JP2006223440A - Water pressure control device, method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably control the water pressure even if the length of piping between a water spray gun and a motor-operated valve. <P>SOLUTION: A continuous control processing part 40 detects a pressure deviation ΔP between the detected pressure P of a pressure sensor 30 and a target pressure Po set according to the water spray distance to a fire source position, and continuously controls the opening of the motor-operate valve 11 with control signals to eliminate the pressure deviation in the range in which the pressure deviation ΔP exceeds a prescribed value. An intermittent control processing part 42 controls the opening of the motor-operated valve 11 with intermittent control signals which have an on-period, an off-period and an interval period determined according to the pressure deviation to eliminate the pressure deviation if the pressure deviation ΔP is within the prescribed range. Setting of the interval period of the intermittent control signals can be changed by an interval period adjusting part 52 if necessary. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a water discharge pressure control device, method, and program for a water discharge gun system that detects fire in a warning area with a scanning fire detector and discharges water for fire extinguishing.

  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 by the energy of the fire flame, and calculates the fire source position to be controlled The water spray gun is directed to the fire source position by horizontal turning, and the water for fire extinguishing is sprinkled by controlling the water discharge pressure according to the distance to the fire source.

  The water discharge pressure control of the water discharge gun detects the water discharge pressure of the water discharge gun with a pressure sensor, and pressurizes the water discharge gun so that the deviation from the target water discharge pressure set based on the distance to the fire source is zero. Feedback control is performed on the opening degree of the motor-operated valve provided in the pipe for supplying fire-fighting water.

Further, in the conventional water discharge pressure control, when the pressure deviation has converged to the specified range by feedback control of the opening degree of the motorized valve, the continuous control is switched from the previous control to the intermittent control, and the water discharge is stably performed. The pressure is controlled to the target water discharge pressure. In this intermittent water discharge pressure control, the opening of the motorized valve is controlled by repeatedly outputting an intermittent control signal having an on period and an off period, and the on period and the off period of the intermittent control signal are proportional to the pressure deviation. To change.

Japanese Patent Publication No. 5-21588 JP 2004-248934 A JP 2004-261478 A

  However, in such conventional water discharge pressure control, the piping distance between the water discharge gun and the motorized valve differs depending on the equipment, and the water discharge pressure is detected by the pressure sensor provided in the water discharge gun in such an installation environment. When the motorized valve is controlled, there is a slight time difference depending on the piping distance between the detected pressure detected by the pressure sensor that actually discharges water from the water discharge gun after changing the opening of the motorized valve. Depending on the distance, the pressure deviation between the target pressure and the detected pressure hunts without converging to zero, the opening degree of the motorized valve becomes unstable, and there is a possibility that it becomes difficult to control the stable water discharge pressure.

An object of the present invention is to provide a water discharge pressure control device, a method, and a program that enable stable water discharge pressure control even when the piping distance between the water discharge gun and the electric valve is different.

  In order to achieve this object, the present invention is configured as follows. The present invention provides a water discharge pressure control device. The water discharge pressure control device of the present invention includes a water discharge gun that sprays fire-extinguishing water toward a fire source position in a warning area, an electric valve provided in a pipe that supplies pressurized fire-extinguishing water to the water discharge gun, and water discharge of the water discharge gun Detects the pressure deviation between the pressure sensor that detects the pressure and the pressure detected by the pressure sensor and the target pressure set according to the water discharge distance to the fire source position, and eliminates the pressure deviation when the pressure deviation exceeds the specified range. As described above, the opening degree of the motor-operated valve is continuously controlled by the control signal, and the motor is electrically operated by the intermittent control signal having the on period, the off period, and the interval period determined according to the pressure deviation so that the pressure deviation is eliminated when the pressure deviation is within the predetermined range. A control unit for controlling the opening of the valve and an adjustment unit for setting and changing the interval period of the intermittent control signal are provided.

  Here, the control unit changes the on period, the off period, and the interval period of the intermittent control signal in proportion to the pressure deviation. In addition, the control unit sets a coefficient that changes according to the pressure deviation within a predetermined range, and multiplies the on period, the off period, and the interval period in which the coefficient is fixedly set to multiply the on period, the off period, and the pressure deviation. Determine the interval period.

  The control unit sets the maximum value of the coefficient corresponding to the pressure deviation that gives a threshold for determining the predetermined range, sets the minimum value of the coefficient corresponding to zero pressure deviation, and sets the pressure between the maximum value and the minimum value. The coefficient is changed according to the deviation.

The present invention provides a water discharge pressure control method for a water discharge gun apparatus. The present invention relates to a water discharge gun that sprays fire-extinguishing water toward a fire source position in a warning area, an electric valve provided in a pipe that supplies pressurized fire-extinguishing water to the water discharge gun, and a pressure that detects the water discharge pressure of the water discharge gun. In a water discharge pressure control method of a water discharge gun system equipped with a sensor,
A deviation detecting step for detecting a pressure deviation between a detected pressure of a pressure sensor and a target pressure set according to a water discharge distance to the fire source position;
In a range where the pressure deviation exceeds a predetermined range, a continuous control step for continuously controlling the opening of the motor-operated valve with a control signal so as to eliminate the pressure deviation;
When the pressure deviation is within a predetermined range, an intermittent control step for controlling the opening degree of the motorized valve by an intermittent control signal having an on period, an off period, and an interval period determined according to the pressure deviation so as to eliminate the pressure deviation;
An adjustment step for setting and changing the interval period of the intermittent control signal as necessary;
It is provided with.

The present invention provides a program executed by a computer of a water gun control panel. The program according to the present invention detects a water discharge gun that sprays water for extinguishing water toward a fire source position in a warning area, a motorized valve provided in a pipe that supplies pressurized water for fire extinguishing, and a water discharge pressure of the water discharge gun. In the computer of the control panel of the water gun system equipped with a pressure sensor
A deviation detecting step for detecting a pressure deviation between a detected pressure of the pressure sensor and a target pressure set according to a water discharge distance to the fire source position;
In a range where the pressure deviation exceeds a predetermined range, a continuous control step for continuously controlling the opening of the motor-operated valve with a control signal so as to eliminate the pressure deviation;
When the pressure deviation is within the predetermined range, an intermittent control step of controlling the opening degree of the electric valve by an intermittent control signal having an on period, an off period, and an interval period determined according to the pressure deviation so as to eliminate the pressure deviation;
An adjustment step for changing the interval period of the intermittent control signal as necessary;
Is executed.

The details of the discharge pressure control method and program of the present invention are basically the same as the discharge pressure control apparatus of the present invention.

  According to the present invention, for intermittent control of a motor-operated valve that is performed when the pressure deviation converges within a specified range, an interval period that functions as a waiting time following an off period for an intermittent control signal having an on period and an off period In addition to the off period, an interval period was added even if the water discharge pressure of the water gun changed with a time delay depending on the piping distance in the opening control of the motorized valve during the on period. In the meantime, the pressure change of the water discharge gun settles to the value after control, and by shifting to the next intermittent control after stabilization, hunting without converging to the target pressure is reliably prevented, and the water discharge pressure is set to the target. The pressure can be reliably stabilized.

In addition, since the interval period of the intermittent control signal is adjustable, even if the piping distance between the water gun and the motorized valve is different between the design stage and the field stage, the parameters of the control program are returned to the design level and corrected. Stable water discharge pressure control can be realized by adjusting the interval period as needed at the site without requiring a cumbersome technique such as.

  FIG. 1 is an explanatory view of a water gun system to which the present invention is applied. The water cannon system shown in FIG. 1 is installed in a facility such as a stadium or an exhibition hall. For example, four water cannons 10 are installed in a predetermined alert area in this example. Corresponding to the water cannon 10, for example, four fire detectors 12 for monitoring the alert area are installed. The fire detector 12 detects a fire source by optical horizontal and vertical scanning with respect to a warning area, and outputs a horizontal scanning angle and a vertical scanning angle indicating a fire source position together with a fire determination signal.

  A drain pipe 26 from a pump 22 installed in the pump chamber is connected to the water discharge gun 10. The pump 22 is controlled by a pump control panel 24. An air pipe 29 is connected from an air compressor 28 installed in the pump chamber. The water distribution pipe 26 for the water discharge gun 10 is provided with an electric valve 11. A remote opening / closing valve 13 is provided on the primary side of the motor-operated valve 11.

  For each of the water cannons 10, a water cannon control panel 14 and an on-site operation panel 16 are provided, and a central control panel 18 and a central control console 20 are provided at the central monitoring center. The pressure sensors that will be clarified in the following explanation provided in the motor operated valve 11, the remote on-off valve 13, and the water cannon 10 are connected to the water gun control panel 14 that is installed correspondingly. The water discharge pressure from the water discharge gun 10 is controlled to be the target water discharge pressure corresponding to the water discharge distance to the fire source by the opening / closing control of the electric valve 11 by the provided water discharge pressure control unit.

  Pressurized air from the air pipe 29 is injected around the water for fire extinguishing when the water for fire extinguishing is discharged from the water cannon 10, and sufficient water can be discharged with a low water discharge pressure and a small water discharge amount by mixing the air and water. The distance and wide watering range can be secured. The water discharge gun 10 can be turned horizontally by a motor drive with respect to the gantry, and is fixedly set at a predetermined water discharge angle in the vertical direction.

  The fire determination signal for the fire source detected by the fire detector 12 and the horizontal scanning angle and the vertical scanning angle indicating the fire source position are sent to the central monitoring panel 18 to obtain the three-dimensional coordinate position of the fire source in the alert area. Further, the water gun 10 that performs water discharge control on the fire source is selected, the distance between the selected water gun 10 and the fire source is obtained, and the target water discharge pressure corresponding to this distance is selected. Is sent to the water cannon control panel 14 and used for water discharge control.

  FIG. 2 is a block diagram of the functional configuration of the water discharge pressure control apparatus according to the present invention. In FIG. 2, the water discharge pressure control device 15 is provided in the water discharge gun control panel 14 of FIG. 1, and a computer is used as hardware constituting the device. A pressure sensor 30 is installed in the water discharge gun 10 to be controlled by the water discharge pressure control device 15, and the water discharge pressure supplied from the water supply pipe 26 is detected and input to the water discharge pressure control device 15.

  The water discharge pressure control device 15 includes a water discharge pressure sampling unit 32, a target water discharge pressure setting unit 34, a pressure deviation calculation unit 36, a deviation comparison unit 38, a continuous control processing unit 40, and an intermittent control processing unit 42. Further, the intermittent control processing unit 42 is provided with a coefficient setting unit 44, an intermittent control period calculation unit 46, an intermittent control signal output unit 48, an intermittent control period table 50, and an interval period adjustment unit 52. Further, a deviation range adjustment unit 54 is provided for the deviation comparison unit 38.

  The water discharge pressure sampling unit 32 provided in the water discharge pressure control device 15 samples a pressure detection signal from the pressure sensor 30 provided in the water discharge gun 10, converts it into a detection pressure P as digital data, and outputs it. The target water discharge pressure setting unit 34 sets a target water discharge pressure Po according to the distance from the central control panel 18 to the fire source that discharges water with the water discharge gun 10.

  The pressure deviation calculation unit 36 is a pressure deviation ΔP (= Po−P) between the target water discharge pressure Po output from the target water discharge pressure setting unit 34 and the detected pressure P of the pressure sensor 30 output from the water discharge pressure sampling unit 32. Is calculated and output.

  The deviation comparison unit 38 compares the value of the pressure deviation ΔP output from the pressure deviation calculation unit 36 with a predetermined threshold value ± Pth, and sets the continuous control mode when the pressure deviation ΔP exceeds the threshold value ± Pth. Then, the control processing by the continuous control processing unit 40 is validated. On the other hand, when the pressure deviation is within the threshold value ± Pth, the intermittent control mode is set and the control processing of the intermittent control processing unit 42 is validated.

  The continuous control processing unit 40 controls the opening degree of the motor-operated valve 11 by outputting a control signal so that the pressure deviation ΔP output from the pressure deviation calculating unit 36 becomes zero. That is, if the pressure deviation ΔP is positive, the motorized valve 11 is controlled in the closing direction to reduce the pressure, while if the pressure deviation ΔP is negative, the motorized valve 11 is controlled in the opening direction to increase the water discharge pressure. The pressure P detected by the pressure sensor 30 of the water discharge gun 10 is directed to the target water discharge pressure Po.

  The intermittent control processing unit 42 operates when the pressure deviation ΔP converges within a predetermined threshold value ± Pth by the feedback control by the continuous control processing unit 40, and the opening degree of the motor-operated valve 11 is intermittently set. Thus, feedback control is performed so that the pressure deviation ΔP becomes zero.

  FIG. 3 is an explanatory diagram of the timing of the intermittent control signal generated by the intermittent control processing unit 42 of FIG. FIG. 3 shows a single intermittent control signal. First, the ON period Ton, the OFF period Toff, and the interval period Tint are calculated over the period of the intermittent control calculation timing Tc based on the pressure deviation ΔP at that time. ing.

  Following the intermittent control calculation timing Tc, according to the period (time) obtained as the calculation result, during the ON period Ton, if the pressure deviation is positive, a pulse-like control signal for closing the motor-operated valve 11 is output, If the pressure deviation at that time is negative, a pulse signal for opening the motor-operated valve 11 is output.

  Subsequently, the output of the control signal of the motor-operated valve 11 is stopped during the off period Toff having the same time as the on period Ton. Further, in the present invention, the output of the control signal is also stopped during the interval period Tint after the off period Toff has elapsed. Therefore, after the control signal for opening or closing the motor-operated valve 11 in the ON period Ton is output in a pulse manner, the control of the motor-operated valve 11 is stopped for a period obtained by adding the interval period Tint to the OFF period Toff. become.

  As a result, the change in the discharge pressure due to the valve opening by the open control signal or the close control signal of the motor-operated valve 11 over the ON period Ton depends on the opening during the control stop period including the OFF period Toff and the interval period Tint. Therefore, the process is settled, and the process shifts to the process based on the intermittent control calculation timing for outputting the next intermittent control signal in the stabilized state.

  FIG. 4 is a time chart of a discharge pressure control signal output from the discharge pressure control device 15 of FIG. 2 when the detected pressure P of the pressure sensor 30 is increased at a constant rate with respect to the time axis.

  FIG. 4 (A) shows the control characteristics of the discharge water pressure control device 15. The deviation comparison unit 38 sets the continuous control areas A1 and A2 outside the predetermined deviation ± Pth for the pressure deviation ΔP = 0, Intermittent control areas B1 and B2 are set inside.

  Here, as shown in FIG. 4A, in order to change the pressure deviation ΔP linearly with respect to the time axis, for example, the target water discharge pressure Po for the target water discharge pressure setting unit 34 in FIG. Thus, the detected pressure P from the pressure sensor 30 may be increased linearly with respect to the time axis. Of course, this process is performed as a simulation.

  With respect to the change of the pressure deviation ΔP as shown in FIG. 4A, in the continuous control region A1 where the pressure deviation ΔP is smaller than the threshold value −Pth, the continuous control processing unit 40 of FIG. ) Discharge water pressure control signal continuously outputs a positive voltage for controlling the motor-operated valve 11 to open.

  When the pressure deviation ΔP exceeds the threshold −Pth, the intermittent control signal B1 is entered, the intermittent control processing unit 42 of FIG. 2 operates, and the intermittent control signal has an ON period and an OFF period proportional to the magnitude of the pressure deviation −ΔP. Is output. In the intermittent control signal in FIG. 4B, the interval period Pint in FIG. In the water discharge control signal having the on period and the off period output in the intermittent opening control region B1, the interval between the on period and the off period is proportionally shortened as the pressure deviation −ΔP decreases.

  When the pressure deviation ΔP exceeds ΔP = 0, the operation shifts to the intermittent closing control region B2, and the water discharge control signal in FIG. 4 (B) is switched to a negative voltage for closing the motor-operated valve 11, and the pressure deviation ΔP at this time is changed. An intermittent control signal having an on period and an off period corresponding to the magnitude is repeatedly output. In this case, since the pressure deviation ΔP increases with time, the period of the intermittent control signal having the on period and the off period is sequentially increased with respect to the change of the time axis.

  Further, when the pressure deviation ΔP exceeds the threshold value + Pth, the continuous control area A2 is entered and the continuous control processing unit 40 of FIG. 2 operates to control the motor operated valve 11 in the closing direction. It will output continuously.

  FIG. 5 is an explanatory diagram showing a relationship between a coefficient and a pressure deviation used for calculation of each section of the intermittent control signal shown in FIG. 3 in the intermittent control processing unit 42 of FIG.

  In FIG. 5A, the horizontal axis indicates the pressure deviation ΔP, and the vertical axis indicates the coefficient K that varies in the range of 0 to 1.0. In the intermittent control, since the absolute value of the pressure deviation ΔP is in the range of 0 to Pth, the characteristic 60 of the coefficient K that linearly increases with respect to the change of the pressure deviation ΔP is set in this range. Here, when the pressure deviation ΔP is the threshold value Pth, the coefficient K has a maximum value of K = 1.0. On the other hand, the pressure deviation ΔP = 0 has a minimum value of, for example, K = 0.1. The straight line 60 has a characteristic of a straight line connecting the minimum value K = 0.1 and the maximum value K = 1.0.

  In the actual apparatus, the relationship between the pressure deviation ΔP and the coefficient K based on the characteristic line 60 in FIG. 5A is prepared as table data having a coefficient K value with respect to a change in the pressure deviation at a constant interval. The coefficient corresponding to the pressure deviation is read and used.

  Here, in the intermittent control processing unit 42 of FIG. 2, values of the on period Ton, the off period Toff, and the interval period Tint in the intermittent control signal shown in FIG. 3 when the coefficient K = 1 is set in the intermittent control period table 50. Is fixedly set.

  Therefore, in the intermittent control period calculation unit 46, the coefficient K is obtained from the pressure deviation ΔP input by the coefficient setting unit 44 with reference to, for example, a table created based on the characteristic line 60 in FIG. The coefficient K is multiplied by the on period Ton, the off period Toff, and the interval period Tint fixedly set in the intermittent control period table 50 in the intermittent control period calculation unit 46, and the calculation result (KTon) (KToff) (KTint) is obtained. The intermittent control signal output unit 48 outputs the intermittent control signals of the on period, the off period, and the interval period having the calculated period to the motor operated valve 11 based on the calculation result.

  Further, in the embodiment of FIG. 2, the interval period adjusting unit 52 can adjust and change the size of the interval period Tint fixedly set in the intermittent control period table 50 as necessary. The adjustment of the interval period Tint by the interval period adjusting unit 52 can be arbitrarily adjusted as necessary by the person in charge using the operation unit provided in the water gun control panel 14 of FIG.

  For example, the on period Ton and the off period Toff when K = 1 in FIG. 3 are respectively Ton = Toff = 3 seconds, while the interval period Tint can be arbitrarily changed within a range of 0 to 10 seconds, for example. .

  If the interval period Tint can be freely adjusted, the relationship between the designed motor-operated valve 11 and the water discharge gun 10 cannot be related to the pipe distance, so a standard interval period corresponding to the designed pipe distance is determined. In response to this, when three time intervals, a short time interval and a long time interval, are set and hunting occurs in the standard interval time, the adjustment is made by switching to one of the time intervals. It may be.

  FIG. 5B is a characteristic diagram when the threshold value of the pressure deviation for switching between continuous control and intermittent control can be switched by the deviation range adjustment unit 54 provided in the water discharge pressure control device 15 of FIG. In FIG. 5 (B), the threshold for the pressure deviation ΔP can be switched to three levels Pth1, Pth2, and Pth3, and the coefficient K at each threshold is K = 1.0, and the pressure deviation ΔP = 0. The three characteristic lines 60-1, 60-2, 60-3 connected to the coefficient value K = 0.1 at the time are provided, and any one of these characteristics can be selected.

  By switching the characteristics shown in FIG. 5B, that is, the pressure deviation range for switching between the continuous control range and the intermittent control range, the width of the intermittent control range is narrowed or widened. Corresponding adjustments such as prevention of hunting due to the piping distance between them are possible. This is performed when the adjustment by the interval period according to the present invention cannot cope.

  FIG. 6 is a flowchart of the control process by the water discharge pressure control device 15 of FIG. In FIG. 6, in the water discharge pressure control process, after setting the target water discharge pressure Po corresponding to the target distance between the water discharge gun selected in step S1 and the fire source, the presence or absence of a water discharge start instruction is checked in step S2. When there is a water discharge start instruction, the remote on-off valve 13 provided in the water distribution pipe 26 of the selected water discharge gun 10 shown in FIG. 1 is controlled to open, and at the same time, water for fire extinguishing is added by the operation of the pump 22 by the pump control panel 24. The pressurized fire-extinguishing water is supplied to the motor-operated valve 11 through the remote open / close valve 13 that is controlled to open, and discharged from the water gun 10.

  When the water discharge start instruction is determined in step S2, the process proceeds to step S3, and after detecting the water discharge pressure P detected by the pressure sensor 30, the pressure deviation ΔP is calculated in step S4. In step S5, it is checked whether the pressure deviation is within a threshold value ± Pth. If it is off, the process proceeds to step S6, the continuous control mode is set, and the opening degree of the motor-operated valve is feedback-controlled according to the pressure deviation ΔP in step S7. And after checking the water discharge stop instruction | indication in step S12, if there is no water discharge stop instruction | indication, it will return to step S3 and will repeat a process.

  If the pressure deviation falls within the range of the threshold value ± Pth in step S5 during the process of setting the continuous control mode in step S6, the process proceeds to step S8 and the intermittent control mode is set. In the intermittent control mode, after determining the coefficient K corresponding to the pressure deviation ΔP in step S9, in step S10, the coefficient K determined in step S9 to the fixed on time Ton, off time Toff and interval time Tint. Performs multiplication.

  In step S11, the motor control valve 11 outputs a closed control signal if the deviation at that time is positive and a control signal that becomes an open control signal if the deviation is negative. And the output of the control signal is stopped for the interval period. In the intermittent control mode, steps S8 to S11, S12, and S3 to S5 are repeated.

  By controlling the water discharge pressure in the intermittent control mode, the water discharge pressure of the water discharge gun is stably controlled to the target pressure, and the fire-extinguishing water can be accurately sprayed to the detected fire source. If there is a water discharge stop instruction in step S12 during the water discharge control in the intermittent control mode, the series of processing ends.

  The present invention also provides a water discharge pressure control program executed by a computer provided in the water discharge gun control panel 14 of FIG. 1, and this program has the contents of the water discharge pressure control process shown in FIG. The hardware resources of the computer that executes the water discharge pressure control program of the present invention provided in the water discharge gun control panel 14 include a memory or a communication board connected to the CPU bus, and a program developed on the memory by the CPU. Will be executed.

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 The block diagram of the function structure of the discharge pressure control apparatus by this invention Explanatory drawing of the timing of the intermittent control signal produced | generated by the intermittent control process part of FIG. Time chart of the discharge pressure control signal in FIG. 2 when the detection pressure P of the pressure sensor is increased at a constant rate Explanatory drawing which showed the relationship between the coefficient used for the period calculation of an intermittent control signal, and a pressure deviation by the intermittent control process of FIG. Flowchart of the water discharge pressure control process of FIG.

Explanation of symbols

10: Water cannon 11: Motorized valve 12: Fire detector 13: Remote open / close valve 14: Water cannon control panel 15: Water discharge pressure control device 16: Site control panel 18: Central control panel 20: Central control panel 22: Pump 24: Pump control panel 26: Water distribution pipe 28: Air compressor 29: Air pipe 30: Pressure sensor 32: Water discharge pressure sampling unit 34: Target water discharge pressure setting unit 36: Pressure deviation calculation unit 38: Deviation comparison unit 40: Continuous control processing unit 42 : Intermittent control processing unit 44: coefficient setting unit 46: intermittent control period calculation unit 48: intermittent control signal output unit 50: intermittent control period table 52: interval period adjustment unit 54: deviation range adjustment unit

Claims (12)

A water gun that sprays fire-fighting water toward the fire source position in the alert area,
A motorized valve provided in a pipe for supplying pressurized fire-fighting water to the water gun;
A pressure sensor for detecting a water discharge pressure of the water discharge gun;
The motor-operated valve detects a pressure deviation between a detected pressure of the pressure sensor and a target pressure set in accordance with a water discharge distance to the fire source position, and eliminates the pressure deviation when the pressure deviation exceeds a predetermined range. Is controlled by a control signal, and the intermittent control signal having an ON period, an OFF period, and an interval period determined according to the pressure deviation so as to eliminate the pressure deviation when the pressure deviation is within the predetermined range. A control unit for controlling the opening of the electric valve;
An adjustment unit for setting and changing the interval period of the intermittent control signal;
A water discharge pressure control device comprising:
The water discharge pressure control apparatus according to claim 1, wherein the control unit changes an on period, an off period, and an interval period of the intermittent control signal in proportion to a pressure deviation.
2. The discharge pressure control apparatus according to claim 1, wherein the control unit sets a coefficient that changes according to a pressure deviation within the predetermined range, and an on period, an off period, and an interval period in which the coefficient is fixedly set. An on-off period, an off-period, and an interval period that change according to the pressure deviation by multiplying by the water discharge pressure control device.
4. The water discharge pressure control apparatus according to claim 3, wherein the control unit sets a maximum value of the coefficient corresponding to a pressure deviation that gives a threshold for determining the predetermined range, and corresponds to a pressure deviation of zero. A water discharge pressure control apparatus, wherein a minimum value of a coefficient is set, and the coefficient is changed between the maximum value and the minimum value according to the pressure deviation.
A water spray gun for spraying fire-extinguishing water toward a fire source position in a warning area, an electric valve provided in a pipe for supplying pressurized fire-extinguishing water to the water spray gun, and a pressure sensor for detecting the water discharge pressure of the water spray gun; In the water discharge pressure control method of the water discharge gun system equipped with
Detecting a pressure deviation between a detection pressure of the pressure sensor and a target pressure set according to a water discharge distance to the fire source position;
In a range where the pressure deviation exceeds a predetermined range, a continuous control step for continuously controlling the opening of the motor-operated valve with a control signal so as to eliminate the pressure deviation;
Intermittent control for controlling the opening degree of the motor-operated valve by an intermittent control signal having an on period, an off period, and an interval period determined according to the pressure deviation so as to eliminate the pressure deviation when the pressure deviation is within the predetermined range. Steps,
An adjustment step for changing the interval period of the intermittent control signal as necessary;
A water discharge pressure control method comprising:
The water discharge pressure control method according to claim 5, wherein the intermittent control step changes an on period, an off period, and an interval period of the intermittent control signal in proportion to a pressure deviation. .
6. The water discharge pressure control method according to claim 5, wherein in the intermittent control step, a coefficient that changes according to a pressure deviation within the predetermined range is set, and an on period, an off period, and an interval in which the coefficient is fixedly set. A water discharge pressure control method characterized by determining an on period, an off period, and an interval period corresponding to the pressure deviation by multiplying a period.
8. The water discharge pressure control method according to claim 7, wherein the intermittent control step sets a maximum value of the coefficient corresponding to a pressure deviation that gives a threshold for determining the predetermined range, and corresponds to zero pressure deviation. A water discharge pressure control method, wherein a minimum value of the coefficient is set, and the coefficient is changed between the maximum value and the minimum value according to the pressure deviation.
A water spray gun for spraying fire-extinguishing water toward a fire source position in a warning area, an electric valve provided in a pipe for supplying pressurized fire-extinguishing water to the water spray gun, and a pressure sensor for detecting the water discharge pressure of the water spray gun; To the computer of the control panel of the water cannon system with
Detecting a pressure deviation between a detected pressure of the pressure sensor and a target pressure set according to a water discharge distance to the fire source position;
In a range where the pressure deviation exceeds a predetermined range, a continuous control step for continuously controlling the opening of the motor-operated valve with a control signal so as to eliminate the pressure deviation;
Intermittent control for controlling the opening degree of the motor-operated valve by an intermittent control signal having an on period, an off period, and an interval period determined according to the pressure deviation so as to eliminate the pressure deviation when the pressure deviation is within the predetermined range. Steps,
An adjustment step for changing the interval period of the intermittent control signal as necessary;
A program characterized by having executed.
10. The program according to claim 9, wherein the intermittent control step changes an on period, an off period, and an interval period of the intermittent control signal in proportion to a pressure deviation.
10. The program according to claim 9, wherein the intermittent control step sets a coefficient that changes according to a pressure deviation within the predetermined range, and multiplies the on period, the off period, and the interval period in which the coefficient is fixedly set. And determining an on period, an off period, and an interval period according to the pressure deviation.
  12. The program according to claim 11, wherein the intermittent control step sets a maximum value of the coefficient corresponding to a pressure deviation that gives a threshold value for determining the predetermined range, and sets the coefficient corresponding to zero pressure deviation. A program that sets a minimum value and changes the coefficient between the maximum value and the minimum value according to the pressure deviation.

Images