JP2008127800A - Control unit of sprinkler system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control unit of a sprinkler system, which can properly control water sprinkling in accordance with the status of use, while suppressing erroneous operations. <P>SOLUTION: This control unit of the sprinkler system comprises: an object temperature sensor 11 for detecting the temperature of an object subject to water sprinkling; an air-temperature sensor 12 for detecting an air-temperature; and a sprinkling control portion which determines a water-sprinkling starting time and a water-sprinkling stopping time, according to a temperature difference between the temperature of the object 1 detected by the object temperature sensor 11, and the air temperature detected by the air-temperature sensor 12. Thus, even if such a relationship between the air temperature and the temperature of the object 1 as to be established during the implementation of measures against a heat-island phenomenon is not univocal, or even if a road surface temperature-changing condition, for example, in the prevention of road surface freezing occurs, the control unit properly controls the water sprinkling, while suppressing the erroneous operations. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a control device for a watering device that prevents, for example, a heat island by watering or prevents freezing of a road surface.

  A watering device that sprays well water or the like onto an object is used for measures against heat islands or prevention of freezing of the road surface.

By the way, in measures against heat island and prevention of road surface freezing, the start / stop of the watering device, that is, the start / stop of the pump is controlled mainly using detection information obtained by one sensor. Specifically, a watering device used for heat island countermeasures uses an air temperature sensor, and in summer, when the temperature detected by the air temperature sensor exceeds the set temperature, a control to start the pump is used to control the well water from the well. The water is pumped up and sprinkled on the road surface, and the road surface is cooled with well water (see, for example, Patent Document 1). In addition, the sprinkler used for road surface freeze prevention uses a road surface temperature sensor that detects the road surface temperature, and in winter, when the road surface temperature sensor falls below the set temperature, a well pump is used to control the well water from the well. Measures are taken to pump water, spray water onto the road surface, and increase the road surface temperature with the thermal energy of well water (see, for example, Patent Document 2).
JP 2006-083559 A JP 2001-228265 A

  Control of a watering device that relies on such a single sensor is problematic in that proper operation in accordance with the situation cannot be performed.

  Specifically, in the case of controlling the watering device used for heat island countermeasures, it depends on the temperature from the temperature sensor. For example, if the temperature is almost constant and only the temperature of the target is higher than that, set In contrast to temperature and temperature, the watering device may not start at the time when it should be operated. Moreover, if the set temperature is set low so as to avoid it, the watering device may be frequently activated when the temperature is high but the temperature of the object is not so high when it is not necessary. The same thing may occur in stop control of the sprinkler.

  Even in the case of controlling a sprinkler used to prevent road surface freezing, it depends on the temperature from the road surface temperature sensor.Therefore, the amount of traffic on some roads is large and the road surface temperature locally rises from other parts. If the temperature of the road surface is forced to be detected, the water temperature can not be started at the time when it should be operated or it is not necessary in the contrast between the set temperature and the road surface temperature, as in the case of the heat island countermeasure. There is a risk that the sprinkler will start.

  Then, the objective of this invention is providing the control apparatus of the watering apparatus which can perform appropriate watering control suitable for a use condition, suppressing an incorrect operation | movement.

  In order to achieve the above object, the present invention provides an object temperature sensor for detecting the temperature of an object to be sprinkled, an air temperature sensor for detecting an air temperature, and the temperature and temperature of the object detected by the object temperature sensor. The structure which comprised the watering control part which determines a watering start time and watering stop time according to the temperature difference with the air temperature detected with a sensor was employ | adopted.

  With this configuration, a situation in which operation variations are likely to occur is allowed by a temperature difference between a constant object temperature and air temperature, so that appropriate watering control can be performed while suppressing erroneous operations.

  In particular, in the case of a control device for a cooling sprinkler used for measures against heat island, the sprinkler control unit can sprinkle when the air temperature is equal to or higher than a predetermined constant temperature and the temperature difference between the temperature of the object and the air temperature is equal to or higher than a predetermined value. It is optimal to adopt a configuration having a cooling application function that starts water spraying and stops sprinkling when the temperature difference becomes equal to or less than a certain value.

  In addition, the controller for the watering device for heating used for preventing the road surface from freezing is a watering control unit that sprays water when the temperature is equal to or lower than a predetermined constant temperature and the temperature difference between the temperature of the object and the temperature is equal to or lower than a certain value. It is optimal to adopt a configuration having a heating application function that stops watering when the temperature difference becomes equal to or greater than a certain value.

  Of course, if the watering control unit has both the heating application function and the cooling application function, the number of parts sharing the sensor can be reduced, and it can be used according to the usage situation. The

  According to the first aspect of the present invention, even when the relationship between the air temperature seen in the heat island countermeasure and the temperature of the object is not unambiguous, or the road surface temperature seen in the road freezing prevention changes. Even at times, it is possible to perform appropriate watering control that suppresses the occurrence of an erroneous operation, and in any aspect, appropriate watering control suitable for the use situation can be performed.

  According to the invention which concerns on Claim 2, the control apparatus of the watering apparatus for heating used for road surface freezing prevention at the time of winter is optimal.

  According to the third aspect of the present invention, it is most suitable for a control device for a cooling sprinkler used for heat island countermeasures in summer.

  According to the invention which concerns on Claim 4, one control apparatus which diverted control equipment can use properly, such as a heat island countermeasure at the time of summer, and sprinkling control of the road surface freezing prevention at the time of winter.

  Hereinafter, the present invention will be described based on an embodiment shown in FIGS.

  A in FIG. 1 shows the whole control device of a watering device for heat island countermeasures / road surface freezing prevention (cooling / heating also), for example, 1 in FIG. 1 shows an object to be watered, for example, a road surface, Reference numeral 2 denotes a water spray pipe piped along the road shoulder of the road surface 1, and 2 a denotes a water spray nozzle formed in the water spray pipe 2 in a large number (only a part is shown).

  In the figure, reference numeral 5 indicates a well (sprinkling supply source), and reference numeral 6 indicates a pump for pumping well water (ground water) in the well 5, for example, a submersible pump. The discharge part of the submersible pump 6 is connected to the sprinkler pipes 2 and 2 via the discharge pipe 7. Thereby, the watering part 8 is comprised. That is, when the electric motor section 6a (pump drive source) of the submersible pump 6 is excited, the well water is pumped to the sprinkling pipes 2 and 2 by the pump operation of the pump section 6b, and the well water is sprinkled onto the road surface 1 from each sprinkling nozzle 2a. It is like that.

  In the figure, reference numeral 10 denotes, for example, a support built on the side of the road surface 1. A radiation type temperature sensor 11 is installed at the upper end of the column 1 as an object temperature sensor. When the radiant energy of the road surface 1 at a distant point is incident on the incident portion 11a, the radiant temperature sensor 11 calculates the intensity of the radiant energy by the calculating portion 11b, and the surface of the road surface 1 is calculated from the obtained strength. Has the function of measuring temperature. For example, a structure for detecting infrared rays is used. However, the radiation temperature sensor 11 is provided with a cold junction temperature detection temperature sensor 12 for detecting its own ambient temperature (corresponding to the air temperature) in advance as a device necessary for measuring the surface temperature. The radiation temperature sensor 11 is positioned and fixed to the support column 10 using an arm-shaped bracket 13 so that the incident portion 11a faces a predetermined part of the road surface 1.

  A control panel 15 is installed on the upper stage of the column 10. In the control panel 15, for example, a control unit 16 (corresponding to a watering control unit of the present application) configured by a circuit board having a microcomputer is housed. The output unit of the radiation temperature sensor 11 is connected to the control unit 16 and the surface temperature of the road surface 1 (the temperature of the object) is input. The control unit 16 is also connected with a temperature sensor 12 for detecting the cold junction temperature attached to the radiation temperature sensor 11. The temperature sensor 12 for detecting the cold junction temperature is used as an air temperature sensor. The detected air temperature (self atmosphere temperature) is also input.

  The controller 16 is set with a cooling application function (heat island countermeasure) and a heating application function (road surface freezing prevention) that are operated by a start switch (not shown). With these settings, the submersible pump 6 connected to the control unit 16 is controlled. For the control of the cooling application and the heating application, both the surface temperature of the road surface 1 (the temperature of the object) detected by the radiation temperature sensor 11 and the air temperature detected by the cold junction temperature detection temperature sensor 12 are used. The function of determining the watering time and the watering stop time based on the temperature difference is used.

For example, as control of cooling application function,
A function of detecting whether the temperature detected by the cold junction temperature detection temperature sensor 12 is equal to or higher than a certain temperature. For example, a function that detects when the temperature is 30 ° C. or higher as the temperature that regulates the temperature in summer when heat island phenomenon is likely to occur.

A temperature between the road temperature detected by the radiation temperature sensor 11 (surface temperature of the object) and the temperature detected by the cold junction temperature detection temperature sensor 12 when the temperature is equal to or higher than a certain temperature, for example, 30 ° C. or higher. When the difference becomes a certain value or more, for example, when the temperature difference becomes 10 ° C. or more, a function of operating the watering device, for example, a function of starting the submersible pump 6 (watering start).

Regardless of the air temperature, the temperature difference between the road surface temperature (surface temperature of the object) detected by the radiation temperature sensor 11 and the air temperature detected by the cold junction temperature detection temperature sensor 12 is different from the above. A function of stopping the operation of the watering device, for example, a function of stopping the operation of the submersible pump 6 (watering stop), for example, when the temperature difference becomes equal to or lower than the temperature difference of 3 ° C. or less.

  Etc. are set.

For example, as a control of the heating application function,
A function of detecting whether the temperature detected by the cold junction temperature detection temperature sensor 12 is equal to or lower than a certain temperature. For this, the temperature in winter is likely to cause road surface freezing.

The temperature difference between the road surface temperature detected by the radiant temperature sensor 11 (surface temperature of the object) and the air temperature detected by the cold junction temperature detection temperature sensor 12 is less than a certain value. The function of operating the watering device, for example, the function of starting the submersible pump 6 (watering start).

-The temperature is above a certain temperature, and the temperature difference between the road surface temperature (surface temperature of the object) detected by the radiation temperature sensor 11 and the temperature detected by the cold junction temperature detection temperature sensor 12 is a certain value or more. A function of stopping the operation of the watering device when it becomes (a value different from the above), for example, a function of stopping the operation of the submersible pump 6 (watering stop).

  Etc. are set.

  Next, the operation of the watering apparatus configured as described above will be described.

  A countermeasure against heat island during summer will be described with reference to the flowchart of FIG. The control unit 16 always functions in two modes of cooling and heating.

  First, as shown in step S1 and step S2 of the flowchart of FIG. 2, the control unit 16 reads the temperature T1 from the detection output of the cold junction temperature detection temperature sensor 12 constituting a part of the radiation temperature sensor 11, The road surface temperature T2 (object temperature) is read from the detection output of the radiation temperature sensor 11.

  Then, it progresses to step S3 and the control part 16 determines whether it is the temperature condition which is easy to generate | occur | produce a heat island from contrast with temperature T1 and the predetermined fixed temperature value (alpha) 1. If the temperature T1 is equal to or higher than the constant temperature value α1, the process proceeds to step S4, and it is determined whether the temperature difference between the temperature T1 and the road surface temperature T2 is a constant value S1, for example, 10 ° C. or higher. Thereby, it progresses to determination of the time to start watering.

  Here, in summer, even if the air temperature is about 30 ° C., the surface temperature of the road surface becomes 40 to 50 ° C. or more due to sunlight (the surface temperature of the building roof or the wall surface is the heat to the ground) It rises more because of less conduction). This phenomenon of heat accumulation causes a heat island.

  A heat island is seen in various situations, such as when the temperature is substantially constant and the temperature of the object rises considerably, or when the temperature rises significantly but the temperature of the object is not so high. For example, the air temperature may be 30 ° C. and the temperature of the object may be 40 ° C., or the air temperature may be 35 ° C. and the temperature of the object may be 44 ° C.

  In the control depending on the temperature, it is difficult to start proper watering. However, when the temperature difference as described above becomes a certain value S1 or more, the watering start time is a constant value S1. Absorbed. Therefore, even if the air temperature is 30 ° C. and the surface temperature T2 of the road surface 1 is 40 ° C., the air temperature is 35 ° C., and the surface temperature T2 of the road surface 1 is 44 ° C. From the determination that the value is equal to or greater than the predetermined value S1, it is possible to determine the optimal timing for starting watering.

  Therefore, from the start of the submersible pump 6 in the subsequent step S5, the well water can be appropriately sprayed from the water spray nozzle 2a to the road surface 1 as shown in FIG.

  By this watering, the road surface 1 (surface) is cooled by the well water (due to the transpiration cooling effect or the like). Then, the surface temperature of the road surface 1 falls. During this time, as shown in step S6, the control unit 16 determines whether the temperature difference between the air temperature T1 and the road surface temperature T2 is a predetermined value S2 or less, for example, 3 ° C. or less, and determines when to stop watering. is doing.

  At this time, not only the surface temperature of the road surface 1 but also a change in the air temperature can be seen. For example, the air temperature may decrease to 29 ° C and the surface temperature of the road surface 1 to 32 ° C, or the air temperature may decrease to 28 ° C and the surface temperature of the road surface 1 to 32 ° C.

  In the control depending on the air temperature, it is difficult to stop watering properly. However, when the time point when the temperature difference is equal to or less than the integrated value S2 is the watering stop time, the variation that inhibits the watering stop is a constant value S2. Absorbed. Therefore, even if the air temperature is 29 ° C. and the surface temperature T2 of the road surface 1 is 32 ° C. or the air temperature is 28 ° C. and the surface temperature T2 of the road surface 1 is 32 ° C., the constant value S2 From the determination that it is as follows, it is possible to determine when to optimally stop watering.

  Therefore, from the subsequent operation stop of the submersible pump 6 in step S7, it is possible to stop watering appropriately for the situation.

  As a result, a good heat island countermeasure can be taken.

  Next, prevention of road surface freezing in winter will be described with reference to the flowchart of FIG.

  First, as shown in step S11 and step S12 of the flowchart of FIG. 3, the control unit 16 reads the temperature T1 from the detection output of the cold junction temperature detection temperature sensor 12 constituting a part of the radiation type temperature sensor 11, The road surface temperature T2 (object temperature) is read from the detection output of the radiation temperature sensor 11.

  Then, it progresses to step S13 and the control part 16 determines whether it is the temperature condition which is easy to generate | occur | produce road surface freezing from contrast with the temperature T1 and the preset constant temperature value (alpha) 2. If the temperature T1 is equal to or less than a certain temperature value α2, for example, 5 ° C. or less, it is determined that the road surface is likely to freeze. The process proceeds to step S14, and the temperature difference between the temperature T1 and the road surface temperature T2 is equal to the certain value S3. Hereinafter, for example, whether it is 2 ° C. or less is determined. Thereby, determination of the time to start watering is performed.

  At this time, despite the fact that the road surface condition is easy to freeze, there is a large amount of automobile traffic at the point where the road surface temperature is detected, and the temperature of the road surface part at the point where the temperature is detected is higher than the other parts. There is a case.

  In the control depending on the road surface temperature, it is difficult to start proper watering. However, if the time when the temperature difference becomes equal to or less than the constant value S3 as described above is the watering start time, for example, a certain road surface temperature passes due to the constant value S3. Variations that hinder proper start of watering, such as rising with volume, are absorbed. Therefore, even when the surface temperature of the road surface 1 becomes high due to the influence of the traffic volume of the automobile, it is possible to determine the optimal timing for starting watering.

  Therefore, after starting the submersible pump 6 in step S15, well water can be sprayed from the sprinkling nozzle 2a to the road surface 1 that is at a temperature that is easily frozen as shown in FIG.

  By this watering, the road surface 1 on which anti-freezing measures are taken rises due to the thermal energy of the well water. During this time, as shown in step S16, the control unit 16 determines whether the temperature difference between the air temperature T1 and the road surface temperature T2 is a certain value S4 or more, for example, 4 ° C. or more, and determines when to stop watering. .

  In the control depending on the road surface temperature, there is a risk that the appropriate watering stop may be hindered due to the influence of the traffic volume of the automobile, but when the temperature difference becomes a certain value S4 or more as described above, the watering stop timing is set. The constant value S3 absorbs variations that hinder proper start of watering, such as not stopping or frequently stopping. Therefore, from the subsequent stop of the operation of the submersible pump 6 in step S17, it is possible to stop watering appropriately for the situation.

  Thereby, good road surface freezing prevention can be performed.

  In this way, due to the control that determines the sprinkling start timing and sprinkling stop timing according to the temperature difference between the temperature of the object and the air temperature, there is a variation in operation when heat island countermeasures and road surface freeze prevention, that is, sprinkling may not start. Appropriate watering control can be performed while suppressing the occurrence of erroneous operations (variations) such as frequent watering when not necessary.

  In particular, in controlling the watering device used for heat island countermeasures, watering is started when the temperature is above a predetermined constant temperature and the temperature difference between the temperature of the object and the temperature is above a certain value. Adopting the function to stop watering when it becomes can realize optimal watering control suitable for heat island countermeasures.

  In addition, for the control of the watering device used for road surface freezing prevention, watering is started when the temperature is below a certain constant temperature and the temperature difference between the temperature of the object and the temperature is below a certain value, and the temperature difference is constant. Adopting the function of stopping watering when the value exceeds the value can realize optimal watering control suitable for preventing road surface freezing.

  Also, if both the heating application function and the cooling application function are set in the control unit 26, the conflicting watering (cooling / heating) such as heat island countermeasures and road surface freezing prevention can be achieved only with the control device sharing the sensor. It can be used easily according to the usage.

  In one embodiment of the present invention, an example is given in which both the heating application function and the cooling application function are set in the control unit. However, the present invention is not limited to this, and the control unit 16 has a heating application as shown in FIG. Even if only the function is set and the control device A1 dedicated to the water spray device for heat island countermeasures is set, only the cooling application function is set in the control unit 16 shown in FIG. The device A2 may be used.

  In this way, the dedicated device for each application is optimal for a watering device control device used for heat island countermeasures in summer and a watering device control device used for prevention of road surface freezing in winter. In FIG. 4, the same parts as those in FIG.

  In the above-described embodiment, the example in which the object to be sprinkled is the road surface has been described. However, the present invention is not limited to this. For example, for heat island countermeasures, water may be sprinkled on the wall surface of a building.

The figure which shows the structure of the control apparatus of the watering apparatus which concerns on one Embodiment of this invention. The flowchart which shows control of the cooling use of the control apparatus. The flowchart which shows control of the heating use of the control apparatus. The figure which shows the structure explaining the principal part of other embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Road surface (object), 6 ... Submersible pump (pumping pump), 11 ... Radiation type temperature sensor (object temperature sensor), 12 ... Temperature sensor for cold junction temperature detection (temperature sensor), 16 ... Control part (watering) Control unit).

Claims (4)

An object temperature sensor for detecting the temperature of the object to be sprinkled;
A temperature sensor for detecting the temperature;
A watering control unit that determines a watering start time and a watering stop time according to a temperature difference between the temperature of the object detected by the object temperature sensor and the air temperature detected by the air temperature sensor. Watering control device for the watering device.   The watering control unit starts watering when the temperature is not more than a predetermined constant temperature and the temperature difference between the temperature of the object and the temperature is not more than a certain value, and the temperature difference becomes not less than a certain value that is different. The watering control device for a watering device according to claim 1, wherein the watering control device is configured to have a heating application function for stopping watering.   The watering control unit starts watering when the temperature is equal to or higher than a predetermined constant temperature and a temperature difference between the temperature of the object and the temperature is equal to or higher than a predetermined value, and when the temperature difference is equal to or lower than a different constant value. The watering control device for a watering device according to claim 1, wherein the watering control device is configured to have a cooling use function for stopping watering.   The watering control unit starts watering when the temperature is not more than a predetermined constant temperature and the temperature difference between the temperature of the object and the temperature is not more than a certain value, and the temperature difference becomes not less than a certain value that is different. A heating application function for stopping watering, and when the air temperature is equal to or higher than a predetermined constant temperature and the temperature difference between the temperature of the object and the air temperature is equal to or higher than a certain value, the watering is started, and the constant value is different from the temperature difference. The watering control device for the watering device according to claim 1, wherein the watering control device is configured to have a cooling use function for stopping watering when:

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