CN110261667A - Bean milling machine lacks beans detection method, system, bean milling machine and motor power detection circuit - Google Patents
Bean milling machine lacks beans detection method, system, bean milling machine and motor power detection circuit Download PDFInfo
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- CN110261667A CN110261667A CN201910402799.XA CN201910402799A CN110261667A CN 110261667 A CN110261667 A CN 110261667A CN 201910402799 A CN201910402799 A CN 201910402799A CN 110261667 A CN110261667 A CN 110261667A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/175—Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
Abstract
The present invention is suitable for bean milling machine technical field, it provides a kind of bean milling machine and lacks beans detection method, system, bean milling machine and motor power detection circuit, this method comprises: carrying out zero point detection to the motor of bean milling machine in real time, and when determining the motor zero crossing, power samples are carried out to the motor, and sampled power is recorded according to sampled result；When the sampling number to the motor is greater than frequency threshold value, effective power is calculated according to multiple sampled powers of record；When determining the effective power less than power threshold, accumulation calculating is carried out according to default accumulated value, to obtain count value；When the count value is greater than count threshold, the motor is closed.The present invention passes through the design to motor progress power samples, the judgement that bean milling machine lacks beans detection is carried out in a manner of using based on power samples, and then scarce beans detection efficiency is effectively raised, it carries out lacking beans detection without hall detector, reduces production cost.
Description
Technical field
The invention belongs to bean milling machine technical field more particularly to a kind of bean milling machine lack beans detection method, system, bean milling machine and
Motor power detection circuit.
Background technique
Bean milling machine generally includes hopper, can place beans material wherein, to convey beans material to bean milling device.Bean milling device is to beans
Material is ground, and the beans material of milled is transported in container.Container can be a part of coffee-maker, become container
Brew basket or similar container.Bean milling machine can also be separately manufactured with coffee-maker, and grinding coffee can be taken out from container therein
And it pours into brew basket.In existing bean milling machine use process, the detecting step for lacking beans is particularly important, because in bean milling machine
In use process, if it detects to lack beans material not in time, then motor can generate after load-less condition long-play
Heat, and then the damage for the motor being easy to cause, reduce the service life of bean milling machine.
Existing bean milling machine is all that scarce beans prompt facility is realized using voltage detecting or hall detector.Usually grinding
After beans machine installs hall detector, carry out lacking beans detection by revolving speed, this mode cost is excessively high.By using voltage detecting
Mode, scarce beans detection error is big, and lot size problem is more, and competitiveness is poor.
Summary of the invention
A kind of bean milling machine of being designed to provide of the embodiment of the present invention lacks beans detection method, system, bean milling machine and motor function
Rate detection circuit, it is intended to solve in existing bean milling machine use process, due to carrying out lacking beans detection using installation hall detector
The excessively high problem of caused cost.
The embodiments of the present invention are implemented as follows, a kind of scarce beans detection method of bean milling machine, which comprises
Zero point detection is carried out to the motor of bean milling machine in real time, and when determining the motor zero crossing, to the motor
Power samples are carried out, and sampled power is recorded according to sampled result；
When the sampling number to the motor is greater than frequency threshold value, had according to multiple sampled power calculating of record
Imitate power；
When determining the effective power less than power threshold, accumulation calculating is carried out according to default accumulated value, to obtain
Count value；
When the count value is greater than count threshold, the motor is closed.
Further, described after described the step of calculating effective power according to multiple sampled powers of record
Method further include:
Delete the sampled power of current record.
Further, described after described the step of calculating effective power according to multiple sampled powers of record
Method further include:
When determining the effective power no less than the power threshold, the count value is reset.
Further, described after described the step of calculating effective power according to multiple sampled powers of record
Method further include:
It, will be described when determining lasting number of the effective power no less than the power threshold greater than frequency threshold value
Count value is reset.
Further, described when determining the motor zero crossing, to the motor carry out power samples the step of
Include:
When determining the motor zero crossing, timing is carried out, to obtain timing time；
When the timing time is equal to time threshold, power samples are carried out to the motor.
Further, described the step of calculating effective power according to multiple sampled powers of record, includes:
Mean value calculation, median calculation or weight computing are carried out to multiple sampled powers, to obtain the Effective power
Rate.
The another object of the embodiment of the present invention is to provide a kind of bean milling machine and lacks beans detection system, the system comprises:
Power samples module carries out zero point detection for the motor in real time to bean milling machine, and works as and determine the motor mistake
When zero point, power samples are carried out to the motor, and sampled power is recorded according to sampled result；
Power computation module, for when the sampling number to the motor be greater than frequency threshold value when, according to the multiple of record
The sampled power calculates effective power；
Power judgment module, for when determining the effective power less than power threshold, according to default accumulated value into
Row accumulation calculating, to obtain count value；When the count value is greater than count threshold, the motor is closed.
The another object of the embodiment of the present invention is to provide a kind of bean milling machine, including storage equipment and processor, described
Storage equipment is for storing computer program, and the processor runs the computer program so that bean milling machine execution is above-mentioned
Bean milling machine lack beans detection method.
The another object of the embodiment of the present invention is to provide a kind of motor power detection circuit, comprising:
Control circuit is detected, is electrically connected including MCU, with the MCU rectifier being electrically connected and with the rectifier
Filter unit, the output end of the filter unit and motor be electrically connected, and the MCU is used to carry out power to the motor to adopt
Sample；
Switch control module, including triode and the relay being electrically connected with the triode, the triode and institute
MCU electric connection is stated, the relay and the motor are electrically connected, and the triode is used for the low and high level in the MCU
Under control, the switch of relay described in the switching control by or off state, so as to the switch state of the motor
It is controlled.
The another object of the embodiment of the present invention is to provide a kind of storage medium, and being stored in above-mentioned bean milling machine is made
Computer program, the computer program realize the step of above-mentioned bean milling machine lacks beans detection method when being executed by processor.
The embodiment of the present invention, by carrying out the design of power samples to the motor, to use the side based on power samples
Formula carries out the judgement that bean milling machine lacks beans detection, and then effectively raises scarce beans detection efficiency, without hall detector into
The scarce beans detection of row, reduces production cost, the design of zero point detection is carried out by the motor in real time to bean milling machine, be based on using
The mode of zero point detection triggers the power samples for motor, and then effectively raises the precision of motor power sampling.
Detailed description of the invention
Fig. 1 is the flow chart that the bean milling machine that first embodiment of the invention provides lacks beans detection method；
Fig. 2 is the flow chart that the bean milling machine that second embodiment of the invention provides lacks beans detection method；
Fig. 3 is the flow chart that the bean milling machine that third embodiment of the invention provides lacks beans detection method；
Fig. 4 is the flow chart that the bean milling machine that fourth embodiment of the invention provides lacks beans detection method；
Fig. 5 is the structural schematic diagram that the bean milling machine that fifth embodiment of the invention provides lacks beans detection system；
Fig. 6 is the structural schematic diagram for the motor power detection circuit that sixth embodiment of the invention provides；
Fig. 7 is the structural schematic diagram for the bean milling machine that seventh embodiment of the invention provides.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
Embodiment one
Referring to Fig. 1, being that the bean milling machine that first embodiment of the invention provides lacks the flow chart of beans detection method, including step
It is rapid:
Step S10 carries out zero point detection to the motor of bean milling machine in real time, and when determining the motor zero crossing, right
The motor carries out power samples, and records sampled power according to sampled result；
Wherein, the mode for carrying out zero-crossing examination to the motor can be with are as follows: carries out zero according to the first prefixed time interval
Point detection, it is preferred that in the step, when reaching preset time value after determining the motor zero crossing, executing to described
The power samples of motor, and the preset time value can be independently configured according to user demand, when this in the present embodiment is preset
Between value be 0.3ms, i.e., the 0.3ms after motor zero crossing executes power samples again, and then effectively raises sampling function
The accuracy of rate acquisition；Specifically, the mode of calculating current, voltage and resistance can be used in the step to carry out described adopt
The calculating of sample power；
Step S20, when the sampling number to the motor is greater than frequency threshold value, according to multiple sampling function of record
Rate calculates effective power；
Wherein, the frequency threshold value can be independently configured according to user demand, in the present embodiment, the frequency threshold value
It is 10 times, in the step, is judged by the size between the sampling number and the frequency threshold value, to determine presently described horse
The revolving speed reached whether stable state, when the motor is in stable state, then the fluctuation of power is smaller, power at this time reading
It is more accurate, specifically, the calculation of the effective power is mean value calculation, i.e., by calculating multiple institutes in the step
The average value of sampled power is stated, to obtain the effective power；
Step S30 carries out cumulative meter according to default accumulated value when determining the effective power less than power threshold
It calculates, to obtain count value；
Wherein, when the effective power is less than the power threshold, the weight bearing in bean milling machine is smaller at this time, described in judgement
Bean milling machine, which is in, lacks beans state, and in the step, which can independently carry out numerical value setting according to user demand, this
In embodiment, which is 1, i.e., when determining the effective power less than the power threshold, carries out numerical value 1
It is cumulative, to calculate the count value；
Step S40 closes the motor when the count value is greater than count threshold；
Wherein, numerical value judgement can be carried out between the count value and the count threshold by the way of comparator, when
When the count value is greater than the count threshold, then determine that the bean milling machine is to be in the beans state that lacks, and pass through and close institute in time
Motor is stated, to prevent damage caused by motor idle running for a long time；
In the present embodiment, by carrying out the design of power samples to the motor, in a manner of using based on power samples
It carries out bean milling machine and lacks the judgement of beans detection, and then effectively raise scarce beans detection efficiency, without hall detector progress
Beans detection is lacked, production cost is reduced, the design of zero point detection is carried out by the motor in real time to bean milling machine, using based on zero
The mode of point detection triggers the power samples for motor, and then effectively raises the precision of motor power sampling.
Embodiment two
Referring to Fig. 2, being that the bean milling machine that second embodiment of the invention provides lacks the flow chart of beans detection method, including step
It is rapid:
Step S11 carries out zero point detection to the motor of bean milling machine in real time, and when determining the motor zero crossing, into
Row timing, to obtain timing time；
Wherein, the mode for carrying out zero-crossing examination to the motor can be with are as follows: carries out zero according to the first prefixed time interval
Point detection, and in the step, timing is carried out by using the mode of timer；
Step S21 carries out power samples to the motor, and according to adopting when the timing time is equal to time threshold
Sample result records sampled power；
Step S31, when the sampling number to the motor be greater than frequency threshold value when, to record multiple sampled powers into
Row mean value calculation, median calculation or weight computing, to obtain the effective power；
Wherein, the frequency threshold value can be independently configured according to user demand, in the present embodiment, the frequency threshold value
It is 10 times, in the step, is judged by the size between the sampling number and the frequency threshold value, to determine presently described horse
The revolving speed reached whether stable state, when the motor is in stable state, then the fluctuation of power is smaller, power at this time reading
It is more accurate；
Step S41 carries out cumulative meter according to default accumulated value when determining the effective power less than power threshold
It calculates, to obtain count value；
Wherein, when the effective power is less than the power threshold, the weight bearing in bean milling machine is smaller at this time, described in judgement
Bean milling machine, which is in, lacks beans state, and in the step, which can independently carry out numerical value setting according to user demand, this
In embodiment, which is 1, i.e., when determining the effective power less than the power threshold, carries out numerical value 1
It is cumulative, to calculate the count value；
Step S51 resets the count value when determining the effective power no less than the power threshold；
Wherein, by the design for resetting the count value, to prevent from joined beans in scarce beans detection process as user
Detection mistake caused by material, therefore, count value described in the present embodiment is persistent value, i.e., the described effective power is continuously less than institute
State the number of power threshold；
Step S61 closes the motor when the count value is greater than count threshold；
Wherein, when determining number of the effective power continuously less than the power threshold greater than frequency threshold value, then
Determine that the bean milling machine is to be in the beans state that lacks, and pass through and close the motor in time, to prevent the motor from dallying for a long time
Caused damage；
In the present embodiment, by carrying out the design of power samples to the motor, in a manner of using based on power samples
It carries out bean milling machine and lacks the judgement of beans detection, and then effectively raise scarce beans detection efficiency, without hall detector progress
Beans detection is lacked, production cost is reduced, the design of zero point detection is carried out by the motor in real time to bean milling machine, using based on zero
The mode of point detection triggers the power samples for motor, and then effectively raises the precision of motor power sampling.
Embodiment three
Referring to Fig. 3, being that the bean milling machine that third embodiment of the invention provides lacks the flow chart of beans detection method, including step
It is rapid:
Step S12 carries out zero point detection to the motor of bean milling machine in real time, and when determining the motor zero crossing, into
Row timing, to obtain timing time；
Step S22 carries out power samples to the motor, and according to adopting when the timing time is equal to time threshold
Sample result records sampled power；
Step S32, when the sampling number to the motor be greater than frequency threshold value when, to record multiple sampled powers into
Row mean value calculation, median calculation or weight computing, to obtain the effective power；
Step S42 deletes the sampled power of current record；
Step S52 carries out cumulative meter according to default accumulated value when determining the effective power less than power threshold
It calculates, to obtain count value；
Step S62 is greater than frequency threshold value when determining lasting number of the effective power no less than the power threshold
When, the count value is reset；
Wherein, the present embodiment, by the judgement continued between number and the frequency threshold value, to determine whether to institute
It states count value to be zeroed out, and then effectively prevents when surprisingly the effective power being caused to be greater than the power threshold, to institute
The mistake for stating count value is reset；
Step S72 closes the motor when the count value is greater than count threshold；
In the present embodiment, by carrying out the design of power samples to the motor, in a manner of using based on power samples
It carries out bean milling machine and lacks the judgement of beans detection, and then effectively raise scarce beans detection efficiency, without hall detector progress
Beans detection is lacked, production cost is reduced, the design of zero point detection is carried out by the motor in real time to bean milling machine, using based on zero
The mode of point detection triggers the power samples for motor, and then effectively raises the precision of motor power sampling.
Example IV
Referring to Fig. 4, being that the bean milling machine that fourth embodiment of the invention provides lacks the flow chart of beans detection method, including step
It is rapid:
Step S13 carries out zero point detection to the motor of bean milling machine in real time, and when determining the motor zero crossing, into
Row timing, to obtain timing time；
Step S23 carries out power samples to the motor, and according to adopting when the timing time is equal to time threshold
Sample result records sampled power；
Step S33, when the sampling number to the motor be greater than frequency threshold value when, to record multiple sampled powers into
Row mean value calculation, median calculation or weight computing, to obtain the effective power；
Step S43 deletes the sampled power of current record；
Step S53 carries out cumulative meter according to default accumulated value when determining the effective power less than power threshold
It calculates, to obtain count value；
Step S63 adds up for the judgement number between the effective power and the power threshold, to be examined
Survey number；
Step S73 judges whether the count value is greater than counting when determining the detection number greater than detection threshold value
Threshold value；
When the judging result of step S73, which is, is, step S83 is executed；
The detection number and the count value are reset, and close the motor by step S83；
When the judging result of step S73 is no, step S93 is executed；
The detection number and the count value are reset, and return to step S13 by step S93；
In the present embodiment, by carrying out the design of power samples to the motor, in a manner of using based on power samples
It carries out bean milling machine and lacks the judgement of beans detection, and then effectively raise scarce beans detection efficiency, without hall detector progress
Beans detection is lacked, production cost is reduced, the design of zero point detection is carried out by the motor in real time to bean milling machine, using based on zero
The mode of point detection triggers the power samples for motor, and then effectively raises the precision of motor power sampling.
Embodiment five
Referring to Fig. 5, be that the bean milling machine that fifth embodiment of the invention provides lacks the structural schematic diagram of beans detection system 100,
The system comprises power samples module 10, power computation module 11 and power judgment modules 12, in which:
Power samples module 10 carries out zero point detection for the motor in real time to bean milling machine, and works as and determine the motor
When zero crossing, to the motor carry out power samples, and according to sampled result record sampled power, wherein to the motor into
The mode of row zero-crossing examination can be with are as follows: carries out zero point detection according to the first prefixed time interval, it is preferred that in the module, when
It determines when reaching preset time value after the motor zero crossing, is executing the power samples to the motor, and when this is default
Between value can be independently configured according to user demand, in the present embodiment the preset time value be 0.3ms, i.e., when the motor mistake
0.3ms after zero point executes power samples again, and then effectively raises the accuracy of sampled power acquisition；Specifically, the mould
In block, the mode of calculating current, voltage and resistance can be used to carry out the calculating of the sampled power.
Further, the power samples module 10 is also used to: when determining the motor zero crossing, timing is carried out,
To obtain timing time；When the timing time is equal to time threshold, power samples are carried out to the motor.
Power computation module 11, for when the sampling number to the motor be greater than frequency threshold value when, according to the more of record
A sampled power calculates effective power, wherein the frequency threshold value can be independently configured according to user demand, this reality
It applies in example, the frequency threshold value is 10 times, in the module, is sentenced by the size between the sampling number and the frequency threshold value
It is disconnected, with determine presently described motor revolving speed whether stable state, when the motor is in stable state, then the fluctuation of power
Smaller, power reading at this time is more accurate, specifically, the calculation of the effective power is average value meter in the module
It calculates, i.e., by calculating the average value of multiple sampled powers, to obtain the effective power.
Preferably, the power computation module 11 is also used to: deleting the sampled power of current record.
In the present embodiment, the power computation module 11 is also used to: to multiple sampled powers carry out mean value calculations,
Median calculation or weight computing, to obtain the effective power.
Power judgment module 12, for when determining the effective power less than power threshold, according to default accumulated value
Accumulation calculating is carried out, to obtain count value；When the count value is greater than count threshold, the motor is closed, wherein when described
When effective power is less than the power threshold, the weight bearing in bean milling machine is smaller at this time, determines that the bean milling machine is in and lacks beans state,
And in the module, which can independently carry out numerical value setting according to user demand, and in the present embodiment, this is default cumulative
Value is 1, i.e., when determining the effective power less than the power threshold, the cumulative of numerical value 1 is carried out, to calculate the counting
Value, can carry out numerical value judgement, when the count value by the way of comparator between the count value and the count threshold
When greater than the count threshold, then determine that the bean milling machine is to be in the beans state that lacks, and pass through and close the motor in time, to prevent
Only damage caused by motor idle running for a long time.
In the present embodiment, the power judgment module 12 is also used to: when determining the effective power no less than the function
When rate threshold value, the count value is reset.
Further, the power judgment module 12 is also used to: when determining the effective power no less than the function
When the lasting number of rate threshold value is greater than frequency threshold value, the count value is reset.
In the present embodiment, by carrying out the design of power samples to the motor, in a manner of using based on power samples
It carries out bean milling machine and lacks the judgement of beans detection, and then effectively raise scarce beans detection efficiency, without hall detector progress
Beans detection is lacked, production cost is reduced, the design of zero point detection is carried out by the motor in real time to bean milling machine, using based on zero
The mode of point detection triggers the power samples for motor, and then effectively raises the precision of motor power sampling.
Embodiment six
Referring to Fig. 6, being the structural schematic diagram for the motor power detection circuit that sixth embodiment of the invention provides, comprising:
Control circuit is detected, including MCU, electrical with the MCU rectifier T1 being electrically connected and with the rectifier T1
The filter unit of connection, the output end of the filter unit and motor M1 are electrically connected, the MCU be used for the motor M1 into
Row power samples.
Switch control module, including triode Q1 and the relay Y1 being electrically connected with the triode Q1, three pole
The pipe Q1 and MCU is electrically connected, and the relay Y1 and the motor M1 are electrically connected, and the triode Q1 is used for described
Under the low and high level control of MCU, the switch of relay Y1 described in the switching control by or off state, so as to described
The switch state of motor M1 is controlled.
Specifically, being connected between the MCU and the rectifier T1 in the present embodiment equipped with first resistor R1, the second electricity
It hinders in parallel equipped with first capacitor C1, the second capacitor C2 and adjustable resistor RL, institute on R2 and 3rd resistor R3, the rectifier T1
State on first capacitor C1 and the second capacitor C2 corresponding series connection be equipped with the first inductance L1, the second inductance L2, third inductance L3 and
It is in parallel on 4th inductance L4, the relay Y1 to be equipped with diode D1, the 4th electricity is equipped between the triode Q1 and the MCU
Hinder R4 and the 5th resistance R5.
In the present embodiment, in switch control module, the turn-on deadline of triode Q1 is controlled by the low and high level of MCU；From
And the switch of relay Y1 is controlled, the work of motor M1 is controlled, and in the power detection of motor M1, MCU is for detecting motor
The power of M1, in the present embodiment, motor M1 is d.c. motor, and alternating current (100-240V) is exported direct current by bridge rectifier
Electricity, while being filtered by capacitor and inductor for anti-EMC.
Embodiment seven
Referring to Fig. 7, being the structural schematic diagram for the bean milling machine 101 that seventh embodiment of the invention provides, including storage equipment
And processor, the storage equipment run the computer program so that institute for storing computer program, the processor
It states bean milling machine 101 and executes the scarce beans detection method of above-mentioned bean milling machine.
The present embodiment additionally provides a kind of storage medium, is stored thereon with computer journey used in above-mentioned bean milling machine
Sequence, the program when being executed, include the following steps:
Zero point detection is carried out to the motor of bean milling machine in real time, and when determining the motor zero crossing, to the motor
Power samples are carried out, and sampled power is recorded according to sampled result；
When the sampling number to the motor is greater than frequency threshold value, had according to multiple sampled power calculating of record
Imitate power；
When determining the effective power less than power threshold, accumulation calculating is carried out according to default accumulated value, to obtain
Count value；
When the count value is greater than count threshold, the motor is closed.The storage medium, such as: ROM/RAM, magnetic
Dish, CD etc..
It is apparent to those skilled in the art that for convenience and simplicity of description, only with above-mentioned each function
The division progress of unit, module can according to need and for example, in practical application by above-mentioned function distribution by different function
Energy unit or module are completed, i.e., the internal structure of storage device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit,
It can be each unit to physically exist alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.
Bean milling machine of the invention is lacked it will be understood by those skilled in the art that composed structure shown in Fig. 5 is not constituted
The restriction of beans detection system may include perhaps combining certain components or different portions than illustrating more or fewer components
Part arrangement, and the bean milling machine in Fig. 1-4 lacks beans detection method and also uses more or fewer components or group shown in Fig. 5
Certain components or different component layouts are closed to realize.The so-called unit of the present invention, module etc. refer to that one kind can be described
Bean milling machine lacks the series of computation machine that the performed simultaneously function of the processor (not shown) in beans detection system enough completes specific function
Program can be stored in the bean milling machine and lack in the storage equipment (not shown) of beans detection system.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of bean milling machine lacks beans detection method, which is characterized in that the described method includes:
Zero point detection is carried out to the motor of bean milling machine in real time, and when determining the motor zero crossing, the motor is carried out
Power samples, and sampled power is recorded according to sampled result；
When the sampling number to the motor is greater than frequency threshold value, Effective power is calculated according to multiple sampled powers of record
Rate；
When determining the effective power less than power threshold, accumulation calculating is carried out according to default accumulated value, to be counted
Value；
When the count value is greater than count threshold, the motor is closed.
2. bean milling machine as described in claim 1 lacks beans detection method, which is characterized in that described described to be adopted according to the multiple of record
After the step of sample power calculation effective power, the method also includes:
Delete the sampled power of current record.
3. bean milling machine as described in claim 1 lacks beans detection method, which is characterized in that described described to be adopted according to the multiple of record
After the step of sample power calculation effective power, the method also includes:
When determining the effective power no less than the power threshold, the count value is reset.
4. bean milling machine as described in claim 1 lacks beans detection method, which is characterized in that described described to be adopted according to the multiple of record
After the step of sample power calculation effective power, the method also includes:
When determining lasting number of the effective power no less than the power threshold greater than frequency threshold value, by the counting
Value is reset.
5. bean milling machine as described in claim 1 lacks beans detection method, which is characterized in that described to determine the motor zero passage
When point, include: to the step of motor progress power samples
When determining the motor zero crossing, timing is carried out, to obtain timing time；
When the timing time is equal to time threshold, power samples are carried out to the motor.
6. bean milling machine as described in claim 1 lacks beans detection method, which is characterized in that described described to be adopted according to the multiple of record
The step of sample power calculation effective power includes:
Mean value calculation, median calculation or weight computing are carried out to multiple sampled powers, to obtain the effective power.
7. a kind of bean milling machine lacks beans detection system, which is characterized in that the system comprises:
Power samples module carries out zero point detection for the motor in real time to bean milling machine, and works as and determine the motor zero crossing
When, power samples are carried out to the motor, and sampled power is recorded according to sampled result；
Power computation module, for when the sampling number to the motor is greater than frequency threshold value, according to the multiple described of record
Sampled power calculates effective power；
Power judgment module, for being carried out according to default accumulated value tired when determining the effective power less than power threshold
Add calculating, to obtain count value；When the count value is greater than count threshold, the motor is closed.
8. a kind of bean milling machine, which is characterized in that including storage equipment and processor, the storage equipment is for storing computer
Program, the processor runs the computer program so that the bean milling machine executes according to claim 1 to described in 6 any one
Bean milling machine lack beans detection method.
9. a kind of motor power detection circuit characterized by comprising
Control circuit is detected, including MCU, the filter with the MCU rectifier being electrically connected and with rectifier electric connection
Wave unit, the output end and motor of the filter unit are electrically connected, and the MCU is used to carry out power samples to the motor；
Switch control module, including triode and the relay being electrically connected with the triode, the triode and the MCU
It is electrically connected, the relay and the motor are electrically connected, and the triode is used to control in the low and high level of the MCU
Under, the switch of relay described in the switching control by or off state, so that the switch state to the motor carries out
Control.
10. a kind of storage medium, which is characterized in that it is stored with computer used in bean milling machine according to any one of claims 8
Program, the computer program realize that bean milling machine as claimed in any one of claims 1 to 6 lacks beans detection method when being executed by processor
The step of.
Priority Applications (1)
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