Method for starting and stopping motorized roller blind and motorized roller blind using the same

Abstract

The application discloses an electric roller shutter start-stop method and an electric roller shutter applying the same. The method comprises the following steps: S1, recording the overall weight of the electric roller shutter when the electric roller shutter is static as a standard weight; S2, during the operation of the electric roller shutter, when external force acts on the lifting curtain of the electric roller shutter, if the external force causes the overall weight of the electric roller shutter to increase or decrease to outside the normal fluctuation range relative to the standard weight, the electric roller shutter stops operating; S3, after the electric roller shutter is stopped, when external force acts on the descending direction or the ascending direction of the lifting curtain, if the external force causes the overall weight of the electric roller shutter to increase or decrease to outside the normal fluctuation range relative to the standard weight, the electric roller shutter travels in the direction of the external force. The method can effectively judge the stress condition of the electric roller shutter, and effectively realize the start-stop of the electric roller shutter according to different working conditions, so as to meet different control requirements of the electric roller shutter.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of doors and windows, in particular to an electric roller shutter start-stop method and an electric roller shutter applying the same. BACKGROUND

[0002] The existing electric roller shutter generally uses a tubular motor as a power source. In order to meet the safety requirements, the current method is to detect the current of the tubular motor to determine whether the electric roller shutter is blocked. Once the tubular motor has a certain degree of current fluctuation during operation, the electric roller shutter stops running to avoid safety accidents.

[0003] However, the above detection strategy has certain disadvantages. Since the tubular motor has a large deceleration, when the lifting curtain is descending, especially for the case of less weight on the lower beam, the power required by the tubular motor during the descending process is small, and at this time, the current thereof is approximately equal to the idling current. After encountering a force in the same direction as the force acting on the tubular motor, the current of the tubular motor is difficult to change significantly, thereby causing the force judgment to fail, and then the point touch start-stop condition cannot be met, resulting in that the existing electric roller shutter cannot be well controlled manually. SUMMARY

[0004] The present application aims to provide an electric roller shutter start-stop method to solve one or more technical problems in the prior art and at least provide a beneficial choice or create conditions.

[0005] The electric roller shutter start-stop method according to the first aspect of the present application comprises the following steps:

[0006] S10. The overall weight of the electric roller shutter is detected by a gravity sensor, and the overall weight of the electric roller shutter at rest is recorded as a standard weight;

[0007] S20. During the operation of the electric roller shutter, when an external force acts on the lifting curtain of the electric roller shutter, if the external force causes the overall weight of the electric roller shutter to increase or decrease beyond the normal fluctuation range relative to the standard weight, the electric roller shutter stops running, otherwise the electric roller shutter keeps running;

[0008] S30. After the electric roller shutter is stopped, when an external force acts on the descending direction or the ascending direction of the lifting curtain, if the external force causes the overall weight of the electric roller shutter to increase or decrease beyond the normal fluctuation range relative to the standard weight, the electric roller shutter moves in the direction of the external force, otherwise the electric roller shutter keeps stopped.

[0009] According to the motorized roller shutter start-stop method, the overall weight of the motorized roller shutter can be detected by the gravity sensor when the motorized roller shutter is running, whether the lifting curtain is provided with resistance or power, and the motorized roller shutter can execute different commands according to the ratio of the actual overall weight to the standard weight, so as to realize the functions of the in-place stop, the stop when encountering resistance and the manual stop of the motorized roller shutter. After the motorized roller shutter is stopped, the lifting curtain can be pulled down to realize the point touch start of the lifting curtain in the downward direction, or the lifting curtain can be lifted to realize the point touch start of the lifting curtain in the upward direction. Compared with the prior art, the method can effectively judge the stress condition of the motorized roller shutter, and effectively realize the start and stop of the motorized roller shutter according to different working conditions, so as to meet different control requirements of the motorized roller shutter.

[0010] According to some embodiments of the application, since the step S20 and the step S30 do not have a hierarchical relationship, the order of the step S20 and the step S30 can be interchanged.

[0011] According to some embodiments of the application, the controller of the motorized roller shutter intermittently reads the parameters detected by the gravity sensor, so as to keep monitoring the overall weight of the motorized roller shutter.

[0012] According to some embodiments of the application, specifically, the reading interval time of the controller is 0.5-2 seconds.

[0013] According to some embodiments of the application, in the step S20, if the motorized roller shutter stops running due to external force when the motorized roller shutter is running in the downward direction, the motorized roller shutter drives the lifting curtain to run in the upward direction for a certain distance before the motorized roller shutter stops running, so as to ensure that the lifting curtain is in the vertical state.

[0014] According to some embodiments of the application, the motorized roller shutter has a limit calibration mode, and when the motorized roller shutter enters the limit calibration mode, the upper limit and the lower limit of the motorized roller shutter are calibrated by the gravity sensor, so as to calibrate the upper and lower limits of the motorized roller shutter.

[0015] According to some embodiments of the present application, in order to realize the automatic calibration of the upper and lower limits of the motorized roller shutter, the motorized roller shutter drives the lifting curtain to move upwards to the upper limit point, at which the lifting curtain abuts against the limit baffle, causing the overall weight of the motorized roller shutter to increase beyond the normal fluctuation range with respect to the standard weight, the motorized roller shutter stops running, and the current position of the lifting curtain is set as the upper limit, and then the motorized roller shutter drives the lifting curtain to move downwards to the lower limit point, at which the lifting curtain abuts against the ground, causing the overall weight of the motorized roller shutter to decrease beyond the normal fluctuation range with respect to the standard weight, the motorized roller shutter stops running, and the current position of the lifting curtain is set as the lower limit.

[0016] According to some embodiments of the present application, the motorized roller shutter records the distance between the upper limit and the lower limit as a travel range, and in the next limit calibration process, the upper limit of the motorized roller shutter is recalibrated, and the lower limit of the motorized roller shutter is determined according to the newly calibrated upper limit and the travel range, so as to simplify the subsequent calibration process of the upper and lower limits of the motorized roller shutter.

[0017] According to some embodiments of the present application, the motorized roller shutter is remotely controlled by a control panel and / or a remote controller, so as to realize the electric control of the motorized roller shutter.

[0018] The motorized roller shutter according to the second aspect of the embodiments of the present application applies the above-mentioned motorized roller shutter start-stop method.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0021] Figure 1 is a perspective structural schematic view of the motorized roller shutter according to the embodiments of the present application;

[0022] Figure 2 is a local enlarged view of the motorized roller shutter at A according to the embodiments of the present application.

[0023] In the drawings: 100 - tubular motor, 200 - lifting curtain, 110 - winding drum, 300 - gravity sensor, 410 - first mounting plate, 420 - second mounting plate, 310 - elastic body, 320 - strain gauge, 311 - through hole, 210 - end seal. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0026] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this invention, unless otherwise explicitly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0028] like Figure 1 and Figure 2 As shown, according to Embodiment 1 of the present invention, an electric roller blind includes a tubular motor 100 and a lifting curtain 200. The tubular motor 100 can utilize the structure of existing technology. The tubular motor 100 mainly includes a stroke section, a motor, and a reduction section. The stroke section, motor, and reduction section are all housed within a roller drum 110 for operation. The reduction section increases the torque of the motor through a planetary reduction mechanism, while the stroke section limits the upper and lower limits of the motor. When the motor starts, it drives the roller drum 110 to rotate forward or backward via the reduction section.

[0029] In addition, the lifting curtain 200 can be a plastic component or a metal component, one end of which is fixedly connected to the outer circumferential surface of the winding drum 110 and movably connected to the winding drum 110 in a winding manner. Whenever the winding drum 110 rotates, the lifting curtain 200 moves in an extending or retracting manner to realize the winding or unwinding of the lifting curtain 200. The upper limit position of the motor is the angular displacement when the lifting curtain 200 is completely wound on the winding drum 110, and the lower limit position of the motor is the angular displacement when the lifting curtain 200 is lowered to abut against the ground.

[0030] Although the stroke part can control the upper and lower limit positions of the motor, it cannot calibrate the upper and lower limit positions of the motor. Once the upper and lower limit positions of the motor deviate, the tubular motor 100 needs to be disassembled for repair. In order to solve the above technical problems, the electric roller shutter further comprises a gravity sensor 300, the number of the gravity sensor 300 is one, which is installed on one of the end surfaces of the tubular motor 100. The two ends of the tubular motor 100 are originally fixedly connected to the wall body through the first mounting plate 410 and the second mounting plate 420. If the tubular motor 100 is provided with the gravity sensor 300, the gravity sensor 300 is installed between the tubular motor 100 and one of the mounting plates. The gravity sensor 300 is used to detect the size of the force acting on the tubular motor 100. For example, when the lifting curtain 200 is pulled down, the weight of the overall system increases, at this time the size of the force is positive. For example, when the lifting curtain 200 is lifted, the weight of the overall system decreases, at this time the size of the force is negative.

[0031] Specifically, the gravity sensor 300 comprises an elastic body 310, a collection circuit (not shown in the figure) and a plurality of strain gauges 320. The elastic body 310 can be a metal block, a plurality of through holes 311 are formed in the length direction of the metal block to improve the elastic coefficient of the elastic body 310. One end of the elastic body 310 is fixedly connected to one end surface of the tubular motor 100 through a screw, and the other end of the elastic body 310 is fixedly connected to the corresponding second mounting plate 420 through a screw, so that the two ends of the elastic body 310 can be kept relatively stationary with the tubular motor 100 and the second mounting plate 420 respectively. Once the displacement between the tubular motor 100 and the wall body occurs, the elastic body 310 can be deformed.

[0032] In order to detect the force acting on the tubular motor 100, a plurality of strain gauges 320 are attached to the surface of the elastic body 310. In this embodiment, there are four strain gauges 320, two of which are attached to one side of the elastic body 310, and the other two are attached to the opposite side of the elastic body 310. The strain gauges 320 are resistance sensitive elements that generate different resistance values according to the deformation of the elastic body 310. The acquisition circuit converts the corresponding resistance values into voltage values, and the output electrical signal of the acquisition circuit is a vector with directionality. The controller of the tubular motor 100 is electrically connected to the acquisition circuit of the gravity sensor 300 to control the start and stop of the tubular motor 100 through the force feedback of the gravity sensor 300.

[0033] Since the bottom of the lifting curtain 200 is provided with an end seal 210 with a slightly larger size, and the top of the motorized roller blind is provided with a limiting baffle (not shown in the figure) for abutting against the end seal 210, when the tubular motor 100 drives the lifting curtain 200 to rise to be completely wound on the winding drum 110, the end seal 210 abuts against the limiting baffle to define the upper limit point of the lifting curtain 200. Similarly, when the tubular motor 100 drives the lifting curtain 200 to descend to abut against the ground, the lifting curtain 200 is at the lower limit point at this time.

[0034] The motorized roller blind has a limiting calibration mode. When the motorized roller blind enters the limiting calibration mode, the tubular motor 100 drives the lifting curtain 200 to rise to the upper limit point under the premise that the lifting curtain 200 is not subjected to any external force. Since the winding degree of the lifting curtain 200 is limited by the limiting baffle, it is equivalent to a resistance against the rising of the lifting curtain 200, which increases the weight of the tubular motor 100. Once the gravity sensor 300 detects the weight change, and the weight change exceeds the normal fluctuation range, the controller controls the tubular motor 100 to stop running, at which time the tubular motor 100 sets the current angular displacement as the upper limit position of the stroke. Subsequently, the tubular motor 100 drives the lifting curtain 200 to descend to the lower limit point. Since the unwinding degree of the lifting curtain 200 is limited by the ground, it is equivalent to a resistance against the descending of the lifting curtain 200, which reduces the weight of the tubular motor 100. Once the gravity sensor 300 detects the weight change, and the weight change exceeds the normal fluctuation range, the controller controls the tubular motor 100 to stop running, at which time the tubular motor 100 sets the current angular displacement as the lower limit position of the stroke.

[0035] It is to be noted that if the overall weight of the motorized roller blind in the static state is taken as the standard weight, the normal fluctuation range of the overall weight of the motorized roller blind can be selected to be 10% up and down based on the standard weight. When the overall weight of the motorized roller blind is within ±10% of the standard weight, the tubular motor 100 remains in the original working state.

[0036] Through the above arrangement, the tubular motor 100 can calibrate the upper and lower limit positions by the gravity sensor 300 without the need to internally dispose the stroke part, thereby achieving maintenance and repair of the motorized roller blind in a simple manner.

[0037] Further, after the calibration of the upper and lower limit positions of the tubular motor 100 is completed, the controller records the distance between the upper limit position and the lower limit position as the stroke range. If the limit position accuracy of the tubular motor 100 is affected by external factors, the motorized roller blind is re-entered into the limit calibration mode, the upper limit position of the tubular motor 100 is re-calibrated, and the controller determines the lower limit position of the tubular motor 100 according to the newly calibrated upper limit position and the stroke range, thereby simplifying the subsequent calibration process of the upper and lower limit positions of the tubular motor 100.

[0038] In some embodiments of the present application, in order to reduce the influence of temperature on the strain gauge 320, the four strain gauges 320 are connected together to form an H-bridge circuit, which can correct the error introduced due to the temperature change of the strain gauge 320. Since the H-bridge circuit is a common technical means in the sensor field, the working principle thereof will not be described in detail herein.

[0039] The motorized roller blind start-stop method according to the second aspect of the present application is used for the motorized roller blind according to the first aspect of the present application, and further includes the following steps:

[0040] S100. The overall weight of the motorized roller blind is detected by the gravity sensor 300, and the controller records the overall weight of the motorized roller blind in the static state as the standard weight. The controller intermittently reads the parameters detected by the gravity sensor 300 at a frequency of 0.5 seconds to 2 seconds each time, so as to maintain monitoring of the overall weight of the motorized roller blind.

[0041] S200. During the operation of the motorized roller shutter, when an external force acts on the lifting curtain 200 of the motorized roller shutter, no matter whether the external force is caused by a limited position, an intermediate obstruction or a manual intervention, if the external force causes the overall weight of the motorized roller shutter to increase or decrease to outside the normal fluctuation range relative to the standard weight, the motorized roller shutter stops operation to realize the functions of position stop, obstruction stop and manual stop of the motorized roller shutter, otherwise the motorized roller shutter keeps operating.

[0042] Specifically, when the tubular motor 100 drives the lifting curtain 200 to go down or up, no matter whether a resistance or a power is provided in the down direction or the up direction of the lifting curtain 200, the elastic body 310 of the gravity sensor 300 can be deformed, the strain sheet 320 generates different resistance values according to the deformation of the elastic body 310, the acquisition circuit converts the corresponding resistance values into voltage values, the voltage generated by the acquisition circuit is fed back to the controller of the tubular motor 100 and is converted into corresponding current values by the controller, and the tubular motor 100 performs different actions according to the different difference values (i.e. the overall weight change value of the motorized roller shutter) of the front and back current values, when the difference value is within the preset range, the controller controls the tubular motor 100 to continue operating, and when the difference value is outside the preset range, the controller controls the tubular motor 100 to stop operating.

[0043] S300. After the motorized roller shutter is stopped, when an external force acts on the down direction of the lifting curtain 200, if the external force causes the overall weight of the motorized roller shutter to increase to outside the normal fluctuation range relative to the standard weight, the tubular motor 100 drives the lifting curtain 200 to go down, otherwise the tubular motor 100 keeps stopping; or when an external force acts on the up direction of the lifting curtain 200, if the external force causes the overall weight of the motorized roller shutter to decrease to outside the normal fluctuation range relative to the standard weight, the tubular motor 100 drives the lifting curtain 200 to go up, otherwise the tubular motor 100 keeps stopping. Through the above setting, the user can realize the point touch start of the lifting curtain 200 by pulling down the lifting curtain 200 to realize the down of the lifting curtain 200, or realize the point touch start of the lifting curtain 200 by lifting up the lifting curtain 200 to realize the up of the lifting curtain 200, so as to meet different control requirements of the motorized roller shutter.

[0044] It should be noted that since there is no hierarchical relationship between step S200 and step S300, the order of step S200 and step S300 can be interchanged.

[0045] In some embodiments of the present application, the controller preferably intermittently reads the parameter detected by the gravity sensor 300 at a frequency of 1 second each time during step S100.

[0046] In some embodiments of the present application, if the motorized roller stops running due to external force when descending, the tubular motor 100 drives the lifting curtain 200 to ascend a distance of preferably 1 cm before the motorized roller stops running during step S200, so as to ensure that the lifting curtain 200 is in a vertical state and to avoid the safety risk of the lifting curtain 200 being pressed by individuals below.

[0047] In some embodiments of the present application, the motorized roller can also be remotely controlled by a control panel and / or a remote controller to realize the electric control of the motorized roller.

[0048] Further, a lock button is additionally provided in the electric control of the motorized roller, which can shield the manual touch start of the motorized roller to enhance the anti-theft performance. Alternatively, when the tubular motor 100 is at the lower limit position, the controller can temporarily shield the manual touch start of the motorized roller to enhance the anti-theft performance.

[0049] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A motorized roller shade start-stop method, characterized in that, The method comprises the following steps: S10. The overall weight of the motorized roller shutter is detected by a gravity sensor (300), and the overall weight of the motorized roller shutter at rest is recorded as a standard weight; S20. During operation of the motorized roller shutter, when an external force acts on the lifting curtain (200) of the motorized roller shutter, if the external force causes the overall weight of the motorized roller shutter to increase or decrease beyond the normal fluctuation range relative to the standard weight, the motorized roller shutter stops running, otherwise the motorized roller shutter keeps running; S30. After the motorized roller shutter is turned off, when an external force acts on the lifting curtain (200) in the downward direction or the upward direction, if the external force causes the overall weight of the motorized roller shutter to increase or decrease beyond the normal fluctuation range relative to the standard weight, the motorized roller shutter moves in the direction of the external force, otherwise the motorized roller shutter keeps turned off; The motorized roller shutter has a limit calibration mode, when the motorized roller shutter enters the limit calibration mode, the upper limit and the lower limit of the motorized roller shutter are calibrated by the gravity sensor (300) under the premise that the lifting curtain (200) is not subjected to any external force.

2. The motorized roller shade start-stop method of claim 1, wherein: The sequence of steps S20 and S30 can be interchanged.

3. The motorized roller shade start-stop method of claim 1, wherein: The controller of the motorized roller shutter intermittently reads the parameters detected by the gravity sensor (300).

4. The motorized roller shade start-stop method of claim 3, wherein: The reading interval of the controller is 0.5-2 seconds.

5. The motorized roller shade start-stop method of claim 1, wherein: In step S20, if the motorized roller shutter stops running due to an external force when descending, the motorized roller shutter drives the lifting curtain (200) to ascend for a certain distance before stopping running.

6. The motorized roller shade start-stop method of claim 1, wherein: The motorized roller shutter drives the lifting curtain (200) to ascend to the upper limit point, at which the lifting curtain (200) abuts against the limit baffle to cause the overall weight of the motorized roller shutter to increase beyond the normal fluctuation range relative to the standard weight, the motorized roller shutter stops running, and the current position of the lifting curtain (200) is set as the upper limit, then the motorized roller shutter drives the lifting curtain (200) to descend to the lower limit point, at which the lifting curtain (200) abuts against the ground to cause the overall weight of the motorized roller shutter to decrease beyond the normal fluctuation range relative to the standard weight, the motorized roller shutter stops running, and the current position of the lifting curtain (200) is set as the lower limit.

7. The motorized roller shade start-stop method of claim 1 or 6, wherein: The motorized roller shutter records the distance between the upper limit and the lower limit as a travel range, in the next limit calibration process, the upper limit of the motorized roller shutter is recalibrated, and the lower limit of the motorized roller shutter is determined according to the recalibrated upper limit and the travel range.

8. The motorized roller shade start-stop method of claim 1, wherein: The motorized roller shutter is remotely controlled by a control panel and / or a remote controller.

9. Motorized roller shade, characterized in that The motorized roller shutter start-stop method according to any one of claims 1-8 is applied.

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