CN214066120U

CN214066120U - Absolute value encoder and electronic device

Info

Publication number: CN214066120U
Application number: CN202021307645.7U
Authority: CN
Inventors: 康德会
Original assignee: Weton Electronics Co ltd
Current assignee: Weton Electronics Co ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-08-27
Anticipated expiration: 2030-07-06

Abstract

The utility model discloses an absolute value encoder and electronic equipment. Wherein the absolute value encoder includes: a light emitting assembly; the coded disc is arranged in the light emitting direction of the light emitting component, and a code channel is arranged on the coded disc and provided with scribed lines; the photocell is used for receiving the light and dark stripes formed by the light beams through the code channel and generating induction current corresponding to the light and dark stripes; the load is electrically connected with the photocell, receives the induced current and converts the induced current into a voltage signal; the comparator is electrically connected with the load, receives the voltage signal and converts the voltage signal into a digital signal; and the processor is electrically connected with the comparator and used for receiving the digital signal and determining the current position of the code disc according to the digital signal. The technical scheme of the utility model can realize absolute value encoder's miniaturization.

Description

Absolute value encoder and electronic device

Technical Field

The utility model relates to an encoder application, in particular to absolute value encoder and electronic equipment.

Background

The working schemes of the prior projection type absolute value encoder mainly comprise the following four working schemes: the coded disc adopts binary coding, the current position value is read through a photocell, and the position value is converted into a digital quantity through a comparator, so that the current angle value is determined, and the higher the binary digit is, the higher the resolution of the encoder is; secondly, the code disc is coded by Gray codes, the current position value is read by a photocell, and the position value is converted into a digital quantity by a comparator, so that the current angle value is determined, and the higher the Gray code number is, the higher the resolution of the coder is; the coded disc adopts sine and cosine coding, the current position value is read through a photocell, analog quantity is directly output by a filter processing circuit, finally, signal processing is carried out by a host computer and the current angle value is determined, and the higher the code disc incremental code track line number is, the higher the encoder resolution ratio is; and (IV) the code disc is coded by using a cursor, the current position value is read by a photocell, the signal processing is carried out by an ADC (analog to digital converter), the current angle value is determined by a cursor calculation method, an absolute value is output by accumulating incremental signals after the operation, and the higher the number of the cursor is, the higher the resolution of the encoder is.

However, the above four schemes all have certain defects, in the first scheme, when the critical value of the binary minimum value and the critical value of the binary maximum value is read, the situation of misreading occurs, and meanwhile, as the binary digit number is higher, the size of the encoder is larger, the small size and the high digit number cannot be achieved; in the second scheme, the higher the Gray code number is, the larger the size of the encoder is, and the small size and high digit cannot be realized; in the third scheme, the sine and cosine encoder collects and outputs analog quantity, so that the anti-pollution performance is very low, the requirement on the IP (Ingress Protection) grade of the encoder is very high, and the size and the number of bits cannot be small. In the fourth scheme, the vernier coding calculates the current absolute value through analog quantity, so that the anti-pollution performance is low, the requirement on the IP grade of a coder is high, and the cost is high; the working scheme of the existing absolute value encoder can increase the volume of a code wheel when improving the resolution ratio, and is not beneficial to realizing the miniaturization of the existing absolute value encoder.

The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an absolute value encoder and electronic equipment aims at effectively reducing the volume of absolute value encoder, realizes the miniaturization of absolute value encoder.

To achieve the above object, the present invention provides an absolute value encoder, including: a light emitting assembly; the coded disc is arranged in the light emitting direction of the light emitting component, a code channel is arranged on the coded disc, and scribed lines are arranged on the code channel; the photocell is used for receiving the light and dark stripes formed by the light beams penetrating through the code channel and generating induction current corresponding to the light and dark stripes; the load is electrically connected with the photocell, receives the induction current and converts the induction current into a voltage signal; the comparator is electrically connected with the load, receives the voltage signal and converts the voltage signal into a digital signal; and the processor is electrically connected with the comparator and used for receiving the digital signal and determining the current position of the code disc according to the digital signal.

Optionally, a hollow circle is arranged in the middle of the code wheel, and the code channels are distributed around the hollow circle in concentric circles.

Optionally, the code channels include a first code channel, a second code channel, a third code channel, and a fourth code channel, and the first code channel, the second code channel, the third code channel, and the fourth code channel are sequentially disposed between the circumference of the hollow circle and the circumference of the code wheel.

Optionally, the first code channel and the fourth code channel have the same number of scribed lines, and the second code channel and the third code channel have the same number of scribed lines.

Optionally, a line segment which connects any two points on the circumference of the code wheel and passes through the center of the hollow circle is defined as the diameter of the code wheel, the directions of the center of the circle towards the two ends of the diameter are defined as the outer directions, the directions of the two ends of the diameter towards the center of the circle are the inner directions, and the two corresponding scribed lines in the inner and outer directions of the first code channel and the fourth code channel are on the same diameter; and the two scribed lines corresponding to the second code channel and the third code channel in the inner and outer directions are on the same diameter.

Optionally, the absolute value encoder further includes a rotating shaft penetrating through the hollow circle, the code wheel is fixed to the rotating shaft, and the rotating shaft rotates to drive the code wheel to rotate.

Optionally, a light-blocking material covers the surface of the code disc, which is not provided with the code channel between the circumference of the hollow circle and the circumference of the code disc.

Optionally, the light-emitting component is located on one side of the code wheel where the code channel is located, and the photocell is located on one side away from the code channel; and a connecting line between the light-emitting component and the photocell is vertical to the surface of the code wheel provided with the code channel.

Optionally, the code wheel is made of a light-transmitting material.

The utility model also provides an electronic equipment, electronic equipment includes the absolute value encoder, the absolute value encoder includes: a light emitting assembly; the coded disc is arranged in the light emitting direction of the light emitting component, and a code channel is arranged on the coded disc; the photocell is used for receiving the light and dark stripes formed by the light beams penetrating through the code channel and generating induction current corresponding to the light and dark stripes; the load is electrically connected with the photocell, receives the induction current and converts the induction current into a voltage signal; the comparator is electrically connected with the load, receives the voltage signal and converts the voltage signal into a digital signal; and the processor is electrically connected with the comparator and used for receiving the digital signal and determining the current position of the code disc according to the digital signal.

The technical scheme of the utility model, through set up a plurality of code channels on the code wheel, every code channel comprises the groove of a certain amount, and the quantity of groove can be according to positioning accuracy free adjustment, through multistage linear shift register generation cycle sequence, and divide into multiunit absolute value data with the cycle sequence according to certain interval, multiunit absolute value data can encode to same groove, and absolute value data is more under the certain condition of groove number, and positioning accuracy is higher, and under the certain condition of precision, the utility model provides a required groove number of absolute value encoder still less, the code wheel that the surface was equipped with the groove also can be littleer, is favorable to realizing absolute value encoder's miniaturization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of the internal connection relationship of an embodiment of an absolute value encoder according to the present invention;

FIG. 2 is a schematic diagram of a view structure of an absolute value encoder;

FIG. 3 is an enlarged view of a portion a of FIG. 2;

FIG. 4 is a schematic flowchart illustrating steps of an embodiment of a bit reading method of an absolute value encoder according to the present invention;

FIG. 5 is a schematic diagram of a waveform of an embodiment of a bit reading method of an absolute value encoder according to the present invention;

FIG. 6 is a flowchart illustrating an embodiment of step S20 in FIG. 4;

fig. 7 is a flowchart illustrating an embodiment of step S30 in fig. 4.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Absolute value encoder	60	Processor with a memory having a plurality of memory cells
10	Light emitting assembly	21	First code channel
				20	Code wheel	22	Second code channel
30	Photovoltaic cell	23	Third code channel
				40	Load(s)	24	The fourth code channel
50	Comparator with a comparator circuit	25	Hollow round

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

The utility model provides an absolute value encoder 100.

Referring to fig. 1 to fig. 3, in an embodiment of the absolute value encoder 100 of the present invention, the absolute value encoder 100 includes: a light emitting assembly 10; the coded disc 20 is arranged in the light emitting direction of the light emitting component 10, and a code channel is arranged on the coded disc 20; a photocell 30 for receiving the light and dark stripes formed by the light beam passing through the code channel and generating an induced current corresponding to the light and dark stripes; the load 40 is electrically connected with the photocell 30, receives the induced current and converts the induced current into a voltage signal; the comparator 50 is electrically connected with the load 40, receives the voltage signal and converts the voltage signal into a digital signal; and the processor 60, the processor 60 is electrically connected with the comparator 50, and the processor 60 is used for receiving the digital signal and determining the current position of the code wheel 20 according to the digital signal.

Specifically, the light emitting element 10 in this embodiment is an electronic element capable of emitting a light beam, the light emitting element 10 perpendicularly irradiates a light beam to a surface of the annular code wheel 20 on which a code track is disposed, the code track is composed of spaced apart scribe lines, the light beam irradiates the scribe lines within a certain range, as shown in fig. 2 and 3, fig. 3 is an enlarged schematic view of a portion a in fig. 2, the light beam irradiates the range including a certain number of scribe lines, it is to be noted that the code wheel 20 is made of a light-transmitting material, such as glass, the light beam can penetrate through the code wheel to form light and dark stripes on the surface of the photocell 30, and according to the working principle of the photocell 30, when the light and dark stripes are formed on the surface of the photocell 30, the photocell will generate an induced current.

It can be understood that, a code track composed of scribed lines according to a specific coding mode is disposed on the code wheel 20, different light and dark light stripes are formed on the photocell 30 while the code wheel 20 rotates, the photocell 30 generates different induced currents according to the different formed light stripes, the load 40 is electrically connected to the photocell 30, the induced currents can be transmitted from the photocell 30 to the load 40, according to the working principle of the load 40, the load 40 can convert the induced currents into corresponding voltages, the load 40 transmits the converted voltages to the comparator 50 electrically connected to the load 40 in the form of voltage signals, according to the working principle of the comparator 50, the comparator 50 can convert the voltage signals into digital signals that can be processed by the processor 60 and transmit the digital signals to the processor 60 electrically connected to the comparator 50, after the processor 60 receives the digital signals, the digital signal is converted to a specific number to indicate the current position of the code wheel 20 after rotation.

In one embodiment of the invention, the voltage signals include absolute value analog voltage signals and delta analog voltage signals.

In an embodiment of the invention, the processor includes an analog-to-digital converter, the incremental analog voltage signal is divided into two paths, one path is converted into a digital quantity by the comparator and input into the processor, and the other path is directly input into the analog-to-digital converter, and the incremental analog voltage signal input into the analog-to-digital converter can be subdivided by a software subdivision algorithm to realize the required resolution.

In an embodiment of the present invention, a hollow circle 25 is disposed in the middle of the code wheel 20, and the code tracks are distributed concentrically around the hollow circle 25.

Specifically, as shown in fig. 2, the code wheel 20 in the present embodiment is annular, and a through hollow circle 25 is disposed in the middle of the code wheel 20, and it can be known from the application scene and the function of the code wheel 20 that the code wheel 20 is used for recording the rotation angle of the rotation shaft and the current position after rotation, so that the code wheel 20 needs to be fixed on a rotation shaft, and the hollow circle 25 serves to enable the code wheel to be sleeved on the rotation shaft, and it can be understood that the size of the hollow circle 25 is related to the rotation shaft sleeved on the code wheel 20, and the code wheel 20 needs to be firmly fixed on the rotation shaft through the hollow circle 25, so that when the rotation shaft rotates, the code wheel 20 can keep absolute synchronization with the rotation shaft, and the code wheel 20 can accurately record the rotation angle of the rotation shaft.

It should be noted that, one side of the code wheel 20 is provided with code channels, and the code channels are distributed around the hollow circle 25 in a concentric circle.

In an embodiment of the present invention, the code channel includes a first code channel 21, a second code channel 22, a third code channel 23 and a fourth code channel 24, and the first code channel 21, the second code channel 22, the third code channel 23 and the fourth code channel 24 are sequentially disposed between the circumference of the hollow circle 25 and the circumference of the code wheel 20.

Specifically, as shown in fig. 3, in the present embodiment, four code channels are disposed on the code wheel 20, a first code channel 21, a second code channel 22, a third code channel 23, and a fourth code channel 24 are sequentially disposed in a direction from the circumference of the code wheel 20 to the hollow circle 25, the number of scribed lines in the second code channel 22 and the third code channel 23 is different according to different positioning accuracies, the number of scribed lines in the second code channel 22 and the third code channel 23 in the present embodiment is equal to 512, and the number of the first code channel 21 and the number of the fourth code channel 24 are equal to 512.

In an embodiment of the present invention, the first track 21 and the fourth track 24 have the same number of scribed lines, and the second track 22 and the third track 23 have the same number of scribed lines.

It should be noted that the second track 22 and the third track 23, and the first track 21 and the fourth track 24 have the same number of scribe lines, and the positions of the scribe lines correspond to each other, so as to ensure that when the light beam irradiates the tracks on the code wheel 20, light stripes with uniform and alternating brightness and darkness are formed on the photocell. When the photoelectric cell analyzes the light stripe, the corresponding induced current can be accurately generated.

In a preferred embodiment, the first code channel and the fourth code channel are provided with the same number of scribed lines based on M-sequence coding, and the phase difference between the first code channel and the fourth code channel is 180 degrees. If a code channel based on M-sequence coding is used, a scrambling code may occur between two adjacent sets of absolute values, for example, it is not possible to determine which reticle to select.

In a further preferred embodiment, the first code channel and the fourth code channel are encoded by using an M-sequence of 9 bits 512 lines.

In a preferred embodiment, the second code track is 90 degrees out of phase with the third code track.

In an embodiment of the present invention, any two points on the circumference of the code wheel 20 are defined and connected, and a line segment passing through the center of the hollow circle 25 is the diameter of the code wheel 20, the direction of the center of the circle towards the two ends of the diameter is defined as an outer direction, and the direction of the two ends of the diameter towards the center of the circle is defined as an inner direction; the two scribed lines corresponding to the first code channel 21 and the fourth code channel 24 in the inner and outer directions are on the same diameter; the second track 22 and the third track 23 have the same diameter with two corresponding scribed lines in the inside and outside directions.

Specifically, as shown in fig. 3, the present embodiment gives a specific distribution of the scribed lines constituting the code track in the present embodiment by defining two directions, i.e., an inner direction and an outer direction, and one length, i.e., the diameter of the code wheel 20, and as shown in fig. 3, it is understood that, as can be seen from the definition of the diameter of the circle, a line segment passing through the center of the hollow circle 25 (i.e., the center of the code wheel 20) is the diameter of the code wheel 20, the directions from the center toward the two ends of the diameter are the outer directions, and the directions opposite to the outer directions are the inner directions, i.e., the directions from one point on the circumference of the code wheel 20 toward the center.

In both the inward direction and the outward direction, the two scribed lines at the corresponding positions in the first code track 21 and the fourth code track 24 are in the same inward direction or the same outward direction, and the two scribed lines at the corresponding positions in the second code track 22 and the third code track 23 are in the same inward direction or the same outward direction. I.e. the two scribed lines at corresponding positions are on the same diameter.

In an embodiment of the present invention, the absolute encoder 100 further includes a rotating shaft passing through the hollow circle 25, the code wheel 20 is fixed to the rotating shaft, and the rotating shaft rotates to drive the code wheel 20 to rotate.

Specifically, according to the application scenario and the action of the code wheel 20, the code wheel 20 is used for recording the rotation angle of the rotation shaft and the current position after rotation, so the code wheel 20 needs to be fixed on one rotation shaft, the hollow circle 25 serves to enable the code wheel to be sleeved on the rotation shaft, it can be understood that the size of the hollow circle 25 is related to the rotation shaft sleeved on the code wheel 20, and the code wheel 20 needs to be firmly fixed on the rotation shaft through the hollow circle 25, so that when the rotation shaft rotates, the code wheel 20 can be kept in absolute synchronization with the rotation shaft, and the code wheel 20 can accurately record the rotation angle of the rotation shaft.

In an embodiment of the present invention, the light emitting component 10 is located at one side of the code wheel 20 where the code channel is located, and the photocell 30 is located at one side away from the code channel; the line between the light emitting element 10 and the photocell 30 is perpendicular to the face of the code wheel 20 on which the code tracks are provided.

The code wheel 20 is made of a light-transmitting material.

It should be noted that the surface of the code wheel 20, which is not provided with a code track between the circumference of the hollow circle 25 and the circumference of the code wheel 20, is covered with a light-blocking material.

Specifically, as can be seen from fig. 2, in the present embodiment, one side of the code wheel 20 is provided with a code track, and the area without the code track is covered with a light-blocking material, so as to ensure that the light and dark stripes formed on the surface of the photocell 30 by the light beam transmitted through the code wheel 20 are only related to the scribed lines constituting the code track, and it is also more convenient to encode the absolute value data into the code track, the light-emitting component 10 is located on the side of the code wheel 20 where the code track is provided, and the light-emitting component 10 projects the light beam towards the code wheel 20 in the direction perpendicular to the surface where the code track is located, it can be understood that if the light beam projected by the light-emitting component 10 is not perpendicular to the surface where the code track is located, the stripes formed on the surface of the photocell 30 will not be uniformly alternated, which is not favorable for reading the absolute value data encoded into the code track. It will be appreciated that the photocell 30 is located on the side facing away from the code wheel 20 on which the code tracks are located, and that the surface of the photocell 30 is able to receive the resulting light and dark fringes in its entirety.

The utility model discloses still provide a bit reading method of absolute value encoder 100, please refer to fig. 4, in the utility model discloses in the bit reading method embodiment of absolute value encoder 100, the bit reading method of absolute value encoder 100 includes following step:

step S10, when a coded disc reading request is received, determining a target position corresponding to the coded disc reading request and a positioning area where the target position is located;

the code disc reading request in this embodiment is a request generated by the system when a user manually or automatically obtains the rotation angle of the rotating shaft by a device, and the code disc reading request is an initial action executed by a reading program and is also an initial mark of the reading method in this embodiment. In combination with the structure of the absolute value encoder 100 provided by the present invention, the light emitting module 10 emits a light beam to the code wheel 20, the area where the light beam is projected on the code wheel 20 is the positioning area in the present application, and the portion a in fig. 2 is the positioning area in the present embodiment, since the projection direction of the light emitting module 10 is fixed, the code wheel 20 rotates along with the rotation axis, the positioning area moves relative to the code wheel 20, but is fixed relative to the light emitting module 10, and a certain position of the positioning area is designed as a positioning position (i.e. a target position in the present embodiment), for example, a range of 2 cm to 3 cm on the ruler is used as the positioning area, and a point in a range of 2 cm to 3 cm such as 2.1 cm or 2.2 cm is used as the positioning position.

Step S20, reading the target code channel in the positioning area to obtain a simulated induction current;

as shown in fig. 5, the waveform diagrams corresponding to the second code track 22 and the third code track 23 can be obtained by reading the light and dark stripes projected on the surface of the photocell 30 (the waveform a in fig. 5 represents the waveform corresponding to the second code track 22, the waveform B represents the waveform corresponding to the third code track 23), when the waveform corresponding to the target position is in the second quadrant of the waveform a and in the fourth quadrant of the waveform B, the photocell 30 will read the light and dark stripes projected on the photocell 30 by the reticle having the first code track 21 in the positioning area, in this case, the first code track 21 is the target code track in this embodiment, when the waveform corresponding to the target position is in the three-four quadrant of the waveform a and the two-three quadrant of the waveform B, the photocell 30 will read the light and dark stripes projected on the photocell 30 by the reticle having the fourth code track 24 in the positioning area, in this case, the fourth code track 24 is the target code track in this embodiment. By adopting the mode, the first code channel or the fourth code channel is read alternately, and the problem that which reticle can not be selected is solved.

Step S30, determining a value of the target position according to the simulated induction current.

Specifically, the photocell 30 generates an analog induction current according to light and dark stripes formed on the surface of the photocell, then the bit reading program transmits the analog induction current to the load 40 electrically connected with the photocell, the load 40 converts the analog induction current into a voltage signal after receiving the analog induction current, then the bit reading program transmits the voltage signal to the comparator 50 electrically connected with the load 40, the comparator 50 further converts the voltage signal into a digital signal which can be read by equipment after receiving the voltage signal, finally, the bit reading program transmits the digital signal to the processor 60, and the processor 60 further processes the digital signal after receiving the digital signal to obtain a specific value, wherein the unit of the value is the degree of an angle. Indicating the angular value at which the code wheel 20 is rotated to the current position.

Referring to fig. 6, in an embodiment of the present invention, the step S20 is a detailed step, which includes:

step S21, obtaining the first code channel 21, the second code channel 22, the third code channel 23, and the fourth code channel 24 in the positioning area, and reading the second code channel 22 and the third code channel 23 to obtain a first reading result.

Step S22, determining to read the first code channel 21 or the fourth code channel 24 according to the first reading result, and taking the result of reading the first code channel 21 or the fourth code channel 24 as a second reading result.

Step S23, determining a simulated induced current according to the first reading result and the second reading result.

As can be seen, by reading the light and dark stripes projected on the surface of the photocell 30 by the reticle of the second code channel 22 and the third code channel 23 in the positioning area, waveform diagrams corresponding to the second code channel 22 and the third code channel 23 are obtained (in fig. 5, the waveform a represents the waveform corresponding to the second code channel 22, and the waveform B represents the waveform corresponding to the third code channel 23), when the waveform corresponding to the target position is in the second quadrant of the waveform a and in the fourth quadrant of the waveform B, the photocell 30 will read the light and dark stripes projected on the photocell 30 by the reticle of the first code channel 21 in the positioning area, and the read result is the first read result in this embodiment; when the waveform corresponding to the target position is in the three-four quadrant of the waveform a and the two-three quadrant of the waveform B, the photocell 30 reads the light and dark stripes projected by the reticle of the fourth code track 24 in the positioning region on the photocell 30, the reading result is the second reading result in the present embodiment, and the first reading result and the second reading result respectively correspond to different analog induced currents.

Accordingly, referring to fig. 7, the step of step S30 refinement includes:

in step S31, the analog induced current is transmitted to the preset load 40, so that the preset load 40 converts the analog induced current into a voltage signal.

In step S32, the voltage signal is transmitted to the preset comparator 50, so that the preset comparator 50 converts the voltage signal into a digital signal.

Step S33, sending the digital signal to the preset processor 60, so that the preset processor converts the digital signal into a value of the target position.

Specifically, according to the structure of the absolute value encoder 100 proposed in this embodiment, the light emitting element 10 emits a light beam to form a positioning area on the code wheel 20, the photocell 30 receives light and dark stripes formed by the scribed lines in the positioning area, the photocell 30 generates an analog induced current according to the light and dark stripes received by the surface of the photocell 30, then the bit reading program transmits the analog induced current to the load 40 electrically connected to the photocell, the load 40 converts the analog induced current into a voltage signal after receiving the analog induced current, then the bit reading program transmits the voltage signal to the comparator 50 electrically connected to the load 40, the comparator 50 further converts the voltage signal into a digital signal which can be read by the device after receiving the voltage signal, finally, the bit reading program transmits the digital signal to the processor 60, after receiving the digital signal, the digital signal is further processed to derive a specific value (i.e. the value of the target position in this embodiment) in degrees of angle. Indicating the angular value at which the code wheel 20 is rotated to the current position.

Through reading the target code track in the location area in this embodiment, obtain the induced-current of simulation to through a series of conversions, obtain a definite angle value, because the reading method in the embodiment supports and encodes multiunit absolute value data to same groove, absolute value data is more under the certain circumstances of groove number, and positioning accuracy is higher, and under the certain circumstances of precision, the utility model provides a required groove of absolute value encoder still less, the code wheel that the surface was equipped with the groove also can be littleer, is favorable to realizing the miniaturization of absolute value encoder.

The utility model also provides an electronic equipment, electronic equipment include absolute value encoder 100 as before, and the concrete structure of this absolute value encoder 100 refers to aforementioned embodiment. Since all technical solutions of all the foregoing embodiments are adopted, at least all beneficial effects brought by the technical solutions of the foregoing embodiments are achieved, and no further description is given here.

It should be noted that the electronic device is generally a mobile phone, a watch, an earphone, a bracelet, and the like, and the absolute value encoder 100 is generally installed in a housing of the electronic device, so that the electronic device can implement more functions.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An absolute value encoder, comprising:

a light emitting assembly;

the coded disc is arranged in the light emitting direction of the light emitting component, a code channel is arranged on the coded disc, and scribed lines are arranged on the code channel;

the photocell is used for receiving light and dark stripes formed by the light beams emitted by the light-emitting component through the code channel and generating induction current corresponding to the light and dark stripes;

the load is electrically connected with the photocell, receives the induction current and converts the induction current into a voltage signal;

the comparator is electrically connected with the load, receives the voltage signal and converts the voltage signal into a digital signal;

and the processor is electrically connected with the comparator and used for receiving the digital signal and determining the current position of the code disc according to the digital signal.

2. The absolute value encoder of claim 1, wherein the code wheel has a hollow circle in the middle, and the code tracks are arranged concentrically around the hollow circle.

3. The absolute value encoder of claim 2, wherein the code channels include a first code channel, a second code channel, a third code channel, and a fourth code channel, and the first code channel, the second code channel, the third code channel, and the fourth code channel are sequentially provided between a circumference of the hollow circle and a circumference of the code wheel.

4. The absolute value encoder of claim 3, wherein the first code track and the fourth code track have a same number of lines, and the second code track and the third code track have a same number of lines.

5. The absolute value encoder according to any one of claims 3 or 4, wherein a line segment connecting any two points on the circumference of the code wheel and passing through the center of the hollow circle is defined as a diameter of the code wheel, a direction of the center of the circle toward both ends of the diameter is defined as an outer direction, and a direction of both ends of the diameter toward the center of the circle is defined as an inner direction;

the two scribed lines corresponding to the first code channel and the fourth code channel in the inner and outer directions are on the same diameter;

and the two scribed lines corresponding to the second code channel and the third code channel in the inner and outer directions are on the same diameter.

6. The absolute value encoder of claim 2 further comprising a rotating shaft extending through the hollow circle, the code wheel being fixed to the rotating shaft, the rotating shaft rotating to rotate the code wheel.

7. The absolute value encoder of claim 2, wherein a surface of the code wheel between a circumference of the hollow circle and a circumference of the code wheel where no code track is provided is covered with a light-blocking material.

8. The absolute value encoder of claim 1, wherein the light emitting element is located on a side of the code wheel on which the code track is located, and the photocell is located on a side facing away from the code track;

and a connecting line between the light-emitting component and the photocell is vertical to the surface of the code wheel provided with the code channel.

9. The absolute value encoder of claim 1, wherein the code wheel is constructed of a light transmissive material.

10. An electronic device, characterized in that it comprises an absolute value encoder according to any of claims 1 to 9.