Noise reduction method, smart home device and system

Abstract

The present invention relates to the field of smart home, and in particular to a noise reduction method, smart home equipment and system. The noise reduction method comprises: configuring an adaptive load module and a control module in the equipment, wherein the adaptive load module has an adjustable resistance value, and the control module communicates externally and adjusts the resistance value of the adaptive load module; configuring a first noise pickup sensor, a first adaptive module, a second noise pickup sensor and a second adaptive module in the noise detection front end; the noise detection front end detects the noise of the equipment, and when the noise of the equipment is abnormal, the noise detection front end sends an abnormal signal to the control module, and the control module controls the adaptive load module to lower the resistance value, and by matching the maximum impedance value of the adaptive load, the frequency band of power supply noise is avoided while meeting low power consumption, thereby achieving noise reduction or elimination.

Description

Technical Field

[0001] The present invention relates to the field of smart homes, and in particular to a noise reduction method, smart home equipment and a system. Background Art

[0002] Smart home is a modern home system that integrates advanced technology, which enables various household devices used in daily life to connect and communicate with each other, and can be remotely monitored and controlled through a central control system or mobile devices (such as smartphones and tablets). Smart home not only improves the convenience of life, but also improves energy efficiency by optimizing energy use and increases the safety of the home.

[0003] The core of the smart home system is the central control system, which is usually a user-friendly device or software platform through which users can control and manage various smart devices in the home. Smart home devices can automatically adjust their status according to preset schedules, user behavior habits or environmental conditions. Users can also remotely control them through smartphone applications or voice assistants. As the popularity of smart homes increases, the application of smart switches, smart voice panels, smart sockets and smart temperature control devices is also increasing. However, high-speed switching power supplies are commonly used in smart home devices, and the power switches may generate noise caused by magnetic field interference or mechanical vibration when working. Especially in mass production, the differences in devices and the consistency of manufacturing will make this noise problem more significant. This noise problem reduces the comfort of people's home life, especially in a silent environment, this noise may be perceived as discomfort by people. For light sleepers or people who are sensitive to environmental noise, the noise of the power switch may interfere with sleep, resulting in poor sleep quality and affecting health. Summary of the invention

[0004] The first object of the present invention is to provide a noise reduction method, aiming to improve the problem of excessive noise caused by the use of high-speed switching power supplies in conventional smart home devices.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A noise reduction method, comprising:

[0007] An adaptive load module and a control module are configured in the device, wherein the adaptive load module has an adjustable resistance value, the adaptive load module is connected to the rear end of the power module of the device, and the control module communicates externally and adjusts the resistance value of the adaptive load module;

[0008] A first noise pickup sensor, a first adaptive module, a second noise pickup sensor and a second adaptive module are configured in the noise detection front end, the first adaptive module sets the noise screening frequency of the first noise pickup sensor, and the second adaptive module sets the noise screening frequency of the second noise pickup sensor; wherein the first noise pickup sensor picks up environmental noise plus equipment noise, the second noise pickup sensor picks up environmental noise, the first adaptive module and the second adaptive module set the noise screening frequency according to the type of the equipment; the equipment noise is measured according to the picking results of the first noise pickup sensor and the second noise pickup sensor;

[0009] The noise detection front end detects the noise of the device and determines the state of the device noise according to a set threshold. When the device noise is abnormal, the noise detection front end sends an abnormal signal to the control module, and the control module controls the adaptive load module to lower the resistance value. Thereafter, the noise detection front end re-detects the noise of the device.

[0010] Furthermore, the noise detection front end sends an abnormal signal to the control module, and the control module controls the adaptive load module to lower the resistance value, which further includes the following sub-steps:

[0011] Query the device database. When the device database has a corresponding noise-resistance mapping table and it is the first time to adjust according to the noise-resistance mapping table saved in the device database, adjust the resistance of the adaptive load module according to the noise-resistance mapping table. When the device database does not have a corresponding noise-resistance mapping table or it is not the first time to adjust according to the noise-resistance mapping table saved in the device database, lower the resistance of the adaptive load module and re-detect the device noise.

[0012] Furthermore, the step of detecting the noise of the device by the noise detection front end further includes the following sub-steps:

[0013] The device type is identified and compared with the device parameters in the device database. When the device parameters exist in the device database, the frequency band corresponding to the device is called to set the parameters of the first adaptive module, the second adaptive module and the noise threshold, and the first adaptive module and the second adaptive module are adjusted to adapt to the filtering frequency band of the current device; the device noise is collected and compared with the noise threshold. When the device parameters do not exist in the device database, the first adaptive module and the second adaptive module are started to sweep the frequency, and the impedance values ​​of the first adaptive module and the second adaptive module are increased in sequence until the filtering frequency band suitable for the current device is selected, and the device noise is collected and compared with the noise threshold.

[0014] The state of the equipment noise is determined according to the set threshold. When the equipment noise is normal, it is judged as qualified and a normal device is output; when the equipment noise is abnormal, the equipment abnormality is reported, and the abnormal frequency band data of the equipment is stored in the database, and the noise detection front end sends an abnormal signal to the control module.

[0015] A second object of the present invention is to provide a smart home device, aiming to improve the problem of excessive noise caused by using a high-speed switching power supply.

[0016] To achieve the above object, the present invention adopts the following technical solutions:

[0017] A smart home device, used to perform the noise reduction method as described above, comprising:

[0018] Power module;

[0019] An adaptive load module is arranged at the rear end of the device power supply, and includes a plurality of load groups, the load groups are connected in series between the power supply module and the ground, and the load groups include loads and switch elements connected in parallel with each other;

[0020] The control module is electrically connected to the control end of the switch element, receives the abnormal signal and controls the on and off of the switch element, thereby controlling the load to be connected to the circuit or short-circuited.

[0021] Further, the load group is four groups, the load includes resistor R21, resistor R22, resistor R23, resistor R24; the switch includes MOS transistor Q21, MOS transistor Q22, MOS transistor Q23, MOS transistor Q24;

[0022] The resistor R21, the resistor R22, the resistor R23 and the resistor R24 ​​are sequentially connected in series between the power module and the ground of the smart home device, the source and the drain of the MOS tube Q21 are electrically connected to the two ends of the resistor R21; the source and the drain of the MOS tube Q22 are electrically connected to the two ends of the resistor R22; the source and the drain of the MOS tube Q23 are electrically connected to the two ends of the resistor R23; the source and the drain of the MOS tube Q24 are electrically connected to the two ends of the resistor R24; the gates of the MOS tubes Q21, Q22, Q23 and Q24 are all electrically connected to the control module;

[0023] The control module is connected to the host computer via wireless communication.

[0024] The third objective of the present invention is to provide a smart home system, aiming to improve the problem of excessive noise caused by the use of high-speed switching power supplies in existing smart home systems.

[0025] To achieve the above object, the present invention adopts the following technical solutions:

[0026] A smart home system includes a smart home device and a noise detection front end for detecting noise of the smart home device, wherein the smart home device is the smart home device as described above.

[0027] Further, the noise detection front end includes a first noise pickup sensor, a second noise pickup sensor, a first adaptive module, a second adaptive module, a first amplification module, a second amplification module, an environmental noise elimination module, a noise threshold setting module and a control communication module;

[0028] The first noise pickup sensor picks up environmental noise plus equipment noise, and the second noise pickup sensor picks up environmental noise. The output ends of the first noise pickup sensor and the second noise pickup sensor are electrically connected to the input ends of the first adaptive module and the second adaptive module respectively, and the output ends of the first adaptive module and the second adaptive module are electrically connected to the input ends of the first amplification module and the second amplification module respectively. The output ends of the first amplification module and the second amplification module are electrically connected to the input end of the environmental noise elimination module, the output end of the environmental noise elimination module is electrically connected to the input end of the noise threshold setting module, the output end of the noise threshold setting module is electrically connected to the control communication module, the control end of the control communication module is electrically connected to the first adaptive module, the second adaptive module and the noise threshold setting module, and the control communication module is wirelessly connected to the host computer.

[0029] Further, the first adaptive module includes a resistor R25 and a first adaptive filter group and a third adaptive filter group;

[0030] The second adaptive module includes a resistor R26, a second adaptive filter group, and a fourth adaptive filter group;

[0031] One end of the resistor R25 is electrically connected to the power module, the other end of the resistor R25 is electrically connected to the pin 1 of the first noise pickup sensor, and the first adaptive filter group and the third adaptive filter group are connected in series between the other end of the resistor R25 and the input end of the first amplification module;

[0032] One end of the resistor R26 is electrically connected to the power module, the other end of the resistor R26 is electrically connected to pin 1 of the second noise pickup sensor, and the second adaptive filter group and the fourth adaptive filter group are connected in series between the other end of the resistor R26 and the input end of the second amplification module.

[0033] Further, the first adaptive filter group includes a capacitor 1C11, a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4 and a resistor R1, a resistor R2, a resistor R3, and a resistor R4;

[0034] The third adaptive filter group includes capacitor 1C1, MOS transistor Q9, MOS transistor Q10, MOS transistor Q11, MOS transistor Q12 and resistors R9, resistor R10, resistor R11, resistor R12;

[0035] The second adaptive filter group includes capacitor 1C12, MOS transistor Q5, MOS transistor Q6, MOS transistor Q7, MOS transistor Q8 and resistors R5, R6, R7 and R8;

[0036] The fourth adaptive filter group includes capacitor 1C4, MOS transistor Q13, MOS transistor Q14, MOS transistor Q15, MOS transistor Q16 and resistors R13, R14, R15, and R16;

[0037] The resistors R1, R2, R3 and R4 are sequentially connected in series between the other end of the resistor R25 and one end of the capacitor 1C1, and the other end of the capacitor 1C1 is electrically connected to the input end of the first amplification module; the source and drain of the MOS tube Q1 are electrically connected to the two ends of the resistor R1; the source and drain of the MOS tube Q2 are electrically connected to the two ends of the resistor R2; the source and drain of the MOS tube Q3 are electrically connected to the two ends of the resistor R3; the source and drain of the MOS tube Q4 are electrically connected to the two ends of the resistor R4; the gates of the MOS tubes Q1, Q2, Q3 and Q4 are all electrically connected to the control communication module;

[0038] The resistor R9, the resistor R10, the resistor R11 and the resistor R12 are sequentially connected in series between the other end of the capacitor 1C1 and the ground; the source and the drain of the MOS tube Q9 are electrically connected to the two ends of the resistor R9; the source and the drain of the MOS tube Q10 are electrically connected to the two ends of the resistor R10; the source and the drain of the MOS tube Q11 are electrically connected to the two ends of the resistor R11; the source and the drain of the MOS tube Q12 are electrically connected to the two ends of the resistor R12; the gates of the MOS tubes Q9, Q10, Q11 and Q12 are all electrically connected to the control communication module;

[0039] The resistors R5, R6, R7 and R8 are sequentially connected in series between the other end of the resistor R26 and one end of the capacitor 1C4, and the other end of the capacitor 1C4 is electrically connected to the input end of the second amplification module; the source and drain of the MOS tube Q5 are electrically connected to the two ends of the resistor R5; the source and drain of the MOS tube Q6 are electrically connected to the two ends of the resistor R6; the source and drain of the MOS tube Q7 are electrically connected to the two ends of the resistor R7; the source and drain of the MOS tube Q8 are electrically connected to the two ends of the resistor R8; the gates of the MOS tubes Q5, Q6, Q7 and Q8 are all electrically connected to the control communication module;

[0040] The resistor R13, the resistor R14, the resistor R15 and the resistor R16 are sequentially connected in series between the other end of the capacitor 1C4 and the ground; the source and the drain of the MOS tube Q13 are electrically connected to the two ends of the resistor R13; the source and the drain of the MOS tube Q14 are electrically connected to the two ends of the resistor R14; the source and the drain of the MOS tube Q15 are electrically connected to the two ends of the resistor R15; the source and the drain of the MOS tube Q16 are electrically connected to the two ends of the resistor R16; the gates of the MOS tubes Q13, Q14, Q15 and Q16 are all electrically connected to the control communication module.

[0041] Further, the noise threshold setting module includes an operational amplifier U3B, a resistor 1R11, a capacitor 1C10, a capacitor 1C13 and a fifth adaptive filter group;

[0042] The control communication module includes a control chip U1;

[0043] The reverse input terminal of the operational amplifier U3B is electrically connected to the output terminal of the environmental noise elimination module; the non-inverting input terminal of the operational amplifier U3B is electrically connected to the resistor 1R11, the capacitor 1C13 and one end of the fifth adaptive filter group, and the other end of the resistor 1R11 and the power supply terminal of the operational amplifier U3B are both electrically connected to the power supply module; the output terminal of the operational amplifier U3B is electrically connected to one end of the capacitor 1C10 and the pin 6 of the control chip U1, and the other end of the fifth adaptive filter group, the other end of the capacitor 1C13, the other end of the capacitor 1C10 and the ground terminal of the operational amplifier U3B are all grounded;

[0044] The fifth adaptive filter group includes MOS transistor Q17, MOS transistor Q18, MOS transistor Q19, MOS transistor Q20 and resistors R17, R18, R19, and R20;

[0045] The resistor R17, the resistor R18, the resistor R19 and the resistor R20 are sequentially connected in series between the non-inverting input terminal of the operational amplifier U3B and the ground; the source and the drain of the MOS tube Q17 are electrically connected to the two ends of the resistor R17; the source and the drain of the MOS tube Q18 are electrically connected to the two ends of the resistor R18; the source and the drain of the MOS tube Q19 are electrically connected to the two ends of the resistor R19; the source and the drain of the MOS tube Q20 are electrically connected to the two ends of the resistor R20; the gates of the MOS tubes Q17, Q18, Q19 and Q20 are electrically connected to the pins 2, 3, 4 and 5 of the control chip respectively;

[0046] The pin 33 of the control chip U1 is electrically connected to the gates of the MOS transistors Q1 and Q5; the pin 32 of the control chip U1 is electrically connected to the gates of the MOS transistors Q2 and Q6; the pin 31 of the control chip U1 is electrically connected to the gates of the MOS transistors Q3 and Q7; the pin 30 of the control chip U1 is electrically connected to the gates of the MOS transistors Q4 and Q8;

[0047] Pin 29 of the control chip U1 is electrically connected to the gates of MOS transistors Q9 and Q13; pin 28 of the control chip U1 is electrically connected to the gates of MOS transistors Q10 and Q14; pin 27 of the control chip U1 is electrically connected to the gates of MOS transistors Q11 and Q15; pin 23 of the control chip U1 is electrically connected to the gates of MOS transistors Q12 and Q16;

[0048] Pin 25 of the control chip U1 is electrically connected to the power module, pin 1, pin 9, pin 24, pin 26 and pin 35 of the control chip U1 are all grounded, and pin 12 and pin 13 of the control chip are electrically connected to the host computer as a data sending interface and a data receiving port respectively.

[0049] After adopting the above technical solution, the present invention has the following advantages compared with the background technology:

[0050] The noise source of smart home devices is generally caused by the magnetic components and ceramic capacitors of the AC-DC part. The essential reason for the noise is that the power chip is designed to be in low-frequency control mode under low load, but the low frequency will fall into the audio range, thereby causing the frequency vibration of the audio range of peripheral devices, and finally leading to the generation of noise. The present invention connects the adaptive load module to the back end of the power supply, and the control module controls the maximum impedance value of the adaptive load, avoiding the frequency band of power supply noise while meeting the low power consumption, thereby reducing or eliminating the noise.

[0051] The present invention can perform targeted noise detection on different devices, so that the noise detection on each type of household device is more targeted and accurate.

[0052] The present invention provides a complete noise testing solution, which, in addition to the aforementioned noise detection circuit, also includes a device identification process, stores noise data, detection parameters of similar products, and noise reduction parameters, and adds them to a database to improve the efficiency of batch detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A flowchart of the noise reduction steps of the noise reduction method of the present invention;

[0054] Figure 2 It is another flowchart of the noise reduction step of the noise reduction method of the present invention;

[0055] Figure 3 A noise flow chart of a detection device of the noise reduction method of the present invention;

[0056] Figure 4 This is a block diagram of the components of the smart home device of the present invention;

[0057] Figure 5 A circuit diagram of the adaptive load module of the present invention;

[0058] Figure 6 This is a block diagram of the components of the smart home system of the present invention;

[0059] Figure 7 This is a block diagram of the noise detection front end of the present invention;

[0060] Figure 8 A circuit diagram of the noise detection front end of the present invention;

[0061] Fig. 9 A circuit diagram of the control chip of the present invention;

[0062] Fig.10 The circuit diagram of the first adaptive filter group of the present invention;

[0063] Fig.11 The circuit diagram of the second adaptive filter group of the present invention;

[0064] Fig.12 is a circuit diagram of the third adaptive filter group of the present invention;

[0065] Fig.13 is a circuit diagram of the fourth adaptive filter group of the present invention;

[0066] Fig.14 This is a circuit diagram of the fifth adaptive filter group described in the present invention. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0068] In addition, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0069] When an element is referred to as being “fixed to” or “disposed on” or “provided on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0070] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0071] Example 1

[0072] Please refer to Figure 1 As shown, this embodiment provides a noise reduction method for performing noise reduction processing on smart home devices to improve the problem of excessive noise caused by the use of high-speed switching power supplies in conventional smart home devices.

[0073] The specific noise reduction method includes a device configuration step and a noise reduction step.

[0074] Among them, the device configuration step includes configuring an adaptive load module and a control module in the device, the adaptive load module has an adjustable resistance, the adaptive load module is connected to the back end of the power module of the device, and the control module communicates externally and adjusts the resistance of the adaptive load module.

[0075] Configuring a noise detection front end: configuring a first noise pickup sensor, a first adaptive module, a second noise pickup sensor and a second adaptive module in the noise detection front end, wherein the first adaptive module sets a noise screening frequency of the first noise pickup sensor, and the second adaptive module sets a noise screening frequency of the second noise pickup sensor.

[0076] Please refer to the noise reduction process Figure 1 As shown, it includes:

[0077] A. Detect device noise and determine whether it exceeds a set threshold. If so, execute step B; if not, execute step C; wherein the first noise pickup sensor picks up environmental noise plus device noise, the second noise pickup sensor picks up environmental noise, the first adaptive module and the second adaptive module set the noise screening frequency according to the type of the device; the device noise is measured according to the pickup results of the first noise pickup sensor and the second noise pickup sensor;

[0078] B. Sending an abnormal signal to the control module, and the control module lowers the resistance value of the adaptive load module; thereafter, returning to step A;

[0079] C. Determine if qualified and output normal equipment.

[0080] That is, the present invention configures an adaptive load module with variable resistance at the rear end of the power module of the smart home device. After detecting noise, the control module gradually lowers the impedance value of the adaptive load module according to a certain gear, so that the adaptive load matches the maximum impedance value required for current noise elimination, while meeting low power consumption and avoiding the frequency band of power supply noise, thereby achieving noise reduction or elimination.

[0081] The adaptive load module with variable resistance value described in this embodiment is formed by connecting a number of resistors in series, and switches are connected in parallel to each resistor. The control module controls the on-off combination of each parallel switch to achieve resistance value change. In a feasible implementation, the parallel switch can be a MOS tube.

[0082] Specific examples of the adaptive load module are given in subsequent embodiments and will not be repeated in this embodiment.

[0083] In a preferred embodiment, please refer to Figure 2 As shown, step B specifically includes:

[0084] B1. Query the equipment database to determine whether there is a noise-resistance mapping table. If so, execute B2; if not, execute B4.

[0085] B2. Adjust the resistance of the adaptive load module according to the noise-resistance mapping table. If yes, go to B3; if no, go to B4.

[0086] B3, determine whether it is the first adjustment, if so, adjust the resistance of the adaptive load module according to the noise-resistance mapping table and return to step A, if not, enter B4;

[0087] B4. Lower the resistance of the adaptive load module, and then return to A.

[0088] That is, by recording the noise and the final resistance value set for the load, the adjustment process can be further simplified and the noise reduction efficiency can be improved. To avoid an endless loop, the device will be judged whether it has adjusted the resistance value of the adaptive load module. If not, if there is a corresponding mapping table, the resistance value is adjusted according to the mapping table. If so, the mapping table is ignored. After adjusting the resistance value of the adaptive load module, the device is tested for noise again until the threshold requirement is met. The mapping relationship between the corresponding original noise of the device and the final resistance value of the adaptive load module is recorded and stored or updated in the device database to obtain a noise-resistance mapping table.

[0089] Please refer to Figure 3 The steps of detecting device noise include:

[0090] A1. Identify the device type;

[0091] A2. Compare the device database to see if there is parameter information of the device. If yes, proceed to step A3; if not, proceed to step A4;

[0092] A3, calling the frequency band corresponding to the device to set the parameters of the first adaptive module, the second adaptive module and the noise threshold, adjusting the first adaptive module and the second adaptive module to adapt to the filtering frequency band of the current device; collecting the device noise and comparing it with the noise threshold, and then executing A5;

[0093] A4, start the frequency sweep setting for the first adaptive module and the second adaptive module, increase the impedance values ​​of the first adaptive module and the second adaptive module in sequence until the filter frequency band suitable for the current device is selected, collect the device noise and compare it with the noise threshold, and then execute A5;

[0094] A5, determine whether the equipment noise exceeds the noise threshold, if not, proceed to step A6, if exceeded, proceed to step A7;

[0095] A6, output normal equipment;

[0096] A7. Report device abnormality, store device abnormal frequency band data in the database, and output device abnormality signal.

[0097] That is, the present invention identifies the device type and determines whether the device database has noise information of the device. If so, the preset parameters are imported to set the circuit state. If not, the frequency sweep is started and the frequency band is cyclically set to the filtering frequency band suitable for the current device.

[0098] The first adaptive module and the second adaptive module are filters for implementing frequency band screening, and specific examples thereof are given in subsequent embodiments and will not be repeated here. The noise threshold is a set threshold for the device to allow qualified outflow.

[0099] Example 2

[0100] As a specific example of the noise reduction method described in Embodiment 1, this embodiment proposes a smart home device.

[0101] Please refer to Figure 4 As shown, it includes a power module 110, an adaptive load module 120 and a control module 130. The power module includes an interface protection circuit 111, a filter circuit 112, a rectifier circuit 113, and a DC-DC circuit 114 connected in sequence. The adaptive load module 120 is arranged at the rear end of the device power module 110, and the control module 130 is arranged at the rear end of the power module 110 to control and adjust the resistance value of the adaptive load module 120.

[0102] That is, the input end of the interface protection circuit 111 is connected to the AC power, the output end of the interface protection circuit 111 is electrically connected to the input end of the filter circuit 112, the output end of the filter circuit 112 is electrically connected to the input end of the rectifier circuit 113, and the output end of the rectifier circuit 113 is electrically connected to the input end of the DC-DC circuit.

[0103] The DC-DC module supplies power to the functional circuit module, the control module and the adaptive load module. The signal input end of the control module is wirelessly connected to the host computer, and the control end of the control module is electrically connected to the adaptive load module and the functional circuit module. The specific control method is described in Example 1, which will not be repeated here.

[0104] For details, please refer to Figure 5 As shown, the adaptive load module 120 includes a plurality of load groups connected in series, the load groups are connected in series between the power module and the ground, and the load groups include loads and switches connected in parallel. The control end of the switch is electrically connected to the control module, the control module is connected to the power module through a functional circuit, and controls the on and off of the switch, thereby controlling the load to access the circuit or short-circuit.

[0105] Specifically, in this embodiment, there are four load groups, wherein the loads include resistors R21, R22, R23, and R24; and the switch components include MOS tubes Q21, Q22, Q23, and Q24. The resistors R21, R22, R23, and R24 are sequentially connected in series between the power module and the ground of the smart home device. The source and drain of the MOS tube Q21 are electrically connected to the two ends of the resistor R21; the source and drain of the MOS tube Q22 are electrically connected to the two ends of the resistor R22; the source and drain of the MOS tube Q23 are electrically connected to the two ends of the resistor R23; and the source and drain of the MOS tube Q24 are electrically connected to the two ends of the resistor R24. The gates of the MOS tubes Q21, Q22, Q23, and Q24 are all electrically connected to the control module, and the control module is wirelessly connected to the host computer. The control module controls the on and off of MOS tubes Q21, MOS tubes Q22, MOS tubes Q23, and MOS tubes Q24 to form different on-off combinations, realize loads with fixed resistance intervals, set the maximum impedance value of the load, meet low power consumption, avoid the frequency band that generates power supply noise, and avoid vibration of peripheral devices, thereby reducing and eliminating noise.

[0106] The smart home devices described in this embodiment may include various control devices, controlled devices, sensors, and expansion devices, etc. Among them, the control devices may include gateways, switch panels, smart screen control devices, lighting control devices, curtain control devices, HVAC control devices, etc.; the controlled devices include lamps, home appliances, security, HVAC, etc.; the sensors include water immersion sensors, curtain infrared sensors, human presence sensors, sound and light alarms, gas sensors, door and window sensors, valve controllers, smoke sensors, etc.; the expansion devices include network expanders, interface expanders, etc.

[0107] Example 3

[0108] Please refer to Figure 6 As shown, the present invention also provides a smart home system, including a smart home device 100, a host computer 200 and a noise detection front end 300. The smart home device 100 is the smart home device described in Example 2, which will not be described in detail here. The host computer 200 is used to realize the communication between the smart home device 100 and the noise detection front end 300, and the noise detection front end 300 is used to detect the noise of the smart home device 100.

[0109] Specifically, please refer to Figure 7As shown, the noise detection front end 300 includes a first noise pickup sensor 310, a second noise pickup sensor 320, a first adaptive module 330, a second adaptive module 340, a first amplification module 350, a second amplification module 360, an environmental noise elimination module 370, a noise threshold setting module 380 and a control communication module 390.

[0110] The first noise pickup sensor 310 picks up the environmental noise plus the equipment noise, and the second noise pickup sensor 320 picks up the environmental noise. The output ends of the first noise pickup sensor 310 and the second noise pickup sensor 320 are electrically connected to the input ends of the first adaptive module 330 and the second adaptive module 340 respectively. The first adaptive module 330 and the second adaptive module 340 adaptively set the screening frequency according to the device type, and set the noise frequency end in a targeted manner for the actual smart home device, which has higher noise detection accuracy. The output ends of the first adaptive module 330 and the second adaptive module 340 are electrically connected to the input ends of the first amplification module 350 and the second amplification module 360 ​​respectively. The output ends of the first amplification module 350 and the second amplification module 360 ​​are electrically connected to the input end of the environmental noise elimination module 370. The environmental noise elimination module 370 eliminates the environmental noise, so that the equipment noise signal is more prominent and is conducive to subsequent comparison processing. The output end of the environmental noise elimination module 370 is electrically connected to the input end of the noise threshold setting module 380. The output end of the noise threshold setting module 380 is electrically connected to the control communication module 390. The noise threshold setting module 380 sets the noise threshold according to the actual application scenario requirements of the smart home device, compares the device noise with the noise threshold, and transmits the comparison information to the control communication module 390. The control end of the control communication module 390 is electrically connected to the first adaptive module 330, the second adaptive module 340 and the noise threshold setting module 380. The control communication module 390 sets the screening frequency of the first adaptive module 330, the second adaptive module 340 and the noise threshold setting module 380. The control communication module 390 is wirelessly connected to the host computer, and the control communication module 390 transmits the noise information to the external alarm system or other detection system through the host computer.

[0111] Please refer to Figure 8-14 As shown, specifically, the first adaptive module 330 includes a resistor R25 and a first adaptive filter group and a third adaptive filter group; the second adaptive module 340 includes a resistor R26 and a second adaptive filter group and a fourth adaptive filter group.

[0112] One end of the resistor R25 is electrically connected to the power module, the other end of the resistor R25 is electrically connected to pin 1 of the first noise pickup sensor 310, and the first adaptive filter group and the third adaptive filter group are connected in series between the other end of the resistor R25 and the input end of the first amplification module 350.

[0113] One end of the resistor R26 is electrically connected to the power module, the other end of the resistor R26 is electrically connected to pin 1 of the second noise pickup sensor 320, and the second adaptive filter group and the fourth adaptive filter group are connected in series between the other end of the resistor R26 and the input end of the second amplification module 360.

[0114] Specifically, the first adaptive filtering group includes capacitor 1C11, MOS transistor Q1, MOS transistor Q2, MOS transistor Q3, MOS transistor Q4 and resistor R1, resistor R2, resistor R3, resistor R4; the third adaptive filtering group includes capacitor 1C1, MOS transistor Q9, MOS transistor Q10, MOS transistor Q11, MOS transistor Q12 and resistor R9, resistor R10, resistor R11, resistor R12; the second adaptive filtering group includes capacitor 1C12, MOS transistor Q5, MOS transistor Q6, MOS transistor Q7, MOS transistor Q8 and resistor R5, resistor R6, resistor R7, resistor R8; the fourth adaptive filtering group includes capacitor 1C4, MOS transistor Q13, MOS transistor Q14, MOS transistor Q15, MOS transistor Q16 and resistor R13, resistor R14, resistor R15, resistor R16.

[0115] The resistor R1, the resistor R2, the resistor R3 and the resistor R4 are connected in series between the other end of the resistor R25 and one end of the capacitor 1C1, and the other end of the capacitor 1C1 is electrically connected to the input end of the first amplification module 350; the source and the drain of the MOS transistor Q1 are electrically connected to the two ends of the resistor R1. The source and the drain of the MOS transistor Q2 are electrically connected to the two ends of the resistor R2; the source and the drain of the MOS transistor Q3 are electrically connected to the two ends of the resistor R3; the source and the drain of the MOS transistor Q4 are electrically connected to the two ends of the resistor R4; the gates of the MOS transistors Q1, Q2, Q3 and Q4 are all electrically connected to the control communication module 390.

[0116] Resistors R9, R10, R11 and R12 are connected in series between the other end of capacitor 1C1 and ground. The source and drain of MOS transistor Q9 are electrically connected to the two ends of resistor R9; the source and drain of MOS transistor Q10 are electrically connected to the two ends of resistor R10; the source and drain of MOS transistor Q11 are electrically connected to the two ends of resistor R11; the source and drain of MOS transistor Q12 are electrically connected to the two ends of resistor R12. The gates of MOS transistor Q9, MOS transistor Q10, MOS transistor Q11 and MOS transistor Q12 are all electrically connected to the control communication module 390.

[0117] Resistors R5, R6, R7 and R8 are connected in series between the other end of resistor R26 and one end of capacitor 1C4, and the other end of capacitor 1C4 is electrically connected to the input end of the second amplification module 360. The source and drain of MOS transistor Q5 are electrically connected to the two ends of resistor R5; the source and drain of MOS transistor Q6 are electrically connected to the two ends of resistor R6; the source and drain of MOS transistor Q7 are electrically connected to the two ends of resistor R7; the source and drain of MOS transistor Q8 are electrically connected to the two ends of resistor R8. The gates of MOS transistor Q5, MOS transistor Q6, MOS transistor Q7 and MOS transistor Q8 are all electrically connected to the control communication module 390.

[0118] Resistor R13, resistor R14, resistor R15 and resistor R16 are connected in series between the other end of capacitor 1C4 and ground. The source and drain of MOS transistor Q13 are electrically connected to the two ends of resistor R13; the source and drain of MOS transistor Q14 are electrically connected to the two ends of resistor R14; the source and drain of MOS transistor Q15 are electrically connected to the two ends of resistor R15; the source and drain of MOS transistor Q16 are electrically connected to the two ends of resistor R16. The gates of MOS transistor Q13, MOS transistor Q14, MOS transistor Q15 and MOS transistor Q16 are all electrically connected to the control communication module 390.

[0119] Specifically, the first amplifying module 350 includes an operational amplifier U1A, resistors 1R2, 1R3, 1R15, capacitors 1C2, 1C7. The second amplifying module 360 ​​includes an operational amplifier U2A, resistors 1R5, 1R6, 1R17, capacitors 1C6, 1C8.

[0120] The other end of capacitor 1C1 and one end of resistor R9 are electrically connected to the reverse input end of operational amplifier U1A, one end of resistor 1R15 and one end of capacitor 1C2, the same-direction input end of operational amplifier U1A is electrically connected to one end of resistor 1R2 and resistor 1R3, and the other end of resistor 1R2 and the power supply end of operational amplifier U1A are electrically connected to the power supply module. The output end of operational amplifier U1A is electrically connected to the other end of resistor 1R15, the other end of capacitor 1C2 and one end of capacitor 1C7, and is electrically connected to the first input end of environmental noise elimination module 370. The ground end of operational amplifier U1A, the other end of resistor 1R3 and the other end of capacitor 1C7 are all grounded.

[0121] The other end of capacitor 1C4 and one end of resistor R13 are electrically connected to the reverse input end of operational amplifier U2A, one end of resistor 1R17 and one end of capacitor 1C6, the same direction input end of operational amplifier U2A is electrically connected to resistor 1R5 and one end of resistor 1R6, and the other end of resistor 1R5 and the power supply end of operational amplifier U2A are electrically connected to the power supply module. The output end of operational amplifier U2A is electrically connected to the other end of resistor 1R17, the other end of capacitor 1C6 and one end of capacitor 1C8, and is electrically connected to the second input end of environmental noise elimination module 370. The ground end of operational amplifier U2A, the other end of resistor 1R6 and the other end of capacitor 1C8 are all grounded. Operational amplifier U1A and operational amplifier U2A amplify environmental noise plus equipment noise and equipment noise and transmit the value to environmental noise elimination module 370 to eliminate environmental noise.

[0122] The environmental noise elimination module 370 includes an operational amplifier U2B, a resistor 1R7 , a resistor 1R8 , a resistor 1R9 , a resistor 1R10 , and a capacitor 1C9 .

[0123] One end of the resistor 1R7 is electrically connected to the output end of the operational amplifier U1A, and the other end of the resistor 1R7 is electrically connected to the reverse input end of the operational amplifier U2B and one end of the resistor 1R10. One end of the resistor 1R8 is electrically connected to the output end of the operational amplifier U2A, and the other end of the resistor 1R8 is electrically connected to the same direction input end of the operational amplifier U2B and one end of the resistor 1R9. The power supply end of the operational amplifier U2B is electrically connected to the power supply module. The output end of the operational amplifier U2B is electrically connected to the other end of the resistor 1R10, one end of the capacitor 1C9, and is electrically connected to the input end of the noise threshold setting module 380. The ground end of the operational amplifier U2B and the other ends of the capacitor 1C9 and the resistor 1R9 are all grounded.

[0124] The noise threshold setting module 380 includes an operational amplifier U3B, a resistor 1R11, a capacitor 1C10, a capacitor 1C13 and a fifth adaptive filter group. The control communication module 390 includes a control chip U1. In this embodiment, the model of the control chip U1 is MG21A020F768IM32.

[0125] The reverse input terminal of the operational amplifier U3B is electrically connected to the output terminal of the environmental noise elimination module 370, and specifically, the output terminal of the operational amplifier U2B is electrically connected to the reverse input terminal of the operational amplifier U3B. The in-phase input terminal of the operational amplifier U3B is electrically connected to the resistor 1R11, the capacitor 1C13 and one end of the fifth adaptive filter group, and the other end of the resistor 1R11 and the power supply terminal of the operational amplifier U3B are both electrically connected to the power module. The output terminal of the operational amplifier U3B is electrically connected to one end of the capacitor 1C10 and the pin 6 of the control chip U1. The other end of the fifth adaptive filter group, the other end of the capacitor 1C13, the other end of the capacitor 1C10 and the ground terminal of the operational amplifier U3B are all grounded.

[0126] The fifth adaptive filter group includes MOS transistor Q17, MOS transistor Q18, MOS transistor Q19, MOS transistor Q20 and resistors R17, R18, R19, and R20.

[0127] Resistors R17, R18, R19 and R20 are connected in series between the non-inverting input terminal of operational amplifier U3B and ground. The source and drain of MOS tube Q17 are electrically connected to the two ends of resistor R17; the source and drain of MOS tube Q18 are electrically connected to the two ends of resistor R18; the source and drain of MOS tube Q19 are electrically connected to the two ends of resistor R19; the source and drain of MOS tube Q20 are electrically connected to the two ends of resistor R20. The gates of MOS tube Q17, MOS tube Q18, MOS tube Q19 and MOS tube Q20 are electrically connected to pin 2, pin 3, pin 4 and pin 5 of the control chip respectively.

[0128] In this embodiment, the resistance values ​​of the resistors R1-R4 of the first adaptive group are set to 8KΩ, 4KΩ, 2KΩ and 1KΩ respectively, and different resistors are connected to the circuit according to the on-off of the MOS tubes Q1-Q4. The combination of the on-off of different MOS tubes realizes the change of the total resistance value from 0-15KΩ, and forms filters of different frequency bands after being combined with the capacitors in the first adaptive module 330 to filter the frequencies of different frequency bands, wherein the first adaptive group and the third adaptive group respectively form high-pass filters and low-pass filters, corresponding to the upper limit frequency and lower limit frequency of the product, to filter the specific frequency band of the product, and the second adaptive group and the fourth adaptive group respectively form high-pass filters and low-pass filters, corresponding to the upper limit frequency and lower limit frequency of the product, to filter the specific frequency band of the product. For example, the selected capacitance value is f=1 / 2πRC, C=7.95uF, and the commonly used series value 8.2uF is taken, then the frequency can be changed from 1.3-19.4kHZ. Similarly, the second adaptive group, the third adaptive group, the fourth adaptive group, and the fifth adaptive filter group play the same role, and more combinations of resistors and MOS tubes can be set according to usage requirements.

[0129] Pin 33 of the control chip U1 is electrically connected to the gates of the MOS transistors Q1 and Q5; pin 32 of the control chip U1 is electrically connected to the gates of the MOS transistors Q2 and Q6; pin 31 of the control chip U1 is electrically connected to the gates of the MOS transistors Q3 and Q7; pin 30 of the control chip U1 is electrically connected to the gates of the MOS transistors Q4 and Q8.

[0130] Pin 29 of the control chip U1 is electrically connected to the gates of the MOS transistors Q9 and Q13; pin 28 of the control chip U1 is electrically connected to the gates of the MOS transistors Q10 and Q14; pin 27 of the control chip U1 is electrically connected to the gates of the MOS transistors Q11 and Q15; pin 23 of the control chip U1 is electrically connected to the gates of the MOS transistors Q12 and Q16.

[0131] Pin 25 of the control chip U1 is electrically connected to the power module, pin 1, pin 9, pin 24, pin 26 and pin 35 of the control chip U1 are all grounded, and pin 12 and pin 13 of the control chip are electrically connected to the host computer as a data sending interface and a data receiving port respectively.

[0132] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A noise reduction method, characterized in that: include: An adaptive load module and a control module are configured in the device, wherein the adaptive load module has an adjustable resistance value, the adaptive load module is connected to the rear end of the power module of the device, and the control module communicates externally and adjusts the resistance value of the adaptive load module; A first noise pickup sensor, a first adaptive module, a second noise pickup sensor and a second adaptive module are configured in the noise detection front end, the first adaptive module sets the noise screening frequency of the first noise pickup sensor, and the second adaptive module sets the noise screening frequency of the second noise pickup sensor; wherein the first noise pickup sensor picks up environmental noise plus equipment noise, the second noise pickup sensor picks up environmental noise, the first adaptive module and the second adaptive module set the noise screening frequency according to the type of the equipment; the equipment noise is measured according to the picking results of the first noise pickup sensor and the second noise pickup sensor; The noise detection front end detects the noise of the device and determines the state of the device noise according to a set threshold. When the device noise is abnormal, the noise detection front end sends an abnormal signal to the control module, and the control module controls the adaptive load module to lower the resistance value. Thereafter, the noise detection front end re-detects the noise of the device; The noise detection front end sends an abnormal signal to the control module, and the control module controls the adaptive load module to lower the resistance value, which also includes the following sub-steps: Query the device database. When the device database has a corresponding noise-resistance mapping table and it is the first time to adjust according to the noise-resistance mapping table saved in the device database, adjust the resistance of the adaptive load module according to the noise-resistance mapping table. When the device database does not have a corresponding noise-resistance mapping table or it is not the first time to adjust according to the noise-resistance mapping table saved in the device database, lower the resistance of the adaptive load module and re-detect the device noise.

2. The noise reduction method according to claim 1, characterized in that: The step of detecting the noise of the device by the noise detection front end further comprises the following sub-steps: The device type is identified and compared with the device parameters in the device database. When the device parameters exist in the device database, the frequency band corresponding to the device is called to set the parameters of the first adaptive module, the second adaptive module and the noise threshold, the first adaptive module and the second adaptive module are adjusted to adapt to the filter frequency band of the current device, and the device noise is collected and compared with the noise threshold; when the device parameters do not exist in the device database, the first adaptive module and the second adaptive module are started to sweep the frequency, the impedance values ​​of the first adaptive module and the second adaptive module are increased in sequence until the filter frequency band suitable for the current device is selected, and the device noise is collected and compared with the noise threshold; The state of the equipment noise is determined according to the set threshold. When the equipment noise is normal, it is judged as qualified and a normal device is output; when the equipment noise is abnormal, the equipment abnormality is reported, and the abnormal frequency band data of the equipment is stored in the database, and the noise detection front end sends an abnormal signal to the control module.

3. A smart home device, used to execute the noise reduction method according to any one of claims 1-2, characterized in that: include: Power module; An adaptive load module is arranged at the rear end of the device power supply, and includes a plurality of load groups, the load groups are connected in series between the power supply module and the ground, and the load groups include loads and switch elements connected in parallel with each other; The control module is electrically connected to the control end of the switch element, receives the abnormal signal and controls the on and off of the switch element, thereby controlling the load to be connected to the circuit or short-circuited.

4. The smart home device according to claim 3, characterized in that: There are four load groups, and the loads include resistors R21, R22, R23, and R24; the switch components include MOS transistors Q21, Q22, Q23, and Q24; The resistor R21, the resistor R22, the resistor R23 and the resistor R24 ​​are sequentially connected in series between the power module and the ground of the smart home device, the source and the drain of the MOS tube Q21 are electrically connected to the two ends of the resistor R21; the source and the drain of the MOS tube Q22 are electrically connected to the two ends of the resistor R22; the source and the drain of the MOS tube Q23 are electrically connected to the two ends of the resistor R23; the source and the drain of the MOS tube Q24 are electrically connected to the two ends of the resistor R24; the gates of the MOS tubes Q21, Q22, Q23 and Q24 are all electrically connected to the control module; The control module is connected to the host computer via wireless communication.

5. A smart home system, comprising a smart home device and a noise detection front end for detecting noise of the smart home device, characterized in that: The smart home device is the smart home device as described in any one of claims 3-4.

6. The smart home system according to claim 5, characterized in that: The noise detection front end includes a first noise pickup sensor, a second noise pickup sensor, a first adaptive module, a second adaptive module, a first amplification module, a second amplification module, an environmental noise elimination module, a noise threshold setting module and a control communication module; The first noise pickup sensor picks up environmental noise plus equipment noise, and the second noise pickup sensor picks up environmental noise. The output ends of the first noise pickup sensor and the second noise pickup sensor are electrically connected to the input ends of the first adaptive module and the second adaptive module respectively, and the output ends of the first adaptive module and the second adaptive module are electrically connected to the input ends of the first amplification module and the second amplification module respectively. The output ends of the first amplification module and the second amplification module are electrically connected to the input end of the environmental noise elimination module, the output end of the environmental noise elimination module is electrically connected to the input end of the noise threshold setting module, the output end of the noise threshold setting module is electrically connected to the control communication module, the control end of the control communication module is electrically connected to the first adaptive module, the second adaptive module and the noise threshold setting module, and the control communication module is wirelessly connected to the host computer.

7. The smart home system according to claim 6, characterized in that: The first adaptive module includes a resistor R25 and a first adaptive filter group and a third adaptive filter group; The second adaptive module includes a resistor R26, a second adaptive filter group, and a fourth adaptive filter group; One end of the resistor R25 is electrically connected to the power module, the other end of the resistor R25 is electrically connected to the pin 1 of the first noise pickup sensor, and the first adaptive filter group and the third adaptive filter group are connected in series between the other end of the resistor R25 and the input end of the first amplification module; One end of the resistor R26 is electrically connected to the power module, the other end of the resistor R26 is electrically connected to pin 1 of the second noise pickup sensor, and the second adaptive filter group and the fourth adaptive filter group are connected in series between the other end of the resistor R26 and the input end of the second amplification module.

8. The smart home system according to claim 7, characterized in that: The first adaptive filter group includes a capacitor 1C11, a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4, and a resistor R1, a resistor R2, a resistor R3, and a resistor R4; The third adaptive filter group includes capacitor 1C1, MOS transistor Q9, MOS transistor Q10, MOS transistor Q11, MOS transistor Q12 and resistors R9, resistor R10, resistor R11, resistor R12; The second adaptive filter group includes capacitor 1C12, MOS transistor Q5, MOS transistor Q6, MOS transistor Q7, MOS transistor Q8 and resistors R5, R6, R7 and R8; The fourth adaptive filter group includes capacitor 1C4, MOS transistor Q13, MOS transistor Q14, MOS transistor Q15, MOS transistor Q16 and resistors R13, R14, R15, and R16; The resistors R1, R2, R3 and R4 are sequentially connected in series between the other end of the resistor R25 and one end of the capacitor 1C1, and the other end of the capacitor 1C1 is electrically connected to the input end of the first amplification module; the source and drain of the MOS tube Q1 are electrically connected to the two ends of the resistor R1; the source and drain of the MOS tube Q2 are electrically connected to the two ends of the resistor R2; the source and drain of the MOS tube Q3 are electrically connected to the two ends of the resistor R3; the source and drain of the MOS tube Q4 are electrically connected to the two ends of the resistor R4; the gates of the MOS tubes Q1, Q2, Q3 and Q4 are all electrically connected to the control communication module; The resistor R9, the resistor R10, the resistor R11 and the resistor R12 are sequentially connected in series between the other end of the capacitor 1C1 and the ground; the source and the drain of the MOS tube Q9 are electrically connected to the two ends of the resistor R9; the source and the drain of the MOS tube Q10 are electrically connected to the two ends of the resistor R10; the source and the drain of the MOS tube Q11 are electrically connected to the two ends of the resistor R11; the source and the drain of the MOS tube Q12 are electrically connected to the two ends of the resistor R12; the gates of the MOS tubes Q9, Q10, Q11 and Q12 are all electrically connected to the control communication module; The resistors R5, R6, R7 and R8 are sequentially connected in series between the other end of the resistor R26 and one end of the capacitor 1C4, and the other end of the capacitor 1C4 is electrically connected to the input end of the second amplification module; the source and drain of the MOS tube Q5 are electrically connected to the two ends of the resistor R5; the source and drain of the MOS tube Q6 are electrically connected to the two ends of the resistor R6; the source and drain of the MOS tube Q7 are electrically connected to the two ends of the resistor R7; the source and drain of the MOS tube Q8 are electrically connected to the two ends of the resistor R8; the gates of the MOS tubes Q5, Q6, Q7 and Q8 are all electrically connected to the control communication module; The resistor R13, the resistor R14, the resistor R15 and the resistor R16 are sequentially connected in series between the other end of the capacitor 1C4 and the ground; the source and the drain of the MOS tube Q13 are electrically connected to the two ends of the resistor R13; the source and the drain of the MOS tube Q14 are electrically connected to the two ends of the resistor R14; the source and the drain of the MOS tube Q15 are electrically connected to the two ends of the resistor R15; the source and the drain of the MOS tube Q16 are electrically connected to the two ends of the resistor R16; the gates of the MOS tubes Q13, Q14, Q15 and Q16 are all electrically connected to the control communication module.

9. The smart home system according to claim 6, characterized in that: The noise threshold setting module includes an operational amplifier U3B, a resistor 1R11, a capacitor 1C10, a capacitor 1C13 and a fifth adaptive filter group; The control communication module includes a control chip U1; The reverse input terminal of the operational amplifier U3B is electrically connected to the output terminal of the environmental noise elimination module; the non-inverting input terminal of the operational amplifier U3B is electrically connected to the resistor 1R11, the capacitor 1C13 and one end of the fifth adaptive filter group, and the other end of the resistor 1R11 and the power supply terminal of the operational amplifier U3B are both electrically connected to the power supply module; the output terminal of the operational amplifier U3B is electrically connected to one end of the capacitor 1C10 and the pin 6 of the control chip U1, and the other end of the fifth adaptive filter group, the other end of the capacitor 1C13, the other end of the capacitor 1C10 and the ground terminal of the operational amplifier U3B are all grounded; The fifth adaptive filter group includes MOS transistor Q17, MOS transistor Q18, MOS transistor Q19, MOS transistor Q20 and resistors R17, R18, R19, and R20; The resistor R17, the resistor R18, the resistor R19 and the resistor R20 are sequentially connected in series between the non-inverting input terminal of the operational amplifier U3B and the ground; the source and the drain of the MOS tube Q17 are electrically connected to the two ends of the resistor R17; the source and the drain of the MOS tube Q18 are electrically connected to the two ends of the resistor R18; the source and the drain of the MOS tube Q19 are electrically connected to the two ends of the resistor R19; the source and the drain of the MOS tube Q20 are electrically connected to the two ends of the resistor R20; the gates of the MOS tubes Q17, Q18, Q19 and Q20 are electrically connected to the pins 2, 3, 4 and 5 of the control chip respectively; The pin 33 of the control chip U1 is electrically connected to the gates of the MOS transistors Q1 and Q5; the pin 32 of the control chip U1 is electrically connected to the gates of the MOS transistors Q2 and Q6; the pin 31 of the control chip U1 is electrically connected to the gates of the MOS transistors Q3 and Q7; the pin 30 of the control chip U1 is electrically connected to the gates of the MOS transistors Q4 and Q8; Pin 29 of the control chip U1 is electrically connected to the gates of MOS transistors Q9 and Q13; pin 28 of the control chip U1 is electrically connected to the gates of MOS transistors Q10 and Q14; pin 27 of the control chip U1 is electrically connected to the gates of MOS transistors Q11 and Q15; pin 23 of the control chip U1 is electrically connected to the gates of MOS transistors Q12 and Q16; Pin 25 of the control chip U1 is electrically connected to the power module, pin 1, pin 9, pin 24, pin 26 and pin 35 of the control chip U1 are all grounded, and pin 12 and pin 13 of the control chip are electrically connected to the host computer as a data sending interface and a data receiving port respectively.

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