JP2000353595A - Wireless human body detecting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect an existence of a human in a set area regardless of the motion of the human. SOLUTION: A transmitting device 1 is held by individual persons, and a position signal is transmitted from the transmitting device 1 through radio wave as a medium. A human body detecting terminal 33 determines whether the transmitting device 1 transmitting the position signal exists in a prescribed area or not, and instructs to turn on a lighting load L if the transmitting device 1 exists. The instruction from the human body detecting terminal 33 is transmitted to a relay terminal 32 by a transmission signal transmitted on a signal line Ls. The relay terminal 32 turns on the lighting load L.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to transmitting a position signal using a radio wave as a medium from a transmitting device configured to be carried by a person, and defining a load when the position of the person is confirmed by the position signal. The present invention relates to a wireless human body detection system that is controlled to a state of (1).

[0002]

2. Description of the Related Art In general, many human body detection systems which detect the presence or absence of a person and control the load are configured to detect the presence or absence of a person by infrared rays radiated from the human body. In this type of human body detection system, a pyroelectric infrared sensor is widely used as a sensor for detecting infrared radiation emitted from a person.

[0003]

Incidentally, since the pyroelectric infrared sensor is a differential sensor which generates an output in accordance with a change in the amount of infrared light received, an output cannot be obtained unless a person moves. Therefore, in the present situation, this kind of human body detection system is provided with a timer so as to hold the output for a certain period of time after the detection of a person is stopped.

[0004] It is assumed that a human body detection system of this type is used to light a lighting load during a period in which a person is present in a preset area. In this type of application,
The lighting load must be kept on while the person is present in the set area. Therefore, even if the movement of the person becomes small and the output from the pyroelectric infrared sensor stops generating, the lighting state of the illumination load is held for a certain time by the timer. This timer is reset when an output is again generated from the pyroelectric infrared sensor within the time during which the lighting state is maintained, and the lighting state of the lighting load is continued. Therefore, by appropriately setting the time for maintaining the lighting state, it is possible to maintain the lighting state of the lighting load even when the movement of a person existing in the set area is reduced, and furthermore, to set the lighting area in the set area. Unnecessary power consumption due to the lighting load continuing to be turned on more than necessary after the person no longer exists is relatively reduced.

[0005] However, since the movement of the body is slow in the elderly and the like, it is not possible to cope with it unless the time held by the timer is increased, and wasteful power consumption increases if the time held by the timer is increased. Problems arise. That is, it is difficult for the conventional human body detection system using the pyroelectric infrared sensor to perform an operation suitable for an elderly person whose body movement is slow.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object the object of the present invention is to provide a method in which a person is present in a set area, even if the body moves slowly or stops.
An object of the present invention is to provide a wireless human body detection system that can control a load to a specified operation state and can immediately change the operation state of a load when a person no longer exists in a set area. .

[0007]

According to a first aspect of the present invention, there is provided a transmitting device for transmitting a position signal used for detecting the location of a person using a radio wave as a medium, and receiving the position signal to determine the location of the person. The system includes a position detection device for detecting, and a control device for controlling the load to a specified operation state when the position of the carrier detected by the position detection device is within a preset region.

According to a second aspect of the present invention, in the first aspect of the present invention, a transmission signal is transmitted and received between a plurality of terminals each having an address and the transmission control device by a time division multiplex transmission method, and the transmission control device is transmitted to the transmission control device. By using the correspondence of the set addresses, data is transmitted and received between the terminals, and the position detection device is provided in any one of the terminals, and the period during which the wearer is present in a preset area is set as the above. Notify by a transmission signal, the control device is provided in another terminal device, and the load is controlled to a specified operation state during a period in which the wearer is present in a preset region, and the transmission control device includes: Address correspondence is set such that a terminal provided with a position detecting device and a terminal provided with the control device correspond to each other.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the control device is configured such that the load is a lighting load and the control device is connected to the control unit during a period in which the wearer is within a preset area. The lighting load is turned on.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In this embodiment, as shown in FIG. 1, a two-wire signal line Ls connected to a transmission control device 30 is used.
An operation terminal 31 having a switch SW, a relay terminal 32 having a built-in relay inserted into a power path from a commercial power supply to a lighting load L as a load, and a position from the transmitting device 1 carried by a person. A human body detection terminal 33 for receiving a signal and detecting the presence or absence of a person in the set area is connected as a terminal. Here, the operation terminal device 31, the relay terminal device 32, and the human body detection terminal device 33 are multi-drop connected to the signal line Ls. Individual addresses are set for the operation terminal 31, the relay terminal 32, and the human body detection terminal 33, respectively, and the transmission control device 30 uses these addresses to operate the operation terminal 31, the relay terminal 32, and the human body detection terminal. 33 are individually recognized.

Next, the operation of the system shown in FIG. 1 will be briefly described. Since the signal transmission of the human body detection terminal 33 can be treated equivalently to the operation terminal 31, the operation will be described below in relation to the operation terminal 31 and the relay terminal 32. Differences of the human body detection terminal 33 from the operation terminal 31 will be described later.

The transmission control device 30 controls the signal line Ls
The transmission signal Vs of the format shown in FIG. That is, the synchronization signal SY indicating the start of signal transmission, the mode data MD indicating the mode of the transmission signal Vs, the address data AD for individually calling the operation terminal 31 and the relay terminal 32, the operation terminal 31 and the relay terminal 32 , Control data CD for giving an instruction, checksum data CS for detecting a transmission error, and a signal return period WT which is a time slot for receiving a return signal (monitoring data) from the operation terminal 31 or the relay terminal 32. Bipolar (± 2
4V), and data is transmitted by pulse width modulation (FIG. 2B).
In each operation terminal device 31 and each relay terminal device 32, the signal line L
When the address data AD transmitted by the transmission signal Vs received through the control signal s matches a preset address, the control data CD is fetched from the transmission signal Vs, and when there is monitoring data to be transmitted, the transmission signal Vs
During the signal return period WT, the monitoring data is returned as a current mode signal (a signal transmitted by short-circuiting the signal line Ls via an appropriate low impedance).

A desired operation terminal 3 is transmitted from the transmission control device 30.
1 or the relay terminal 32, the mode data MD is set to the control mode and the operation terminal 3
1 or the transmission signal Vs having the address of the relay terminal 32 as the address data AD.
Is transmitted to the signal line Ls, the operation terminal device 31 or the relay terminal device 32 that matches the address data AD receives the control data CD and returns the monitoring data during the signal return period WT. The transmission control device 30 transmits the control data C
It is confirmed from the relationship between D and the monitoring data received during the signal return period WT that the control data CD has been transmitted to the desired operation terminal 31 or relay terminal 32. The relay terminal 32 instructs the operation of the load control relay or the change of the dimming signal according to the received control data CD,
The operation terminal 31 outputs a monitoring signal for confirming the operation according to the received control data CD.

On the other hand, the transmission control device 30 normally transmits the transmission signal Vs in which the mode data MD is in the dummy mode at regular time intervals (constant polling). When notifying the occurrence of a monitoring input due to the operation of the SW, an interrupt signal as shown in FIG. 2C is generated in synchronization with the synchronization signal SY of the transmission signal Vs in the dummy mode. At this time,
The operation terminal 31 sets the interrupt flag and sets the transmission control device 3
Be prepared for the subsequent information exchange with 0. When the transmission control device 30 receives the interrupt signal, the mode data MD is set to the interrupt polling mode and the upper half of the bits of the address data AD (the upper 4 bits when the address data AD is 8 bits).
The transmission terminal transmits the transmission signal while sequentially increasing the number of bits, and generates an interrupt signal. In the operation terminal device 31, the upper four bits of the address data AD of the transmission signal in the interrupt polling mode are set in the operation terminal device 31. When the upper 4 bits of the address match, the lower half bits of the address are returned to the transmission control device 30 during the signal return period WT. As described above, since the transmission control device 30 collectively searches for 16 operation terminals 31 that have generated the interrupt signal, the operation terminal 31 can be found in a relatively short time.

When the transmission control device 30 acquires the address of the operation terminal device 31 that has generated the interrupt signal, the mode data M
D is set to the monitoring mode, and a transmission signal having the acquired address data AD is transmitted to the signal line Ls. In response to this transmission signal, the operation terminal device 31 returns information to be transmitted to the signal return period WT. . Finally, the transmission control device 30 sends a signal instructing an interrupt reset to the operation terminal device 31 that has generated the interrupt signal, and releases the interrupt flag of the operation terminal device 31. As described above, the operation terminal 3
The information transmission from the transmission control device 1 to the transmission control device 30 is completed by four signal transmissions from the transmission control device 30 to the operation terminal 31 (dummy mode, interrupt polling mode, monitoring mode, interrupt reset). When the transmission control device 30 attempts to know the desired operation state of the relay terminal 32, it is only necessary to transmit a transmission signal using the mode data MD as monitoring data.

In short, when input data is generated by operating the switch SW, the operation terminal device 31 returns monitoring data corresponding to the input data to the transmission control device 30, and the transmission control device 30 responds to the monitoring data by the relay terminal 30. Vessel 3
2, when the control data CD is transmitted, the relay terminal 32 controls the lighting load L by opening and closing the contact of the load control relay.

When the above-described remote monitoring and control system is used, the correspondence between the addresses of the operation terminal 31 and the relay terminal 32 is simply set in the transmission control device 30 in the form of a table. The combination can be changed, and the address of a plurality of lighting loads L can be associated with the address of one switch SW. Therefore, the switches SW and the lighting loads L can be freely associated with each other according to the purpose of use. As a result, the convenience of controlling the lighting load L is increased.

Incidentally, the human body detecting terminal 33 used in the present embodiment is configured as shown in FIG.
The human body detection terminal 33 is used together with the transmitting device 1 that transmits a position signal for detecting the position of the carrier by radio waves, so that the person carrying the transmitting device 1 exists in the preset area. It is configured to be able to detect whether or not it is. This type of transmitting device 1
Transmits a position signal including an identification code for individually identifying a carrier using radio waves as a medium. For example, the transmitting device 1 used to know the location of each individual in a nursing home or the like can be used. it can. By diverting the transmitting device 1 used for other purposes in this way, the waste of carrying the transmitting device 1 only for controlling the lighting load L is eliminated.

Next, the configuration of the human body detecting terminal 33 will be described. As shown in FIG. 3, the human body detection terminal 33 includes a signal processing unit 10 mainly including a microcomputer, and the signal processing unit 10 is connected to a signal line Ls via a transmission / reception circuit 11. The power supply circuit 12 is connected to the signal line Ls. The power supply circuit 12 rectifies and smoothes and stabilizes a transmission signal transmitted through the signal line Ls, thereby generating an internal power supply of the human body detection terminal 33. Human body detection terminal 3
Reference numeral 3 denotes an address for exchanging data with the transmission control device 30 by a transmission signal in the same manner as the operation terminal device 31. This address is set in an address storage memory 13 composed of an EEPROM.

The address written in the address storage memory 13 is set by transmitting and receiving an optical wireless signal using infrared rays as a medium to and from the separately provided address setter 2. That is, the address setting unit 2 sets an address to be set in the human body detection terminal 33 and transmits the address to the human body detection terminal 33 by an optical wireless signal. The wireless signal is received by the wireless signal transmission / reception circuit 14 and is written in the address storage memory 13, so that the transmission signal is transmitted and received with the transmission control device 30 using the address. The address setting device 2 has a function of checking addresses stored in the address storage memory 13 and correcting addresses, in addition to writing addresses. Therefore, in response to a request for confirmation or correction from the address setting device 2, the human body detection terminal device 33 also transmits an optical wireless signal.

As described above, the transmitting device 1 carried by a person transmits a position signal by radio waves, and the human body detection terminal 33 has the receiving circuit 15 for receiving the position signal from the transmitting device 1. Is provided. The receiving circuit 15 receives and detects the position signal, and extracts a signal component other than the carrier wave. The output of the receiving circuit 15 is input to a position signal processing unit 16 mainly composed of a microcomputer, and it is determined whether or not the transmitting device 1 exists in a preset area.
The simplest configuration for determining whether or not the transmitting device 1 is within the area is a configuration for determining the magnitude of the reception intensity. Can be almost determined. It is also possible to adopt a configuration in which the transmitting device 1 obtains its own position and transmits the position as a position signal to the human body detection terminal 33 in order to set the area with high accuracy. That is, a plurality of signal sources for transmitting signals different from each other are provided separately from the transmitting device 1, and the relative position of the transmitting device 1 with respect to the signal source is determined based on a state in which signals from each signal source are received by the transmitting device 1. Is possible. The position of the transmitting device 1 may be specified by using this kind of technology. The position signal may include identification information for identifying the carrier, and the position signal processing unit 16 may also determine the identification information. That is, it may be determined whether or not a specific individual exists in the set area.

When the presence of a person in the set area is detected by the position signal processing unit 16 as described above, the position signal processing unit 16 connects the signal processing unit 10 to the relay terminal 32. An instruction is given to turn on the lighting load L that has been set. That is, the position signal processing unit 16 functions in the same manner as the switch SW in the operation terminal device 31,
When a monitoring input for instructing the lighting of the illumination load L is given from the position signal processing unit 16 to the signal processing unit 10, an interrupt signal is generated to notify the transmission control device 30 of the presence of a person. Thereafter, during a period in which the transmission circuit 1 is determined to be present in the set area, the position signal processing unit 16 does not send a signal to the signal processing unit 10 and the lighting state of the lighting load L is maintained. . On the other hand, when the transmitting device 1 is no longer present in the set area, the position signal processing unit 16 provides a monitoring input for instructing the signal processing unit 10 to turn off the lighting load L. That is, the signal processing unit 10 operates equivalently to the case where the switch SW provided on the operation terminal 31 is turned off, and turns off the illumination load L through the relay terminal 32.

As is clear from the above description, the receiving circuit 15 and the position signal processing section 16 constitute a position detecting device. Further, the relay terminal device 32 functions as a control device. The operation of the human body detection terminal 33 is equivalent to the operation of the operation terminal 31 except that the process according to the position of the transmitting device 1 is performed.
, The lighting load L can be controlled collectively,
A plurality of lighting loads L can be controlled to various lighting states with simple wiring, and high convenience can be obtained.

In the above-described embodiment, the information on the detection of the presence of a person is transmitted to the load side using a transmission signal based on the time division multiplex transmission method, but the transmission signal based on the time division multiplex transmission method is not used. And a position detecting device and a control device.
It is also possible to provide a switch element that is provided on one body and that is turned on and off according to the presence or absence of a person, and that the load is controlled by the switch element. Further, the load may control not only the lighting load but also other loads such as a ventilation fan. Further, depending on the type of load, various control modes such as controlling to turn off after a certain time after the presence of a person is no longer detected can be adopted.

[0025]

According to the first aspect of the present invention, there is provided a transmitting device for transmitting a position signal used for detecting the location of a person using a radio wave as a medium, and a position detecting device for receiving the position signal and detecting the position of the person. And a control device for controlling the load to a specified operation state when the position of the carrier detected by the position detection device is within a preset region, and transmits a position signal using a radio wave as a medium. Since the operation state of the load is controlled according to the position of the transmitting device, the load can be controlled regardless of the degree of movement of the person carrying the transmitting device. Therefore, even a user who moves slowly, such as an elderly person, can control the load according to the presence or absence of a person.

According to a second aspect of the present invention, in the first aspect of the present invention, a transmission signal is transmitted and received between a plurality of terminals each having an address and the transmission control device by a time division multiplex transmission system, and the transmission control device is transmitted to the transmission control device. By using the correspondence of the set addresses, data is transmitted and received between the terminals, and a position detection device is provided in any one of the terminals to transmit a transmission signal during a period in which the carrier is present in a preset region. The control device is provided in another terminal device, and the load is controlled to a specified operation state during a period in which the wearer is within a preset region, and the transmission control device is provided with a position detecting device. Address correspondence is set so that the terminal device and the terminal device provided with the control device correspond to each other, and information that a person has been detected using time division multiplex transmission technology is transmitted. Of transmitting to the terminal device to be able to control the load, it is possible to easily set by the relationship correspondence between the addresses of the position detecting device provided with the terminal device and a control device is provided with terminal unit.

According to a third aspect of the present invention, in the first or second aspect, the load is a lighting load, and the control device reduces the lighting load during a period in which the wearer is within a preset area. The lighting load can be turned on and off according to the presence or absence of a person in the set area.If the lighting load is turned on only during the period when a person is present, wasteful power consumption is reduced. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram showing a format of a transmission signal used in the embodiment.

FIG. 3 is a block diagram showing a human body detection terminal used in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmission device 15 Receiving circuit 16 Position signal processing part 30 Transmission control device 31 Operation terminal device 32 Control terminal device 33 Human body detection terminal L Lighting load Ls Signal line

Claims (3)

[Claims] 1. A transmitting device for transmitting a position signal used for detecting the location of a person using radio waves as a medium, a position detecting device for receiving the position signal and detecting the position of the person, and a position detecting device. And a control device for controlling the load to a specified operation state when the detected position of the carrier is within a preset area. 2. A method of transmitting and receiving a transmission signal between a plurality of terminals each having an address and a transmission control device by a time division multiplex transmission system and using an address correspondence set in the transmission control device. So as to exchange data between devices, the position detection device is provided in any one of the terminals, and the period in which the carrier is present in an area set in advance is notified by the transmission signal, and the other terminals are transmitted to the other terminals. A control device is provided to control the load to a specified operation state during a period in which the wearer is within a preset region, and the transmission control device includes a terminal provided with the position detection device and the control device. 2. The wireless human body detection system according to claim 1, wherein the correspondence of the addresses is set so as to correspond to the terminal provided with. 3. The lighting device according to claim 1, wherein the load is a lighting load, and the controller turns on the lighting load during a period in which the wearer is within a preset area. 2. The wireless human body detection system according to 2.