Self-powered multi-turn encoder

Abstract

A self-powered multi-turn encoder comprises a casing, a main shaft, a radial magnet and a circuit board, one end of the main shaft extends into the casing and is rotatably connected with the casing through a bearing, the radial magnet is fixedly arranged at the end, extending into the casing, of the main shaft, the circuit board is fixedly arranged in the casing, and a Hall chip, a storage chip, a single chip microcomputer and an energy storage battery are arranged on the circuit board. The Hall chip and the radial magnet are correspondingly arranged, a photosensitive power panel and a plug connector are arranged on the machine shell, and the single-chip microcomputer is connected with the Hall chip, the storage chip, the energy storage battery, the photosensitive power panel and the plug connector at the same time. According to the self-powered multi-turn encoder provided by the utility model, the adopted silicon-based photosensitive power panel has very high reliability and stability, can ensure that the encoder can accurately record correct angles and turn values no matter how long a power failure gap exists, and can feed back correct real-time position information when a system recovers normal power supply.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial automation, in particular to a self-powered multi-turn encoder. Background Art

[0002] There are battery-only encoder power-off protection solutions on the market, but due to the high power consumption of the circuit board and the lack of battery life management, in most cases, it is impossible to truly record the position information when the power is off. Traditional encoders rely on the power cord in the connector to power the circuit board. After the power is off, the general multi-turn encoder can record the number of turns and angle values ​​before the power is off. When the system is powered on, the encoder will send the number of turns and angle positions recorded during the power outage based on the information in the storage chip. However, in most cases, the machine equipment will continue to operate for a period of time after the power is off for various reasons, causing the position information stored in the storage chip to be inconsistent with the actual situation. Or after the power is off, there are manual operations. These operations cannot record the current position when the encoder is powered off, and also cause the position information stored in the storage chip to be inconsistent with the actual situation. If the above situation occurs, the system cannot make the correct position positioning when the power is on, and must reset itself and start again. This will cause a huge waste of production. In some special industries, it is impossible to reset automatically, and it is necessary to have an encoder that can record the position when the power is off.

[0003] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a self-powered multi-turn encoder to solve the above problems. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the utility model aims to provide a self-powered multi-turn encoder.

[0005] To achieve the above-mentioned purpose and other related purposes, the technical solution provided by the utility model is: a self-powered multi-turn encoder, comprising a casing, a spindle, a radial magnet and a circuit board, one end of the spindle extends into the casing and is rotatably connected to the casing through a bearing, the radial magnet is fixed to the end of the spindle extending into the casing, the circuit board is fixed in the casing, a Hall chip, a memory chip, a single-chip microcomputer and an energy storage battery are provided on the circuit board, the Hall chip and the radial magnet are correspondingly arranged, a photosensitive power board and a connector are provided on the casing, and the single-chip microcomputer is simultaneously connected to the Hall chip, the memory chip, the energy storage battery, the photosensitive power board and the connector.

[0006] The preferred technical solution is: the casing is constructed as a barrel-shaped structure and has an opening at one end, an end cover is provided at the opening, an axial hole for the main shaft to pass through is provided on the end cover, and the main shaft is arranged in the casing through the axial hole.

[0007] The preferred technical solution is: a first mounting hole is provided on the housing, and the photosensitive power supply board is sealed and installed in the first mounting hole through a first sealing ring.

[0008] A preferred technical solution is: a second mounting hole is provided on the housing, and the connector is sealed and installed in the second mounting hole through a second sealing ring.

[0009] The preferred technical solution is: a pin header is provided on the circuit board, the pin header is connected to the single-chip microcomputer, the connector is connected to a female header via a wiring harness, and the female header and the pin header are detachably connected.

[0010] Due to the application of the above technical solution, the utility model has the following beneficial effects:

[0011] The utility model provides a self-powered multi-turn encoder, which adopts a silicon-based photosensitive power supply board with very high reliability and stability, and can ensure that the encoder can accurately record the correct angle and turn values ​​no matter how long the power outage is. When the system resumes normal power supply, the encoder can feedback the correct real-time position information. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a schematic diagram of the structure of a self-powered multi-turn encoder.

[0013] Figure 2 The utility model is a schematic diagram of the internal structure of the self-powered multi-turn encoder. DETAILED DESCRIPTION

[0014] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0015] See also Figure 1-Figure 2. It should be noted that in the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0016] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] Example:

[0018] like Figure 1 As shown, according to an overall technical concept of the utility model, a self-powered multi-turn encoder is provided, including a housing 1, a spindle 2, a radial magnet 3 and a circuit board 4. One end of the spindle 2 extends into the housing 1 and is rotatably connected to the housing 1 through a bearing 5. The radial magnet 3 is fixedly arranged at the end of the spindle 2 extending into the housing 1. The circuit board 4 is fixedly arranged in the housing 1. A Hall chip 6, a memory chip 7, a single-chip microcomputer 8 and an energy storage battery 9 are arranged on the circuit board 4. The Hall chip 6 and the radial magnet 3 are arranged correspondingly. A photosensitive power supply board 10 and a connector 11 are arranged on the housing 1. The single-chip microcomputer 8 is connected to the Hall chip 6, the memory chip 7, the energy storage battery 9, the photosensitive power supply board 10 and the connector 11 at the same time.

[0019] like Figure 1 to Figure 2 As shown, in an exemplary embodiment of the utility model, the casing 1 is constructed as a barrel-shaped structure and has an opening at one end, an end cover (not shown) is provided at the opening, and an axial hole for the main shaft 2 to pass through is provided on the end cover, and the main shaft 2 is arranged in the casing 1 through the axial hole.

[0020] like Figure 1 to Figure 2As shown, in an exemplary embodiment of the present utility model, a first mounting hole is provided on the housing 1, and the photosensitive power supply board 10 is sealed and installed in the first mounting hole through a first sealing ring.

[0021] like Figure 1 to Figure 2 As shown, in an exemplary embodiment of the present utility model, a second mounting hole is provided on the housing 1, and the plug-in component 11 is sealed and installed in the second mounting hole through a second sealing ring.

[0022] like Figure 1 to Figure 2 As shown, in an exemplary embodiment of the utility model, a pin header 12 is provided on the circuit board 4, the pin header 12 is connected to the single-chip computer 8, the connector 11 is connected to a female header (not shown) through a wiring harness, and the female header and the pin header 12 are detachably connected.

[0023] This solution provides energy to the encoder through the photosensitive power board 10 when the power is off. The photosensitive power board 10 is a device that can convert light and natural light into electrical energy. It is usually made of semiconductor materials such as silicon. Its basic principle is the photovoltaic effect, that is, when light shines on the semiconductor material, electrons are excited to generate current. Specifically, there is a PN junction inside the photosensitive plate power board 10. When light shines on the PN junction, electron-hole pairs are generated, thereby forming a potential difference and generating current. This process can only occur under the irradiation of light and natural light. In addition, the photosensitive plate power board 10 has a long life and high reliability, and can work stably throughout the life cycle of the encoder.

[0024] Under light or natural light, the photosensitive power board 10 generates electric energy, which is provided to the single-chip computer 8, the Hall chip 6 and the memory chip 7 for stable power supply through the voltage stabilizing circuit. The single-chip computer 8, the Hall chip 6 and the memory chip 7 all have normal working mode, low power consumption mode and sleep mode. Under normal light or natural light intensity, the design power of the photosensitive power board 10 is greater than the power required by the entire circuit board 4 in normal working mode. Considering the intensity of light, there is also an energy storage battery 9 on the circuit board 4. When the photosensitive power board 10 is powered on and working normally, it will detect the power of the energy storage battery 9, maintain a certain power of the energy storage battery 9 and optimize the number of charge and discharge times of the energy storage battery 9. In the case of power failure, the Hall chip 6 is in a low power consumption state (0.14uA), maintaining the detection of the change of the angle of the main shaft 2 and the radial magnet 3 at an extremely low power consumption. The single-chip computer 8, the memory chip 7 and the like are in a sleep state, and the power consumption of these components is much less than the power provided by the photosensitive power board 10 under different working conditions. When the power is off, the angle between the main shaft 2 and the radial magnet 3 changes. The Hall chip 6 monitors the angle change and sends a signal in real time to wake up the single-chip microcomputer 8, the memory chip 7, etc. The Hall chip 6 then sends the latest angle to the single-chip microcomputer 8, which obtains the accurate angle value and number of turns through correction calculation. When the power is off and the spindle 2 has no angle change for a certain period of time, the single-chip microcomputer 8 sends a storage command to store the latest angle and number of turns in the memory chip 7. Then, the Hall chip 6 returns to the low power consumption state, and the single-chip microcomputer 8 and the memory chip 7 re-enter the sleep state. The above is the working scheme of the self-powered encoder.

[0025] At the same time, in order to achieve environmental tolerance, sealing rings are provided at the connection between the housing 1 of this product and the connector 11 and the photosensitive power supply board 10, and an end cover 12 is added to the bearing end of the housing 1 to improve the product protection level.

[0026] Therefore, the utility model has the following advantages:

[0027] The utility model provides a self-powered multi-turn encoder, which adopts a silicon-based photosensitive power supply board with very high reliability and stability, and can ensure that the encoder can accurately record the correct angle and turn values ​​no matter how long the power outage is. When the system resumes normal power supply, the encoder can feedback the correct real-time position information.

[0028] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A self-powered multi-turn encoder, characterized in that: It includes a casing, a main shaft, a radial magnet and a circuit board. One end of the main shaft extends into the casing and is rotatably connected to the casing through a bearing. The radial magnet is fixedly arranged at the end of the main shaft extending into the casing. The circuit board is fixedly arranged in the casing. A Hall chip, a memory chip, a single-chip microcomputer and an energy storage battery are arranged on the circuit board. The Hall chip and the radial magnet are arranged correspondingly. A photosensitive power supply board and a connector are arranged on the casing. The single-chip microcomputer is simultaneously connected to the Hall chip, the memory chip, the energy storage battery, the photosensitive power supply board and the connector.

2. A self-powered multi-turn encoder according to claim 1, characterized in that: The casing is constructed as a barrel-shaped structure and is provided with an opening at one end. An end cover is provided at the opening. The end cover is provided with an axial hole for the main shaft to pass through. The main shaft is arranged in the casing through the axial hole.

3. A self-powered multi-turn encoder according to claim 1, characterized in that: The housing is provided with a first mounting hole, and the photosensitive power supply board is sealed and installed in the first mounting hole through a first sealing ring.

4. A self-powered multi-turn encoder according to claim 1, characterized in that: The housing is provided with a second mounting hole, and the plug-in component is sealed and mounted in the second mounting hole via a second sealing ring.

5. The self-powered multi-turn encoder according to claim 1, characterized in that: The circuit board is provided with a pin header, the pin header is connected to the single-chip microcomputer, the connector is connected to a female header through a wiring harness, and the female header and the pin header are detachably connected.

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