JP3008460U - Portable emergency transmitter - Google Patents

Abstract

(57) [Summary] [Purpose] A portable emergency signal that does not emit an emergency signal even when lying down, emits an emergency signal even when it does not move in its normal state, and does not emit an emergency signal in normal operation. Provide a transmitter. A piezoelectric vibration sensor 11, an amplifier 12 that amplifies an output voltage of the piezoelectric vibration sensor 11, comparators 13 and 14 that are connected to an output side of the amplifier 12 and detect a vibration signal included therein, and comparators 13 and 14, respectively. A short-time timer 15 that uses the output as a reset signal, a buzzer 16 that is driven by the output of the short-time timer 15, a transmitter 17 that transmits a weak radio wave that is an emergency signal by the output of the short-time timer 15, and an electric power to these. And a power supply unit 18 for supplying the power.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a portable emergency transmitter that is carried by a person and emits radio waves in an emergency.

[0002]

[Prior art]

 Conventionally, a portable emergency transmitter that transmits radio waves using a tilt sensor such as a mercury relay as a start signal has been proposed, but this is used when a person carrying the portable emergency transmitter falls. The built-in tilt sensor outputs an output, the transmitter transmits an emergency radio wave in response to this signal, the receiver located at a remote location receives the signal, and contacts another person.

[0003]

[Problems to be solved by the device]

 However, in the portable emergency transmitter according to the conventional example, since the tilt sensor is used, there is a drawback that an emergency signal is emitted when working while lying down. . Noise output means for removing noise contained in the output side of the tilt sensor is provided, but since it operates quickly, it also has the drawback of emitting emergency radio waves even when it is a little lying down. It was The present invention has been made in view of the above circumstances.It does not emit an emergency signal even when lying down, emits an emergency radio wave even when it does not move as it is, and even in normal operation, it emits an emergency radio wave. Aims to provide a portable emergency transmitter that does not transmit.

[0004]

[Means for Solving the Problems]

 The portable emergency transmitter according to claim 1, which is in line with the above object, includes a piezoelectric vibration sensor, an amplifier that amplifies an output voltage of the piezoelectric vibration sensor, and is connected to an output side of the amplifier to detect a vibration signal included therein. A comparator, a short time timer that uses the output of the comparator as a reset signal, a buzzer that is driven by the output of the short time timer, and a transmitter that transmits weak radio waves that become an emergency signal by the output of the short time timer. And a power supply unit for supplying power to these. The portable emergency transmitter according to claim 2 is the portable emergency transmitter according to claim 1, wherein the piezoelectric vibration sensor includes a piezoelectric vibration gyro sensor, and the comparator includes two comparators having different reference voltages. Then, the output of the piezoelectric vibration gyro sensor is separately output by the two comparators into a right rotation output and a left rotation output, and the display lamps are turned on independently. A portable emergency transmitter according to a third aspect is the portable emergency transmitter according to the second aspect, further comprising an emergency transmission switch by a manual input for operating the transmitting unit. In the above, in addition to the case where the buzzer and transmitter are activated simultaneously by the output of the short-time timer, the buzzer is activated first by the output of the short-time timer, and a certain time (for example, 2 to 5 seconds) is opened before transmission. It also includes the case where the unit operates.

[0005]

[Action]

 In the portable emergency transmitter according to any one of claims 1 to 3, a piezoelectric vibration sensor is used, the output of the piezoelectric vibration sensor is amplified by an amplifier, and then the piezoelectric vibration output included in the comparator is detected. The short time timer is always reset. Therefore, if the piezoelectric vibration sensor outputs in a time shorter than the time set by the short-time timer, it will be reset before the short-time timer counts up, and no output will be generated. However, if, for example, the person carrying the portable emergency transmitter falls down and the portable emergency transmitter is in a stationary state, the piezoelectric vibration sensor output is lost and the short-time timer is reset. The output is generated from the short-timer in the non-use state. This activates the buzzer and sends an emergency signal consisting of weak radio waves from the transmitter. Particularly, in the portable emergency transmitter according to the second aspect, the piezoelectric vibration sensor is composed of the piezoelectric vibration gyro sensor, and the right rotation output and the left rotation output are separately generated. Normal operation can be confirmed by the indicator lamp. Further, in the portable emergency transmitter according to claim 3, since the emergency transmission switch is further provided, by operating this, an emergency signal composed of a weak electric wave can be emitted without causing vibration or the like. You can

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. 1 is a schematic block diagram of a portable emergency transmitter according to an embodiment of the present invention, FIG. 2 is a schematic explanatory diagram of a receiver, and FIG. 3 is a layout diagram of receivers in a factory.

As shown in FIG. 1, a portable emergency transmitter 10 according to an embodiment of the present invention includes a piezoelectric vibration gyro sensor 11 which is an example of a piezoelectric vibration sensor, an amplifier 12 which amplifies this signal, and an amplifier 12. The comparators 13 and 14 connected to the amplifier 12, the short-time timer 15 reset by these signals, the buzzer 16 and the transmission unit 17 which are operated by the output of the short-time timer 15, and power to these are supplied. And a power supply unit 18. These will be described in detail below.

As the piezoelectric vibration gyro sensor 11, for example, a gyrostar (registered trademark) manufactured by Murata Manufacturing Co., Ltd. is used, which is operated by applying a voltage of 5 V (+ V) to detect the rotation direction of a specific shaft. , When it doesn't operate, the reference voltage of about 2.3 ± 1V is emitted to the output side, but when the angular acceleration is given to the right rotation direction, the output voltage rises from the reference voltage and the angular acceleration is given to the left rotation direction. Then, it emits a voltage lower than the reference voltage. The amplifier 12 amplifies the output of the piezoelectric vibration gyro sensor 11 in a high input resistance state and outputs the same voltage as the input voltage, which is simultaneously input to the positive terminal of the comparator 13 and the negative terminal of the comparator 14. are doing.

The comparator 13 detects a right rotation output larger than the reference voltage, and the comparator 14 detects a left rotation output smaller than the reference voltage. 19 to 21 act as a voltage dividing resistor, and in particular, 20 is a variable resistor for adjusting the sensitivity by changing the reference voltage. Here, it is also possible to provide a buffer amplifier composed of a transistor or the like on the output side of the comparators 13 and 14 and to attach a display lamp such as a light emitting diode, whereby the piezoelectric vibration gyro sensor 11 outputs a right rotation output. The case and the case where the left rotation output is generated can be easily detected, and the operation of the device can be confirmed.

The outputs of the comparators 13 and 14 are input to the reset terminal of the short time timer 15 via the OR circuit 22. A timer of maximum 120 seconds is used as the short-time timer 15, and a variable resistor 23 is connected to the timer so that the output time can be arbitrarily changed. Because of this, if there is an output from one of the comparators 13 and 14, the short-time timer 15 is reset and counting starts from the beginning, but the short-time timer 15 counts. If there is no output from the comparators 13 and 14 during the end time, the short-time timer 15 counts up and outputs an output, and sends a signal to the buzzer 16 and the transmitter 17 to operate them. ing.

A normal piezoelectric small buzzer is used as the buzzer 16, and the transmitter 17 is composed of an ordinary FM transmitter and emits a weak radio wave as an emergency signal. It is also possible to modulate the identification code (ID code) of each portable emergency transmitter in the transmitter 17.

The transmitter 17 is further provided with an emergency transmission switch 27. By operating this emergency transmission switch 27, an emergency signal composed of a weak radio wave is transmitted and a reset switch 28 is activated. It is designed to stop sending emergency signals.

The power supply unit 18 uses a commercially available constant voltage element 29 to convert the voltage 6 to 9 V of the battery 30 into 5 V and supply it to each unit. Reference numeral 31 is a smoothing capacitor, 31a is a power switch, + V is a positive pole of the power source, and GND is a negative pole of the power source.

FIG. 2 shows a receiver 32 which receives a weak signal from the portable emergency transmitter 10. The receiver 32 is composed of an FM receiver which receives the weak radio wave which is the emergency signal. As shown in FIG. 3, it has a call switch 34 for calling the control room 33 and a reset switch 35 for the call switch 34. A large number of these receivers 32 are arranged in the factory 36 at a fixed distance, and are connected to the management room 33 by wire.

The receivers 32 are arranged at intervals of about 60 to 70 m so that the reception ranges A to H of the weak radio waves from the portable emergency transmitters 10 do not largely overlap. As a result, when the person carrying the portable emergency transmitter 10 falls in the factory, the piezoelectric vibration gyro sensor 11 does not operate, so the transmitter 17 transmits a weak radio wave as an emergency signal. Is received by one of the receivers 32 in the areas A to H, the corresponding indicator lamps A to H in the control room 33 are lit, and the buzzer 37 arranged in the control room 33 is activated. In addition to notifying that there was an accident, it also notifies the general location of the accident.

[0016]

[Effect of device]

 As is apparent from the above description, the portable emergency transmitter according to claims 1 to 3 detects the movement of the person carrying the portable emergency transmitter with the piezoelectric vibration sensor. Unlike the sensor, the posture of the person who carries it is free, and it works correctly even when lying down and working. In particular, the output of the piezoelectric vibration sensor resets the timer for a short time, and when the piezoelectric vibration sensor does not reset the timer, it outputs an emergency signal, so the circuit is simple and its adjustment is easy. Then, for example, if the person stays still for a relatively long time, the timer will operate for a short time and the buzzer and transmitter will operate, but if it is not necessary to call a person, a portable emergency transmission will be added. Since it is possible to give vibration to the machine to stop the operation of the buzzer and stop the operation of the transmitter, it is not necessary to transmit a continuation signal informing that an accident has occurred. In this case, the person who receives the emergency signal can judge that it is an erroneous signal because it is not a continuous signal when the transmission of the emergency signal stops within a short time after receiving the emergency signal. Particularly, in the portable emergency transmitter according to the second aspect, since the piezoelectric vibration gyro sensor is used as the piezoelectric vibration sensor to display the right rotation and the left rotation, the operation state of the device can be simplified. I can confirm. Further, in the portable emergency transmitter according to claim 3, since the emergency transmission switch by manual input is provided, by operating this emergency transmission switch when there is sufficient consciousness, the emergency signal is transmitted. Can be issued.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a portable emergency transmitter according to an embodiment of the present invention.

FIG. 2 is a schematic explanatory diagram of a receiver.

FIG. 3 is a layout diagram of receivers in a factory.

[Explanation of Codes] 10 Portable Emergency Transmitter 11 Piezoelectric Vibration Gyro Sensor (Piezoelectric Vibration Sensor) 12 Amplifier 13 Comparator 14 Comparator 15 Short Timer 16 Buzzer 17 Transmitter 18 Power Supply 19 Voltage Dividing Resistor 20 Variable Resistor 21 Dividing Resistor 22 OR circuit 23 Variable resistance 27 Emergency transmission switch 28 Reset switch 29 Constant voltage element 30 Battery 31 Smoothing capacitor 31a Power switch 32 Receiver 33 Management room 34 Calling switch 35 Reset switch 36 Factory 37 Buzzer

Claims (3)

[Scope of utility model registration request] 1. A piezoelectric vibration sensor, an amplifier for amplifying an output voltage of the piezoelectric vibration sensor, a comparator connected to the output side of the amplifier for detecting a vibration signal included therein, and an output of the comparator as a reset signal. A short-timer, a buzzer driven by the output of the short-timer, a transmitter that transmits weak radio waves that become an emergency signal by the output of the short-timer, and a power supply that supplies power to these. A portable emergency transmitter characterized by: 2. The piezoelectric vibration sensor comprises a piezoelectric vibration gyro sensor, the comparator comprises two comparators having different reference voltages, and the output of the piezoelectric vibration gyro sensor is rotated by the two comparators to a right rotation output and a left rotation. The portable emergency transmitter according to claim 1, wherein the output is separately output and the indicator lamps are turned on independently. 3. The portable emergency transmitter according to claim 2, further comprising an emergency transmission switch that is manually input to operate the transmission unit.