초록 ▼

Method and apparatus for protecting plants against the effects of a drop in ambient temperature by causing the formation and preservation of dew or rime, according to the circumstances. The apparatus comprises a “dew box”which measures the ambient temperature and the dew point temperature, a set of

Method and apparatus for protecting plants against the effects of a drop in ambient temperature by causing the formation and preservation of dew or rime, according to the circumstances. The apparatus comprises a “dew box”which measures the ambient temperature and the dew point temperature, a set of comparators for triggering the start of spraying and the start of water heating as a function of ambient temperature, and a control system, including a calculating device, for regulating the temperature of the spraying water.

대표청구항 ▼

A method for watering agricultural crops and the like, in which use is made of spraying devices supplied with water through a piping system and producing a fine spray, distributed evenly over an area to be protected so as to irrigate the whole extent of the area, and in which measurements are made o

A method for watering agricultural crops and the like, in which use is made of spraying devices supplied with water through a piping system and producing a fine spray, distributed evenly over an area to be protected so as to irrigate the whole extent of the area, and in which measurements are made of ambient temperature and of dew point temperature, characterized in that the measured values of the ambient temperature and the dew point temperature are used for producing a first signal which is transmitted to a device initiating watering and a second signal which, upon the ambient temperature having dropped down to a predetermined temperature, will initiate a warming-up of the water and activate a regulation of the water temperature as a function of the deviation between the measured dew point temperature and a prescribed dew point temperature for raising and maintaining the dew point temperature above a predetermined value until the ambient temperature will have dropped below said prescribed dew point temperature, in which case the spraying and warming-up of the water will be maintained in order to obtain throughout the plantation and up to a determined height an atmosphere having a dew point temperature which ensures protection of the crops against the effects of an ambient temperature drop below a determined value, by creating and maintaining dew and rime.