A kind of fan speed detection method in charging pile
A technology of fan speed and detection method, which is applied in electric vehicle charging technology, linear/angular velocity measurement, speed/acceleration/impact measurement, etc. It can solve the problems that affect the normal calculation of the square wave cycle and cannot accurately detect the fan speed of the charging pile. , to achieve the effect of avoiding adverse effects and avoiding large errors in wind speed feedback signal acquisition
Active Publication Date: 2022-06-03
NINGBO SANXING INTELLIGENT ELECTRIC
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[0005] However, in the actual fan speed feedback design, due to the glitches that may occur during the circuit design or the square wave transition process, the interrupt is falsely triggered, which affects the normal calculation of the square wave period, and ultimately cannot accurately detect the voltage in the charging pile. Fan speed
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[0049] The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.
[0050] see figure 1As shown, this embodiment provides a method for detecting the rotational speed of a fan in a charging pile, including the following steps:
[0051] Step 1, after the data processing module in the charging pile is started, the signal level of the fan is collected according to the cycle; wherein, the cycle here is 60us;
[0052] Step 2: According to the pre-acquired fan speed range of 1000-5000 rpm and the general formula of the fan speed, the acquisition period of the signal level is obtained; wherein, the general formula of the fan speed is:
[0053] RPM=60 / 2T, RPM is the fan speed, T is the square wave signal period of the fan speed feedback;
[0054] Step 3, transferring the collected signal level data to the data processing module in the charging pile;
[0055] Step 4, the data processing module stores the signal leve...
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The invention relates to a method for detecting the speed of a fan in a charging pile. By periodically collecting the signal level of the fan and initializing and processing the collected signal level data, an 8-bit counter [1] and a 16-bit counter with initial values are obtained. [2], flag [3] and 8-bit counter [4], then judge whether the value of flag [3] is 0 or 1, and obtain the square wave signal between high level and low level Changes, reset the value of the flag [3] and add 1 to the value of the 8-bit counter [4] according to the situation, and then record the start time when the value of the 8-bit counter [4] changes from 0 to 1, according to Calculate the square wave period based on the difference between the current time and the recorded start time, and finally obtain the actual fan speed in the charging pile according to the obtained square wave period and the general formula of the fan speed, so as to avoid external factors during the square wave signal input process The resulting burr signal, so as to obtain a more accurate actual square wave period and fan speed.
Description
technical field [0001] The invention relates to the field of charging piles, in particular to a method for detecting the rotational speed of a fan in a charging pile. Background technique [0002] In recent years, with the improvement of people's living standards, the penetration rate of private cars is getting higher and higher. Electric vehicles powered by electricity, as a late-stage star, have many benefits such as environmental protection, quietness, fast speed and money saving. At the same time, charging pile products compatible with electric vehicles are also being launched. [0003] At present, people's requirements for the charging speed of charging piles are getting higher and higher. In order to shorten the charging time and improve the charging efficiency, it is necessary to continuously increase the charging power of the charging pile. The faster the charging speed, the more heat the charging pile generates, which is undoubtedly a huge test for the cooling sys...
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IPC IPC(8): G01P3/489
CPCG01P3/489Y02T90/12
Inventor 汝黎明潘焱许钢郭永亮
Owner NINGBO SANXING INTELLIGENT ELECTRIC