Abstract: A flame detecting arrangement including: at least one flame detector, arranged with its field-of-view covering a predetermined area; at least one movement sensor, arranged together with the at least one flame detector; and at least one processing device. The at least one processing device is arranged to: receive signals from the movement sensor; detect movement of the flame detector based on these signals; and alert an operator and/or a control system if movement of the flame detector has been detected, in order to enable correction of the field-of-view of the flame detector to the desired field-of-view.

Abstract: A system for determining a risk level for particles moving along a path. —The system includes a sensor arrangement including at least one set of sensing elements including at least two sensing elements arranged to co-operate with mutually separated sensing zones along the path of movement of the particles to detect a signal related to temperature of the particles. The system further includes a processing device arranged to: receive signals from the sensor arrangement; form signals from the sensing elements into a pulse train when a particle moves through field-of-view of the sensor arrangement; based on the pulse train, determine a risk level for the particles; and adapt at least one parameter used in the determination of the risk level based on at least one property of the particles moving along the path of movement from the first position to the second position.

Abstract: A system for monitoring of temperature trends for particles moving along a path of movement from a first position to a second position includes a sensor arrangement and processing device. The sensor arrangement includes at least two sensing elements detecting radiation emitted from the particles, arranged to co-operate with mutually separated sensing zones along the path of movement of the particles to detect a signal related to the temperature of particles. The processing device is arranged to: receive signals from the sensor arrangement; form signals from the at least one set of sensing elements into at least one pulse train when a particle moves through the field-of-view of the sensor arrangement; and based on this at least one pulse train monitor changes over time in the temperature of particles moving through the field-of-view of the sensor arrangement by monitoring changes over time in the wavelength distribution of the radiation emitted from the particles.

Abstract: In accordance with one or more embodiments herein, a flame detecting arrangement 100 is provided. The flame detecting arrangement 100 comprises: at least one optical flame detector 110, arranged with its field-of-view covering a predetermined area; at least one movement sensor 120, arranged together with the at least one flame detector 110; and at least one processing device 180 arranged together with the at least one flame detector 110. The at least one processing device 180 is arranged to: receive signals from the movement sensor 120; detect abnormal movement of the flame detector 110 based on these signals; and alert an operator and/or a control system 200 if abnormal movement of the flame detector 110 has been detected. This enables the field-of-view of the flame detector to be corrected to the desired, preferably the original, field-of-view.

Abstract: A system for determining a risk level for particles moving along a path of movement from a first position to a second position includes a sensor arrangement and processing device. The sensor arrangement includes at least one set of sensing elements including at least two sensing elements arranged to co-operate with mutually separated sensing zones along the path of movement of the particles to detect a signal related to temperature of the particles. The processing device is arranged to: receive signals from the sensor arrangement; form signals from the sensing elements into a pulse train when a particle moves through field-of-view of the sensor arrangement; and based on the pulse train, determine a risk level for the particles. The processing device is arranged to adapt at least one parameter used in the determination of the risk level based on at least one property of the particles moving along the path of movement from the first position to the second position.

Abstract: A system for monitoring of temperature trends for particles moving along a path of movement from a first position to a second position includes a sensor arrangement and processing device. -The sensor arrangement includes at least two sensing elements detecting radiation emitted from the particles, arranged to co-operate with mutually separated sensing zones along the path of movement of the particles to detect a signal related to the temperature of particles. The processing device is arranged to: receive signals from the sensor arrangement; form signals from the at least one set of sensing elements into at least one pulse train when a particle moves through the field-of-view of the sensor arrangement; and based on this at least one pulse train monitor changes over time in the temperature of particles moving through the field-of-view of the sensor arrangement by monitoring changes over time in the wavelength distribution of the radiation emitted from the particles.

Abstract: A flame detecting arrangement including: at least one flame detector, arranged with its field-of-view covering a predetermined area; at least one movement sensor, arranged together with the at least one flame detector; and at least one processing device. The at least one processing device is arranged to: receive signals from the movement sensor; detect movement of the flame detector based on these signals; and alert an operator and/or a control system if movement of the flame detector has been detected, in order to enable correction of the field-of-view of the flame detector to the desired field-of-view.

Abstract: The present invention relates to a system and to an arrangement for evaluating in a defined space or area a delimited area (7) in which there is a degree of urgency greater than the degree of urgency in respect of the remainder of said space (1), wherein there is disposed within said space or area (1) a plurality of sensors which can evaluate the current or ongoing degree of urgency on the basis of one or more criteria. Selected sensors (2, 3, 4) shall be connected to computer equipment (50) which includes storage elements (52, 53, 54) adapted for storing current criteria-related values in a chosen time order, and wherein a calculating circuit (51) included in or connected to said computer equipment (50) is adapted for evaluation of a calculated degree of urgency on the basis of time-dependent changes in the evaluated current values, and determining and establishing the local orientation or geographic location of the delimited area through the medium of the calculating circuit.

Abstract: The present invention relates to a system and to an arrangement for evaluating in a defined space or area a delimited area (7) in which there is a degree of urgency greater than the degree of urgency in respect of the remainder of said space (1), wherein there is disposed within said space or area (1) a plurality of sensors which can evaluate the momentary degree of urgency on the basis of one or more criteria. Selected sensors (2, 3, 4) shall be connected to computer equipment (50) which includes storage elements (52, 53, 54) adapted for storing momentary criteria-related values in a chosen time order, and wherein a calculating circuit (51) included in or connected to said computer equipment (50) is adapted for evaluation of a calculated degree of urgency on the basis of time-dependent changes in the evaluated momentary values.

Abstract: The invention comprises a detector arrangement adjustable for inclusion in a preventive protective system for a process plant comprising at least two sensor units (10, 10′), a unit (16a, 16b) for evaluating the output signal of each sensor unit and a calculation unit (17) capable of co-operating with the evaluating units (16a, 16b), the output signals of which calculation unit can cause an activating unit (18) to pass from a first position to a second position. One or more of a first category of sensor units (10) is designed, via its circuit (16a) for evaluating output signals, to be able to determine the energy content of a particle present. One or more of a second category of sensor units (10′) is designed, via its circuit (16b) for evaluating output signals, to be able to determine the fire tendency or tendency to some other damage of the particle surroundings.

Abstract: The present invention relates to a detector arrangement inlcuded in a preventative, protective system. The sensor lobes of at least two sensor units or sensor sections are arranged to cover the cross-sectional area of a tubular transport device. The arrangement includes a unit for evaluating the output signals of the sensor units, and an activation unit which is adapted to evaluate sensed sub-intensities relating to wavelength ranges and each deriving from said sensor units and to thus coordinate received wavelength-related and sub-intensity-dependent signals for calculating and establishing therefrom the relevant disposition of the particle to initiate fire and/or explosion or some other danger.

Abstract: A detector arrangement is included in a preventive safety system that can be used within a process in which loosely formed process material is produced in a first unit (1) and transported (3) to a receiving, second unit (2), wherein the treatment to which the material is subjected in said first unit is liable to produce one or more discrete particles which have a temperature sufficiently high to initiate fire and/or explosion within at least the second part or unit (2). The necessary transportation of the loose material between the first unit (1) and the second unit (2) is effected along a path which includes a stabilizing zone (7), a high temperature particle indicating zone (8), and an extinguishing zone (9), wherein the indicating zone includes one or more particle sensors (10).

Abstract: A preventive safety system may be used in a process in which loosely formed process material is produced in a first unit (1) and is transportable to a receiving, second unit (2), and in which process the treatment of material in the first unit is liable to generate a hazardous particle or particles which has/have a temperature which is sufficiently high to initiate burning and/or an explosion in at least the second unit.

Abstract: A device for eliminating fire risk due to hot particles (12) in the form of burning or glowing material passing within a pipeline (10). The device includes a valve (18) which can be controlled to block the pipeline when a risk of fire is indicated in the pipeline and/or connected parts, and a container (16) with an extinguishing agent. The extinguishing agent intended to be fed into the pipeline (10) as the pipeline is blocked by the valve preferably consists of a gas or liquid. The container (16) is connected to the valve (18) via a line (10) for the extinguishing agent. In this way, an extinguishing agent passing out of the container (16) will initiate the release of the valve (18).