CN114814572A - Door and window locked-rotation detection method - Google Patents
Door and window locked-rotation detection method Download PDFInfo
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- CN114814572A CN114814572A CN202210359506.6A CN202210359506A CN114814572A CN 114814572 A CN114814572 A CN 114814572A CN 202210359506 A CN202210359506 A CN 202210359506A CN 114814572 A CN114814572 A CN 114814572A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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Abstract
The invention discloses a door and window locked rotor detection method which comprises the steps of 1, voltage acquisition, 2, average value and variance calculation, 3, variance comparison, 4, average value comparison and 5, and whether locked rotor exists or not is judged. According to the invention, by changing the door and window stalling algorithm, a user can not cause the door and window to be jammed due to external factors in the actual use process (when the door and window is blocked, the sampling waveform is abnormal), but the actual operation is performed to the top or the bottom to block the rotation.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method for detecting locked rotor of doors and windows.
Background
The door and window controller is used as a traditional automobile standard product and widely applied to various automobile types, and the door and window controller basically drives a door and window motor in an electric control mode at present, and a DCM system is shown in figure 1.
The locked rotor judging method of the existing door and window controller comprises the following steps: after the glass lifter operates, whether the door and window reaches the top or the bottom is judged by collecting the voltage of the driving end, so that whether the door and window continues to be driven is simply judged.
The existing controller stalling mode judging method is simple, and the door and window lifting resistance is too large easily due to aging of door and window glass rubber strips and other reasons in the use process of a vehicle, so that the controller is judged to be stalling, actual stalling can be avoided, and the DCM stops driving the door and window to continue lifting. The glass lifting is blocked, the user experience is poor, and the DCM is mistakenly determined to be invalid.
Disclosure of Invention
In order to overcome the above defects, the present invention aims to provide a door and window locked-rotation detection method, which is used for improving the reliability of the DCM, and by changing the door and window locked-rotation algorithm, a user does not cause the locking of the door and window lifting due to external factors (when the door and window lifting is obstructed, the sampling waveform is abnormal), but the locked-rotation is performed after the actual operation is performed to the top or the bottom.
The technical scheme adopted by the invention is realized as follows:
the door and window locked-rotor detection method comprises the following steps:
step 1, voltage acquisition, namely continuously sampling m voltage values for a driving motor of a door and a window;
step 2, calculating the average value and the variance, and calculating the average value and the variance of the m voltage values;
step 3, comparing the variance with a first preset value, and executing step 4 when the variance is smaller than the first preset value; when the variance is not less than a first preset value, clearing the judgment times, and executing the step 1;
step 4, comparing the average value with a locked rotor threshold value, when the average value is smaller than the locked rotor threshold value, resetting the judgment times, and executing the step 1; when the average value is not less than the locked rotor threshold value, judging the number of times to be accumulated to be 1, and executing the step 5;
step 5, judging whether the locked rotor is blocked or not, comparing the judging times with a second preset value, and executing the step 1 when the judging times are smaller than the second preset value; and when the judgment number is not less than a second preset value, judging that the locked rotor is generated.
Preferably, in step 2, the method for calculating the variance is as follows:
S n =（X n -X）*（X n -X），
S=(S 1 +…+S m )/m，
in the formula: s is the variance, X n The acquired nth voltage value is not more than m, and X is the average value of the acquired m voltage values.
Further, before the step 1, an initialization step is further included, where the initialization step includes clearing the decision number, and presetting a first preset value, a locked rotor threshold value, a second preset value, and a smooth operation value.
With a short, the sampling interval for the consecutive samples is 5-10 ms.
Preferably, m = 4.
Preferably, the number of determinations is 7.
Preferably, the lock-up threshold is 4 to 8 times the smooth-running value.
As another preferable mode, the locked-rotor threshold value is a voltage value of the driving motor at the time of actual measurement of locked-rotor.
Preferably, the smooth operation value is a voltage value of a driving motor actually measured when the door and window is lifted smoothly.
The DCM lift control method can improve the reliability of the DCM, and through changing the door and window rotation blocking algorithm, a user can not cause the door and window to be locked due to external factors in the actual use process (when the door and window is lifted and blocked, the sampling waveform is abnormal), but the rotation blocking is carried out after the actual operation is carried out to the top or the bottom.
Therefore, the invention can improve the reliability of the door and window controller, and can optimize through the internal algorithm of the door and window controller under the condition of external factor interference to prevent the interference condition.
Drawings
FIG. 1 is a schematic diagram of DCM.
FIG. 2 is a flow chart of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 2, the present embodiment discloses a method for detecting a locked rotor of a door or a window, including the following steps:
step 1, voltage acquisition, namely continuously sampling m voltage values for a driving motor of a door and a window;
step 2, calculating the average value and the variance, and calculating the average value and the variance of the m voltage values;
step 3, comparing the variance with a first preset value, and executing step 4 when the variance is smaller than the first preset value; when the variance is not less than a first preset value, clearing the judgment times, and executing the step 1;
step 4, comparing the average value with a locked rotor threshold value, when the average value is smaller than the locked rotor threshold value, resetting the judgment times, and executing the step 1; when the average value is not less than the locked rotor threshold value, judging the number of times to be accumulated to be 1, and executing the step 5;
step 5, judging whether the rotor is locked, comparing the judging times with a second preset value, and executing the step 1 when the judging times are smaller than the second preset value; and when the judgment number is not less than a second preset value, judging that the locked rotor is generated.
In the embodiment, a method for judging door and window locked rotor is improved in the existing DCM system, and for the system, an initialization step is further included before the step 1, wherein the initialization step comprises zero clearing judgment times, and a first preset value, a locked rotor threshold value, a second preset value and a stable operation value are preset; and judging times, presetting a first preset value, a locked rotor threshold value, a second preset value and a smooth running value, and configuring corresponding storage units or register units.
The specific method for calculating the variance is as follows:
S n =（X n -X）*（X n -X），
S=(S 1 +…+S m )/m，
in the formula: s is the variance, X n The acquired nth voltage value is not more than m, and X is the average value of the acquired m voltage values.
Example 2
On the basis of embodiment 1, the present embodiment discloses a specific set of parameters, including:
1. the sampling interval of continuous sampling is 5-10 ms;
2. m =4, the number of determinations is 7;
3. the steady operation value is the voltage value of the driving motor actually measured when the door and window smoothly ascends and descends, and the voltage value of the driving motor can be read as the steady operation value through the display of the existing DCM system when the door and window smoothly ascends and descends under the normal condition; the locked-rotor threshold may be 4-8 times the stationary value, i.e., the locked-rotor threshold is set to a multiple of the stationary value.
Example 3
The difference between this embodiment and embodiment 2 is that the locked-rotor threshold value is the voltage value of the driving motor during locked-rotor measured, and when locked-rotor occurs at the top or bottom of the door/window lift value, the voltage value of the driving motor is read as the locked-rotor threshold value through the display of the existing DCM system, or the voltage value may be weighted as the locked-rotor threshold value.
Other parts of this embodiment are the same as embodiment 2, and thus are not described in detail.
The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.
Claims (9)
1. The method for detecting the locked rotation of the door and the window is characterized by comprising the following steps of:
step 1, voltage acquisition, namely continuously sampling m voltage values for a driving motor of a door and a window;
step 2, calculating the average value and the variance, and calculating the average value and the variance of the m voltage values;
step 3, comparing the variance with a first preset value, and executing step 4 when the variance is smaller than the first preset value; when the variance is not less than a first preset value, clearing the judgment times, and executing the step 1;
step 4, comparing the average value with a locked rotor threshold value, when the average value is smaller than the locked rotor threshold value, resetting the judgment times, and executing the step 1; when the average value is not less than the locked rotor threshold value, judging the number of times to be accumulated to be 1, and executing the step 5;
step 5, judging whether the locked rotor is blocked or not, comparing the judging times with a second preset value, and executing the step 1 when the judging times are smaller than the second preset value; and when the judgment number is not less than a second preset value, judging that the locked rotor is generated.
2. The door and window locked-rotor detection method according to claim 1, wherein in step 2, the variance is calculated as follows:
S n =（X n -X）*（X n -X），
S=(S 1 +…+S m )/m，
in the formula: s is the variance, X n The acquired nth voltage value is not more than m, and X is the average value of the acquired m voltage values.
3. The door and window locked-rotor detection method according to claim 1, further comprising an initialization step before step 1, wherein the initialization step includes zero clearing determination times, presetting a first preset value, a locked-rotor threshold value, a second preset value, and a smooth operation value.
4. The method for detecting locked rotation of doors and windows according to any one of claims 1 to 3, wherein the sampling interval of the continuous sampling is 5 to 10 ms.
5. The method for detecting rotation blockage of a door and window as claimed in claim 4, wherein m = 4.
6. The method for detecting rotation blockage of a door or window according to claim 4, wherein the number of determinations is 7.
7. The door and window rotation blockage detection method according to claim 4, characterized in that: the locked-rotor threshold value is 4-8 times of the steady operation value.
8. The door and window locked-rotor detection method according to claim 4, characterized in that: the locked rotor threshold value is the voltage value of the driving motor during locked rotor measured actually.
9. The door and window rotation blockage detection method according to claim 7 or 8, characterized in that: the stable operation value is the actually measured voltage value of the driving motor when the door and window is lifted smoothly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210359506.6A CN114814572A (en) | 2022-04-07 | 2022-04-07 | Door and window locked-rotation detection method |
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| CN202210359506.6A CN114814572A (en) | 2022-04-07 | 2022-04-07 | Door and window locked-rotation detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117233664A (en) * | 2023-11-13 | 2023-12-15 | 成都创科升电子科技有限责任公司 | Open circuit detection method and system for micro-current circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117233664A (en) * | 2023-11-13 | 2023-12-15 | 成都创科升电子科技有限责任公司 | Open circuit detection method and system for micro-current circuit |
| CN117233664B (en) * | 2023-11-13 | 2024-02-02 | 成都创科升电子科技有限责任公司 | Open circuit detection method and system for micro-current circuit |
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