JPH0656961B2 - Wireless emergency transmitter - Google Patents

Description

TECHNICAL FIELD The present invention relates to improvements in wireless emergency transmitters.

[Background technology]

This type of wireless emergency transmitter is used by being carried by a sick person, a bedridden elderly person, or the like, and generates an emergency signal by weak radio waves when an emergency situation occurs in the sick person or the elderly person.

In the conventional wireless transmitter, if the emergency switch is operated once, the emergency signal is continuously output until the reset switch is operated again. The signal is not generated. Therefore, in such a conventional type, the transmitter is carried, and the receiver is placed farther away from the transmission area (the range in which the emergency signal output from the transmitter can be detected by the receiver). In addition, when the transmitter is out of battery due to radio wave interference called null point, or when there is something wrong with the transmitter, sufficient consideration is given to transmission trouble. It is usually not.

In order to eliminate such inconvenience, it is conceivable that the controller periodically calls up the transmitter by the bidirectional transmission function so as to confirm the presence or absence of transmission trouble or device abnormality. However, in such a system, the transmitter has a transmitting / receiving function.
Not only is the cost high, but the restrictions on communication characteristics (particularly because the receiving antenna cannot be made large enough to provide sufficient sensitivity) make it unsuitable for portable use.

[Object of the Invention]

The present invention was developed to solve the above problems, and an object of the present invention is to provide a reliable wireless emergency transmitter having a relatively simple structure.

[Disclosure of Invention]

The present invention proposed to achieve the above object includes an intermittent transmission / intermittent end signal generation circuit that selectively outputs an intermittent transmission signal and an intermittent end signal by a setting switch, and an emergency signal generation circuit that outputs an emergency signal. , An emergency reset signal generation circuit for outputting an emergency reset signal, and by operating the setting switch, the intermittent transmission / intermittent end signal generation circuit is activated to output an intermittent transmission signal, while the non-carrying operation causes the intermittent transmission signal to be output. It is characterized in that the transmission / intermittent end signal generating circuit is operated to output the intermittent end signal.

In the preferred embodiment, the operation of the setting switch is switched when the transmitter is attached to or detached from the holder, but the present invention is not limited to such an embodiment, and the user himself operates the setting switch. It may be.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a block diagram of a system using the transmitter of the present invention. A is a transmitter, B is a receiver, and C is a housing information board.

When the emergency switch 1 of the transmitter A is pressed to output an emergency signal from the transmitter A, the receiver B receives the emergency signal and activates the alarm means incorporated in the house information panel C to cause an abnormality. Report the occurrence of a situation.

2a and 2b are views of the transmitter A formed in a portable size as seen from the front and back sides, respectively. The push button type emergency switch is provided on the front side of the main body 2 of the transmitter A. 1
Is provided, an emergency reset switch 4 for resetting the transmitted emergency signal is provided on the back side, and a setting switch 3 for selectively outputting an intermittent transmission signal and an intermittent end signal is provided at the bottom. ing.

2c and 2d show the transmitter A in the holder 5 respectively.
2A and 2B are a perspective view and a front view of a state in which the transmitter A is housed in a holder 5, and when the transmitter A is housed in a holder 5, the setting switch 3 provided on the bottom part is turned on by a convex portion 51 provided on a corresponding part of the holder 5. The switching operation is performed and the intermittent end signal is output. When the transmitter A is removed from the holder 5, the switch 3 is switched again and an intermittent transmission signal is output.

FIG. 3 schematically shows the state in which both of the transmitter A and the receiver B are removed in order to more specifically show the configuration thereof.

The transmitter A is provided with a house code setting switch 6 for setting a house code and a unit selection switch 7 at the base, and the other receiver B is provided with a house code setting switch 8
And output terminals 1 to 4 are provided. In order to enable signal transmission between the transmitter A and the receiver B, the same house code is set by the house code setting switches 6 and 8.
When the unit selection switch 7 of the transmitter A is slid to select the output terminals 1 to 4, the output signal of the transmitter A is output from the corresponding output terminal of the receiver B. In the illustrated example, four transmitters A can be used for one receiver B when the house codes are set to be the same. A1 to a4 of the output terminals 1 to 4 provided in the receiver B are alarm output terminals, b1
˜b4 are emergency signal output terminals, c1˜c4 are common terminals, and these terminals are connected to corresponding connection terminals of the house information board C or the like.

FIG. 4 is a diagram for explaining an example of use of the present invention, in which the transmitter A is accommodated in a holder near the bed when the bedridden elderly person m is sleeping in the bed. No intermittent transmission signal is transmitted from the transmitter A. However, when an elderly person m takes the transmitter A out of the holder and carries the transmitter A away from the bed, the transmitter A outputs an intermittent transmission signal. Since the intermittent transmission signal transmitted at this time is detected by the receiver B side, the receiver B determines that the elderly person m or the like has left the bed.

However, when an elderly person m carrying the transmitter A goes out of the transmission area, the receiver B will cause the transmitter A
Since the intermittent transmission signal that is being transmitted cannot be detected,
It can be seen that the elderly are in dangerous places that cannot be detected even if an emergency occurs in m. The same applies to the case where the user enters the null point or is in the vicinity of a place where strong radio waves are output, even when the user does not go out of the transmission area.

When the old man m returns to the bet and the transmitter A is accommodated in the holder, the transmitter A sends an intermittent end signal, and the receiver B judges from this signal that the transmitter B has returned to the bet.

FIG. 5 is a hardware configuration diagram of the transmitter A. In the figure, 10 is an intermittent transmission / intermittent end signal generation circuit, 11 is an emergency reset signal generation circuit, and 12 is an emergency signal generation circuit. Each of these signal generation circuits 10, 11, 12 has operation switches 3, 4, 1 so that the user can operate the desired switch as needed.

The outputs from these signal generating circuits 10, 11, 12 are output to the timer circuit 13, the one-shot pulse generator 18, and the function switching circuit 14 via the gate circuit section 22.

Here, the timer circuit 13 is operated by a signal sent through the OR gate OR3, and outputs a timing pulse having a preset predetermined time gap. On the other hand, the one-shot pulse generator 18 performs a one-shot operation each time a trigger signal is input via the OR gate OR1, and drives the transmission ON / OFF circuit 19.

In the embodiment, the gate circuit unit 22 includes three OR gates O.
It is composed of R1 to OR3 and one inverter INV, which have a wiring relationship as shown in the figure.

The output of the function switching circuit 14 is sent to the signal code generating circuit 17, and the output signals of the unit code setting device 15 and the house code setting device 16 are input to the signal code generating circuit 17.

The unit code setting device corresponds to the unit code setting switch 7 shown in FIG. 3, and the house code setting device 16 corresponds to the house code setting switch 6.

Further, a transmission ON / OFF circuit 19 is provided after the one-shot pulse generator 18, and the transmission ON / O circuit is provided.
The FF circuit 19 drives the signal code generation circuit 17 and the high frequency oscillation circuit 20, and the antenna 21 outputs a radio wave signal modulated at a predetermined frequency.

The signal transmitted from the transmitter A has the configuration shown in FIG. 6, for example.

In the illustrated example, the code signal is a 6-bit code signal modulated at a predetermined frequency, and such a signal is repeatedly transmitted 2 to 6 times every one-shot operation of the one-shot pulse generator 18.

The first bit S1 of this signal defines the unit code, the second bit S2 to the fifth bit S5 define the house code, and the sixth bit S6 defines the function code.

The function code is assigned a frequency corresponding to a control mode defining signal (in the embodiment, an intermittent transmission signal, an intermittent end signal, an emergency signal, an emergency reset signal) output from the three signal generating circuits 10 to 12. Table 1 shows an example of frequency allocation of the code signal transmitted by the transmitter A.

Next, the operation of the transmitter A of the present invention will be described with reference to FIG.

When the setting switch 3 of the transmitter A is operated to enter the intermittent transmission signal generation mode (in the embodiment shown in FIGS. 2a to 2d, this can be done by removing the transmitter A from the holder 5) Device A emits an intermittent transmission signal.

That is, in the embodiment of FIG. 5, the setting switch 3 is turned on.
Then, the "H" level signal is output from the intermittent transmission / intermittent end signal generation circuit 10 and sent to the timer circuit 13 via the OR gate OR3 to drive the timer circuit 13. As a result, the one shot pulse generator 18
Is driven by a trigger signal output from the timer circuit 13 via the OR gate OR1 at a predetermined time interval,
The transmission ON / OFF drive circuit 19 is intermittently and continuously driven. When the transmission ON / OFF drive circuit 19 is driven, the high frequency oscillation circuit 20 is driven according to the signal code generated by the signal code generation circuit 17, and the radio wave signal modulated by the antenna 21 at a predetermined frequency is intermittent. Is output to.

This radio signal includes an intermittent transmission signal, and the receiver B
Then, it is determined that the transmitter A is carried by decoding this signal.

In this state, when the transmitter A is carried out of the transmission area, the transmitter A continuously outputs the intermittent transmission signal, but the receiver B cannot detect the transmission signal due to radio wave attenuation. .

The judgment time for this is preset to a predetermined time. For example, when a predetermined number of intermittent transmission signals cannot be detected, this judgment is made and an alarm signal is generated on the receiver B side. When the transmitter A enters the transmission area, the receiver B detects the intermittent transmission signal again, so that the alarm is stopped.

When the transmitter A is returned into the holder 5, the switch 3 is switched and the intermittent end signal is output, so that the receiver B judges this state. The above operation is shown in FIG. 7, where A is an intermittent transmission signal and B is an intermittent end signal.

FIG. 8 is a diagram for explaining the operation of the transmitter A in an emergency, and shows the operation when an emergency occurs while the transmitter A is being carried.

When the emergency switch 1 of the transmitter A is operated, the timer circuit 13 is driven by the signal (“H” level) output from the emergency signal generation circuit 12 via the OR gate OR3. A timing signal with a predetermined time gap is output and the one-shot pulse generator 18 is triggered. As a result, the transmission ON / OFF circuit 19 includes the signal code generation circuit 17 and the high frequency transmission circuit 20.
The radio wave signal carrying the emergency signal is intermittently and continuously output from the antenna 21 by driving, so that the emergency signal is emitted on the receiver B side. When a nurse or the like who hears this emergency signal rushes and operates the emergency reset switch 4 of the transmitter A, the emergency reset signal generation circuit 11 outputs a signal of "H" level, so the one-shot pulse generator 18
Trigger. The triggered one-shot pulse generator 18 drives the transmission ON / OFF circuit 19 and drives the high-frequency oscillation circuit 20, but at this time, the function switching circuit 14 specifies the emergency reset as the function code, so the receiver B
The side will detect this and the emergency signal will be stopped. 8C shows an emergency signal, and D shows an emergency reset signal.

In the above embodiments, one setting switch is shared to operate the intermittent transmission / intermittent end signal generating circuit. However, the setting switch is separately provided and the intermittent transmission signal generating circuit and the intermittent end signal generating circuit are provided. And may be separately provided.

〔The invention's effect〕

According to the wireless emergency transmitter of the present invention, in addition to the emergency signal and the emergency reset signal, the intermittent transmission signal and the intermittent end signal can be generated by the switch operation. In particular, the intermittent transmission signal is output when carrying and intermittent when not carrying. Since the end signal can be output, a highly reliable emergency system can be realized with a relatively simple structure.

[Brief description of drawings]

FIG. 1 is an example of an emergency system using the transmitter of the present invention, FIGS. 2a to 2d are explanatory views showing the outside of the transmitter,
FIG. 3 is an explanatory view showing a state in which the covers of the transmitter and the receiver are removed, FIG. 4 is an explanatory view of a usage example of the present invention, FIG. 5 is a hardware configuration example of the transmitter, and FIG. 7 and 8 are time charts for explaining the operation of the transmitter. (Explanation of symbols) A ... Sender B ... Receiver 1 ... Emergency switch 3 ... Setting switch 4 ... Emergency reset switch 10 ... Intermittent transmission / intermittent end signal generation circuit 11 ... Emergency reset signal generation circuit 12 ... Emergency signal generation circuit

Claims (1)

[Claims] 1. An intermittent transmission / intermittent end signal generation circuit for selectively outputting an intermittent transmission signal and an intermittent end signal by a setting switch, an emergency signal generation circuit for outputting an emergency signal, and an emergency for outputting an emergency reset signal. A reset signal generating circuit is provided to operate the intermittent transmission / intermittent end signal generating circuit to output an intermittent transmission signal when carrying by operating the setting switch, while the intermittent transmitting / intermittent end signal generating circuit is operated when not carrying. A wireless emergency transmitter, which is configured to operate and output an intermittent termination signal.