaces of the
4, a coupling projection 39a provided in the lower part of the vertical groove 39 is coupled to the coupling hole 34a, and the cover 21b
And the body 21a.

At this time, the operation display LED mounted on the lower printed wiring board 17b housed in the cover 21b
12 and the light receiving surface of the illuminance sensor 10
Opposed to the incident surface and the outgoing surface provided on the prism 40 mounted on the side 1a, light for luminescent display can be led out or external light can enter through the prism 40. The prism 40 is formed in an inverted L shape, and is fixed by fitting bosses 18 protruding from the bottom surface of the body 21a into holes of the mounting portions 40a provided on both sides of the corners. The lower end is exposed to the lower surface side of the body 21a by fitting into the window hole 41 opened along the inner peripheral surface of the concave portion 23. The corner of the boundary between the horizontal piece and the hanging piece of the prism 40 is an inclined surface of a half-mirror structure, and the light incident from the lower end of the hanging piece is emitted out of the half mirror from this half mirror part to face the prism. The illuminance sensor 10 receives light. On the other hand, the tip of the horizontal piece has an inclined surface cut at 45 °, and the light from the operation display LED 12 disposed opposite to the upper surface of the tip of the horizontal piece is totally reflected by the inclined surface inside the prism and bent. The light is reflected by the half mirror portion and emitted from the tip of the hanging piece to the outside.

The mounting frame 20 is provided with mounting holes 42 at both ends for direct attachment to a switch box or a ceiling panel, and mounting brackets 43 for holding the ceiling panel are detachably mounted on both upper surfaces. A mounting part is provided. Further, a decorative plate 50 is detachably mounted on the lower surface. The mounting bracket 43 is a box-less mounting that can be mounted in an embedding hole formed in a ceiling panel, and is a vertically long metal fitting body 44 having one side opened.
And a screw body 4 which penetrates through the bottom of the metal fitting body 44 from below and has its tip rotatably held on the ceiling of the metal fitting body 44.
5 and a metal holding member 46 in which a screw portion of a screw body 45 is screwed into a screw hole. Mounting on the mounting frame 20 is performed as follows.

First, the head of the screw body 45 is fitted into the round hole of the Daruma hole 47 formed in the mounting frame 20 from the upper surface side of the mounting frame 20 to be exposed on the lower surface side of the mounting frame 20.
At the same time, fixing pieces 49 provided on both lower surfaces of the fitting body 44 are fitted into fixing grooves 48 provided on the upper surface of the mounting frame 20 in parallel with both sides of the darling hole 47. In this state, the fixing piece 49
When the metal fitting body 44 is moved toward the center of the mounting frame 20 while sliding the
The screw portion of the screw body 45 exposed from the lower surface of the screw body 45 is guided by the long hole of the daruma hole 47, and the mounting frame 20 is sandwiched between the lower surface of the fitting body 44 and the head of the screw body 45. Further, the fixing piece 49 is interposed between the locking piece provided in the fixing groove 48 and the bottom of the fixing groove 48, and the mounting of the mounting bracket 43 to the mounting frame 20 is completed.

The decorative plate 50 has an upper surface provided with a concave flat surface 51 into which the mounting frame 20 is fitted. On both sides of an inner surface of a peripheral wall 51a surrounding the concave flat surface 51, locking projections 20a projecting from the peripheral edge of the mounting frame 20 are provided. An engagement groove 52 for engaging the engagement protrusion 20a is provided. The engagement protrusions 20a and 20b can be detachably attached using the tapered surfaces of the engagement protrusions 20a and 20b, the elasticity of the decorative plate 50, and the elasticity of the mounting frame 20. It is designed to be locked in the locking groove 52. The positioning of the locking position of the locking projections 20a and 20b with respect to the locking groove 52 is determined by the locking projection 20.
a, a projection 20c provided at the center between the peripheral walls 5a and 20a.
This is performed by fitting into the concave portion 51b formed in 1a. The round hole 50a at the center of the decorative plate 50 is for exposing a bulging portion projecting from the lower surface at the center of the body 21a to the outside. Note that a plurality of decorative plates 50 of different colors are prepared and can be made to correspond to the color of the ceiling at the installation location.

In this embodiment constructed as described above, the mounting bracket 43 or the mounting hole 4 is mounted on the ceiling of a toilet or the like.
Attach and fix using 2. Here, a method of mounting the switch body 21 on the ceiling using the mounting bracket 43 will be briefly described. First, the mounting bracket 43 is fitted in a notch 44a formed on one side wall of the metal fitting body 44 on the side opposite to the tightening direction of the screw body 45, and the holding body 46 is made parallel to the side surface of the switch body 21 so that the switch body 21 is moved. When it is fitted into the embedded hole formed in the ceiling panel,
6 is out of the way. In other words, the cross-sectional shape of the switch body 21 is a shape obtained by cutting both sides of the circle, and the diameter of the embedding hole provided on the ceiling panel side is formed so as to correspond to the diameter of the circle forming the switch body 21. Therefore, the portion corresponding to the above-mentioned cut portion becomes an empty space,
The state in which the front end of the holding body 46 of the mounting bracket 43 arranged in this space portion is inserted so as not to protrude from this empty space is the state in which the holding body 46 is fitted into the notch 44a.

Next, a switch body 2 is provided on the upper side of the ceiling panel.
1 and the mounting bracket 43 are protruded through the embedding hole, and the head of the screw body 45 exposed on the lower surface side of the ceiling panel is used with the upper surface of the mounting frame 20 in contact with the lower surface of the ceiling panel. When the screw body 45 is rotated in the tightening direction by a screwdriver or the like, the rotation of the screw body 45 causes the holding body 46 to come out of the notch 44 a, and the side end of the holding body 46 hits the other side wall of the bracket main body 44. In other words, the tip of the holding body 46 faces in the direction orthogonal to the side surface of the switch body 21, and at this time, the tip of the holding body 46 goes out of the projection range of the embedding hole and is located above the ceiling panel.

If the screw body 45 is further rotated in the tightening direction, the holding body 46 is downwardly lowered because the rotation of the holding body 46 is restricted, and the tip of the holding body 46 eventually reaches the upper surface of the ceiling panel. , The ceiling panel is sandwiched between the mounting frame 20 and the switch body 2 with respect to the ceiling panel.
1 is fixed. After the switch body 21 is fixed to the ceiling panel, if the decorative plate 50 is attached to the lower surface of the mounting frame 20, the mounting of the ultrasonic switch of the present embodiment is completed, and the terminals 60 to 62 using the quick connection terminals are completed. If the AC power supply AC, the lighting L, and the ventilation fan F are connected, the electric wiring work is completed.

Next, the ultrasonic switch of this embodiment is connected to the toilet 70.
The operation when the device is arranged on the ceiling will be described with reference to FIGS. First, in use, the operation mode of the operation selector switch 8 exposed on the lower surface of the mounting frame 20 is set to set the operation mode. Here, it is assumed that the setting is automatic. Similarly, the operating illuminance adjustment switch 9 exposed on the lower surface of the mounting frame 20 is operated to reduce the operating illuminance to 20 lx.
Or 40lx. Here, it is assumed that it is set to 20 lx.

In the state set as described above, FIG.
When the operation is started by turning on the power as shown in FIG. 5A, the oscillating unit 3 starts oscillating the ultrasonic signal and the reference oscillation signal as shown in FIG. On the other hand, the signal operation processing unit 1
5 starts the operation in the initial setting state, and transmits the signal without giving an ultrasonic wave transmission control signal to the oscillating unit 3 for three seconds, for example, as shown in FIG. The waves are left stationary as shown in FIG. Well 3
After elapse of seconds, the signal operation processing unit 1 sends the relay contacts r ₁ and r ₁ to the relay driving units 6 and 7 as shown in FIG.
An off signal for driving off the relays Ry ₁ and Ry ₂ is provided so that the relay ₂ is turned off, and the lighting L and the ventilation fan F are set to the off state.

Next, the signal operation processing section 1 judges the state of the operation changeover switch 8, and if it is manually turned off, the relay contact r
Control to keep the off state of ₁ and r ₂ and, on the contrary, to drive the relays Ry ₁ and Ry ₂ to the relay drive units 6 and 7 so that the relay contacts r ₁ and r ₂ are turned on if they are on side. Give a signal. Here, since the setting is set to automatic, the signal calculation processing unit 1 checks the setting state of the operation illuminance changeover switch 9 and compares the set value with the illuminance sensor 10 shown in FIG.
If the detected illuminance is not equal to or less than the set value, the detection by the ultrasonic wave is invalidated, and the above-described OFF state is maintained. If the value is equal to or less than the set value, the state enters a state in which the detection of the ultrasonic switch is enabled.

When the above-mentioned three seconds have elapsed, the signal operation processing section 1 intermittently applies the ultrasonic signal to the ultrasonic vibrator 1 to the oscillating section 3 and the period for continuously applying the ultrasonic signal. A transmission control signal for alternately setting the stabilization standby periods is output as shown in FIG. The oscillating unit 3 receives the transmission control signal and sends a transmission drive signal to the ultrasonic vibrator 1 as shown in FIG. 5 (e). The ultrasonic wave is transmitted to start the detection operation. FIGS. 5F and 5G show Doppler signals X and Y having different phases output from the Doppler detection processing unit 5 based on the received signal of the reflected wave received by the ultrasonic transducer 2. FIG. 5H shows a pulse signal output from the pulse detection processing unit 4 corresponding to a received signal of a reflected wave when an ultrasonic wave is intermittently transmitted.

Immediately after the start of the detection operation, the signal calculation processing unit 1 stores the output signal pattern output by the pulse detection processing unit 4 in the second period as the initial value of the reflected wave pattern from the fixed object in the toilet. I do. Now, the detection operation is started, and as shown in FIG.
In the state where no moving object is present, the moving object is not present in the detection area A of the moving object, so that the moving signal by the Doppler detection does not exist as shown in FIG. The reflected wave pattern shown in (B) of FIG. 6A for the intermittent transmission does not change from the stored initial value, and therefore, the signal processing unit 1 determines that the person M is not in the toilet 70, and Ry ₁ and Ry ₂ are kept off.

Next, when the door 71 of the toilet 70 is opened as shown in FIG. 6B, while the door 71 is in the moving object detection area A, the Doppler signal output from the Doppler detection processing unit 5 X and Y are shown in FIG.
The movement signal is included as shown in FIG. When the movement signal is detected, the signal calculation processing unit 1 outputs the signal output from the pulse detection processing unit 4 before the movement signal is detected.
The reflected wave pattern shown in (B) of (b) is stored as an environment value, and when the amount of the movement signal becomes equal to or larger than the threshold value, the signal calculation processing unit 1 sends the relays Ry ₁ and Ry to the relay driving units 6 and 7.
Provides a control signal for turning on drive _2, as shown in FIG. 5 (i), the relay contact r ₁ of each relay Ry _1, Ry _2, r
Turn on ₂ . When these lights are turned on, the illumination L is turned on, and the ventilation fan F performs a ventilation operation. At the same time, as shown in FIG. 5 (k), a signal for driving the operation display LED 12 is output and turned on to indicate that the operation is being performed.

Further, when the person M moves into the toilet 70 as shown in FIG. 6C, the detection of the movement signal continues as shown in FIG. When the person M enters the area B, the signal calculation processing unit 1 determines that the person M exists because the reflected wave pattern detected during the period is different from the environmental value as shown in FIG. When the presence detection is performed, the presence detection is prioritized, and the relays Ry ₁ and Ry are set.
Continue ON drive of ₂ . Simultaneous operation display LED
12 flashes.

Next, the door 71 is closed, and the person M moves to the toilet side as shown in FIG.
In the state where the movement is proceeding as shown in (d), the detection of the movement signal continues as shown in (A) of FIG. 6 (d), and the presence detection also continues as shown in (B) of FIG. 6 (d). . Then toilet 72
When the person M sits as shown in FIG. 6 (e) and enters a stationary state, the detection of the movement signal is lost as shown in FIG. 6 (e), but as shown in FIG. 6 (e). As above, person M
, The presence detection takes precedence, and the relays Ry ₁ and Ry ₂ are similarly turned on.

In this stationary state, the movement signal is of course detected if the head or hand moves slightly even if the head or hand does not move completely. Now, when the person M goes out of the toilet 70, as shown in FIG.
The person M first exits from the detection area B, and at this point, the presence detection is lost as shown in FIG. Since the detection of the movement signal is performed as shown in (A) of (1), the detection of the movement is prioritized, and the ON driving of the relays Ry ₁ and Ry ₂ is further continued. When the movement signal is detected but the presence is not detected, the lighting state of the operation display LED 12 is switched to continuous lighting.

Then, when the person M exits the detection area A as shown in FIG. 6 (g) and the door 71 is closed and closed, the movement signal of the movement signal as shown in FIG. Since the detection disappears, the signal operation processing section 1 gives a signal for turning off the relays Ry ₁ and Ry ₂ to each of the relay driving sections 6 and 7 after turning off the delay time from this point, and turns off the operation display LED. It is. At this time, the reflected wave pattern due to the ultrasonic pulse has returned to the environmental value pattern as shown in FIG.

The stop of the ventilation fan F at this time is determined by the off-delay time set by the ventilation delay adjustment unit 11 by the illumination L.
Will be delayed from the time of turning off the light. 6 (f) and 6 (g), when the reflected wave patterns are the same before and after the movement signal is detected, it can be determined that the person M is moving outside the detection area B. If the reflected wave pattern at the time is different from the initial environmental value,
This reflected wave pattern is stored as a new environment value. In this case, for example, an off-delay time of 30 seconds is set, and if the presence detection is performed again after the elapse of the off-delay time, the relays Ry ₁ and Ry ₂ are continuously driven to be turned on based on the presence detection. In other words, taking into account the actions of a plurality of persons M,
It is possible to cope with a situation where one person stands still and another person goes out of the detection area A.

FIG. 7 is a flowchart showing the above operation.

[0039]

According to the first aspect of the present invention, there is provided an ultrasonic transducer for transmitting and receiving waves, a first period in which ultrasonic waves are transmitted intermittently from the ultrasonic transducer, and a second period in which the ultrasonic waves are transmitted continuously. A transmission control unit for alternately and repeatedly setting a period of time, and a first detection of outputting a reception signal output from the ultrasonic transducer in the first period as a signal for detecting the presence or absence of a detected object A processing unit, a second detection processing unit that outputs a Doppler signal based on a frequency shift of a received signal output from the ultrasonic transducer in a second period, and a signal output from the first detection processing unit The presence / absence of the detected object is detected in the detection area for presence / absence, and the detection / entry of the detected object into / from the detection area for movement detection is detected based on the Doppler signal output from the second detection processing unit. Signal processing for generating a switch output for load control based on the Means, ultrasonic transducer for transmitting and receiving waves, feed
Wave control unit, first and second detection processing units, and signal processing unit
And a switch body containing the steps.
Do the embedded holes in the well panel
It protrudes from the lower periphery of the switch body.
The mounting frame has a buried hole around the top of the mounting frame.
Mounting bracket with a holding body to hold the ceiling panel
It is characterized by being detachably mounted , using one ultrasonic transducer, a first period of operation as a pulse type ultrasonic switch and a second period of operation as a Doppler type ultrasonic switch. It can be set alternately, and it can detect the entrance and exit of the detected object in the predetermined area and the presence or absence of the detected object, so that the load control can be automatically performed only when the detected object is present in the predetermined area. Done,
For example, when turning on / off the lighting of a toilet, there is no need to use a timer or the like, and the lighting can be turned on only when a person is present without being affected by the environment. There is. In addition, switch body
Do the embedded holes in the well panel
It protrudes from the lower periphery of the switch body.
The mounting frame has a buried hole around the top of the mounting frame.
Mounting bracket with a holding body to hold the ceiling panel
Since it was detachably mounted, attach the mounting bracket to the mounting frame
This makes it possible to mount it on a ceiling panel without a box.
There is also an effect that can be easily performed.

[0040]

According to a second aspect of the present invention, in the first aspect of the present invention, the lower portion of the substantially spherical transducer formed by accommodating the ultrasonic transducer is rotatably housed at the bottom of the switch body. Since the horn at the lower part of the body is exposed to the outside through the window provided in the storage recess, the direction of the horn of the transducer with the built-in ultrasonic vibrator can be freely changed. There is an effect that the transmitter / receiver body can be stored in the housing.

According to a third aspect of the present invention, in the first aspect of the present invention, means for detachably attaching a decorative panel is provided on a lower surface of the mounting frame, and a decorative panel selected from a plurality of decorative panels of different colors is provided. Since it is possible to attach the decorative plate, the decorative plate can be selected and attached in accordance with the atmosphere of the installation location, and there is an effect that it can be matched to the installation location.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3A is a side view of the same. (B) is a bottom view with the decorative plate removed therefrom.

FIG. 4A is a front view of the same. (B) is a bottom view of the state where the decorative plate was attached.

FIG. 5 is a timing chart for explaining the above operation.

FIG. 6 is an operation explanatory diagram of the usage example of the above.

FIG. 7 is a flowchart for explaining the above operation.

[EXPLANATION OF SYMBOLS] 1 signal processing unit 2 ultrasonic transducer 3 oscillating unit 4 pulse detection processing unit 5 Doppler detection processing unit 6 relay driver L illumination F Ventilator r _1, r ₂ relay contacts

Continuation of the front page (56) References JP-A-4-83190 (JP, A) JP-A-56-50020 (JP, A) JP-A-63-127174 (JP, A) Jpn. , U) Japanese Utility Model Application Hei 6-85600 (JP, U) Japanese Utility Model Application Hei 6-65885 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01S ^7/ 52-7/64 G01S 15/00-15/96 H03K 17/945

Claims (3)

(57) [Claims] 1. An ultrasonic transducer for transmitting and receiving waves, a first period in which ultrasonic waves are intermittently transmitted from the ultrasonic transducer, and a second period in which ultrasonic waves are continuously transmitted are alternately repeated. A transmission control unit to be set; a first detection processing unit that outputs a reception signal output from the ultrasonic transducer during a first period as a signal for detecting the presence or absence of a detected object; and a second detection processing unit. A second detection processing unit that outputs a Doppler signal from a frequency shift of a received signal output from the ultrasonic transducer during a period,
The presence / absence of the detected object is detected in the presence / absence detection area from the signal output from the first detection processing unit, and the detection of the presence / absence of the object to the movement detection area is detected from the Doppler signal output from the second detection processing unit. A signal processing unit for detecting the entrance and exit of the detection object and generating a switch output for load control based on both detection results , a transmission / reception ultrasonic vibrator, a transmission control unit, a first and a second
2 containing a detection processing unit and a signal processing unit
The switch body is provided on the ceiling panel.
It is fitted into the embedded hole from the bottom side of the ceiling panel,
Install the mounting frame protruding from the lower periphery of the switch body.
Hold the ceiling panel around the embedding hole with the top of the mounting frame
An ultrasonic switch characterized in that a mounting bracket provided with a holding body is detachably mounted . 2. An ultrasonic vibrator is provided at the bottom of the switch body.
The lower part of the body of the substantially spherical transducer
Window provided in the storage recess
2. The ultrasonic switch according to claim 1, wherein a horn at a lower part of the body is exposed to the outside . 3. A decorative panel can be detachably attached to the lower surface of the mounting frame.
Provide a means to attach, from multiple decorative panels of different colors
Ultrasonic switch according to claim 1, characterized in that it comprises a selected decorative panel as an attachable.