CN218122101U - Detection circuit for identifying type of ground brush - Google Patents

Abstract

The utility model discloses a detection circuitry of discernment scrubbing brush type. The circuit comprises a protection circuit, a pulse generation circuit, a charge and discharge circuit and a singlechip; the protection circuit is connected with the pulse generation circuit and the charging and discharging circuit, and the pulse generation circuit is connected with the single chip microcomputer; the pulse generating circuit comprises a first resistor, a first detection end, a second detection end, a first capacitor and a waveform generating chip; the first detection end and the second detection end are used for being connected with a ground brush, and the pulse generation circuit is used for generating square waves and sending the square waves to the single chip microcomputer; the charge and discharge circuit comprises a third resistor, a fourth resistor, a first diode, a third capacitor and a triode; the charging and discharging circuit is used for closing the pulse generating circuit after the preset duration; and a third pin of the waveform generation chip is connected with the single chip microcomputer, and the single chip microcomputer compares the received square wave with a preset square wave and determines the type of the floor brush. The utility model discloses can detect out the scrubbing brush type, adopt different mode according to the different grade type, improve user's use and experience and satisfaction.

Description

Detection circuit for identifying type of ground brush

Technical Field

The embodiment of the utility model provides a relate to the clean technical field of dust catcher, especially relate to a detection circuitry of discernment scrubbing brush type.

Background

In order to meet different cleaning requirements of users, the existing dust collector is often matched with various types of electric floor brushes, such as a mattress brush, a sofa brush, a floor brush, a carpet brush, a mite removing brush or a filter element cleaning brush and the like. Different types of modes of operation of the floor brush. Therefore, when the dust collector is used, the type of the floor brush needs to be identified in advance, most dust collectors on the market do not have the floor brush detection function, and when a user replaces the floor brush, the user cannot judge the type of the floor brush, and different working modes cannot be implemented. The user experience is poor, and the user satisfaction is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a detection circuitry of discernment scrubbing brush type can detect the type of scrubbing brush, according to the scrubbing brush type of difference, adopts different mode to improve user's use and experience, increase the product satisfaction.

According to the utility model discloses an aspect provides a detection circuitry of discernment scrubbing brush type, and this circuit includes: the protection circuit, the pulse generation circuit, the charge and discharge circuit and the singlechip are connected;

the protection circuit is respectively connected with the pulse generation circuit and the charging and discharging circuit, and the pulse generation circuit is connected with the singlechip;

the pulse generating circuit includes: the device comprises a first resistor, a first detection end, a second detection end, a first capacitor and a waveform generation chip; a first end of the first resistor is connected with an output end of the protection circuit, a second end of the first resistor is connected with a seventh pin of the waveform generation chip after being connected with the first detection end, a second detection end is connected with a sixth pin and a second pin of the waveform generation chip after being connected with a first end of the first capacitor, and a second end of the first capacitor is grounded; the first detection end and the second detection end are used for being connected with a ground brush, and the pulse generation circuit is used for generating square waves and sending the square waves to the single chip microcomputer;

the charge and discharge circuit includes: the first resistor, the second resistor, the third capacitor and the triode are connected in series; the first end of the third resistor is connected with the output end of the protection circuit, the second end of the third resistor is respectively connected with the first end of the fourth resistor and the first end of the third capacitor, and the second end of the third capacitor is grounded; a second end of the fourth resistor is respectively connected with a negative electrode of the first diode and a base electrode of the triode, an anode of the first diode is connected with an emitting electrode of the triode and then grounded, and a collector of the triode is connected with the second detection end; the charging and discharging circuit is used for closing the pulse generating circuit after a preset time length;

and a third pin of the waveform generating chip is connected with the single chip microcomputer, and the single chip microcomputer compares the received square wave with a preset square wave and determines the type of the floor brush.

Optionally, the protection circuit comprises: the circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a second capacitor and a second diode;

a first end of the fifth resistor is connected with a VCC interface, a second end of the fifth resistor is connected with a first end of the sixth resistor, a second end of the sixth resistor is connected with a first end of the seventh resistor, a second end of the seventh resistor is connected with a first end of the eighth resistor, a second end of the eighth resistor is respectively connected with a first end of the second capacitor and a cathode of the second diode, and a second end of the second capacitor is connected with an anode of the second diode and then grounded; and the first end of the second capacitor and the cathode of the second diode are output ends of the protection circuit.

Optionally, the detection circuit for identifying the type of the floor brush further comprises: a ninth resistor, a fourth capacitor, a fifth capacitor and a tenth resistor;

a first end of the ninth resistor is connected with a second end of the third resistor after being connected with a first end of the third capacitor, and a second end of the ninth resistor is connected with a second end of the third capacitor and then grounded;

the first end of the fourth capacitor is connected with the fifth pin of the waveform generation chip, and the second end of the fourth capacitor is connected with the first pin of the waveform generation chip and then grounded;

the first end of the fifth capacitor is connected with the first resistor, and the second end of the fifth capacitor is grounded;

and the first end of the tenth resistor is connected with the eighth pin of the waveform generation chip, and the second end of the tenth resistor is connected with the third pin of the waveform generation chip.

Optionally, the first diode is a transient suppression diode, and the second diode is a transient suppression diode.

Optionally, the transistor is an NPN transistor.

Optionally, the detection circuit for identifying the type of brush further comprises a system power supply and EMC circuit comprising: the circuit comprises a first interface, a sixth capacitor, a seventh capacitor, an eleventh resistor, a twelfth resistor, a transformer, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor and a third diode;

a first pin of the first interface is connected to first ends of the sixth capacitor, the seventh capacitor, the eighth capacitor, the ninth capacitor, the tenth capacitor, the eleventh capacitor, the twelfth capacitor, and a negative electrode of the third diode, respectively;

a fourth pin of the first interface is connected to second ends of the sixth capacitor, the seventh capacitor, the eighth capacitor, the ninth capacitor, the tenth capacitor, the eleventh capacitor, the twelfth capacitor, and an anode of the third diode, respectively;

the first winding of the transformer is connected with the eleventh resistor in parallel, and the second winding of the transformer is connected with the twelfth resistor in parallel.

Optionally, the detection circuit for identifying the type of the ground brush further comprises an interference cancellation circuit, the interference cancellation circuit comprising: a thirteenth resistor, a fourteenth resistor, a thirteenth capacitor and a fourth diode;

the first end of the thirteenth resistor and the first end of the fourteenth resistor are connected with a third pin of the first interface, the second end of the thirteenth resistor, the anode of the fourth diode and the second end of the thirteenth capacitor are connected and then grounded, the second end of the fourteenth resistor, the cathode of the fourth diode and the first end of the thirteenth capacitor are connected, and the first end of the thirteenth capacitor is connected with the single chip microcomputer.

Optionally, the detection circuit for identifying the type of the floor brush further includes an illumination constant current source circuit including: the driving circuit comprises a second interface, a third interface, a driving chip, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a fifteenth resistor, a twentieth capacitor, a sixteenth resistor, a seventeenth resistor, an inductor, a twenty-first capacitor, a twenty-second capacitor, a fifth diode and a sixth diode;

first ends of the fourteenth capacitor, the fifteenth capacitor, the sixteenth capacitor and the seventeenth capacitor are connected with a VCC interface, and second ends of the fourteenth capacitor, the fifteenth capacitor, the sixteenth capacitor and the seventeenth capacitor are grounded;

a second pin of the driving chip is connected with a first end of the eighteenth capacitor, a second end of the eighteenth capacitor is grounded, a third pin of the driving chip is connected with a first end of the nineteenth capacitor, a second end of the nineteenth capacitor is grounded, a first pin of the second interface is connected with a fourth pin of the driving chip, and a second pin of the second interface is connected with a first end of the nineteenth capacitor;

a sixth pin of the driving chip is connected with a first end of the twentieth capacitor and a first end of the fifteenth resistor, a second end of the twentieth capacitor is grounded, and a second end of the fifteenth resistor is connected with a first end of the nineteenth capacitor;

a fifth pin of the driving chip is connected with a first end of the inductor and an anode of the sixth diode, a second end of the inductor is connected with a first end of the twenty-second capacitor, and a cathode of the sixth diode is connected with a second end of the twenty-second capacitor;

an eighth pin of the driving chip is connected with a cathode of the fifth diode, and an anode of the fifth diode is connected with a first end of the twenty-second capacitor;

the seventh pin of driver chip with the first end of sixteenth resistance and the first end of seventeenth resistance connect the back with VCC interface connection, the second end of sixteenth resistance and the second end of seventeenth resistance with the second pin of third interface is connected, the first pin of third interface with the first end of twenty-first electric capacity is connected, the second end of twenty-first electric capacity with the second end of twenty-second electric capacity connect the back with VCC interface connection, the first pin of third interface still with the positive pole of fifth diode and the second end of inductance is connected.

Optionally, the detection circuit for identifying the type of the ground brush further includes a fourth interface and a seventh diode, a first pin of the fourth interface is connected with the anode of the third diode and then grounded, a second pin of the fourth interface is connected with the anode of the seventh diode, and a cathode of the seventh diode is connected with the first end of the fourteenth capacitor.

Optionally, the fifth diode is a zener diode, and the sixth diode is a zener diode.

According to the technical scheme of the embodiment, the first detection end and the second detection end are connected with the floor brush, the pulse generation circuit is controlled to generate square waves with corresponding fixed frequency according to equivalent resistance value changes of the floor brush and send the square waves to the single chip microcomputer, and the single chip microcomputer compares the received square waves with preset square waves and determines the type of the floor brush; the problem of prior art can't detect the type that uses the scrubbing brush at present, can not implement different mode according to the difference of scrubbing brush, there is that user uses the experience relatively poor, the satisfaction is lower is solved, the technical scheme of this embodiment can detect the type of scrubbing brush, implements different mode according to the difference of scrubbing brush type to improve user and use experience, increase product satisfaction.

It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a circuit diagram of a detection circuit for identifying a type of a floor brush according to an embodiment of the present invention;

fig. 2 is a circuit diagram of a detection circuit for identifying a type of a floor brush according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating an operation principle of a detection circuit for identifying a type of a floor brush according to an embodiment of the present invention;

fig. 4 is a circuit diagram of another detection circuit for identifying a type of a floor brush according to an embodiment of the present invention;

fig. 5 is a circuit diagram of a detection circuit for identifying a type of a floor brush according to an embodiment of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a circuit diagram of a detection circuit for identifying a type of a floor brush provided by the embodiment of the present invention, fig. 2 is a circuit diagram of a detection circuit for identifying a type of a floor brush provided by the embodiment of the present invention, referring to fig. 1 and fig. 2, the embodiment of the present invention provides a detection circuit for identifying a type of a floor brush, including: the protection circuit 10, the pulse generating circuit 20, the charging and discharging circuit 30 and the singlechip 40; the protection circuit 10 is respectively connected with the pulse generation circuit 20 and the charge and discharge circuit 30, and the pulse generation circuit 20 is connected with the singlechip 40; the pulse generating circuit 20 includes: the circuit comprises a first resistor R13, a first detection end In1, a second detection end In2, a first capacitor C33 and a waveform generation chip U2; a first end of the first resistor R13 is connected with an output end of the protection circuit 10, a second end of the first resistor R13 is connected with a seventh pin 7 of the waveform generation chip U2 after being connected with a first detection end In1, a second detection end In2 is connected with a first end of the first capacitor C33 and then is connected with a sixth pin 6 and a second pin 2 of the waveform generation chip U2, and a second end of the first capacitor C33 is grounded; the first detection end In1 and the second detection end In2 are used for being connected with a ground brush, and the pulse generation circuit 20 is used for generating square waves and sending the square waves to the single chip microcomputer 40; the charge and discharge circuit 30 includes: the circuit comprises a third resistor R16, a fourth resistor R15, a first diode ZD2, a third capacitor C20 and a triode Q1; a first end of a third resistor R16 is connected with an output end of the protection circuit 10, a second end of the third resistor R16 is respectively connected with a first end of a fourth resistor R15 and a first end of a third capacitor C20, a second end of the third capacitor C20 is grounded, a second end of the fourth resistor R15 is respectively connected with a negative electrode of a first diode ZD2 and a base electrode of a triode Q1, an anode of the first diode ZD2 is connected with an emitting electrode of the triode Q1 and then grounded, and a collector electrode of the triode Q1 is connected with a second detection end In 2; the charging and discharging circuit 30 is used for turning off the pulse generating circuit 20 after a preset time length; the third pin 3 of the waveform generating chip U2 is connected with the single chip microcomputer 40, and the single chip microcomputer 40 compares the received square waves with preset square waves and determines the type of the floor brush.

Specifically, the first detection end In1 and the second detection end In2 are connected to a ground brush, and the ground brush can be different types of ground brushes. Fig. 2 only shows an exemplary case of detecting the ground brush, the ground brush may be equivalent to a second resistor R14, the resistance of the second resistor R14 is changed every time the ground brush is replaced, and the change of the resistance of the second resistor R14 may change the frequency of the square wave, so that the waveform generating chip U2 outputs the square wave with different frequencies.

An RC circuit formed by the third resistor R16 and the third capacitor C20 in the charging and discharging circuit 30 acts as a switch, and when the charging and discharging circuit is powered on, the third capacitor C20 is charged through the third resistor R16, and at this time, the base voltage of the triode Q1 is smaller than the emitter voltage and does not reach the conduction condition, so that the triode Q1 acts as an open circuit. The first capacitor C33 is sequentially charged by the first resistor R13 and the second resistor R14, and is discharged after being inverted, and the waveform generation chip U2 can continuously output a square wave with a specific frequency in an unstable state working mode. The square wave generated by the pulse generating circuit 20 is sent to the single chip microcomputer 40, a plurality of preset square waves are stored in the single chip microcomputer 40, the received square waves and the preset square waves are compared and analyzed by the single chip microcomputer 40, and the type of the floor brush is judged according to different square wave frequencies. After the third resistor R16 charges the third capacitor C20 for a period of time, the base voltage of the transistor Q1 is greater than the emitter voltage, so that the transistor Q1 is turned on, which is equivalent to a short circuit, and the pulse generating circuit 20 is turned off, so that the pulse generating circuit 20 stops working, and the square wave disappears. Thereby reducing the power consumption of the pulse generating circuit 20 and eliminating possible interference.

It should be noted that the duty ratio of the square wave can be adjusted by changing the resistance of the first resistor R13, so that the waveform generation chip U2 outputs the square wave with different duty ratios. The single-chip microcomputer 40 can also judge the type of the floor brush according to different square wave duty ratios.

The waveform generating chip U2 shown in fig. 2 has a model NE555, and NE555 is a widely used and common timing IC, and only needs a small number of resistors and capacitors to generate pulse signals with different frequencies required by the digital circuit. The first capacitor C33 has a model of 10nF/50V, the third resistor R16 has a resistance of 1M Ω, the fourth resistor R15 has a resistance of 4.7K Ω, the first resistor R13 has a resistance of 5.1K Ω, and the second resistor R14 has a resistance of 499K Ω.

Fig. 3 is a flowchart of the working principle of the detection circuit for identifying the type of the floor brush according to the embodiment of the present invention, referring to fig. 3, the floor brush is first connected, and then the circuit starts to operate stably after power is supplied. And after the power-on is finished, S110 is executed, and the pulse generating circuit generates square waves with fixed frequency. The pulse generating circuit sends the square wave to the single chip microcomputer, and then S120 is executed, the single chip microcomputer identifies the frequency of the pulse, and the type of the floor brush is judged. Then, S130 is executed, and the charge/discharge circuit starts charging. And if the triode does not reach the conduction condition, continuing to execute S140, and charging the charging and discharging circuit to the conduction voltage (3S-5S) of the triode. And (3) the triode reaches a conducting condition, and finally S150 is executed, the pulse generating circuit is closed, so that the power consumption is reduced, and the possibility of interference is eliminated.

According to the technical scheme of the embodiment, the first detection end and the second detection end are connected with the floor brush, the pulse generation circuit is controlled to generate square waves with corresponding fixed frequency according to equivalent resistance value changes of the floor brush and send the square waves to the single chip microcomputer, and the single chip microcomputer compares the received square waves with preset square waves and determines the type of the floor brush; the problem of prior art can't detect the type that uses the scrubbing brush at present, can not implement different mode according to the difference of scrubbing brush, there is that user uses the experience relatively poor, the satisfaction is lower is solved, the technical scheme of this embodiment can detect the type of scrubbing brush, implements different mode according to the difference of scrubbing brush type to improve user and use experience, increase product satisfaction.

Fig. 4 is a circuit diagram of a detection circuit for identifying a type of a floor brush according to an embodiment of the present invention, and referring to fig. 4, optionally, the protection circuit 10 includes: a fifth resistor R12, a sixth resistor R11, a seventh resistor R8, an eighth resistor R9, a second capacitor C17 and a second diode Z1;

a first end of a fifth resistor R12 is connected with the VCC interface, a second end of the fifth resistor R12 is connected with a first end of a sixth resistor R11, a second end of the sixth resistor R11 is connected with a first end of a seventh resistor R8, a second end of the seventh resistor R8 is connected with a first end of an eighth resistor R9, a second end of the eighth resistor R9 is respectively connected with a first end of a second capacitor C17 and a negative electrode of a second diode Z1, and a second end of the second capacitor C17 is connected with a positive electrode of the second diode Z1 and then grounded; a first end of the second capacitor C17 and a cathode of the second diode Z1 are output ends of the protection circuit 10.

Specifically, the VCC interface is used to provide a direct current voltage of 20V to 34V, the fifth resistor R12, the sixth resistor R11, the seventh resistor R8, and the eighth resistor R9 are all current-limiting resistors, and the current-limiting resistors are used to limit the magnitude of the branch current, and at the same time, the current-limiting resistors can also perform a voltage division function. The models of the fifth resistor R12, the sixth resistor R11, the seventh resistor R8 and the eighth resistor R9 are all 470R/1%. The second capacitor C17 and the second diode Z1 are used for voltage clamping, and protect elements in the circuit behind the protection circuit 10 from being damaged. The model of the second capacitor C17 is 10nF/50V.

With continuing reference to fig. 4, optionally, the detection circuit for identifying a type of brush further comprises: a ninth resistor R17, a fourth capacitor C4, a fifth capacitor C18 and a tenth resistor R63; a first end of the ninth resistor R17 is connected with a first end of the third capacitor C20 and then connected with a second end of the third resistor R16, and a second end of the ninth resistor R17 is connected with a second end of the third capacitor C20 and then grounded; a first end of a fourth capacitor C4 is connected with a fifth pin 5 of the waveform generation chip U2, and a second end of the fourth capacitor C4 is connected with a first pin 1 of the waveform generation chip U2 and then grounded; a first end of a fifth capacitor C18 is connected with the first resistor R13, and a second end of the fifth capacitor C18 is grounded; a first end of the tenth resistor R63 is connected to the eighth pin 8 of the waveform generation chip U2, and a second end of the tenth resistor R63 is connected to the third pin 3 of the waveform generation chip U2.

Specifically, the resistance of the ninth resistor R17 is 750K Ω, the model of the fourth capacitor C4 is 10nF/50V, the model of the fifth capacitor C18 is 100nF/50V, and the resistance of the tenth resistor R63 is 10K Ω. The fifth pin 5 of the waveform generation chip U2 is a control terminal that permits the trigger and gating voltages to be changed by external voltages, and the input can be used to change or adjust the output frequency when the timer is operating in a steady or oscillatory mode of operation. The first pin 1 ground of the waveform generating chip U2 is typically connected to circuit common ground. The eighth pin 8 of the waveform generating chip U2 is a positive power supply voltage terminal, and the supply voltage range is 4.5V to 16V. The third pin 3 of the waveform generating chip U2 is an output terminal for outputting a waveform with a fixed frequency.

With continued reference to fig. 4, optionally, the first diode ZD2 is a transient suppression diode and the second diode Z1 is a transient suppression diode.

Specifically, the first diode ZD2 and the second diode Z1 are both transient suppression diodes, which are high-efficiency protective devices in the form of diodes. When the positive and negative poles of the transient suppression diode are impacted by reverse transient high energy, the transient suppression diode can change the high impedance between the two poles into low impedance at the speed of 10 to the order of minus 12 seconds, absorb the surge power of thousands of watts and enable the voltage clamp between the two poles to be at a preset value, thereby effectively protecting devices in a circuit from being damaged by various surge pulses. The model of the first diode ZD2 is BZT52C5V1S, and the model of the second diode Z1 is BZT52C5V1S.

With continued reference to fig. 4, the transistor Q1 is optionally an NPN transistor.

Specifically, the transistor Q1 is an NPN type transistor, the model of which is MMBT5551, and the transistor Q1 mainly has a switching function in this embodiment, and is turned on when the voltage reaches a condition.

Fig. 5 is a circuit diagram of a further detecting circuit for identifying a type of a floor brush, referring to fig. 5, optionally, the detecting circuit for identifying a type of a floor brush further includes a system power supply and EMC circuit 50, the system power supply and EMC circuit 50 includes: the first interface J3, the sixth capacitor CD2, the seventh capacitor C5, the eleventh resistor R6, the twelfth resistor R7, the transformer T1, the eighth capacitor CD1, the ninth capacitor C13, the tenth capacitor C14, the eleventh capacitor C15, the twelfth capacitor C16, and the third diode ZD1; a first pin 1 of the first interface J3 is connected to first ends of a sixth capacitor CD2, a seventh capacitor C5, an eighth capacitor CD1, a ninth capacitor C13, a tenth capacitor C14, an eleventh capacitor C15, a twelfth capacitor C16, and a negative electrode of the third diode ZD1, respectively; a fourth pin 4 of the first interface J3 is connected to the second ends of the sixth capacitor CD2, the seventh capacitor C5, the eighth capacitor CD1, the ninth capacitor C13, the tenth capacitor C14, the eleventh capacitor C15, the twelfth capacitor C16, and the anode of the third diode ZD1, respectively; the first winding of the transformer T1 is connected in parallel with the eleventh resistor R6, and the second winding of the transformer T1 is connected in parallel with the twelfth resistor R7.

Specifically, the system power supply and EMC circuit 50 is mainly used to eliminate the interference of the detection circuit to the outside and the outside to the detection circuit. The first interface J3 is a power supply end and a signal acquisition end and is connected with an external system. The P + and P-of the first interface J3 are respectively connected with a battery module, and the power supply voltage range of the battery module is between 20V and 34V. The sixth capacitor CD2 and the eighth capacitor CD1 are electrolytic capacitors with the model of 50V/100uf. The models of the eleventh resistor R6 and the twelfth resistor R7 are both 0R. The size of the seventh capacitor C5 is 0.1uF, the models of the ninth capacitor C13, the tenth capacitor C14, the eleventh capacitor C15 and the twelfth capacitor C16 are all 0uF/50V, and the model of the third diode ZD1 is SMAJ51CA.

With continuing reference to fig. 5, optionally, the detection circuit for identifying the type of ground brush further comprises an interference cancellation circuit 60, the interference cancellation circuit 60 comprising: a thirteenth resistor R51, a fourteenth resistor R50, a thirteenth capacitor C10, and a fourth diode ZD6; a first end of the thirteenth resistor R51 and a first end of the fourteenth resistor R50 are both connected to the third pin 3 of the first interface J3, a second end of the thirteenth resistor R51 is connected to the anode of the fourth diode ZD6 and a second end of the thirteenth capacitor C10, and then grounded, a second end of the fourteenth resistor R50 is connected to the cathode of the fourth diode ZD6 and a first end of the thirteenth capacitor C10, and a first end of the thirteenth capacitor C10 is connected to the single chip microcomputer 40.

Specifically, the interference elimination circuit 60 is used to eliminate interference of the detection circuit for identifying the type of the floor brush with other external circuits. The resistance value of the thirteenth resistor R51 is 10K omega, the resistance value of the fourteenth resistor R50 is 1K omega, the model of the thirteenth capacitor C10 is 0.1uF/50V, and the model of the fourth diode ZD6 is ESDA0603-05.

With continuing reference to fig. 5, optionally, the detection circuit for identifying the type of the floor brush further comprises an illumination constant current source circuit 70, the illumination constant current source circuit 70 comprising: the driving circuit comprises a second interface J5, a third interface J4, a driving chip U1, a fourteenth capacitor C11, a fifteenth capacitor C12, a sixteenth capacitor C1, a seventeenth capacitor C6, an eighteenth capacitor C7, a nineteenth capacitor C9, a fifteenth resistor R5, a twentieth capacitor C8, a sixteenth resistor R2, a seventeenth resistor R3, an inductor L1, a twenty-first capacitor C2, a twenty-second capacitor C3, a fifth diode D2 and a sixth diode D1; first ends of a fourteenth capacitor C11, a fifteenth capacitor C12, a sixteenth capacitor C1 and a seventeenth capacitor C6 are connected with the VCC interface, and second ends of the fourteenth capacitor C11, the fifteenth capacitor C12, the sixteenth capacitor C1 and the seventeenth capacitor C6 are grounded; a second pin 2 of the driving chip U1 is connected with a first end of an eighteenth capacitor C7, a second end of the eighteenth capacitor C7 is grounded, a third pin 3 of the driving chip U1 is connected with a first end of a nineteenth capacitor C9, a second end of the nineteenth capacitor C9 is grounded, a first pin 1 of a second interface J5 is connected with a fourth pin 4 of the driving chip U1, and a second pin 2 of the second interface J5 is connected with a first end of the nineteenth capacitor C9; a sixth pin 6 of the driving chip U1 is connected to a first end of a twentieth capacitor C8 and a first end of a fifteenth resistor R5, a second end of the twentieth capacitor C8 is grounded, and a second end of the fifteenth resistor R5 is connected to a first end of a nineteenth capacitor C9; a fifth pin 5 of the driving chip U1 is connected to a first end of an inductor L1 and an anode of a sixth diode D1, a second end of the inductor L1 is connected to a first end of a twenty-second capacitor C3, and a cathode of the sixth diode D1 is connected to a second end of the twenty-second capacitor C3; an eighth pin 8 of the driving chip U1 is connected to a cathode of a fifth diode D2, and an anode of the fifth diode D2 is connected to a first end of a twenty-second capacitor C3; the seventh pin 7 of the driving chip U1 is connected to the first end of the sixteenth resistor R2 and the first end of the seventeenth resistor R3 and then connected to the VCC interface, the second end of the sixteenth resistor R2 and the second end of the seventeenth resistor R3 are connected to the second pin 2 of the third interface J4, the first pin 1 of the third interface J4 is connected to the first end of the twenty-first capacitor C2, the second end of the twenty-first capacitor C2 is connected to the second end of the twenty-second capacitor C3 and then connected to the VCC interface, and the first pin 1 of the third interface J4 is further connected to the positive electrode of the fifth diode D2 and the second end of the inductor L1.

Specifically, the constant current source circuit 70 outputs a substantially constant current within a power range, and mainly drives the light emitting diode to facilitate cleaning by the floor brush. The second interface J5 is connected with the photoresistor, and the third interface J4 is connected with the light-emitting diode. When the ambient light level decreases, the second interface J5 changes, enabling the lighting circuit.

The driving chip U1 is a BP1808, the BP1808 is a high-voltage DC-DC LED driving chip with multiple working modes and a wide input/output range, and a 70V/300m omega power switch is integrated inside the driving chip. BP1808 can operate in boost, buck, and buck-boost modes with input/output voltages ranging from 3V to 60VDC. BP1808 can adjust the magnitude of the output current through the external sampling resistance, the precision of its output current can reach + -3%. BP1808 may perform PWM and analog dimming via DIM Pin. BP1808 uses a fixed switching frequency of 420kHz, and can use small-sized inductors and input/output capacitors. The BP1808 has multiple protection functions, including overcurrent protection, input undervoltage protection, output overvoltage protection, chip overheat adjustment, and the like.

The fourteenth capacitor C11, the fifteenth capacitor C12 and the sixteenth capacitor C1 are all 0.1uF capacitors, the seventeenth capacitor C6 is 10uF/50V capacitors, the eighteenth capacitor C7 and the nineteenth capacitor C9 are all 0.1uF/50V capacitors, the fifteenth resistor R5 is 330K resistors, the twentieth capacitor C8 is 0.1uF/50V capacitors, the sixteenth resistor R2 and the seventeenth resistor R3 are all 2R7 capacitors, the inductor L1 is 47uH/0.4A capacitors, the twenty-first capacitor C2 and the twenty-second capacitor C3 are all 0.1uF/50V capacitors.

With reference to fig. 5, optionally, the detection circuit for identifying the type of the ground brush further includes a fourth interface J1 and a seventh diode D3, a first pin 1 of the fourth interface J1 is connected to the positive electrode of the third diode ZD1 and then grounded, a second pin 2 of the fourth interface J1 is connected to the positive electrode of the seventh diode D3, and a negative electrode of the seventh diode D3 is connected to the first end of the fourteenth capacitor C11.

Specifically, the fourth interface J1 is a motor device interface, the fourth interface J1 is connected to a motor, and the motor drives the floor brush to clean. The third diode ZD1 is model number SMAJ51CA, and the seventh diode D3 is model number DSS110.

With continued reference to fig. 5, optionally, the fifth diode D2 is a zener diode and the sixth diode D1 is a zener diode.

Specifically, the zener diode functions to protect or limit the voltage, so that the overall voltage remains substantially unchanged, ensuring the optimal performance and long operating life of the led. The fifth diode D2 and the sixth diode D1 are both DSS110 in model.

The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A detection circuit for identifying a type of a floor brush, comprising: the protection circuit, the pulse generation circuit, the charge and discharge circuit and the single chip microcomputer are connected;

the protection circuit is respectively connected with the pulse generation circuit and the charging and discharging circuit, and the pulse generation circuit is connected with the singlechip;

the pulse generating circuit includes: the device comprises a first resistor, a first detection end, a second detection end, a first capacitor and a waveform generation chip; a first end of the first resistor is connected with an output end of the protection circuit, a second end of the first resistor is connected with a seventh pin of the waveform generation chip after being connected with the first detection end, a second detection end is connected with a sixth pin and a second pin of the waveform generation chip after being connected with a first end of the first capacitor, and a second end of the first capacitor is grounded; the first detection end and the second detection end are used for being connected with a ground brush, and the pulse generation circuit is used for generating square waves and sending the square waves to the single chip microcomputer;

the charge and discharge circuit includes: the first resistor, the second resistor, the third capacitor and the triode are connected in series; the first end of the third resistor is connected with the output end of the protection circuit, the second end of the third resistor is respectively connected with the first end of the fourth resistor and the first end of the third capacitor, and the second end of the third capacitor is grounded; a second end of the fourth resistor is respectively connected with a negative electrode of the first diode and a base electrode of the triode, an anode of the first diode is connected with an emitting electrode of the triode and then grounded, and a collector of the triode is connected with the second detection end; the charging and discharging circuit is used for closing the pulse generating circuit after a preset time length;

and a third pin of the waveform generating chip is connected with the single chip microcomputer, and the single chip microcomputer compares the received square wave with a preset square wave and determines the type of the floor brush.

2. The circuit of claim 1, wherein the protection circuit comprises: the circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a second capacitor and a second diode;

a first end of the fifth resistor is connected with a VCC interface, a second end of the fifth resistor is connected with a first end of the sixth resistor, a second end of the sixth resistor is connected with a first end of the seventh resistor, a second end of the seventh resistor is connected with a first end of the eighth resistor, a second end of the eighth resistor is respectively connected with a first end of the second capacitor and a cathode of the second diode, and a second end of the second capacitor is connected with an anode of the second diode and then grounded; and the first end of the second capacitor and the cathode of the second diode are output ends of the protection circuit.

3. The circuit of claim 1, further comprising: a ninth resistor, a fourth capacitor, a fifth capacitor and a tenth resistor;

a first end of the ninth resistor is connected with a first end of the third capacitor and then connected with a second end of the third resistor, and a second end of the ninth resistor is connected with a second end of the third capacitor and then grounded;

the first end of the fourth capacitor is connected with the fifth pin of the waveform generation chip, and the second end of the fourth capacitor is connected with the first pin of the waveform generation chip and then grounded;

a first end of the fifth capacitor is connected with the first resistor, and a second end of the fifth capacitor is grounded;

and the first end of the tenth resistor is connected with the eighth pin of the waveform generation chip, and the second end of the tenth resistor is connected with the third pin of the waveform generation chip.

4. The circuit of claim 2, wherein the first diode is a transient suppression diode and the second diode is a transient suppression diode.

5. The circuit of claim 1, wherein the transistor is an NPN transistor.

6. The circuit of claim 1, further comprising a system power supply and EMC circuit, the system power supply and EMC circuit comprising: the circuit comprises a first interface, a sixth capacitor, a seventh capacitor, an eleventh resistor, a twelfth resistor, a transformer, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor and a third diode;

a first pin of the first interface is connected to first ends of the sixth capacitor, the seventh capacitor, the eighth capacitor, the ninth capacitor, the tenth capacitor, the eleventh capacitor, the twelfth capacitor, and a negative electrode of the third diode, respectively;

a fourth pin of the first interface is connected to second ends of the sixth capacitor, the seventh capacitor, the eighth capacitor, the ninth capacitor, the tenth capacitor, the eleventh capacitor, the twelfth capacitor, and an anode of the third diode, respectively;

the first winding of the transformer is connected with the eleventh resistor in parallel, and the second winding of the transformer is connected with the twelfth resistor in parallel.

7. The circuit of claim 6, further comprising an interference cancellation circuit, the interference cancellation circuit comprising: a thirteenth resistor, a fourteenth resistor, a thirteenth capacitor and a fourth diode;

the first end of the thirteenth resistor and the first end of the fourteenth resistor are connected with a third pin of the first interface, the second end of the thirteenth resistor, the anode of the fourth diode and the second end of the thirteenth capacitor are connected and then grounded, the second end of the fourteenth resistor, the cathode of the fourth diode and the first end of the thirteenth capacitor are connected, and the first end of the thirteenth capacitor is connected with the single chip microcomputer.

8. The circuit of claim 7, further comprising an illumination constant current source circuit, the illumination constant current source circuit comprising: the driving circuit comprises a second interface, a third interface, a driving chip, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a fifteenth resistor, a twentieth capacitor, a sixteenth resistor, a seventeenth resistor, an inductor, a twenty-first capacitor, a twenty-second capacitor, a fifth diode and a sixth diode;

first ends of the fourteenth capacitor, the fifteenth capacitor, the sixteenth capacitor and the seventeenth capacitor are connected with a VCC interface, and second ends of the fourteenth capacitor, the fifteenth capacitor, the sixteenth capacitor and the seventeenth capacitor are grounded;

a second pin of the driving chip is connected with a first end of an eighteenth capacitor, a second end of the eighteenth capacitor is grounded, a third pin of the driving chip is connected with a first end of a nineteenth capacitor, a second end of the nineteenth capacitor is grounded, a first pin of the second interface is connected with a fourth pin of the driving chip, and a second pin of the second interface is connected with a first end of the nineteenth capacitor;

a sixth pin of the driving chip is connected with a first end of the twentieth capacitor and a first end of the fifteenth resistor, a second end of the twentieth capacitor is grounded, and a second end of the fifteenth resistor is connected with a first end of the nineteenth capacitor;

a fifth pin of the driving chip is connected with a first end of the inductor and an anode of the sixth diode, a second end of the inductor is connected with a first end of the twenty-second capacitor, and a cathode of the sixth diode is connected with a second end of the twenty-second capacitor;

an eighth pin of the driving chip is connected with a cathode of the fifth diode, and an anode of the fifth diode is connected with a first end of the twenty-second capacitor;

the seventh pin of driver chip with the first end of sixteenth resistance and the first end of seventeenth resistance connect the back with VCC interface connection, the second end of sixteenth resistance and the second end of seventeenth resistance with the second pin of third interface is connected, the first pin of third interface with the first end of twenty-first electric capacity is connected, the second end of twenty-first electric capacity with the second end of twenty-second electric capacity connect the back with VCC interface connection, the first pin of third interface still with the positive pole of fifth diode and the second end of inductance is connected.

9. The circuit of claim 8, further comprising a fourth interface and a seventh diode, wherein a first pin of the fourth interface is connected to the anode of the third diode and then grounded, a second pin of the fourth interface is connected to the anode of the seventh diode, and a cathode of the seventh diode is connected to the first end of the fourteenth capacitor.

10. The circuit of claim 8, wherein the fifth diode is a zener diode and the sixth diode is a zener diode.

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