A control method for bridge cable heating and anti-icing
A control method and electric heating technology, which are applied in the direction of using electric mode for temperature control, etc., can solve the problems of inconvenient maintenance, large installation capacity, and high working energy consumption in the later period, and achieve the effect of anti-icing effect.
Active Publication Date: 2017-05-31
HUNAN UNIV OF SCI & TECH +2
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This method has the disadvantages of large installed capacity, inconvenient maintenance, and high energy consumption.
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[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0025] Such as figure 1 Shown, the steps of the present invention are as follows:
[0026] Step 1: Set a temperature sensor on the bridge deck to collect the bridge deck temperature in real time;
[0027] Step 2: Calculate the rate of change of bridge deck temperature according to the sampling period of the temperature sensor, the bridge deck temperature at the previous moment and the real-time bridge deck temperature collected by the bridge deck temperature sensor;
[0028] The formula for calculating the rate of change of bridge deck temperature dt / dτ is as follows:
[0029] dt / dτ=(t-t 0 ) / T
[0030] where t is the bridge deck temperature, t 0 is the bridge deck temperature at the previous moment, and T is the sampling period of the temperature sensor.
[0031] Step 3: Predict the time required for the actual temperature of the bridge deck to ri...
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The invention discloses an anti-ice heating control method of a bridge cable, which comprises the steps that a temperature sensor is disposed on a bridge deck so as to collect bridge deck temperatures in real time; a variation rate of the bridge deck temperatures is calculated according to a sampling period of the temperature sensor, the bridge deck temperature at a previous moment and the real-time bridge deck temperature collected by the bridge deck temperature sensor; duration needed by the actual bridge deck temperature to increase to decrease to an anti-ice control set temperature is predicted according to the variation rate of the bridge deck temperatures; and according to the needed duration obtained according to the bridge deck temperature variation rate, the bridge deck temperature and the third step, starting, stopping and a to-be-input electric heating power of an electric heating system are controlled. The anti-ice heating control method of the bridge cable disclosed by the invention controls the starting, the stopping and the to-be-input electric heating power of the electric heating system according to the bridge deck temperature variation rate, the bridge deck temperature and the duration needed by the actual bridge deck temperature to increase to decreases to the anti-ice control set temperature so as to make sure that the bridge deck temperature is higher than a water freezing point temperature all the time and thus realize an anti-ice effect.
Description
technical field [0001] The invention belongs to the field of transportation safety, and in particular relates to a heating and anti-icing control method for bridge cables. Background technique [0002] Every winter, there will be freezing, rainy and snowy weather in most parts of our country. Due to the special environment of bridges and tunnel entrances on expressways, the icing phenomenon will be more serious. At this time, cars driving on such roads It is easy to cause serious traffic safety accidents due to wheel slippage. The traditional deicing methods mainly include mechanical deicing method, traditional deicing agent deicing method, cable heating deicing method and thermal pipeline anti-icing method. [0003] Although the mechanical deicing method has the advantages of high efficiency and strong mobility, the cost of machinery is high. Due to the need for manual operation under severe weather conditions, there are great potential safety hazards. The road needs to be...
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IPC IPC(8): G05D23/19
CPCG05D23/19
Inventor 李孔清张登春邹声华洪娜章照宏
Owner HUNAN UNIV OF SCI & TECH