CN218097829U - A detection device for the division error of a photoelectric shaft-angle encoder - Google Patents

Abstract

The utility model belongs to the technical field of the instrument measurement, a detection device and method of photoelectricity shaft angle encoder graduation error are related to, the utility model discloses a parallel bracing mechanism and shaft coupling link together photoelectricity shaft angle encoder and numerical control servo angle device, and coaxial with the operation axis of photoelectricity shaft angle encoder and numerical control servo angle device through horizontal adjustment mechanism. The numerical control servo angle device is controlled to generate a standard angle position with random numbers, the photoelectric shaft angle encoder generates angle signals accordingly, the angle signals are output and displayed by a signal processing unit of the photoelectric shaft angle encoder, and the difference value of the standard angle position and the output angle value of the photoelectric shaft angle encoder is calculated and is the index error value of the current angle position. The utility model discloses an accurate measurement of photoelectricity shaft angle encoder graduation error improves the scientificity, the degree of accuracy and the efficiency that detect.

Description

A detection device for the division error of a photoelectric shaft-angle encoder

technical field

The utility model belongs to the technical field of instrument measurement, in particular to a detection device for the division error of a photoelectric shaft angle encoder.

Background technique

The photoelectric shaft encoder (hereinafter referred to as the encoder) mainly uses a grating disc or a code disc as a measuring element to measure the rotation angle. It can be used as an angle measuring instrument alone, or as a measuring part of a certain equipment or instrument.

At present, the method of detecting the indexing error of the encoder is according to the method introduced in the JJF1115-2004 "Encoder" National Metrology Calibration Specification, that is, using a turntable (indexing table, goniometer) or a polygonal prism and an autocollimator. detection. The main problems of this detection method and device are: 1. The installation and debugging of the turntable and the encoder are cumbersome and the workload is large; 2. Major misjudgments are prone to occur, because the traditional method generally uses integral divisions, so it cannot be found For the subdivision error of the encoder, there will be a phenomenon that the lower the resolution or accuracy of the tested encoder, the smaller the division error, which is obviously inconsistent with the facts; 3. The operation is complicated, the detection efficiency is low, and it is easy to make mistakes.

Utility model content

In view of the above technical problems, the utility model provides a detection device for the division error of the photoelectric shaft angle encoder which can realize the accurate measurement of the division error of the encoder and improve the scientificity, accuracy and efficiency of the detection. In order to solve the technical problems in the background technology, the technical scheme that the utility model takes is:

A detection device for the indexing error of a photoelectric shaft-angle encoder, comprising: a numerically controlled servo angle device, a photoelectric shaft-angle encoder; the numerically-controlled servo angle device is coaxially connected to the photoelectric shaft-angle encoder through a The signal processing unit on the display shows the rotation angle value generated by the photoelectric shaft encoder.

The detection device for the indexing error of the photoelectric shaft-angle encoder also includes a parallel support mechanism. The parallel support mechanism includes a vertical support mechanism and a horizontal adjustment mechanism. The running axis of the CNC servo angle device is coaxial with the two-dimensional slide rail, and the photoelectric shaft angle encoder is connected to the two-dimensional slide rail.

The utility model connects the photoelectric shaft angle encoder and the numerical control servo angle device through a parallel support mechanism and a shaft coupling, and through a horizontal adjustment mechanism, the operating axes of the photoelectric shaft angle encoder and the numerical control servo angle device are coaxial, installed and debugged Convenience. Control the numerical control servo angle device to generate the standard angle position with random numbers, and the photoelectric shaft angle encoder generates the angle signal, which is output and displayed by the signal processing unit of the photoelectric shaft angle encoder itself, and calculates the standard rotation angle position and the photoelectric shaft angle code The difference value of the output angle value of the controller, which is the scale error value of the current rotation angle position.

The beneficial effects of the utility model:

The utility model realizes the accurate measurement of the division error of the photoelectric shaft angle encoder, the detection device is simple and practical, and the operation is simple and convenient, and the scientificity, accuracy and efficiency of the detection are improved.

Description of drawings

In order to more clearly illustrate the specific implementation of the present utility model or the technical solution in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific implementation or the prior art. Obviously, the accompanying drawings in the following description are some specific implementations of the present utility model, and those skilled in the art can obtain other protections belonging to the present application according to these drawings without creative work. attached drawings within the range.

Fig. 1 is the structural representation of the detection device of photoelectric shaft angle encoder indexing error;

Among them, 1. Numerical control servo angle device, 2. Shaft coupling, 3. Photoelectric shaft angle encoder, 4. Parallel support mechanism, 5. Signal processing unit, 41. Vertical support mechanism, 42. Horizontal adjustment mechanism.

detailed description

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, not all of them.

A detection device for the indexing error of a photoelectric shaft-angle encoder, as shown in Figure 1, comprising: a numerically controlled servo angle device 1, a photoelectric shaft-angle encoder 3; The coupling 3 is coaxially connected, and the coupling 2 is fixed through the connecting flange; the signal processing unit 5 on the photoelectric shaft encoder 3 displays the rotation angle value generated by the photoelectric shaft encoder 3 .

The detection device of the photoelectric shaft angle encoder indexing error also includes a parallel support mechanism 4, and the parallel support mechanism 4 includes a vertical support mechanism 41 and a horizontal adjustment mechanism 42, and the vertical support mechanism 41 is fixedly connected with the horizontal adjustment mechanism 42 at right angles Integral, the horizontal adjustment mechanism 42 includes a two-dimensional slide rail used to adjust the coaxial operation axes of the photoelectric rotary encoder 3 and the numerically controlled servo angle device 1 , and the photoelectric rotary encoder 3 is connected to the two-dimensional slide rail.

The above-mentioned detection device realizes the steps of detecting the indexing error of the photoelectric shaft-angle encoder as follows:

Step 1. Connect the photoelectric shaft encoder 3 and the numerical control servo angle device 1 through the parallel support mechanism 4 and the shaft coupling 2, and make the photoelectric shaft encoder 3 and the numerical control servo angle device 1 through the horizontal adjustment mechanism 42 in the parallel support mechanism 4. The running axes of the CNC servo angle device 1 are coaxial; the specific method is as follows:

On the horizontal adjustment mechanism 42, a two-dimensional slide rail for adjusting the coaxial operation axis of the photoelectric shaft-angle encoder 3 and the numerically controlled servo angle device 1 is set. The photoelectric shaft-angle encoder 3 is connected to the two-dimensional slide rail, and by adjusting the two-dimensional The position of the slide rail makes the photoelectric shaft angle encoder 3 and the running axis of the numerical control servo angle device 1 coaxial;

Step 2, turn on the photoelectric shaft angle encoder 3 and the numerical control servo angle device 1;

Step 3, clearing the indication values of the photoelectric shaft angle encoder 3 and the numerically controlled servo angle device 1;

Step 4: Control the numerical control servo angle device 1 to generate the first standard rotation angle θ ₁ with random numbers, and the photoelectric shaft encoder 3 generates the first rotation angle value θ ₁ ′, and the photoelectric shaft encoder 3 generates the first rotation angle value θ 1 ' The signal processing unit 5 performs output and display, and calculates the difference between the first standard rotation angle θ ₁ and the first rotation angle θ ₁ ′, δ ₁ =θ ₁ ′-θ ₁ , and the difference is the division of the current rotation angle difference;

Step 5, repeat step 4, the CNC servo angle device sequentially generates the 2nd, 3rd, ...i...n standard rotation angle positions θ ₂ , θ ₃ , ... θ _i ... θ _n , and calculates Indexing error values corresponding to the rotation angle positions δ ₂ , δ ₃ , ... δ _i ... δ _n ; the above-mentioned 1st, 2, 3, ...i...n standard rotation angle positions θ ₁ , θ ₂ , θ ₃ , ... θ _i ... θ _n are collectively referred to as the standard rotation angle θ, and its size is expressed by formula (1):

θ=T+r (1)

In the formula:

T - the integral part of the standard corner position;

r——The non-integer division part of the standard rotation position, which is a random number in the range of (0~T).

The numerical control servo angle device and shaft coupling involved in the embodiment of the utility model are all prior art, and the utility model can be realized by adopting products commonly used in the market, and will not be described in detail here. In the embodiments of the present utility model, those components and their connections that are not described in detail are all prior art or conventional technical means.

Finally, it should be noted that the above examples are only specific implementations of the utility model, and are used to illustrate the technical solution of the utility model, rather than limiting it, and the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that: any person familiar with the technical field within the technical scope disclosed in this utility model can modify the technical solutions described in the foregoing embodiments or can easily think of changes, or modify some of the technical features. Perform equivalent replacement; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the utility model, and should be covered within the protection scope of the utility model.

Claims (3)

1. The device for detecting the indexing error of the photoelectric shaft angle encoder is characterized by comprising a numerical control servo angle device (1) and a coupler (2), wherein the numerical control servo angle device (1) is coaxially connected with the photoelectric shaft angle encoder (3) to be detected through the coupler (2), and a signal processing unit (5) on the photoelectric shaft angle encoder (3) displays a rotation angle value generated by the photoelectric shaft angle encoder (3).

2. The apparatus for detecting the indexing error of an optoelectronic shaft angle encoder according to claim 1, further comprising a square-shaped parallel support mechanism (4), wherein the parallel support mechanism (4) comprises: the lower end part of the vertical supporting mechanism (41) is fixed on one side of the numerical control servo angle device (1), the upper end part of the vertical supporting mechanism (41) is fixedly connected with one end of the horizontal adjusting mechanism (42), the horizontal adjusting mechanism (42) is positioned above the photoelectric shaft angle encoder (3), and the vertical supporting mechanism (41) and the horizontal adjusting mechanism (42) are arranged in a mutually perpendicular mode.

3. A device for detecting indexing errors of an electro-optical shaft angle encoder according to claim 2, characterized in that the leveling mechanism (42) comprises a two-dimensional slide rail for adjusting the running axes of the electro-optical shaft angle encoder (3) and the numerical control servo angle device (1) to be coaxial, and the electro-optical shaft angle encoder (3) is connected to the two-dimensional slide rail.

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