Method for analyzing and judging abrasion life of wiper blade by using historical working current

Abstract

The invention relates to a method for analyzing and judging the wear life of a wiper blade by using historical working current, which comprises the following steps of: 1) acquiring the driving current of a wiper motor in real time by a wiper motor controller when the wiper blade works; 2) taking a driving current average value every 10 minutes, averaging the driving current average value every next 10 minutes with the previously obtained average value of 10 minutes, and calculating the current average value of the current convolution; 3) calculating an accumulated driving current average value, wherein the accumulated average value is equal to the sum of the driving current average value of the last 10 minutes and the current average value of the current convolution; comparing the accumulated driving current average value with an accumulated average value reference value; if the increase exceeds a certain proportion, the wiper blade is considered to have an aging phenomenon, and an alarm is given to prompt replacement. According to the scheme of performing convolution comparison calculation through the working current of the wiper motor, whether the wiper blade is aged or needs to be replaced or not is judged and reminded. The wiper blade can be replaced in time, and driving safety is guaranteed.

Description

Technical Field

[0001] The invention relates to the fields of vehicles, marine vessels, aviation and aerospace, and video surveillance, and in particular to a method for determining the wear life of a wiper blade by analyzing historical working current. Background Art

[0002] The principle of keeping the wiper blade lubricated on its wiping surface is that a lubricating coating such as graphite coating or Teflon coating is attached to the contact surface during production. As the use time increases, a major factor that causes the resistance to become greater and greater is the wear of the wiper blade coating, that is, the aging and hardening of the rubber body until it fails.

[0003] Therefore, it is necessary to provide a method to analyze and determine the wear life of the wiper blade. Summary of the invention

[0004] The purpose of the present invention is to provide a method for judging the wear life of a wiper blade by analyzing the historical working current.

[0005] The present invention achieves the above object through the following technical solutions:

[0006] A method for determining the wear life of a wiper blade by analyzing historical working current comprises the following steps:

[0007] 1) When the wiper blade is working, the wiper motor controller collects the driving current of the wiper motor in real time;

[0008] 2) Take an average driving current every 10 minutes of work, and average the average driving current of the next 10 minutes with the average driving current of the previous 10 minutes to calculate the current average of the current convolution;

[0009] 3) Calculate the cumulative average driving current, the cumulative average = the driving current average of the last 10 minutes + the current average of the current convolution; compare the cumulative driving current average with the cumulative average reference value; if the increase exceeds a certain ratio, it is considered that the wiper blade has aged, and an alarm prompts that it needs to be replaced.

[0010] Furthermore, when the wiper blade is just shipped from the factory or replaced with a new one, the average driving current value in the first 10 minutes of operation is average value A, and the average driving current value in the second 10 minutes of operation is average value B. Then the current convolution average current value = (average value A + average value B) / 2.

[0011] Furthermore, the cumulative driving current average value of the new wiper blade that has worked for 24 hours (settable) is taken as the "cumulative average reference value", for example 500mA; the wiper motor controller will calculate this cumulative driving current average value in real time, and compare it with the "cumulative driving current average reference" of 500mA in the first 24 hours. When the cumulative average value of the last 24 hours increases by more than 30% (settable) compared with the previous 500mA, it is considered that the wiper blade has aged, and an alarm will be issued to prompt that it needs to be replaced.

[0012] Furthermore, after replacement, the reset function can be used to recalculate the "accumulated drive current average value reference value".

[0013] Compared with the prior art, the present invention uses a solution of convolution comparison calculation based on the working current of the wiper motor to judge and remind whether the wiper blade is aged or needs to be replaced, thereby ensuring that the wiper blade is replaced in time and ensuring driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the present invention.

[0015] In the figure, 1. wiper motor controller, 2. wiper motor, 3. wiper blade. DETAILED DESCRIPTION

[0016] See also Figure 1 This embodiment demonstrates a method for determining the wear life of a wiper blade by analyzing the historical working current, and determines and reminds whether the wiper blade is aged or needs to be replaced by performing a convolution comparison calculation on the working current of the wiper motor.

[0017] The specific implementation steps include:

[0018] 1) When the wiper blade 3 is working, the wiper motor controller 1 collects the driving current of the wiper motor 2 in real time;

[0019] 2) Take an average driving current every 10 minutes of work, and average the average driving current of the next 10 minutes with the average driving current of the previous 10 minutes to calculate the current average of the current convolution.

[0020] For example, when the wiper blade is just shipped from the factory or replaced with a new one, the average driving current value in the first 10 minutes of operation is average value A, and the average driving current value in the second 10 minutes of operation is average value B. Then the current average value of the convolution = (average value A + average value B) / 2;

[0021] 3) Calculate the cumulative average driving current, the cumulative average = the driving current average of the last 10 minutes + the current average of the current convolution; compare the cumulative driving current average with the cumulative average reference value; if the increase exceeds a certain ratio, it is considered that the wiper blade has aged, and an alarm prompts that it needs to be replaced.

[0022] The cumulative driving current average value of the new wiper blade after 24 hours of work (settable) is taken as the "cumulative average reference value", for example 500mA; the wiper motor controller will calculate this cumulative driving current average value in real time, and compare it with the "cumulative driving current average reference value" of 500mA in the first 24 hours. When the cumulative average value of the last 24 hours increases by more than 30% (settable) compared with the previous 500mA, it is considered that the wiper blade has aged and an alarm will be issued to prompt that it needs to be replaced.

[0023] After replacement, you can use the reset function to recalculate the "accumulated drive current average value reference value".

[0024] The present invention uses a solution of convolution comparison calculation based on the working current of the wiper motor to judge and remind whether the wiper blade is aged or needs to be replaced, thereby ensuring that the wiper blade is replaced in time and ensuring driving safety.

[0025] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for determining the wear life of a wiper blade by analyzing historical working current, characterized in that: The following steps are involved: 1) When the wiper blade is working, the wiper motor controller collects the driving current of the wiper motor in real time; 2) Take an average driving current every 10 minutes of work, and average the average driving current of the next 10 minutes with the average driving current of the previous 10 minutes to calculate the current average of the current convolution; 3) Calculate the cumulative average driving current, the cumulative average = the driving current average of the last 10 minutes + the current average of the current convolution; compare the cumulative driving current average with the cumulative average reference value; if the increase exceeds a certain ratio, it is considered that the wiper blade has aged, and an alarm prompts that it needs to be replaced.

2. The method for determining the wear life of a wiper blade by analyzing the historical working current according to claim 1, characterized in that: When the wiper blade is just shipped from the factory or replaced with a new one, the average driving current value in the first 10 minutes of operation is average value A, and the average driving current value in the second 10 minutes of operation is average value B. Then the current average value of the convolution = (average value A + average value B) / 2.

3. The method for determining the wear life of a wiper blade by analyzing the historical working current according to claim 1, characterized in that: The average value of the cumulative driving current of the new wiper blade for 24 hours (settable) is taken as the "cumulative average reference value", for example, 500mA; the wiper motor controller will calculate this cumulative driving current average value in real time, and compare it with the "cumulative driving current average reference" 500mA in the first 24 hours. When the cumulative average value of the last 24 hours increases by more than 30% (settable) compared with the previous 500mA, it is considered that the wiper blade has aged and an alarm will be issued to prompt that it needs to be replaced.

4. The method for determining the wear life of a wiper blade by analyzing the historical working current according to claim 1, characterized in that: After replacement, you can use the reset function to recalculate the "reference value of the cumulative drive current average value".

Images