JP4668641B2 - How to adjust the scanning fire detector - Google Patents

Description

The present invention relates to a method for adjusting a scanning fire detector that scans a monitoring area and detects a fire and its position, and a scanning fire detector.

  Conventionally, a water gun system has been installed as a fire extinguishing equipment for facilities having a wide surveillance area such as a stadium and an exhibition hall. The water cannon system monitors the monitored area by optical horizontal and vertical scanning with a scanning fire detector, detects the fire from the received light signal due to the energy from the flame from the fire, calculates the fire source position, and discharges the water. The gun is directed to the fire source position by horizontal turning, and fire extinguishing water is sprinkled by controlling the water discharge pressure according to the distance to the fire source.

  The scanning fire detector has a rotating mirror rotated by a vertical scanning motor, and the rotating mirror receives a subject optical image incident from a monitoring area by a photoelectric conversion element through an optical system. In this case, only the light passing through the slit provided in the optical system is received by the photoelectric conversion element, whereby the area of each scanning area is defined.

  The scanning fire detector is installed at a position where the monitoring area is looked down from above. By rotating a rotating mirror using a double-sided mirror at a constant speed, the scanning area is scanned in the vertical direction. An angle range of 0 ° to 90 ° is scanned in the vertical direction, and every time one vertical scan is completed, the image is rotated stepwise by a horizontal scanning motor by a predetermined rotation angle.

FIG. 12 shows a mirror driving unit of a conventional scanning fire detector. A vertical scanning motor 134 rotates a rotating mirror 136 at a constant speed, and a vertical scanning range of 0 ° to 90 ° reflected by the rotating mirror 136 is obtained. Incident light from the corresponding warning area is imaged on the infrared detecting element 146 through an optical system including the reflecting mirror 140. The rotating disk 152 with the rotating mirror 136 is provided with projections 152a and 152b at two locations. Is detected by the photo interrupter 154, and a synchronization signal is output twice by one rotation of the rotating mirror 136, and a rotation angle range of 0 ° to 90 ° by one side of the rotating mirror 136 with reference to each synchronizing signal and an opposite surface Fires in the vertical scanning range of 0 ° to 90 ° in the monitoring area are monitored twice in the range of rotation angles of 180 ° to 270 ° with a horizontal turn in between.

  Each of the scanning areas finely divided within the monitoring area is driven by driving the rotating mirror, and photoelectrically converted into a detection signal corresponding to the intensity of the radiant energy by the photoelectric conversion element. This detection signal is converted into a predetermined reference value. By comparing and judging, it is judged in which scanning area in the monitoring area the fire has occurred.

  The position of each scanning area into which the monitoring area is subdivided is represented by a horizontal scanning angle θ and a vertical scanning angle α with respect to the scanning start position of the scanning fire detector, and the position of the scanning section (θ, α), that is, the horizontal scanning angle and vertical angle of the fire source position are output.

Such a monitoring area and a scanning section are determined based on design drawing data before the building is completed, and a water cannon system including a scanning fire detector is manufactured. Therefore, when installing a scanning fire detector, make sure that the reference position of the actual monitoring area of the building and the start position of the scanning of the fire detector are the same so that the range of the monitoring area of the building and the scanning range of the fire detector are Must be matched.
JP-A-5-305152 JP-A-9-81873

  However, in such a conventional scanning fire detector, as shown in FIG. 12, the synchronization signal is generated twice by one rotation of the rotating mirror 136 by the protrusions 152a and 152b provided at two positions of the rotating disk 152. The output of the monitoring area is 0 ° twice in the range of 0 ° to 90 ° rotation angle by one side of the rotating mirror 136 and the rotation angle range of 180 ° to 270 ° by the opposite surface based on each synchronization signal. Since a vertical fire of up to 90 ° was monitored, extremely high accuracy was required for the positions and dimensions of the protrusions 152a and 152b formed at two locations on the mirror rotating plate 136, and the parts cost was high, and assembly adjustment was required. There was a problem that it took time and effort.

The present invention eliminates the need for the dimensional accuracy of the projection for outputting the synchronization signal provided on the mirror rotating disk, and can easily and easily adjust the monitoring direction of the detector and the warning area in the state of being installed in the monitoring area. It is an object of the present invention to provide a method for adjusting a scanning fire detector and a scanning fire detector.

  In order to achieve this object, the present invention is configured as follows. The present invention provides a method for adjusting a scanning fire detector.

That is, the present invention relates to a rotating mirror that rotates at a constant speed and optically vertically scans a monitoring area, and a light receiving signal at a timing when a predetermined idle rotation time T1 has elapsed from a synchronizing signal output for each rotation of the rotating mirror. And a fire detection processing section for ending the detection processing at a timing when a vertical scanning rotation time T2 for scanning a predetermined vertical scanning angle range is started. ,
Place an adjustment fire source at a known vertical scan angle in the monitored area,
The angle error Δα between the vertical scanning angle α obtained by detecting the adjustment fire source by monitoring scanning of the alert area and the known vertical scanning angle αo is obtained and converted into a rotation error time ΔT of the rotating mirror,
The idle rotation time T1 is corrected by the rotation error time ΔT so that the vertical scanning angle of the detector matches the vertical scanning angle of the monitoring area.

The present invention provides a scan that outputs a fire determination signal and a horizontal scan angle and a vertical scan angle indicating a fire source position when a fire source is detected from a light receiving signal received by optical horizontal scanning and vertical scanning in a monitoring area. Provide type fire detector. The scanning fire detector of the present invention is
A rotating mirror that rotates at a constant speed and vertically scans the surveillance area;
A synchronization signal output unit that outputs a synchronization signal for each rotation of the rotating mirror by a single protrusion provided on the rotating disk to which the rotating mirror is attached;
A fire detection process that starts detection processing of a received light signal at a timing when a predetermined idle rotation time T1 has elapsed from the synchronization signal, and ends detection processing at a timing when a vertical scanning rotation time T2 that scans a predetermined vertical scanning angle range has elapsed. And
In the adjustment mode setting state, a vertical scanning angle α obtained by detecting an adjustment fire source disposed at a position of a known vertical scanning angle αo in the monitoring area, and a known vertical scanning angle αo set from the outside An adjustment unit that obtains the angle error Δα of the rotation mirror and converts it into a rotation error time ΔT of the rotating mirror, corrects the idle rotation time T1 by the rotation error time ΔT, and matches the vertical scanning angle of the detector with the vertical scanning angle of the monitoring area; ,
It is provided with.

Here, the adjustment unit sets the adjustment mode according to an instruction from the central control panel and receives the setting of the known vertical scanning angle αo.

  According to the present invention, by generating the synchronization signal once per rotation of the rotating mirror, only one protrusion for generating the synchronizing signal provided on the rotating disk to which the rotating mirror is attached is required, and two protrusions are provided. High dimensional accuracy is not required, and the position accuracy when detecting a fire can be easily adjusted while installed in a warning area, so assembly is easy, reducing parts and manufacturing costs. be able to.

  When installed in the alert area, the vertical scan angle of the scanning fire detector from 0 ° to 90 ° is deviated from the 0 ° to 90 ° of the alert area, but at a known vertical scan angle position in the alert area. When the adjustment fire source is placed and the adjustment mode is set to the scanning fire detector from the central console of the central monitoring panel in this state, the monitoring scan for adjustment is performed, and the vertical detected for the adjustment fire source The scan angle is displayed.

Therefore, by looking at the detection scanning angle of the adjustment fire source, you can see the difference from the known vertical scan angle where the adjustment fire source is installed. When the scan angle is set, it is transferred to the scanning fire detector, and the adjustment process is automatically performed to automatically match the vertical scan angle of the detector with the vertical scan angle of the monitored area. can do.

  FIG. 1 is an explanatory view of a water gun system to which the present invention is applied. In FIG. 1, a facility such as a stadium or an exhibition hall is used as a warning area. In this example, four water guns 10 are installed, and a scanning fire detector 12 for monitoring the warning area corresponding to each water gun 10 is provided. Four are also installed. The scanning fire detector 12 is installed at a position overlooking the warning area, scans the warning area by optical horizontal and vertical scanning, and detects and outputs the fire source and its position due to the fire.

  The water spray gun 10 is mounted with a nozzle so as to be rotatable with respect to a gantry, and the elevation angle of the nozzle is fixedly installed with a predetermined angle. A water gun control panel 14 and a field operation panel 16 are provided for the water gun 10. A water distribution pipe 26 from a pump 22 is connected to the water discharge gun 10, and an air pipe 29 from an air compressor 28 is also connected. The pump 22 is controlled by a pump control panel 24.

  A central control panel 18 and a central console 20 are installed in the monitoring center. A scanning fire detector 12, a water cannon control panel 14, and a pump control panel 24 are connected to the central control panel 18. From the central console 20, an adjustment mode can be set for the operation type fire detector 12 to perform an adjustment operation.

  When a fire is detected by one of the scanning fire detectors 12, a fire determination signal and position information indicating the fire source position, specifically, a vertical scan angle and a horizontal scan angle indicating the fire source position are sent to the central control panel 18. The central control panel 18 calculates the three-dimensional position of the fire source with reference to a database prepared in advance, selects the water gun 10 closest to the fire source, and sets the water discharge distance to the fire source for the water gun 10. Notify and turn control.

  The activation of water discharge from the water gun 10 is automatically performed upon completion of pointing of the water gun 10 in the automatic mode, and is performed manually by the on-site operation panel 16 in the manual mode. When water for fire extinguishing is discharged from the water cannon 10, air supplied through the air pipe 29 is simultaneously injected around the water for fire extinguishing, and sufficient water discharge distance and water discharge range can be secured by mixing water and air. I am doing so.

  FIG. 2 is an explanatory diagram of a detection structure of a scanning fire sensor adjusted according to the present invention. In FIG. 2 (A), the scanning fire detector 12 has a horizontal scanning motor 32 installed in a housing 30 and a head 31 that is pivotably attached to the lower portion of the housing 30 has a horizontal scanning range of 190 °. 47 is reciprocatingly swiveled. The horizontal step scanning in the horizontal scanning range 47 is monitored with a resolution of 265 steps in units of 0.72 °.

  A vertical scanning motor 34 is provided in the housing 30 to rotate the rotating mirror 36 at a constant speed. By the rotation of the rotating mirror 36, a vertical scanning range 48 that is in a range of 0 ° to 90 ° is set. The vertical scanning range 48 is monitored with a resolution of 901 steps in units of 0.1 °. Further, since the rotating mirror 36 is a double-sided mirror, each scanning of the vertical scanning range 48 that is in the range of 0 ° to 90 ° with a horizontal step turning scanning of a predetermined angle between each rotation of the rotating mirror 36 is performed twice. Done.

  As shown in FIG. 2B, since the scanning fire detector 12 monitors the reflected light from the rotating mirror 36, the rotating mirror 36 rotates 45 ° to perform vertical scanning from 0 ° to 90 °. The range 48 can be monitored.

  The time of one rotation (360 °) of the rotary mirror 36 is 120 ms, for example, and fire monitoring is performed twice because it is a double-sided mirror at the time of one rotation. Accordingly, the time for which one surface of the rotating mirror 36 monitors the vertical scanning range 48 (0 ° to 90 °) is obtained by the following formula and is 15 ms.

360 ° / 45 ° = 8
120ms / 8 = 15ms
The vertical scanning range 48 is 0 ° to 90 °, and this range is divided into 901 steps in units of 0.1 °, so the rotation time per 0.1 ° is 15 ms / 901 = 16.67 μs.

  As shown in FIG. 2A, the light energy from the vertical scanning range 48 is transmitted from the reflection mirror 36 through the optical system including the objective lens 38, the reflection mirror 40, the slit 42, and the condenser lens 44. 46 is imaged. Here, when it is assumed that the rotating mirror 36 is stationary, the monitoring visual field 49 in the vertical scanning range 48 is determined by the size of the slit 42 and is, for example, 1 ° horizontal and 0.43 ° vertical.

  In the present invention, when such a scanning fire detector 12 is installed and adjusted in a warning area, the vertical scanning range 48 of 0 ° to 90 ° is adjusted to a known vertical scanning angle. The fire source 50 is arranged to perform monitoring scanning for adjustment.

  FIG. 3 is an explanatory diagram of the rotating mirror driving unit in FIG. In FIG. 3, the rotary mirror 36 mounted on the rotary shaft of the vertical scanning motor 34 uses a double-sided mirror, and the rotary mirror 36 is arranged in the diameter direction so as to pass through the central axis on the end face of the rotary disc 52. And is rotated at a constant rotational speed by the vertical scanning motor 34.

  The rotating mirror 36 is rotated once by a period of 120 ms by, for example, the vertical scanning motor 34, and is a double-sided mirror, so that the vertical scanning is performed twice in one rotation. In the present invention, the synchronization signal is output once by one rotation of the rotary mirror 36. For this reason, a protrusion 52a is provided at a predetermined position on the outer periphery of the rotary disc 52. For the protrusion 52a, a photo interrupter 54 is provided at a position corresponding to the rotation timing for outputting the synchronization signal.

  The photo interrupter 54 has a light emitting element and a light receiving element arranged on both sides through a gap through which the protrusion 52a passes, and outputs a detection signal when the light input to the light receiving element is interrupted each time the protrusion 52a passes. Based on this, a synchronization signal, which will be clarified in later explanation, is output once per rotation.

  In such a structure of the rotating mirror driving unit, the conventional accuracy in which the projections for generating the synchronization signal are provided at two locations around the rotating disk is not required, and it corresponds to the timing of generating the synchronization signal. It is only necessary that the protrusion 52 a sufficient to operate the photo interrupter 54 is formed around the rotating plate 52.

  FIG. 4 is an explanatory diagram of installation and monitoring scanning in the monitoring area in the scanning fire detector of the present invention. In FIG. 4, the scanning fire detector 12 of the present invention is installed at a position looking down obliquely from above the monitoring area 55. In the scanning fire detector 12, the 0 ° direction (vertical scanning start direction) 56 of the scanning fire detector coincides with the 0 ° direction in the monitoring area 48, and the 90 ° direction (vertical scanning in the scanning fire detector 12). Similarly, the end direction 58 needs to coincide with the 90 ° direction in the monitoring area 48.

  FIG. 5 is a block diagram of a circuit configuration of a scanning fire detector according to the present invention. In FIG. 5, the scanning fire detector of the present invention is provided with a horizontal scanning control unit 66 for the horizontal turning motor 32 and a vertical scanning control unit 68 for the vertical scanning motor 34.

  For the vertical scanning motor 34, as shown in the motor drive section of FIG. 3, a photo interrupter 54 for detecting the passage of the projection 52 provided on the rotating disk 52 is provided, and the output of the photo interrupter 54 is as follows. Based on the light reception signal from the photo interrupter 54, the synchronization signal output unit 62 outputs a synchronization signal once per rotation of the rotating mirror.

  The synchronization signal from the synchronization signal output unit 62 is supplied to the monitoring control unit 64, and based on the synchronization signal, the vertical scanning control unit 68 controls the vertical scanning motor 34, the horizontal scanning control unit 66 controls the horizontal turning motor 32, and Detection processing of a light reception signal obtained by optical scanning of the warning area is performed.

  The infrared detector 46 receives infrared energy incident by optical vertical scanning by a rotating mirror and outputs a detection signal. The detection signal is amplified by an amplifier 70, and then the waveform is shaped and noise cut by an analog signal processing unit 72. Are input to the monitoring control unit 64, sampled in units of 0.1 ° in the vertical scanning angle range of 0 ° to 90 ° by the AD converter provided therein, and detected data for 901 steps. It is converted and output to the arithmetic processing unit 74.

  The arithmetic processing unit 74 compares each detection data sampled at intervals of 0.1 ° with vertical scanning from 0 ° to 90 ° with a predetermined fire threshold, and determines that a fire has occurred when the fire threshold is exceeded. Then, the monitoring control unit 64 performs a scanning process for specifying the fire source.

  FIG. 6 is an explanatory diagram of a scanning process for determining a fire when a fire is detected by the monitoring scan of the scanning fire detector of the present invention.

  In FIG. 6, when a fire is first detected in the horizontal step of the scanning line 98 in the monitoring scan for the fire area 96 in the alert area, the process proceeds to the next monitoring step to determine whether or not the fire is continuous. Here, the processing step of the fire monitoring is performed in units of two horizontal steps, and two-step horizontal turning is performed for each vertical scanning.

  Since a fire is not detected when the scanning line 102 is reached by horizontal scanning with respect to the fire range 96, the scan is returned to the center step of the fire range, for example, the position of the scanning line 100, calculated from the number of steps where the fire has continued. The position of the scanning line 100 is the center position of the detected fire range 96.

  If the scanning position is returned to the center position of the fire range 96, the horizontal scanning is stopped at that position, and the vertical scanning is continuously performed, for example, 40 times, and the number of times the detected data exceeds the fire judgment value in this vertical scanning. If, for example, 20 times or more, a fire is determined and a fire determination signal is output. At the same time, information indicating the fire source position is output.

  FIG. 7 is a block diagram of a functional configuration of the monitoring control unit 64 of FIG. In FIG. 7, the monitoring control unit 64 is provided with a T1 register 76, a T2 register 78, a T3 register 80, a fire monitoring processing unit 82, an AD converter 84, a time adjusting unit 86, and registers 88 and 90.

  The T1 register 76 sets the idle rotation time T1 from the synchronization signal to the vertical 0 ° direction which is the vertical scanning start timing by the surface of the rotating mirror 36. The T2 register 80 sets an idle rotation time T2 from the synchronization signal to the vertical 0 ° direction which is the vertical scanning start timing by the back surface of the rotary mirror 36. The T3 register 76 sets a mirror rotation time T3 corresponding to a vertical scanning angle range of 0 ° to 90 °.

  The fire monitoring processing unit 82 performs the first fire monitoring processing by the mirror surface, horizontal step scanning, 2 by the mirror back surface based on the synchronization signal and the set times T1, T2, and T3 of the T1 register 76, T2 register 78, and T3 register 80. The second fire monitoring process and horizontal step scanning are processed.

  FIG. 8 is a time chart of the process synchronized with the mirror rotation of the fire monitoring processing unit 82 of FIG. FIG. 8 shows a synchronization signal, which is obtained once per mirror rotation, and the period T0 of the synchronization signal is 120 ms, which is the time for one rotation of the mirror.

  T3 is a fire monitoring timing, and the time when the idle rotation time T1 has elapsed from the rising edge of the synchronization signal is set as the vertical scanning start timing in the vertical 0 ° direction, and the mirror 0 ° to 45 ° (vertical scanning range 0 ° to 90 °). The detection data is obtained by performing AD conversion using a sample clock having a period of 16.67 μs which is a rotation time of 0.1 ° with respect to the detection signal of the infrared detection element 46 over the vertical scanning rotation time T3 determined by the rotation time of Convert to and judge the fire.

  A vacant time is provided following the vertical scanning rotation time T3 in the vertical scanning range 0 ° to 90 ° by the mirror surface, horizontal step scanning is performed during the vacant time, and then at the second vertical scanning rotation time T3 by the mirror back surface. The AD signal is converted to detection data by using a sample clock having a period of 16.67 μs, which is a rotation time of 0.1 °, with respect to the detection signal of the infrared detection element 46, and a fire is judged.

  Referring again to FIG. 7, the time adjustment unit 86 operates in accordance with an operation instruction from the central console 20 of the central control panel 18 shown in FIG. 1 to set an adjustment mode, and the 0 ° of the scanning fire detector 12 is set. An adjustment process for matching the vertical scanning angle of ˜90 ° with the vertical scanning angle of 0 ° to 90 ° of the warning area is executed.

  In this adjustment process, an adjustment fire source is installed at a position of a known vertical scanning angle αo in the warning area, and the adjustment fire source is detected by performing a monitoring scan in the adjustment mode setting, and the vertical scanning angle of the detected fire source is detected. α is displayed on the display of the central console 20.

  At this time, since the vertical scanning angle αo of the adjustment fire source is known, the presence / absence of an error can be readily known by looking at the displayed detected vertical scanning angle α. If there is an error, the value of the vertical scanning angle αo of the known adjustment fire source is set by the central console 20 and transferred to the scanning fire detector 12.

  The scanning fire detector 12 holds the vertical scanning angles α1 and α2 of the adjustment fire source detected by the monitoring scan in the register 88 of the monitoring control unit 64 of FIG. Α1 is a vertical scanning range on the mirror surface, and α2 is a vertical scanning range on the mirror back surface. A known vertical scanning angle for the adjustment fire source transferred from the central console 20 is held in the register 90 as a calibration vertical scanning angle αo.

Here, when the mirror surface is used, the time adjustment unit 86 reads the values of the registers 88 and 90 and calculates the angle error Δα1 of the vertical scanning angle by the following equation.
(Angle error Δα1) = (calibration vertical scanning angle αo) − (detected vertical scanning angle α1)
Subsequently, the angle error Δα is converted into the rotation time of the mirror by the following equation to obtain the rotation error time ΔT.
(Rotation error time ΔT) = 16.67 μs × (angle error Δα1) /0.1°
When the rotation error time ΔT1 is calculated in this way, the idle rotation time T1 of the T1 register 76 is read and T1 = T1 + ΔT1.
The corrected idle rotation time T1 is set in the T1 register 76, and the adjustment is completed. The same process is performed on the rear surface of the mirror to set T2.

  By adjusting the idle rotation times T1 and T2 as described above, the vertical 0 ° direction of the scanning fire detector 12 and the monitoring viewing area at the start timing of the fire monitoring vertical scan when T1 or T2 time has elapsed from the synchronization signal of FIG. The vertical 0 ° direction completely coincides, and the fire source position can be accurately detected.

  FIG. 9 is an explanatory diagram of a method for adjusting a scanning fire detector according to the present invention. FIG. 9A is an explanatory diagram of the vertical scanning range of the scanning fire detector 12 before adjustment, and the angular error Δα in the 0 ° direction 56 of the scanning fire detector 12 with respect to the monitoring area 0 ° direction 90. (Δα1 or Δα2).

  In order to adjust the scanning fire detector 12 as described above, the adjusting fire source 50 is installed at a position where, for example, the known vertical scanning angle is 45 ° when viewed from the scanning fire detector 12 in the alert area. When the adjustment fire source 50 is installed, as shown in FIG. 7, when the adjustment mode is set in the adjustment unit 86 and the monitoring operation is performed, the adjustment process is automatically executed.

In this case, assuming that the vertical scanning angle α when the adjustment fire source 50 is detected by vertical scanning of the scanning fire detector 12 is α1 = 45.2 ° and α2 = 45.1 °, the central console 20 From the calibrated vertical scanning angle αo = 45 °, the angle errors Δα1 and Δα2 are Δα = 45 ° −45.2 ° = −0.2 °.
This is converted into a rotation error time ΔT to correct the idle rotation times T1 and T2. As a result, after adjustment, as shown in FIG. 9B, the monitoring area 0 ° direction 90 and the 0 ° direction 56 of the scanning fire detector 12 coincide. Of course, the 90 ° direction 92 of the monitoring area and the 90 ° direction 58 of the scanning fire detector 12 also coincide.

  FIG. 10 is a flowchart of the vertical scanning process by the fire monitoring processing unit 82 of FIG. 10, first, in step S1, idle rotation times T1 and T2 are fetched from the T1 register 76 and T2 register 78, and the time (T1) for determining the timing of the rotation time of 0 ° to 90 ° by the mirror surface in FIG. T1 + T3), (T2), and (T2 + T3) are set.

  When the synchronization signal is determined in step S2, the timer is reset and started in step S3, and the arrival at the idle rotation time T1 is monitored in step S4. When the idle rotation time T1 has elapsed, the process proceeds to step S5, and a fire monitoring vertical scan is performed at the first vertical scanning angle of 0 ° to 90 ° by the mirror surface.

  During the vertical scanning of the fire monitoring, it is determined in step S6 that the set time (T1 + T3) of the monitoring range 90 ° has been reached, and when the set time (T1 + T3) has elapsed, the process proceeds to step S7.

  Subsequently, in step S7, it is determined whether the set time (T2) has reached the monitoring range 0 ° depending on whether the mirror is on the back side of the mirror. When the set time (T2) has elapsed, the process proceeds to step S8 and the second vertical scanning angle on the mirror back side. Perform a vertical scan for fire monitoring from 0 ° to 90 °.

  During the fire monitoring vertical scan, it is determined in step S9 that the set time (T2 + T3) has been reached. When the set time (T2 + T3) has elapsed, the process returns to step S2 and waits for the next synchronization signal.

  Although omitted in the flowchart, the horizontal turning motor 32 is turned horizontally stepwise, that is, 0.72 ° horizontally, in the idle time after the end of the fire monitoring range 90 °.

  FIG. 11 is a flowchart of idle time adjustment processing by the time adjustment unit 86 of FIG. The adjustment of the scanning fire detector of the present invention is performed by adjusting the menu on the display screen of the central control console 20 of the central control panel 18 in FIG. 1 with the adjustment fire source installed at the position of the known vertical scanning angle αo in the alert area. When the detector adjustment is selected and activated, an adjustment command is transmitted to the scanning fire detector to be adjusted.

  For this reason, if it is determined in step S1 in FIG. 11 that the adjustment command has been received, the adjustment mode is set in step S2, and monitoring scanning is started in step S3. As shown in FIG. 6, by this monitoring scan, a fire source detection process is performed with the adjustment fire source as the fire range 96, and when a fire is determined in step S4, a fire determination signal and a horizontal scanning angle θ indicating the fire source position are displayed. , Vertical scanning angles α1 and α2 by the mirror front and back surfaces are output.

  The vertical scanning angle α of the fire source is transferred to the central control panel 18 in step S5, and the detected vertical scanning angle angles α1 and α2 are displayed on the display of the scanning table 20. For this reason, a difference from the known vertical scanning angle αo where the adjustment fire source is arranged is seen from the central console 20, and the vertical scan angle of the adjustment fire source is set as the calibration vertical scanning angle αo from the central console 20 for adjustment. Set and transfer to scanning fire detector.

  When the scanning fire detector 12 determines in step S6 that it has received the calibration vertical scanning angle αo of the adjustment fire source, it calculates angular errors Δα1 and Δα2 of the detected vertical scanning angle in step S7, and calculates the rotation error Δα in step S8. The rotation error times ΔT1 and ΔT2 expressed as motor rotation times are converted, the idle rotation times T1 and T2 are corrected in step S9, and the adjustment mode is canceled in step S10.

  As an installation direction in the horizontal scanning range of the adjustment fire source when adjusting the scanning fire detector 12, for example, it is desirable to install it in the front direction of the monitoring area when viewed from the scanning fire detector 12.

  Further, as seen from the scanning fire detector 12, the adjustment fire source is installed not only at one place in the horizontal scanning range but at two places having a known vertical scanning angle, for example, and the two monitoring fire sources are similarly monitored. A rotation time error may be obtained for each of the two adjustment fire sources by scanning, and the idle rotation times T1 and T2 may be corrected based on the average error to improve the correction system.

  The idle rotation time T1 detected by the adjustment of the scanning fire detector 12 is also registered and stored in the database of the central control panel 18, and is corrected idle rotation time held in the scanning fire detector due to a failure or the like. When T1 and T2 are lost, it is possible to obtain them from the database so that the adjustment process does not have to be performed again.

The present invention includes appropriate modifications that do not impair the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

Explanatory drawing of a water cannon system to which the present invention is applied Explanatory drawing of the detection structure of a scanning fire detector adjusted according to the present invention Explanatory drawing of the rotating mirror drive part of FIG. Explanatory drawing of installation and monitoring scan for the monitoring area of the scanning fire detector Block diagram of circuit configuration of scanning fire detector according to the present invention Explanatory drawing of the scanning process for the fire determination in the scanning fire detector of the present invention Block diagram of the functional configuration of the monitoring control unit of FIG. Time chart of fire monitoring and horizontal turning for synchronization signal in the scanning fire detector of the present invention Explanatory drawing of the adjustment method of the scanning fire detector according to the present invention performed by arranging the adjustment fire source in the warning area Flowchart of vertical scanning processing by the fire monitoring processing unit of FIG. Flowchart of idle rotation time adjustment processing by the time adjustment unit of FIG. Explanatory drawing of rotating mirror drive part in conventional scanning fire detector

Explanation of symbols

10: Water spray gun 11: Electric valve 12: Fire detector 13: Remote open / close valve 14: Water discharge control panel 16: Site control panel 18: Central control panel 20: Central control console 22: Pump 24: Pump control panel 26: Water pipe 28: Air compressor 29: Air piping 30: Housing 32: Horizontal scanning motor
34: Vertical scanning motor 36: Rotating mirror
38: Objective lens 40: Reflecting mirror 42: Slit 44: Condensing lens 46: Infrared detector 48: Vertical scanning range 50: Adjustable fire source 52: Rotating disk 52a: Protrusion 54: Photo interrupter 55: Monitoring area 56: 0 ° direction 58: 90 ° direction 60: synchronization signal generation timing 62: synchronization signal output unit 64: monitoring control unit 66: horizontal scanning control unit 68: vertical scanning control unit 70: amplifier 72: analog signal processing unit 74: arithmetic processing Part 76: T1 register
78: T2 register
80: T3 register
82: Fire monitoring processor
84: AD converter 86: Time adjustment unit 90: Monitoring zone 0 ° direction 92: Monitoring zone 90 ° direction

Claims (3)

A rotation mirror that rotates at a constant speed and optically vertically scans the monitoring area, and a detection process of the light reception signal at a timing when a predetermined idle rotation time has elapsed from a synchronization signal output for each rotation of the rotation mirror. In a method for adjusting a scanning fire detector comprising: a fire detection processing unit that starts and ends a detection process at a timing when a vertical scanning rotation time for scanning a predetermined vertical scanning angle range has elapsed;
Place an adjustment fire source at a known vertical scan angle in the monitored area,
Obtaining an angular error between the vertical scanning angle obtained by detection of the adjustment fire source by monitoring scanning of a warning area and the known vertical scanning angle, and converting it into a rotational error time of the rotating mirror;
A method for adjusting a scanning fire detector, wherein the idle rotation time is corrected by the rotation error time so that the vertical scanning angle of the detector coincides with the vertical scanning angle of the monitoring area.
A scanning fire detector that outputs a fire determination signal and a horizontal scanning angle and a vertical scanning angle indicating a fire source position when a fire source is detected from a light receiving signal received by optical horizontal scanning and vertical scanning in a monitoring area. In
A rotating mirror that rotates at a constant speed and vertically scans the surveillance area;
A synchronization signal output unit that outputs a synchronization signal for each rotation of the rotating mirror by a single protrusion provided on a rotating disk to which the rotating mirror is attached;
Fire detection processing that starts detection processing of the light reception signal at a timing when a predetermined idle rotation time has elapsed from the synchronization signal, and ends detection processing at a timing when a vertical scanning rotation time for scanning a predetermined vertical scanning angle range has elapsed And
In the adjustment mode setting state, the angle between the vertical scanning angle obtained by detecting the adjustment fire source arranged at the position of the known vertical scanning angle in the monitoring area and the known vertical scanning angle set from the outside An error is obtained and converted into a rotation error time of the rotating mirror, and an adjustment unit that corrects the idle rotation time by the rotation error time to match the vertical scanning angle of the detector with the vertical scanning angle of the monitoring area;
A scanning fire detector characterized by comprising:

  3. The scanning type fire detector according to claim 2, wherein the adjustment unit sets an adjustment mode and receives the setting of the known vertical scanning angle in response to an instruction from a central control panel. Adjustment method.

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