JP2006223436A - Method of adjusting water spray gun apparatus and water spray gun apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply and easily perform the adjustment work in site for obtaining the proper number of steps to indicate the nozzle direction from the output of an encoder. <P>SOLUTION: The water spray gun has a nozzle 30 attached in such a way that the nozzle can be swiveled, and the encoder 38 for detecting and outputting the position of swivel of the nozzle 30 as the number of horizontal steps. In adjusting the water spray gun, the error in the number of steps, outputted from the encoder 38 with the nozzle 30 positioned in the horizontal direction, or for example, in the front direction for obtaining a prescribed number of adjustment steps of a monitoring area, from the number of adjustment steps is computed and retained. In monitoring the apparatus, the number of steps outputted from the encoder 38 is corrected based on the retained error when the number of steps is adjusted, and the corrected number is outputted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a method for adjusting a water gun apparatus and a water gun apparatus provided with an encoder that is provided with a nozzle so as to be pivotable, and that detects and outputs the swivel position of the nozzle as the number of horizontal steps.

  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 turning position of the water cannon is detected by a rotary encoder. For example, an encoder output of 0 to 2048 steps is obtained in the range of 360 ° counterclockwise with the back of the water cannon at 0 ° position. For this reason, the turning control of the water spray gun sets the target number of steps that indicates the fire source, and rotates the motor by driving in a direction that eliminates the difference from the number of steps that indicates the current position that is output from the encoder. The number of steps to be performed is stopped at a position that matches the target number of steps.
JP-A-5-305152 JP-A-9-81873 JP 2004-248934 A JP 2004-261478 A

  However, in such a conventional water gun apparatus, when the water gun is installed in the monitoring area, the number of steps indicating the nozzle direction and the number of steps output by the encoder do not necessarily match. With the encoder input shaft disconnected, adjustment is made so that, for example, the nozzle faces the front direction of the monitoring area, and at this time, the output of the encoder becomes the number of steps indicating the front direction in which the nozzle faces, for example, 1024 steps. The input shaft is connected and fixed by tightening the screws while keeping the encoder output at 1024 steps, but the input shaft moves slightly and the encoder output is correct from 1024 steps. Often slips.

  For this reason, until the input shaft can be connected with the encoder output outputting 1024 steps, the connection fixing work is repeated many times, and there is a problem that the work for positioning the encoder at the correct position takes time and effort.

It is an object of the present invention to provide a method for adjusting a water gun apparatus that enables simple and easy adjustment work in the field to obtain the correct number of steps indicating the nozzle direction from the encoder output.

  In order to achieve this object, the present invention is configured as follows.

The present invention relates to a method for adjusting a water gun apparatus provided with an encoder that freely turns a nozzle and detects and outputs a turning angle of the nozzle.
During adjustment, with the nozzle positioned at a predetermined adjustment turning angle in the monitoring area, an error between the turning angle output from the encoder and the adjustment turning angle is calculated and held,
During monitoring, the turning angle output from the encoder is corrected by the error held at the time of adjustment and output.

Further, the present invention is a method for adjusting a water gun apparatus provided with an encoder that is provided with a nozzle so as to be pivotable, and that detects and outputs the swivel position of the nozzle as a horizontal step number,
During adjustment, with the nozzle positioned at a turning angle corresponding to a predetermined number of adjustment steps in the monitoring area, an error between the number of steps output from the encoder and the number of adjustment steps is calculated and held,
During monitoring, the number of steps output from the encoder is corrected by the error held during adjustment and output.

  Here, the adjustment method of the water gun apparatus according to the present invention positions the nozzle in the front direction at the time of adjustment, and uses the number of steps of the encoder in which the nozzle direction indicates the front direction as the adjustment step number.

  Further, the present invention provides a water gun apparatus provided with an encoder that swivels a nozzle and detects and outputs the swivel angle of the nozzle, and at the time of adjustment, the nozzle is positioned at a predetermined adjusted swivel angle in the monitoring area. The error detection holding unit that calculates and holds the error between the turning angle output from the encoder and the adjusted turning angle, and at the time of monitoring, the turning angle output from the encoder is corrected by the error held at the time of adjustment and output. And a correction calculation unit.

Furthermore, the present invention provides a water gun apparatus provided with an encoder that swivels a nozzle and detects and outputs the swivel angle of the nozzle as a horizontal step number. An error detection holding unit that calculates and holds an error between the number of steps output from the encoder and the number of adjustment steps while being positioned at a turning angle corresponding to the above, and adjusts the number of steps output from the encoder during monitoring. And a correction calculation unit that corrects and outputs the error based on the error that is sometimes held.

  According to the present invention, when setting the adjustment mode in a state where the nozzle of the water spray gun is directed in a specified direction with respect to the monitoring area, for example, the front direction when the water gun is installed in the monitoring area, the step output from the encoder The error of the number of steps (turning angle) and the number of adjustment steps (adjustment turning angle) indicating the nozzle front direction is detected and held. During normal monitoring, the number of steps output from the encoder (turning angle) is the error held during adjustment. Therefore, the encoder can be adjusted easily and easily on site.

In particular, it is freed from complicated adjustment work for connecting and fixing the input shaft so that the output does not change in the adjustment state of the encoder, and the work load for adjusting the encoder can be greatly reduced.

  FIG. 1 is an explanatory view of a water gun system to which the present invention is applied. In FIG. 1, the water gun system is installed in a facility having a large monitoring area such as a ball game field or an exhibition hall, and, for example, four water guns 10 are installed in each predetermined monitoring area. A scanning fire detector 12 is provided corresponding to the monitoring area, is installed at a position overlooking the warning area from above, and monitors the fire in the warning area by optical horizontal and vertical scanning.

  A water distribution pipe 26 is connected to the water discharge gun 10 from a pump 22 provided in the pump chamber, and an air pipe 29 from an air compressor 28 is connected. The pump 22 is controlled by a pump control panel 24. Each of the water distribution pipes 26 branched from the water discharge gun 10 is provided with an electric valve 11 that operates as a water discharge pressure control valve.

  A water cannon control panel 14 is provided for each of the water cannons 10, and a field operation panel 16 is provided for the water cannon control panel 14. 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.

  In such a water gun system, when one of the scanning fire detectors 12 detects a fire in a warning area, a fire determination signal and a position signal indicating the horizontal and vertical scanning positions of the fire source are sent to the central control panel. 18 is output.

  In the central control panel 18, a fire occurrence message is output to the display of the central console 20 based on the fire determination signal, and the three-dimensional coordinate position of the fire source is detected from the position signal, and a fire has occurred. The turning control to the fire source position is instructed to the water gun control panel 14 of the water gun 10 installed in the warning area. In response to the turning instruction from the central control panel 18, the water cannon control panel 14 performs turn control to the fire source position for the water cannon 10.

  The water discharge after the water gun 10 is swiveled toward the fire source is either manually activated by the on-site operation panel 16, remotely activated by an instruction from the central control panel 18, or automatically activated by automatic setting. The pressurized fire extinguishing water is supplied from the pump 22 through the water distribution pipe 26, and at the same time, compressed air is supplied from the air compressor 28 through the air pipe 29 and compressed around the fire extinguishing water in the nozzle of the water discharge gun 10. By spraying air and mixing air and water, fire-fighting water is sprayed while ensuring a sufficient water discharge distance with a low water discharge pressure and a small water discharge amount.

  The water discharge distance in the water discharge gun 10 is performed by controlling the water discharge pressure by controlling the opening degree of the electric valve 11. That is, the central control panel 18 sets the target water discharge pressure corresponding to the target distance from the water gun 10 to the fire source to the water gun control panel 14 simultaneously with the turning instruction of the water gun 10. Feedback control is performed to keep the discharge pressure at the target discharge pressure.

  FIG. 2 is a block diagram of the functional configuration of the water gun according to the present invention. In FIG. 2, the water spray gun 10 is equipped with a horizontal swivel unit 34 having a motor 36 built in on a gantry 32, a nozzle 30 is mounted on the horizontal slewing unit 34, and the nozzles with respect to the gantry 32 are driven by the rotation of the motor 36. The horizontal swivel unit 34 equipped with 30 can be swung within a range of 0 ° to 360 °.

  A water distribution pipe 26 is connected to the nozzle 30, and the water distribution pipe 26 is provided with an electric valve 11 for controlling the discharge pressure and a gate valve 13 used during inspection. In addition, compressed air is supplied from the air pipe 29. The elevation angle of the nozzle 30 mounted on the horizontal swivel unit 34 is fixed at a constant angle so that the maximum flight distance can be obtained when water for fire extinguishing is discharged.

  An encoder 38 is attached to the upper part of the water gun 10. The encoder 38 outputs a detection signal indicating the amount of rotation (turning angle) associated with the rotation of the nozzle 30 by the motor 36. A general rotary encoder can be used as the encoder 38, and either a magnetic type or an optical type can be used as the rotary encoder. The input shaft of the encoder 38 is connected to a connecting member 39 provided on the turning shaft of the nozzle 30, and the turning of the connecting member 39 due to the turning of the nozzle 30 is detected by the encoder 38.

  When the encoder 38 is assembled at the manufacturing stage of the water cannon 10, the positional relationship with respect to the direction of the nozzle 30 in the water cannon 10 is not particularly adjusted, and the rotation of the nozzle 30 is transmitted to the input shaft of the encoder 38. Are connected by a connecting member 39.

  Here, the encoder 38 outputs a signal indicating the number of steps according to the rotation angle in the range of 0 ° to 360 °, and the rotation angle 0 ° to 360 ° is 0 to 2048 steps by the output of the encoder 38.

  When the water gun 10 of the present invention is installed in the monitoring area, the relationship between the number of steps output from the encoder 38 and the turning angle in the logical monitoring area (logical control space) of the water gun control panel 14 is the warning area. When the turning angle is 0 ° with the nozzle 30 facing directly behind, the number of steps is 0 step, and when the nozzle 30 is rotated 360 °, the number of steps is 2048 steps. Therefore, the nozzle 30 of the water cannon 10 is monitored for adjustment. The number of steps in the front direction of the area indicates 1024 steps.

  The water gun control panel 14 includes a control unit 40, a pulse generation unit 42, a turning detection unit 44, an encoder adjustment processing unit 46, a power supply unit 48, and a short circuit detection unit 50. The control unit 40 receives the instruction of the turning target position from the central control panel 18 or the on-site operation panel 16 in FIG. 1 and controls the nozzle 30 of the water discharge gun 10 to turn in the target direction, and controls the water discharge pressure at the start of water discharge.

  The target turning direction at this time is indicated by the number of turning target steps indicating the target angle. When the control unit 40 receives the instruction of the turning target step number, it receives the step number indicating the current nozzle direction detected by the turning detection unit 44 from the output of the encoder 38 through the encoder adjustment processing unit 46 and turns. The difference from the target number of steps is obtained, turning control in the turning direction to eliminate the difference in the number of steps is started by driving the motor 36, and the step number based on the detection output of the encoder 38 is stopped at a position that matches the target number of steps. Then, the nozzle 30 is directed to the target position.

  The turning drive of the motor 36 by the control unit 40 is performed according to a speed pattern that changes between acceleration, constant speed, and deceleration with respect to the target turning position. At this time, the speed of the motor 36 is controlled by duty pulse control from the pulse generator 42.

  At the start of turning, the control unit 40 outputs an on-duty of a pulse signal having a fixed period from the pulse generation unit 42 as 100 percent, for example, and converts it into a voltage pulse signal by the power supply unit 48 to use the motor 36 using a DC motor. Is driven to accelerate the horizontal turning section 34. When the turning speed reaches a constant speed, the pulse generator 42 reduces the on-duty of the pulse signal to a value corresponding to the constant speed, and in this state, constant speed control is performed until the remaining number of steps with respect to the target step position reaches a predetermined number of steps. Do.

  When the remaining number of steps relative to the target number of steps reaches a predetermined value, deceleration control is started by reducing the on-duty of the pulse signal from the pulse generator 42, and the number of steps based on the output of the encoder 38 matches the target number of steps. When this occurs, the short-circuit detection unit 50 short-circuits the control line of the motor 36 and applies a brake to stop the turning drive.

  If the target step position is overrun when the turn is stopped, the difference from the number of steps by the output of the encoder 38 after the overrun is obtained, and the target is turned in the reverse direction so as to eliminate this difference. Stop in position.

  FIG. 3 is a block diagram of a functional configuration of the encoder adjustment processing unit 46 of FIG. In FIG. 3, the encoder adjustment processing unit 46 includes an adjustment value setting unit 52, an error detection holding unit 54, and a correction calculation unit 56.

  In the encoder adjustment processing according to the present invention, the encoder adjustment processing unit 46 performs the processing by instructing the adjustment processing with the nozzle 30 of the water cannon 10 shown in FIG. . The adjustment process is instructed by operating the local operation panel 16. For this adjustment, the operation of turning the nozzle 30 of the water spray gun 10 in the front direction of the monitoring area is performed by rotating the motor 36 by manual operation on the field operation panel 16 shown in FIG.

  When the adjustment process is instructed to the water spray gun control panel 14 with the nozzle 30 of the water spray gun 10 facing in the front direction as described above, the encoder adjustment processing unit 46 of FIG. 3 operates. In the adjustment value setting unit 52 of the encoder adjustment processing unit 46, the adjustment step number HSo obtained from the detection output of the encoder 38 when the nozzle 30 of the water cannon 10 is directed in the front direction is the nozzle direction at the time of adjustment. HSo = 1024 steps indicating the front direction is preset.

When the adjustment process is started in this state, the number of steps based on the detection output from the encoder 38 at this time is given from the turning detection unit 44 to the error detection holding unit 54 as the step number HS. The error detection holding unit 54 subtracts the step number HS obtained based on the output of the encoder 38 from the adjustment step number HSo set by the adjustment value setting unit 52 to obtain an error ΔHS (error ΔHS) = (adjustment). Step number HSo)-(Step number HS)
Calculate and hold as

  The error ΔHS calculated and held in the error detection holding unit 54 in this way is set for the correction calculation unit 56 for correction calculation. Further, the error ΔHS detected by the error detection holding unit 54 is sent to the database provided in the central control panel 18 shown in FIG. 1 and registered through the control unit 40 shown in FIG.

  The error ΔHS for encoder adjustment processing detected and held on the water cannon control panel 14 side is registered in the database on the central control panel 18 side. Even when the retained error ΔHS is lost, the necessary error ΔHS is not obtained from the database of the central control panel 18 without performing the adjustment process again by turning the nozzle 30 of the water discharge gun 10 in the front direction. You can get it.

  FIG. 4 is an explanatory view of the encoder adjustment according to the present invention, and shows the water gun 10 in a plan view in a state where it is installed in the warning area. In FIG. 4, the logical number of turning steps in the turning control of the water cannon control panel 14 represents a range of 360 ° counterclockwise with the back surface of the water cannon 10 being 0 ° as 0 to 2048 steps. The number of logical steps handled in the processing of the water discharge gun control panel 14 when the nozzle 30 of the gun 10 is directed in the front direction of the alert area, that is, in the 180 ° direction, is 1024 steps.

  On the other hand, the encoder 38 installed in the water cannon 10 is not particularly positioned or adjusted with respect to the logical step in the control of the water cannon control panel 14, and therefore in this example, the encoder 38 is positioned in the 0 ° direction on the back surface, which is the logical step. On the other hand, the zero step of the encoder 38 has an arbitrary deviation amount.

In such an unadjusted state of the encoder 38, in the present invention, the nozzle 30 of the water discharge gun 10 is directed to the front 180 ° direction, which is 1024 steps in logical steps, and in this state, the encoder adjustment processing shown in FIG. When the adjustment process by the unit 46 is performed, it is assumed that, for example, the detection step number HS = 940 steps is obtained from the encoder 38 corresponding to the direction of the front surface of the nozzle 30 in the 180 ° direction. In this case, the error ΔHS is calculated as ΔHS = 1024−940 = 84 steps in the error detection holding unit 54 of FIG. 3 and stored in the error detection holding unit 54, and at the same time, the correction calculation unit 56 performs the correction calculation. Set to the output state. The error ΔHS calculated at the time of the adjustment represents a logical step offset that is a difference between the zero step in the encoder 38 and the zero step in the rear direction, which is the logical step in FIG.

If the error ΔHS for correction calculation can be calculated by the encoder adjustment processing unit 46 in this way, the calculation function by the correction calculation unit 56 becomes effective when the adjustment processing is canceled and the normal monitoring operation is performed. A correction operation for adding the error ΔHS detected and held in the adjustment process to the detection step number HS output from the turning detection unit 44 based on the output of the encoder 38, that is, HS = HS + ΔHS.
After performing the correction, the data is output to the control unit 40.

For example, in the case of FIG. 4, if ΔHS = 84 steps and the detection step number HS based on the output of the adjusted encoder 38 is HS = 940 steps, the correction calculation unit 56 sets HS = 940 + 84 = 1024 steps. The number of steps indicating the front direction in which the correct nozzle 30 faces can be corrected and output.

  Therefore, the central console 20 can correctly display the direction in which the water gun 10 is currently facing from the monitor. When a turn command specifying the number of steps of the encoder 38 is received from the central control panel 18 when a fire is detected, the water cannon control panel 14 calculates the detection step value HS in consideration of the previously set error ΔHS, By turning the water gun 10, it is possible to match the direction as instructed by the central control panel 18.

  FIG. 5 is a flowchart of the adjustment processing by the encoder adjustment processing unit 46 of FIG. In FIG. 5, when the adjustment process is started, first, in step S1, the water gun 10 is controlled to turn in the front direction with respect to the warning area, that is, the back of the water gun 10 is 0 °, so that the water gun 10 is turned 180 °. Stop.

  In this state, if there is an instruction for adjustment processing in step S2, the process proceeds to step S3, where the number of detection steps HS of the encoder 38 at this time is read, and then, in step S4, a preset number of adjustment steps indicating the front direction of the nozzle. An error with respect to HSo = 1024 steps is calculated, and the error is saved in step S5 and set as a parameter for correction calculation. In step S6, the calculated error is registered in the database of the central control panel 18 and backed up.

  As described above, the adjustment of the encoder 38 in the water gun apparatus of the present invention does not require the conventional mechanical connection, that is, fixing work by screwing, and the nozzle 30 of the water gun 10 is simply adjusted during the adjustment. As shown in FIG. 4, the water gun can be automatically set as shown in FIG. 4 simply by instructing the water gun control panel 14 to perform adjustment processing by a command or a switch operation in a state where the adjustment direction is determined by turning in the front direction. An error between a logical step used for turning control of the control panel 14 and a step based on an actual encoder output is detected and held.

  In a normal monitoring operation after canceling this adjustment process, the number of steps obtained from the output of the encoder 38 is corrected by using the error detected and stored during the adjustment process. Therefore, the adjustment of the encoder 38 at the site can be made simple and easy, and the work load in the adjustment work of the conventional encoder 38 can be greatly reduced.

  In this embodiment, the direction of the water gun during the adjustment process is set to the front (180 °), and the error ΔHS is calculated based on the value of the encoder at that time. The error ΔHS may be calculated by measuring the value of the encoder when it is turned (°) or sideways (90 °).

  Further, the water gun according to the present embodiment swivels only in the horizontal direction, but the encoder for controlling the vertical direction also in the water gun that swivels in the vertical direction to adjust the water discharge distance. It can also be applied to error compensation.

The present invention includes appropriate modifications without impairing 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 Block diagram of functional configuration of a water gun according to the present invention Block diagram of a functional configuration of the encoder adjustment processing unit of FIG. Illustration of encoder adjustment according to the present invention Flowchart of encoder adjustment process of FIG.

Explanation of symbols

10: Water cannon 11: Electric valve 12: Fire detector 13: Remote open / close valve 14: Water cannon control panel 16: On-site operation panel 18: Central control panel 20: Central operation console 22: Pump 24: Pump control panel 26: Arrangement Water pipe 28: Air compressor 29: Air pipe 30: Nozzle 32: Mount 34: Horizontal swivel unit 36: Motor 38: Encoder 39: Connecting member 40: Control unit 42: Pulse generation unit 44: Swirl detection unit 46: Encoder adjustment processing unit 48: Power supply unit 50: Short circuit detection unit 52: Adjustment value setting unit 54: Error detection holding unit 56: Correction calculation unit

Claims (5)

In the adjustment method of the water gun apparatus provided with an encoder that is provided with a nozzle so as to be swivelable and detects and outputs a swivel angle of the nozzle,
At the time of adjustment, with the nozzle positioned at a predetermined adjustment turning angle in the monitoring area, an error between the turning angle output from the encoder and the adjusted turning angle is calculated and held,
An adjustment method of a water gun apparatus, wherein the turning angle output from the encoder is corrected by the error held at the time of adjustment and output during monitoring.
In a method for adjusting a water gun apparatus provided with an encoder that is provided with a nozzle so as to be pivotable, and that detects and outputs the swivel angle of the nozzle as a horizontal step number,
During adjustment, with the nozzle positioned at a turning angle corresponding to a predetermined number of adjustment steps in the monitoring area, an error between the number of steps output from the encoder and the number of adjustment steps is calculated and held,
A method for adjusting a water gun apparatus, wherein the number of steps output from the encoder is corrected by an error held at the time of adjustment during monitoring.
3. The adjustment method of the water gun apparatus according to claim 2, wherein the nozzle is positioned in the front direction of the warning area at the time of adjustment, and the number of steps of the encoder indicating the front direction is the adjustment step number. A method for adjusting the water gun apparatus.
In a water gun apparatus provided with an encoder provided with a nozzle so as to be pivotable, and detecting and outputting a swivel angle of the nozzle,
An error detection holding unit that calculates and holds an error between the turning angle output from the encoder and the adjusted turning angle in a state where the nozzle is positioned at a predetermined adjustment turning angle in the monitoring area at the time of adjustment;
A correction calculation unit that corrects and outputs the turning angle output from the encoder by the error held during the adjustment during monitoring;
A water gun apparatus comprising:
In a water gun apparatus provided with an encoder that is provided with a nozzle so as to be pivotable, and that detects and outputs the swivel angle of the nozzle as a horizontal step number,
During the adjustment, error detection and holding for calculating and holding an error between the number of steps output from the encoder and the number of adjustment steps in a state where the nozzle is positioned at a turning angle corresponding to a predetermined number of adjustment steps in the monitoring area. And
A correction calculation unit that corrects and outputs the number of steps output from the encoder at the time of monitoring by the error held during the adjustment; and
A water gun apparatus comprising:

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