Cleaning base station and cleaning system

Abstract

The embodiment of the application discloses a cleaning base station and a cleaning system. The cleaning base station comprises a base, a detection piece and a circuit board. The base has an airflow channel inside. The airflow channel comprises a dust storage cavity and an air duct which are communicated with each other. The detection piece is arranged in the air duct. The detection piece is used for detecting an airflow signal in the air duct and generating a detection signal. The circuit board comprises a frequency conversion module and a controller which are electrically connected with each other. The frequency conversion module is electrically connected with the detection piece. The frequency conversion module is used for receiving the detection signal and performing frequency conversion to obtain a frequency signal. The controller is used for judging whether the airflow channel is blocked according to the frequency signal. The embodiment of the application improves the accuracy of detecting whether the airflow channel is blocked by arranging the detection piece in the air duct.

Description

Technical Field

[0001] This application relates to the field of clean technology, and more specifically, to a clean base station and a clean system. Background Technology

[0002] With the continuous improvement of living standards, automatic cleaning robots are widely used in homes, offices, hospitals and other places. However, the size of the sweeping robot and its internal components are limited, which prevents the size of the dustbin from being increased further. This results in users needing to clean the dustbin frequently. In order to collect the garbage in the dustbin, base stations have emerged to automatically collect the garbage in the sweeping robot's dustbin.

[0003] In related technologies, dust bags are installed inside base stations, and barometers are installed inside base stations to detect whether the dust bags are full. However, barometers are easily affected by external factors, such as electromagnetic interference, temperature fluctuations, or humidity changes, which reduces the accuracy of barometer detection and thus affects the user experience. Utility Model Content

[0004] This application provides a cleaning base station and a cleaning system, which aim to improve the accuracy of detecting whether the airflow channel is blocked.

[0005] The first aspect of this application provides a cleaning base station, which is applied to a cleaning system. The base station includes a base, a detection element, and a circuit board. The base has an airflow channel inside, which includes a dust storage chamber and an air duct that are interconnected. The detection element is disposed in the air duct and is used to detect the airflow signal in the air duct and generate a detection signal. The circuit board includes a frequency conversion module and a controller that are electrically connected to each other. The frequency conversion module is electrically connected to the detection element and is used to receive the detection signal and perform frequency conversion to obtain a frequency signal. The controller is used to determine whether the airflow channel is blocked based on the frequency signal.

[0006] A second aspect of this application provides a cleaning system, which includes a cleaning base station as described in any of the preceding claims and a cleaning robot. The cleaning robot includes a dust box for collecting garbage, and the dust box has a dust discharge port for communicating with the dust storage chamber.

[0007] This embodiment improves the accuracy of detection by placing the detection element inside the air duct to prevent dust in the dust storage chamber from affecting its detection. Furthermore, compared to the air pressure sensor in related technologies that directly outputs a signal to the controller after detecting the dust bag, this embodiment uses the detection element to detect the airflow signal within the air duct, generating a detection signal which is then sent to a frequency conversion module. This module converts the detection signal to a frequency signal, which is then sent to the controller. The controller can then determine whether the airflow channel is blocked based on this frequency signal. In other words, the detection signal output by the detection element in this embodiment needs to be processed by the frequency conversion module before outputting a frequency signal. Therefore, the frequency signal received by the controller has undergone frequency conversion processing. The frequency conversion module can suppress noise, filter interference, and enhance the signal in the detection signal to obtain a frequency signal with high accuracy and strong anti-interference capability. This improves the accuracy of the controller's judgment based on the frequency signal. In summary, this embodiment improves the accuracy of detecting whether the airflow channel is blocked. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a block diagram of a clean base station according to one embodiment of this application;

[0010] Figure 2 This is a block diagram of a frequency conversion module in one embodiment of this application;

[0011] Figure 3 This is a circuit diagram of a signal amplification circuit in one embodiment of this application;

[0012] Figure 4 This is a circuit diagram of the post-stage filter circuit in one embodiment of this application;

[0013] Figure 5 This is a circuit diagram of a frequency conversion circuit in one embodiment of this application;

[0014] Figure 6 This is a circuit diagram of a primary filter circuit in one embodiment of this application.

[0015] Reference numerals: 1-Clean base station; 10-Detection component; 11-Microphone; 20-Circuit board; 21-Frequency conversion module; 211-Signal amplification circuit; R1-First resistor; R2-Second resistor; R3-Third resistor; R4-Fourth resistor; C2-First capacitor; U1-First operational amplifier; 212-Post-stage filter circuit; R6-Fifth resistor; R7-Sixth resistor; R8-Seventh resistor; C5-Second capacitor; C6-Third capacitor; U2-Second operational amplifier; 213-Frequency conversion circuit; C7-Fourth capacitor; R9-Eighth resistor; R10-Ninth resistor; U3-Third operational amplifier; 214-Primary filter circuit; R5-Tenth resistor; C4-Fifth capacitor; C1-Sixth capacitor; C3-Seventh capacitor; D1-Diode; VCC-Power supply; Vref1-First reference voltage; Vref2-Second reference voltage; 22-Controller; 30-Prompt device. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0017] In related technologies, air pressure sensors are used to detect whether the dust bag of a base station is full or the air duct is blocked. The air pressure sensor is usually placed in the dust collection chamber that holds the dust bag. The air pressure sensor is easily affected by external factors, such as electromagnetic interference, temperature fluctuations, humidity changes, or when a lot of dust adheres to the outer surface of the dust bag and the dust bag is not full, the air pressure sensor is prone to misjudgment. The air pressure sensor is also easily contaminated by dust, which will reduce the accuracy of the air pressure sensor detection.

[0018] To address the aforementioned issues, this application provides a cleaning system. This system, for example, achieves an integrated solution for the automatic identification, collection, and treatment of dust, stains, hair, and other debris on environmental surfaces (such as floors and carpets) through the coordinated operation of mechanical structures, electronic control, and intelligent algorithms. The cleaning system can be applied to various scenarios, including offices, hospitals, homes, and industries; however, this application does not specifically limit its application to these applications. The cleaning system may include a cleaning base station and a cleaning robot.

[0019] Specifically, a cleaning robot is an intelligent device that can autonomously complete cleaning tasks without continuous human intervention, used to clean dust, stains, hair and other debris from environmental surfaces.

[0020] The cleaning robot includes a dustbin for collecting trash. Specifically, the dustbin has a suction port and a discharge port. During operation, the robot's main brush and side brushes gather dust, stains, debris, hair, and other trash into the suction port, which is then sucked into the dustbin via the suction duct. When the cleaning robot finishes its work or detects that the dustbin is full, it can no longer continue cleaning. At this point, the robot returns to the cleaning base station to discharge the trash from the dustbin. Since the cleaning base station is connected to the discharge port, the trash from the dustbin can be sucked into the base station through the discharge port. This reduces the need for frequent emptying of the dustbin, improving the user experience. Of course, this application does not specifically limit the material used for the dustbin; common materials used for making dustbins include plastics, metal alloys, and composite materials.

[0021] It should be noted that the cleaning robot can be a sweeping robot, a sweeping and mopping robot, a floor scrubbing robot, a handheld vacuum cleaner, a push cleaning machine, or a ride-on cleaning machine, etc., and this application embodiment does not specifically limit it.

[0022] The following is a detailed explanation of clean base stations.

[0023] Please see Figure 1 The clean base station 1 includes a base and a detection component 10.

[0024] The base is the main body of the cleaning base station 1, providing support for the other parts of the cleaning base station 1. The base also provides a charging interface to ensure the cleaning robot's battery life. It should be noted that the overall shape of the base is not specifically limited in this embodiment; for example, the overall shape of the base can be approximately a cuboid, cube, or cylinder.

[0025] The base has an airflow channel inside. Understandably, in order to facilitate the cleaning base station 1 to suck up the dust in the dust box, the airflow channel includes an interconnected dust storage chamber and an air duct, and the dust storage chamber is connected to the dust exhaust port. In this way, when the cleaning robot moves to the cleaning base station 1 and the cleaning base station 1 is working, the dust in the dust box can be sucked into the dust storage bag in the dust storage chamber through the dust exhaust port.

[0026] Furthermore, the clean base station 1 typically also includes an air extraction device. This device is connected to an air duct, which in turn is connected to a dust collection chamber. The dust collection chamber is connected to the dust outlet of the dust box. Therefore, by controlling the operation of the air extraction device, it draws gas from the air duct, creating negative pressure inside both the air duct and the dust collection chamber. This allows the waste in the dust box to enter the dust collection bag in the dust collection chamber through the dust outlet. It should be noted that this application does not specifically limit the type of air extraction device. For example, the air extraction device can be an air pump or a fan, etc.

[0027] The detection element 10 can be disposed within the air duct. It is understood that the detection element 10 can be fixed within the air duct by means of screws, snap-fits, magnetic attraction, etc., to prevent the detection element 10 from shaking within the air duct. The detection element 10 can be used to detect the airflow signal within the air duct and generate a detection signal IN. That is, when the dust box is full, the waste in the dust box can be sucked into the dust collection bag in the dust storage chamber. Since the dust collection bag in this embodiment is typically a commercially available dust collection bag, these dust collection bags are made of breathable conventional materials, such as common polyester. When the suction device performs suction, at least some of the gas in the dust collection bag is sucked out. It is understood that "dust" here should be interpreted broadly, including both fine dust and larger debris; therefore, to facilitate the detection of whether the dust storage chamber is full, this embodiment of the application disposes of the detection element 10 within the air duct to prevent dust adhering to the dust collection bag from affecting the detection of the detection element 10.

[0028] Of course, in order to further improve the accuracy of the detection of the test piece 10, a filter screen is usually set near the test piece 10 to prevent dust from interfering with the detection of the test piece 10.

[0029] Please continue reading. Figure 1 Furthermore, the clean base station 1 also includes a circuit board 20, which includes a frequency conversion module 21 and a controller 22 electrically connected to each other. The frequency conversion module 21 is electrically connected to the detection element 10. It is understood that when the detection element 10 detects the airflow signal within the duct and generates a detection signal IN, the frequency conversion module 21 receives the detection signal IN and performs frequency conversion on it to obtain a frequency signal OUT. Simultaneously, the frequency conversion module 21 sends the obtained frequency signal OUT to the controller 22, which can determine whether the airflow channel is blocked based on the received frequency signal OUT. The aforementioned airflow signal can be either airflow sound or airflow velocity.

[0030] For example, when the detection element 10 is used to detect the airflow sound in the duct, the detection element 10 can acquire the airflow sound in the duct and generate a detection signal IN, which is sent to the frequency conversion module 21. At this time, the frequency conversion module 21 can perform frequency conversion on the detection signal IN to obtain a frequency signal OUT and send it to the controller 22. The controller 22 can determine whether the airflow channel is blocked based on the frequency signal OUT. The controller 22 has a preset frequency signal of the normal airflow sound in the duct. After receiving the frequency signal OUT, the controller 22 compares it with the frequency signal of the normal airflow sound. If the frequency signal OUT received by the controller 22 is the same as the frequency signal of the normal airflow sound, the controller 22 determines that the airflow channel is blocked; if the frequency signal OUT received by the controller 22 is different from the frequency signal of the normal airflow sound, the controller 22 determines that the airflow channel is not blocked.

[0031] For example, when the detection element 10 is used to detect the airflow velocity in the duct, the detection element 10 can acquire the airflow velocity in the duct and generate a detection signal IN, which is sent to the frequency conversion module 21. At this time, the frequency conversion module 21 can perform frequency conversion on the detection signal IN to obtain a frequency signal OUT and send it to the controller 22. The controller 22 can determine whether the airflow channel is blocked based on the frequency signal OUT. The controller 22 has a preset frequency signal of the normal airflow velocity in the duct. After receiving the frequency signal OUT, the controller 22 compares it with the frequency signal of the normal airflow velocity. If the frequency signal OUT received by the controller 22 is the same as the frequency signal of the normal airflow velocity, the controller 22 determines that the airflow channel is blocked; if the frequency signal OUT received by the controller 22 is different from the frequency signal of the normal airflow velocity, the controller 22 determines that the airflow channel is not blocked.

[0032] That is, when the controller 22 detects that the frequency value of the processed frequency signal OUT exceeds the preset range, the controller 22 determines that the airflow channel is blocked; when the controller 22 detects that the frequency value of the processed frequency signal OUT is within the preset range, the controller 22 determines that the airflow channel is not blocked.

[0033] It should be noted that the aforementioned forms of airflow channel blockage can include duct blockage, dust bags in the dust collection chamber being full of dust, etc. In particular, when the dust bags in the dust collection chamber are full of garbage, the volume of the dust bags will expand, and the expanded dust bags will almost fill the volume of the dust collection chamber. This can cause the expanded dust bags to block the connection between the dust collection chamber and the duct, thus leading to airflow channel blockage. Therefore, dust bags in the dust collection chamber being full of dust is also one of the forms of airflow channel blockage.

[0034] This embodiment of the application improves the accuracy of detection by placing the detection element 10 inside the air duct to prevent dust in the dust storage chamber from affecting the detection of the detection element 10. Furthermore, compared to the air pressure sensor in related technologies that directly outputs a signal to the controller 22 after detecting the dust bag, this embodiment uses the detection element 10 to detect the airflow signal in the air duct, generating a detection signal IN and sending it to the frequency conversion module 21. The frequency conversion module 21 performs frequency conversion on the detection signal IN to obtain a frequency signal OUT, which is then sent to the controller 22. The controller 22 can determine whether the airflow channel is blocked based on the frequency signal OUT. In other words, the detection signal IN output by the detection element 10 in this embodiment needs to be processed by the frequency conversion module 21 before outputting the frequency signal OUT. Therefore, the frequency signal OUT received by the controller 22 has undergone frequency conversion processing. The frequency conversion module 21 can suppress noise, filter interference, and enhance the signal in the detection signal IN to obtain a frequency signal OUT with high accuracy and strong anti-interference capability. This improves the accuracy of the controller 22's judgment based on the frequency signal OUT. In summary, this embodiment improves the accuracy of detecting whether the airflow channel is blocked.

[0035] Furthermore, compared to related technologies where an air pressure channel is set up in the cleaning base station 1 in order to meet the requirement of the air pressure sensor to detect whether the dust collection bag is full, and the air pressure sensor is set in the air pressure channel, the present application embodiment can eliminate the design of the air pressure channel by setting the detection element 10 in the air duct, so that the overall design of the cleaning base station 1 is simpler.

[0036] It should be noted that the detection element 10 may include at least one of a microphone 11 and a flow rate sensor. The microphone 11 is used to detect the sound of airflow within the airflow channel; the flow rate sensor is used to detect the airflow velocity within the airflow channel. However, this embodiment does not specifically limit the types of microphone 11 and flow rate sensor. Furthermore, when the detection element 10 is a microphone 11, the microphone 11 can be installed inside the air duct, or it can be installed inside the cleaning base station 1 and near the air duct, so that the microphone 11 can detect the sound of airflow within the airflow channel. When the detection element 10 is a flow rate sensor, the flow rate sensor must be installed inside the air duct.

[0037] For example, when the detection element 10 is a microphone 11, the microphone 11 may include a back electrode plate and a diaphragm spaced apart from and opposite to the back electrode plate to form a parallel plate capacitor. Specifically, the microphone 11 may be a microelectromechanical system (MEMS) microphone, which has the characteristics of high reliability, high signal-to-noise ratio, and low power consumption. Furthermore, the MEMS microphone is small in size to accommodate placement within the air duct. The working principle of this MEMS microphone utilizes two parallel plates: a solid back plate (the aforementioned back electrode plate) and an elastic movable diaphragm to form a variable capacitor (the aforementioned parallel plate capacitor). When sound from within the airflow channel strikes the elastic movable diaphragm, the diaphragm moves, thereby changing the capacitance with the solid back plate to generate a detection signal IN, which is sent to the frequency conversion module 21. Moreover, compared to the use of a pressure sensor in related technologies, the detection element 10 in this embodiment is a MEMS microphone, thus reducing the manufacturing cost of the cleaning base station 1.

[0038] Furthermore, the structure of the barometric pressure sensor in the related technology is relatively complex and easily affected by external factors. As a result, the performance of the barometric pressure sensor will gradually decline due to long-term use, thereby reducing the accuracy of the barometric pressure sensor detection. In contrast, the embodiment of this application uses a microphone, which has a relatively simple structure, thus reducing the probability of microphone failure during long-term use and ensuring its long-term reliable operation.

[0039] For example, when the detection element 10 is a flow rate sensor, the flow rate sensor is a device for measuring the flow velocity of gas. The flow rate sensor is located in the air duct, and the position of the flow rate sensor in the air duct usually needs to be in the positive direction of the airflow so that the flow rate sensor can better detect the flow velocity of the airflow in the air duct to generate a detection signal IN.

[0040] Please continue reading. Figure 1 In some embodiments, to facilitate notification to the user that the dust collection chamber of the cleaning base station 1 is full or the air duct is blocked, the cleaning base station 1 may also include a notification device 30, which is electrically connected to the controller 22. It is understood that when the controller 22 detects that the frequency value of the frequency signal OUT processed by the frequency conversion module 21 exceeds a preset range, the controller 22 can control the notification device 30 to output a notification message indicating that the dust collection chamber is full or the air duct is blocked, so that the user can be promptly informed that the dust bag in the dust collection chamber needs to be cleaned.

[0041] It should be noted that this application embodiment does not specifically limit the manner in which the prompting device 30 outputs prompt information indicating that the dust collection chamber is full or the air duct is blocked. For example, the prompting device 30 may include a display screen mounted on a base, allowing the user to view whether the prompt indicates that the dust collection chamber is full or the air duct is blocked. For example, the prompting device 30 may include an alarm, which can sound an alarm when the dust collection chamber is full or the air duct is blocked to alert the user. Of course, the prompting device 30 can also be electrically connected to the user's electronic device, so that the prompting device 30 sends the information indicating that the dust collection chamber is full or the air duct is blocked to the user's electronic device for the user's awareness.

[0042] Please see Figures 1-2 In some embodiments, the frequency conversion module 21 includes a signal amplification circuit 211, a post-stage filter circuit 212, and a frequency conversion circuit 213.

[0043] Specifically, the input terminal of the signal amplification circuit 211 is electrically connected to the detection element 10 to receive the detection signal IN generated by the detection element 10; the input terminal of the subsequent filtering circuit 212 is electrically connected to the output terminal of the signal amplification circuit 211 to filter the detection signal IN; the input terminal of the frequency conversion circuit 213 is electrically connected to the output terminal of the subsequent filtering circuit 212, and the output terminal of the frequency conversion circuit 213 is electrically connected to the input terminal of the controller 22 to perform frequency conversion on the filtered detection signal IN, and output a frequency signal OUT to the controller 22, so that the controller 22 can determine whether the airflow channel is blocked based on the frequency signal OUT. If the controller 22 determines that the airflow channel is blocked, it can control the prompting device 30 to work to output a prompt message that the dust storage chamber is full or the air duct is blocked, so that the user can be aware that the cleaning base station 1 has malfunctioned, thereby improving the accuracy of airflow channel blockage detection.

[0044] Please see Figure 3 In some embodiments, the signal amplification circuit 211 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C2, and a first operational amplifier U1.

[0045] Specifically, one end of the first resistor R1 is electrically connected to the output terminal of the detection element 10 to receive the detection signal IN generated by the detection element 10; the other end of the first resistor R1 is electrically connected to one end of the third resistor R3 and the non-inverting input terminal of the first operational amplifier U1; the other end of the third resistor R3 is grounded; one end of the second resistor R2 is electrically connected to the inverting input terminal of the first operational amplifier U1, and the other end of the second resistor R2 is grounded; one end of the fourth resistor R4 connected in parallel with the first capacitor C2 is electrically connected to the inverting input terminal of the first operational amplifier U1, and the other end of the fourth resistor R4 connected in parallel with the first capacitor C2 is electrically connected to the output terminal of the first operational amplifier U1; the output terminal of the first operational amplifier U1 is electrically connected to the input terminal of the subsequent filter circuit 212. It is understandable that when the detection device 10 is a microphone 11, the detection signal IN generated by the microphone 11 to detect the sound of airflow in the duct is at the millivolt level, while the controller 22 usually needs the volt level to recognize it. Therefore, the detection signal IN needs to be amplified to meet the recognition requirements of the controller 22. That is, the core function of the first operational amplifier U1 is to amplify the detection signal IN. Specifically, after the first resistor R1 is connected to the detection signal IN output by the detection device 10, the non-inverting input of the first operational amplifier U1 receives the detection signal IN and processes it. The output of the first operational amplifier U1 outputs the amplified detection signal IN. The third resistor R3 and the fourth resistor R4 form a feedback circuit. By adjusting the resistance ratio of the third resistor R3 and the fourth resistor R4, the first operational amplifier U1 can amplify the detection signal IN proportionally to meet the range that the controller 22 can recognize. The first resistor R1 serves to limit current and divide voltage to protect the non-inverting input of the first operational amplifier U1 from excessive current. The first capacitor C2 serves to filter high-frequency noise to ensure the normal operation of the first operational amplifier U1.

[0046] Please see Figure 4 In some embodiments, the post-stage filter circuit 212 includes a fifth resistor R6, a sixth resistor R7, a seventh resistor R8, a second capacitor C5, a third capacitor C6, and a second operational amplifier U2.

[0047] Specifically, one end of the fifth resistor R6 is electrically connected to the output of the signal amplifier circuit 211 to receive the amplified detection signal IN. The other end of the fifth resistor R6 is electrically connected to one end of the second capacitor C5 and one end of the sixth resistor R7. The other end of the sixth resistor R7 is electrically connected to the output of the second operational amplifier U2. The other end of the second capacitor C5 is electrically connected to the non-inverting input of the second operational amplifier U2, one end of the seventh resistor R8 and one end of the third capacitor C6 are electrically connected, and the other ends of the seventh resistor R8 and the third capacitor C6 are both grounded. The inverting input of the second operational amplifier U2 is electrically connected to the output of the second operational amplifier U2, and the output of the second operational amplifier U2 is electrically connected to the input of the frequency conversion circuit 213. Understandably, the amplified detection signal IN enters through the fifth resistor R6, while the second capacitor C5 and the fifth resistor R6 form part of a high-pass filter to allow high-frequency signals to pass and block low-frequency signals. In this way, part of the detection signal IN can be filtered out. After filtering by the second capacitor C5, the detection signal IN is input to the non-inverting input of the second operational amplifier U2, and after processing by the second operational amplifier U2, the filtered detection signal IN is output to the frequency conversion circuit 213.

[0048] Please see Figure 5 In some embodiments, the frequency conversion circuit 213 includes a fourth capacitor C7, an eighth resistor R9, a ninth resistor R10, and a third operational amplifier U3.

[0049] Specifically, one end of the fourth capacitor C7 is electrically connected to the output of the subsequent filter circuit 212, and the other end of the fourth capacitor C7 is electrically connected to one end of the eighth resistor R9; the other end of the eighth resistor R9 is electrically connected to the non-inverting input of the third operational amplifier U3 and one end of the ninth resistor R10, and the other end of the ninth resistor R10 is electrically connected to the output of the third operational amplifier U3; the inverting input of the third operational amplifier U3 is used to connect to the second reference voltage Vref2; the output of the third operational amplifier U3 is electrically connected to the input of the controller 22. It can be understood that the detection signal IN, after being filtered by the subsequent filter circuit 212, is input to the non-inverting input of the third operational amplifier U3 through the fourth capacitor C7 and the eighth resistor R9. At this time, the third operational amplifier U3 is used as a comparator; that is, the filtered detection signal IN is input to the third operational amplifier U3, and the inverting input of the third operational amplifier U3 also receives the second reference voltage Vref2. After comparison, the frequency signal OUT is output to the controller 22. Among them, the eighth resistor R9 and the ninth resistor R10 not only form a voltage divider circuit for the input signal, but also form a feedback network for the third operational amplifier U3. This feedback network determines the gain and frequency response of the third operational amplifier U3.

[0050] Taking the microphone 11 as an example of the detection component 10, when the microphone 11 is working to detect the sound of airflow in the air duct, the cleaning base station 1 is in normal operation; that is, when the dust storage chamber is not full or the air duct is not blocked, the detection signal IN collected by the microphone 11 is processed into the first audio signal; when the cleaning base station 1 is in an abnormal state; that is, when the dust storage chamber is full or the air duct is blocked, the detection signal IN collected by the microphone 11 is processed into the second audio signal. Since the fan in the air extraction device operates at a higher speed when the dust storage chamber is full or the air duct is blocked, the operating condition of the second audio signal is higher than that of the first audio signal, so that the subsequent filtering circuit 212 can filter the first audio signal to output the second audio signal, and the frequency conversion circuit 213 converts the second audio signal into the corresponding frequency signal OUT to output to the controller 22; however, in order to ensure the accuracy of detection, the controller 22 can determine whether the airflow channel of the frequency signal OUT is blocked based on the frequency signal OUT.

[0051] In related technologies, the detection device 10 also acquires the sound of the environment around the clean base station 1, which affects the recognition of the controller 22.

[0052] Please see Figure 6 Therefore, in some embodiments, the circuit board 20 further includes a primary filter circuit 214, wherein the primary filter circuit 214 is electrically connected to the detection element 10 to receive the detection signal IN; that is, when the detection element 10 generates the detection signal IN and inputs it to the primary filter circuit 214, the primary filter circuit 214 can filter the sound of the environment around the clean base station 1 to reduce interference.

[0053] Furthermore, the primary filter circuit 214 includes a tenth resistor R5, a fifth capacitor C4, a sixth capacitor C1, a seventh capacitor C3, and a diode D1.

[0054] Specifically, one end of the tenth resistor R5 is connected to the power supply VCC, and the other end of the tenth resistor R5 is electrically connected to one end of the detection element 10, one end of the fifth capacitor C4, and one end of the sixth capacitor C1; the other end of the detection element 10 and the other end of the fifth capacitor C4 are grounded; the anode of the diode D1 is connected to the first reference voltage Vref1, and the cathode of the diode D1 is electrically connected to the other end of the sixth capacitor C1 and one end of the seventh capacitor C3; the other end of the seventh capacitor C3 is electrically connected to the input terminal of the frequency conversion module 21. It is understandable that, taking the microphone 11 as an example of the detection component 10, since the sound of the environment around the cleaning base station 1 that the microphone 11 can acquire is 20 decibels lower than the airflow sound of the duct, the sound of the environment around the cleaning base station 1 can be filtered out by appropriately adjusting the voltage value of the first reference voltage Vref1. At the same time, some of the sound interference caused by the slight vibration of the microphone 11 during operation can also be filtered out. The tenth resistor R5 is electrically connected to the power supply VCC to supply power to the primary filter circuit 214 and the microphone 11. The fifth capacitor C4 can filter out some unwanted detection signals IN according to the set resistance value. The diode D1 is used to work in the reverse breakdown region. When the voltage of the first reference voltage Vref1 exceeds its breakdown voltage, it conducts, thereby stabilizing the first reference voltage Vref1. The sixth capacitor C1 and the seventh capacitor C3 serve to isolate the DC voltage so that the seventh capacitor C3 outputs the AC detection signal IN to the input terminal of the frequency conversion module 21.

[0055] It should be noted that the primary filter circuit 214 can also be set on the detection element 10, and this embodiment does not specifically limit this.

[0056] Taking the microphone 11 as an example of the detection component 10, the following is a detailed analysis of the circuit described above: The microphone 11 can continuously acquire the airflow sound in the duct and generate a detection signal IN; this detection signal IN is input to the primary filter circuit 214, which can filter out ambient sounds around the cleaning base station 1, and outputs an AC detection signal IN to the input terminal of the amplifier circuit after passing through the sixth capacitor C1 and the seventh capacitor C3; the amplifier circuit can amplify the detection signal IN by adjusting the resistance ratio of the third resistor R3 and the fourth resistor R4 and the first operational amplifier U1, thereby satisfying the recognition of the controller 22, and inputting the amplified detection signal IN to the subsequent filter circuit 212; the second operational amplifier U2 in the subsequent filter circuit 212 further filters the amplified detection signal IN to form a filtered detection signal IN and inputs it to the frequency conversion circuit 213; the frequency conversion circuit 213 performs frequency conversion on the filtered detection signal IN to output a frequency signal OUT corresponding to the filtered detection signal IN; the controller 22 can receive the frequency signal OUT to determine whether the airflow duct is blocked at this time. That is, if the airflow duct is not blocked, the controller 22 will not control the prompting device 30 to work; if the airflow duct is blocked, the controller 22 will detect that the frequency value of the frequency signal OUT exceeds the preset range, and control the prompting device 30 to output a prompt message that the dust collection chamber is full or the airflow duct is blocked, so as to prompt the user that the dust collection chamber is full or the airflow duct is blocked, thereby improving the user experience.

[0057] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0058] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A clean base station, characterized in that, The cleaning base station is used in a cleaning system and includes: The base has an internal airflow channel, which includes interconnected dust storage chambers and air ducts; A detection element, disposed within the air duct, is used to detect airflow signals within the air duct and generate a detection signal; and, The circuit board includes a frequency conversion module and a controller that are electrically connected to each other. The frequency conversion module is electrically connected to the detection element and is used to receive the detection signal and perform frequency conversion to obtain a frequency signal. The controller is used to determine whether the airflow channel is blocked based on the frequency signal.

2. The clean base station as described in claim 1, characterized in that, The detection device includes at least one of a microphone and a flow rate sensor, and the airflow signal is airflow sound or airflow velocity.

3. The clean base station as described in claim 2, characterized in that, The microphone includes a backplate and a diaphragm spaced apart from and opposite to the backplate to form a parallel plate capacitor.

4. The clean base station as described in claim 1, characterized in that, The frequency conversion module includes: The signal amplification circuit has its input terminal electrically connected to the detection element; The input terminal of the subsequent filter circuit is electrically connected to the output terminal of the signal amplification circuit; and, The frequency conversion circuit has its input terminal electrically connected to the output terminal of the subsequent filter circuit, and its output terminal electrically connected to the input terminal of the controller.

5. The clean base station as described in claim 4, characterized in that, The signal amplification circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, and a first operational amplifier; One end of the first resistor is electrically connected to the output terminal of the detection device, and the other end of the first resistor is electrically connected to one end of the third resistor and the non-inverting input terminal of the first operational amplifier; the other end of the third resistor is grounded. One end of the second resistor is electrically connected to the inverting input terminal of the first operational amplifier, and the other end of the second resistor is grounded; One end of the fourth resistor connected in parallel with the first capacitor is electrically connected to the inverting input terminal of the first operational amplifier, and the other end is electrically connected to the output terminal of the first operational amplifier. The output terminal of the first operational amplifier is electrically connected to the input terminal of the subsequent filter circuit.

6. The clean base station as described in claim 4, characterized in that, The subsequent filtering circuit includes a fifth resistor, a sixth resistor, a seventh resistor, a second capacitor, a third capacitor, and a second operational amplifier; One end of the fifth resistor is electrically connected to the output terminal of the signal amplification circuit, the other end of the fifth resistor is electrically connected to one end of the second capacitor and one end of the sixth resistor, the other end of the sixth resistor is electrically connected to the output terminal of the second operational amplifier, the other end of the second capacitor is electrically connected to the non-inverting input terminal of the second operational amplifier, one end of the seventh resistor and one end of the third capacitor are electrically connected, and the other ends of the seventh resistor and the third capacitor are both grounded. The inverting input terminal of the second operational amplifier is electrically connected to the output terminal of the second operational amplifier, and the output terminal of the second operational amplifier is electrically connected to the input terminal of the frequency conversion circuit.

7. The clean base station as described in claim 4, characterized in that, The frequency conversion circuit includes a fourth capacitor, an eighth resistor, a ninth resistor, and a third operational amplifier; One end of the fourth capacitor is electrically connected to the output terminal of the subsequent filter circuit, and the other end of the fourth capacitor is electrically connected to one end of the eighth resistor. The other end of the eighth resistor is electrically connected to the non-inverting input terminal of the third operational amplifier and one end of the ninth resistor, and the other end of the ninth resistor is electrically connected to the output terminal of the third operational amplifier. The inverting input of the third operational amplifier is used to connect to the second reference voltage; the output of the third operational amplifier is electrically connected to the input of the controller.

8. The clean base station as described in claim 1, characterized in that, The circuit board also includes: A primary filter circuit is electrically connected to the detection element to receive the detection signal.

9. The clean base station as described in claim 8, characterized in that, The primary filter circuit includes a tenth resistor, a fifth capacitor, a sixth capacitor, a seventh capacitor, and a diode; One end of the tenth resistor is used to connect to a power source, and the other end of the tenth resistor is electrically connected to one end of the detection element, one end of the fifth capacitor, and one end of the sixth capacitor. The other end of the detection element and the other end of the fifth capacitor are grounded; The anode of the diode is used to connect to the first reference voltage, the cathode of the diode is electrically connected to the other end of the sixth capacitor and one end of the seventh capacitor, and the other end of the seventh capacitor is electrically connected to the input terminal of the frequency conversion module.

10. The clean base station as described in claim 1, characterized in that, When the frequency value of the frequency signal exceeds a preset range, the controller determines that the airflow channel is blocked; When the frequency value of the frequency signal is within the preset range, the controller determines that the airflow channel is not blocked.

11. The clean base station as described in any one of claims 1-10, characterized in that, Also includes: The prompting device is electrically connected to the controller. When the controller detects that the frequency value of the processed frequency signal exceeds a preset range, the controller controls the prompting device to output a prompt message indicating that the dust storage chamber is full or the air duct is blocked.

12. A cleaning system, characterized in that, include: The clean base station as described in any one of claims 1-11; as well as, A cleaning robot includes a dust box for collecting garbage, the dust box having a dust outlet for communicating with a dust storage chamber.

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