摘要:
A patient monitoring system comprising a central station for analyzing and displaying patient data; a system receiver connected to the central station; and an antenna array connected to the system receiver and including a plurality of antennae, each having connected thereto a respective transmitter.
摘要:
There is provided a remote commander, or remote control of a remotely-controlled apparatus in which transmission data of another remote commander (2) is stored in a memory of the remote commander that belongs to a main body and the thus stored transmission data is transmitted again. In this remote commander, transmission data of the other remote commander (2) is stored in a RAM (1) as user remote control data, transmission data of the remote commander that belongs to the main body is stored in a ROM (3) as original remote control data and the original remote control data and the user remote control data are selected by switching means (4). Thus, the remote commander becomes more useful.
摘要:
An information transmitting apparatus includes a transmitting apparatus for transmitting control information; a receiving apparatus for receiving the control information; a transmission line provided between the transmitting apparatus and the receiving apparatus; and a load which operates in response to the output of the receiving apparatus; wherein the transmitting apparatus transmits the control information through the transmission line to the receiving apparatus within a given time period and the receiving apparatus makes the load operative on the basis of the control information received. The receiving apparatus has a circuit for detecting the reception interval of the transmission information from the transmission line and for generating an abnormality signal when that interval becomes a predetermined time or more.
摘要:
The operational status of equipment located at a base station is reported to a remote control terminal. The same audio channel that is used for sending audio signals and control signals to the base station is also used to carry the report signal. The control signals to the base station and the report signals from the base station are encoded tone burst signals. The report signal provides an indication of the proper receipt and execution of a control signal by the base station equipment. Equipment diagnostic signal and periodic checks of equipment performance are also reported by this system.
摘要:
A switching circuit for energizing a load, such as fluorescent lamp ballasts, in response to a control signal of preselected frequency superimposed on AC power circuits which supply the load. A triac is gated to conduct the AC power to the load by a circuit including an impedance element and a series resonant LC network tuned to the frequency of the control signal. The gate circuit is arranged to block the control signal during all but a small portion of each half cycle of the applied AC power, thereby reducing the consumption of control signal power.
摘要:
A battery powered ultrasonic remote control transmitter for controlling various functions associated with a television receiver, or the like, includes an arrangement for providing an audible indication that the battery voltage has fallen below a desired operating level. In one embodiment, when the battery voltage has fallen below the desired level, the electrical control signal for at least one control function is selectively amplitude modulated by an audio frequency signal before being coupled to the ultrasonic transducer. As a result, when the control function is selected, an operator is given an audible indication that the battery needs recharging or replacement.
摘要:
A remote control receiver for processing signals representative of a desired television channel number, each channel number being identified by a control signal lying in a respective band of frequencies. The channel number representative control signals are supplied to a multi-stage counter which is also supplied with regularly recurring timing or clock signals. The clock signals determine counting intervals during which the number of cycles of the received control signal are counted. The counter is arranged to provide frequency divided output signals having binary digits which correspond to a binary coded representation of the channel number.
摘要:
A centralized controlling apparatus is provided and includes a pair of frequency relays which are selectively responsive to two types of frequency signals, the same being different from a fundamental frequency and higher harmonics thereof. One of the two types of frequency signals is used as an opening signal and the other is used as a closing signal. The two types of frequency signals are respectively applied along with a fundamental frequency to a distribution or transmission line for a predetermined period of time such that two driving elements of a differential type relay are selectively operated in accordance with the switching of the frequency relays such that a main circuit to a load is either opened or closed.
摘要:
An ultrasonic remote control receiver having an amplifier whose gain is automatically controlled in response to the peak amplitude of an amplified electrical signal representative of the received sound signal and a level detecting circuit for producing control pulses in response to the portions of the amplified electrical signal which, after rectification, smoothing and integration with respect to time, exceed a predetermined voltage level.
摘要:
A locking system comprises locking means locking, for example, a drawer, an inductive pick-up and means for responding to an output from the pick-up to release the locking means, and a key device having an inductive field generator which can produce an output in the pick-up by induction at close range. The sensing system can be tuned to respond only to a key device generating one or more particular frequencies and a lockout arrangement can be provided to prevent release if any other frequency is present.