CN110297448A - A kind of food processor - Google Patents
A kind of food processor Download PDFInfo
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- CN110297448A CN110297448A CN201910553264.2A CN201910553264A CN110297448A CN 110297448 A CN110297448 A CN 110297448A CN 201910553264 A CN201910553264 A CN 201910553264A CN 110297448 A CN110297448 A CN 110297448A
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- signal
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- analog switch
- sampling
- light current
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
Abstract
The embodiment of the invention discloses a kind of food processor, which includes: main control module, light current acquisition module and exchange-column shift circuit, and light current acquisition module is connected with main control module；The signal output end of exchange-column shift circuit is connected with an analog digital A/D mouth of light current acquisition module, and exchange-column shift circuit includes at least the first signal sampling unit and second signal sampling unit；Wherein within the same period after food processor powers on, a carry out signal acquisition is selected from the first signal sampling unit and second signal sampling unit, to realize that the first signal sampling unit and second signal sampling unit timesharing carry out signal acquisition.Reduce coupler needle number and AD mouthfuls of resources by an AD mouthfuls of acquisition time two-way temperature signals by the example scheme, reduce circuit cost, ensure that the reliability of pulping process and effects on slurry making, improves the service life of machine.
Description
Technical field
The present embodiments relate to cooking equipment designing technique, espespecially a kind of food processor.
Background technique
The light current acquisition module of existing food processor (such as soy bean milk making machine) is by the slurry temperature of acquisition, route plate temperature or electricity
The signals such as machine temperature pass through isolation communication transfer to main control module, and main control module adaptively adjusts pulping process.
One, the type that light current acquisition module is placed in head has the following deficiencies:
Light current acquisition module continuous acquisition signal is transferred to main control module according to Communication Control agreement, and control is complicated, anti-dry
It is poor to disturb ability, light current acquisition module need to configure multi-channel A/D acquisition port, and chip cost is high；
Two, the side type that light current acquisition module is placed in cup body has the following deficiencies:
Multi way temperature signal is detected to realize, if not having light current acquisition module in head, coupler need to be configured accordingly
Needle number, there are also power supplies, need coupler needle number more；If there is light current acquisition module in head, coupler is needed to configure
Connection and power supply；Cup is easily taken up when coupler needle number excessively will limit the design of structural modeling, user lifts head
Body is also possible to that cup body is caused to topple over slurries scald skin, increase additional cost, coupler needle number mistake on this basis when serious
The reliabilities for reducing connection more.
Summary of the invention
The embodiment of the invention provides a kind of food processor, can reduce coupler needle number, simplify acquisition signal processing
Control, guarantee pulping process reliability and effects on slurry making, hoisting machine service life and improve user experience.
In order to reach purpose of the embodiment of the present invention, the embodiment of the invention provides a kind of food processor, the food adds
Work machine may include: main control module, light current acquisition module and exchange-column shift circuit, the light current acquisition module and the master control
Module is connected；One analog digital A/D mouth phase of the signal output end of the exchange-column shift circuit and the light current acquisition module
Even, the exchange-column shift circuit includes at least the first signal sampling unit and second signal sampling unit；
Wherein, within the same period after the food processor powers on, from the first signal sampling unit and described
A carry out signal acquisition is selected in second signal sampling unit, to realize that the first signal sampling unit and the second signal are adopted
Sample unit timesharing carries out signal acquisition.
In an exemplary embodiment of the present invention, the food processor can also include head and cup body, the timing
Switching circuit is set on the wiring board of the head,
In the same period after the food processor powers on, from the first signal sampling unit and described
Selected in binary signal sampling unit a carry out signal acquisition may include: within the first period after the food processor powers on,
The first signal is acquired by the first signal sampling unit；Within the second period after first period, pass through described
Binary signal sampling unit acquires second signal.
In an exemplary embodiment of the present invention, the exchange-column shift circuit may include: single pole double throw analog switch and
Resistance capacitance RC circuit；
Wherein, by the partial pressure of the VCC power supply of the light current acquisition module be the single pole double throw analog switch and
The RC circuit power supply, and the height of the output voltage signal of the RC circuit controls the single pole double throw analog and switchs not
Switch between the same period.
In an exemplary embodiment of the present invention, the main control module and the light current acquisition module are set to the cup body
On, it is connected between the exchange-column shift circuit and the light current acquisition module by coupler；
The RC circuit includes first resistor and first capacitor；The second end of the first resistor and the first capacitor
First end is connected, the second end ground connection of the first capacitor；
The single pole double throw analog switch includes: analog switch chip, the first sampling resistor and the second sampling resistor；It is described
First sampling resistor samples single as the first signal sampling unit, second sampling resistor as the second signal
Member；
One end of the pull-up resistor of the VCC power supply and the light current acquisition module the first AD mouthfuls by described
Coupler is connected with the voltage input end of the first end of the first resistor and the analog switch chip；
The second end of the first resistor is connected with the first signal port of the analog switch chip；First signal
Signal output end of the port as the exchange-column shift circuit；
The second signal port of the analog switch chip is connected with the first end of first sampling resistor, the simulation
The third signal port of switch chip is connected with the first end of second sampling resistor；Described in the second signal port is used as
First signal sampling end, the third signal port as the second signal sampling end,
The second end of first sampling resistor and the second end of second sampling resistor ground connection；
The ground terminal of the light current acquisition module is connect by the coupler and the second end of first sampling resistor
Ground is connected with the ground connection of the second end of second sampling resistor.
In an exemplary embodiment of the present invention, the main control module and the light current acquisition module are set to the head
On；
The RC circuit includes first resistor and first capacitor；The second end of the first resistor and the first capacitor
First end is connected, the second end ground connection of the first capacitor；
The single pole double throw analog switch includes: analog switch chip, the first sampling resistor and the second sampling resistor；It is described
First sampling resistor samples single as the first signal sampling unit, second sampling resistor as the second signal
Member；
One end of the pull-up resistor of the VCC power supply and the light current acquisition module the first AD mouthfuls with described the
The voltage input end of the first end of one resistance and the analog switch chip is connected；
The second end of the first resistor is connected with the first signal port of the analog switch chip；First signal
Signal output end of the port as the exchange-column shift circuit；
The second signal port of the analog switch chip is connected with the first end of first sampling resistor, the simulation
The third signal port of switch chip is connected with the first end of second sampling resistor；Described in the second signal port is used as
First signal sampling end, the third signal port as the second signal sampling end,
The second end of first sampling resistor and the second end of second sampling resistor ground connection；
The ground terminal of the light current acquisition module is adopted with the ground connection of the second end of first sampling resistor and described second
The ground connection of the second end of sample resistance is connected.
In an exemplary embodiment of the present invention, within first period, the analog switch of the analog switch chip
Movable end is on the second signal port, and first signal port is made to be connected with the second signal port, and described
One sampling resistor acquires first signal；And the RC circuit charging, when the RC circuit is charged to preset threshold, institute
It states analog switch movable end to be on the third signal port, makes first signal port and the third signal port phase
Even, into second period；
Within second period, second sampling resistor acquires the second signal.
In an exemplary embodiment of the present invention, the power supply of the single pole double throw analog switch is by the VCC power supply
By the pull-up resistor and first sampling resistor, alternatively, the pull-up resistor is obtained with second sampling resistor partial pressure
?.
In an exemplary embodiment of the present invention, the duration of first period is according to default calculating formula, first electricity
The capacitance of the resistance value of resistance and the first capacitor, which calculates, to be obtained.
In an exemplary embodiment of the present invention, the default calculating formula includes: T1=(R1+R2) * C1；Wherein, T1 is
The duration of first period, R1 are the resistance value of the first resistor, and C1 is the capacitance of the first capacitor, and R2 is preset
Fixed resistance value.
In an exemplary embodiment of the present invention, the duration T1 of the first period meets: T1≤(Vl/Vm) * R1*C1；
Wherein, Vm is after the RC circuit is fully charged, the input of first signal port of the analog switch chip
Level signal；The lowest level signal that Vl is exported when being the RC circuit output voltage shakiness.
In an exemplary embodiment of the present invention, the duration of the first period meets: 45-55 seconds.
The beneficial effect of the embodiment of the present invention may include:
1, the food processor of the embodiment of the present invention may include: main control module, light current acquisition module and exchange-column shift
Circuit, the light current acquisition module are connected with the main control module；The signal output end of the exchange-column shift circuit with it is described weak
One analog digital A/D mouth of electric acquisition module is connected, and the exchange-column shift circuit includes at least the first signal sampling unit and the
Binary signal sampling unit；Wherein, within the same period after the food processor powers on, from the first signal sampling unit
With a carry out signal acquisition is selected in the second signal sampling unit, to realize the first signal sampling unit and described second
Signal sampling unit timesharing carries out signal acquisition.By the example scheme, believed by an AD mouthfuls of acquisition time two-way temperature
Number, reduce coupler needle number, and reduce the AD mouth resource of light current acquisition module, reduces circuit cost, pass through timesharing
Acquisition simplifies acquisition signal processing control, ensure that the reliability of pulping process and effects on slurry making, improves the use of machine
Service life simultaneously improves user experience.
2, the exchange-column shift circuit of the embodiment of the present invention may include: single pole double throw analog switch and resistance capacitance RC
Circuit；Wherein, by the partial pressure of the VCC power supply of the light current acquisition module be the single pole double throw analog switch and it is described
The power supply of RC circuit, and the single pole double throw analog is controlled by the height of the output voltage signal of the RC circuit and is switched not
Switch between the same period.By the example scheme, side type head is realized under the premise of no power supply, is passed through
It combines VCC as the power supply of analog switch and signal acquisition port using the AD of light current acquisition module mouth, further reduces coupling
Needle number is closed, is reduced costs；And the single pole double throw analog is controlled by the height of the output voltage signal of the RC circuit
Switch switches between first period and second period, and principle is simple, easy to implement.
3, the power supply of the single pole double throw analog switch of the embodiment of the present invention is passed through on described by the VCC power supply
Pull-up resistor and first sampling resistor, alternatively, the pull-up resistor and second sampling resistor partial pressure obtain.Pass through the reality
A scheme is applied, the power supply of analog switch chip is acquired in port lines by multiplexing in AD, solves analog switch chip
The problem of power supply, reduces connecting line all the way, further reduces coupler needle number.
4, for the embodiment of the present invention within first period, the analog switch movable end of the analog switch chip is in institute
It states on second signal port, first signal port is made to be connected with the second signal port, first sampling resistor is adopted
Collect first signal；And the RC circuit charging, when the RC circuit is charged to preset threshold, the analog switch is living
Moved end is on the third signal port, and first signal port is made to be connected with the third signal port, into described
Second period；Within second period, second sampling resistor acquires the second signal.By the example scheme,
So that the signal port of analog switch chip realizes switching by the height of the charge and discharge level signal of RC circuit, it is at low cost, and
Reliably, and then the purpose that unlike signal is detected by AD mouthfuls of timesharing all the way is realized.
5, the duration of first period of the embodiment of the present invention according to default calculating formula, the resistance value of the first resistor and
The capacitance of the first capacitor, which calculates, to be obtained.By the example scheme, by the setting of device parameters, it is suitable to configure
Switching time, guarantee master control acquisition filtering processing the time be it is enough, avoid signal fluctuation that signal is caused to be judged by accident, guarantee system
The accuracy and stabilization of sampling.
6, the duration T1 of the first period of the embodiment of the present invention meets: T1≤(Vl/Vm) * R1*C1；Wherein, Vm is described
After RC circuit is fully charged, the level signal of first signal port input of the analog switch chip；Vl is the RC electricity
The lowest level signal exported when the output voltage shakiness of road.By the example scheme, main control module in the first period ensure that
The signal of acquisition is first signal, such as the temperature or motor temperature of the wiring board of head；The main control module within the second period
The signal of acquisition is second signal, such as slurry temperature, to further ensure the accuracy and stabilization for guaranteeing systematic sampling.
The other feature and advantage of the embodiment of the present invention will illustrate in the following description, also, partly from explanation
It is become apparent in book, or understand through the implementation of the invention.The purpose of the embodiment of the present invention and other advantages can pass through
Specifically noted structure is achieved and obtained in the specification, claims and drawings.
Detailed description of the invention
Attached drawing is used to provide one for further understanding technical solution of the embodiment of the present invention, and constituting specification
Point, it is used to explain the present invention the technical solution of embodiment together with embodiments herein, does not constitute to the embodiment of the present invention
The limitation of technical solution.
Fig. 1 (a) is a kind of structural schematic diagram of the food processor of the embodiment of the present invention；
Fig. 1 (b) is another structural schematic diagram of the food processor of the embodiment of the present invention；
Fig. 2 is the exchange-column shift circuit diagram of the embodiment of the present invention；
Fig. 3 is temperature measurement circuit structural schematic diagram when the light current acquisition module of the embodiment of the present invention is set on cup body；
Fig. 4 is the circuit connection signal of temperature measurement circuit when the light current acquisition module of the embodiment of the present invention is set on cup body
Figure；
Fig. 5 is temperature measurement circuit structural schematic diagram when the light current acquisition module of the embodiment of the present invention is set on head；
Fig. 6 is the circuit connection signal of temperature measurement circuit when the light current acquisition module of the embodiment of the present invention is set on head
Figure.
Specific embodiment
Understand in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing pair
The embodiment of the present invention is described in detail.It should be noted that in the absence of conflict, embodiment and reality in the application
The feature applied in example can mutual any combination.
Step shown in the flowchart of the accompanying drawings can be in a computer system such as a set of computer executable instructions
It executes.Also, although logical order is shown in flow charts, and it in some cases, can be to be different from herein suitable
Sequence executes shown or described step.
Embodiment one
The embodiment of the invention provides a kind of food processor, and as shown in Fig. 1 (a), the food processor may include:
Main control module 33, light current acquisition module 32 and exchange-column shift circuit 31, the light current acquisition module 32 and the main control module
33 are connected；One analog digital A/D mouth a of the signal output end of the exchange-column shift circuit 31 and the light current acquisition module 32
It is connected, the exchange-column shift circuit at least may include the first signal sampling unit b and second signal sampling unit c；
Wherein, within the same period after the food processor powers on, from the first signal sampling unit b and described
A carry out signal acquisition is selected in second signal sampling unit c, to realize the first signal sampling unit b and the second signal
Sampling unit c timesharing carries out signal acquisition.
In an exemplary embodiment of the present invention, for main control module 33, light current acquisition module 32 and exchange-column shift electricity
The setting position on road 31 and specific implementation with no restrictions, can be according to different application scenarios and demand self-defining.
In an exemplary embodiment of the present invention, by the example scheme, pass through an AD mouthfuls of acquisition time two-way temperature
Signal is spent, reduces coupler needle number, and reduce the AD mouth resource of light current acquisition module, reduces circuit cost, pass through
Acquisition time simplifies acquisition signal processing control, ensure that the reliability of pulping process and effects on slurry making, improves machine
Service life simultaneously improves user experience.
Embodiment one
The embodiment on the basis of example 1, gives setting side of the exchange-column shift circuit 31 in food processor
Formula embodiment.
In an exemplary embodiment of the present invention, the food processor can also include head and cup body, the timing
Switching circuit is set on the wiring board of the head,
In an exemplary embodiment of the present invention, as shown in Fig. 1 (b), the food processor may include head 1 and cup
Body 2 can also include: main control module 33, light current acquisition module 32 and the timing for cutting being set on the wiring board of the head 1
Circuit 31 is changed, the light current acquisition module 32 is connected with the main control module 33；The signal of the exchange-column shift circuit 31 exports
End is connected with an analog digital A/D mouth a of the light current acquisition module 32, and the exchange-column shift circuit 31 includes at least first
Signal sampling unit b and second signal sampling unit c；
In the same period after the food processor powers on, from the first signal sampling unit and described
Selected in binary signal sampling unit a carry out signal acquisition may include: within the first period after the food processor powers on,
The first signal is acquired by the first signal sampling unit；Within the second period after first period, pass through described
Binary signal sampling unit acquires second signal.
In an exemplary embodiment of the present invention, which can include but is not limited to the wiring board of the head
Temperature or motor temperature；Second signal can include but is not limited to slurry temperature.
Currently, main control module 33 is arranged on cup body 2, and 1 space of head is limited, cannot place in side type
When light current acquisition module 32, if acquisition slurry temperature, route plate temperature or motor temperature, coupler is in setting zero curve, firewire
On the basis of need to configure power supply VCC, slurry temperature, route plate temperature or motor temperature, ground wire etc., coupler at least needs in total
Want six needles.
In an exemplary embodiment of the present invention, by increasing exchange-column shift circuit 31, so that light current acquisition module 32 is logical
Cross one AD mouthfuls both can timesharing detect different temperature signals, reduce the internal resource demand of light current acquisition module 32, light current
Acquisition module 32 and the communication of main control module 33 need to only transmit a data, and main control module 33 judges slurry temperature by timesharing reading
With route plate temperature, coupler only needs to configure AD mouthfuls of connecting lines, a ground wires, coupler on the basis of configuring zero curve, firewire
Four needles are needed in total, and relatively former scheme reduces by two needles, except harness and coupler cost substantially reduce, when head is placed or lifted
Coupler contact engaging and separating force greatly reduces, when avoiding that coupler needle number excessively will limit the design of structural modeling, user lifts head
Cup body is easily taken up, the generation for causing cup body to topple over the various problems such as slurries scald skin is also possible to when serious, and in this base
Additional cost is reduced on plinth, avoiding coupler needle number excessively reduces the risk of reliability of connection.
Currently, under the premise of head space is enough, light current acquisition module 32 can be placed on side type or conventional type
In head 1, coupler needle number is constant, and light current acquisition module 31 needs to detect slurry temperature, water level, motor temperature, wiring board
The multi-signals such as temperature, when the signal kinds or quantity difference of different type detections, light current acquisition module 32 need to configure compared with
More AD mouths, has that resources of chip is inadequate, and replacement chip will increase great amount of cost again, and light current acquisition module 32 is not
Energy standard configurations, software control processing difficulty increase, and reduce the reliability of complete machine.
In an exemplary embodiment of the present invention, light current acquisition module 32 can be placed in head 1, can also be placed in cup body
In 2, for light current acquisition module 32 specific placement location with no restrictions.
In an exemplary embodiment of the present invention, the switching switched by timing automatic imitation in exchange-column shift circuit 31 is real
Existing timesharing detects signal, can configure multiple analog switches according to the actual situation, reduces accessory cost, ensure that different type of machines situation
The unified standard of lower light current acquisition module 32, reduces the complexity of logic control between main control module 33 and light current acquisition module 32
Degree.
Embodiment two
The embodiment on the basis of example 1, as shown in Fig. 2, a kind of composition for giving exchange-column shift circuit 31 is real
Apply example.
In an exemplary embodiment of the present invention, the exchange-column shift circuit may include: single pole double throw analog switch 311
With resistance capacitance RC circuit 312；
It wherein, is single pole double throw analog switch by the partial pressure of the VCC power supply of the light current acquisition module 32
311 and the RC circuit 312 power supply, and the height of the output voltage signal of the RC circuit 312 controls the single-pole double throw
Analog switch 311 switches between the different periods, such as switches between first period and second period.
In an exemplary embodiment of the present invention, single-pole double throw mould is set on the wiring board of the head of food processor 1
Quasi- switch 311 and RC circuit 312, using AD mouthfuls of a for light current acquisition module 32 as temperature collection signal port and power supply
Power supply, 311 periphery configuration RC circuit 312 of single pole double throw analog switch realize mould by the height of the level signal of RC circuit 312
Quasi- switching realizes switching time time action by 312 parameter configuration of RC circuit, utilizes the AD mouth of light current acquisition module 32
A is switched to single pole double throw analog and is powered.
In an exemplary embodiment of the present invention, it by the example scheme, realizes side type head and is not supplying
Under the premise of power supply, by using the AD of light current acquisition module mouth a combination VCC as the power supply of analog switch and signal acquisition
Port further reduces coupling needle number, reduces costs；And the height control of the output voltage signal by the RC circuit
It makes the single pole double throw analog switch to switch between first period and second period, principle is simple, easy to implement.
Embodiment three
The embodiment on the basis of example 2, as shown in Figure 3, Figure 4, gives the main control module 33 and described weak
When electric acquisition module 32 is set on the cup body 2, single pole double throw analog switch 311 and resistance capacitance RC circuit 312 it is specific
Connect embodiment.
In an exemplary embodiment of the present invention, the main control module 33 and the light current acquisition module 32 are set to described
On cup body 2, it is connected between the exchange-column shift circuit 31 and the light current acquisition module 32 by coupler 4；
The RC circuit 312 may include first resistor 3121 and first capacitor 3122；The of the first resistor 3121
Two ends are connected with the first end of the first capacitor 3122, the second end ground connection of the first capacitor 3122；
The single pole double throw analog switch 311 may include: analog switch chip 3111 (i.e. U1), the first sampling resistor
3112 (i.e. RT1) and the second sampling resistor 3113 (i.e. RT2)；First sampling resistor 3112 can be used as first signal
Sampling unit b, second sampling resistor 3113 can be used as the second signal sampling unit c；
First AD mouth 321 of one end of the pull-up resistor R3 of the VCC power supply and the light current acquisition module 32
Pass through the coupler 4 and the first end of the first resistor 3121 and the voltage input end of the analog switch chip 3111
V+ is connected；
The second end of the first resistor 3121 is connected with the first signal port IN of the analog switch chip 3111；Institute
State signal output end of the first signal port IN as the exchange-column shift circuit 31；
The of the second signal port NO of the analog switch chip 3111 and first sampling resistor 3112 (i.e. RT1)
One end is connected, the third signal port NC of the analog switch chip 3111 and second sampling resistor 3113 (i.e. RT2)
First end is connected；The second signal port NO is as first signal sampling end, and the third signal port NC is as institute
Second signal sampling end is stated,
The second end of first sampling resistor 3112 and the second end of second sampling resistor 3113 ground connection；
The ground terminal of the light current acquisition module 32 passes through the coupler 4 and the second of first sampling resistor 3112
The ground connection at end is connected with the ground connection of the second end of second sampling resistor 3113.
In an exemplary embodiment of the present invention, 2 part of cup body: light current acquisition module 32 can pass through with main control module 31
Isolation communication, using AD mouthfuls of a for the light current acquisition module 32 in cup body 1 as the acquisition port RT_1 of temperature signal, by
There is no VCC power supply inside head 1, it is 1 part of head that the power supply VCC that can use light current acquisition module 32, which connects pull-up resistor R2,
Power supply is provided and is connected to acquisition port RT_1, acquisition port RT_1 passes through the signal wire 41 of coupler 4 and adopting for 1 part of head
Collection port RT_2 is connected with ground wire GND_2, and ground wire GND_1 passes through the ground wire 42 of coupler 4 and the ground wire GND_2 of 1 part of head
Connection.
In an exemplary embodiment of the present invention, the power supply of the single pole double throw analog switch 311 is powered electric by the VCC
Source is by the pull-up resistor R3 and first sampling resistor 3112, alternatively, the pull-up resistor R3 and second sampling
The partial pressure of resistance 3113 obtains.
In an exemplary embodiment of the present invention, 1 part of head: the power supply of the light current acquisition module 32 on cup body 2 is utilized
The pull-up resistor R3 and RT1 of VCC power with the partial pressure of RT2 to the V+ of analog switch chip U1.
In an exemplary embodiment of the present invention, pass through pull-up using the power supply VCC of the light current acquisition module 32 on cup body 2
Resistance R3 is to 3121,3122 chargings, 3121,3122 charging level sentencing as analog switch chip U1 switch conversion interface IN
Disconnected foundation.
In an exemplary embodiment of the present invention, when food processor powers on, the analog switch of analog switch chip U1 is set
In the end NO, 1 part light current acquisition module 32 of cup body detects RT1, when RC circuit charge value reaches the decision threshold of interface IN, mould
The analog switch of quasi- switch chip U1 is placed in the end NC, and cup section light current acquisition module 32 detects RT2.
In an exemplary embodiment of the present invention, entire acquisition process control need to only utilize two needles in coupler 4.
The signal acquisition of existing temperature measurement circuit at least need to configure signal wire, power supply, three kinds of connecting lines, if using coupling
When clutch connects, increased costs, reliability are low.
In an exemplary embodiment of the present invention, circuit design through the embodiment of the present invention realizes side type head
Under the premise of no power supply, by using the AD of chip mouth a combination VCC as the power supply of analog switch and signal acquisition
The acquisition time of route plate temperature or motor temperature, slurry temperature is realized in port, has reached reduction coupling needle number and has reduced cost
Purpose, promote the reliability of soy bean milk making machine and improve user experience.
Example IV
The embodiment on the basis of example 2, as shown in Figure 5, Figure 6, gives the main control module 33 and described weak
When electric acquisition module 32 is set on the head 1, single pole double throw analog switch 311 and resistance capacitance RC circuit 312 it is specific
Connect embodiment.
In an exemplary embodiment of the present invention, the main control module 31 and the light current acquisition module 32 are set to described
On head 1；
The RC circuit 312 may include first resistor 3121 and first capacitor 3122；The of the first resistor 3121
Two ends are connected with the first end of the first capacitor 3122, the second end ground connection of the first capacitor 3122；
The single pole double throw analog switch 311 includes: analog switch chip 3111 (i.e. U1), 3112 and of the first sampling resistor
Second sampling resistor 3113；First sampling resistor 3112 can be used as the first signal sampling unit b, and described second adopts
Sample resistance 3113 can be used as the second signal sampling unit c；
First AD mouth 321 of one end of the pull-up resistor R3 of the VCC power supply and the light current acquisition module 32
It is connected with the voltage input end V+ of the first end of the first resistor 3121 and the analog switch chip 3111；
The second end of the first resistor 3121 is connected with the first signal port IN of the analog switch chip 3111；Institute
State signal output end of the first signal port IN as the exchange-column shift circuit 31；
The of the second signal port NO of the analog switch chip 3111 and first sampling resistor 3112 (i.e. RT1)
One end is connected, the third signal port NC of the analog switch chip 3111 and second sampling resistor 3113 (i.e. RT2)
First end is connected；The second signal port NO is as first signal sampling end, and the third signal port NC is as institute
Second signal sampling end is stated,
The second end of first sampling resistor 3112 and the second end of second sampling resistor 3113 ground connection；
The ground connection of the ground terminal of the light current acquisition module 32 and the second end of first sampling resistor 3112 and described
The ground connection of the second end of second sampling resistor 3113 is connected.
In an exemplary embodiment of the present invention, head section: light current acquisition module 32 passes through with main control module 31 is isolated
Communication is powered using the partial pressure of the pull-up resistor R2 and RT1 or RT2 of the power supply VCC of light current acquisition module 32 to the V+ of chip U1.
In an exemplary embodiment of the present invention, it is given using the power supply VCC of light current acquisition module 32 by pull-up resistor R3
3121,3122 charging, judgment basis of 3121,3122 charging level as analog switch chip U1 switch conversion interface IN.
In an exemplary embodiment of the present invention, when powering on, the analog switch of analog switch chip U1 is placed in the end NO, light current
Acquisition module 32 detects RT1, and when RC circuit charge value reaches the decision threshold of interface IN, the simulation of analog switch chip U1 is opened
Pass is placed in the end NC, and cup section light current acquisition module 32 detects RT2.
In an exemplary embodiment of the present invention, entire acquisition process control need to only utilize one of light current acquisition module 32
AD mouthfuls, it can be achieved that two-way temperature signal acquisition time.
In an exemplary embodiment of the present invention, circuit design through this embodiment realizes conventional type utilization and adopts
AD mouthful acquisition time two-way temperature signals for collecting chip, reduce the AD mouth resource of acquisition chip, reduction configuration circuit at
This, simplifies acquisition process by acquisition time, improves the reliability of acquisition signal.
Embodiment five
The embodiment gives on the basis of embodiment three or example IV through the realization point of analog switch chip 3111
When the specific implementation embodiment that acquires.
In an exemplary embodiment of the present invention, within first period, the simulation of the analog switch chip 3111
Switch activity end is on the second signal port NO, makes the first signal port IN and the second signal port NO phase
Even, first sampling resistor 3112 acquire the wiring board of the head 1 temperature or the motor temperature；And the RC electricity
Road 312 is charged, and when the RC circuit 312 is charged to preset threshold, the analog switch movable end is in the third signal
On the NC of port, the first signal port IN is made to be connected with the third signal port NC, into second period；
Within second period, second sampling resistor 3113 acquires the slurry temperature.
In an exemplary embodiment of the present invention, the switching of analog switch chip 3111 passes through switch conversion interface IN
Judge whether the level of RC circuit (i.e. charge-discharge circuit) reaches preset threshold, when reaching preset threshold level, analog switch
The switch of chip 3111 can be switched to the end NC, and when the level of charge-discharge circuit is lower than preset threshold level, switch can be cut
It changes and is parked in the end NO.
In an exemplary embodiment of the present invention, charge-discharge circuit is charged by resistance R3,3121 to capacitor C1 by VCC,
When capacitor is fully charged, it can be formed and be divided by the internal resistance of resistance 3121, the port IN and GND of chip 3111, partial pressure value
Higher than preset threshold, to realize switching.
In an exemplary embodiment of the present invention, charge-discharge circuit passes through resistance 3121, the port IN and GND of chip 3111
Internal resistance, capacitor C1 formed the first discharge loop, connect temperature sensor with NO or NC by the port COM of 3121, chip 3111
(such as described first sampling resistor 3112 and second sampling resistor 3113), capacitor C1 form the second discharge loop.
In an exemplary embodiment of the present invention, it is powered in a period of time in machine, the simulation of analog switch chip 3111
Switch can be in normally off, and light current acquisition module 32 detects head wiring board or motor temperature, and light current acquisition module 32 will
Route plate temperature or motor temperature signal isolation output are to main control module 33, and main control module 33 is according to route plate temperature or motor temperature
Degree signal judges whether machine is continuous slurrying；When RC circuit 312 charges to threshold level, analog switch, which can switch, to be in
Normally open, light current acquisition module 32 detect slurry temperature, and light current acquisition module 32 exports slurry temperature signal isolation to master
Module 33 is controlled, main control module 33 controls slurrying process according to slurry temperature signal adaptive.
In an exemplary embodiment of the present invention, one group of temperature signal of the isolation transmission in real time of light current acquisition module 32 is to master control
Module 33, two-way temperature signal can be transmitted by same group of data, and timesharing analysis judgment data, main control module can be according to RC
The parameter configuration of circuit limits the duration T1 of the first period, powers in T1 duration in machine, the temperature of the judgement input of main control module 33
Spending signal is route partitioned signal or motor temperature signal, and other than T1 duration, the temperature signal of the judgement input of main control module 33 is
Slurry temperature signal.
In an exemplary embodiment of the present invention, analog switch chip switch conversion interface IN passes through RC charge-discharge circuit
The height of level signal realizes switching, low cost it is reliable so that realize by AD mouthful timesharing detection temperature sensor RT1 all the way,
The temperature signal of RT2.
Embodiment six
The embodiment gives on the basis of embodiment three or example IV and obtains analog switch by RC circuit configuration
The realization embodiment of chip switch switching time.
In an exemplary embodiment of the present invention, the duration of first period is according to default calculating formula, first electricity
The resistance value R1 of resistance and the capacitance of the first capacitor are calculated and are obtained.
In an exemplary embodiment of the present invention, the default calculating formula may include: T1=(R1+R2) * C1；Wherein,
T1 is the duration of first period, and R1 is the resistance value of the first resistor, and C1 is the capacitance of the first capacitor, and R2 is pre-
If fixed resistance value.
In an exemplary embodiment of the present invention, the charging time of RC circuit is T1=(R1+R2) * C1, since power supply is set
The relationship resistance R2 set is fixed value, and the charging time of RC charge-discharge circuit can be by first resistor 3121 and first capacitor 3122
It determines, meets under temperature acquisition time demand, time T1 is determined by RC parameter selection.
In an exemplary embodiment of the present invention, the switching time (the duration T1 of the first period) that RC circuit configuration determines is made
The foundation of the timesharing judgement of slurry temperature and route plate temperature (or motor temperature) is judged for master control block region point.
In an exemplary embodiment of the present invention, RC circuit configuration can determine analog switch chip switching when
Between, T1 can be determined by RC parameter selection, resistance R1 resistance value will more greatly, and capacitor C1 capacitance is smaller.Because due to charge circuit
It is attached on temperature sampling signal, if the resistance value of resistance R1 is too small, charging current causes greatly temperature signal drop-down to significantly affect and adopt
Sample precision.
In an exemplary embodiment of the present invention, by RC circuit reasonable disposition, analog switch exchange-column shift is realized, master control
Module 31 can distinguish determine which signal the temperature signal of acquisition is according to the time parameter T1 timesharing of configuration, guarantee acquisition signal
Reliability, to avoid judging by accident.
In an exemplary embodiment of the present invention, by configuring suitable switching duration T1, it is ensured that main control module 1 acquires
Filtering processing the time be it is enough, avoid signal fluctuation that signal is caused to be judged by accident.
Embodiment seven
The embodiment gives the specific embodiment by circuit configuration parameter on the basis of embodiment six.
In an exemplary embodiment of the present invention, the duration of the first period meets: 45-55 seconds.
In an exemplary embodiment of the present invention, temperature sensor RT1, RT2 can choose with identical temperature curve
Sensor, and can use the identical guarantee power supply of temperature bound resistance value and stablize, pull-up resistor resistance value can be passed by temperature
Sensor RT1, RT2 determine that the resistance value R1 of first resistor can be 5M Ohmic resistance, and the capacitance C1 of first capacitor can be 10uf electricity
Hold, charging duration T can satisfy: 45-55 seconds, for example, selection 50 seconds, to guarantee the standard of temperature sampling type before switching
Really.
In an exemplary embodiment of the present invention, by the setting of device parameters, ensure that systematic sampling accuracy and
Stability.
Embodiment eight
The embodiment gives a kind of limit of analog switch chip switching time on the basis of embodiment three or four
Determine embodiment.
In an exemplary embodiment of the present invention, the duration T1 of the first period meets: T1≤(Vl/Vm) * R1*C1；
Wherein, Vm is after the RC circuit is fully charged, the input of first signal port of the analog switch chip
Level signal；The lowest level signal that Vl is exported when being the RC circuit output voltage shakiness.
In an exemplary embodiment of the present invention, the level of analog switch switching works as RC there are unstable range Vl-Vh
When the level of circuit is in this voltage range, the erroneous judgement of temperature acquisition signal may cause if the random switching of switch, for example,
Already start to acquire slurry temperature, control module 31 is but because the calculated T1 of voltage instability is excessive, so that control module
31 are mistaken for still route plate temperature or the motor temperature that currently acquire, in order to avoid the generation of this phenomenon, temperature sensor RT1
Acquisition duration can guarantee in following range: T1≤(Vl/Vm) * R1*C1, to guarantee the temperature sensor in T1 duration
RT1 is in temperature collection signal；Similarly, can guarantee in following range in the acquisition duration of temperature collection sensor RT2: T2 >
=(Vh/Vm) * R1*C1, to guarantee that temperature sensor RT2 is in temperature collection signal after T1 duration；Wherein, Vm is that RC is fully charged
The level signal of chip I N-port input afterwards, R1 are the resistance value of the first resistor, and C1 is the capacitance of the first capacitor.
In an exemplary embodiment of the present invention, the logic judgment control of temperature signal collection is as follows:
When machine powers on, the switch of analog switch chip is in the end NO, and within the T1 time, the light current of cup section acquires mould
The temperature signal of the AD mouth acquisition RT1 of block 32, by temperature value judge wiring board or motor whether be it is hot, if it is hot,
Then system can carry out respective handling, if not hot, then can execute slurrying process；Wherein, this hot refers to that temperature is big
In or equal to preset temperature threshold state；
When duration is more than T2, the main control module 31 of cup section is then judged as that the switch of analog switch chip has been switched to
The end NC, the AD mouth of the light current acquisition module 32 of cup section start to acquire the temperature signal of RT2, judge slurries by temperature value
Temperature executes corresponding processing according to slurrying process according to different slurry temperatures.By clamping, analog switch core can be made
The switch of piece is constantly in the end NC until machine powers off；
When machine power-off, the RC circuit of analog switch chip starts to discharge, when the end the IN level of analog switch chip is low
When threshold level, switching sets the end NO.
In an exemplary embodiment of the present invention, since the level of analog switch switching is there are unstable range, work as mould
When quasi- switch is in this range, analog switch is unstable when working, it is understood that there may be acquisition signal erroneous judgement；When the switching of analog switch
Length is determined that being equivalent to analog switch automatic switchover is timing, if within the set time by RC charge-discharge circuit configuration parameter
Timesharing detection judgement is not completed, then there can be the risk of signal erroneous judgement.
In an exemplary embodiment of the present invention, according to the switching characteristic of analog switch chip, using reasonably adopting
Collection judges time interval and logic, realizes the accurate acquisition judgement of each temperature signal, ensure that the reliability of slurrying.
It will appreciated by the skilled person that whole or certain steps, system, dress in method disclosed hereinabove
Functional module/unit in setting may be implemented as software, firmware, hardware and its combination appropriate.In hardware embodiment,
Division between the functional module/unit referred in the above description not necessarily corresponds to the division of physical assemblies；For example, one
Physical assemblies can have multiple functions or a function or step and can be executed by several physical assemblies cooperations.Certain groups
Part or all components may be implemented as by processor, such as the software that digital signal processor or microprocessor execute, or by
It is embodied as hardware, or is implemented as integrated circuit, such as specific integrated circuit.Such software can be distributed in computer-readable
On medium, computer-readable medium may include computer storage medium (or non-transitory medium) and communication media (or temporarily
Property medium).As known to a person of ordinary skill in the art, term computer storage medium is included in for storing information (such as
Computer readable instructions, data structure, program module or other data) any method or technique in the volatibility implemented and non-
Volatibility, removable and nonremovable medium.Computer storage medium include but is not limited to RAM, ROM, EEPROM, flash memory or its
His memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storages, magnetic holder, tape, disk storage or other
Magnetic memory apparatus or any other medium that can be used for storing desired information and can be accessed by a computer.This
Outside, known to a person of ordinary skill in the art to be, communication media generally comprises computer readable instructions, data structure, program mould
Other data in the modulated data signal of block or such as carrier wave or other transmission mechanisms etc, and may include any information
Delivery media.
Claims (10)
1. a kind of food processor, which is characterized in that the food processor include: main control module, light current acquisition module and
Exchange-column shift circuit, the light current acquisition module are connected with the main control module；The signal output end of the exchange-column shift circuit
It is connected with an analog digital A/D mouth of the light current acquisition module, the exchange-column shift circuit includes at least the first signal sampling
Unit and second signal sampling unit；
Wherein, within the same period after the food processor powers on, from the first signal sampling unit and described second
A carry out signal acquisition is selected in signal sampling unit, to realize that the first signal sampling unit and second signal sampling are single
First timesharing carries out signal acquisition.
2. food processor according to claim 1, which is characterized in that the food processor further includes head and cup
Body, the exchange-column shift circuit are set on the wiring board of the head,
In the same period after the food processor powers on, from the first signal sampling unit and second letter
Selecting a carry out signal acquisition in number sampling unit includes: within the first period after the food processor powers on, by described
First signal sampling unit acquires the first signal；Within the second period after first period, adopted by the second signal
Sample unit acquires second signal.
3. food processor according to claim 2, which is characterized in that the exchange-column shift circuit includes: single-pole double throw
Analog switch and resistance capacitance RC circuit；
Wherein, by the partial pressure of the VCC power supply of the light current acquisition module be the single pole double throw analog switch and it is described
The power supply of RC circuit, and the height of the output voltage signal of the RC circuit controls the single pole double throw analog switch different
Switch between period.
4. food processor according to claim 3, which is characterized in that the main control module and the light current acquisition module
It is set on the cup body, is connected between the exchange-column shift circuit and the light current acquisition module by coupler；
The RC circuit includes first resistor and first capacitor；The first of the second end of the first resistor and the first capacitor
End is connected, the second end ground connection of the first capacitor；
The single pole double throw analog switch includes: analog switch chip, the first sampling resistor and the second sampling resistor；Described first
Sampling resistor is as the first signal sampling unit, and second sampling resistor is as the second signal sampling unit；
One end of the pull-up resistor of the VCC power supply and the light current acquisition module the first AD mouthfuls pass through the coupling
Device is connected with the voltage input end of the first end of the first resistor and the analog switch chip；
The second end of the first resistor is connected with the first signal port of the analog switch chip；First signal port
Signal output end as the exchange-column shift circuit；
The second signal port of the analog switch chip is connected with the first end of first sampling resistor, the analog switch
The third signal port of chip is connected with the first end of second sampling resistor；The second signal port is as described first
Signal sampling end, the third signal port as the second signal sampling end,
The second end of first sampling resistor and the second end of second sampling resistor ground connection；
The ground terminal of the light current acquisition module by the ground connection of the coupler and the second end of first sampling resistor and
The ground connection of the second end of second sampling resistor is connected.
5. food processor according to claim 3, which is characterized in that the main control module and the light current acquisition module
It is set on the head；
The RC circuit includes first resistor and first capacitor；The first of the second end of the first resistor and the first capacitor
End is connected, the second end ground connection of the first capacitor；
The single pole double throw analog switch includes: analog switch chip, the first sampling resistor and the second sampling resistor；Described first
Sampling resistor is as the first signal sampling unit, and second sampling resistor is as the second signal sampling unit；
First AD mouthfuls and first electricity of one end of the pull-up resistor of the VCC power supply and the light current acquisition module
The voltage input end of the first end of resistance and the analog switch chip is connected；
The second end of the first resistor is connected with the first signal port of the analog switch chip；First signal port
Signal output end as the exchange-column shift circuit；
The second signal port of the analog switch chip is connected with the first end of first sampling resistor, the analog switch
The third signal port of chip is connected with the first end of second sampling resistor；The second signal port is as described first
Signal sampling end, the third signal port as the second signal sampling end,
The second end of first sampling resistor and the second end of second sampling resistor ground connection；
The ground connection of the second end of the ground terminal of the light current acquisition module and first sampling resistor and the second sampling electricity
The ground connection of the second end of resistance is connected.
6. food processor according to claim 4 or 5, which is characterized in that
Within first period, the analog switch movable end of the analog switch chip is on the second signal port,
First signal port is set to be connected with the second signal port, first sampling resistor acquires first signal；And
And the RC circuit charging, when the RC circuit is charged to preset threshold, the analog switch movable end is in the third
On signal port, first signal port is made to be connected with the third signal port, into second period；
Within second period, second sampling resistor acquires the second signal.
7. food processor according to claim 4 or 5, which is characterized in that the power supply of the single pole double throw analog switch
By the VCC power supply by the pull-up resistor and first sampling resistor, alternatively, the pull-up resistor and described the
Two sampling resistors partial pressure obtains.
8. food processor according to claim 4 or 5, which is characterized in that the duration of first period is according to default
The capacitance of calculating formula, the resistance value of the first resistor and the first capacitor, which calculates, to be obtained.
9. food processor according to claim 8, which is characterized in that the default calculating formula includes: T1=(R1+
R2)*C1；Wherein, T1 is the duration of first period, and R1 is the resistance value of the first resistor, and C1 is the first capacitor
Capacitance, R2 are preset fixed resistance value.
10. food processor according to claim 3, which is characterized in that the duration T1 of the first period meets: T1≤
(Vl/Vm)*R1*C1；
Wherein, Vm is the level of first signal port input of the analog switch chip after the RC circuit is fully charged
Signal；The lowest level signal that Vl is exported when being the RC circuit output voltage shakiness.
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|---|---|---|---|
| CN201910553264.2A CN110297448A (en) | 2019-06-25 | 2019-06-25 | A kind of food processor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910553264.2A CN110297448A (en) | 2019-06-25 | 2019-06-25 | A kind of food processor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112806875A (en) * | 2019-11-16 | 2021-05-18 | 九阳股份有限公司 | Pulping control method of wall-breaking food processor and wall-breaking food processor |
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Application publication date: 20191001 |