English to Chinese: Method applicable to a progressive control of the heating of heating elements General field: Tech/Engineering Detailed field: Electronics / Elect Eng
Source text - English Method applicable to a progressive control of the heating of heating elements
Scope of the invention
The present invention refers to a method applicable to a control of the heating of heating elements, particularly applicable to a seat of an automotive vehicle, operating in a progressive manner and adapted to the element object of control and to its state at all times.
Background of the invention
US patent 6,252,208 discloses a method and a circuit for controlling the heating current of a seat heater according to the temperature. The same patent proposes a scheme very similar to the one proposed in the present application, but with a much simpler and less realistic control method, since it is based on varying the control signals to be applied to the heating element from a fixed table saved in ROM memory, which relates application time values of said signals with temperature values monitored through a temperature sensor arranged in said heater.
US patent 3,768,156 discloses a method for manufacturing heating panels very similar to those used in the present patent application, based on the use of electric conducting polymers, to form a flexible resistive and electricity-conducting element, to which element a voltage is applied through two electrodes connected to it with the object of heating the heating panel. In said patent, although it indicates that the temperature of the panel could be controlled by means of including a thermostat, it does not propose a method for carrying out said control.
In the background documents mentioned, no sufficiently reliable or realistic method for controlling the heating of said elements is provided, since that which is explained in sad US patent 6,252,208 does not take into account that the heating elements can be different or, especially, have different physical features throughout their useful life, and that these can be modified, particularly in the case of their application in the seat of an automotive vehicle, their features and performances can significantly vary according to the weight, position and span of the person using the seat and also according to the surrounding environment thereof.
It is therefore interesting to provide a more reliable option for controlling the temperature of said heating element. It is better in that it has a more realistic vision thereof, taking into account its possible variations of form, depending on the pressure applied on it and the distribution thereof, the variation of its resistive and conductive features, depending on external parameters belonging to the surrounding environment thereof, such as the temperature of the area in which the heating element is arranged, as well as the fact that different materials can be used and arranged such that they form different structures, thus forming different heating elements which obviously will not react in the same way due to the same control signal.
Brief explanation of the invention
The method proposed in this patent application does not overlook all the aforementioned, and to do this it adapts the control signal to be applied to the heating element, personalizing it for each one and in each instant, i.e. this control signal is generated by means of a study of the progression of the state in which the heating element is in at all times, which is carried out from the monitoring of the temperature thereof through a temperature sensor arranged for that purpose on the heating element.
According to the present invention, the method for progressively controlling the heating of different heating elements, particularly applicable to a seat of an automotive vehicle, is of the type in which said control is carried out by means of an electronic circuit functioning by means of Pulse Width Modulation (PWM), based on the temperature monitored in said heating element. Said method is characterized in that the signals to be applied to the heating element are progressively adapted to the features of the different heating elements, at all times and throughout the life thereof, said adaptation being obtained by means of the variation of the working cycle of a voltage signal to be applied to the heating element in the form of a fixed frequency pulse train, and applying said signal after an initial transient state during which a maximum voltage has been applied to the heating element.
Brief description of the drawings
The aforementioned features and others of the invention will become clear from the following description of an embodiment example shown in the attached drawings and which is to be taken as an illustrative and non-limiting example.
In the attached drawings:
Figure 1 shows a graphic representation of the signal to be applied to the heating element, in the form of voltage over time, by means of the method object of the present invention,
Figure 2 shows, by means of a graph, the progression of the temperature in a heating element due to different control signals,
Figure 3 shows, for an embodiment example, an electronic circuit representing an assembly susceptible to applying the method of the present invention.
Figure 4 shows another embodiment example of an assembly susceptible to applying the method of the present invention.
English to Chinese: The Living Mountain (Excerpt) General field: Art/Literary Detailed field: Geography
Source text - English The Plateau
Summer on the high plateau can be delectable as honey; it can also be a roaring scourge. To those who love the place, both are good, since both are part of its essential nature. And it is to know its essential nature that I am seeking here. To know, that is, with the knowledge that is a process of living. This is not done easily nor in an hour. It is a tale too slow for the impatience of our age, not of immediate enough import for tis desperate problems. Yet it has its own rare value. It is, for one thing, a corrective of glib assessment: one never quite knows the mountain, nor oneself in relation to it. However often I walk on them, these hills hold astonishment for me. There is no getting accustomed to them.
The Cairngorm Mountains are a mass of granite thrust up through the schists and gneiss that form the lower surrounding hills, planed down by the ice cap, and split, shattered and scooped by frost, glaciers and the strength of running water. Their physiognomy is in the geography books—so many square miles of area, so many lochs, so many summits of over 4000 feet—but this is a pallid simulacrum of their reality, which, like every reality that matters ultimately to human beings, is a reality of the mind.
Th plateau is the true summit of these mountains; they must be seen as a single mountain, and the individual tops, Ben MacDui, Braeriach and the rest, though sundered from one another by fissures and deep descents, are no more than eddies on the plateau surface. One does not look upwards to spectacular peaks but downwards from the peaks to spectacular chasms. The plateau itself is not spectacular. It is bare and very stony, and since there is nothing higher than itself (except for the tip of Ben Nevis) nearer than Norway, it is savaged by the wind. Snow covers it for half the year and sometimes, for as long as a month at a time, it is in clouds. Its growth is moss and lichen and sedge, and in June the clumps of Silence—moss campion—flower in brilliant pink. Dotterel and ptarmigan nest upon it, and springs ooze from its rock. By continental measurement its height is nothing much—around 4000 feet—but for an island it is well enough, and if the winds have unhindered range, so has the eye. It is island weather too, with no continent to steady it, and the place has as many aspects as there are gradations in the light.
Light in Scotland has a quality I have not met elsewhere. It is luminous without being fierce, penetrating to immense distances with an effortless intensity. So on a clear day one looks without any sense of stain from Morven in Caithness to the Lammermuirs, and out past Ben Nevis to Morar. At midsummer, I have had to be persuaded I was not seeing further even than that. I could have sworn I saw a shape, distinct and blue, very clear and small, further off than any hill the chart recorded. The chart was against me, my companions were against me, I never saw it again. On a day like that, height goes to one’s head. Perhaps it was the lost Atlantis focused for a moment out of time.
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