A test fixture for an automotive angle sensor

Abstract

The present invention discloses a test fixture for an automotive angle sensor, which relates to the technical field of test fixtures and includes a detection shaft. On the detection shaft, there are a first fastening member and a second fastening member for respectively limiting a first signal input rotor and a second signal input rotor of the angle sensor. The first fastening member and the second fastening member are sleeved on the detection shaft and are slidably connected to the detection shaft. The first fastening member is a split member composed of at least two parts, and the second fastening member is a split member composed of at least two parts. By sliding the first fastening member and the second fastening member on the detection shaft, the outer envelope circle diameter of the first fastening member and the second fastening member is changed, so as to fix the first signal input rotor and the second signal input rotor. Furthermore, the fixing, disassembly and relative angle adjustment of the first signal input rotor and the second signal input rotor can be quickly realized, which can greatly improve the detection efficiency and detection accuracy of the angle sensor.

Description

Technical Field

[0001] The present invention relates to the technical field of test fixtures, and specifically to a test fixture for an automotive angle sensor. Background Art

[0002] An automotive angle sensor is installed inside a steering column under an automotive steering wheel, and is used to detect and calculate the absolute angle of the steering wheel rotation, and further provide the necessary steering wheel rotation angle signal for the active safety system of the vehicle;

[0003] The detection of the automotive angle sensor is mainly because the angular difference between the second signal input rotor and the first signal input rotor on the automotive angle sensor during installation will affect the measurement value of the receiving system, thereby reducing the accuracy of the angle sensor and affecting the safe driving of the vehicle;

[0004] When the existing technology is used to detect the automotive angle sensor, the detection efficiency is low. It is impossible to quickly lock the second signal input rotor and the first signal input rotor, quickly adjust the relative angle between the second signal input rotor and the first signal input rotor, and quickly adjust the gap between the second signal input rotor and the receiving system, resulting in a reduction in the detection efficiency of the automotive angle sensor;

[0005] Therefore, there is an urgent need for a test fixture for an automotive angle sensor to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a test fixture for an automotive angle sensor to solve the problems raised in the existing technology.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A test fixture for an automotive angle sensor, including a detection shaft, and a first fastening member and a second fastening member for respectively limiting the first signal input rotor and the second signal input rotor of the angle sensor are arranged on the detection shaft.

[0008] The first fastening member and the second fastening member are sleeved on the detection shaft and are slidably connected to the detection shaft. The first fastening member is a split member composed of at least two parts, and the second fastening member is a split member composed of at least two parts. By sliding the first fastening member and the second fastening member on the detection shaft, the outer envelope circle diameter of the first fastening member and the second fastening member is changed to fix the first signal input rotor and the second signal input rotor.

[0009] Through the first fastening member and the second fastening member, rapid fastening and relaxation of the first signal input rotor and the second signal input rotor can be achieved, ensuring the detection efficiency of the angle sensor.

[0010] The sliding surface of the detection shaft with the first fastening member and the second fastening member is a conical surface, and the contact surfaces of the first fastening member and the second fastening member with the detection shaft are inclined surfaces. When the first fastening member and the second fastening member fasten the first signal input rotor and the second signal input rotor respectively, they move towards each other.

[0011] When the first signal input rotor and the second signal input rotor are fastened and fixed by the first fastening member and the second fastening member, it is a stepless and slow fastening, avoiding damage to the first signal input rotor and the second signal input rotor.

[0012] A driving member for moving and positioning the first fastening member and the second fastening member is provided on the detection shaft.

[0013] The driving member is a nut, and the nut is threadedly connected to the detection shaft. The driving movement of the first fastening member and the second fastening member is realized by the movement generated by rotating the nut.

[0014] One end of the detection shaft is detachably connected to a driving shaft, the driving shaft is driven to rotate by a power component, and an encoder is connected to the other end of the detection shaft.

[0015] The encoder transmits the detection signal to the calculation terminal.

[0016] Both ends of the detection shaft are connected to the fixed seat through bearings, and a fastening seat for positioning the angle sensor is provided on the detection shaft.

[0017] The fastening seat includes a limit seat and a fastening plate, and the clamping of the limit seat and the fastening plate realizes the positioning of the angle sensor.

[0018] An angle gauge is provided on the detection shaft for controlling the adjusted angle value when adjusting the relative angle of the first signal input rotor and the second signal input rotor.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] By providing the first fastening member and the second fastening member and adopting a split design, which cooperates with the conical surface on the detection shaft, under the action of the nut, the first signal input rotor and the second signal input rotor can be quickly fixed. At the same time, during the detection process, in cooperation with the angle gauge, the relative angle of the first signal input rotor and the second signal input rotor can also be quickly adjusted;

[0021] At the same time, according to the reception and analysis of the signals generated by the first signal input rotor and the second signal input rotor by the receiving system, and comparing and analyzing with the detection data of the encoder, the accuracy of the angle sensor can be detected;

[0022] Make the whole detection process more efficient and accurate. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the installation position of the angle sensor in a test fixture for an automotive angle sensor according to the present invention;

[0024] Figure 2 It is a schematic structural diagram of the fixation of the angle sensor by the first fastening member and the second fastening member in a test fixture for an automotive angle sensor according to the present invention;

[0025] Figure 3 It is a schematic structural diagram of a test fixture for an automotive angle sensor according to the present invention;

[0026] Figure 4 It is a schematic structural diagram of the first fastening member and the second fastening member in a test fixture for an automotive angle sensor according to the present invention;

[0027] Figure 5 It is a schematic structural diagram of the conical surface in a test fixture for an automotive angle sensor according to the present invention;

[0028] Reference numerals in the drawings: 1, detection shaft; 2, angle sensor; 3, nut; 4, first fastening member; 5, second fastening member; 6, first signal input rotor; 7, second signal input rotor; 8, angle gauge; 9, drive shaft; 10, encoder; 11, bearing; 12, fixed seat; 13, limit seat; 14, fastening plate; 15, conical surface. Detailed Embodiment

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment: This embodiment provides an optimal implementation scheme of a test fixture for an automotive angle sensor. As Figure 1 - Figure 2 shown, it includes a detection shaft 1, and on the detection shaft 1, there are a first fastening member 4 and a second fastening member 5 for respectively limiting the first signal input rotor 6 and the second signal input rotor 7 of the angle sensor 2.

[0031] Specifically, as Figure 4 shown, the first fastening member 4 and the second fastening member 5 are sleeved on the detection shaft 1 and are slidably connected to the detection shaft 1. The first fastening member 4 is a split member composed of at least two parts, and the second fastening member 5 is a split member composed of at least two parts;

[0032] For example, the first fastening member 4 and the second fastening member 5 are composed of three parts. When the three parts are in a combined state without fastening the first signal input rotor 6 and the second signal input rotor 7, and when the first fastening member 4 and the second fastening member 5 fix the first signal input rotor 6 and the second signal input rotor 7, the formed circumscribed circle will increase, realizing the fixation of the first signal input rotor 6 and the second signal input rotor 7 from the inside.

[0033] By sliding the first fastening member 4 and the second fastening member 5 on the detection shaft 1, the diameter of the circumscribed circle of the first fastening member 4 and the second fastening member 5 is changed, realizing the fixation of the first signal input rotor 6 and the second signal input rotor 7.

[0034] The design that the first fastening member 4 and the second fastening member 5 are in parts enables the first fastening member 4 and the second fastening member 5 to change the diameter of their circumscribed circle, thereby facilitating the quick fixation of the first signal input rotor 6 and the second signal input rotor 7 and improving the detection efficiency of the vehicle angle sensor 2.

[0035] Further, the sliding surfaces of the detection shaft 1 and the first fastening member 4 and the second fastening member 5 are conical surfaces 15. As Figure 5 shown, the contact surfaces of the first fastening member 4 and the second fastening member 5 and the detection shaft 1 are inclined surfaces, realizing the mutual sliding between the conical surface 15 and the inclined surfaces. When the first fastening member 4 and the second fastening member 5 respectively fasten the first signal input rotor 6 and the second signal input rotor 7, they move towards each other, so that the diameter of the circumscribed circle of the first fastening member 4 and the second fastening member 5 can be changed, thereby realizing the quick fastening of the second signal input rotor 6 and the first signal input rotor 7.

[0036] When it is necessary to adjust the relative angle between the second signal input rotor 6 and the first signal input rotor 7, the fixation of the second fastening member 5 on the second signal input rotor 7 is cancelled, and the detection shaft 1 is rotated. Since the fixation of the first fastening member 4 on the first signal input rotor 6 is not cancelled at this time, the first signal input rotor 6 will rotate with the rotation of the detection shaft 1. At this time, the relative angle between the first signal input rotor 6 and the second signal input rotor 7 will change.

[0037] Specifically, as Figure 3 shown, through the angle gauge 8 fixedly arranged on the detection shaft 1, the relative angle value adjusted by the first signal input rotor 6 and the second signal input rotor 7 is judged, avoiding that the adjusted relative angle has no reference value and affecting the detection efficiency of the angle sensor 2.

[0038] In order to realize the movement of the first fastening member 4 and the second fastening member 5.

[0039] A drive component for moving and fixing the positions of the first fastening component 4 and the second fastening component 5 is provided on the detection shaft 1.

[0040] Specifically, the drive component is a nut 3. The nut 3 is threadedly connected to the detection shaft 1, and the driving movement of the first fastening component 4 and the second fastening component 5 is realized by the movement generated by rotating the nut 3.

[0041] In order to realize the rotation of the entire detection jig and the detection of the angle sensor 2.

[0042] One end of the detection shaft 1 is detachably connected to a drive shaft 9;

[0043] When the angle sensor 2 needs to be installed and detected, the drive shaft 9 on the detection shaft 1 is disassembled. After disassembly, the angle sensor 2 is installed on the detection shaft 1 from the disassembly part of the detection shaft 1 and the drive shaft 9;

[0044] The drive shaft 9 is driven to rotate by a power component. Specifically, the power component can be a stepper motor. In order to realize the analysis and comparison of the detection results, an encoder 10 is connected to the other end of the detection shaft 1. The encoder 10 transmits the detection signal to the calculation terminal, and the calculation terminal analyzes and judges the actual accuracy of the angle sensor 2 according to the detection data of the encoder 10.

[0045] Specifically, when the first signal input rotor 4 and the second signal input rotor 5 rotate, the receiving system senses the angular signals of the first signal input rotor 4 and the second signal input rotor 5 by means of electromagnetic induction;

[0046] Further, the receiving system is a PCB board. An exciting coil, a receiving coil and a chip (the exciting coil, the receiving coil and the chip are not shown in the figure) are provided on the PCB board. The signal of the exciting coil is inductively input into the receiving coil. When the first signal input rotor 4 and the second signal input rotor 5 rotate relative to the PCB board, the alternating change of the gap between the teeth causes the change of the magnetic flux (the specific teeth are shown in the figure but not marked), so that the receiving coil senses the signal change, the coupling strength between the exciting coil and the receiving coil changes, the receiving coil senses the change of the voltage signal, and two angular signals are obtained by using two chips to process the voltage signal respectively.

[0047] Further, the two angular signals are respectively calculated by two chips: the angle is multiplied by the torsion bar coefficient of the torsion bar, so that the torque signal can also be obtained.

[0048] The angular accuracy is compared, and the torque is calculated and analyzed according to the angular accuracy.

[0049] Both ends of the detection shaft 1 are connected to the fixed seat 12 through bearings 11, and a fastening seat for fixing the position of the angle sensor 2 is provided on the detection shaft 1.

[0050] The fastening seat includes a limit seat 13 and a fastening plate 14. When the angle sensor 2 is installed at the specified position on the limit seat 13, the limit seat 13 and the fastening plate 14 are fixedly connected by bolts to fix the installation position of the angle sensor 2. After the angle sensor 2 completes the detection, the angle sensor 2 can be removed by disassembling the fastening plate 14.

[0051] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A test fixture for an automobile angle sensor, comprising a detection axis, characterized in that: The detection shaft is provided with a first fastening component and a second fastening component for limiting the first signal input rotor and the second signal input rotor of the angle sensor respectively; The first fastening component and the second fastening component are sleeved on the detection shaft and slidably connected with the detection shaft. The first fastening component is a split component composed of at least two parts, and the second fastening component is a split component composed of at least two parts. By sliding the first fastening component and the second fastening component on the detection shaft, the outer envelope circle diameters of the first fastening component and the second fastening component are changed to achieve the fixation of the first signal input rotor and the second signal input rotor; The sliding surfaces between the detection shaft and the first fastening component and the second fastening component are conical surfaces, the contact surfaces between the first fastening component and the second fastening component and the detection shaft are inclined surfaces, and the first fastening component and the second fastening component move toward each other when fastening the first signal input rotor and the second signal input rotor respectively.

2. The test fixture for an automobile angle sensor according to claim 1, characterized in that: The detection shaft is provided with a driving component for moving and fixing the positions of the first fastening component and the second fastening component.

3. The test fixture for an automobile angle sensor according to claim 2, characterized in that: The driving component is a nut, and the nut is threadedly connected to the detection shaft. The movement generated by rotating the nut is used to drive the first fastening component and the second fastening component to move.

4. The test fixture for an automobile angle sensor according to claim 1, characterized in that: One end of the detection shaft is detachably connected to a driving shaft, and the driving shaft is driven to rotate by a power component. The other end of the detection shaft is connected to an encoder.

5. The test fixture for an automobile angle sensor according to claim 4, characterized in that: The encoder transmits the detection signal to the computing terminal.

6. The test fixture for an automobile angle sensor according to claim 4, characterized in that: The two ends of the detection shaft are connected to the fixing seat through bearings, and the detection shaft is provided with a fastening seat for fixing the position of the angle sensor.

7. The test fixture for an automobile angle sensor according to claim 6, characterized in that: The fastening seat comprises a limiting seat and a fastening plate, and the limiting seat and the fastening plate are clamped to fix the position of the angle sensor.

8. The test fixture for an automobile angle sensor according to claim 1, characterized in that: The detection shaft is provided with an inclinometer for controlling the adjusted angle value when the relative angle between the first signal input rotor and the second signal input rotor is adjusted.

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