TWM551226U - Absolute encoding device - Google Patents

Description

Absolute coding device

The present invention relates to an encoding device, and more particularly to an absolute rotary encoding device.

Conventional encoders are used in a wide range of applications. In the field of electric roller shutters or elevators, technologies for reading and judging the position of the rolling door or the elevator are also developed. For example, the Republic of China No. M393568 "has a digital limit. The new patent of the electric rolling door machine with control function has an extreme position detecting module in the machine body. When the electric motor drives the rolling door turntable to rotate, the cutting wheel will be rotated synchronously, so that the cutting structure thereon periodically passes through the sensor. The sensor generates a coded signal related to the lifting and lowering stroke of the rolling door. With the digital coding technology, the upper and lower limit positions can be set conveniently, flexibly and accurately without the need of a mechanical limit switch. In addition, the Republic of China No. I546444 "Iron Rolling Door" The application of the electronic Gray code driving device discloses an application of a Gray code driving device, which includes a main body base, a transmission unit and a torque detecting unit, and the main body base is provided with a control electric motor The digital module of the operation mode, the torque detecting unit is synchronously generated by the gear unit when the transmission unit is running. In order to achieve the precise positioning of the iron roll door, the invention patent of the Republic of China No. I516670 "door system with roll door instant position detection device" also discloses similar use of Gray code coding technology. A technique for detecting the position of an electric rolling door.

However, the above listed technology has the following common problem: the Gray code is generated in a manner that utilizes an encoder disk with a through hole directly on the disk surface, or an occlusion code for setting a curved barrier wall on a rotating wheel. The wheel, each ring code is only correspondingly provided with a reading device; for example, the aforementioned invention patent No. I546444, the turntable is based on the center position, and is formed with a plurality of curved lengths on the surface. a slot (ie, a ring of coded loops), the digital sensing module has a signal light source corresponding to one side of the turntable and a signal receiver (ie, a set of reading devices) corresponding to the other side of the turntable, that is, each A set of code rings is only provided with a set of reading devices, and the wheel must be rotated by a number of bits to enable the reading device to obtain a complete position information to determine the position of the roll door.

For example, when the address of each memory location has 6 bits (for example, 010010), the reading device first reads a 0, and then the motor must rotate to drive the turntable to rotate, so that the reading device can continue to the back of the 10010, etc. Bits, and the motor must continue to rotate so that the reading device can continue to read the 6 bits of the next location address to determine the direction of rotation. The applicant has previously announced the same problem with M510972 "Inductive Positioning System for Rolling Doors". When the rolling door mechanism is running, the motor must be rotated by a certain angle to read the exact position and the rotating direction of the rolling door. If the rolling door is completely lowered to the ground at this time, or the full roll receives the terminal position, at this time, Continued rotation of the motor may result in damage to the mechanism.

In view of this, it is necessary to propose an improved absolute encoding device to improve the problem that the industry is eager to solve.

The purpose of this creation is to provide an absolute encoding device that can instantly read the correct position.

In order to achieve the above object, an absolute encoding device of the present invention comprises a base, and the base is pivotally provided with a first encoder wheel and a second encoder wheel. The first encoder wheel is provided with a first coding ring, and the second The encoder wheel is provided with a second encoder ring; a light shutter and a lower shutter are respectively disposed on two sides of the first encoder wheel and the second encoder wheel, wherein the lower shutter is provided with a plurality of first illuminators and a plurality of a second illuminator, the illuminating shutter is provided with a plurality of first illuminators and a plurality of second illuminators, and the plurality of first illuminators and the plurality of first illuminators correspond to the first coding ring, the plurality of second illuminators and The plurality of second photoreceivers correspond to the second coding ring, and the plurality of first photoreceivers and the plurality of second photoreceivers can simultaneously read the codes on the first coding ring and the second coding ring to form a string of absolute codes, and The string absolute code is sent by an electrical connector.

The first coding ring and the second coding ring form a binary code with an open hole position and a closed hole position.

Wherein, the outer circumferences of the first encoder wheel and the second encoder wheel are provided with teeth that mesh with each other.

Wherein, the number of teeth of the first encoder wheel and the number of teeth of the second encoder wheel are relatively prime.

Wherein, the first encoder wheel, the second encoder wheel and the lower shutter are provided with a lower visor, and the lower visor is provided with a plurality of first lower channels corresponding to the plurality of first illuminators, and corresponding plurality of a plurality of second lower channels of the second illuminator; an upper visor is disposed between the first encoder wheel, the second encoder wheel and the upper shutter, and the upper visor is provided with a plurality of first corresponding to the plurality of first receivers The upper channel and the plurality of second upper channels corresponding to the plurality of second photoreceivers.

Wherein, the lower shutter plate and the upper shutter are electrically connected by a copper pillar.

The lower shutter plate is provided with at least four first illuminators and at least four second illuminators, and the upper shutter is provided with at least four first illuminators and at least four second illuminators.

Wherein, the lower shutter plate is provided with six first illuminators and six second illuminators, and the upper shutter plate is provided with six first illuminators and six second illuminators.

Wherein, the number of teeth of the first encoder wheel is 64 teeth, and the number of teeth of the second code wheel is 63 teeth.

In this way, the present invention provides an absolute encoding device that can instantly read the correct position.

1‧‧‧Rolling door rolling mechanism

10‧‧‧ motor

11‧‧‧Rolling axis

12‧‧‧ Gears

13‧‧‧Combination hole

2‧‧‧Absolute coding device

21‧‧‧Base

211‧‧‧ cover

212‧‧‧bond hole

213‧‧·wheel seat

214‧‧‧Positioning column

215‧‧‧Dust cover

216‧‧‧ screws

31‧‧‧First code wheel

311‧‧‧Axle

312‧‧‧ first coding ring

3120‧‧‧Closed hole

3121‧‧‧ opening position

313‧‧‧ teeth

32‧‧‧Second code wheel

321‧‧‧ axle

322‧‧‧Second code ring

3220‧‧‧Closed hole

3221‧‧‧ opening position

323‧‧‧ teeth

33‧‧‧ shaft bolt

331‧‧‧shims

41‧‧‧Upper shutter

411A‧‧‧First Receiver

411B‧‧‧second receiver

412‧‧‧Electrical connector

42‧‧‧ Lower shutter

421A‧‧‧First illuminator

421B‧‧‧second illuminator

43‧‧‧ copper pillar

431‧‧‧ nuts

432‧‧‧Metal screws

51‧‧‧Upper visor

511A‧‧‧first upper channel

511B‧‧‧Second upper channel

512‧‧‧ pads

52‧‧‧lower visor

521A‧‧‧First down channel

521B‧‧‧Second lower channel

522‧‧‧ blocks

101011‧‧‧Code

001010‧‧‧Code

Figure 1. Schematic diagram of the application of the absolute coding device to the rolling door mechanism.

Figure 2 is an exploded perspective view of the absolute encoding device of the present invention.

Figure 3 is a partial exploded view of the absolute encoding device of the present invention.

Figure 4 is a three-dimensional partial combination diagram of the absolute coding device of the present invention.

Figure 5 is a front view of the combination of the absolute coding device of the present creation.

Figure 6 is a cross-sectional view taken along line A-A of Figure 5 of the present creation.

Figure 7. A partial combined front view of an absolute encoding device.

Fig. 8 is a schematic diagram showing the operation of the absolute coding device and the coding generation diagram.

The embodiment may be used to illustrate the possible implementation of the creation, but it is not intended to limit the scope of the creation of the creation. The technical means and structural features used in this creation for the purpose of creation are to be accompanied by the schema. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The detailed description is as follows: Referring to FIG. 1 , a schematic diagram of the present invention applied to a rolling door mechanism is disclosed. The present invention discloses an absolute encoding device 2 that can be coupled to a device that requires a reading position, for example, the present embodiment. The system is coupled to a roll shutter mechanism 1 . The roll door rolling mechanism 1 generally includes a motor 10 having a scroll shaft 11 for connecting the take-up reel of the roll door to rewind or lower the roll door. This part is not described in detail in the prior art. The scrolling shaft 11 is coupled to a gear 12 for driving the absolute encoder device 2. The gear 12 preferably transmits the rotational torque by the gear, so that it is convenient to calculate the gear ratio by the number of teeth of the gear, but It is also possible to replace the gear by means of a pulley or a friction wheel. The roll shutter mechanism 1 can be provided with a plurality of coupling holes 13 for the fixed coding device 2 to be fixedly coupled.

The absolute encoder device 2 is fixed to one side of the roll door rolling mechanism 1, and the internal mechanism of the absolute encoder device 2 is driven by the power transmitted from the gear 12 on the scroll shaft 11. The detailed structure of the absolute encoder device 2 is as follows: 2 is an exploded perspective view of the absolute encoding device of the present invention. The absolute encoding device 2 includes a base 21. The base 21 is preferably, but not limited to, integrally formed of a plastic material, and can be extended with a cover plate 211 and a cover plate. The 211 is provided with a plurality of coupling holes 212, and the absolute coding device 2 is coupled to the coupling hole 13 of the roll door rolling mechanism 1 through a plurality of screws 216 (see also FIG. 1). The base 21 is further combined with a dust cover 215 for shielding. The internal components are used to prevent dust and insects from entering, and the dust cover 215 and the base 21 can be fixed by screws 216. The base 21, the cover 211, the coupling hole 212, and the dust cover 215 are generally general-purpose housings. Using the means or design, the shape and quantity in the drawing can match the motor machine The structure of the shell or the rolling door mechanism is modified to not limit the scope of the creation. The base 21 is provided with a two-wheel base 213 and at least one positioning post 214. The two wheel bases 213 are respectively pivotally provided with a first encoder wheel 31 and a first The second encoder wheel 32, in the embodiment, the first and second encoder wheels 31, 32 are gears, and the second encoder wheel 32 is meshed with the gear 12 of the roller shutter mechanism 1 and is subjected to gears. 12 is rotationally driven, and the second encoder wheel 32 is again engaged with the first encoder wheel 31 and drives the first encoder wheel 31 to rotate. The gear 12, the first encoder wheel 31, and the second encoder wheel 32 preferably transmit a rotational torque by a gear, so that it is convenient to calculate the transmission ratio by the number of teeth of the gear, and also facilitate the coding arrangement, but if a pulley or a friction wheel is used, The way to replace the gear to transmit power can also achieve the same effect, should be regarded as equivalent use.

The first encoder wheel 31 and the second encoder wheel 32 are respectively provided with a wheel axles 311 and 321 respectively pivoted on the two wheel bases 213 of the base 21. The axles 311 and 321 can be provided with shaft holes (not shown) to be stably sleeved. The wheel base 213 rotates, the axles 311, 312 and the wheel base 213 are pivoted to each other, and the "shaft hole" and "axle" structures can be replaced with each other; the first code wheel 31 is provided with a first coding ring on the wheel surface. 312, and the outer circumference of the wheel is provided with a plurality of teeth 313, the first coding ring 312 is provided with a plurality of openings, which represent 1 and 0 (or 0 and 1) with open and closed positions to generate a binary code, the binary code Preferably, but not limited to, it is a Gray code; a second encoder ring 322 is disposed on the wheel surface of the second encoder wheel 32, and a plurality of gear teeth 323 are disposed on the outer circumference of the wheel, and the second code ring 322 is provided with a plurality of openings. a hole, which represents 1 and 0 (or 0 and 1) with open and closed positions to generate a binary code, which is preferably, but not limited to, a Gray code; the first code wheel 31 and The number of teeth of the teeth 313 and 323 of the second encoder wheel 32 is different. In the embodiment, the number of teeth 313 of the first encoder wheel 31 is 64. The number of teeth of the teeth 323 of the second encoder wheel 32 is 63 teeth, but is not limited to the aforementioned number of teeth. The number of teeth of the teeth 313 and 323 of the first encoder wheel 31 and the second encoder wheel 32 is a prime number, the wheel The arrangement of the number of teeth is such that the two encoder wheels that are engaged can generate a plurality of different address combinations. Taking the 64 teeth and the 63 teeth of the embodiment as an example, the first tooth and the second encoder wheel 32 of the first encoder wheel 31 are 32. After the first teeth are engaged and rotated, the first teeth of each other must be re-engaged after the contact of the 4032 (64X63=4032) teeth. Therefore, 4032 sets of address codes can be generated. Place The first encoder wheel 31 and the second encoder wheel 32 are respectively locked to the two wheel base 213 by a shaft pin 33 and a washer 331 .

Referring to FIG. 2 to FIG. 5 , a light shutter 41 and a lower shutter 42 are respectively disposed on two sides of the first encoder wheel 31 and the second encoder wheel 32 . The upper shutter 41 and the lower shutter are respectively disposed. The board 42 is preferably a circuit board (PCB). The lower shutter 42 is provided with a plurality of first illuminators 421A and a plurality of second illuminators 421B. The plurality of first illuminators 421A correspond to the first encoder wheel 31. The position of the first encoder ring 312 and the position of the plurality of second illuminators 421B corresponding to the second encoder ring 322 of the second encoder wheel 32. In this embodiment, the first illuminator 421A and the second The number of the illuminators 421B is six, but the number is not limited thereto, and may be changed by the number of coded addresses; the upper shutter 41 is disposed on the other side opposite to the lower shutter 42. It has a plurality of first photoreceivers 411A and a plurality of second photoreceivers 411B, the plurality of first photoreceivers 411A corresponding to the position of the first encoder ring 312 of the first encoder wheel 31, and the plurality of second photoreceivers 411B corresponds to the position of the second encoder ring 322 of the second encoder wheel 32. In this embodiment, the number of the first illuminator 421A and the second illuminator 421B Corresponding to the first and second illuminators 421A, 421B are also six, but the number is not limited thereto, and it can also be changed by referring to the change of the number of coding addresses.

The plurality of first illuminators 421A and the plurality of second illuminators 421B are a kind of illuminating elements, which may be, but are not limited to, various light-emitting elements that can emit light sources, such as a light bulb or a light-emitting diode (LED) or an infrared illuminator; The plurality of first photoreceivers 411A and the plurality of second photoreceivers 411B are a type of photodetector, which may be, but not limited to, a light-receiving component capable of sensing light, such as a photoelectric crystal, a photodiode or a photoresistor, each of which is first The illuminator 421A and the corresponding first photoreceiver 411A form an optocoupler, that is, a pair of optical couplers are formed, and each pair of optical couplers is spaced apart from the first encoder wheel 31 and corresponding to the position of the first encoder ring 312; Each of the second illuminators 421B and the corresponding second photoreceivers 411B forms an optocoupler, that is, a pair of optical couplers are formed, and each pair of optical couplers is separated by a second encoder wheel 32 and corresponding to the second code ring. Position of 322, in this embodiment, six first illuminators 421A and six first photoreceivers 411A The six photocouplers are formed; the six second illuminators 421B and the six second photoreceptors 411B form six optical couplers, and the total has twelve optical couplers.

The upper shutter 41 is provided with an electrical connector 412, which is generally referred to as a connector for use on an electronic signal and a power source. The electrical connector 412 can be electrically connected to a controller (not shown). The optocoupler power supply can be provided through the electrical connector 412, and a string of absolute codes formed by the first code ring read by the first photoreceiver 411A and the second photoreceiver 411B and the code on the second code ring can be absolutely encoded. The electrical connector is output to the controller for interpretation calculation. Since the lower shutter 42 is not directly electrically connected to the electrical connector 412, the power can be led from the upper shutter 41 to the lower shutter 42 through an electrical cable (not shown) to provide the The power supplies required for the plurality of first illuminators 421A and the second illuminators 421B, or as shown in FIG. 2, are locked to the upper shutter 41 by two copper posts 43, two nuts 431 and two metal screws 432. At the electrical contact of the lower shutter 42 , since the first illuminator 421A and the second illuminator 421B only need to continuously emit light and do not need complicated wiring, the components such as the two copper pillars 43 can be used. The upper shutter 41 is electrically connected to the lower shutter 42 to supply a DC power supply to the lower shutter 42.

The first encoder wheel 312 and the second encoder ring 322 are cyclically rotated by the first encoder wheel 312 and the second encoder ring 322 by the first encoder wheel 31 and the second encoder wheel 32, and the first receiver 411A and the second receiver are rotated. The light receiver 411B senses the code change and can output a binary address code, but in order to prevent the adjacent illuminators or the light receiver from being interfered with by the dissipated light, preferably, the first encoder wheel 31 and the second can be further A lower visor 52 is disposed between the encoder wheel 32 and the lower shutter 42. The lower visor 52 is provided with a plurality of first lower passages 521A and a plurality of second lower passages 521B, and the number of the first lower passages 521A is the same. The number of the plurality of first illuminators 421A, and each of the first lower channels 521A corresponds to a first illuminator 421A, and the number of the plurality of second lower channels 521B is the same as that of the plurality of second illuminators 421B. The number, and each of the second lower channels 521B corresponds to a second illuminator 421B; similarly, an upper visor 51 is added between the first encoder wheel 31, the second encoder wheel 32 and the upper shutter 41. The upper visor 51 is provided a plurality of first upper channels 511A and a plurality of second upper channels 511B, the number of the plurality of first upper channels 511A being the same as the number of the plurality of first light receptors 411A, and each of the first upper channels 511A corresponding to one The first photoreceiver 411A has the same number of the second upper channels 511B than the number of the second photoreceivers 411B, and each of the second upper channels 511B corresponds to a second photoreceiver 411B; A plurality of spacers 512 may be disposed on the edge of the panel 51, and the plurality of spacers 522 are correspondingly disposed on the lower visor 52. The corresponding spacers 512 and 522 are slightly adjacent to each other and have a thickness slightly larger than the first encoder wheel 31 and the second code. The thickness of the wheels 32 is such that they can be properly spaced to avoid interference with each other. The upper shutter 41, the upper visor 51, the lower visor 52, and the lower shutter can be fixed to the positioning post 214 of the base 21 by screws 523.

Referring to FIG. 6 at the same time, FIG. 5 is a cross-sectional view taken along line AA of FIG. 5. Each of the first illuminators 421A corresponds to a first photoreceiver 411A, and corresponds to the position of the first encoder ring 312 of the first encoder wheel 31. The first upper channel 511A of the visor 51 and the first lower channel 521A of the lower visor 52 are also located at corresponding positions, and the shielding by the visor can avoid interference caused by the dissipation of adjacent light, so that each of the first photoreceptors 411A does not The erroneous message is sensed; likewise, each of the second illuminators 421B corresponds to a second photoreceiver 411B, and corresponds to the second encoder ring 322 of the second encoder wheel 32, while the second opaque plate 51 is on the second The channel 511B and the second lower channel 521B of the lower visor 52 are also located at corresponding positions, and the shielding by the visor can avoid interference caused by the dissipation of adjacent light, so that each second receiver 411B does not sense an erroneous message.

Referring to FIG. 7, a partial combination front view of the absolute coding apparatus is created. The first coding ring 312 of the first encoder wheel 31 is composed of a plurality of closed-hole positions 3120 and a plurality of apertures 3121, each of which is 3120 or The aperture 3121 represents a bit. Similarly, the second encoder ring 322 of the second encoder wheel 32 is composed of a plurality of closed-hole positions 3220 and a plurality of apertures 3221, each of which is 3220 or The opening position 3221 represents a bit. In this embodiment, the closed area 3120 of the first coding ring 312 and the open position 3121 total 64, that is, the first coding ring 312 is equally divided into 64 bits, which is the same as the number of the teeth 313. It is convenient to calculate the position of the bit but it is not necessary. The closed hole position 3120, 3220 or the opening position 3121, 3221 is the smallest It is 1 bit length and the longest is 6 consecutive bit lengths; the continuous bit length is mainly set according to the corresponding number of optical couplers.

As described above, any of the first illuminators 421A of the present invention and the corresponding first photoreceiver 411A constitute a pair of optical couplers, and at least two optical couplers are required corresponding to the first encoder wheel 31, so that simultaneous reading can be performed. At least two bit data, in the embodiment, there are six optical couplers corresponding to the first encoder wheel 31. When the light of the first illuminator 421A can pass through the opening position 3121, the first photodetector 411A can sense the light. The line is sent to a one-digit value of 1; conversely, when the light of the first illuminator 421A is blocked by the closed-hole position 3120 so that the first photo-receiver 411A cannot sense the light, it is sent a one-dimensional value of 0, Referring to FIG. 7, the value of a string of 6 bits can be read immediately from left to right in the first encoder wheel 31 to 101011. As with the foregoing principle, the second encoder wheel 32 can be read immediately from left to right. Take a string of 6 bits with a value of 001010. Since the values of the two strings of 6 bits are simultaneously read, the two strings of values can be directly added to obtain a 12-bit address of 101011001010. The present invention is applied to the embodiment of the roll-to-roll device in the motor. 10 can read a 12-bit address without starting the rotation. The 12-bit address is equivalent to the absolute position code of a roll door address. It can be instantly known when the motor stops rotating. The exact position of the rolling door, therefore, even if the power is restored or the fault is repaired after the power failure, the absolute position code can be obtained as soon as the power is restored, and when the absolute coding device 2 is used in the rolling door rolling mechanism, That is, the exact position of the roll door can be instantly known; compared to each code ring, only a set of optical couplers can be configured, and only one bit of data can be read at a time, and power failure or failure recovery occurs. In power, the controller must rotate the motor a few bits to obtain a complete set of address codes to confirm the position of the roll door, which may cause damage to the roll door mechanism.

Please also refer to Figure 7~8. After the absolute encoding device reads the current instantaneous position, it only needs to make the controller start the motor to rotate one bit in either direction to read another adjacent group. 12-bit encoding, that is, the next set of address codes can be obtained by rotating the distance of one bit to confirm the steering of the roll door. Referring to the direction shown in FIG. 8, the first encoder wheel 31 rotates one bit clockwise. Yuan corner The second encoder wheel 32 simultaneously rotates the angle of one bit counterclockwise, and the optical coupler composed of the position of the first illuminator 421A and the corresponding first photoreceiver 411A can read the new value 010110 immediately. The photocoupler composed of the position of the second illuminator 421B and the corresponding second photoreceiver 411B under the same plane can instantly read the new value as 010100, and add the two strings of values to obtain a set of 1211011010100. The new address of the bit; in this embodiment, the walking distance of each bit is less than 1 mm, and the damage of the mechanism is not caused even if the roll door has been lowered to the end or the end of the roll is received. The decision on the number of bits to be encoded or the number of optocouplers is as follows: Applying this creation to the rolling door device of a general building, the more absolute coding divisions of the roll door position, the more accurate position information can be obtained. For example, a 2.5 mm height roll door is used to convert a smaller unit to 2500 mm. The first encoder wheel 31 of the foregoing embodiment 64 tooth and the 63 tooth second code wheel 32 can be set to 64X63=4032 address code, 2500 mm division. The number of 4032 addresses is 0.62mm, that is, the adjacent two addresses are only 0.62mm apart, and the binary must have 12 digits to convert the decimal to obtain at least 4032 sets of absolute position codes (2 to the power of 12 = 4096). In the foregoing embodiment, a total of 12 optical couplers of 6 optical couplers are respectively disposed on the first encoder wheel 31 and the second encoder wheel 32, so that a set of 12-bit address codes can be read at one time.

The data of the foregoing embodiment can be changed according to requirements. For example, the number of teeth of the first encoder wheel 31 is reduced to 32 teeth, and the number of teeth of the second encoder wheel 32 is reduced to 31 teeth, so that 332 addresses can be obtained by 32X31. 2500mm divided by 992 addresses ≒ 2.51mm, the interval between two adjacent addresses is only a very small 2.51mm. In order to be able to write 992 sets of address codes, it is necessary to set up a binary reading device that can generate more than the number of addresses. The binary only needs 10 digits to convert the decimal to obtain at least 992 sets of absolute position codes (2 of 10) The power = 1024), so the first encoder wheel 31 and the second encoder wheel 32 only need to set 5 optical couplers for a total of 10 sets of optical couplers, that is, one set of 10-bit addresses can be read at once. coding.

In summary, the present invention provides an absolute encoding device capable of instantly reading the correct position by the above configuration, and can read the absolute position encoding of the exact position of the device when the device is stopped.

The embodiments described above are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement them according to the scope of the patent. Any changes or modifications made in accordance with the spirit of this creation and the contents of the manual shall be covered by this creation patent.

2‧‧‧Absolute coding device

21‧‧‧Base

211‧‧‧ cover

216‧‧‧ screws

31‧‧‧First code wheel

311‧‧‧Axle

312‧‧‧ first coding ring

3120‧‧‧Closed hole

3121‧‧‧ opening position

313‧‧‧ teeth

32‧‧‧Second code wheel

321‧‧‧ axle

322‧‧‧Second code ring

3220‧‧‧Closed hole

3221‧‧‧ opening position

323‧‧‧ teeth

421A‧‧‧First illuminator

421B‧‧‧second illuminator

52‧‧‧lower visor

522‧‧‧ blocks

101011‧‧‧Code

001010‧‧‧Code

Claims (9)

An absolute coding device includes a base, and the base is pivotally disposed with a first encoder wheel and a second encoder wheel. The first encoder wheel is provided with a first code ring, and the second code wheel is provided with a first encoder ring. a second encoder ring; a light shutter and a lower shutter are respectively disposed on two sides of the first encoder wheel and the second encoder wheel, wherein the lower shutter is provided with a plurality of first illuminators and a plurality of a second illuminator, the upper shutter is provided with a plurality of first receivers and a plurality of second receivers, the plurality of first illuminators and the plurality of first receivers corresponding to the first coding loop, the number The second illuminator and the plurality of second illuminators respectively correspond to the second coding ring, and the plurality of first illuminators and the plurality of second multiplexers can simultaneously read the first coding ring and the second coding ring The upper code forms a string of absolute codes, and the string of absolute codes is sent by an electrical connector provided by the upper shutter. The absolute coding device of claim 1, wherein the first coding ring and the second coding ring form a binary code with the aperture bit and the closed hole bit. The absolute encoding device of claim 2, wherein the first encoder wheel and the second encoder wheel are provided with intermeshing teeth on the outer circumference. The absolute encoding device of claim 3, wherein the number of teeth of the first encoder wheel and the number of teeth of the second encoder wheel are prime numbers. The absolute encoding device of claim 4, wherein a first visor is disposed between the first encoder wheel, the second encoder wheel and the lower shutter, and the lower visor is provided with a plurality of first illuminators. a first lower channel, and a plurality of second lower channels corresponding to the plurality of second illuminators; an upper visor disposed between the first encoder wheel, the second encoder wheel and the upper shutter, the upper visor There are a number of first upper channels corresponding to a plurality of first photoreceivers and a plurality of second upper channels corresponding to a plurality of second photoreceivers. The absolute encoding device of claim 4, wherein the lower shutter and the upper shutter have a copper pillar Electrical connection. The absolute encoding device of any one of claims 4 to 6, wherein the lower shutter is provided with at least four first illuminators and at least four second illuminators, and the upper shutter is provided with at least four first The photoreceiver and at least four second photoreceivers. The absolute coding device of claim 7, wherein the lower shutter is provided with six first illuminators and six second illuminators, and the upper shutter is provided with six first receivers and six second receivers. Device. The absolute encoding device of claim 8, wherein the number of teeth of the first encoder wheel is 64 teeth, and the number of teeth of the second encoder wheel is 63 teeth.