Abstract:
A field transmitter (250) includes field device circuitry (216) configured to measure or control a process variable. A first process control loop terminal (202) is configured to couple to a two-wire process control loop (206) which carries a loop current I loop . A second process control loop terminal (204) configured to couple to the two-wire process control loop (206). A switching regulator (212) has an input and an output. The output is coupled to the transmitter circuitry (216) and arranged to provide power to the transmitter circuitry (216). A variable voltage source (232) having an input electrically coupled to the first process control loop terminal (202), and a voltage output coupled to the input of the switching regulator (212) and a control input. The voltage output is a function of the control input.
Abstract:
The invention describes a method of actuating a switch (S) between a device (Di) to be controlled and a power supply (P), which method comprises the steps of generating a first electrical signal (14) in a remote control unit (10) and converting the first electrical signal (14) into electromagnetic radiation (EM) by means of a first transmitting antenna (Ti) of the remote control unit (10). A first detecting antenna (Ri) of a remote control interface module (20) of the device (Di) to be controlled detects the electromagnetic radiation (EM) to obtain a second electrical signal (24), which is passively converted into a switch actuating signal (25). The switch actuating signal (25) is actuated to switch the device (Di) to be controlled between an operating mode in which current is drawn from the power supply (P) by the device (Di) during operation, and an inactive mode in which the device (Di) is completely disconnected from the power supply (P) so that no current is drawn by the device (Di). The invention further describes a system (1) for actuating a switch (S) between a device (Di) to be controlled and a power supply (P). The invention also describes a remote control interface module (20) and a remote control unit (10).
Abstract:
In a remote operation apparatus of a working machine including a working machine side transmission/reception unit (21) and a radio remote operation means (3) having a remote control side transmission/reception unit (31), an ON/OFF control circuit (32) for controlling the operation/non-operation state of the remote control side transmission/reception unit (31) is disposed to the radio remote operation means (3), and the working machine side transmission/reception unit (21) is called when the remote control side transmission/reception unit (31) is in an operating state by that the ON/OFF control circuit (32) is turned on, and the data showing the driving state of the working machine (1) is transmitted from the working machine side transmission/reception unit (21) to the remote control side transmission/reception unit (31) to thereby reduce an electric power consumption amount on the radio remote operation means (3).
Abstract:
The invention relates to a measuring device (1) for measuring the relative rotational speed of a rotor that rotates with respect to a stator (2), having at least one inductive transmitter (4) carried by the stator (2), said transmitter comprising at least one induction coil (6), in which an electrical voltage representing a rotational speed measuring signal for the rotational speed is induced by the rotation of the rotor provided with circumferential marks. The invention provides for a transmission unit (10) that can be supplied with electric energy and is based on voltage induced by the inductive transmitter (4), said transmission unit wirelessly transmitting at least the rotational speed measuring signal, or a signal derived therefrom, to a receiver unit (12).
Abstract:
A method for controlling a group of wirelessly controlled appliances comprising at least one appliance in a home automation network comprising a master controller, characterized in that it comprises: • a reception step in which the master controller receives a wireless command intended for an appliance of the group, then • a connection step in which the master controller connects the appliance to mains power, if the appliance was previously disconnected from the mains power, then • a disconnection step in which the appliance is automatically disconnected from mains power.
Abstract:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum stromsparenden Betrieb einer Vielzahl von RFID-Datenträgern, wobei der RFID-Datenträger eine Sende- und Empfangsantenne aufweist, über welche Daten zu oder von einer Lese-Schreibeinheit mittels einem Funksignal gesendet bzw. empfangen werden und der Datenträger zum Empfang eines Energiesparsignals ausgebildet ist, welches den Datenträger in einen sogenannten Schlafmodus versetzt. Die Verfahren ist dadurch gekennzeichnet, dass die Lese- und Schreibeinheit einen so genannten bedingten Schlafbefehl an alle RFID-Datenträger sendet und die im Sendefeld diese Informationen empfangenden RFID-Datenträger die gesendete Bedingung mit einer im RFID-Datenträger erfassten Zustand/Information verglichen wird, wobei diese im RFID-Datenträger erfasste Bedingung von einem Sensoreingang abhängt, der mit dem RFID-Datenträger verbunden ist. Die Vorrichtung ist dadurch gekennzeichnet, dass die Übertragung der Signale zwischen der Lese-Schreibeinheit und des Datenträgers mittels einer am Lese-Schreibgerät angeordneten Sende-Empfangsantenne und einer am Datenträger entsprechend angeordneten Sende- und Empfangsantenne ausgebildet ist.
Abstract:
System comprising at least one master unit and a plurality of slave units, wherein said master unit and said slave units comprise means for performing communication via radio frequency channels. The at least one master unit comprises means for transmitting control signals to said slave units, and the slave units are each provided with a unique address and are each associated with a controllable device. The at least one master unit comprises means for executing a sequential transmission of control signals to at least one of said slave units upon activation of a function control key. The master unit is configured for transmitting a status request signal to a slave unit that has received a control signal, which status request signal is transmitted after a time delay corresponding to the time taken by the slave unit to perform an operation in response to the received control signal.
Abstract:
An intermediate station transmits a supervisory signal sent form a given controlled device to a controlled device associate with the given device as a control signal. An intermediate-station input unit extracts a supervisory signal, which is a current signal superimposed on a signal transmitted through a data signal line, in every clock cycle. An intermediate-station output unit obtains the supervisory signal in every clock cycle, and outputs a control signal, which is a pulse-width-modulated voltage signal, onto the data signal line in the same clock cycle in which the supervisory signal has been extracted.