Stage lamp with angle detection function

Abstract

The stage lamp with the angle detection function comprises a first driving wheel and a second driving wheel which are connected with the output end of a driving motor, the first driving wheel and the second driving wheel rotate synchronously, and the rotating axis of the first driving wheel and the rotating axis of the second driving wheel are located on the same straight line. The first driving wheel is in linkage with a first driven wheel used for driving the machine body part to rotate through a first transmission piece, and the second driving wheel is in linkage with a second driven wheel used for detecting the rotation angle through an angle detection device through a second transmission piece. According to the design scheme, the rotation angle of the second driven wheel is directly detected through the angle detection device so as to indirectly obtain the absolute rotation angle of the first driven wheel, and the first driven wheel and the second driven wheel both belong to first-stage transmission wheels, so that the transmission efficiency is high, no intermediate link exists, the power loss is small, and the cost is low. The detection error of the angle detection device is effectively reduced, and the accuracy of rotation angle detection is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stage lamp lighting, in particular to a stage lamp with angle detection function. BACKGROUND

[0002] A driving motor is installed in the stage lamp, and a driving wheel is connected to the output end of the driving motor. The driving wheel drives a driven wheel to rotate through a synchronous belt, thereby driving the stage lamp components connected to the driven wheel. The stage lamp components mainly include a lamp body head or a U-shaped support arm. In order to detect the rotation angle of the stage lamp components, an encoder is usually installed on the driving motor. The encoder can detect the rotation angle of the driving wheel and calculate the rotation angle of the stage lamp components through the transmission ratio between the driving wheel and the driven wheel. Generally, the number of teeth of the driving wheel is less than that of the driven wheel. If a single-turn absolute encoder is used for the encoder of the driving motor, the single-turn absolute encoder can only detect the 0-360° angle range of the driving wheel, and cannot completely detect the 0-360° rotation range of the driven wheel. Only part of the rotation angle can be detected, because the single-turn absolute encoder cannot detect the number of rotation turns. If a multi-turn absolute encoder is used for the encoder of the driving motor, the multi-turn absolute encoder can detect the number of rotation turns and the angle, but the cost is relatively high, the structure is complex, and the installation and maintenance costs are relatively high.

[0003] Of course, we can also use an incremental encoder, but this kind of incremental encoder needs a reference point to determine the absolute position. After power failure, the position information is lost and needs to be recalibrated, which is particularly cumbersome.

[0004] In the prior art, there is another angle design scheme as follows. The driven wheel is divided into a first driven wheel and a second driven wheel. The first driven wheel has a first primary driven wheel and a first secondary driven wheel. The first primary driven wheel and the first secondary driven wheel rotate synchronously, and the rotation axes of the first primary driven wheel and the first secondary driven wheel are on the same straight line. Specifically, the driving wheel of the driving motor is connected to the first primary driven wheel through a synchronous belt. Similarly, the first secondary driven wheel is connected to the second driven wheel through another synchronous belt. A magnetic encoder indirectly obtains the rotation angle of the first driven wheel by detecting the rotation angle of the second driven wheel. However, the second driven wheel belongs to a secondary transmission wheel, so the transmission efficiency is low, resulting in power loss in the intermediate link. The synchronous belt slips, which increases the detection error of the magnetic encoder and reduces the detection accuracy. SUMMARY

[0005] The present application provides a stage lamp with angle detection function, which can measure the rotation angle within 360 degrees, has simple structure, small angle detection error and low cost.

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] A stage lamp with angle detection function, comprising a first driving wheel and a second driving wheel connected with the output end of a driving motor, the first driving wheel and the second driving wheel rotate synchronously, and the rotation axis of the first driving wheel and the rotation axis of the second driving wheel are on the same straight line, the first driving wheel is connected with a first driven wheel for driving the rotation of a body component through a first transmission member, and the second driving wheel is connected with a second driven wheel for detecting the rotation angle of the angle detection device through a second transmission member.

[0008] Further limited, the transmission ratio between the first driving wheel and the first driven wheel is equal to the transmission ratio between the second driving wheel and the second driven wheel.

[0009] Further limited, the angle detection device detects the rotation angle range of the second driven wheel as 0-360°.

[0010] Further limited, the first transmission member and the second transmission member are both synchronous belts.

[0011] Further limited, the body component comprises a U-shaped support arm or / and a lamp body head.

[0012] Further limited, the angle detection device comprises a fixed plate fixedly arranged on the stage lamp, one end of the fixed plate is fixedly provided with a magnetic encoder, the other end of the fixed plate is fixedly provided with a fixed seat, the fixed seat is connected with the second driven wheel through a bearing to make the second driven wheel rotate relative to the fixed seat, the second driven wheel is provided with a magnetic steel which can rotate with it, and the magnetic encoder is opposite to the magnetic steel.

[0013] Further limited, the fixed seat is hollow inside to form a hollow cavity which penetrates up and down, the end surface of the second driven wheel is fixedly connected with a connecting plate, the connecting plate is fixedly provided with an extension seat which extends into the hollow cavity, and the magnetic steel is fixedly arranged at the extension end of the extension seat.

[0014] Further limited, the fixed plate is provided with a through hole, the inner side edge of the hollow cavity surrounds the outer peripheral edge of the through hole to make the through hole located in the hollow cavity, and the through hole is located between the magnetic encoder and the magnetic steel.

[0015] Further limited, the magnetic encoder is a single-turn absolute value encoder.

[0016] After adopting the above technical solutions, the present application has at least the following beneficial effects:

[0017] 1. The design scheme of the present application is to directly detect the rotation angle of the second driven wheel through the angle detection device, thereby indirectly obtaining the rotation angle of the first driven wheel. The first driven wheel and the second driven wheel are both primary transmission wheels, so the transmission efficiency is high, there is no intermediate link, the power loss is small, the angle detection error of the angle detection device is effectively reduced, and the accuracy of detecting the rotation angle is improved.

[0018] 2. The magnetic encoder is a single-turn absolute value encoder, which can detect the angle within 360 degrees, each position corresponds to a unique code, and no reference point is needed. After power failure, the current position can still be remembered without the need for recalibration; the structure is simple, high-precision and low-cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural diagram of a stage lamp;

[0020] Figure 2 is an exploded view of the angle detection device;

[0021] Figure 3 is a sectional view of the angle detection device. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict, and the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0023] As shown in Figure 1 to Figure 3 shown, a stage lamp with angle detection function comprises a first driving wheel 2 and a second driving wheel 3 connected with the output end of a driving motor 1, the first driving wheel 2 and the second driving wheel 3 rotate synchronously, and the rotation axis of the first driving wheel 2 and the rotation axis of the second driving wheel 3 are on the same straight line, the first driving wheel 2 is connected with a first driven wheel 5 for driving the rotation of the body component through a first transmission member 4, wherein the body component mainly comprises a U-shaped support arm or / and a lamp body head, and the U-shaped support arm or / and the lamp body head can be driven to rotate when the first driven wheel 5 rotates; preferably, the first transmission member 4 and the second transmission member 6 are both synchronous belts.

[0024] In this embodiment, the second driving wheel 3 is linked to a second driven wheel 7 via a second transmission component 6, which is used for the angle detection device 8 to directly detect the rotation angle. The angle detection device 8 can detect the rotation angle of the second driven wheel 7, and by calculating the transmission ratio, the rotation angle of the first driven wheel 5 can be indirectly obtained. The design scheme created by this invention is to directly detect the rotation angle of the second driven wheel 7 by the angle detection device 8, thereby calculating the absolute rotation angle of the first driven wheel 5. Both the first driven wheel 5 and the second driven wheel 7 are first-stage transmission wheels, so the transmission efficiency is high, there are no intermediate links, the power loss is small, the angle detection error of the angle detection device 8 is effectively reduced, and the accuracy of the detected rotation angle is improved.

[0025] In this embodiment, the transmission ratio between the first driving wheel 2 and the first driven wheel 5 is equal to the transmission ratio between the second driving wheel 3 and the second driven wheel 7. Thus, the rotation angle of the second driven wheel 7 detected by the angle detection device 8 is the same as the rotation angle of the first driven wheel 5, eliminating the need for complex formula conversions and facilitating program code programming. Specifically, the angle detection device 8 directly detects the rotation angle range of the second driven wheel 7 as 0-360°, and indirectly detects the rotation angle range of the first driven wheel 5 as well, which is also 0-360°.

[0026] As attached Figure 2 and attached Figure 3 As shown, the angle detection device 8 includes a fixed plate 81 fixedly mounted on a stage light. A magnetic encoder 83 is fixedly mounted on one end of the fixed plate 81, and a fixed base 82 is fixedly mounted on the other end of the fixed plate 81. The fixed base 82 is connected to the second driven wheel 7 via a bearing 84, allowing the second driven wheel 7 to rotate relative to the fixed base 82. The second driven wheel 7 is equipped with a magnet 87 that rotates with it. The magnetic encoder 83 is directly opposite the magnet 87. As the magnet 87 rotates with the second driven wheel 7, the magnetic encoder 83 can detect changes in the magnetic field of the magnet 87, thereby detecting the rotation angle of the second driven wheel 7. This structure is compact and relatively easy to install and debug.

[0027] In this embodiment, the fixed base 82 is hollow inside to form a hollow cavity 821 that runs vertically through the interior. A connecting plate 85 is fixedly connected to the end face of the second driven wheel 7. An extension base 86 extending into the hollow cavity 821 is fixedly provided on the connecting plate 85. The magnet 87 is fixedly provided at the extension end of the extension base 86, so that the magnet 87 provided at the extension end of the extension base 86 is closer to the magnetic encoder 83, thereby increasing the sensing sensitivity.

[0028] In the embodiment, the fixing plate 81 is provided with a through hole 810, the inner side edge of the hollow cavity 821 surrounds the outer peripheral edge of the through hole 810, so that the through hole 810 is located in the hollow cavity 821, and the through hole 810 is located between the magnetic encoder 83 and the magnetic steel 87, so that the magnetic force induction between the magnetic encoder 83 and the magnetic steel 87 is not affected by the thickness change of the fixing plate 81, and the magnetic force induction sensitivity is effectively maintained.

[0029] In the embodiment, the magnetic encoder 83 is a single-turn absolute value encoder, which can detect the absolute angle in a 360-degree range, each position corresponds to a unique code, and a reference point is not required; the current position can be remembered after power-off, and recalibration is not required; the structure is simple, high-precision, and low-cost.

[0030] Although the embodiments of the present application have been shown and described, it is to be understood that various equivalents, modifications, substitutions and changes can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A stage lamp with angle detection function, comprising a first driving wheel (2) and a second driving wheel (3) connected with the output end of a driving motor (1), the first driving wheel (2) and the second driving wheel (3) rotate synchronously, and the rotation axis of the first driving wheel (2) and the rotation axis of the second driving wheel (3) are on the same line, the first driving wheel (2) is linked with a first driven wheel (5) for driving the rotation of the body component through a first transmission member (4), characterized in that, The second driving wheel (3) is linked with a second driven wheel (7) through a second transmission member (6), and the second driven wheel (7) is provided with an angle detection device (8) for detecting the rotation angle thereof.

2. The stage light of claim 1, wherein The transmission ratio between the first driving wheel (2) and the first driven wheel (5) is equal to the transmission ratio between the second driving wheel (3) and the second driven wheel (7).

3. The stage light of claim 2, wherein The angle detection device (8) detects the rotation angle range of the second driven wheel (7) as 0-360°.

4. The stage light of claim 1, wherein The first transmission member (4) and the second transmission member (6) are both synchronous belts.

5. The stage light of claim 1, wherein The machine body part comprises a U-shaped support arm or / and a lamp body head.

6. The stage light according to any one of claims 1 to 5, characterized in that, The angle detection device (8) comprises a fixed plate (81) fixedly arranged on the stage lamp, one end of the fixed plate (81) is fixedly provided with a magnetic encoder (83), the other end of the fixed plate (81) is fixedly provided with a fixed seat (82), the fixed seat (82) is connected with the second driven wheel (7) through a bearing (84) to make the second driven wheel (7) rotate relative to the fixed seat (82), the second driven wheel (7) is provided with a magnetic steel (87) rotatable therewith, and the magnetic encoder (83) is opposite to the magnetic steel (87).

7. The stage light of claim 6, wherein The fixed seat (82) is hollow inside to form a hollow cavity (821) penetrating from top to bottom, the end surface of the second driven wheel (7) is fixedly connected with a connecting plate (85), the connecting plate (85) is fixedly provided with an extension seat (86) extending into the hollow cavity (821), and the magnetic steel (87) is fixedly arranged at the extension end of the extension seat (86).

8. The stage light of claim 7, wherein, The fixed plate (81) is provided with a through hole (810), the inner side edge of the hollow cavity (821) surrounds the outer peripheral edge of the through hole (810) to make the through hole (810) located in the hollow cavity (821), and the through hole (810) is located between the magnetic encoder (83) and the magnetic steel (87).

9. The stage light of claim 6, wherein, The magnetic encoder (83) is a single-turn absolute value encoder.

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