CN112985472B - Contact type ultra-smooth encoder - Google Patents
Contact type ultra-smooth encoder Download PDFInfo
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- CN112985472B CN112985472B CN202110559771.4A CN202110559771A CN112985472B CN 112985472 B CN112985472 B CN 112985472B CN 202110559771 A CN202110559771 A CN 202110559771A CN 112985472 B CN112985472 B CN 112985472B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
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Abstract
The invention provides a contact type ultra-smooth encoder which comprises a code disc assembly and a reading assembly, wherein the code disc assembly comprises an ultra-smooth code disc, the ultra-smooth code disc is provided with at least one code channel, and the code channel is provided with an atomic-level flat surface; the reading assembly comprises at least one rotating disc, the rotating disc is opposite to the ultra-sliding coded disc, at least one contact component is arranged on the rotating disc and slides along the coded code channel, the contact component comprises at least one ultra-sliding sheet, and the ultra-sliding sheet is in ultra-sliding contact with the atomic-level flat surface and outputs a coded signal. The contact type ultra-smooth encoder provided by the invention can directly output a certain code system digital code through the design of the ultra-smooth code disc, the size of the ultra-smooth sheet is generally small, and a plurality of layers of encoding code channels can be arranged in a small-scale ultra-smooth code disc, so that the encoder with higher precision and high resolution is realized.
Description
Technical Field
The invention belongs to the technical field of encoders, and particularly relates to a contact type ultra-smooth encoder.
Background
A rotation angle measuring device (also called an encoder) is a device that measures an angle and a rotation speed, and is used in many fields such as for measuring a motor speed or angle control, and the like. According to the difference of contact mode, the encoder can be divided into contact encoder and non-contact encoder, and non-contact encoder can be divided into optical encoder, magnetic encoder or capacitanc encoder etc. according to theory of operation, but above-mentioned multiple non-contact encoder exists the precision and is lower, and receives various problems such as interference such as electromagnetic interference or strong light easily, and the reliability is relatively poor.
The contact encoder is composed of a code disc and an electric brush, wherein the electric brush is a movable contact structure, the code disc is rotated under the action of external force, when the electric brush is contacted with the code disc, the conduction of current can be realized, and a certain digital code output of a certain code system is generated.
It is therefore a technical challenge in the art how to manufacture an encoder having high reliability and long life.
Disclosure of Invention
The invention aims to provide a contact type ultra-smooth encoder, which aims to solve the technical problems of low reliability or short service life of the contact type encoder in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: provided is a contact type ultra-smooth encoder, comprising: the code wheel assembly comprises an ultra-smooth code wheel, the ultra-smooth code wheel is provided with at least one code channel, and the code channel is provided with an atomic-level flat surface;
the reading assembly comprises at least one rotating disc, the rotating disc is opposite to the ultra-sliding coded disc, at least one contact part is arranged on the rotating disc, the contact part slides along the code channel, the contact part comprises at least one ultra-sliding sheet, and the ultra-sliding sheet is in ultra-sliding contact with the atomic-level flat surface and outputs a code signal.
Further, the code channel is provided with a conductive area and an insulating area, the contact part is in contact conduction with the conductive area, and the contact part is in contact conduction with the insulating area and is not in conduction.
Further, an input circuit and a receiving circuit are included, the input circuit being electrically connected to the contact member, the receiving circuit being electrically connected to the conductive area; alternatively, the input circuit is electrically connected to the conductive region, and the receiving circuit is electrically connected to the contact member.
Furthermore, the surfaces of two opposite sides of the ultra-smooth coded disc, which are perpendicular to the rotation center, are provided with the code channels, the number of the rotating discs is two, the two rotating discs are respectively positioned on two opposite sides of the ultra-smooth coded disc, and the contact parts on the two sides are respectively contacted with the code channels on the two sides.
The ultra-smooth code disc further comprises an additional circuit, two ends of the additional circuit are electrically connected with the contact parts positioned on two sides of the ultra-smooth code disc respectively, and the two contact parts on the two sides are in contact conduction through the conductive area and are in contact disconnection through the insulating area.
Furthermore, the code channel is provided with a power generation area and a non-power generation area, the contact component and the power generation area form ultra-smooth contact and Schottky contact and emit current, and the contact component and the non-power generation area are only in ultra-smooth contact.
Further, the power generation region is made of a semiconductor material or a metal material with an atomic-scale flat surface, and the super-slip sheet is made of a semiconductor material with a single-crystal two-dimensional interface.
Furthermore, the ultra-sliding piece comprises an induction circuit, and the induction circuit is electrically connected with two side faces of the ultra-sliding piece respectively.
Furthermore, the ultra-smooth code disc also comprises a monitoring code channel, and the monitoring code channel is always in contact conduction with the contact part.
Furthermore, one side of the same rotating disc is provided with at least two contact parts, the contact parts are respectively opposite to the coding code channel and the monitoring code channel, and the same coding code channel and the contact parts are used for one or more contact parts to slide.
The shell is arranged on the outer sides of the code wheel assembly and the reading assembly; the shell is fixedly connected with the coded disc assembly or the reading assembly, and a buffer layer is arranged between the shell and the coded disc assembly or the reading assembly.
Furthermore, the buffer layer is arranged on the shell, and the buffer layer is arranged on the shell and is used for buffering the reading assembly or the coded disc assembly.
Further, the adjustment limiting part comprises at least two first magnetic parts which are arranged oppositely, the first magnetic parts are respectively arranged on the inner side of the shell and the outer side of the reading assembly or the coded disc assembly, and the polarities of the two first magnetic parts are the same or opposite.
Furthermore, the contact component also comprises a fixed head and an elastic piece, and the fixed head is fixedly connected with the rotating disc through the elastic piece.
Furthermore, an arc-shaped surface is arranged on one side, facing the ultra-sliding coded disc, of the fixing head, and the ultra-sliding disc is fixed on one side, closest to the ultra-sliding coded disc, of the arc-shaped surface.
Furthermore, second magnetic pieces are arranged in the fixing head and the ultra-smooth coded disc, and the fixing head is magnetically adsorbed on the ultra-smooth coded disc.
The contact type ultra-smooth encoder provided by the invention has the beneficial effects that:
1. the contact type encoder has the advantages of small size, high precision, high resolution and high reliability, the size of the super-slip sheet is generally small, namely the size of the whole contact part can be set to be a micron-sized or millimeter-sized, a plurality of layers of encoding code channels can be arranged in the super-slip code disc with a small size, and the encoder with higher precision and high resolution is realized.
2. The ultra-sliding piece and the atomically smooth coding code channel are matched, so that when the rotating disc rotates relative to the ultra-sliding code disc, the contact part can be in ultra-sliding contact with the ultra-sliding code disc, signals are output, the ultra-low friction force abrasion-free sliding effect can be achieved, adhesion failure due to charge accumulation on the electrode can be avoided, the electrostatic attraction phenomenon can be avoided, and the ultra-long service life can be realized.
3. The code channels are respectively arranged on two sides of the ultra-smooth code disc, the contact parts on the two sides are connected with the ultra-smooth code disc, voltage is applied through an external circuit, conductive devices such as a conductive sliding ring and the like do not need to be additionally arranged, conduction can be achieved directly through the two contact parts, and the judgment of current can be more accurate. If the conductive area is rotated to the conductive area, communication can be achieved, and a conduction signal can be output; if the rotation reaches the insulation area, the communication cannot be realized, and the conduction signal cannot be realized; through the layout of the ultra-smooth code disc, signal output can be realized.
4. The buffer layer and the adjusting limiting part are matched to realize axial positioning between the coded disc assembly and the reading assembly, so that the coded disc assembly and the reading assembly can be limited in position, the coded disc assembly and the reading assembly are prevented from being separated, the jolt and heave working condition can be adapted, and extra friction cannot be generated.
5. The second magnetic pieces are arranged in the fixed head and the ultra-slip code disc, so that the fixed head can be guaranteed to be always in contact with the ultra-slip code disc, the elastic pieces adapt to the movement of the fixed head, and the accuracy of data is guaranteed by monitoring the monitoring states of the ultra-slip sheet and the code track in real time through monitoring the code track.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic cross-sectional structural diagram of a contact type ultra-smooth encoder provided in embodiments 1 and 3 of the present invention;
FIG. 2 is a first schematic circuit diagram of a contact type ultra-smooth encoder according to embodiment 1 of the present invention;
fig. 3 is a second schematic circuit diagram of a contact type ultra-smooth encoder according to embodiment 1 of the present invention;
FIG. 4 is a schematic cross-sectional view of a contact type ultra-smooth encoder according to embodiment 2 of the present invention;
FIG. 5 is a schematic circuit diagram of a contact type ultra-smooth encoder according to embodiment 2 of the present invention;
FIG. 6 is a schematic view of a contact member used in an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of an ultra-smooth code wheel used in the embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1-a code wheel assembly; 2-a reading component; 3-a shell; 4-a buffer layer; 5-adjusting a limiting part; 6-an additional circuit; 7-an external rotating shaft; 11-ultra-smooth code disc; 12-an input circuit; 111-code channel; 112-monitoring code channel; 1111-conductive region; 1112-an insulating region; 1113-power generation area; 1114-a non-power generation zone; 21-a rotating disc; 22-a contact member; 23-a receiving circuit; 221-a fixed head; 222-a resilient member; 223-superclip; 224-a second magnetic element.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Because the ultra-slip of a large scale cannot be realized for a long time, the phenomenon that the friction coefficient is in the order of thousandth or lower is often called as ultra-slip in documents for over ten years; the phenomenon that the initial friction and wear caused by the non-degree-of-concentricity contact are almost zero is called 'structural lubrication', and the 'ultra-lubricity' refers to the phenomenon that the friction and wear caused by the non-degree-of-concentricity contact are almost zero.
Example 1
Referring to fig. 1 to fig. 3, a contact type ultra-smooth encoder according to the present invention will now be described. The contact type ultra-smooth encoder comprises a coded disc assembly 1, a reading assembly 2 and a shell 3, wherein the coded disc assembly 1 is connected with an external fixed part, the reading assembly 2 is connected with an external rotating shaft 7, the shell 3 is covered on the outer sides of the coded disc assembly 1 and the reading assembly 2, the whole encoder is protected through the shell 3, and the shell 3 cannot rub against the coded disc assembly 1 and the reading assembly 2.
The shell 3 is fixedly connected with the coded disc assembly 1, a buffer layer 4 is padded between the shell 3 and the coded disc assembly 1, one side of the buffer layer 4 is fixedly connected with the shell 3, and the other side of the buffer layer 4 is fixedly connected with the coded disc assembly 1; the buffer layer 4 can support the code disc assembly 1, and the code disc assembly 1 and the reading assembly 2 are in contact fit, so that the positions of the code disc assembly 1 and the reading assembly 2 in the shell 3 can be relatively fixed, and the code disc assembly 1 is prevented from being separated when bumping.
Further, the device also comprises an adjusting limiting part 5, wherein the adjusting limiting part 5 is positioned between the shell 3 and the reading assembly 2 and can limit the position of the reading assembly 2, the acting force of the adjusting limiting part 5 on the shell 3 is opposite to the acting force of the buffer layer 4 on the shell 3, the effect of limiting the positions of the code disc assembly 1 and the reading assembly 2 together can be achieved, the bumping between the code disc assembly 1 and the reading assembly 2 can be balanced, and the contact part 22 and the ultra-smooth code disc 11 are prevented from being separated, so that the counting is influenced.
Preferably, the adjustment limiting member 5 includes at least two first magnetic members disposed oppositely, the first magnetic members are disposed inside the housing 3 and outside the reading assembly 2, and the polarities of the two first magnetic members are the same or opposite. The two first magnetic parts can generate repulsive force or attractive force, and cannot be in direct contact with each other or generate additional friction force.
Furthermore, the code wheel assembly 1 comprises an ultra-smooth code wheel 11, wherein the ultra-smooth code wheel 11 is provided with at least one code channel 111 and a monitoring code channel 112, the code channel 111 and the monitoring code channel 112 are a plurality of concentric circles, the centers of the concentric circles are concentric with the rotation center of the ultra-smooth code wheel 11, and the surface of the code channel 111 is an atomic-level flat surface.
The reading assembly 2 comprises at least one rotating disc 21, the rotating disc 21 has the same rotating center as that of the ultra-smooth code disc 11, wherein the rotating disc 21 can rotate relative to the ultra-smooth code disc 11 under the driving of the external rotating shaft 7. The rotating disc 21 is provided with at least one contact part 22, the upper side of the contact part 22 is fixed on the rotating disc 21, and the lower side of the contact part 22 is attached to the ultra-smooth coded disc 11; the contact part 22 can slide along the code track 111, the contact part 22 comprises at least one ultra-sliding piece 223, one side surface of the ultra-sliding piece 223, facing the ultra-sliding code disc 11, is an ultra-sliding surface, the ultra-sliding piece 223 is in ultra-sliding contact with the ultra-sliding code disc 11, and through the modes of external voltage application or self-power generation, a rotation signal can be output when the ultra-sliding piece 223 is in contact with the ultra-sliding code disc 11.
The contact type ultra-smooth encoder provided by the invention can directly output signals of a certain code system through the design of the ultra-smooth code disc 11. By adopting the matching of the ultra-sliding sheet 223 and the code channel 111 with an atomic-level flat surface, when the rotating disc 21 rotates relative to the ultra-sliding code disc 11, ultra-sliding contact can be realized, the effect of ultra-low friction force and abrasion-free sliding is achieved, adhesion failure caused by charge accumulation on an electrode can be avoided, the phenomenon of electrostatic attraction can be avoided, and the ultra-long service life can be realized.
The size of the ultra-sliding sheet 223 is generally small, the size of the whole contact part 22 can be in a micron or millimeter level, and a plurality of layers of coding code channels 111 can be arranged in the ultra-sliding code disc 11 with a small size, so that an absolute encoder or an incremental encoder with higher precision and high resolution is realized.
The super-slip surface is an atomically smooth two-dimensional material having a self-healing function, and the material of the super-slip sheet 223 is preferably a graphite sheet or other material having a super-slip surface, and is preferably a material having a super-slip property, such as graphite, single-layer/few-layer graphene, or the like, attached to the lower surface. The ultra-smooth code wheel 11 has a code channel region and a non-code channel region, wherein the code channel region is an atomic-level flat surface, and the non-code channel region may be an atomic-level flat surface or not, and is not limited specifically here.
Further, referring to fig. 6 and fig. 7 together, as an embodiment of the contact type ultra-smooth encoder provided by the present invention, the code channel 111 has a conductive region 1111 and an insulating region 1112, when a voltage is applied externally, the contact member 22 and the conductive region 1111 may be in contact conduction, the contact member 22 and the insulating region 1112 are in contact to realize non-conduction, at this time, the contact member 22 can output a code signal when the conductive region 1111 and the insulating region 1112 are in contact and rotate, and if the conductive region 1111 and the insulating region 1112 are rotated, the communication can be realized, and a conduction signal, such as "1" is output; if the substrate is rotated to the insulating region 1112, the connection cannot be realized, and a signal which cannot be conducted is output, for example, "0" is output; through the layout of the ultra-smooth code disc 11 and the arrangement of the plurality of code channels 111, the output of digital codes of a certain code system can be realized, the counting of the number of turns and the calculation of the rotation angle can be realized, and the power-down memory function can be realized.
In the contact type ultra-smooth encoder, the ultra-smooth sheet 223 can not only reduce the friction force between the contact part 22 and the code channel 111, but also can play a role of conducting electricity, so that the contact part 22 and the conductive region 1111 are conducted, and the current can be transmitted between the contact part 22 and the ultra-smooth code disc 11, thereby realizing the output of digital codes.
At present, a common graphite material is of a hexagonal crystal structure, a plurality of graphene layers are stacked on the structure, and graphene layers are not chemically bonded and are only bonded together by weak van der waals force, so that the common graphite material is extremely difficult to conduct electricity in the direction perpendicular to the graphene surface, namely the common graphite material has poor conductivity. The electric brush in the prior art directly adopts graphite materials as the conductive connecting piece, so the electric conductivity of the electric brush is larger, the connecting part has larger resistance, and larger external voltage is needed to meet the requirement of detecting current.
Adopt super gleitbretter 223 to realize electrically conductive connection, its thickness is generally thinner and the size is less, and super gleitbretter 223 can contact with conductive region 1111 super-sliding, and the electric conductivity of whole contact member 22 that its can be great is avoided the resistance too big, only needs less voltage both can form the electric current to be received by receiving circuit 23 and switch on the information.
The conductive region 1111 and the insulating region 1112 of the code channel 111 are arranged at intervals, and can correspond to a unique position through the design of the ultra-smooth code disc 11; the monitoring code channel 112 is all the conductive area 1111, that is, the contact component 22 can always contact the conductive area 1111 and output the digital code, when the output is interrupted, the measurement result may have an inaccurate condition, and an alarm may be sent or a correct count may be distinguished, thereby further enhancing the measurement accuracy.
Further, referring to fig. 2, only one side surface of the ultra-smooth code wheel 11 is provided with the code channel 111, the rotating wheel 21 is opposite to the code channel 111, the contact part 22 of the rotating wheel 21 is always externally connected with a voltage through the input circuit 12, when the contact part 22 is in contact with the conductive region 1111 on the code channel 111, a current can be transmitted to the inside of the ultra-smooth code wheel 11 through the conductive region 1111, the receiving circuit 23 is arranged inside the ultra-smooth code wheel 11 or inside the code wheel assembly 1, the current inside the ultra-smooth code wheel 11 can be received, and a signal of a certain code system can be output, at this time, an additional connecting wire is not required to be arranged between the code wheel assembly 1 and the reading assembly 2, the winding of the connecting wire is not caused, and a conductive slip ring is not required to be arranged, so that the conductive connection can be realized.
Further, referring to fig. 7, as a specific embodiment of the contact-type ultra-smooth encoder provided by the present invention, in order to enhance the accuracy and resolution of the entire encoder, multiple code channels 111 may be provided, and each code channel 111 needs to correspond to at least one contact component 22; a plurality of contact members 22 are arranged on the same rotating disc 21, the positions of the contact members 22 correspond to the positions of the code channels 111, and one or more contact members 22 can slide on the same code channel 111.
Further, referring to fig. 6, as a specific embodiment of the contact type super-sliding encoder provided by the present invention, the contact part 22 further includes a fixed head 221 and an elastic member 222, the fixed head 221 is fixedly connected to the rotating disc 21 through the elastic member 222, one side of the fixed head 221 facing the super-sliding code disc 11 has an arc-shaped surface, the super-sliding sheet 223 is fixed to one side of the arc-shaped surface closest to the super-sliding code disc 11, that is, the super-sliding sheet 223 is located at the bottom end of the whole fixed head 221, and only one super-sliding sheet 223 may be fixed to the bottom end of the fixed head 221, and one super-sliding sheet group may also be fixed, that is, a super-sliding sheet group with a larger size is formed after the multiple super-sliding sheets 223 are assembled.
Both sides face of super gleitbretter 223 is the arcwall face, can avoid whole super gleitbretter 11 to jolt this moment, and the arch of side can cause the damage to super gleitbretter 223, forms the transition face through the arcwall face, avoids directly colliding super gleitbretter 11.
Furthermore, the second magnetic member 224 is arranged in each of the fixed head 221 and the ultra-sliding code disc 11, the fixed head 221 is magnetically adsorbed on the ultra-sliding code disc 11, and the second magnetic member 224 is matched with the elastic member 222, so that the ultra-sliding sheet 223 can be always attached to the ultra-sliding code disc 11, and the separation of the ultra-sliding sheet 223 and the encoding and detection results is avoided from being influenced.
As an alternative embodiment of the present embodiment, the code wheel assembly 1 can also be connected with a fixed part, and the reading assembly 2 is connected with the external rotating shaft 7, so as to measure the rotating speed of the external rotating shaft 7; or the coded disc assembly 1 and the reading assembly 2 are respectively connected with two rotating external rotating shafts, and the differential speed of the two external rotating shafts can be measured.
As another alternative embodiment of this embodiment, the housing 3 may also be fixedly connected to the reading assembly 2, a buffer layer 4 is padded between the housing 3 and the reading assembly 2, one side of the buffer layer 4 is fixedly connected to the housing 3, and the other side is fixedly connected to the reading assembly 2; in this case, the adjustment limiting member 5 may be disposed between the code wheel assembly 1 and the housing 3, and may limit the position of the code wheel assembly 1.
As another alternative embodiment of this embodiment, the adjustment limiting member 5 may not be provided, and the buffer layer 4 may be compressed to the lowest by performing pre-tightening during assembly, and then the housing 3 and the external rotating shaft are fixed from the outside, respectively, so that the positions of the code disc assembly 1 and the reading assembly 2 may be fixed.
As another alternative embodiment of this embodiment, the adjustment limiting member 5 may not use the first magnetic member, but may use other connecting members such as an elastic buffer pad or a spring, which can connect the reading assembly 2 and the housing 1 instead.
As another alternative embodiment of this embodiment, for monitoring the current signal inside the touch encoder, please refer to FIG. 3, a voltage is always applied to the conductive region 1111 of the ultra-sliding code disc 11 by the input circuit 12, when the contact member 22 contacts the conductive region 1111 of the code track 111, the current can be transmitted to the contact member 22 through the conductive region 1111, and a receiving circuit 23 is disposed inside the contact member 22 or inside the reading assembly 2, which can receive the current inside the contact member 22 and output a signal with a certain code.
As another alternative embodiment of this embodiment, the contact component 22 may not be provided with the elastic component 222, and the fixed head 221 is directly and fixedly connected with the rotating disc 21, in this case, the buffering of the fixed head 221 is adjusted only by the buffering layer 4 and the adjustment limiting component 5; the bottom surface of the fixed head 221 may also be a straight surface or a plane surface with other shapes, and the bottom surface of the fixed head 221 does not directly abut against the rotating disc 21, so as to avoid affecting the ultra-smooth contact.
Example 2
Referring to fig. 4 and 5, as another embodiment of the contact type ultra-smooth encoder provided by the present invention, the difference between the present embodiment and embodiment 1 is: the shell 3 is fixedly connected with the reading assembly 2, a buffer layer 4 is padded between the shell 3 and the reading assembly 2, one side of the buffer layer 4 is fixedly connected with the shell 3, and the other side of the buffer layer 4 is fixedly connected with the reading assembly 2; the buffer layer 4 can support the reading assembly 2, and the coded disc assembly 1 and the reading assembly 2 are in contact fit, so that the coded disc assembly 1 and the reading assembly 2 can be relatively fixed in the inner part of the shell 3, and the coded disc assembly 1 is prevented from being separated during bumping.
The two side surfaces of the ultra-smooth coded disc 11 are provided with the code channels 111, the number of the rotating discs 21 is two, the two rotating discs 21 are respectively located on the two opposite sides of the ultra-smooth coded disc 11, the two rotating discs 21 on the two sides are fixedly connected, the two rotating discs 21 can synchronously rotate relative to the ultra-smooth coded disc 11, the contact parts 22 on the two sides can simultaneously contact with the code channels 111 on the two sides of the ultra-smooth coded disc 11, and the contact parts 22 on the two sides jointly limit the position of the ultra-smooth coded disc 11.
The contact parts 22 on the two sides can be simultaneously contacted with the ultra-smooth coded disc 11, and can be simultaneously contacted and matched with the ultra-smooth coded disc 11 to realize data coding, so that the reliability of the whole ultra-smooth coded disc 11 can be improved, the contact stability of the contact parts 22 and the ultra-smooth coded disc 11 is ensured, and the space for improving the data precision is larger.
Referring to the circuit connection manner in embodiment 1, the input circuit 12 is disposed inside the contact component 22, the receiving circuit 23 is disposed inside the conductive region 1111, and the contact components 22 on both sides can be conducted with the conductive region 1111 to form a path and output codes, so that the contact stability can be ensured, the reliability of the entire encoder can be improved, and it is ensured that the contact component 22 can be conducted with the conductive region 1111 all the time.
Further, the two sides of the ultra-smooth code wheel 11 are both provided with the rotating discs 21, and at the moment, the position between the code wheel assembly 1 and the reading assembly 2 can be limited through the contact parts 22 at the two sides, so that the adjusting limiting part 5 can be eliminated. Of course, according to practical situations and specific requirements, in other embodiments of the present invention, the adjustment limiting member 5 may be further provided, and the only specific limitation is not provided here.
As another alternative embodiment of this embodiment, for monitoring the current signal inside the touch encoder, when the positions of the contact members 22 on the two sides are opposite to each other, the following manner can be adopted, for referring to fig. 5, the touch encoder further includes an additional circuit 6, the additional circuit 6 is respectively connected to the two contact members 22 on the two sides of the super-sliding code disc 11, and the two contact members 22 on the two sides are conducted through the conductive region 1111, and when both the contact members 22 are in contact with and conducted through the conductive region 1111, the on signal can be output; when the two contact members 22 rotate to the insulation region 1112, conduction cannot be achieved, and a non-conduction signal is output. The contact parts 22 on the two sides are connected with the ultra-smooth code disc 11, voltage is applied through the additional circuit 6, the applied voltage can be larger, the reliability of the whole encoder is improved, conductive devices such as a conductive sliding ring and the like do not need to be additionally arranged, the conduction can be achieved directly through the two contact parts 22, the circuit structure is simpler, and the monitoring result is more accurate.
Example 3
As a specific implementation manner of the contact type ultra-smooth encoder provided by the present invention, the difference between this embodiment and embodiments 1 and 2 is that: the code channel 111 has a power generation region 1113 and a non-power generation region 1114, and the contact member 22 forms an ultra-smooth contact and a schottky contact with the power generation region 1113. When the contact part 22 slides in the power generation region 1113, the principle of the ultra-sliding micro-generator can be utilized to generate current, the non-equilibrium electron drift process in the relative sliding process of metal/semiconductor is utilized to generate power, and the extremely high current density (210 Am) can be achieved-2) And power density (7 Wm)-2)。
Through the principle of the ultra-smooth micro-generator, external voltage does not need to be applied, the contact part 22 is in sliding contact with the power generation area 1113, power generation can be achieved, the circuit structure is simpler, the current generated by the generator can be received directly through the induction circuit, and if the ultra-smooth micro-generator is positioned in the power generation area 1113 to slide, a current signal can be received and a specific code can be output; if the non-power generation area 1114 slides, the current signal cannot be received, and a specific code is output, so that code transmission can be realized.
Further, the super-slip sheet 223 is a semiconductor material having a single-crystal two-dimensional interface, such as graphite, graphene, molybdenum disulfide, tungsten diselenide, tungsten disulfide, or black phosphorus, the power generation region 1113 is a semiconductor material or a metal material having an atomically flat surface, such as any one of silicon, gallium arsenide, indium gallium arsenic, zinc oxide, germanium, gallium nitride, or indium phosphide, and the non-power generation region 1114 is an atomically flat insulating material, such as a non-conductive material such as silicon oxide.
At this time, the code channel includes a code channel 111 and a monitoring code channel 112, the code channel 111 includes a power generation region 1113 and a non-power generation region 1114, the power generation region 1113 and the non-power generation region 1114 are arranged at intervals, and the code channel can correspond to a unique position through a special design; the monitoring code channel 112 is composed of the power generation area 1113, that is, the contact component 22 can always contact with the power generation area 1113 and output a digital code, when the output is interrupted, the measurement result may have an inaccurate condition, and an alarm can be sent out or the measurement result can be distinguished from a correct count, so that the measurement accuracy is further enhanced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (11)
1. Contact type ultra-smooth encoder, including code wheel subassembly (1) and with read subassembly (2) of code wheel subassembly (1) relative rotation, its characterized in that:
the code wheel assembly (1) comprises an ultra-smooth code wheel (11), the ultra-smooth code wheel (11) is provided with at least one code channel (111), and the code channel (111) is provided with an atomic-level flat surface;
the reading assembly (2) comprises at least one rotating disc (21), the rotating disc (21) is opposite to the ultra-smooth code disc (11), at least one contact part (22) is arranged on the rotating disc (21), the contact part (22) slides along the code track (111), the contact part (22) comprises at least one ultra-sliding sheet (223), and the ultra-sliding sheet (223) is in ultra-sliding contact with the atomic-level flat surface and outputs a code signal;
the code channel (111) is provided with a power generation region (1113) and a non-power generation region (1114), the super-sliding sheet (223) and the power generation region (1113) form super-sliding contact and Schottky contact and emit current, and the super-sliding sheet (223) and the non-power generation region (1114) are only in super-sliding contact.
2. The contact ultra-smooth encoder of claim 1, wherein: the power generation region (1113) is made of a semiconductor material or a metal material with an atomic-level flat surface, and the super-slip sheet (223) is made of a semiconductor material with a single-crystal two-dimensional interface.
3. The contact ultra-smooth encoder of claim 2, wherein: the ultra-sliding piece (223) is characterized by further comprising an induction circuit, wherein the induction circuit is electrically connected with two side faces of the ultra-sliding piece (223) respectively.
4. The contact ultra-smooth encoder of claim 1, wherein: the ultra-smooth code disc (11) further comprises a monitoring code channel (112), and the monitoring code channel (112) is always in contact conduction with the contact component (22).
5. The contact ultra-smooth encoder of claim 4, wherein: one side of the same rotating disc (21) is provided with at least two contact parts (22), the contact parts (22) are respectively opposite to the coding code channel (111) and the monitoring code channel (112), and the coding code channel (111) and the contact parts (22) are the same for one or more contact parts (22) to slide.
6. The contact type ultra-smooth encoder according to any one of claims 1 to 5, wherein: the code wheel reading device is characterized by further comprising a shell (3), wherein the shell (3) is arranged on the outer sides of the code wheel assembly (1) and the reading assembly (2);
the shell (3) is fixedly connected with the coded disc assembly (1) or the reading assembly (2), and a buffer layer (4) is arranged between the shell (3) and the coded disc assembly (1) or the reading assembly (2).
7. The contact ultra-smooth encoder of claim 6, wherein: the reading device is characterized by further comprising an adjusting limiting part (5), wherein the adjusting limiting part (5) is located between the shell (3) and the reading assembly (2) or the coded disc assembly (1), and acting force of the adjusting limiting part (5) on the shell (3) is opposite to acting force of the buffer layer (4) on the shell (3).
8. The contact ultra-smooth encoder of claim 7, wherein: the adjusting limiting part (5) comprises at least two first magnetic parts which are arranged oppositely, the first magnetic parts are respectively arranged on the inner side of the shell (3) and the outer side of the reading assembly (2) or the coded disc assembly (1), and the polarities of the two first magnetic parts are the same or opposite.
9. The contact ultra-smooth encoder of claim 1, wherein: the contact part (22) further comprises a fixed head (221) and an elastic piece (222), and the fixed head (221) is fixedly connected with the rotating disc (21) through the elastic piece (222).
10. The contact ultra-smooth encoder of claim 9, wherein: one side of the fixed head (221) facing the super-sliding coded disc (11) is provided with an arc-shaped surface, and the super-sliding disc (223) is fixed on one side, closest to the super-sliding coded disc (11), of the arc-shaped surface.
11. The contact ultra-smooth encoder of claim 9, wherein: second magnetic pieces (224) are arranged in the fixed head (221) and the ultra-smooth coded disc (11), and the fixed head (221) is magnetically adsorbed on the ultra-smooth coded disc (11).
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| CN202110559771.4A CN112985472B (en) | 2021-05-21 | 2021-05-21 | Contact type ultra-smooth encoder |
| PCT/CN2021/118222 WO2022241977A1 (en) | 2021-05-21 | 2021-09-14 | Contact type super-lubricity encoder |
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| CN202110559771.4A CN112985472B (en) | 2021-05-21 | 2021-05-21 | Contact type ultra-smooth encoder |
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| CN112985472B true CN112985472B (en) | 2021-09-21 |
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| CN112985472A (en) | 2021-06-18 |
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