Abstract: The presence detector has a passive infrared sensor for detecting the presence of persons in a room, an image sensor operating in the visible spectral range and an electronic evaluator for the evaluation of signals from these sensors. The signal from the passive infrared sensor is used to actuate the image sensor and, if necessary, to switch on the room lighting. Once activated, the image sensor is used to detect both movement and occupancy of a space being monitored. Application of the presence detector for the “on-demand” activation and/or control of conditioning facilities of a room, wherein the signals of both sensors are used for the control of the conditioning facility.

Abstract: The invention concerns a flame monitoring system and a method of monitoring a flame with a flame sensor (1) which converts the radiation emanating from the flame into a flame signal (U1) and a flame signal amplifier (40) which converts the flame signal (U1) into an output signal (U5). A frequency-selective arrangement (6, 17, 18, 19) detects the presence of mains frequency-harmonic signals in the flame signal (U1) and activates the flame signal amplifier (40) when there are no mains frequency-harmonic signals in the flame signal (U1) and deactivates the flame signal amplifier (40) when there is a flame signal (U1) with periodic signals or no flames signal (U1) or a test signal (T). In that respect the frequency selective arrangement (6, 17, 18, 19) has a frequency detector (18) which detects the absence of mains frequency-harmonic flame signals (U1) and appropriately activates or deactivates the flame signal amplifier (40) by way of switching means (6, 17, 18, 19).

Abstract: An operating mechanism for operating an actuating member is provided with an electric motor (11, 12), a resetting spring (3) and a centrifugal brake (20), wherein the actuating member can be operated in a first direction of movement by the electric motor (11, 12) activated by means of a control or regulating device, and in a second direction of movement by means of the resetting spring (3). In accordance with the invention, a brake body (22) of the centrifugal brake (20) is arranged on the rotor (12) of the electric motor (11, 12). The centrifugal brake (20) arranged directly on the rotor (12) can be configured such that a braking effect is generated only when the actuating member is operated by the resetting spring (3). When operated by the switched-on electric motor (11, 12), on the other hand, the centrifugal brake (20) has no braking effect. By means of the centrifugal brake (20) the speeds that can be reached are limited to the extent that no spurious vibrations and noises occur.

Abstract: A detector device for detecting the presence of airborne particles such as smoke includes a light source, an optical bridge, a measurement path, a reference path, a measurement receiver and a reference receiver. The optical bridge, in addition to the light source and the measurement and reference receivers, are the only optical elements of the detector device. The optical bridge includes two circular apertures arranged downstream of the light source along the radiation path. The light source is arranged in a chamber having an air reservoir, whose surface area is substantially greater than that of the light source. A temperature drift curve is determined by heating the light source and storing the detector signal at different temperatures.

Abstract: A predictive apparatus for controlling or regulating supply values (T_VRL) includes a first data store in which rules, based on a linear consumer model, for calculating process values are stored, a second data store in which rules for restrictions or limit values to be observed for process values and for values derived from process values are stored, and further also means for repeatable optimizing of the energy consumption or of the energy costs with the aid of linear or quadratic programming. The apparatus is configured such that the optimizing can be carried out over a sliding time horizon.

Abstract: An apparatus for detecting the temperature of a room (2) includes means (4) for generating and receiving sound waves, means (5) for determining the transit time of the sound waves for a certain distance (x) in the room (2) and means (10) for calculating the temperature (U) of the room (2) by means of the ascertained transit time (t) of the sound waves for the distance (x) in the room (2). An approximation procedure for ascertaining the distance (x) is automatically executed. The temperature (U) ascertained in that way corresponds to a mean room temperature over the distance (x).

Abstract: A bus subscriber node (2) having a feed module (10) and means (9) for transmitting and/or receiving information by way of the bus (1) has a switch module (11) which is actuatable by way of a switching logical member (12) and by which the feed module (10) can be connected to the bus (1) or by which the feed module (10) can be separated from the bus (1). The bus subscriber node (2) also has a memory cell (14) and a monitoring member (13) for detecting a current supplied by the feed module (10). The switching logical member (12) is coupled to the memory cell (14) and the monitoring member (13) in such a way that the feed module (10) can be separated from the bus (1) on the basis of an item of information stored in the memory cell (14) or on the basis of a certain current level detected by the monitoring member (13). With the memory cell (14) the bus subscriber node (2) can be configured as a feeding or as a non-feeding bus subscriber node and can be used in communication networks with central and decentral feed.

Abstract: An actuating drive (1) has a housing (4) which also affords protection from splashed water and which comprises two housing portions (5; 6), wherein the two housing portions (5; 6) each have an edge (20; 40) with a respective end face (21; 41) which are disposed in opposite relationship when the housing portions are assembled. When the two housing portions (5; 6) are assembled zones which act in different ways are formed between the two end faces (21; 41). A first zone (Z1) in which the two housing portions (5; 6) are in contact with each other is provided on the housing (4) towards the exterior. A second zone (Z2) having a passage (55) is provided beside the first zone (Z1), towards the interior. The passage (55) of the second zone (Z2) is closed towards an internal space (33) of the housing by a third zone (Z3) in which the two housing portions (5; 6) are not in contact with each other.

Abstract: The invention describes a shut-off valve having a double seat with an upper valve seat (7) of a diameter D1 and a lower valve seat (8) of a diameter D2 different to the diameter D1 (D1<D2), and a double-head setting member (12, 11, 10, 14) which in the closed condition prevents passage therethrough of a medium which is to be sealed off. The annular surface (D2−D1) of the double-head setting member (12, 11, 10, 14), which is acted upon by the medium to be sealed off and affords a closing force, and is formed from the outside diameter D2 and the inside diameter D1, is divided by a diameter D3 (D1<D3<D2) into at least two regions (10, 14) in order to distribute the closing force to the upper valve seat (7) and the lower valve seat (8).

Abstract: A safety device (1) for a fluid transmission has a diaphragm (4) which is arranged deflectably in a feed passage (8) and which has at least one through opening (2) for the fluid. A return passage (10) for the fluid from the chamber of the consumer (9) is of such a configuration and arrangement that it can be opened and closed by deflection of the diaphragm (4), wherein the diaphragm (4) is of such a configuration that, when the fluid flow in the feed passage (8) falls below a given value, the return passage (10) is opened. The pressure in a pressure chamber (9) of a consumer can be let off by the device (1) when a pump (7) is no longer conveying.

Abstract: Included in an arrangement for spatial monitoring or surveillance are an image sensor (5), a presence/movement detector (6), and control and evaluation electronics (2) with a processor stage (4) for evaluating signals from the sensor (5) and detector (6) in combination. Imaged objects can be categorized on the basis of their geometry and movement. The signal from the detector (6) can be used in interpreting sensed images.

Abstract: A motion detector based on the Doppler principle contains a microwave module for emitting a microwave signal containing at least two frequencies into a room under surveillance and for receiving the radiation reflected from the latter. An evaluation stage is connected to the microwave module and generates first and second Doppler signals from the received radiation. The first and second Doppler signals have a phase difference which is proportional to the distance of an object reflecting the microwave signal. The phase difference is determined by an integral transformation. In addition, the relative size of an object and the direction of travel of an object reflecting the microwave signal can be determined by the evaluation stage.

Abstract: During start-up a regulating device monitors the quality of the air ratio control in respect of time in accordance with the invention in that it observes the difference of a signal and comparison signal.

Abstract: The present invention describes a measuring device for a flame, in particular for use in a regulating device for a burner (13), comprising an ionization electrode (15) which is arranged in the flame region (14) of the burner (13) and to which an ac voltage is applied whereby a dc voltage component is superimposed in dependence on the ionization current.

Abstract: A regulating device (15) for a burner regulates the air-gas ratio by way of an ionization electrode (16). In the event of dynamic changes in output preliminary control is implemented in accordance with the invention with two or more stored characteristics.

Abstract: In a shutoff device, a shutoff body (2) is movable by a drive between abutments (1a, 5b). For the purposes of reducing noise and preventing so-called “valve chatter”, a friction brake (6) is movable with the shutoff body (2) between control bodies (5a; 3d, 3e) at which the friction brake (6) arrives a friction distance (R1, R2) before the time at which the shutoff body (2) reaches each abutment (1a, 5b). The friction brake (6) rubs along a friction surface (3a; 8a) during the movement of the shutoff body (2) along the friction distance (R1, R2). (FIG.

Abstract: The invention describes a shut-off valve having a double seat with an upper valve seat (7) of a diameter D1 and a lower valve seat (8) of a diameter D2 different to the diameter D1 (D1<D2), and a double-head setting member (12, 11, 10, 14) which in the closed condition prevents passage therethrough of a medium which is to be sealed off. The annular surface (D2−D1) of the double-head setting member (12, 11, 10, 14), which is acted upon by the medium to be sealed off and affords a closing force, and is formed from the outside diameter D2 and the inside diameter D1, is divided by a diameter D3 (D1<D3<D2) into at least two regions (10, 14) in order to distribute the closing force to the upper valve seat (7) and the lower valve seat (8).

Abstract: A housing for an alarm includes a base adapted for mounting on a wall, a cover detachably connectable to the base and a sabotage detector for triggering an alarm signal in the event of unauthorized removal of the cover or forcible removal of the alarm from the wall. The base includes a breakaway portion which can be formed as strip-shaped region bordered by weak points. A number of screw insertion points extend through the breakaway portion for fastening the breakaway portion to a wall with one or more screws. A web projects from the breakaway portion and towards the cover such that when the housing is closed, the web engages a contact switch mounted in the cover. In the event of the housing being ripped off the wall, the strip-shaped region is broken off the base and remains on the wall, thereby opening the contact switch. The web is also disengaged from the contact switch in the event of unauthorized removal of the cover from the base.

Abstract: The infrared detector contains an entrance window for infrared radiation, an infrared sensor with an evaluation circuit and an anti-masking device having an optical transmitter and an optical receiver for detecting phenomena or optical changes immediately in front of the detector and/or changes in the optical properties of the entrance window. The signals of the anti-masking device are evaluated in two channels, wherein one channel responds to temporally limited phenomena or changes and the other channel responds to temporally stable phenomena or changes. A combined evaluation of the signals in the two channels takes place. In the combined evaluation, the channel processing the signals of the infrared sensor is preferably also included. As a result, the infrared detector acquires an increased immunity to false alarms and a higher sensitivity.

Abstract: A device having an image-providing sensor, hereinafter designated as “image sensor,” operating in the visible and near-infrared range, an thermal image-providing sensor, hereinafter designated as “thermal-image sensor,” operating in the thermal radiation range and having a lower resolution than the image sensor, and an electronic evaluation system. The evaluation system determines whether one or both of the signals generated by the sensors are used for determining whether an alarm condition exists. As a result, the detectability of low-contrast objects is increased, the false alarm rate is reduced, and object classification is made possible.