Dust particle size detection circuit applied to dust collector

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By detecting the size of dust particles through a combination of sensor circuits, the problem of high laser detection cost is solved, and the intelligence of the vacuum cleaner is achieved and the cost is reduced.

CN223449161UActive Publication Date: 2025-10-17SHENZHEN GAOKERUN ELECTRONICS CO LTD +1

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Patent Information

Application Number: CN202422655702.5
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-11-01
Publication Date: 2025-10-17
Estimated Expiration: 2034-11-01

AI Technical Summary

Technical Problem

The existing vacuum cleaner method of detecting the size of dust particles using lasers is relatively expensive and needs to be improved to reduce costs.

Method used

A combination circuit of a sensor power control module, a sensor transmitting and receiving module, a voltage follower module, a differential amplifier module and an MCU module is used to detect the size of dust particles and control the working power of the suction motor module through a PWM signal.

Benefits of technology

It achieves reliable detection of dust particle size, reduces costs, supports the intelligent functions of vacuum cleaners, and has obvious cost advantages.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model discloses a dust particle size detection circuit applied to a dust collector, and relates to the field of dust collectors, the dust particle size detection circuit applied to the dust collector comprises a sensor power supply control module used for controlling whether a sensor transmitting and receiving module works based on whether to receive a control signal of an MCU module; and the sensor transmitting and receiving module is used for converting an electric signal of the sensor transmitting module into an optical signal when the sensor transmitting and receiving module works, and the optical signal is converted into an electric signal again after reaching the sensor receiving module through dust. The intelligent dust collector has the advantages that the sensor transmitting and receiving module can effectively and reliably detect the size of dust particles, the size of the dust particles is fed back to the MCU module in cooperation with the voltage follower module and the differential amplification module, and the intelligent function of the dust collector is achieved; a peripheral circuit is very simple, and compared with laser dust locomotives in the market, the laser dust locomotive has a great cost advantage, and the cost can be reduced by at least more than one time.

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Description

TECHNICAL FIELD

[0001] The utility model relates to dust catcher field, concretely is a dust particle size detection circuit applied to dust catcher. BACKGROUND

[0002] With the continuous development of artificial intelligence technology, dust catcher will gradually realize intelligentization. At present, some dust catchers on the market identify dust particle size through laser detection mode, based on different sizes of dust particles, the dust catcher adopts different power work, ensures work efficiency, but the laser detection cost is higher, needs improvement. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a dust particle size detection circuit applied to dust catcher to solve the problems in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] A dust particle size detection circuit applied to dust catcher, comprising:

[0006] Sensor power control module is used for controlling whether sensor emission and reception module work based on whether receiving MCU module control signal;

[0007] Sensor emission and reception module is used for when working, the electric signal of sensor emission module is converted into optical signal through dust to reach sensor reception module again and become electric signal, and sensor reception module outputs electric signal to voltage follower module;

[0008] Voltage follower module is used for outputting received electric signal to differential amplification module;

[0009] Differential amplification module is used for amplifying input electric signal and outputting to MCU module;

[0010] MCU module is used for changing duty cycle of output PWM signal based on receiving peak value of amplified electric signal;

[0011] Suction motor module is used for controlling motor working power based on input PWM signal;

[0012] Sensor power control module connects sensor emission and reception module, sensor emission and reception module connects voltage follower module, voltage follower module connects differential amplification module, differential amplification module connects MCU module, and MCU module connects suction motor module and sensor power control module.

[0013] As a further scheme of the utility model: sensor power control module includes triode Q1, triode Q2, resistance R14, resistance R15, triode Q1's collector connects sensor emission and reception module, triode Q1's emitter connects resistance R15 one end, triode Q2's base, resistance R15 other end ground connection, triode Q2's emitter ground connection, triode Q1's base connects triode Q2's collector, resistance R14 one end, resistance R14 other end connects MCU module.

[0014] As a further scheme of the utility model: sensor emission and reception module includes connector CN1, connector CN2, photosensitive triode IR1, emitting diode IR2, connector CN1's first end ground connection, connector CN1's second end connects voltage follower module, connector CN1's third end, fourth end connects power supply voltage VCC, connector CN1's fifth end connects sensor power control module, connector CN1 and connector CN2 are connected, connector CN2's first end connects emitting diode IR2's negative pole, emitting diode IR2's positive pole connects resistance R12 one end, resistance R12 other end connects capacitor C7 one end, resistance R8 one end, capacitor C7 other end ground connection, resistance R8 other end connects connector CN2's second end, connector CN2's third end connects resistance R7 one end, resistance R7 other end connects resistance R5 one end, photosensitive triode IR1's collector, resistance R5 other end connects connector CN2's fourth end, connector CN2's fifth end connects photosensitive triode IR2's emitter.

[0015] As a further scheme of the utility model: voltage follower module includes amplifier IC3A, amplifier IC3A's noninverting terminal connects resistance R2 one end, resistance R4 one end, resistance R2 other end connects voltage VCC, resistance R4 other end connects sensor emission and reception module, amplifier IC3A's inverting terminal connects resistance R16 one end, amplifier IC3A's output terminal, differential amplification module, resistance R16 other end connects MCU module.

[0016] As a further scheme of the utility model: the differential amplification module includes the amplifier IC2B, the same phase end of the amplifier IC2B connects the one end of resistance R1, the one end of resistance R3, the other end of resistance R1 is grounded, the other end of resistance R3 connects the one end of resistance R9, the voltage follower module, the opposite phase end of the amplifier IC2B connects the one end of resistance R10, the one end of resistance R13, the one end of capacitor C9, the one end of capacitor C8, the one end of resistance R11, the other end of resistance R9, the other end of resistance R11 is grounded, the other end of capacitor C8 is grounded, the other end of resistance R13 connects voltage VCC, the output end of the amplifier IC2B connects the other end of resistance R10, the other end of capacitor C9, the one end of resistance R6, the other end of resistance R6 connects the one end of capacitor C6, MCU module, the other end of capacitor C6 is grounded.

[0017] Compared with the prior art, the utility model has the advantages that the sensor emission and reception module can effectively and reliably detect the dust particle size, and feedback to the MCU module in cooperation with the voltage follower module and the differential amplification module, to realize the intelligent function of the dust collector; the peripheral circuit is very simple, and has a very large cost advantage compared with the laser dust machine on the market, and can at least reduce the cost by more than 1 times. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a dust particle size detection circuit principle diagram applied to a dust collector.

[0019] Figure 2 It is a dust particle size detection circuit diagram applied to a dust collector.

[0020] Figure 3 It is an AD voltage amplitude and quantity diagram of different dust sizes and dust amounts. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0022] Please refer to Figure 1 A dust particle size detection circuit applied to a dust collector, comprising:

[0023] The sensor power supply control module is used for controlling whether the sensor emission and reception module works based on whether the control signal of the MCU module is received.

[0024] The sensor emission and receiving module is used for converting an electrical signal of the sensor emission module into an optical signal, transmitting the optical signal to the sensor receiving module, and converting the optical signal into an electrical signal again.

[0025] The voltage follower module is used for outputting the received electrical signal to the differential amplification module.

[0026] The differential amplification module is used for amplifying the input electrical signal and outputting the amplified electrical signal to the MCU module.

[0027] The MCU module is used for changing a duty cycle of an output PWM signal based on a peak value of the received amplified electrical signal.

[0028] The suction motor module is used for controlling a working power of the motor based on the input PWM signal.

[0029] The sensor emission and receiving module is connected to the sensor power supply control module, the sensor emission and receiving module is connected to the voltage follower module, the voltage follower module is connected to the differential amplification module, the differential amplification module is connected to the MCU module, and the MCU module is connected to the suction motor module and the sensor power supply control module.

[0030] In specific embodiments, please refer to Figure 2 DC_IN+ is a DC power positive input, DC_IN- is a DC power negative input, a stable DC voltage VCC is formed after the voltage stabilizer IC1, and is supplied to the subsequent circuit.

[0031] In the embodiment, please refer to Figure 2 The sensor power supply control module includes a triode Q1, a triode Q2, a resistor R14 and a resistor R15. The collector of the triode Q1 is connected to the sensor emission and receiving module. The emitter of the triode Q1 is connected to one end of the resistor R15 and the base of the triode Q2. The other end of the resistor R15 is grounded. The emitter of the triode Q2 is grounded. The base of the triode Q1 is connected to the collector of the triode Q2 and one end of the resistor R14. The other end of the resistor R14 is connected to the MCU module.

[0032] When the GPIO port of the MCU module outputs a high level, the triode Q1 is turned on, and then the triode Q2 is turned on. The triode Q1, the triode Q2 and the resistor R15 form an adjusting tube. The triode Q1 and the triode Q2 are turned on by mutual influence, so that the current flowing through the triode Q1 is fixed.

[0033] In the embodiment, please refer to Figure 2The sensor transmitting and receiving module comprises a connector CN1, a connector CN2, a phototransistor IR1, and a light emitting diode IR2. The first end of the connector CN1 is connected to the ground. The second end of the connector CN1 is connected to a voltage follower module. The third end and the fourth end of the connector CN1 are connected to a power supply voltage VCC. The fifth end of the connector CN1 is connected to a sensor power supply control module. The connector CN1 is connected to the connector CN2. The first end of the connector CN2 is connected to the negative electrode of the light emitting diode IR2. The positive electrode of the light emitting diode IR2 is connected to one end of a resistor R12. The other end of the resistor R12 is connected to one end of a capacitor C7 and one end of a resistor R8. The other end of the capacitor C7 is connected to the ground. The other end of the resistor R8 is connected to the second end of the connector CN2. The third end of the connector CN2 is connected to one end of a resistor R7. The other end of the resistor R7 is connected to one end of a resistor R5 and the collector of the phototransistor IR1. The other end of the resistor R5 is connected to the fourth end of the connector CN2. The fifth end of the connector CN2 is connected to the emitter of the phototransistor IR2.

[0034] When the transistors Q1 and Q2 are turned on, the voltage VCC, the fourth end of the interface CN1, the second end of the interface CN2, the resistor R8, the resistor R12, the light emitting diode IR2, the transistor Q1, the transistor Q2, and the common ground form a loop. The light emitting diode IR2 works in a light emitting mode. The current flowing through the transistor Q1 is fixed. The current flowing through the light emitting diode IR2 is fixed. That is, the light intensity of the light signal converted from the electric signal is fixed. The fixed light intensity is transmitted to the phototransistor IR1 through the dust. When the dust size or the dust amount is large, the phototransistor IR1 is turned on to a low degree. Conversely, when the dust size or the dust amount is small, the phototransistor IR1 is turned on to a high degree. Therefore, the electric signal of the fourth end of the interface CN2 (corresponding to the second end of the interface CN1) is different based on the dust size or the dust amount, and is fed back to the voltage follower module.

[0035] In the embodiment, please refer to Figure 2 The voltage follower module comprises an amplifier IC3A. The non-inverting terminal of the amplifier IC3A is connected to one end of a resistor R2 and one end of a resistor R4. The other end of the resistor R2 is connected to the voltage VCC. The other end of the resistor R4 is connected to the sensor transmitting and receiving module. The inverting terminal of the amplifier IC3A is connected to one end of a resistor R16, the output terminal of the amplifier IC3A, and a differential amplification module. The other end of the resistor R16 is connected to the MCU module.

[0036] The input electric signal is output to the differential amplification module after being amplified by the amplifier IC3A. If the AD voltage signal output to the MCU module through the resistor R16 is always high, it is judged that the sensor transmitting and receiving module is always blocked.

[0037] In the embodiment, please refer to Figure 2 and Figure 3The differential amplification module comprises an amplifier IC2B, one end of the non-inverting terminal of the amplifier IC2B is connected to one end of a resistor R1 and one end of a resistor R3, the other end of the resistor R1 is grounded, the other end of the resistor R3 is connected to one end of a resistor R9, a voltage follower module, one end of the inverting terminal of the amplifier IC2B is connected to one end of a resistor R10, one end of a resistor R13, one end of a capacitor C9, one end of a capacitor C8, one end of a resistor R11, the other end of the resistor R9, the other end of the resistor R11 is grounded, the other end of the capacitor C8 is grounded, the other end of the resistor R13 is connected to a voltage VCC, the output terminal of the amplifier IC2B is connected to the other end of the resistor R10, the other end of the capacitor C9, and one end of a resistor R6, the other end of the resistor R6 is connected to one end of a capacitor C6, an MCU module, and the other end of the capacitor C6 is grounded.

[0038] The amplified electrical signal is obtained after the electrical signal input into the differential amplification module is amplified, and is output to the MCU module. The dust resolution can be adjusted by changing the capacitance value of the capacitor C8.

[0039] The MCU module reads the output voltage of the amplifier IC2B and reads the single-pulse peak voltage to identify the dust size, and counts the number of different particulate matters according to the identified particle type. The MCU adjusts the power of the suction motor in the form of PWM based on the identified dust particle size and dust amount, to realize the power adjustment of the dust collector (the MCU identification signal and the corresponding processing are common functions of the MCU, and do not involve the innovation of the method).

[0040] The AD voltage amplitude and the number of different dust sizes and dust amounts are different, and the waveform is as shown in Figure 3 .

[0041] V1: the peak voltage is low, and the dust size is identified as, for example, pollen type dust;

[0042] V2: the peak voltage is slightly low, and the dust size is identified as, for example, baking soda;

[0043] V3: the peak voltage is moderate, and the dust size is identified as, for example, fine sand;

[0044] V4: the peak voltage is VCC, and the dust size is identified as, for example, oat paper type;

[0045] The dust amount is identified according to the number of waveforms meeting the conditions.

[0046] The working principle of the utility model is: sensor power control module is used for controlling whether sensor transmission and reception module works based on whether receiving MCU module's control signal;Sensor transmission and reception module is used for when working, sensor transmission module's electric signal is converted into optical signal and reaches sensor reception module again and becomes electric signal, sensor reception module outputs electric signal to voltage follower module;Voltage follower module is used for outputting received electric signal to differential amplification module;Differential amplification module is used for amplifying input electric signal and outputting to MCU module;MCU module is used for changing output PWM signal's duty ratio based on receiving amplified electric signal's peak value;Suction motor module is used for controlling motor working power based on input PWM signal.

[0047] It is obvious for those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model.

[0048] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A dust particle size detection circuit used in a vacuum cleaner, characterized in that: The dust particle size detection circuit used in the vacuum cleaner includes: The sensor power control module is used to control whether the sensor transmitting and receiving modules are working based on whether the control signal of the MCU module is received; The sensor transmitting and receiving module is used to convert the electrical signal of the sensor transmitting module into an optical signal when it is working. The optical signal passes through the dust and reaches the sensor receiving module, which is then converted into an electrical signal again. The sensor receiving module outputs the electrical signal to the voltage follower module. The voltage follower module is used to output the received electrical signal to the differential amplifier module; The differential amplifier module is used to amplify the input electrical signal and output it to the MCU module; The MCU module is used to change the duty cycle of the output PWM signal based on the peak value of the received amplified electrical signal; Suction motor module, used to control the motor working power based on the input PWM signal; The sensor power control module is connected to the sensor transmitting and receiving module, the sensor transmitting and receiving module is connected to the voltage follower module, the voltage follower module is connected to the differential amplifier module, the differential amplifier module is connected to the MCU module, and the MCU module is connected to the suction motor module and the sensor power control module.

2. The dust particle size detection circuit for a vacuum cleaner according to claim 1, characterized in that: The sensor power control module includes transistor Q1, transistor Q2, resistor R14, and resistor R15. The collector of transistor Q1 is connected to the sensor transmitting and receiving module, the emitter of transistor Q1 is connected to one end of resistor R15 and the base of transistor Q2, the other end of resistor R15 is grounded, the emitter of transistor Q2 is grounded, the base of transistor Q1 is connected to the collector of transistor Q2 and one end of resistor R14, and the other end of resistor R14 is connected to the MCU module.

3. The dust particle size detection circuit for use in a vacuum cleaner according to claim 1 or 2, characterized in that: The sensor transmitting and receiving module includes a connector CN1, a connector CN2, a phototransistor IR1, and a light-emitting diode IR2. The first end of the connector CN1 is grounded, the second end of the connector CN1 is connected to the voltage follower module, the third and fourth ends of the connector CN1 are connected to the power supply voltage VCC, and the fifth end of the connector CN1 is connected to the sensor power control module. The connector CN1 is connected to the connector CN2. The first end of the connector CN2 is connected to the cathode of the light-emitting diode IR2, the anode of the light-emitting diode IR2 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to one end of the capacitor C7 and one end of the resistor R8, the other end of the capacitor C7 is grounded, the other end of the resistor R8 is connected to the second end of the connector CN2, the third end of the connector CN2 is connected to one end of the resistor R7, the other end of the resistor R7 is connected to one end of the resistor R5 and the collector of the phototransistor IR1, the other end of the resistor R5 is connected to the fourth end of the connector CN2, and the fifth end of the connector CN2 is connected to the emitter of the phototransistor IR2.

4. The dust particle size detection circuit for a vacuum cleaner according to claim 1, characterized in that: The voltage follower module includes an amplifier IC3A. The non-inverting end of the amplifier IC3A is connected to one end of the resistor R2 and one end of the resistor R4. The other end of the resistor R2 is connected to the voltage VCC. The other end of the resistor R4 is connected to the sensor transmitting and receiving modules. The inverting end of the amplifier IC3A is connected to one end of the resistor R16, the output end of the amplifier IC3A, and the differential amplifier module. The other end of the resistor R16 is connected to the MCU module.

5. The dust particle size detection circuit for a vacuum cleaner according to claim 1, characterized in that: The differential amplifier module includes an amplifier IC2B, the non-inverting end of the amplifier IC2B is connected to one end of the resistor R1 and one end of the resistor R3, the other end of the resistor R1 is grounded, the other end of the resistor R3 is connected to one end of the resistor R9 and the voltage follower module, the inverting end of the amplifier IC2B is connected to one end of the resistor R10, one end of the resistor R13, one end of the capacitor C9, one end of the capacitor C8, one end of the resistor R11, the other end of the resistor R9, the other end of the resistor R11 is grounded, the other end of the capacitor C8 is grounded, the other end of the resistor R13 is connected to the voltage VCC, the output end of the amplifier IC2B is connected to the other end of the resistor R10, the other end of the capacitor C9, one end of the resistor R6, the other end of the resistor R6 is connected to one end of the capacitor C6 and the MCU module, and the other end of the capacitor C6 is grounded.