CN110254093B - Intelligent electric blackboard eraser, control system and control method thereof - Google Patents
Intelligent electric blackboard eraser, control system and control method thereof Download PDFInfo
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- CN110254093B CN110254093B CN201910550072.6A CN201910550072A CN110254093B CN 110254093 B CN110254093 B CN 110254093B CN 201910550072 A CN201910550072 A CN 201910550072A CN 110254093 B CN110254093 B CN 110254093B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
- B43L21/02—Blackboard or slate cleaning devices with means for absorbing the chalk dust
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
Abstract
The invention belongs to the technical field of blackboard or slate cleaning devices, and discloses an intelligent electric blackboard eraser, a control system and a control method thereof. The invention abandons the traditional dust wiping method of mechanical friction, and the permanent magnet motor drives the dust suction fan to rotate at high speed, thereby generating space negative pressure in a relatively closed space, effectively sucking dust, separating the dust from the blackboard, achieving the purposes of reducing the labor intensity of workers and enhancing the dust wiping effect, having the effects of automatic dust storage and no charging, avoiding the energy supplement from the outside, improving the use convenience, and simultaneously, the dust suction state can be observed and is convenient for timely treatment.
Description
Technical Field
The invention belongs to the technical field of blackboard or slate cleaning devices, and particularly relates to an intelligent electric blackboard eraser, a control system and a control method thereof.
Background
Currently, the current state of the art commonly used in the industry is such that:
the blackboard eraser is an important teaching tool, and the blackboard eraser directly influences the teaching quality and the teaching environment on the erasing of chalk writing and the treatment effect on dust. Because the teaching site is relatively closed and the personnel are relatively centralized, the dust has great harm to the health and safety of the personnel. Most of the traditional blackboard erasers do not treat dust in place, and part of the improved blackboard erasers need manual regular maintenance, so that the use is not convenient enough.
Most of the traditional blackboard erasers only use manpower to wipe dust by adopting a mechanical friction mode so as to separate the dust from a blackboard, and because the controllability is poor, the traditional blackboard erasers not only have poor dust wiping effect and low efficiency, but also are not beneficial to absorbing and processing the dust, the development of electric blackboard erasers with certain controllability gradually becomes a hotspot. Most of the existing improved electric blackboard erasers are inconvenient because internal storage batteries need to be replaced manually at regular intervals or electric energy needs to be supplemented through external chargers.
In summary, the problems of the prior art are as follows:
most of traditional blackboard erasers are not in place for dust treatment, the labor intensity of workers who need to consume is large, the dust removing effect is not good enough, the efficiency is low, the blackboard erasers are not beneficial to absorbing and treating dust, and part of improved blackboard erasers need manual regular maintenance and need regular manual replacement of internal storage batteries or supplement of electric energy through an external charger, so that the blackboard erasers are not convenient enough.
The difficulty of solving the technical problems is as follows:
how to effectively remove dust through other ways without changing the traditional wiping mode.
How to effectively store dust to reduce dust in an external space.
How to maintain the continuous operation of the device without human intervention.
The significance of solving the technical problems is as follows:
the dust removal device effectively removes dust through the high-speed rotating fan, and improves the dust removal effect, so that the teaching effect is indirectly improved.
According to the invention, the dust is stored through the fan and the filtering dust removal box, so that the dust amount in the external space is reduced, and the teaching environment is purified;
the invention can automatically charge the storage battery under certain conditions through the outer rotor type permanent magnet generator, thereby avoiding manually replacing the internal storage battery or supplementing electric energy through an external charger and improving the use convenience of the invention.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an intelligent electric blackboard eraser, a control system and a control method thereof.
The invention is realized in this way, an intelligent electric blackboard eraser control system, which comprises:
and the power generation unit is used for converting the mechanical friction horizontal motion between the blackboard eraser and the black board into the rotary motion of the rotor of the outer rotor type permanent magnet generator through the raised particles, generating a rotary magnetic field in the outer rotor type permanent magnet generator, cutting a static stator winding by the magnetic field, generating alternating current induced electromotive force, and providing electric energy for a load when the power generation unit is externally connected with the load.
And the electric unit is used for converting electric energy into rotary mechanical energy through the controlled permanent magnet brushless direct current motor, driving the coaxial dust collection fan to rotate at a high speed in a directional manner, and sucking dust into the dust storage box.
And the energy control unit converts the alternating current generated by the power generation unit into direct current through the controllable rectifying unit and supplies power to the load. Meanwhile, the energy circulation path is controlled by the electronic switch unit according to the dust wiping and storing requirements and the detection results of related parameters.
And the detection indicating unit is used for detecting the voltage after power generation and rectification, the voltage of the storage battery, the rotating speed of the generator rotor and the dust amount in the dust storage box, providing a basis for energy control and indicating the current running state through the LED lamp.
Furthermore, the energy control unit comprises a storage battery, a controllable rectifying unit, an electronic switch unit and a motor driving unit, wherein alternating current generated by the power generation unit is converted into direct current through the controllable rectifying unit, power is supplied to a load, and partial electric quantity is stored through the storage battery. Meanwhile, the energy circulation path is controlled by the electronic switch unit according to the dust wiping and storing requirements and the detection results of related parameters. The operation of the permanent magnet brushless DC motor of the electric unit is controlled by the motor driving unit.
Another object of the present invention is to provide an intelligent electric blackboard eraser control method of the intelligent electric blackboard eraser control system, wherein the intelligent electric blackboard eraser control method comprises:
converting mechanical friction horizontal motion between the blackboard eraser and the blackboard eraser into rotary motion of an outer rotor type permanent magnet generator rotor through protruding particles, generating a rotary magnetic field in a motor, cutting a static stator winding by the magnetic field, and generating alternating current induced electromotive force.
And step two, converting the generated alternating current into direct current by using the controllable rectifying unit, and supplying electric energy to related external loads of the LED indicator light, the dust collection fan and the filter.
And step three, detecting the voltage after power generation and rectification, the voltage of a storage battery, the rotating speed of a generator rotor and the dust amount in the dust storage box. And the energy circulation path is controlled by the electronic switch unit according to the dust wiping and storing requirements and the detection results of related parameters.
And fourthly, simultaneously, indicating the current running state of the blackboard eraser through an LED indicating lamp.
Further, in step four, the blackboard eraser operating state includes: a non-working state and a working state. The rotation speed of the rotor of the external rotor type permanent magnet generator is used as the basis for judging whether the external rotor type permanent magnet generator works, when the rotation speed is zero or very small, the blackboard eraser is defined to be in a non-working state, and a power-saving sleep mode is entered. Otherwise, the operation mode is set.
The power saving sleep mode includes: when the blackboard is in the power-saving dormant mode, the internal ECU is in the power-saving dormant state, the control switches K1, K2 and K3 are switched off, the controllable rectifier and the motor driver are switched off, the rotating speed detection function is switched on, and preparation is made for entering the working mode.
The working modes comprise: MCU constantly detects rectifier output voltage and battery voltage, drives LED pilot lamp according to the testing result.
Further, MCU constantly detects rectifier output voltage and battery voltage, according to in the testing result drive LED pilot lamp, specifically includes:
1) the generator simultaneously supplies power to the storage battery and the motor: the electric energy output by the outer rotor type permanent magnet generator passes through the controllable rectifier and then simultaneously supplies power to the storage battery and the motor, the storage battery is charged and the dust collection fan is driven to work, K1 and K3 are closed, K2 is opened, and the storage battery charging indicator lamp is turned on.
2) Generator only power to motor mode: the electric energy output by the outer rotor type permanent magnet generator only supplies power to the motor after passing through the controllable rectifier, the dust collection fan is driven to work, K3 is closed, K1 and K2 are disconnected, and the storage battery full-charge indicator lamp is lightened.
3) Battery-to-motor power supply mode: if the rotor of the outer rotor type permanent magnet generator has low rotating speed and low output voltage, the motor cannot be driven to work after controllable rectification, the storage battery supplies electric energy to the motor to drive the dust collection fan to work, K2 is closed, K1 and K3 are disconnected, and the storage battery discharge indicator lamp is turned on.
Another object of the present invention is to provide an electric blackboard eraser, which is provided with a housing, and an outer rotor type permanent magnet generator is installed in the housing.
The outer rotor type permanent magnet generator is connected with the controllable rectifier through a lead.
The controllable rectifier is connected with the motor driver and the storage battery through the switch group.
The motor driver is connected with the permanent magnet brushless direct current motor through a lead.
The permanent magnet brushless direct current motor is connected with the dust collection fan through a rotor.
The MCU chip is connected with the LED indicator lamp through a plate line.
Further, dust is adsorbed by the dust collection fan and is stored in the filter dust storage box, and a dust storage sensing switch of the filter dust storage box is connected with the MCU chip (with the model of STM32F103ZE) through a lead.
Further, the motor driver is connected to the battery through K2 of the switch group. The motor drive is connected to the rectifier via the switch block K3. .
In summary, the advantages and positive effects of the invention are:
the invention aims at dust pollution, combines the electromechanical technology, adopts the permanent magnet generator and the storage battery as a primary power supply, drives the high-speed rotating dust collection fan, thereby achieving the purposes of dust removal and teaching environment purification, realizing education safety, simultaneously, the invention does not need to replace batteries or externally charge, automatically realizes the conversion of electromechanical energy and the supplement of electric energy in the process of wiping the blackboard by internal control, and improves the convenience and the intelligence of the operation.
The invention converts the horizontal friction movement of the blackboard eraser on the blackboard into the rotation movement of a rotor of a permanent magnet generator, generates electric energy under the action of electromagnetic induction, charges a storage battery for storing energy on one hand, supplies power to a permanent magnet direct current motor on the other hand, drives a dust suction fan to rotate at high speed, sucks air containing dust to a dust storage box under the action of directional airflow, and discharges clean dust-free air at an air outlet after filtration, thereby not only improving the dust wiping efficiency on the blackboard, but also recovering the dust and facilitating the control and management of electromechanical energy. In addition, the current state can be indicated on the shell through a visible indicator light, so that observation is facilitated, and a user can take measures in time.
The invention also has the following advantages:
1) high-efficiency dust wiping.
The traditional mechanical friction dust wiping method is abandoned, and the permanent magnet motor drives the dust suction fan to rotate at a high speed, so that space negative pressure is generated in a relatively closed space, dust is effectively sucked, the dust is separated from the blackboard, and the purposes of reducing the labor intensity and enhancing the dust wiping effect are achieved.
2) And (5) automatically storing dust.
The directional air flow is generated by the controlled high-speed rotating fan, dust separated from the blackboard can be sucked into the dust storage box in a directional mode, so that the dust can be prevented from flying, manual participation is not needed in the process, and automatic dust storage is achieved.
3) Charging is avoided.
The energy-saving permanent magnet motor is integrated with a time-delay automatic power-off function, so that the energy consumption is low, the energy is not required to be supplemented externally, and the use convenience is improved.
4) The state can be observed, and the processing is convenient in time.
Through detection and visual instruction to relevant parameter, the user can in time know the state of blackboard eraser to in time adopt the measure to handle, if when inside battery short of electricity instructed, the mode of blackboard is cleaned fast to the accessible charges, and when inside dust storage box was full, in time the suggestion user emptys the dust.
With the continuous development of the electromechanical technology and the automation technology, the invention realizes the automatic conversion and storage of electromechanical energy by the devices such as the motor, the storage battery, the generator and the like through controlling related power electronic devices, thereby providing feasibility for the intelligent dust removal and dust storage of the blackboard eraser.
Drawings
Fig. 1 is a schematic view of an intelligent electric blackboard eraser provided by an embodiment of the invention.
In the figure: 1. and a power generation unit. 2. An electric unit. 3. An energy control unit. 4. And detecting an indicating unit.
Fig. 2 is a schematic view of an intelligent electric blackboard eraser provided by an embodiment of the invention.
Fig. 3 is a schematic diagram of a power generation link of the intelligent electric blackboard eraser provided by the embodiment of the invention.
Fig. 4 is a flowchart of a control method of the intelligent electric blackboard eraser according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Most of traditional blackboard erasers do not treat dust in place, not only are the dust-removing effects not good enough, the efficiency is low, but also the absorption treatment of dust is not facilitated, and the blackboard erasers of partial improved generation need manual regular maintenance, and need regular manual replacement of internal storage batteries or supplement of electric energy through an external charger, and are not convenient enough.
In order to solve the problems in the prior art, the invention provides an intelligent electric blackboard eraser and a control method thereof, and the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, an intelligent electric blackboard eraser provided in an embodiment of the present invention specifically includes:
the power generation unit 1: the device is used for converting mechanical friction horizontal motion between the blackboard eraser and the blackboard eraser into rotary motion of a rotor of an outer rotor type permanent magnet generator through protruding particles, generating a rotary magnetic field in a motor, enabling a static stator winding to be cut by the magnetic field, generating alternating current induced electromotive force, and providing electric energy for a load when the load is externally connected.
The electric unit 2: the dust collection box is used for converting electric energy into rotary mechanical energy through the controlled permanent magnet brushless direct current motor, driving the coaxial dust collection fan to rotate at a high speed in a directional mode, and sucking dust into the dust storage box.
The energy control unit 3: the power generation device comprises a storage battery and each power unit, and converts alternating current generated by a power generation unit into direct current through a controllable rectifying unit to supply power to a load. Meanwhile, the energy circulation path is controlled by the electronic switch unit according to the dust wiping and storing requirements and the detection results of related parameters.
The detection instruction unit 4: the device is used for detecting the voltage after power generation and rectification, the voltage of a storage battery, the rotating speed of a generator rotor and the dust amount in a dust storage box, provides a basis for energy control, and simultaneously indicates the current running state through an LED lamp.
Fig. 2 is an intelligent electric blackboard eraser provided with a housing, in which an outer rotor type permanent magnet generator is installed.
The outer rotor type permanent magnet generator is connected with the controllable rectifier through a lead.
The controllable rectifier is connected with the motor driver and the storage battery through the switch group.
The motor driver is connected with the permanent magnet brushless direct current motor through a lead.
The permanent magnet brushless direct current motor is connected with the dust collection fan through a rotor.
The MCU chip is connected with the LED indicator lamp through a plate line.
Further, dust is adsorbed by the dust collection fan and is stored in the filter dust storage box, and a dust storage switch of the filter dust storage box is connected with the MCU chip (model number STM32F103ZE) through a lead.
Further, the motor driver is connected to the battery through K2 of the switch group. The motor drive is connected to the rectifier via the switch block K3.
As shown in fig. 3, the power generation unit provided in the embodiment of the present invention specifically includes:
when a user wipes a blackboard, the mechanical friction horizontal motion between the blackboard eraser and the blackboard is converted into the rotary motion of the rotor of the outer rotor type permanent magnet generator through the raised particles, a rotary magnetic field is generated in the motor, so that a static stator winding of the motor is cut by the magnetic field, alternating current induced electromotive force is generated, and when the motor is externally connected with a load, electric energy is provided for the load.
As shown in fig. 4, the intelligent blackboard eraser control method provided in the embodiment of the present invention specifically includes:
s101, a user wipes a blackboard, mechanical friction horizontal movement between the blackboard eraser and the blackboard eraser is converted into rotary movement of an outer rotor type permanent magnet generator rotor through protruding particles, a rotary magnetic field is generated in a motor, a static stator winding is cut by the magnetic field, and alternating current induced electromotive force is generated.
And S102, converting the generated alternating current into direct current by using the controllable rectifying unit, and supplying electric energy to related external loads of the LED indicator light, the dust collection fan and the filter.
And S103, detecting the voltage after power generation and rectification, the voltage of a storage battery, the rotating speed of a generator rotor and the dust amount in the dust storage box. And the energy circulation path is controlled by the electronic switch unit according to the dust wiping and storing requirements and the detection results of related parameters.
And S104, simultaneously, the current running state of the blackboard is indicated through the LED lamp, so that a user can conveniently take appropriate measures to process.
In step S104, the blackboard operating state provided in the embodiment of the present invention specifically includes:
the blackboard running state comprises a non-working state and a working state. The rotating speed of the generator rotor is taken as the basis for whether the generator rotor works, when the rotating speed is zero or very small, the generator rotor is defined to be in a non-working state, and a power-saving sleep mode is entered. Otherwise, the operation mode is set.
The power saving sleep mode: when the blackboard is in the power-saving dormant mode, the internal ECU is in the power-saving dormant state, the control switches K1, K2 and K3 are switched off, the rectifier, the motor controller and other peripheral devices are driven to be switched off, and the rotating speed detection function is switched on to prepare for entering the working mode.
The working mode is as follows: the ECU is awakened, the output voltage of the rectifier and the voltage of the storage battery are continuously detected, and the method comprises the following three steps of:
1) the generator simultaneously supplies power to the storage battery and the motor: the generator rotor has high rotating speed, so that the output voltage is high, the detection voltage of the storage battery is low at the moment, the storage battery is in a power shortage state, in order to prevent the storage battery from being over-discharged, the electric energy output by the generator simultaneously supplies power to the storage battery and the motor after passing through the controllable rectifier, so that the storage battery is charged and the dust collection fan is driven to work, therefore, K1 and K3 are closed, K2 is disconnected, and the storage battery charging indicator lamp is turned on.
2) Generator only power to motor mode: the high rotational speed of the generator rotor leads to the output voltage to be higher, and the voltage of the storage battery is higher at this moment, and is in the full charge state, in order to prevent the overcharge of the storage battery, the electric energy that the generator outputs only supplies power to the electric motor after passing through the controllable rectifier, drive the dust absorption fan to work, so K3 is closed, K1, K2 are disconnected, and the full charge indicator lamp of the storage battery.
3) Battery-to-motor power supply mode: the lower output voltage that leads to of generator rotor rotational speed is lower, is not enough to drive the motor work after controllable rectification, and the battery energy storage is more this moment, then provides the electric energy to the motor by the battery, drives dust absorption fan work, so K2 is closed, K1, K3 disconnection, and the battery discharge pilot lamp lights.
The invention is further described below in connection with specific applications.
In order to be used conveniently, the intelligent blackboard eraser is not provided with a manual operation switch or button, the rotating speed of the rotor of the generator is used as the basis for judging whether the intelligent blackboard eraser works or not, namely when the rotating speed is zero or very small, the intelligent blackboard eraser is defined to be in a non-working state, and enters a power-saving sleep mode. Otherwise, the operation mode is set.
In the power-saving sleep mode, the internal ECU is in a power-saving sleep state, the control switches K1, K2 and K3 are turned off, the rectifier, the motor controller and other external drives are turned off, the power consumption is saved, but the rotation speed detection function needs to be reserved to prepare for entering the working mode.
In the working mode, the ECU is awakened, the output voltage of the rectifier and the voltage of the storage battery are continuously detected, and the following three working modes are distinguished according to the detection result:
1) the generator simultaneously supplies power to the storage battery and the motor: at the moment, the output voltage of the generator rotor is higher due to the fact that the rotating speed of the generator rotor is higher, the detection voltage of the storage battery is lower at the moment, the generator rotor is in a power-deficient state, in order to prevent the storage battery from being over-discharged, the electric energy output by the generator simultaneously supplies power to the storage battery and the motor after passing through the controllable rectifier, so that the storage battery is charged and the dust collection fan is driven to work, therefore, K1 and K3 are closed, K2 is opened, and the storage battery charging indicator lamp is turned on.
2) Generator only power to motor mode: at the moment, the rotor of the generator has high rotation speed to result in high output voltage, the storage battery has high voltage and is in a full-charge state, in order to prevent the storage battery from being overcharged, the electric energy output by the generator only supplies power to the motor after passing through the controllable rectifier to drive the dust suction fan to work, so that K3 is closed, K1 and K2 are opened, and the storage battery is in a full-charge state.
3) Battery-to-motor power supply mode: at the moment, the output voltage is low due to the fact that the rotating speed of the rotor of the generator is low, the motor cannot be driven to work after controllable rectification, the storage battery stores more energy, the storage battery provides electric energy for the motor to drive the dust collection fan to work, so that K2 is closed, K1 and K3 are opened, and the storage battery discharge indicator lamp is turned on.
Based on the above analysis of the working modes, when the storage battery is in power shortage, the power shortage indicator lamp is turned on, and a user can automatically charge the storage battery by improving the blackboard erasing speed, so that the storage battery is prevented from being over-discharged. When the accumulator is full, it can automatically cut off the charging circuit to prevent the accumulator from over-charging. Therefore, the intelligent charging and protection can be realized.
In addition, when detecting that the dust in the dust storage box is full, can send LED instruction automatically to the user clears away the dust of inside in time, in order to guarantee the convenience of using.
The technical solution and technical effects of the present invention are further described below with reference to specific embodiments.
Example 1
The intelligent electric blackboard eraser needs to complete the functions of electric dust erasing, dust storage, automatic internal energy management and the like, and mainly comprises a power generation unit, an electric unit, an energy management unit and a detection indication unit.
A power generation unit: when a user wipes a blackboard, the mechanical friction horizontal motion between the blackboard eraser and the blackboard eraser is converted into the rotary motion of the rotor of the outer rotor type permanent magnet generator through the raised particles, a rotary magnetic field is generated in the motor, the static stator winding of the motor is cut by the magnetic field, alternating current induced electromotive force is generated, and when the motor is externally connected with a load, electric energy is supplied to the load (as shown in figure 1).
An electric unit: the electric energy is converted into rotary mechanical energy through the controlled permanent magnet brushless direct current motor, and the coaxial dust collection fan is driven to rotate at a high speed in a directional mode, so that dust is sucked into the dust storage box.
An energy management unit: the system comprises a storage battery and power modules, wherein the power modules convert alternating current generated by a power generation unit into direct current through a controllable rectifying unit so as to supply power to a load. Meanwhile, in order to prevent the storage battery from being overcharged and overdischarged, the energy circulation path is controlled by the electronic switch unit according to the dust wiping and storing requirements and the detection results of related parameters.
A detection and indication unit: the voltage after power generation and rectification, the voltage of a storage battery, the rotating speed of a rotor of the generator and the dust amount in the dust storage box are detected, a basis is provided for energy control, and meanwhile, the indication is carried out through an LED lamp, so that a user can know the current running state, and a proper measure can be conveniently taken for processing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides an electronic blackboard eraser control system of intelligence which characterized in that, electronic blackboard eraser control system of intelligence includes:
the power generation unit is used for converting mechanical friction horizontal motion between the blackboard eraser and the black board into rotary motion of the rotor of the outer rotor type permanent magnet generator through the raised particles, generating a rotary magnetic field in the outer rotor type permanent magnet generator, cutting a static stator winding by the magnetic field, generating alternating current induced electromotive force, and providing electric energy for a load when the power generation unit is externally connected with the load;
the electric unit is used for converting electric energy into rotary mechanical energy through the controlled permanent magnet brushless direct current motor, driving the coaxial dust collection fan to rotate at a high speed in a directional mode, and sucking dust into the dust storage box;
the detection indicating unit is used for detecting the voltage after power generation and rectification, the voltage of a storage battery, the rotating speed of a generator rotor and the dust amount in the dust storage box, providing a basis for energy control and indicating the current running state through an LED lamp;
the energy control unit comprises a storage battery, a controllable rectifier, an electronic switch unit and a motor driving unit, wherein alternating current generated by the power generation unit is converted into direct current through the controllable rectifier, power is supplied to a load, and partial electric quantity is stored through the storage battery; meanwhile, the energy circulation path is controlled by the electronic switch unit according to the dust wiping and storing requirements and the detection results of related parameters; controlling the operation of a permanent magnet brushless direct current motor of the electric unit through a motor driving unit;
the intelligent blackboard eraser control method comprises the following steps:
converting mechanical friction horizontal motion between a blackboard eraser and a blackboard eraser into rotary motion of an outer rotor type permanent magnet generator rotor through protruding particles, generating a rotary magnetic field in a motor, cutting a static stator winding by the magnetic field, and generating alternating current induced electromotive force;
converting the generated alternating current into direct current by using a controllable rectifier, and providing electric energy for related external loads of an LED indicator light, a dust collection fan and a filter;
detecting the voltage after power generation and rectification, the voltage of a storage battery, the rotating speed of a generator rotor and the dust amount in a dust storage box; and the energy circulation path is controlled by the electronic switch unit according to the dust wiping and storing requirements and the detection results of related parameters;
and fourthly, simultaneously, indicating the current running state of the blackboard eraser through an LED indicating lamp.
2. The intelligent electric blackboard eraser control system according to claim 1, wherein in step four, the blackboard eraser operating state includes: a non-working state and a working state; the rotation speed of the rotor of the external rotor type permanent magnet generator is used as the basis for judging whether the external rotor type permanent magnet generator works, when the rotation speed is zero or very small, the blackboard eraser is defined to be in a non-working state, and a power-saving sleep mode is entered; otherwise, the working mode is set;
the power saving sleep mode includes: when the blackboard is in a power-saving dormant mode, the internal ECU is in the power-saving dormant state, the control switches K1, K2 and K3 are switched off, the controllable rectifier and the motor driver are switched off, the rotating speed detection function is switched on, and preparation is made for entering a working mode;
the working modes comprise: MCU constantly detects rectifier output voltage and battery voltage, drives LED pilot lamp according to the testing result.
3. The intelligent electric blackboard eraser control system according to claim 1, wherein the MCU continuously detects the rectifier output voltage and the battery voltage, and drives the LED indicator according to the detection result, which specifically comprises:
1) the generator simultaneously supplies power to the storage battery and the motor: the electric energy output by the outer rotor type permanent magnet generator passes through the controllable rectifier and then simultaneously supplies power to the storage battery and the motor, the storage battery is charged and the dust collection fan is driven to work, K1 and K3 are closed, K2 is opened, and the storage battery charging indicator lamp is turned on;
2) generator only power to motor mode: the electric energy output by the outer rotor type permanent magnet generator only supplies power to the motor after passing through the controllable rectifier, so as to drive the dust collection fan to work, K3 is closed, K1 and K2 are disconnected, and the full-charge indicator lamp of the storage battery is lightened;
3) battery-to-motor power supply mode: if the rotor of the outer rotor type permanent magnet generator has low rotating speed and low output voltage, the motor cannot be driven to work after controllable rectification, the storage battery supplies electric energy to the motor to drive the dust collection fan to work, K2 is closed, K1 and K3 are disconnected, and the storage battery discharge indicator lamp is turned on.
4. An intelligent electric blackboard eraser carrying the control system of claim 1, provided with a housing, characterized in that an outer rotor type permanent magnet generator is installed in the housing;
the outer rotor type permanent magnet generator is connected with the controllable rectifier through a lead;
the controllable rectifier is connected with the motor driver and the storage battery through the switch group;
the motor driver is connected with the permanent magnet brushless direct current motor through a lead;
the permanent magnet brushless direct current motor is connected with the dust collection fan through a rotor;
the MCU chip is connected with the LED indicator lamp through a plate line.
5. The intelligent electric blackboard eraser as claimed in claim 4, wherein the dust collection fan adsorbs dust to be stored in the filter dust storage box, and a dust storage sensor switch of the filter dust storage box is connected with the MCU chip through a wire.
6. The intelligent electric blackboard eraser according to claim 4, wherein the motor driver is connected to the storage battery through K2 of the switch group; the motor drive is connected to the controllable rectifier via the K3 of the switch bank.
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| CN201833779U (en) * | 2010-10-11 | 2011-05-18 | 山东科技大学 | Blackboard eraser for dust absorption manually |
| CN202106767U (en) * | 2010-12-23 | 2012-01-11 | 山东理工大学 | Manual charging dust-absorbing blackboard eraser |
| CN202550643U (en) * | 2012-04-05 | 2012-11-21 | 华北电力大学 | Electric energy management device of perpendicular shaft wind power generation system |
| CN104908494A (en) * | 2014-03-12 | 2015-09-16 | 南京化工职业技术学院 | Self-generating electricity dust collection blackboard eraser |
| CN203937415U (en) * | 2014-07-19 | 2014-11-12 | 南京化工职业技术学院 | A kind of self power generation dust absorption blackboard eraser |
| CN105252942A (en) * | 2014-07-19 | 2016-01-20 | 南京化工职业技术学院 | Spontaneous electric dust collecting blackboard eraser |
| CN106956539A (en) * | 2016-01-11 | 2017-07-18 | 王驭陌 | A kind of self-power generation type negative pressure absorbent blackboard eraser |
| CN206461362U (en) * | 2017-02-28 | 2017-09-01 | 孙晓飞 | A kind of exercycle generating suppling device |
| CN108944199A (en) * | 2018-08-27 | 2018-12-07 | 华北水利水电大学 | Electrostatic dedusting eraser |
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