Camshaft signal panel angle detection device based on Hall effect sensor
The camshaft signal disc angle detection device based on the Hall effect sensor solves the accuracy problem of camshaft signal disc detection in the prior art and realizes automatic and accurate angle and pattern detection.
Patent Information
- Application Number
- CN202423301546.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The existing camshaft signal disc detection method is difficult to accurately obtain the graphic contour and output angle value, and requires manual detection.
A detection device based on a Hall effect sensor is used. Through the precise positioning and adjustment of the Hall effect sensor and the camshaft signal disk, combined with the amplification circuit and signal processing circuit, automatic detection of the signal disk pattern and output angle is achieved.
It eliminates the need for manual inspection, has high accuracy, and can intuitively display signal disk graphics and output angle values.
Smart Images
Figure CN223389128U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of camshaft measurement, in particular to a camshaft signal disk angle detection device based on a Hall effect sensor. Background Art
[0002] The camshaft is a component in a piston engine that controls the opening and closing of the valves. The camshaft signal disc transmits signals to the engine control system via a camshaft position sensor. Therefore, ensuring the camshaft signal disc's pattern and output angle is extremely important during production. Existing testing methods involve placing the camshaft horizontally on a testing device and manually measuring the camshaft signal disc using a dial indicator to obtain the angle value. However, this method struggles to accurately capture the camshaft signal disc's pattern. Utility Model Content
[0003] In view of the defects of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a camshaft signal plate angle detection device based on a Hall effect sensor, which can obtain the camshaft signal plate and output angle values according to the Hall effect principle of the sensor.
[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a camshaft signal disk angle detection device based on a Hall effect sensor, comprising a Hall effect sensor, a base and an L-shaped mounting plate, wherein the Hall effect sensor is mounted on a first strip hole on a vertical surface of the mounting plate, so that the Hall effect sensor can be adjusted up and down to ensure that the probe of the Hall effect sensor is at the same height as the center of the signal disk; the mounting plate can be mounted on the base through a second strip hole so as to be adjusted forward and backward to ensure that the Hall effect sensor is 1.5 to 2.5 mm away from the signal disk of the camshaft.
[0005] Preferably, at least one mounting hole is provided on the top of the base, and the mounting plate is mounted on the base via a fixing nut.
[0006] Preferably, the second strip-shaped hole is provided on the mounting plate.
[0007] Preferably, an opening is provided at a position of the base relative to the Hall effect sensor, so as to leave space for the movement of the Hall effect sensor when the Hall effect sensor moves backward.
[0008] Preferably, the Hall effect sensor is 2 mm away from the signal plate of the camshaft.
[0009] Preferably, the camshaft is clamped by a left top and a right top, and is driven to rotate by a driving mechanism provided at one end thereof.
[0010] Preferably, the upper portion of the base is provided with mounting holes extending left and right for manually installing fixing nuts.
[0011] The beneficial effects of the utility model are as follows: by rotating the camshaft near the Hall effect sensor probe, the convex teeth on the signal disk periodically change the magnetic field strength of the Hall effect sensor, thereby obtaining the signal disk graph and outputting the angle value to complete the detection according to the Hall effect principle, without the need for manual detection, with high accuracy and the ability to intuitively display the signal disk graph. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural diagram of the utility model;
[0013] Figure 2 for Figure 1 Front view of
[0014] Figure 3 for Figure 2 AA cross-section of
[0015] Figure 4 is a structural diagram of the base;
[0016] Figure 5 It is a structural diagram of the mounting plate;
[0017] In the figure: 1-Camshaft, 1a-Signal plate, 2-Drive plate, 3-Front center, 4-Base, 5-Mounting plate, 6-Fixing nut. 7-Hall effect sensor, 8-Tail center. DETAILED DESCRIPTION
[0018] In order to better understand the improvements made by the present invention relative to the prior art, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0019] like Figure 1 Figure 1 shows a camshaft signal plate angle detection device based on a Hall effect sensor. The device primarily comprises a Hall effect sensor 7, a base 4, and an L-shaped mounting plate 5. The Hall effect sensor 7 is mounted on the base 4 via the mounting plate 5 and can be adjusted relative to the camshaft 1. The camshaft 1 is clamped by a left centering pin 3 and a right centering pin 8 and rotated by a drive mechanism located at one end.
[0020] The mounting plate 5 has a first slot 5a on its vertical surface and a second slot 5b on its horizontal surface. The mounting plate 5 can be adjusted forward and backward on the top of the base 4 through the second slot 5b. The base 4 also has at least one mounting hole on its top. The mounting plate 5 is attached to the base 4 via a retaining nut 6. Mounting holes extending left and right are also provided on the top of the base 4 for manual installation of the retaining nut 6. The position of the retaining nut 6 on the second slot 5b is adjusted forward and backward to ensure that the Hall effect sensor 7 is within 91.5 to 2.5 mm of the camshaft 1 signal disc. To ensure accurate detection, the Hall effect sensor 7 is preferably positioned 92 mm from the camshaft 1 signal disc. An opening is provided in the base 4 relative to the Hall effect sensor 7 to allow for movement when the mounting plate 5 moves the Hall effect sensor backward.
[0021] The Hall effect sensor 7 is mounted on the first strip hole 5a on the vertical surface of the mounting plate 5, so that the Hall effect sensor 7 can be adjusted up and down in its fixed position on the first strip hole 5a to ensure that the probe of the Hall effect sensor 7 is at the same height as the center of the signal disk 9 for accurate measurement. When the signal disk 1a rotates with the camshaft 1, the convex teeth on the signal disk 1a will periodically change the magnetic field strength of the Hall effect sensor 7.
[0022] Based on the Hall effect principle, when the measured magnetic field passes through a Hall element, an electric field is generated in the conductor, generating a Hall voltage. The magnitude and polarity of the Hall voltage vary depending on the strength and direction of the magnetic field. After being amplified by an amplifier circuit, the Hall voltage is sent to a signal processing circuit for processing, ultimately outputting information about the magnetic field strength, which reflects the position and speed of the signal disk 1a. Finally, a grating encoder extracts each waveform signal from the signal disk 1a as it rotates 360°. The angle relationship between each waveform signal and the reference production angle is calculated, generating a graphic representation of the signal disk 1a and outputting the angle value.
[0023] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A camshaft signal plate angle detection device based on a Hall effect sensor, characterized in that: The invention comprises a Hall effect sensor (7), a base (4) and an L-shaped mounting plate (5), wherein the Hall effect sensor (7) is mounted on a first strip hole (5a) on a vertical surface of the mounting plate (5), so that the Hall effect sensor (7) can be adjusted up and down to ensure that the probe of the Hall effect sensor (7) and the center of the signal disk (9) are at the same height; and the mounting plate (5) can be mounted on the base (4) through a second strip hole (5b) so as to be adjustable forward and backward to ensure that the Hall effect sensor (7) is 1.5 to 2.5 mm away from the signal disk (9) of the camshaft (1).
2. The camshaft signal plate angle detection device based on a Hall effect sensor according to claim 1, characterized in that: At least one mounting hole is provided on the top of the base (4), and the mounting plate (5) is mounted on the base (4) via a fixing nut (6).
3. The camshaft signal plate angle detection device based on a Hall effect sensor according to claim 2, characterized in that: The second strip-shaped hole (5b) is provided on the mounting plate (5).
4. The camshaft signal plate angle detection device based on a Hall effect sensor according to claim 1, characterized in that: The base (4) is provided with an opening at a position relative to the Hall effect sensor (7).
5. The camshaft signal plate angle detection device based on a Hall effect sensor according to claim 1, characterized in that: The Hall effect sensor (7) is 2 mm away from the signal disk (9) of the camshaft (1).
6. The camshaft signal plate angle detection device based on a Hall effect sensor according to claim 1, characterized in that: The camshaft (1) is clamped by a left top (3) and a right top (8), and is driven to rotate by a driving mechanism arranged at one end thereof.
7. The camshaft signal plate angle detection device based on a Hall effect sensor according to claim 2, characterized in that: The upper portion of the base (4) is provided with mounting holes extending left and right for manually mounting a fixing nut (6).