CN206710825U - A kind of food processor control circuit - Google Patents
A kind of food processor control circuit Download PDFInfo
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- CN206710825U CN206710825U CN201720059566.0U CN201720059566U CN206710825U CN 206710825 U CN206710825 U CN 206710825U CN 201720059566 U CN201720059566 U CN 201720059566U CN 206710825 U CN206710825 U CN 206710825U
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Abstract
The utility model discloses a kind of food processor control circuit, belong to appliance field, solves the problems, such as control input waste of resource, solving the technical scheme of the problem includes the control chip that coding-control is switched and electrically connected with coding-control, wherein, the coding-control switch includes a public coding pass and at least two Signal coding passages, terminal C corresponding to the public coding pass electrically connects the AD ports of the control chip, terminal electric connection of power supply corresponding to Signal coding passage.The utility model mainly sets corresponding bleeder circuit, by detection of the control chip to partial pressure value so as to knowing different states, and the direction for knowing encoder rotation must be changed according to partial pressure value, so that it is determined that control input, now, control chip, which needs only provide for an AD port, can carry out detection judgement.
Description
Technical field
Household appliance technical field is the utility model is related to, particularly a kind of food processor control circuit.
Background technology
With not making constant progress for technology, the function of existing food processor is also increasingly abundanter, so as to cause to eat
The mode of the control input of product processing machine is also more complicated, and input control is carried out gradually to various touches by single key switch
Control etc..
Encoder is also widely used in the control of food processor as most common selection input mode.Common volume
Code device is usually to be made up of tri- terminal channels of A/B/C and its metal spring leaf, and three parts are separate, carried by one
The annular reed of 3 contacts realizes connection.Therefore state in having 4 in encoder rotary course, A-C is connected, B-C is connected,
A-B-C is connected, and C is hanging.By connecting control chip MCU, identification state is encoded so as to make corresponding processing.
So in the prior art to encoder control circuit as shown in figure 1, its terminal A and terminal B electrical connection control chips
MCU two I/O ports, MCU is rotationally-varying by the level conversion judgement of two ports, as long as level state is changed with regard to table
Bright encoder has signal input；Control chip MCU by the level change state of two ports come judge the rotating forward of encoder with
Reversion, so as to realize the judgement to rotation input.Although which can effectively be controlled input, due to needing to make
With control chip MCU two port resources so that the wasting of resources, will especially when control chip MCU port resources are limited
Input can not be controlled using encoder.
Utility model content
The utility model purpose to be reached just is to provide a kind of saving system resource, inputs reliable food processor
Control input circuit.
In order to achieve the above object, the utility model adopts the following technical scheme that：A kind of food processor control circuit, bag
Coding-control switch and the control chip electrically connected with coding-control are included, wherein, the coding-control switch includes a public affairs
Coding pass and at least two Signal coding passages altogether, terminal C corresponding to the public coding pass electrically connect the control
The AD ports of chip, terminal electric connection of power supply corresponding to Signal coding passage.
Further, terminal corresponding to the Signal coding passage is described by resistance electric connection of power supply VCC and ground GND
Terminal C passes through pull-up resistor R4 electric connection of power supply VCC.
Further, the coding-control switch includes two Signal coding passages, respectively corresponding terminal A and terminal B, institute
State terminal A and terminal B and pass through resistance electric connection of power supply VCC and ground GND..
Further, the control circuit passes through resistance R1 electricity including resistance R1, resistance R2 and resistance R3, the terminal A
Power supply VCC, the terminal A are connected by resistance R2 GND electrically, the terminal B passes through resistance R3 GND electrically.
Further, the control circuit passes through resistance R1 electricity including resistance R1, resistance R2 and resistance R3, the terminal B
Power supply VCC, the terminal B are connected by resistance R2 GND electrically, the terminal A passes through resistance R3 GND electrically.
Further, the control circuit includes pull-up resistor and grounding resistance, is held corresponding to the Signal coding passage
For son by resistance electric connection of power supply VCC, the terminal C passes through grounding resistance GND electrically.
Further, the coding-control switch includes two Signal coding passages, respectively corresponding terminal A and terminal B, institute
State pull-up resistor and electricity is passed through by resistance R7 electric connection of power supply VCC, the terminal B including resistance R7, resistance R8, the terminal A
Hinder R8 electric connection of power supply VCC.
Further, the coding-control switch includes two Signal coding passages, respectively corresponding terminal A and terminal B, institute
State control circuit and electricity is passed through by resistance R5 electric connection of power supply VCC, the terminal B including resistance R5, resistance R6, the terminal A
R6 GND electrically are hindered, charging capacitor C2 is provided between the terminal C and ground.
Further, limit is provided with corresponding to the public coding pass between terminal C and the AD ports of the control chip
Leakage resistance R9.
Further, filter capacitor C1 is provided with corresponding to the public coding pass between terminal C and ground GND.
After adopting the above technical scheme, the utility model has the following advantages that：Corresponding bleeder circuit is set, passes through control
Detection of the chip to partial pressure value must change the side for knowing encoder rotation according to partial pressure value so as to know different states
To so that it is determined that control input, now, control chip, which needs only provide for an AD port, can carry out detection judgement.Thus, save
MCU internal resource has been saved, while circuit structure detects, the reliability of detection is high, and can choose at random state change
Resolution ratio, the comfort of lifting operation.
Brief description of the drawings
The utility model is described in further detail below in conjunction with the accompanying drawings：
Fig. 1 is control circuit of the prior art；
Fig. 2 is a kind of circuit diagram of food processor control circuit embodiment 1 of the utility model；
Fig. 3 is a kind of time diagram of food processor control circuit embodiment 1 of the utility model；
Fig. 4 is a kind of circuit diagram of food processor control circuit embodiment 2 of the utility model；
Fig. 5 is a kind of time diagram of food processor control circuit embodiment 2 of the utility model；
Fig. 6 is a kind of circuit diagram of food processor control circuit embodiment 3 of the utility model；
Fig. 7 is a kind of circuit diagram of food processor control circuit embodiment 4 of the utility model.
Embodiment
Embodiment 1：
A kind of food processor control circuit, including coding-control switch and the control core electrically connected with coding-control
Piece, it is characterised in that the coding-control switch includes a public coding pass and at least two Signal coding passages,
Terminal C corresponding to the public coding pass electrically connects the AD ports of the control chip, terminal corresponding to Signal coding passage
Electric connection of power supply.
In the present embodiment, terminal corresponding to the Signal coding passage passes through divider resistance electric connection of power supply VCC and ground
GND, the terminal C pass through pull-up resistor R4 electric connection of power supply VCC.The coding-control switch includes two Signal codings and led to
Road, corresponding terminal A and terminal B, the terminal A and terminal B pass through resistance electric connection of power supply VCC and ground GND respectively.Such as Fig. 2 institutes
Show, the control circuit includes resistance R1, resistance R2 and resistance R3, the terminal A pass through resistance R1 electric connection of power supply VCC, institute
Terminal A is stated by resistance R2 GND electrically, the terminal B passes through resistance R3 GND electrically.That is, work as terminal A
When hanging, its voltage is resistance R1 and resistance R2 partial pressure；When terminal B is hanging, its voltage is zero；Terminal C passes through resistance R4
The AD ports come up to power supply VCC while Access Control chip MCU, using the control source control chip MCU that terminal C goes out as electricity
The basis for estimation of buckling.
Its operation principle is as follows：
When encoder, which is rotated to terminal A, to be turned on terminal C, its be equivalent to resistance R1 it is in parallel with resistance R4 after with resistance R2
Partial pressure is carried out, and the voltage after partial pressure is inputted to control chip MCU AD ports, now, control chip MCU by terminal C
The input voltages of AD Port detectings be：
VAC=R2/ [R1*R4/ (R1+R4)+R2) * VCC
When encoder, which is rotated to terminal B, to be turned on terminal C, it is equivalent to resistance R3 and resistance R4 and carries out partial pressure, and will
Voltage after partial pressure is inputted to control chip MCU AD ports, now, control chip MCU AD Port detectings by terminal C
Input voltage is：
VBC=R3/ (R3+R4) * VCC
When encoder is rotated to when terminal A, terminal B, terminal C intercommunications, it is in parallel with resistance R4 that it is equivalent to resistance R1, resistance
R2 is in parallel with resistance R3, and the resistance after two groups of parallel connections carries out series connection partial pressure again, and by the voltage after partial pressure by terminal C input to
Control chip MCU AD ports, now, the input voltage of control chip MCU AD Port detectings is：
VABC=R2*R3/ (R2+R3)/[R1*R4/ (R1+R4)+R2*R3/ (R2+R3)] * VCC
When encoder rotates it is hanging to terminal C when, terminal C is pulled to VCC by resistance R4, now, control chip MCU's
The input voltage of AD Port detectings is VCC.
Assuming that VCC is 5V, 8 AD conversion resolution ratio are 5/ (256-1)=0.02V, as long as the resistance ginseng of selection in theory
Number ensures VAC、VBC、VABC、VC, voltage differences be more than 0.02V, but in order to ensure the degree preferably distinguished, when selected resistance
Resistance meets R1:R2:R3:R4=1:2.2:1:When 4.7, it is ensured that good AD value discriminations, so as to avoid condition adjudgement
Mistake.
So, during setting VCC=5V, VGND=0V, R1=R3=10K Ω, R2=22K Ω, R4=47K Ω：
VAC=R2/ [R1*R4/ (R1+R4)+R2] * VCC=3.64V
VBC=R3/ (R3+R4) * VCC=0.88V
VABC=R2*R3/ (R2+R3)/[R1*R4/ (R1+R4)+R2*R3/ (R2+R3)] * VCC=2.27V
Its corresponding timing diagram under terminal A, terminal B, terminal C difference conducting states is as shown in figure 3, corresponding value such as following table
It is shown：
That is, it is possible thereby to set the rule that control chip MCU detections judge encoder direction of rotation：
CW：5V→3.64V→2.27V→0.88V→5V→3.64V→2.27V→0.88V；
CCW：5V→0.88V→2.27V→3.64V→5V→0.88V→2.27V→3.64V.
Control chip MCU rotate judgement and the judgement of direction of rotation according to the AD changes of collection order, such as when
Voltage corresponding to preceding AD is 3.64V, when the AD value corresponding voltage values of control chip MCU collections are changed into 2.27V, control chip
MCU first confirms that AD values change, then is first judged as there is input, and according to control chip MCU it is default may determine that 3.64V →
2.27V changes, then encoder direction of rotation is rotating forward；If certain 3.64V NextState voltage is 5V, control chip MCU
Judge encoder for reversion.Processing and response otherwise for AD can be that one state MCU of change is responded once, can also shape
State changes multiple MCU responses once, and this is no longer going to repeat them.
It is of course also possible to it is that the terminal B is electrically connected by resistance R1 electric connection of power supply VCC, the terminal B by resistance R2
GND is grounded, the terminal A is by resistance R3 GND electrically, and its principle is consistent with the above, and this is no longer going to repeat them.
Corresponding bleeder circuit is set, by detection of the control chip to partial pressure value so as to know different states, and
The direction for knowing encoder rotation must be changed according to partial pressure value, so that it is determined that control input, now, control chip need only provide for
One AD port can carry out detection judgement.Thus, save MCU internal resource, while circuit structure detects, detection can
It is high by property, and the resolution ratio of state change can be chosen at random, the comfort of lifting operation.
Embodiment 2：
The difference of the present embodiment and above-described embodiment 1 is that the control circuit includes pull-up resistor and grounding resistance, institute
Terminal corresponding to Signal coding passage is stated to electrically connect by grounding resistance by pull-up resistor electric connection of power supply VCC, the terminal C
Ground GND.As shown in figure 4, coding-control switch includes 2 Signal coding passages, distinguish corresponding terminal A and terminal B, it is described on
Pull-up resistor includes resistance R7, resistance R8, the terminal A pass through resistance R8 by resistance R7 electric connection of power supply VCC, the terminal B
Electric connection of power supply VCC.The terminal C passes through resistance R10 GND electrically.That is, when terminal A is hanging, its voltage is
VCC；When terminal B is hanging, its voltage VCC；Terminal C is by resistance R10 GND electrically, and when terminal C is hanging, its voltage is zero.
Terminal C Access Control chips MCU AD ports, the judgement using the control source control chip MCU that terminal C goes out as voltage change
Foundation.
Its operation principle is as follows：
When encoder, which is rotated to terminal A, to be turned on terminal C, it is equivalent to resistance R7 and resistance R10 and carries out partial pressure, and will
Voltage after partial pressure is inputted to control chip MCU AD ports, now, control chip MCU AD Port detectings by terminal C
Input voltage is：
VAC=R10/ (R7+R10) * VCC
When encoder, which is rotated to terminal B, to be turned on terminal C, it is equivalent to resistance R8 and resistance R10 and carries out partial pressure, and will
Voltage after partial pressure is inputted to control chip MCU AD ports, now, control chip MCU AD Port detectings by terminal C
Input voltage is：
VBC=R10/ (R8+R10) * VCC
When encoder is rotated to when terminal A, terminal B, terminal C intercommunications, its be equivalent to resistance R7 it is in parallel with resistance R8 after again
Partial pressure of connecting is carried out with resistance R10, and the voltage after partial pressure is inputted to control chip MCU AD ports by terminal C, this
When, the input voltage of control chip MCU AD Port detectings is：
VABC=R10/ [R7*R8/ (R7+R8)+R10] * VCC
When encoder rotates it is hanging to terminal C when, terminal C is pulled down to GND by resistance R10, now, control chip MCU
The input voltages of AD Port detectings be GND.
Assuming that VCC is 5V, 8 AD conversion resolution ratio=5/ (256-1)=0.02V, as long as the resistance ginseng of selection in theory
Number ensures VAC、VBC、VABC、VC, voltage differences be more than 0.02V, but in order to ensure the degree preferably distinguished, when selected resistance
Resistance meets R7:R8:R10=1:1.6:When 1, it is ensured that good AD value discriminations, so as to avoid condition adjudgement mistake.
So, during setting VCC=5V, VGND=0V, R1=R3=10K Ω, R2=16K Ω,
VAC=R10/ (R7+R10) * VCC=2.5V；
VBC=R10/ (R8+R10) * VCC=1.92V；
VABC=R10/ [R7*R8/ (R7+R8)+R10] * VCC=3.1V；
VC=GND=0V.
Its corresponding timing diagram under terminal A, terminal B, terminal C difference conducting states is as shown in figure 5, corresponding value such as following table
It is shown：
That is, it is possible thereby to set the rule that control chip MCU detections judge encoder direction of rotation：
CW：3.1V→1.9V→0V→2.5V→3.1V→1.9V→0V→2.5V；
CCW：3.1V→2.5V→0V→1.9V→3.1V→2.5V→0V→1.9V.
Control chip MCU rotate judgement and the judgement of direction of rotation according to the AD changes of collection order, such as when
Voltage corresponding to preceding AD is 1.9V, and when the AD value corresponding voltage values of control chip MCU collections are changed into 0V, control chip MCU is first
First confirm that AD values change, then are first judged as there is input, and may determine that 1.9V → 0V becomes according to control chip MCU is default
Change, then encoder direction of rotation is rotating forward；If certain 1.9V NextState voltage is 3.1V, control chip MCU judges to compile
Code device is reversion.Processing and response otherwise for AD can be that one state MCU of change is responded once, can also state change
Once, this is no longer going to repeat them for multiple MCU responses.
Embodiment 3：
The difference of the present embodiment and above-described embodiment is, as shown in fig. 6, coding-control switch includes two signals
Coding pass, corresponding terminal A and terminal B, the control circuit pass through resistance including resistance R5, resistance R6, the terminal A respectively
R5 electric connection of power supply VCC, the terminal B are provided with charging capacitor by resistance R6 GND electrically between the terminal C and ground
C2.Its operation principle is as follows：
Terminal A is electrically connected to power supply VCC by resistance R5, and terminal B is electrically connected to ground GND by resistance R6, and sub- C is by filling
Electric capacity C2 is electrically connected to ground, and takes R5=10K, R6=1K, C2=102, when encoder, which is rotated to terminal A and terminal C, to be connected,
VCC is VCC to charging capacitor C2 quick charges, terminal C points voltage by resistance R1；When encoder is rotated to terminal B and terminal C
During connection, for charging capacitor C2 to resistance R2 repid discharges, terminal C points voltage is 0；When encoder is rotated to terminal A, terminal B, end
During sub- C intercommunications, VCC gives terminal C by resistance R1 and resistance R2 partial pressures, and terminal C voltage is 0.09VCC, and as terminal A and end
Sub- C by connect be transferred to disconnect when, charging capacitor C2 enter discharge process, terminal C points voltage are VCC at a slow speed；Terminal B and end
Sub- C by connect be transferred to disconnect when, terminal C points voltage maintain 0.Therefore, when encoder rotates forward, value is as follows corresponding to each terminal
Table：
| A | ON | ON | OFF | OFF | ON | ON | OFF | OFF |
| B | OFF | ON | ON | OFF | OFF | ON | ON | OFF |
| C | VCC | 0.09VCC | 0 | 0 | VCC | 0.09VCC | 0 | 0 |
When encoder inverts, value such as following table corresponding to each terminal：
| A | OFF | ON | ON | OFF | OFF | ON | ON | OFF |
| B | ON | ON | OFF | OFF | ON | ON | OFF | OFF |
| C | 0 | 0.09Vcc | VCC | VCC | 0 | 0.09VCC | VCC | VCC |
Therefore, it is known that, when encoder rotates forward, the high level dutycycle of terminal C points is 0.25, when encoder inverts, terminal C
The high level dutycycle of point is 0.5, therefore, rotating is can determine whether using the difference of dutycycle.
Embodiment 4：
The difference of the present embodiment and above-described embodiment 1 is, as shown in fig. 7, terminal C corresponding to the public coding pass
Current-limiting resistance R9 is provided between the AD ports of the control chip, avoids exterior static from sealing in circuit and causes control chip MCU
Breakdown.It is of course also possible to for increasing corresponding current-limiting resistance in the circuit of embodiment 2 and 3, this is no longer going to repeat them.
It is of course also possible to be provided with filter capacitor C1 corresponding to the public coding pass between terminal C and ground GND, disappear
Except noise jamming in rotary course.
In addition to above preferred embodiment, the utility model also has other embodiments, and those skilled in the art can root
It is variously modified and deforms according to the utility model, without departing from spirit of the present utility model, the utility model all should be belonged to
Scope defined in appended claims.
Claims (10)
1. a kind of food processor control circuit, including coding-control switch and the control chip electrically connected with coding-control,
Characterized in that, the coding-control switch includes a public coding pass and at least two Signal coding passages, it is described
Terminal C corresponding to public coding pass electrically connects the AD ports of the control chip, and terminal corresponding to Signal coding passage is electrically connected
Connect power supply.
2. food processor control circuit according to claim 1, it is characterised in that corresponding to the Signal coding passage
Terminal passes through pull-up resistor R4 electric connection of power supply VCC by resistance electric connection of power supply VCC and ground GND, the terminal C.
3. food processor control circuit according to claim 2, it is characterised in that the coding-control switch includes two
Individual Signal coding passage, corresponding terminal A and terminal B, the terminal A and terminal B pass through resistance electric connection of power supply VCC and ground respectively
GND。
4. food processor control circuit according to claim 3, it is characterised in that the control circuit includes resistance
R1, resistance R2 and resistance R3, the terminal A are electrically connected by resistance R1 electric connection of power supply VCC, the terminal A by resistance R2
Ground GND, the terminal B pass through resistance R3 GND electrically.
5. food processor control circuit according to claim 3, it is characterised in that the control circuit includes resistance
R1, resistance R2 and resistance R3, the terminal B are electrically connected by resistance R1 electric connection of power supply VCC, the terminal B by resistance R2
Ground GND, the terminal A pass through resistance R3 GND electrically.
6. food processor control circuit according to claim 1, it is characterised in that the control circuit includes pull-up electricity
Resistance and grounding resistance, terminal corresponding to the Signal coding passage are led to by pull-up resistor electric connection of power supply VCC, the terminal C
Cross grounding resistance GND electrically.
7. food processor control circuit according to claim 6, it is characterised in that the coding-control switch includes two
Individual Signal coding passage, respectively corresponding terminal A and terminal B, the pull-up resistor include resistance R7, resistance R8, the terminal A leads to
Cross resistance R7 electric connection of power supply VCC, the terminal B and pass through resistance R8 electric connection of power supply VCC.
8. food processor control circuit according to claim 1, it is characterised in that the coding-control switch includes two
Individual Signal coding passage, corresponding terminal A and terminal B respectively, the control circuit also includes resistance R5, resistance R6, described
Terminal A is by resistance R5 electric connection of power supply VCC, and the terminal B is by resistance R6 GND electrically, between the terminal C and ground
Provided with charging capacitor C2.
9. food processor control circuit according to any one of claims 1 to 7, it is characterised in that the public coding leads to
Current-limiting resistance R9 is provided between terminal C corresponding to road and the AD ports of the control chip.
10. food processor control circuit according to any one of claims 1 to 7, it is characterised in that the public coding leads to
Filter capacitor C1 is provided with corresponding to road between terminal C and ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720059566.0U CN206710825U (en) | 2017-01-18 | 2017-01-18 | A kind of food processor control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720059566.0U CN206710825U (en) | 2017-01-18 | 2017-01-18 | A kind of food processor control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206710825U true CN206710825U (en) | 2017-12-05 |
Family
ID=60472677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720059566.0U Active CN206710825U (en) | 2017-01-18 | 2017-01-18 | A kind of food processor control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206710825U (en) |
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2017
- 2017-01-18 CN CN201720059566.0U patent/CN206710825U/en active Active
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Effective date of registration: 20230515 Address after: Building 2, No. 52, 22nd Street, Baiyang Street, Qiantang New District, Hangzhou City, Zhejiang Province, 310000 Patentee after: Hangzhou Jiuchuang Home Appliances Co.,Ltd. Address before: No. 999, Mei Li Road, Huaiyin District, Ji'nan, Shandong Patentee before: JOYOUNG Co.,Ltd. |