JPS63156942A - Temperature control for snow melting facilities - Google Patents

Abstract

PURPOSE:To make it possible to control temperature with high accuracy in a snow melting facilities of electro thermal method by judging the weather from the outdoor temperature and data of weather and operation conditions which are beforehand stored in a memory and judging the most suitable temperature for the snow melting facilities which adapts itself to said weather. CONSTITUTION:The outdoor temperature is detected by an outdoor temperature sensor 4 and when the weather is judged, the judgement is compared in a judgement circuit 7 with the data stored in a memory 1 for the weather and operation conditions and there the operation conditions for the weather are judged and it is sent to a suitable temperature judgement circuit 8. In the suitable temperature judgement circuit 8 the inputted operation condition and the suitable temperature data stored in a memory 2 for a suitable temperature are compared and the most suitable temperature under the condition of that operation is judged. On the basis of this judgement the temperature of a snow melting device is controlled automatically. By the way a temperature judgement circuit 5, counters 31-3n, and weather and operational condition judgement circuit 7 are operated individually everytime a particular period signal is issued from a timer circuit 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of controlling various temperatures such as preheating temperature and snow melting temperature of snow melting equipment for road surfaces, including electric heating systems.

(Prior art) Conventional snow melting equipment for road surfaces uses road surface temperature, road surface wood content, snowfall conditions, etc. alone or in combination to determine the operating conditions of the snow melting equipment, and based on this, the heat source of the equipment is determined. The temperature was controlled.

(Problems with the Prior Art) Snow melting operations can be roughly divided into snow melting operations that melt snow on the road surface, and preheating operations that allow the snow melting effect to be exerted immediately after the heat source is turned on, even on road surfaces with a large heat capacity. Snow melting operations are affected by various weather conditions, especially the amount of snowfall and the wetness of the road surface.

In order to carry out efficient snow melting operations, it is best to operate in accordance with the weather conditions, and among various weather conditions, it is said to be particularly effective to determine operating conditions based on the outside temperature.

(Problems with conventional technology) However, the road surface has a large heat capacity and there is a long delay in the rise in road surface temperature after the heat source is turned on. It is difficult to drive according to the outside temperature.

Also, since the operation period is long, 3 to 5 months, the climate changes significantly during that time. However, in the conventional snow melting operation method, the operating conditions are set constant, so the snow melting heater heats up too much in warm climates, and underheats the snow melting heaters in cold climates. It was not possible to perform snow melting operations that were optimal for the conditions. For this reason, there are problems with the quality of the snow melting equipment, and it is also difficult to use in terms of energy consumption.
There were m topics.

(Object of the Invention) An object of the present invention is to provide a temperature control method for snow melting equipment in which a change in climate is determined from the outside air temperature and the heat source of the snow melting equipment is automatically controlled to the optimum temperature for that climate. It is.

(Means for Solving the Problems) The temperature control method for snow melting equipment of the present invention classifies outside air temperature into specific temperature ranges, and adjusts the outside air temperature measured at regular intervals within a specific time to the applicable temperature each time. The frequency of classification into each temperature range and the relationship between the climate and operating conditions such as snow melting, preheating, and anti-freezing are classified into several ways and stored as climate/operating condition data. Specific snow melting, preheating,
The relationship between operating conditions such as freezing prevention and the appropriate temperature of the snow melting equipment under those operating conditions is classified into several ways and stored as appropriate temperature data, and the outside air temperature is measured under the same or similar conditions as the above measurement conditions. and classify them into the appropriate temperature range each time.
Determine the appropriate temperature for the snow melting equipment at the time of outside temperature measurement based on at least the frequency of classification into each temperature range, pre-stored climate/operating condition data, and suitable temperature data, and set the temperature of the snow melting equipment based on that determination. It is something to control.

(Action of invention) The figure shows one embodiment of the invention.

1 in the figure is the memory for climate and driving conditions, and this memory 1
The relationship between the outside temperature, the climate at that temperature, and operating conditions such as snow melting, preheating, and anti-freezing for that climate is classified into several ways and stored as climate/operating condition data.

2 in the figure is a memory for suitable temperature data, and in this memory 2, the relationship between a specific operating condition and the optimum temperature under that operating condition is classified into several types and stored as suitable temperature data.

The outside air temperature is detected by the outside air temperature sensor 4 shown in the figure at regular intervals within a specific time, and is measured by the temperature judgment circuit 5, and the temperature is classified into predetermined temperature ranges (for example, every 5 degrees Celsius). It is determined to which temperature range it falls, and each time it is classified and input to the counters 31 to 3n of the corresponding temperature range. Each time the counters 3I to 3n receive an input, the input frequency (classification frequency) is counted for each temperature range.

When the measurement within the measurement time is completed, all data reading is completed and the total count up to that point is counted for each temperature range. This counted value is sent to the climate/driving condition determination circuit 7, where the counted value is compared with the climate/driving condition data stored in the climate/driving condition memory 1, and the climate corresponding to the counted value is determined. It is determined. In this case, the determination is made by sequentially searching the counters 31 to 3n, and when the count a satisfies a certain climate condition, it is determined that the climate is 0. For example, if the count is in the range of -10℃ to -15℃ 5 times, -5 16 times in the range of °C to -10 °C, 2 times in the range of 0 °C to -5 °C, it is extremely cold climate, 10 times in the range of θ °C to 5 °C, 10 times in the range of 5 °C
If the range is between 10°C and 10°C 10 times, and the range between 10°C and 15°C twice, the climate is determined to be November or December.

Once the climate is determined, the determination circuit 7 compares the climate with the climate/operating condition data stored in the climate/operating condition memory 1, and determines snow melting, preheating,
Operating conditions such as anti-freezing are determined, and the operating conditions are sent to the appropriate temperature determining circuit 8.

The appropriate temperature determination circuit 8 compares the input operating conditions with the appropriate temperature data stored in the appropriate temperature memory 2 and determines the optimum temperature under the operating conditions.Based on this determination, the temperature S( For example, the temperature of a snow melting heater) is automatically controlled.

Note that the temperature determination circuit 5, the counters 31 to 311, and the climate and driving determination circuit 7 are all activated every time a specific periodic signal is transmitted from the timer circuit 6.

(Example of the invention) The figure shows one embodiment of the invention.

4 in the figure is an outside air temperature sensor, which uses a thermistor, a platinum temperature sensor, or the like.

Reference numeral 5 in the figure indicates a temperature measurement circuit, which is configured so that the temperature measurement circuit 5 measures the outside air temperature each time a timing signal is transmitted from the timer circuit 6 at a specific period.

A command program is incorporated in the timer circuit 6.

31 to 3n are counters. This is the outside temperature, for example,
Classified into ranks 1 to 7 in 5°C increments, each counter 31
-3n correspond to the outside temperature ranks 1 to 7, respectively, so that the counter 31 counts the input of the outside temperature rank 1, the counter 32 counts the input of the outside temperature rank 2, and so on.

1 in the figure is a climate/driving condition memory, which stores climate/driving condition data. This data measures outside air temperature at regular intervals within a specific time, classifies the measured outside temperature into the appropriate temperature range from the pre-classified degree range, and counts the classification frequency each time it is classified. However, several relationships between the counted values and the corresponding climate, and relationships between the climate and operating conditions such as snow melting, preheating, and anti-freezing are stored.

Reference numeral 2 denotes an appropriate temperature memory, which stores several relationships between specific operating conditions and appropriate temperatures under those operating conditions.

7 is a climate fist driving condition determination circuit, and counter 3! ~3
The climate and the driving conditions under the climate are determined based on the count value of n and the climate/driving condition data stored in the climate/driving condition memory l. For example, this criterion is determined as follows.

a. If the outside temperature is 11θ℃ or less for 5 or more counts, the climate is A and the operating condition is B.

b. When the outside temperature ranges from -9 to -5°C 10 times, the climate is C and the operating conditions are set.

When the outside temperature of C0 changes from 15 to 0 degrees Celsius 10 times, the climate is E and the operating condition is G.

d. If the outside temperature is 1 to 5 degrees Celsius or more counted 8 times or more, the climate is H and the operating condition is I.

e. For cases other than a to d above, the climate is J and the operating condition is K.

8 is an appropriate temperature determination circuit, which determines the optimum temperature for the snow melting equipment based on the operating conditions input from the climate +1 operating condition determination circuit 7 and the appropriate temperature data stored in the appropriate temperature memory 2. .

The appropriate temperature determination circuit 8 includes a road surface temperature detector 10. Outside temperature detector 11. When respective detection signals are input from the road surface moisture detector 12 and the snowfall detector 13, the optimal temperature of the snow melting device is determined by taking these signals into consideration.

When the outside temperature detected by the outside temperature detector 11 is input to the appropriate temperature determination circuit 8, that outside temperature is added to the climate/driving condition data and the appropriate temperature data.

The determination circuit 8 determines the optimum temperature.

(Effect of the invention) The present invention has the following effects.

(1) The system determines the climate based on the outside temperature and pre-stored climate/driving condition data, then determines the driving conditions in that climate, and then determines the appropriate temperature for that driving condition, which improves accuracy. The high temperature control of the snow melting equipment will improve the quality of the snow melting equipment.

(2) Since the relationship between outside temperature, climate, operating conditions, and appropriate temperature can be combined with excessive drinking, temperature control that matches the actual outside temperature becomes possible.

(3) Operation can be adapted to the climate and outside temperature, so
There is almost no wastage of energy (W), contributing to energy conservation and significantly reducing running costs.

[Brief explanation of the drawing]

The figure is an explanatory diagram of one embodiment of the present invention. 1 is memory for climate IIN conversion conditions 2 is memory for appropriate temperature data 31~3n are counters 4 is outside temperature sensor 5 is a temperature measurement circuit 7 is a climate/operating condition determination circuit 8 is the appropriate temperature judgment circuit

Claims (3)

[Claims] (1) Classify the outside air temperature into specific temperature ranges, classify the outside air temperature measured at regular intervals within a specific time into the corresponding temperature range each time, and calculate the frequency of classification into each temperature range and the climate. Relationships with operating conditions such as snow melting, preheating, and anti-freezing are classified into several ways and stored as climate/operating condition data.
In addition, the relationship between specific operating conditions such as snow melting, preheating, and antifreezing and the appropriate temperature of the snow melting equipment under those operating conditions is classified into several ways and stored as appropriate temperature data, and the outside temperature is the same as the measurement conditions above. or under similar conditions, and classify it into the corresponding temperature range each time, and at least calculate the outside temperature at the time of the measurement based on the frequency of classification into each temperature range, pre-stored climate/operating condition data, and suitable temperature data. 1. A temperature control method for snow melting equipment, characterized in that an appropriate temperature for the snow melting equipment is determined, and the temperature of the snow melting equipment is controlled based on the determination. (2) In addition to the frequency of classification into each temperature range, climate/driving condition data, and optimal temperature data, separately detected road surface temperature data, road surface moisture data, snowfall data, etc. are used singly or in combination. 2. A temperature control method for snow melting equipment according to claim 1, wherein the temperature control method for snow melting equipment is determined by determining the appropriate temperature of the snow melting equipment when measuring the outside temperature. (3) Measured outside air temperature is divided into temperature ranges and input into the counter, climate and operating condition data are stored in the climate and operating condition memory, and appropriate temperature data is stored in the appropriate temperature data memory. A temperature control method for snow melting equipment according to claim 1, characterized in that: