CN206946542U - A kind of incremental encoder counting device - Google Patents
A kind of incremental encoder counting device Download PDFInfo
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- CN206946542U CN206946542U CN201720461814.4U CN201720461814U CN206946542U CN 206946542 U CN206946542 U CN 206946542U CN 201720461814 U CN201720461814 U CN 201720461814U CN 206946542 U CN206946542 U CN 206946542U
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Abstract
The utility model discloses a kind of incremental encoder counting device, including：Signal conditioning circuit and counter circuit；The signal conditioning circuit is used for the steering state of output motor, and the steering state is relevant with an existing state for A, B phase signals from previous state to the hopping edge of an existing state with A, B phase signals；The counter circuit, for receiving the steering state and being counted.By the hopping edge of A, B phase signals, the situation that a state is showed in conjunction with A, B phase obtains the steering state signal of motor, and completes to count by counter circuit.The technical scheme can avoid causing the not high situation of count accuracy because encoder shakes by detecting the hopping edges of A, B phase signals simultaneously.The technique device can be widely applied to the occasion higher to counting accuracy requirement.
Description
Technical field
The technical field of motor is the utility model is related to, more particularly to a kind of incremental encoder counting device.
Background technology
The phase signals of A, B two that existing incremental encoder counting device exports to encoder count, and turn to obtain
Speed and positional information.To A, B phase signals count generally use mode be a phase signals wherein hopping edge (rising edge or under
Drop edge) judge the level states of another phase signals.As shown in figure 1, in B rising edge, a-signal is high level, then motor is just
Direction rotates, and now carries out plus 1 counts；As shown in Fig. 2 in B rising edge, a-signal is low level, then motor revolves for opposite direction
Turn, encoder carries out subtracting 1 counting.
When low speed commutates, encoder is often accompanied by jitter phenomenon, not high enough using this method of counting accuracy, mistake be present
The situation of counting.For example commutated near N points, now B signal is shaken due to the left and right in commutation process can produce multiple risings
Edge, as shown in figure 3, now a-signal is still high level, it will result in repeatedly plus 1 count.
Utility model content
The purpose of this utility model is：A kind of counting device of incremental encoder is provided, improves the accuracy of counting.
The solution that the utility model solves its technical problem is：A kind of incremental encoder counting device, including：Letter
Number modulate circuit and counter circuit；The signal conditioning circuit be used for output motor steering state, the steering state with
A, B phase signals are relevant with an existing state for A, B phase signals to the hopping edge of an existing state from previous state；The counter electricity
Road, for receiving the steering state and being counted.
Further, hopping edge is converted into by pulse signal using two-stage d type flip flop circuit, the pulse signal passes through conversion
Circuit is converted into the signal for describing the steering state.
Further, the conversion circuit is data selector, and the data selection control terminal of the data selector is used to connect
Receive A, B phase signals of an existing state.
Further, the data selector selects 1 data selector 74LS153 for double 4.
Further, the counter circuit is cascaded using 4 tetrad counter 74LS193.
The beneficial effects of the utility model are：By the hopping edge of A, B phase signals, the feelings of a state are showed in conjunction with A, B phase
Condition obtains the steering state signal of motor, and completes to count by counter circuit.The technical scheme by detecting A, B phase simultaneously
The hopping edge of signal, it can avoid causing the not high situation of count accuracy because encoder shakes.The technique device can answer extensively
For requiring higher occasion to counting accuracy.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described.Obviously, described accompanying drawing is part of the embodiment of the present utility model, rather than entirely
Portion's embodiment, those skilled in the art on the premise of not paying creative work, can also obtain it according to these accompanying drawings
His design and accompanying drawing.
Fig. 1 is the judgement schematic diagram that counting device rotates to positive direction before not improving；
Fig. 2 is the judgement schematic diagram that counting device rotates to opposite direction before not improving；
Fig. 3 is the jitter conditions schematic diagram that counting device easily occurs before not improving；
Fig. 4 is the connection diagram of signal conditioning circuit；
Fig. 5 is the timing diagram of pulse signal；
Fig. 6 is the connection diagram of counter circuit.
Embodiment
Design, concrete structure and caused technique effect of the present utility model are carried out below with reference to embodiment and accompanying drawing
Clear, complete description, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is part of the embodiment of the present utility model, rather than whole embodiments, based on embodiment of the present utility model, the skill of this area
The other embodiment that art personnel are obtained on the premise of not paying creative work, belong to the model of the utility model protection
Enclose.In addition, all connection/annexations being previously mentioned in text, not singly refer to component and directly connect, and refer to can be according to specific reality
Situation is applied, by adding or reducing couple auxiliary, to form more excellent draw bail.Every technology in the utility model is special
Sign, can be with combination of interactions on the premise of not conflicting conflict.
Embodiment 1, with reference to figure 4, incremental encoder counting device can carry out adding 1 according to the steering state of motor and subtract 1
Calculate, according to counting principle commonly used in the art, when the steering state of motor rotates for positive direction, counting device adds 1, works as motor
Steering state for opposite direction rotate when, counting device subtracts 1, the present embodiment according to this commonly use counting means design.Certainly, count
Turn to also to have corresponding to device plus-minus 1 and do not meet the principle, such case should also belong in the scope of protection of the utility model.
Principle of the present utility model：With the various combination situation of the present level state of A, B phase signals and last level state
Carry out plus-minus counting.The level state of B phase signals and A phase signals is designated as BA.It is described as follows：BA level states share 4 kinds of feelings
Condition：00、01、10、11.
According to the code-disc optical grating construction of encoder, when BA is now arranged in 00 state, its previous state be only possible to be 01 or
Person 10.When previous state is 01, show to be transferred to 00 state by 01 state, A phase signals produce trailing edge, judge turning for motor
It is opposite direction rotation to state, carries out subtracting 1 counting；When previous state is 10, show to be transferred to 00 state, B phases by 10 states
Signal produces trailing edge, judges that the steering state of motor rotates for positive direction, carries out plus 1 counts.
When BA is now arranged in 01 state, its previous state is 00 or 11.When previous state is 00, show by 00 state
01 state is transferred to, A phase signals produce rising edge, judge that the steering state of motor rotates for positive direction, carry out plus 1 counts.
When previous state is 11, show to be transferred to 01 state by 11 states, B phase signals produce trailing edge, judge the steering shape of motor
State is opposite direction rotation, carries out subtracting 1 counting.
When BA is now arranged in 10 states, its previous state is 11 or 00.When previous state is 11, show by 11 states
10 states are transferred to, A phase signals produce trailing edge, judge that the steering state of motor rotates for positive direction, carry out plus 1 counts.
When previous state is 00, show to be transferred to 10 states by 00 state, B phase signals produce rising edge, judge the steering shape of motor
State is opposite direction rotation, carries out subtracting 1 counting.
When BA is now arranged in 11 states, its previous state is 10 or 01.When previous state is 10, show by 10 states
11 states have been transferred to it, A phase signals produce rising edge, and the steering state for judging motor is opposite direction rotation, carry out subtracting 1 counting.
When previous state is 01, show to be transferred to 11 states by 01 state, B phase signals produce rising edge, judge the steering shape of motor
State rotates for positive direction, carries out plus 1 counts.
The steering state of motor is with A, B phase signals from previous state to the existing hopping edge of a state and showing for A, B phase signals
One state meets the logical relation of following form 1：
| The existing states of BA | A, B phase signals hopping edge situation | Steering state |
| 00 | A↓ | Reversely |
| 00 | B↓ | It is positive |
| 01 | A↑ | It is positive |
| 01 | B↓ | Reversely |
| 10 | A↓ | It is positive |
| 10 | B↑ | Reversely |
| 11 | A↑ | Reversely |
| 11 | B↑ | It is positive |
Table 1
Wherein, A ↓ expression：A phase signals produce trailing edge；A ↑ expression：A phase signals produce rising edge；B ↓ expression：B phase signals
Produce trailing edge；B ↑ expression：B phase signals produce rising edge.
Counting device of the present utility model：As shown in figure 4, input signal CLK is high frequency sampling clock, input signal A,
B phase signals.
Using two-stage d type flip flop U1A and U1B, two-stage d type flip flop U1C and U1D with being carried with door U2A, U2B, U2C, U2D
Take A, B hopping edge and be converted into pulse signal.Output with door U2A is signal A rising edge, otherwise not as being high level
It is rising edge；Output with door U2B is signal A trailing edge, is not otherwise trailing edge as being high level；With door U2C output
It is such as high level, is signal B rising edge, is not otherwise rising edge；Output with door U2D is under signal B as being high level
Edge is dropped, is not otherwise trailing edge.It is as shown in Figure 5 with the pulse signal sequential of door U2A ~ U2D outputs.Thus it is clear that U2A, U2B, U2C,
U2D exports the rising edge time of the high level difference corresponding A of clock, A trailing edge moment, B rising edge time, B
The trailing edge moment.Because having used two-stage d type flip flop to be cached, the high level of U2A ~ U2D outputs and corresponding A, B signal jump
Become along the delay for there are two clocks.
Pin is output to after being selected with the double 4 four road signals for selecting 1 data selector 74LS153 to export U2A ~ U2D
1Y、2Y.Signal 1y on pin 1Y is designed as expression and rotated forward, and the signal 2y on 2Y is designed as representing to reversely rotate.
74LS153 input pin A, B is data selection control terminal.When data select control terminal BA for 00 when, according to
74LS153 truth table, input pin 1C0 and 1Y are connected, and 2C0 and 2Y is connected., should be by under the A for representing reverse rotation according to table 1
Drop along state (output with door U2B) is output to 2Y, represents that the B trailing edges state output that rotates forward is (defeated with door U2D to 1Y
Go out).Therefore U2B outputs are attached to 74LS153 2C0, U2D exports the 1C0 for being connected to 74LS153.
When BA is 01,1C1 connects with 1Y, and 2C1 connects with 2Y.The rising edge shape for the A that expression should be now rotated forward
State is output to 1Y (output with door U2A), and the trailing edge state (output with door U2D) for the B for representing to reversely rotate is output to 2Y.
Therefore U2A is exported and is connected with 1C1, U2D outputs are connected with 2C1.
When BA is 10,1C2 and 1Y is connected, and 2C2 and 2Y is connected.The trailing edge shape for the A that expression should be now rotated forward
State (output with door U2B) is output to 1Y, and the rising edge state (output with door U2C) for the B for representing to reversely rotate is output to 2Y.
Therefore be connected U2B output with 1C2, U2C output is connected with 2C2.
When BA is 11,1C3 and 1Y is connected, and 2C3 and 2Y is connected.It should will now represent the A of reverse rotation rising edge shape
State (output with door U2A) is output to 2Y, and the rising edge state (output with door U2C) for the B for representing to rotate forward is output to 1Y.
Therefore be connected U2A output with 2C3, U2C output is connected with 1C3.
As shown in fig. 6, signal conditioning circuit exports：Represent the signal 1y of motor forward condition, represent motor reverse state
Signal 2y；1y and 2y are connected to the input of counter circuit.Cascaded with 4 tetrad counter 74LS193, on
The carry pulse of level chip adds count pulse input to be connected with subordinate chip, borrows pulse with subtracting count pulse input phase
Even, reversible incremental countdown is realized.
According to 74LS193 counting sequence, two-way count pulse input UP, DN are wherein all the way in input count pulse
When, another way is necessary for high level, therefore signal 1y, 2y are negated with phase inverter U4A, U4B so that DN during UP input count pulses
For high level, UP is high level when DN inputs count pulse, can correctly be counted so as to ensure that.
The count value CNT of final output is 16bit.When input signal 1y rising edge, CNT adds 1；As input signal 2y
Rising edge when, CNT subtracts 1, realize carried out between 0 ~ 65535 be incremented by countdown.
Better embodiment of the present utility model is illustrated above, but the utility model be not limited to it is described
Embodiment, those skilled in the art can also make a variety of equivalent changes on the premise of without prejudice to the utility model spirit
Type or replacement, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (3)
- A kind of 1. incremental encoder counting device, it is characterised in that including：Signal conditioning circuit and counter circuit；Signal conditioning circuit, for the steering state of output motor, the steering state is with A, B phase signals from previous state to now The hopping edge of one state is relevant with an existing state for A, B phase signals；Hopping edge is converted into by pulse using two-stage d type flip flop circuit Signal, the pulse signal are converted into the signal for describing the steering state by conversion circuit；The conversion circuit is data Selector, the data selection control terminal of the data selector are used for A, B phase signals for receiving an existing state；Counter circuit, for receiving the steering state and being counted.
- A kind of 2. incremental encoder counting device according to claim 1, it is characterised in that：The data selector is Double 4 select 1 data selector 74LS153.
- A kind of 3. incremental encoder counting device according to claim 1, it is characterised in that：The counter circuit is adopted Cascaded with 4 tetrad counter 74LS193.
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| CN201720461814.4U CN206946542U (en) | 2017-04-27 | 2017-04-27 | A kind of incremental encoder counting device |
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| CN201720461814.4U CN206946542U (en) | 2017-04-27 | 2017-04-27 | A kind of incremental encoder counting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107092956A (en) * | 2017-04-27 | 2017-08-25 | 佛山三电智能科技有限公司 | A kind of incremental encoder counting device |
| CN111953353A (en) * | 2020-08-21 | 2020-11-17 | 烟台艾睿光电科技有限公司 | Decoding method and related device of incremental encoder |
-
2017
- 2017-04-27 CN CN201720461814.4U patent/CN206946542U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107092956A (en) * | 2017-04-27 | 2017-08-25 | 佛山三电智能科技有限公司 | A kind of incremental encoder counting device |
| CN111953353A (en) * | 2020-08-21 | 2020-11-17 | 烟台艾睿光电科技有限公司 | Decoding method and related device of incremental encoder |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210426 Address after: 528000 Room 204, 2nd floor, Foshan Aowei Technology Industry Co., Ltd. (workshop b), Songxia Industrial Park, Shishan town, Nanhai District, Foshan City, Guangdong Province Patentee after: Foshan guanwan Intelligent Technology Co.,Ltd. Address before: 528200, Foshan, Guangdong Province, Nanhai District, lion Town, Songgang Pine Industrial Park, Taoyuan Road, No. 19, B workshop, on the third floor, room 304 Patentee before: FOSHAN SANDIAN INTELLIGENT TECHNOLOGY Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An incremental encoder counting device Effective date of registration: 20221226 Granted publication date: 20180130 Pledgee: Foshan Branch of Dah Sing Bank (China) Co.,Ltd. Pledgor: Foshan guanwan Intelligent Technology Co.,Ltd. Registration number: Y2022980029017 |
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Granted publication date: 20180130 Pledgee: Foshan Branch of Dah Sing Bank (China) Co.,Ltd. Pledgor: Foshan guanwan Intelligent Technology Co.,Ltd. Registration number: Y2022980029017 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |