A position tracking error and response measurement device

Abstract

A position tracking error and response measuring device belongs to the technical field of position measurement. It is characterized by comprising a bracket (2), an encoder (15) is installed on the upper part of the bracket (2), a power device for driving the encoder intermediate shaft (16) to rotate is installed on the lower part of the bracket (2), and a position signal detection device is provided between the lower part of the encoder (15) and the power device, and the signal detection device includes a fixed end installed on the bracket (2), and a rotating end is sleeved on the lower part of the encoder (15) through a rotating connection device. The present invention installs the encoder on the bracket, installs the power device for driving the encoder intermediate shaft to rotate on the lower part of the bracket, and provides a position signal detection device between the lower part of the encoder and the power device. The signal detection device detects the position change between the lower part of the encoder and the power device, and conveniently detects the position error of the measured encoder. The detection method is simple, the detection result is accurate and reliable, and the cost is low.

Description

Technical Field

[0001] The invention discloses a position tracking error and response measuring device, belonging to the technical field of position measurement. Background Art

[0002] As a position detection device, the position error of the encoder is an important technical performance indicator of the encoder. However, there is no device for detecting the encoder position error on the market. If the encoder position error is not detected, the consistency of the encoder cannot be guaranteed, resulting in large differences in the performance of the encoder. If such an encoder is installed on a servo motor, it will inevitably lead to unstable servo motor speed, affecting product performance. The encoder rotational resistance is an important factor affecting the encoder position accuracy. The encoder position error can also be indirectly determined by measuring the encoder rotational resistance. However, due to the small encoder rotational resistance, it is difficult to find a sensor on the market that can directly measure the encoder rotational resistance. If a custom torque sensor is made, the price is relatively expensive. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an encoder tester that is convenient to detect, accurate in detection and low in cost.

[0004] The technical solution adopted by the present invention to solve its technical problems is: the position tracking error and response measuring device is characterized in that it includes a bracket, an encoder is installed on the upper part of the bracket, a power device for driving the encoder intermediate shaft to rotate is installed on the lower part of the bracket, and a position signal detection device is provided between the lower part of the encoder and the power device. The signal detection device includes a fixed end installed on the bracket, and a rotating end is sleeved on the lower part of the encoder through a rotating connecting device.

[0005] The present invention fixes the encoder on a bracket, installs a power device driving the encoder intermediate shaft to rotate at the lower part of the bracket, and provides a position signal detection device between the lower part of the encoder and the power device. The signal detection device detects the deformation of the connection part between the lower part of the encoder and the power device, and the position detection of the encoder, so as to conveniently detect the change of the torque of the encoder being tested. The detection method is simple, the detection result is accurate and reliable, and the cost is low.

[0006] A positioning device is provided between the encoder and the bracket.

[0007] The positioning device includes a spring pressure plate and an encoder fixing plate. The encoder fixing plate is horizontally arranged, and one end of the encoder fixing plate is fixed to the connecting bracket, and the other end is pressed on the top of the encoder. The lower part of the encoder is installed on the upper part of the encoder fixing plate through a cylindrical pin, and the middle axis of the encoder passes downward through the encoder fixing plate and is sleeved on the rotating connecting device.

[0008] The rotating connection device includes a rotating shaft, a bearing and a coupling. The upper end of the rotating shaft is sleeved on the outer side of the lower part of the encoder intermediate shaft. The outer side of the upper end of the rotating shaft and the positioning device bracket are provided with bearings and O-rings. The lower end of the rotating shaft is connected to the power device through a coupling.

[0009] The coupling is a wire coupling.

[0010] The position signal detection device comprises an optical encoding disk and an optical encoding reader, the fixed end is the optical encoding reader, and the rotating end is the optical encoding disk.

[0011] The power device comprises a motor, a motor fixing plate and a shaft sleeve. One side of the motor is connected to the bracket through the motor fixing plate. The shaft sleeve is mounted on the motor output shaft and is connected to the lower part of the rotating connection device through the shaft sleeve.

[0012] The support is a vertical stand, and a base plate is arranged at the bottom of the support.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention fixes the encoder on a bracket, installs a power device driving the encoder intermediate shaft to rotate at the lower part of the bracket, and provides a position signal detection device between the lower part of the encoder and the power device. The signal detection device detects the deformation of the connection part between the lower part of the encoder and the power device, and the position detection of the encoder, so as to conveniently detect the change of the torque of the encoder being tested. The detection method is simple, the detection result is accurate and reliable, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main view of the encoder tester.

[0016] Figure 2 Schematic diagram of the side view of the encoder tester.

[0017] Figure 3 Schematic diagram of the top view of the encoder tester.

[0018] Among them, 1, base plate 2, bracket 3, servo motor 4, motor fixing plate 5, encoder fixing plate 6, bushing 7, wire coupling 8, optical encoder disk 9, rotating shaft 10, bearing 11, O-ring 12, cylindrical pin 13, optical encoder reader 14, spring pressure piece 15, encoder 16, encoder intermediate shaft. DETAILED DESCRIPTION

[0019] Figures 1 to 3 The best embodiment of the present invention is shown below in conjunction with the attached Figures 1 to 3 The present invention is further described.

[0020] See attached Figures 1 to 3: An encoder tester includes a bracket 2, an encoder 15 is installed on the upper part of the bracket 2, a power device for driving the encoder intermediate shaft 16 to rotate is installed on the lower part of the bracket 2, and a position signal detection device is provided between the lower part of the encoder 15 and the power device. The signal detection device includes a fixed end installed on the bracket 2, and a rotating end is sleeved on the lower part of the encoder 15 through a rotating connecting device.

[0021] A positioning device is provided between the encoder 15 and the bracket 2. The positioning device includes a spring pressing piece 14 and an encoder fixing plate 5. The encoder fixing plate 5 is arranged horizontally, and one horizontal end of the encoder fixing plate 5 is fixedly connected to the bracket 2, and the other end is pressed on the top of the encoder 15. The lower part of the encoder 15 is installed on the upper part of the encoder fixing plate 5 through a cylindrical pin 12, and the encoder intermediate shaft 16 passes downward through the encoder fixing plate 5 and then sleeves the rotating connection device.

[0022] The rotating connection device includes a rotating shaft 9, a bearing 10 and a coupling. The upper end of the rotating shaft 9 is sleeved on the outer side of the lower part of the encoder intermediate shaft 16. The outer side of the upper end of the rotating shaft 9 and the positioning device bracket are provided with a bearing 10 and an O-ring 11. The lower end of the rotating shaft 9 is connected to the power device through a coupling. The coupling is a wire coupling 7.

[0023] The position signal detection device includes an optical encoder disk 8 and an optical encoder reader 13, wherein the fixed end is the optical encoder reader 13, and the rotating end is the optical encoder disk 8. The power device includes a motor, a motor fixing plate 4, and a shaft sleeve 6. One side of the motor is connected to the bracket 2 through the motor fixing plate 4. The shaft sleeve 6 is mounted on the motor output shaft and connected to the lower part of the rotating connection device through the shaft sleeve 6. The bracket 2 is a vertical vertical plate, and a bottom plate 1 is provided at the bottom of the bracket 2.

[0024] Working process and working principle: The servo motor 3 rotates, driving the rotating shaft 9 to rotate through the wire coupling 7, and the rotating shaft 9 drives the encoder intermediate shaft 16 to rotate through the O-ring 11. When the rotation resistance of the encoder 15 remains unchanged, the position signal detected by the optical encoder reader 13 is consistent with the position signal detected by the encoder of the servo motor 3; when the rotation resistance of the encoder 15 increases or decreases, the deformation of the wire coupling 7 changes, and the position signal detected by the optical encoder reader and the position signal detected by the encoder of the servo motor 3 change. The motion control card receives the position signals detected by the optical encoder reader 13 and the servo motor 3 respectively, and then performs differential operation and outputs the result to the virtual oscilloscope. The virtual oscilloscope displays the waveform on the host computer and records the peak and trough values ​​at the same time, so that the changes in the encoder torque can be easily observed and recorded.

[0025] By installing the encoder 15 on the bracket 2, installing a power device that drives the encoder intermediate shaft 16 to rotate at the lower part of the bracket 2, and providing a position signal detection device between the lower part of the encoder 15 and the power device, the position change between the lower part of the encoder 15 and the power device is detected by the signal detection device, and the position error of the encoder 15 under test is conveniently detected. The detection method is simple, the detection result is accurate and reliable, and the cost is low.

[0026] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A position tracking error and response measuring device for measuring torque, characterized in that: The invention comprises a bracket (2), an encoder (15) is mounted on the upper part of the bracket (2), a power device for driving the encoder intermediate shaft (16) to rotate is mounted on the lower part of the bracket (2), a position signal detection device is provided between the lower part of the encoder (15) and the power device, the position signal detection device comprises a fixed end and a rotating end, the fixed end is mounted on the bracket (2), and the rotating end is sleeved on the lower part of the encoder (15) via a rotating connection device; A positioning device is provided between the encoder (15) and the bracket (2); The rotating connection device comprises a rotating shaft (9), a bearing (10) and a coupling, the upper end of the rotating shaft (9) is sleeved on the outer side of the lower part of the encoder intermediate shaft (16), a bearing (10) and an O-ring (11) are provided between the outer side of the upper end of the rotating shaft (9) and the positioning device, and the lower end of the rotating shaft (9) is connected to the power device via the coupling; The coupling is a wire coupling (7); The position signal detection device comprises an optical encoding disk (8) and an optical encoding reader (13), the fixed end being the optical encoding reader (13) and the rotating end being the optical encoding disk (8); The wire coupling (7) is capable of deformation.

2. A position tracking error and response measurement device according to claim 1, characterized in that: The positioning device comprises a spring pressing piece (14) and an encoder fixing plate (5), the encoder fixing plate (5) is arranged horizontally, and one horizontal end of the encoder fixing plate (5) is fixedly connected to the bracket (2), the other end of the spring pressing piece (14) is pressed on the top of the encoder (15), the lower part of the encoder (15) is installed on the upper part of the encoder fixing plate (5) through a cylindrical pin (12), and the encoder intermediate shaft (16) passes downward through the encoder fixing plate (5) and is sleeved on the rotating connection device.

3. A position tracking error and response measurement device according to claim 1, characterized in that: The power device comprises a motor, a motor fixing plate (4) and a shaft sleeve (6); one side of the motor is connected to the bracket (2) via the motor fixing plate (4); the shaft sleeve (6) is sleeved on the motor output shaft and connected to the lower part of the rotating connection device via the shaft sleeve (6).

4. A position tracking error and response measurement device according to claim 1, characterized in that: The support (2) is a vertical stand, and a bottom plate (1) is provided at the bottom of the support (2).

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