Abstract: A monitoring terminal device is provided which is capable of reducing its power consumption to a minimum and of being fully operated even indoors by using a solar cell as a power source. In the monitoring terminal device including a sensor unit and a transmitting unit having a wireless communication function to transmit, by wireless, a sensor monitoring output, the sensor and wireless transmitting unit are activated intermittently, and, when the monitoring terminal device is not operating, supply of power to the sensor unit and transmitting unit is stopped and a control processor is put into a sleep state, which enables reduction of power consumption to a minimum. This ensures a long operation of the monitoring terminal device even in an environment in which power is not supplied from the outside.

Abstract: To enable indoor and outdoor physical conditions to be detected for very fine control thereof. Self-contained transmitting sensors 10-1 through 10-8 which monitor physical quantities and convert them into electrical data signals for radio-transmission are disposed in desired positions in housing. The wirelessly transmitted data signals are received by a portable information terminal 20 for controlling the operation of a device 30 to be controlled based upon the received information and its information history. By wearing a self-contained transmitting sensor 10-9 on a user 40 physical quantities such as temperature, humidity and illumination at a place in which the user is located can be controlled to desired values wherever the user moves.

Abstract: A monitoring terminal device is provided which is capable of reducing its power consumption to a minimum and of being fully operated even indoors by using a solar cell as a power source. In the monitoring terminal device including a sensor unit, the transmitting unit to transmit, by wireless, a sensor monitoring output, and a control unit which control the sensor unit and the transmitting unit, further including a power supply section, when only state change of object to be monitored, that is, a output of the sensor unit is detected the control unit and the transmitting unit are started to transmit monitoring information by the sensor unit. When the sensor unit and the generating section are not activated supply of power to the sensor unit and the generating section is stopped and the control unit by itself is put into standby state, which enables reduction of power consumption to a minimum.

Abstract: A monitoring terminal device is provided which is capable of reducing its power consumption to a minimum and of being fully operated even indoors by using a solar cell as a power source. In the monitoring terminal device including a sensor unit and a transmitting unit having a wireless communication function to transmit, by wireless, a sensor monitoring output, the sensor and wireless transmitting unit are activated intermittently, and, when the monitoring terminal device is not operating, supply of power to the sensor unit and transmitting unit is stopped and a control processor is put into a sleep state, which enables reduction of power consumption to a minimum. This ensures a long operation of the monitoring terminal device even in an environment in which power is not supplied from the outside.

Abstract: To enable indoor and outdoor physical conditions to be detected for very fine control thereof. Self-contained transmitting sensors 10-1 through 10-8 which monitor physical quantities and convert them into electrical data signals for radio-transmission are disposed in desired positions in housing. The wirelessly transmitted data signals are received by a portable information terminal 20 for controlling the operation of a device 30 to be controlled based upon the received information and its information history. By wearing a self-contained transmitting sensor 10-9 on a user 40 physical quantities such as temperature, humidity and illumination at a place in which the user is located can be controlled to desired values wherever the user moves.

Abstract: A monitoring terminal device is provided which is capable of reducing its power consumption to a minimum and of being fully operated even indoors by using a solar cell as a power source. In the monitoring terminal device including a sensor unit, the transmitting unit to transmit, by wireless, a sensor monitoring output, and a control unit which control the sensor unit and the transmitting unit, further including a power supply section, when only state change of object to be monitored, that is, a output of the sensor unit is detected the control unit and the transmitting unit are started to transmit monitoring information by the sensor unit. When the sensor unit and the generating section are not activated supply of power to the sensor unit and the generating section is stopped and the control unit by itself is put into standby state, which enables reduction of power consumption to a minimum.

Abstract: Bothway optical communication is carried out through a wavelength division multiplex system between two terminal stations (11a, 12a), each having a two-beam interference type filter (15) coupled with an optical cable (10) for multiplexing and/or de-multiplexing transmitted light and received light. The filter (15) has passbands and attenuation bands having periodic characteristics for the wavelength in the communication wavelength band. The wavelength of the transmitted light is essentially the same as the wavelength of the received light in each terminal station, with a small offset of the two wavelengths less than 5 nm. The oscillation wavelength of the laser (21) for transmission is adjusted so that it coincides with the passband of the filter, which doubles as a reference wavelength of the oscillation wavelength of the laser.

Abstract: A tuning fork type vibrator for an optical chopper in a photosensor, which vibrator oscillates at a single frequency. The vibrator comprises vibrating plates so disposed as to face each other with a predetermined spacing therebetween, and a stem portion obtained by bonding together bent portions located at one end of each of said vibrating plates.