JP2008236238A - Heat wave type wireless transmitter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless transmitter appropriately controlling lighting equipment even in the case of simultaneously detecting a person by the plurality of wireless transmitters. <P>SOLUTION: A control part 14 in the wireless transmitter 10 generates and transmits two lighting signals for controlling the lighting equipment at a random time interval, and generates and transmits an extension signal for extending the driving time of the lighting equipment at a random time interval from transmission of the first lighting signal after transmitting the second lighting signal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hot-wire wireless transmitter that transmits a radio signal to an object to be controlled in response to detection of a heat ray radiated from a human body, and is particularly installed in a place where people come and go such as stairs and hallways. The present invention relates to a hot-wire wireless transmitter that is suitable for application to a transmitter that transmits a control signal for controlling a luminaire.

  Conventionally, lighting that controls a lighting fixture by detecting the presence of a person in a detection area and transmitting a control signal such as the detection signal from a transmitter via a predetermined communication line (wired) There is a device. This type of lighting device has an advantage that communication reliability is very high and a control signal can be reliably transmitted. However, such an illuminating device requires a construction work for connecting all the transmitters and the luminaires via a communication line, and there is a problem that it is very time-consuming.

  In order to solve such a problem, a lighting device that controls a lighting device by transmitting a control signal from the transmitter to the lighting device through simple wireless communication using infrared rays or the like is proposed. Has been. Such an illuminating device does not require construction work for connecting the transmitter and the luminaire via the communication line, and thus has an advantage that it does not take time and effort.

Further, as a wireless communication method for the lighting device, a method using radio waves has been proposed in addition to communication using infrared rays or the like (see, for example, Patent Document 1). Communication using radio waves has an advantage that it can reduce the problem of directivity depending on the performance of the antenna and can pass through a shielding object such as a wall.
JP 2006-93049 A

  By the way, in houses and the like, a plurality of lighting fixtures are provided in accordance with the movement of a person by expanding the human detection area and improving the degree of freedom in setting the detection area by installing the wireless transmitters by wireless communication described above at a plurality of locations. In many cases, control is performed such as sequentially turning on the lights. In such an aspect, a plurality of people present in different places may be detected simultaneously by different wireless transmitters. In such a case, in the lighting device, since the control signals for turning on the lighting fixtures are simultaneously output from each wireless transmitter, the respective control signals interfere with each other at the receiver that receives the signals, There has been a problem in that the arrival of the control signal cannot be recognized and the lighting apparatus cannot be turned on.

  Also, in the lighting device, an extension signal for extending the lighting time of the lighting fixture is transmitted from the wireless transmitter according to the movement of the person, but when a control signal is simultaneously transmitted from a plurality of wireless transmitters. Since the extension signals are also transmitted at the same time interval, the extension signals interfere with each other at the receiver, and as a result, the arrival of the extension signals cannot be recognized and the luminaire cannot be controlled. There was a problem of inviting a situation.

  Therefore, the present invention has been devised to solve the above-described problems, and even when a person is detected at the same time by a plurality of wireless transmitters, not only a control signal but also an extension signal can be used. An object of the present invention is to provide a hot-wire wireless transmitter that can be surely recognized by a receiver and appropriately control a lighting apparatus.

  The wireless transmitter according to the present invention generates and transmits two control signals for controlling a controlled object at random time intervals, and after transmitting the second control signal, drives the controlled object. The above-mentioned problem is solved by generating and transmitting an extension signal for extending the time at random time intervals from the transmission of the first control signal.

  In addition, the wireless transmitter according to the present invention solves the above-described problem by transmitting a shortened code having a shorter time length as a control signal and an extension signal than a control signal and an extension signal of a regular code.

  According to the hot wire wireless transmitter according to the present invention, even when a person is detected by a plurality of wireless transmitters at the same time, it is possible to prevent the control signal and the extension signal from interfering in the receiver. The control object can be appropriately controlled.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  For example, as shown in FIG. 1, this embodiment is a wireless transmitter 10 that is suitable for application to a lighting device that controls a plurality of lighting fixtures as control objects installed in each room, hallway, or the like. When the wireless transmitter 10 is installed at a plurality of locations and detects that a person is present in each detection area, the wireless transmitter 10 sends a lighting signal for lighting the lighting fixture or an extension signal for extending the lighting duration of the lighting fixture. The lighting apparatus is controlled by transmitting to the receiver 20 via wireless communication such as infrared rays.

  In the figure, a state in which two wireless transmitters 10a and 10b are installed is shown. In the case of such an installation mode, the wireless transmitter 10a installed in the corridor detects the presence of a person when, for example, a person passes through the entrance from the LDK and goes outside, thereby illuminating the LDK. After lighting the appliance, a lighting signal and an extension signal are transmitted so as to smoothly turn on the front lighting fixture. Also, in the figure, the wireless transmitter 10b installed at the entrance lights the entrance lighting fixture by detecting the presence of a person, for example, when a person entering the entrance from outside moves to the LDK. After that, a lighting signal and an extension signal are transmitted so that the LDK luminaire is smoothly turned on.

  As shown in FIG. 2, the wireless transmitter 10 includes a power source 11 that supplies driving power, a human sensor 12 that detects the presence or absence of a person, a brightness sensor 13 that detects ambient brightness, a lighting signal, A control unit 14 that generates an extension signal, a switch 15 that is driven based on the lighting signal and the extension signal generated by the control unit 14, and an infrared LED (Light Emitting Diode) 16 that emits infrared light.

  The power source 11 is made of, for example, a battery and supplies driving power for the wireless transmitter 10.

  The human sensor 12 is made of, for example, a pyroelectric element, and detects the presence or absence of a person by detecting a change in heat rays emitted from a human body existing in the detection region. When the presence sensor 12 detects the presence of a person, the detection signal is supplied to the control unit 14.

  The brightness sensor 13 is made of, for example, a phototransistor or the like, and detects ambient brightness. When the brightness sensor 13 detects brightness less than a predetermined illuminance, the detection signal is supplied to the control unit 14.

  The control part 14 consists of microcomputers etc., for example, and produces | generates a lighting signal based on the detection signal supplied from the human sensitive sensor 12. FIG. In addition, after transmitting the lighting signal, the control unit 14 generates an extension signal based on the detection signal supplied from the human sensor 12 or the detection signal supplied from each of the human sensor 12 and the brightness sensor 13. To do. Specifically, the control unit 14 is based on only the detection signal supplied from the human sensor 12 in the case of a type in which the lighting fixture is continuously turned on when there is a person regardless of the surrounding brightness. Generate an extension signal. In addition, the controller 14 is a human sensor 12 and a brightness sensor in the case of a type in which the lighting fixture is continuously turned on only when the ambient brightness is less than a predetermined illuminance and there is a person, such as at night. An extension signal is generated based on the detection signal supplied from each of 13. The control unit 14 supplies the generated lighting signal and extension signal to the switch 15.

  The switch 15 is composed of a switch element such as a transistor, for example, and is driven to light the infrared LED 16 based on the lighting signal and the extension signal generated by the control unit 14.

  The infrared LED 16 emits infrared light as the switch 15 is driven based on the lighting signal and the extension signal generated by the control unit 14. Thereby, the lighting signal and the extension signal are transmitted. The lighting signal and the extension signal emitted by the infrared LED 16 reach the receiver 20 by infrared communication, and are used for controlling the lighting fixture.

  Such a wireless transmitter 10 generates a lighting signal and an extension signal by the control unit 14 in the following manner, so that even if a plurality of wireless transmitters 10 detect a person at the same time, The unit 20 prevents the lighting signal and the extension signal from interfering with each other.

  That is, the wireless transmitter 10 continuously generates and transmits two signals as lighting signals by the control unit 14. At this time, the wireless transmitter 10 randomly changes the time interval from the transmission of the first lighting signal to the transmission of the second lighting signal in a predetermined time range of, for example, 30 milliseconds to 200 milliseconds.

  In order to explain this specifically, let us consider a case where a person is simultaneously detected by each of the two wireless transmitters 10a and 10b. In this case, each of the wireless transmitters 10a and 10b simultaneously detects the first lighting signal by the control unit 14 as the human sensor 12 detects the person at the same time, as indicated by a broken line part a in FIG. Accordingly, a lighting signal is simultaneously transmitted from the infrared sensor 16 for a time length of, for example, 8 milliseconds.

  After that, one wireless transmitter 10a generates a second lighting signal by the control unit 14 after the elapse of 80 milliseconds from the transmission of the first lighting signal, and continuously transmits it via the infrared sensor 16. To do. On the other hand, the wireless transmitter 10b generates a second lighting signal by the control unit 14 after the elapse of 100 milliseconds from the transmission of the first lighting signal, and transmits the second lighting signal continuously via the infrared sensor 16.

  In this case, even if the receiver 20 cannot recognize the first lighting signal transmitted from each of the wireless transmitters 10a and 10b, the receiver 20 can reliably receive and recognize the second lighting signal. Can do. Therefore, the receiver 20 can cancel the first lighting signal and control the lighting fixture based on the second lighting signal.

  Further, the wireless transmitters 10a and 10b have a time interval from the transmission of the first lighting signal to the transmission of the extension signal as shown by the broken line part b in FIG. It is changed randomly within a predetermined time range.

  Thereby, since the receiver 20 can receive and recognize the extension signal transmitted from each of the wireless transmitters 10a and 10b with certainty, the lighting apparatus can be controlled based on these extension signals.

  Note that the time interval from the transmission of the first lighting signal to the transmission of the extension signal can be determined according to the minimum lighting driving time of the lighting fixture that can be set in the wireless transmitter 10. Specifically, in the wireless transmitter 10, when the minimum lighting drive time of the luminaire that can be set is 10 seconds, the time interval from the transmission of the first lighting signal to the transmission of the extension signal, By setting the time from about 5 seconds to about 5.5 seconds, even if the receiver 20 cannot recognize the first extension signal, the second extension signal can be reliably received and recognized.

  As described above, the wireless transmitter 10 continuously transmits two lighting signals at random time intervals and transmits an extension signal at random time intervals from the transmission of the first lighting signal. Thereby, even if communication by the 1st lighting signal fails, the wireless transmitter 10 can perform reliable communication about the 2nd lighting signal and an extension signal.

  In the description shown in FIG. 3, the time length of one lighting signal and extension signal is 8 milliseconds, but in the case of a regular code, the lighting signal and extension signal are as shown in FIG. In addition, it is a signal composed of 48 bits having a time length of about 80 milliseconds. In the wireless transmitter 10, when such a regular code is used, since the time length of one signal is long, even if each wireless transmitter 10 transmits a lighting signal and an extension signal at random time intervals, Duplication is likely to occur. Further, in the wireless transmitter 10, for example, as shown in FIG. 5, in order to transmit two lighting signals so that the signals do not overlap, the time interval for transmitting these two lighting signals is 160 ms or more. In addition, it is necessary to make the time larger than twice the time length of one signal. Therefore, in the wireless transmitter 10, when the first lighting signal is duplicated, the time lag until the lighting apparatus is turned on by the second lighting signal is large, and there is a possibility that the user may feel uncomfortable. There is sex.

  Therefore, in the wireless transmitter 10, as shown in FIG. 6, for example, a shortened code having a shorter time length than the regular code, such as a signal consisting of 5 bits having a time length of about 8 milliseconds, is used as a lighting signal and an extended signal. It is desirable to use it. In this way, in the wireless transmitter 10, the use of the shortened code makes it difficult for the lighting signal and the extension signal to overlap, and for example, as shown in FIG. In order to transmit a signal, the time interval for transmitting these two lighting signals may be at least 16 milliseconds, and even if the first lighting signal is duplicated, the lighting device is illuminated by the second lighting signal. The time lag before turning on can be significantly reduced, and the user's sense of security can be improved.

  Furthermore, in the wireless transmitter 10, by using the shortened code, it is possible to increase the number of patterns of the time intervals of the two lighting signals, so that the probability of overlapping can be reduced.

  That is, in the wireless transmitter 10, in order to transmit two lighting signals so that the signals do not overlap when a regular code is used, for example, as shown in FIG. 8, the first lighting signal rises. The time interval T from the fall to the rise of the second lighting signal needs to be equal to or longer than the time length of one lighting signal. Therefore, in the wireless transmitter 10, it takes at least 80 msec × 3 = 240 msec to complete the transmission of the two lighting signals. Here, there is no practical problem that the time lag from when the presence of a person is detected by the wireless transmitter 10 until the lighting fixture is turned on is 300 milliseconds or less, and after the lighting signal is received by the receiver 20. The time lag until the lighting fixture is turned on is about 100 milliseconds. Therefore, in the wireless transmitter 10, the time lag allowed from the detection of the presence of the person by the human sensor 12 to the light emission by the infrared LED 16 is about 200 milliseconds. Therefore, in the wireless transmitter 10, when a regular code is used, it is practically impossible to transmit two lighting signals at random time intervals.

  Therefore, in the wireless transmitter 10, the number of time intervals of the two lighting signals is increased by using a shortened code. Specifically, in the wireless transmitter 10, when the time length of one lighting signal and the extension signal is 8 milliseconds, for example, as shown in FIG. Signals can be transmitted at time intervals of 12 patterns. Therefore, in the wireless transmitter 10, it is only necessary to transmit a signal in an arbitrary combination from a combination of 12 patterns of time intervals, so that the probability of overlapping signals can be greatly reduced.

  As described above, the wireless transmitter 10 transmits a lighting signal and an extension signal that are as short as possible according to the time lag allowed from the detection of the presence of the person by the human sensor 12 to the light emission by the infrared LED 16. By doing so, the probability of overlapping signals can be reduced. This also means that several patterns of wireless transmitters 10 can be installed simultaneously. Therefore, in the wireless transmitter 10, the detection area by the human sensor 12 can be expanded, and the degree of freedom in setting the detection area can be greatly improved.

  As described in detail above, the wireless transmitter 10 according to the embodiment of the present invention generates two lighting signals at random time intervals based on the detection signal supplied from the human sensor 12 by the control unit 14. After transmitting the second lighting signal, an extension signal is generated at random time intervals from the transmission of the first lighting signal based on the detection signal supplied from the human sensor 12 Then make a call.

  Thereby, in the wireless transmitter 10, even when a person is detected simultaneously by the plurality of wireless transmitters 10, it is possible to prevent the lighting signal and the extension signal from interfering with each other in the receiver 20. The instrument can be appropriately controlled.

  In the wireless transmitter 10, the control unit 14 determines the time interval from the transmission of the first lighting signal to the transmission of the extension signal according to the minimum driving time of the lighting fixture that can be set in the wireless transmitter 10. Decide. Thereby, in the wireless transmitter 10, even if the receiver 20 cannot recognize the first extension signal, the second extension signal can be reliably received and recognized.

  Furthermore, in this wireless transmitter 10, the control unit 14 transmits a shortened code having a shorter time length than the regular code lighting signal and the extension signal as the control signal and the extension signal, so that the lighting signal and the extension signal overlap. Even when the first lighting signal overlaps, the time lag until the lighting fixture is turned on by the second lighting signal can be greatly reduced.

  Furthermore, in this wireless transmitter 10, the control unit 14 determines the time length of the lighting signal and the extension signal according to the time lag allowed from the detection of the presence of the person by the human sensor 12 to the transmission of the lighting signal. As a result, the number of patterns in the time interval between the two lighting signals can be increased, so that the probability of overlapping can be reduced.

  In addition, the wireless transmitter 10 does not transmit the lighting signal and the extension signal at random time intervals, but the control unit 14 sends the shortening code whose time length is shorter than the lighting signal and the extension signal of the regular code. Even if only the extension signal is transmitted, it is difficult for the lighting signal and the extension signal to overlap, and even if the first lighting signal is duplicated, the lighting device is turned on by the second lighting signal. The time lag can be greatly reduced.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

It is a floor plan for demonstrating the specific example of an illuminating device provided with the wireless transmitter shown as embodiment of this invention. It is a circuit diagram which shows the structure of the wireless transmitter shown as embodiment of this invention. It is a figure which shows the specific example of the transmission timing of the lighting signal by each of the two wireless transmitters shown as embodiment of this invention, and an extension signal. It is a figure which shows the specific example of the lighting signal and extension signal of a regular code. It is a figure which shows the specific example of the transmission timing of the lighting signal of the normal code | cord | chord by each of two wireless transmitters. It is a figure which shows the specific example of the lighting signal of a shortened code, and an extension signal. It is a figure which shows the specific example of the transmission timing of the lighting signal of the shortened code | cord | chord by each of two wireless transmitters shown as embodiment of this invention. It is a figure which shows the specific example of the transmission timing of the lighting signal of the regular code | cord | chord by each of two wireless transmitters, and demonstrates the time interval from the fall of the 1st lighting signal to the rising of the 2nd lighting signal. It is a figure for doing. It is a figure which shows the specific example of the transmission timing of the lighting signal of the shortening code | cord | chord by each of the two wireless transmitters shown as embodiment of this invention, and demonstrates a mode that the number of patterns of the time interval of two lighting signals was increased. FIG.

Explanation of symbols

10, 10a, 10b Wireless transmitter 11 Power supply 12 Human sensor 13 Brightness sensor 14 Control unit 15 Switch 16 Infrared LED
20 Receiver

Claims (5)

In a hot-wire wireless transmitter that transmits a radio signal to an object to be controlled,
A human sensor that detects the presence or absence of a person by detecting heat rays radiated from a human body existing in the detection area;
Based on the detection signal supplied from the human sensor, two control signals for controlling the control object are generated and transmitted at random time intervals, and the second control signal is transmitted. Later, based on a detection signal supplied from the human sensor, an extension signal for extending the drive time of the control object is generated at random time intervals from the output of the first control signal. A hot wire type wireless transmitter comprising a control unit for transmitting.   The control unit determines a time interval from the transmission of the first control signal to the transmission of the extension signal according to the shortest drive time of the control target that can be set in the hot-wire wireless transmitter. The hot wire wireless transmitter according to claim 1, wherein   2. The hot wire wireless transmitter according to claim 1, wherein the control unit transmits, as the control signal and the extension signal, a shortened code having a shorter time length than the control signal of the normal code and the extension signal. .   The control unit determines a time length of the control signal and the extension signal according to a time lag allowed from detection of the presence of a person by the human sensor to transmission of the control signal. 3. A hot-wire wireless transmitter according to 3. In a hot-wire wireless transmitter that transmits a radio signal to an object to be controlled,
A human sensor that detects the presence or absence of a person by detecting heat rays radiated from a human body existing in the detection area;
Based on the detection signal supplied from the human sensor, a control signal for controlling the control object is generated and transmitted, and after the control signal is transmitted, the detection supplied from the human sensor A control unit that generates and transmits an extension signal for extending the drive time of the control object based on the signal;
The said control part transmits the shortening code | cord | chord whose time length is shorter than the said control signal and the said extension signal of a regular code as the said control signal and the said extension signal. The hot-wire type wireless transmitter characterized by the above-mentioned.

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