Abstract:
The invention relates to an energy-saving sampling method and an electrical apparatus (1, 1'), particularly an electronic gas meter (1') or motion detector (1), for carrying out said method. The aim of the invention is to reduce power consumption (I) of the battery (105) in said method and apparatus (1, 1'). Said aim is achieved by sampling the test signal (100b, 101b) in a quasi continuous (13) manner by defining sampling time slots (14') during which sampling is done in an uninterrupted fashion while sampling gaps (14) during which no sampling is done are allowed between the sampling time slots (14'). Examples of embodiments include sampling gaps (14) at regular or random intervals, sampling gaps (14) with a variable duration and/or frequency and especially an increasing duration and/or frequency as the remaining service life of the battery decreases, and a lower sampling rate (f1, f2, f3) during the sampling time slots (14'), among others, resulting in an increased battery lifetime without substantially reducing test reliability.
Abstract:
The invention relates to a method and a device for measuring gas consumption by means of a gas meter (1). A gas meter (1) comprising a thermal flow sensor (1a) for determining mass flow signals (SM) and a calibrating device used as an energy measuring appliance for emitting energy value signals (SE) is known. According to the invention, a gas type is determined by the gas meter (1) insofar as combustible and non-combustible gas mixtures (3) are differentiated. For a non-combustible gas mixture (3), the gas meter (1) is operated with calibration in mass units or units of volume under standard conditions (1/min), and for a combustible gas mixture (3), with calibration in energy units (kWh). Forms of embodiment include, inter alia, the measurement of a parameter (lambda, alpha, c, eta) of the gas (3) in order to determine the gas type; a gas quality sensor (1a) with the same structure as the thermal flow sensor (1a); and longer measuring intervals for a non-combustible gas (3) and shorter measuring intervals for a combustible gas (3). The advantages of the invention are, inter alia, reliable energy measurement as a result of the automatic differentiation between a non-accountable gas (3) and a high-quality useful gas (3); recognition of manipulation attempts; and automatic calorific value tracking even without calorific value measurement.
Abstract:
A radio linked motion alarm (1) and wireless actuator (8) system sends (4) a preset number of telegrams to its receiver (11) on installation with power changing in steps so that the processor (1) can compare received with sent to determine an optimum transmit power and display (12) it for manual setting.
Abstract:
A radio linked motion detector (13) has several double sided sensor circuit boards each with complete ground plane and infrared sensor (2) and amplifier (7) on opposite sides feeding a single processor (10) circuit board (8) and adjustable threshold daylight sensor (9) switching an autonomous power supply (12).
Abstract:
The device has a current converter with an annular ferromagnetic core (5), a current-carrying primary winding (7) fed through the core opening (6) and a secondary winding (8) wound round a section of the core. The primary winding is made in at least three-phase form, at least three of the phases (R,S,T) are fed through the opening and the currents in these phases are at least partly mutually opposed.
Abstract:
The arrangement has an infrared sensor (10) and a solar module (1) as an energy supply device. The optical lens systems for the infrared sensor and solar module are arranged in the housing window (20) of the motion alarm. All layers (2-6) of the solar module are transparent or at least semi-transparent to infrared radiation and a collecting lens forms frontal encapsulation.
Abstract:
The movement sensor and actuator system has a current supply unit comprising solar cells (7) and an energy store (6) connected to the cells. The actuator controls a light or lamp (5) which radiates at least some light onto the solar cells. An energy store monitor (8) determines the current charge state of the energy store. The monitor sends a signal to switch the light on when the charge state of the energy store falls below a minimum value, without movement needing to be sensed.
Abstract:
The system has movement alarm units (1, 4, 7) monitor the status of the system, and transmitters (3, 6, 9) transmit status signals (SA) corresponding to the status from the alarm units to an actuator (10). The status signals relate to system activity condition, system component condition, system position and system information. The status signals are delivered to indicators (13-16) in the actuator for indicating the status.