Motion state sensing device for rotation gear
A technology of motion state and rotating mechanism, which is applied in the direction of converting sensor output, devices using electric/magnetic methods, measuring devices, etc., which can solve the problems of reduced ratio of long and short sides, reduced resolution of rotational speed sensing, and complex structure.
Inactive Publication Date: 2007-07-25
NANCHANG ZHENGDAO TECH INDS
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But its disadvantage is that the length of the long hypotenuse of the triangular tooth shape (the asymmetry of the asymmetrical magnetic field) determines the reliability of the rotation direction sensing. When it is desired to obtain a highly reliable direction signal, the longer the long side, the longer the long side. But at the same time, the resolution of the speed sensor will be reduced. On the contrary, when it is desired to obtain a high-resolution speed signal, the ratio of the length of the long side to the short side will inevitably be reduced, which will reduce the reliability of the steering.
[0008] Based on the importance of transient response for vehicle direction recognition, in "A Motor Vehicle Transmission Control Method and Device" disclosed in German Patent PCT / EP2004 / 000782, in order to improve the transient response time of direction recognition, in addition to using two sensors In addition to S1 and S2 to identify the direction of the vehicle, a third sensor S3 is also used to obtain a higher frequency through a corresponding induction wheel corresponding to S3 that has been mechanically accelerated. In the same period of this higher frequency, S1 , S2 output phase difference for identification, although this relatively improves the transient response of direction identification, but its structure is more complicated
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[0035] As shown in Fig. 1, it is the basic structural principle of the motion state sensing device of the rotating mechanism of the present invention. In its structure, there is a rotating body that is supported in the supporting unit and can rotate with the rotating mechanism, such as a disc body or a cylinder, on which there is one or a plurality of them are arranged at equal intervals at the circumference of the same rotation track. The sensing source of the permanent magnet material (as shown in Figure 4); one or more sensor groups are arranged in the magnetic sensing action range adapted to the rotation track of the permanent magnet sensing source on the rotating body, and in the sensor group It includes at least two sensing units and corresponding peripheral components that are arranged in a spaced (especially equidistant) manner that is compatible with the permanent magnet sensing source, and at least two sensing units in the sensor group are respectively connected to A...
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The invention relates to a rotation gear motion state sensing device, in the structure of which rotary unit with permanent magnet sensing source is supported in a supporting unit, wherein,at least a sensing device corresponding to permanent magnet sensing source is located in magnetic sensing action range corresponding to rotating trace of permanent magnet sensing source, besides, the sensing device at least comprises two sensing units equipped in the mode of span.The two sensing units are separately connected to operating comparison circuits for judging chronogenesis change of sensing signal, which have positive / negative directional interpreting circuit for chronogenesis state of sensing signal changes and at least one of velocity composition circuits for differential process.
Description
technical field [0001] The present invention relates to a sensing device for detecting the motion state of a rotating mechanism, including its rotational speed, rotational direction, etc., and is particularly suitable, but not limited to, for detecting the speed and / or forward and backward direction of a motor vehicle. Sensing device for detecting state. Background technique [0002] For rotating mechanisms, such as the running state of speed / or direction in the running state of vehicles such as motor vehicles, as well as the running state of rotating speed and / or rotating direction of operating equipment in many industrial fields, etc., real-time detection is performed, and the The test results are often required and indispensable as the basis for other control operations. Taking the automatic variable speed motor vehicle as an example, in order to ensure the normal and safe driving process, it has special requirements for the speed and direction of the speed, which are ma...
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IPC IPC(8): G01D5/248G01P3/42G01P3/488
Inventor 袁跃强赵济威
Owner NANCHANG ZHENGDAO TECH INDS