JPS5825341Y2 - Snowfall and snowfall detection device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for detecting snow accumulation and snowfall amount on road surfaces, farms, buildings, etc.

Road heaters are installed on roads to prevent traffic problems caused by frozen roads due to snow accumulation, and similarly, heaters are installed on the ground to prevent crops from being damaged due to frozen ground at farms. Laying is underway.

In order to control the energization of such heaters, it is necessary to detect snow accumulation, but conventionally, there is no suitable means to reliably detect snow accumulation, so it is necessary to detect the temperature of the road surface or ground and respond to this temperature. Attempts have been made to energize heaters to keep the road or ground at a temperature above freezing.

For this reason, electricity must be constantly supplied to maintain the temperature of the road or ground at a predetermined value regardless of the presence or absence of snow, resulting in large power consumption and being uneconomical.

Furthermore, since there is no suitable means for measuring the amount of snowfall, measurement has been troublesome in the past because observers have had to walk through the snow to the measurement point to measure the amount of snowfall.

An object of the present invention is to provide a device that can reliably and easily detect snow accumulation and snowfall amount.

Embodiments of the present invention will be described in detail with reference to the drawings. The drawings show a snowfall/snow accretion detection device 10 according to the present invention, and this device 10 includes an antenna conductor 12, a discharge circuit 14, a detection circuit 15 It consists of.

The antenna conductor 12 is suspended in the air, and both ends thereof are insulated and secured to a suitable support 20, 20, such as a steel tower, by wires 22, 22 and insulators 24, 24.

The snow 26 is charged with static electricity, so when the snow 26 falls on or comes into contact with the conductor 12, the conductor 12
is charged with static electricity.

The discharge circuit 14 is connected to the middle of the conductor 12 via a conducting wire 28, and when a predetermined amount of charge accumulates on the conductor 12, this charge is discharged via the discharge circuit 14.

While the snow continues to fall, the conductor 12 continues to be charged, so the discharge circuit 14 repeats discharge at approximately regular intervals.

In the illustrated embodiment, the detection circuit 15 includes a recorder 16 and an alarm 1.
It consists of 8.

The recorder 16 receives a signal each time the discharge circuit 14 discharges and records the discharge circuit.

If the amount of snowfall necessary for the discharge circuit 14 to cause one discharge is known in advance, the amount of snowfall can be known from the value of the recorder 16.

The alarm device 18 generates an alarm according to the value of the recorder 16, that is, the amount of snowfall.

In addition, a detector that generates a detection signal according to the amount of snowfall can be used instead of the alarm 18. In this case, the output of the detector is connected to an automatic control device for a heater in the road surface, etc. When there is snowfall, an automatic control device can be activated to energize the heater only during snowfall.

Note that the antenna conductor 12 is not limited to a linear conductor, and may of course be a plate-shaped conductor.

As mentioned above, the present invention charges a conductor with the electric charge of snow, discharges this static electricity by a discharge circuit, and detects this discharge current by a detection circuit. Therefore, it consumes less electricity and is economical to maintain the temperature of the road surface or ground at a predetermined value, and the amount of snowfall can be easily measured from the number of discharges of the discharge circuit. can.

[Brief explanation of the drawing]

The drawing is a schematic system diagram of the snowfall/accumulation detection device according to the present invention. 10...Snowfall/snow accretion detection device, 12...
Antenna conductor, 14...discharge circuit, 15...
...Detection circuit.

Claims (1)

[Scope of utility model registration request] an antenna conductor suspended in the air with both ends held together via an insulator; a discharge circuit that discharges the static electricity when snow falls on or comes into contact with the conductor and the conductor is charged with a predetermined amount of static electricity; A snowfall detection device comprising a detection circuit that detects discharge of the circuit.