摘要:
The invention relates to a processor device system (100) with a maintenance function, which processor device system (100) has a processor device (111) with one or more field devices (101, 102, 103, 104) and at least one control unit (10). The processor device system (100) also has at least one testing device (121) for performing maintenance on the one field device or on at least one of the plurality of field devices. The at least one test device and/or the at least one field device is/are configured to inform the at least one control unit of imminent or commenced maintenance of the field device by the test device. The invention relates to a field device and to a test device which are each suitable for being used in the specified processor device system (100).
摘要:
The invention relates to a fire alarm call box for detecting gaseous and powdery combustion products, comprising at least one optical transmitter and at least two optical receivers, each for sending an electrical signal to an evaluation unit connected downstream. At least one of said optical receivers (28) is located beyond a direct range of radiation (8) of the optical transmitter (2) and acts as a scattered light receiver. At least one other optical receiver (4) is located within the direct range of radiation (8) of the optical transmitter (2). A gas sensitive layer (18) is connected upstream of this optical receiver (4). Upon contact with a specific gas, said layer preferably absorbs light components of a certain narrow wavelength range.
摘要:
A method for the operation of an analytical circuit for an electrochemical cell is disclosed, whereby the analytical circuit is switched on for a first period and switched off for a second period. In the above, the ratio between the first and second period is less than 1. The measured value from the electrochemical cell is subjected to a current amplification, which forms part of the analytical circuit.
摘要:
The invention relates to an optical diaphragm that serves to realize an optical diaphragm without the provision of a mechanical device. The invention exploits an electro-optical effect in order to switch an electro-optically active material, which is located between a polarizer and an analyzer, between a transparent and non-transparent state. This can be used, in particular, for producing a camera, establishing an area monitoring and for a fire alarm. In particular, it is possible to sequentially scan an entire area while using only one image recorder.
摘要:
A method for fire recognition is disclosed, serving to avoid false alarms, in which an alarm threshold is determined depending upon signal parameters received from at least one sensor signal. False alarms can thus be advantageously filtered out. The above is further improved by the establishment of an alarm interval, for which the alarm threshold must be exceeded, in order for an alarm to be recognised. Said alarm interval can also be adapted according to signal parameters. An upper and lower limit are set for both alarm interval and alarm threshold, in order to incorporate a certain security, such that the alarm interval and alarm threshold do not adopt values which would put a functioning of the fire alarm at risk. Several sensor signals may be used, whereby the signal parameters are then generated by linking the sensor signals. A light-scattering smoke detector, fitted with a labyrinth and a detector chamber is preferably used.
摘要:
The invention relates to a signaling fire detector comprising a sensor (10), said sensor having at least one conventional fire detecting sensor (12, 13), and comprising a control and analyzing unit (9). Said unit is connected to the sensor (10), is configured for analyzing the signal (S2, S3) supplied by the at least one fire detecting sensor, and is optionally configured for outputting at least one control signal (T1; T2) for the fire detecting sensor(s) (12, 13). The inventive signaling fire detector is characterized in that the sensor (10) additionally comprises a chemosensor (11) or a chemosensor array which is likewise connected to the control and analyzing unit (9) for analyzing a detection signal (S1), and which is configured based on a chemical sensor operating principle for detecting gas and/or smoke emissions produced by fire. The additional chemosensor is preferably an optoelectronic gas sensor which operates on the basis of an optode or is preferably an optoelectronic gas sensor array which also operates on the basis of an optode.
摘要:
The invention relates to a device for deflecting optical beams, comprising an array of mirror elements, each mirror element being rotatable at any angle independently from another mirror element. Said array can be advantageously produced by micromechanics. The rotation can be brought about capacitatively or thermally. The array can be disposed in a camera as a deflection mirror or as a lens, and can be used to scan a spatial element. It can be used both in passive infrared detectors as well as in stray light smoke detectors.
摘要:
The invention relates to a fire alarm call box for detecting gaseous and powdery combustion products, comprising at least one optical transmitter and at least two optical receivers, each for sending an electrical signal to an evaluation unit connected downstream. At least one of said optical receivers (28) is located beyond a direct range of radiation (8) of the optical transmitter (2) and acts as a scattered light receiver. At least one other optical receiver (4) is located within the direct range of radiation (8) of the optical transmitter (2). A gas sensitive layer (18) is connected upstream of this optical receiver (4). Upon contact with a specific gas, said layer preferably absorbs light components of a certain narrow wavelength range.