DE2918531A1 - Electronic alarm wrist watch - has change over switch between timing circuit and receiver driven by aerial - Google Patents

Abstract

The tripping circuit of the alarm in the electronic wrist watch is used for supervisory or signalling duties. The trip circuit is connected to a receiver featuring an aerial (5) as well as to the timing circuit of the watch. The switching between the receiver and timer is controlled by a change-over unit. The transmitter provides a modulated or coded signal processed by the decoder or demodulator of the receiver for driving the discriminator. This ensures the detection of present or absent modulated or coded data for driving the signalling circuit. Elimination of faulty operation of the tripping circuit is due to a counter, series-connected to the discriminator.

Description

Electronic clock, especially wristwatch, with alarm

device The invention relates to a watch to be worn on the body, E.g. a wristwatch with a timer and an electronic trigger circuit for a Signaling device.

In the case of the electronic clocks mentioned at the outset, it is known in Watch case to install an alarm device at the same time. If using an input keyboard If a specific alarm time has been entered, the current time will be constant compared with the entered alarm value.

If both values match, this trigger circuit controls the alarm device arranged in the same watch case. With the known electronic Clocks, the time criterion (alarm time) is used to trigger an alarm. Such an alarm triggering is, however, not suitable for further criteria.

The purpose of the present invention is to use the known trigger circuit with alarm device for more extensive purposes, i.e. in particular monitoring and reporting tasks to use.

To solve the problem, the invention is characterized in that that there is a receiver with a receiving antenna, the output of which is connected to the trigger circuit connected is.

An essential feature of the present invention is that now according to the invention, the electronic trigger circuit for the signaling device does not only triggered by the previously known alarm circuit in the clock is, but that according to the invention in the watch case at the same time with a receiver Receiving antenna is installed, the output of which is connected to the trigger circuit is. The field of application of the clock according to the invention is therefore significantly expanded, because the electronic trigger circuit that is present in the watch in a known manner is used with signaling device according to the invention for other functions.

In a preferred embodiment of the present invention is There is a changeover switch that connects the trigger circuit to the output of the Receiver or with the time mechanism of the clock, so that one depending on the position switch the receiver or the timer to the trigger circuit can.

The field of application of the clock according to the invention is now opposite the known clock circuits significantly expanded because the integrated in the clock case Receiver with receiving antenna for a wide variety of surveillance and reporting tasks Kind is usable.

In a first embodiment, the receiver is arranged in the watch the transmitter assigned to a reporting device for theft protection. The reporting device is in this case by the transmitter and the receiver that is wirelessly coupled to it Signal device formed, the receiver according to the invention with in the clock is housed and the transmitter is in an object to be monitored, e.g. a Purse. With increasing distance between transmitter and receiver or decreasing Reception amplitude when falling below a predetermined by a discriminator The signal device responds to the threshold value.

The essence of this embodiment is the use of the Decrease or cessation of the field strength of a communication link between the Transmitter and receiver for monitoring purposes.

Is the communication link between the sender and the recipient interrupted, the watch and receiver worn by the caregiver trigger the alarm off, so that the caregiver is reminded that the equipped with the transmitter Reference item no longer in its immediate vicinity is located. This has the essential advantage that the reference person can move freely within a preselectable distance, as the connection between Reference person and reference object wirelessly the reference object from the environment away from the caregiver, this leads to a decrease in the reception field strength in the receiver, whose discriminator falls below the receiving amplitude when it falls below a predetermined value controls the signal device. A beneficial improvement the invention consists in that in order to avoid incorrect actuation of the trigger circuit a counting circuit is connected downstream of the discriminator, which only after several times Presence or absence of the modulated or encoded message controls the signaling device.

In a second embodiment, the transmitter and the receiver Part of a wireless paging system. In large buildings, e.g. hospitals, In industrial companies and the like, it is often necessary for certain people to work in constant connection and on-call duty with a central office. Previously had to these people carry a receiving device about the size of a cigarette pack with them Carry around and then when an alarm is triggered in the receiving device with the control center To connect.

According to the invention, such a receiver is now in the watch case conventional wristwatch integrated, so that it takes up much less space and results in a much more convenient use.

In a third embodiment it is provided that the transmitter and the receiver are part of a Eurosignal transmission system. Such a one Plant is known and is therefore not to be described in more detail in the present invention will. Previously, the caregiver had to have a recipient the size of a cigarette pack be equipped and carry this receiver around with them all the time. According to the invention it is now proposed that the receiver assigned to the Euro signal system in the Watch case is integrated. This results in a much smaller space requirement. Furthermore, there are reduced costs because the previously known watch cases Existing alarm device is used twice, namely once as a wake-up alarm and on the other hand as an alarm device within the scope of the present invention.

The two functions are switched over using the ones mentioned at the beginning Toggle switch.

The communication link in the sender and receiver can be either It is particularly preferred if the communication link is through either Ultrasonic waves or formed by high frequency waves.

The scope of the present invention does not extend only on the subject matter of the individual claims, but also on the combination the claims with each other.

The invention will now be illustrated by means of only one embodiment Embodiment described in more detail. Here go from the drawing and its Description of further advantages and features of the invention that are essential to the invention.

There are shown: FIG. 1 a schematically drawn block diagram of a wrist watch with receiver and trigger circuit to be worn on the body; Fig. 2 block diagram the integration of the receiver in a watch case.

The in Fiq. 1 schematically shown transmitting and receiving device consists of a transmitter I and a receiver II. The transmitter I consists of one Message source 1 that controls a modulator 2. The modulator 2 controls the transmission stage 3 with its low-frequency signal, which this LF signal into a higher frequency signal for transmission via the antenna 4. Between the antenna 4 of the transmitter and the antenna 5 of the receiver II consists of the above-described, wireless communication link III.

The receiver II generally consists of the antenna 5 with the coupled Reception level 6 and a connected demodulator 7. The reception level 6 consists in a known manner of a frequency-selective resonant circuit, which is based on the carrier frequency of the transmitter I is tuned. In the modulator 7 is the modulated Receiver signal demodulated; the output of the demodulator 7 controls a discriminator 8 with an integrated playback converter. The discriminator 8 compares the reception amplitude with a predetermined nominal value. Falls below the reception amplitude this setpoint, the output signal of the discriminator 8 changes (e.g. digital from 0 to 1). This digital output signal is fed to a signal device 14, which triggers an acoustic and / or a visual alarm, provided the reception amplitude falls below the setpoint specified in the discriminator 8.

The embodiment described above relates to that Transmitter and receiver part of a reporting device for theft protection are.

The transmitter I is preferably in an object to be monitored (Reference item), e.g. housed in a handbag and the recipient II is located in the watch with the caregiver. Between the transmitter I and the receiver II the wireless communication connection exists III. The range or the target value of the discriminator is preferably set so that the receiver II no Triggers an alarm when the caregiver is in contact with the object to be monitored a room. However, if the caregiver leaves this room, i.e. at a distance if it is removed from the transmitter or if the reference object is removed by a thief, it takes the incoming in the antenna 5 of the receiver II received amplitude, so that the the target value given by the discriminator is fallen below and the signaling device 9 triggers an acoustic and / or visual alarm.

However, the present invention is not limited to this one embodiment limited. Rather, it is possible to use the block diagram shown in FIG. 1 as well to use for a paging system. In this case, the input keyboard 11 Enter the code of the person to be called on the transmitter side. The code will modulated in a known manner onto the transmission signal of the message source 1 (modulator 2). This modulation method can be amplitude modulation as also be a frequency modulation. It is also possible instead of the specified Modulation methods also use digital modulation methods, such as pulse code modulation or pulse duration modulation or pulse frequency modulation The coding described is also advantageously used in the reporting device for monitoring and theft protection applied so that several systems on the same frequency are free of interference at the same time can be operated.

The modulated or encoded signal is then transmitted via the transmission stage 3 given to the transmitting antenna 4 and via the wireless communication link III transmitted to the receiving antenna 5 of the receiver II. In reception level 6 of the Receiver II, the signal is processed and in the demodulator connected to it 7 demodulated or decoded. The output level of the demodulator 7 changes, if the demodulator 7 the person-specific code, which is via the input keyboard 11 was entered on the sending side. The output level then goes, for example from a logical 0 to a logical 1 and controls the downstream accordingly Discriminator on. A changeover switch 9 is arranged at the input of the trigger circuit 15, with which it is possible to either set an alarm signal from the timer 13 in the clock to give the trigger circuit 15 and the signaling device 14 or - in switched Position - the alarm signal of the discriminator 8 on the trigger circuit 15 and the signaling device 14 to give. When recognizing the person-specific Codes on the receiver side are then finally alarmed in the signaling device 14 triggered.

The same description as above also applies to the application at a Euro signal system after the Euro signal system is practical on the receiver side does not differ from the block diagram of a paging system described above.

The input keyboard 12 on the receiver side is used in the first exemplary embodiment for setting the alarm time in timer 13 (arrow above).

For the second embodiment (use as a paging or Euro signal system), the input keyboard 12 on the receiver side is used to set the person-specific Set the code on the discriminator 8 so that an alarm is only triggered if a correspondingly coded or modulated signal via the communication link III is transmitted.

Fig. 2 shows the integration of the receiver II in a watch case 10. The antenna 5 of the receiver II and is on the watch case or on the watch strap the switch 9 attached.

In the watch case is still the well-known alarm device, as it is at the time alarm trigger is known, housed.

It is preferred if the transmitter I works in pulse mode and the Receiver II only shows the amplitudes of the transmitted pulses received in the discriminator 8 compares with the specified target value (threshold value). With this measure will Significant transmission power saved, so that the service life of the power supply elements elevated.

Another embodiment of the present invention provides a wireless one Coupling between the transmitter I and the receiver II via ultrasonic waves. This transmission method becomes more important when it comes to the reference person to allow to turn away from the monitored object and freely in the room to move, but not to leave the room.

It is preferred if transmitter I and receiver II each have a test button in order to test the function of these devices and, above all, to test their performance of the batteries.

Of course, the watch case does not necessarily need to be on the arm to be worn by the caregiver. It is within the scope of the present invention if the watch case according to the invention is also used in a be3uamltell pocket calculator is housed. It is known to use electronic calculators at the same time To accommodate clocks with alarm triggering. According to the invention, the recipient IT is in housed such a pocket calculator, which is then attached to the body with the caregiver will be carried.

The circuit of the transmitter (I) and receiver (11) for the production a communication link III is part of the state of the art, as are the methods for coding and decoding a transmission signal. The production is claimed a wireless communication link for the surveillance and monitoring described above Reputation purposes, as well as the integration of the receiver II in the watch case 1o under multiple Utilization of the components already available there.

Claims (12)

Claims X Watch to be worn on the body, e.g. wristwatch with Timer and with an electronic trigger circuit for a signaling device, d u r c h e k e n n -z e i c h n e t that a receiver (II) with receiving antenna (5) is present, the output of which is connected to the trigger circuit (15). 2. Clock according to claim 1, d a d u r c h g e k e n n -z e i c h n e t that the trigger circuit (15) to both the output of the receiver (II) as is also connected to the timer (13) of the wristwatch (10). 3. Clock according to claims 1 and 2, d a d u r c h g e k e n n z e i c h n e t that there is a changeover switch (9) that controls the trigger circuit (15) optionally with the output of the receiver (15) or with the timer (13) connects. 4. Clock according to claim 1, d a d u r c h g e k e n n -z e i c h n e t that in the case of the wristwatch (10) the timer (13), the trigger circuit (15) with signaling device (14) and the receiver (II) is arranged. 5. Clock according to claims 1 and 4, d a d u r c h g e k e n n z e i c h n e t that the receiving antenna (5) is arranged in the bracelet of the wristwatch (10) is. 6. Clock according to one or more of the preceding claims, d a D e c h e k e n n e n n e ct i n t that a transmitter (I) is available, which is in the Pulse mode works, and the receiver (II) is clocked by the transmission pulse. 7. Clock according to claim 1 and 6, d a d u r c h g e k e n n z e i c h n e t that the transmitter (I) sends out a modulated or coded signal and in the receiver (II) a demodulator (7) or a decoder of the receiving stage (6) it is connected downstream that a discriminator at the output of the demodulator (7) or decoder (8th) is present, the presence or absence the modulated or encoded message is detected and the signaling device (14) drives. 8. Clock according to one of the preceding claims 1-7, d a d u r c h It is noted that to avoid incorrect actuation of the trigger circuit (15) a counting circuit is connected downstream of the discriminator (8), which only after repeated presence or absence of the modulated or encoded Message controls the signaling device (14). 9. Clock according to one of the preceding claims, d a d u r c h g e it is not indicated that the transmitter (I) and receiver (II) are part of a wireless paging system. lo. Clock according to one of the preceding claims 1-8, d a d u r c h it is noted that the transmitter (I) is a euro signal transmitter and that the receiver (II) is a euro signal receiver. 11. Clock according to one of the preceding claims 1-8, d a d u r c h it is noted that the recipient (II) is part of a reporting device is designed in such a way that in an object to be monitored, e.g. a handbag, the transmitter (I) is accommodated, and the discriminator (8) in the absence of any or when falling below a threshold specified by the discriminator (8) with increasing distance between transmitter (I) and receiver (II) or decreasing Receiving amplitude controls the signal device. 12. Clock according to one of the preceding claims 1-8, d a d u r c h it is noted that the communication link (III) between the transmitter (I) and receiver (II) is formed by ultrasonic waves.