Power-off position memory device
By using angle detectors and position detectors in the power-off position memory device and combining processor calculations, the problem that the prior art cannot accurately restore the push rod position is solved, and the effect of accurately restoring the push rod position after power-off is achieved.
Patent Information
- Application Number
- CN202421562297.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-03
AI Technical Summary
The existing power-off position memory device cannot accurately restore the push rod position, especially after the push rod position changes due to external forces or mechanical failures.
A power-off position memory device is designed to detect the angle of the motor shaft and the position detector to detect the position of the push rod through the angle detection part, and the accurate position information of the push rod is obtained by using the processor.
It realizes accurate recovery of the push rod position after power outage, improving user experience and convenience of the equipment.
Smart Images
Figure CN222837526U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of equipment displacement driving, in particular to a power-off position memory device. Background Art
[0002] With the continuous development of automotive electronic technology, the electric adjustment function of devices such as car displays, windows and car seats has become an important part of modern cars. The displacement of these devices usually relies on electric actuators, which control the rotation of the motor to drive the movement of the actuator, thereby adjusting the position of the device.
[0003] In practical applications, in order to ensure the comfort and convenience of users, many vehicles are equipped with a memory function that can remember the position of the push rod before power failure and restore it to the previous position after power is restored. This function is achieved through a built-in memory chip or control system, which stores the position information of the push rod in the memory device so that it can be quickly restored when needed.
[0004] However, although the existing technology can memorize the push rod position before power failure, if the push rod position changes due to some reason (such as external force, mechanical failure, etc.) after power failure, it cannot be accurately restored to the state before power failure. This brings inconvenience to users and affects the vehicle experience. In order to solve this problem, it is necessary to develop a technology that can obtain the precise position of the push rod movement so that the push rod can be restored to the correct position. Utility Model Content
[0005] In order to solve the above problems, the purpose of the utility model is to provide a power-off position memory device, which detects the angle of the motor shaft through the angle detection part and the position of the push rod through the position detection part every time the power is turned on, and the data obtained from both are calculated by the processor to obtain the accurate position information of the push rod.
[0006] The utility model is realized by the following technical solutions:
[0007] A power-off position memory device comprises: a power member, the power member comprises a rotating shaft; an angle detection member, the angle detection member is arranged on the power member and is used to detect the angle signal of the rotating shaft; a transmission component, the transmission component has a push rod, the transmission component is connected to the power member, and the power member drives the push rod to move; a position detection member, the position detection member is used to detect the displacement signal of the push rod in its extension and retraction direction; a controller, the angle detection member and the position detection member are both electrically connected to the controller, and are used to receive the angle signal and the displacement signal to obtain the position signal of the push rod.
[0008] Furthermore, the push rod outer cover is provided with a shell, and a plurality of magnetic layers are continuously and equidistantly coated on the inner wall of the shell along the axial direction of the push rod; the magnetic field strengths of any two magnetic layers are different; and the position detection component is arranged on the side wall of the push rod.
[0009] Furthermore, the push rod is coated with a plurality of magnetic layers continuously and equidistantly along its axial direction; the magnetic field strengths of any two magnetic layers are different; and the position detection component is located at the starting end or the end end of the push rod stroke.
[0010] Furthermore, the length of the magnetic layer in the axial direction of the push rod is equal to the displacement of the push rod driven by one rotation of the rotating shaft.
[0011] Furthermore, the position of the push rod = S*(N-1)+S*α / 360; wherein S is the displacement of the push rod driven by one rotation of the shaft, α is the angle of the shaft, and the serial numbers of the magnetic layers from the direction close to the position detection component to the direction away from the position detection component in the initial position are marked as 1, 2, 3...N in sequence.
[0012] Furthermore, the angle detection component includes an angle Hall sensor.
[0013] Furthermore, the position detection component includes a position Hall sensor.
[0014] Furthermore, the transmission assembly also includes a lead screw connected to the power member, the push rod is connected to a lead screw nut of the lead screw, and the lead screw converts the rotational motion of the power member into a linear motion of the lead screw nut.
[0015] Compared with the prior art, the technical solution of the utility model and its beneficial effects are as follows:
[0016] (1) In the present invention, the position detection element is used to detect the displacement signal of the push rod in its extension and retraction direction, and the angle detection element is used to receive the angle signal and the displacement signal. The controller obtains the precise position of the push rod based on the angle signal and the displacement signal.
[0017] (2) The push rod of the utility model is continuously and equidistantly coated with a plurality of magnetic layers along its axial direction; the magnetic field strengths of any two magnetic layers are different, so that it is easy to detect the magnetic field strengths in different intervals according to the position Hall sensor installed on the side of the push rod, obtain different electrical signals, and thus identify which interval the push rod falls in, and then know the approximate displacement signal of the push rod.
[0018] (3) The utility model divides the push rod stroke into N intervals, and the length of each interval is equal to the displacement generated by one rotation of the shaft. Therefore, the position detection component determines which interval the push rod falls into based on the different electrical signals obtained by the detection of the magnetic field strength, thereby confirming how many complete circles the shaft has rotated. Combined with the displacement generated by the angle value detected by the angle detection component, the precise position of the push rod can be known. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a flowchart of a power-off position memory device provided by an embodiment of the utility model;
[0020] Figure 2 It is a cross-sectional view of a power-off position memory device provided by an embodiment of the utility model.
[0021] Illustration Description:
[0022] Angle detection component-10; position detection component-20; reduction motor-30; rotating shaft-31; coupling-40; screw rod-50; screw rod nut-60; push rod-70. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0024] See also Figure 1 A power-off position memory device includes a power member, an angle detection member, a transmission assembly, and a controller. The power member includes a rotating shaft. The angle detection member is arranged on the power member and is used to detect the angle signal of the rotating shaft. The transmission assembly has a push rod. The transmission assembly is connected to the power member. The power member drives the push rod to move. The position detection member is used to detect the displacement signal of the push rod in its extension direction. The angle detection member and the position detection member are both electrically connected to the controller. The controller is used to receive the angle signal and the displacement signal to obtain the precise position of the push rod. The power-off position memory device of the utility model can realize that no matter how the displacement of the push rod changes before power-on, the angle detection member and the position detection member collect data to the processor after power-on, and the accurate position information of the push rod can be obtained.
[0025] In one embodiment, the push rod outer cover is provided with a shell, and a plurality of magnetic layers are continuously and equidistantly coated on the inner wall of the shell along the axial direction of the push rod; the magnetic field strengths of any two magnetic layers are different, that is, the displacement stroke of the push rod is divided into a plurality of intervals by the magnetic layers. Therefore, it is convenient to detect the magnetic field strengths in different intervals according to the position Hall sensor installed on the side wall of the push rod, obtain different electrical signals, and send them to the main controller to identify which interval the push rod falls on, and then know the approximate displacement signal of the push rod.
[0026] In another embodiment, the push rod is coated with a plurality of magnetic layers in a continuous and equidistant manner along its axial direction; the magnetic field strengths of any two magnetic layers are different; the position detection member is located at the starting end or the end end of the push rod stroke. The displacement of the push rod is determined according to the different magnetic field strengths detected by the detection member.
[0027] For the convenience of calculation, in this embodiment, the axial length of the magnetic layer in the push rod is equal to the displacement of the push rod driven by one rotation of the shaft, that is, the push rod stroke is divided into N intervals, and each interval is equidistant, and the displacement generated by one rotation of the shaft (360°) is exactly one interval length S. The position detection member is located at the starting end or the end of the push rod stroke, so that the push rod can be judged in which interval by different electrical signals obtained according to the detection of the magnetic field strength.
[0028] For the convenience of description, the direction from the initial position close to the position detection component to the direction away from the position detection component is marked as the first interval, the second interval, the third interval...the Nth interval and so on.
[0029] For example, when the position detection component detects that the push rod moves to the second interval, it can be known that the shaft has rotated a full circle, but the second circle has not been completed, so the push rod displacement caused by a full circle is S; the main controller then reads the shaft angle α detected by the angle Hall sensor, then the displacement of the push rod in the second interval is S*α / 360, and the precise position of the push rod is S+S*α / 360.
[0030] participate Figure 2In this embodiment, the angle detection member 10 is an angle Hall sensor, and the position detection member 20 is a position Hall sensor. The power member is a reduction motor 30, and the reduction motor 30 has a rotating shaft 31. The transmission assembly also includes a lead screw 50 connected to the rotating shaft 31 through a coupling 40, and the push rod 70 is connected to the lead screw nut 60. The lead screw 50 converts the rotational motion of the power member into the linear motion of the lead screw nut 60, thereby indirectly driving the push rod 70 to perform linear motion. As is well known, the lead screw is a mechanical part that can convert rotational motion into linear motion, and is usually composed of a nut, a lead screw and a bearing, which will not be repeated here. The displacement range of the push rod is obtained by the position signal collected by the position Hall sensor, and the precise displacement of the push rod within the displacement range is obtained by the angle signal collected by the angle Hall sensor, thereby obtaining the precise position information of the push rod.
[0031] The above description shows and describes the preferred embodiments of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept of this article through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.
Claims
1. A power-off position memory device, characterized in that: include: A power member, wherein the power member comprises a rotating shaft; An angle detection member, which is disposed on the power member and is used to detect an angle signal of the rotating shaft; A transmission assembly, wherein the transmission assembly has a push rod, the transmission assembly is connected to the power member, and the power member drives the push rod to move; A position detection member, the position detection member is used to detect a displacement signal of the push rod in its extension direction; The controller, the angle detection element and the position detection element are both electrically connected to the controller, and are used to receive angle signals and displacement signals to obtain position signals of the push rod.
2. A power-off position memory device according to claim 1, characterized in that: The push rod outer cover is provided with a shell, and a plurality of magnetic layers are continuously and equidistantly coated on the inner wall of the shell along the axial direction of the push rod; the magnetic field strengths of any two magnetic layers are different; and the position detection component is arranged on the side wall of the push rod.
3. A power-off position memory device according to claim 1, characterized in that: The push rod is coated with a plurality of magnetic layers continuously and equidistantly along its axial direction; the magnetic field strengths of any two magnetic layers are different; and the position detection component is located at the starting end or the end end of the push rod stroke.
4. A power-off position memory device according to claim 2 or 3, characterized in that: The length of the magnetic layer in the axial direction of the push rod is equal to the displacement of the push rod driven by the rotating shaft rotating one circle.
5. A power-off position memory device according to claim 4, characterized in that: The position of the push rod = S*(N-1)+S*α / 360; wherein S is the displacement of the push rod driven by one rotation of the shaft, α is the angle of the shaft, and the serial numbers of the magnetic layers from the direction close to the position detection component to the direction away from the position detection component in the initial position are marked as 1, 2, 3...N in sequence.
6. A power-off position memory device according to claim 1, characterized in that: The angle detection component includes an angle Hall sensor.
7. A power-off position memory device according to claim 1, characterized in that: The position detection element includes a position Hall sensor.
8. The power-off position memory device according to claim 1, characterized in that: The transmission assembly also includes a lead screw connected to the power member, the push rod is connected to a lead screw nut of the lead screw, and the lead screw converts the rotational motion of the power member into a linear motion of the lead screw nut.