Ultrasonic tooth cleaning system and ultrasonic tooth cleaner

Abstract

The utility model provides an ultrasonic tooth cleaning system and an ultrasonic tooth cleaner, and relates to the technical field of electronic control, and the ultrasonic tooth cleaning system comprises a power control device and a power adjusting circuit. The power control device comprises a control module and a power detection module. Wherein the power detection module is used for acquiring the voltage increment of the piezoelectric transducer in real time; the control module is used for sending a corresponding control signal to the power adjustment circuit when the voltage increment difference value between adjacent sampling moments meets any voltage increment threshold value, so that the power adjustment circuit outputs corresponding output power according to the current control signal, and the power of the ultrasonic tooth cleaning system is changed. On the basis, according to the ultrasonic tooth cleaning scheme provided by the utility model, the power gear can be automatically adjusted, the operation difficulty of a user is reduced, the working efficiency is improved, and the applicability of the ultrasonic tooth cleaner is improved.

Description

Technical Field

[0001] This utility model relates to the field of electronic control technology, and in particular to an ultrasonic dental cleaning system and ultrasonic dental cleaning machine. Background Technology

[0002] With the development of oral care technology, dental scalers have become an indispensable tool in modern dental clinics. The main function of a dental scaler is to remove tartar and stains from the tooth surface through high-frequency vibrations, thereby achieving the purpose of cleaning teeth. Existing dental scalers typically have multiple power levels, which operators manually adjust according to different cleaning needs.

[0003] For example, during the operation of a dental scaler, high-load conditions (such as hard tartar and stains) frequently occur. If the power setting of the scaler is too low, it may fail to remove tartar or require a longer operation time, thus affecting the user's efficiency. Conversely, if the power setting is too high, although it can remove tartar faster, it may also cause unnecessary damage to the tooth surface in an instant. Therefore, the operator needs to manually adjust it in time to avoid unnecessary damage. However, the above operating methods greatly increase the complexity of operation for the operator. Utility Model Content

[0004] The purpose of this invention is to provide an ultrasonic scaling system and ultrasonic scaling machine that can automatically adjust the power level, reduce the difficulty of operation for users, and improve the applicability of the ultrasonic scaling machine.

[0005] In a first aspect, this utility model provides an ultrasonic teeth cleaning system, which includes a piezoelectric transducer, a power control device, and a power adjustment circuit. The power control device includes a control module and a power detection module. The output terminal of the piezoelectric transducer is connected to the input terminal of the power detection module, the output terminal of the power detection module is connected to the input terminal of the control module, and the control module is also connected to the control terminal of the power adjustment circuit. The output terminal of the power adjustment circuit is connected to the input terminal of the piezoelectric transducer.

[0006] Among them, the power detection module is used to acquire the voltage increment of the piezoelectric transducer in real time;

[0007] The control module is used to send a corresponding control signal to the power adjustment circuit when the voltage increment difference between adjacent sampling times meets any voltage increment threshold.

[0008] The power adjustment circuit is used to output the corresponding power according to the current control signal, so as to change the power of the ultrasonic scaling system.

[0009] Optionally, the power detection module includes a voltage acquisition unit and a filtering component. The input terminal of the voltage acquisition unit serves as the input terminal of the power detection module and is connected to the positive output terminal and the negative output terminal of the piezoelectric transducer. The output terminal of the voltage acquisition unit is connected to the input terminal of the filtering component. The output terminal of the filtering component serves as the output terminal of the power detection module and is connected to the input terminal of the control module.

[0010] The voltage acquisition unit is used to acquire the AC voltage increment of the piezoelectric transducer and convert the AC voltage increment into an initial voltage increment.

[0011] The filtering component is used to filter out interference signals in the initial voltage increment to obtain the voltage increment.

[0012] Optionally, the control module further includes a calculation unit and a limiting unit. The input terminal of the calculation unit is connected to the output terminal of the voltage acquisition unit, the output terminal of the calculation unit is connected to the input terminal of the limiting unit, and the output terminal of the limiting unit is connected to the control terminal of the power adjustment circuit.

[0013] The calculation unit is used to determine the voltage increment difference between adjacent sampling times;

[0014] The limiting unit is used to send a corresponding first control signal to the power adjustment circuit when the voltage increment difference meets any voltage increment threshold, so that the power adjustment circuit outputs the corresponding output power according to the current control signal; wherein the output power is less than or equal to the preset maximum power.

[0015] The limiting unit is also used to send a second control signal to the power adjustment circuit when the output power exceeds the preset maximum power value, so that the power adjustment circuit stops working.

[0016] Optionally, the voltage acquisition unit includes a voltage divider circuit and an AC-DC conversion unit. The input terminal of the voltage divider circuit serves as the input terminal of the power detection module and is connected to the positive output terminal and the negative output terminal of the piezoelectric transducer. The output terminal of the voltage divider circuit is connected to the input terminal of the AC-DC conversion unit, and the output terminal of the AC-DC conversion unit is connected to the input terminal of the filter component.

[0017] Among them, the voltage divider circuit is used to obtain the AC voltage increment of the piezoelectric transducer;

[0018] The AC-DC conversion unit is used to convert AC voltage increment into DC voltage signal to obtain the initial voltage increment.

[0019] Optionally, the voltage acquisition unit includes a transformer, a first resistor, a second resistor, and a first diode; the primary side of the transformer is connected to an AC power supply; the first output terminal of the secondary side of the transformer is connected to the first end of the first resistor, and the second output terminal of the secondary side of the transformer is connected to the negative terminal of the first diode; the first end of the first resistor is connected to the positive output terminal of the piezoelectric transducer; the first end of the second resistor serves as the positive output terminal of the voltage acquisition unit and is connected to the first end of the first resistor and the positive input terminal of the filter component; the second end of the second resistor serves as the negative output terminal of the voltage acquisition unit and is connected to the positive terminal of the first diode and the negative input terminal of the filter component; the negative terminal of the first diode is connected to the negative output terminal of the piezoelectric transducer.

[0020] Optionally, the filtering component may further include a first filtering unit, a differential amplifier circuit, and a second filtering unit;

[0021] The input terminal of the first filter unit is connected to the output terminal of the AC-DC conversion unit; the output terminal of the first filter unit is connected to the input terminal of the differential amplifier circuit; the output terminal of the differential amplifier circuit is connected to the input terminal of the second filter unit; and the output terminal of the second filter unit is connected to the control module.

[0022] The first filtering unit is used to filter out interference signals in the initial voltage increment to obtain the first DC increment;

[0023] A differential amplifier circuit is used to amplify the first DC increment to obtain the second DC increment.

[0024] The second filtering unit is used to convert the second DC increment into a voltage increment for the control module to obtain.

[0025] Optionally, the differential amplifier circuit includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, and an operational amplifier. The first terminal of the third resistor serves as the positive input terminal of the differential amplifier circuit and is connected to the positive output terminal of the first filter unit. The second terminal of the third resistor is connected to the positive terminal of the operational amplifier and the first terminal of the fourth resistor. The second terminal of the fourth resistor is grounded. The first terminal of the fifth resistor serves as the negative input terminal of the differential amplifier circuit and is connected to the negative output terminal of the first filter unit. The second terminal of the fifth resistor is connected to the negative terminal of the operational amplifier and the first terminal of the sixth resistor. The second terminal of the sixth resistor is connected to the output terminal of the operational amplifier. The output terminal of the operational amplifier also serves as the output terminal of the differential amplifier circuit and is connected to the input terminal of the second filter unit.

[0026] Optionally, the first filter unit includes a first inductor, a second inductor, a first capacitor, a second capacitor, and a third capacitor; the first end of the first inductor is connected to the positive output terminal of the AC-DC conversion unit, and the second end is connected to the first terminal of the first capacitor, the first terminal of the second capacitor, and the first terminal of the third capacitor, respectively; the first end of the second inductor is connected to the negative output terminal of the AC-DC conversion unit, and the second end is connected to the second terminal of the first capacitor, the second terminal of the second capacitor, and the second terminal of the third capacitor, respectively; the first end of the third capacitor is also connected to the positive input terminal of the differential amplifier circuit; the second end of the third capacitor is also connected to the negative input terminal of the differential amplifier circuit.

[0027] Optionally, the second filter unit includes a seventh resistor, an eighth resistor, a ninth resistor, a fourth capacitor, a fifth capacitor, and a sixth capacitor; the first end of the seventh resistor serves as the input terminal of the second filter unit and is connected to the output terminal of the differential amplifier circuit; the second end of the seventh resistor is connected to the first end of the eighth resistor and the first end of the fourth capacitor; the second end of the fourth capacitor is grounded; the second end of the eighth resistor is connected to the first end of the ninth resistor and the first end of the fifth capacitor; the second end of the fifth capacitor is grounded; the second end of the ninth resistor is connected to the first end of the sixth capacitor; the second end of the sixth capacitor is grounded; the second end of the ninth resistor also serves as the output terminal of the second filter unit and is connected to the control module.

[0028] Secondly, this utility model also provides an ultrasonic dental scaler, including the ultrasonic dental scaler system described in any one of the first aspects above.

[0029] The light source control device and endoscope system provided by this utility model have the following beneficial effects:

[0030] This invention provides an ultrasonic scaling system and an ultrasonic scaling machine. The ultrasonic scaling system includes a power control device and a power adjustment circuit. The power control device includes a control module and a power detection module. The power detection module is used to acquire the voltage increment of the piezoelectric transducer in real time. The control module is used to send a corresponding control signal to the power adjustment circuit when the voltage increment difference between adjacent sampling times meets any voltage increment threshold, so that the power adjustment circuit outputs a corresponding output power according to the current control signal, thereby changing the power of the ultrasonic scaling system. Based on this, this invention provides an ultrasonic scaling solution that can automatically adjust the power level, reduce the user's operating difficulties, and improve the applicability of the ultrasonic scaling machine. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the ultrasonic teeth cleaning system provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the control module in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the power detection module in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the voltage acquisition unit in an embodiment of the present invention;

[0036] Figure 5 This is a circuit diagram of the voltage acquisition unit in an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the structure of the filter component in an embodiment of the present invention;

[0038] Figure 7 This is one of the circuit schematic diagrams of the filtering component in the embodiments of this utility model;

[0039] Figure 8 This is the second circuit schematic diagram of the filter component in this utility model embodiment;

[0040] Figure 9 This is the third circuit schematic diagram of the filter component in this utility model embodiment.

[0041] Icons: 10-Ultrasonic scaling system; 100-Piezoelectric transducer; 200-Power control device; 201-Control module; 202-Power detection module; 301-Calculation unit; 302-Limiting unit; 303-Voltage acquisition unit; 304-Filtering component; 401-Voltage divider circuit; 402-AC-DC conversion unit; 403-First filter unit; 404-Differential amplifier circuit; 405-Second filter unit; 500-Power adjustment circuit.

[0042] T1 - Transformer; R1 - First resistor; R2 - Second resistor; R3 - Third resistor; R4 - Fourth resistor; R5 - Fifth resistor; R6 - Sixth resistor; U1 - Operational amplifier; D1 - First diode; L1 - First inductor; L2 - Second inductor; C1 - First capacitor; C2 - Second capacitor; C3 - Third capacitor; R7 - Seventh resistor; R8 - Eighth resistor; R9 - Ninth resistor; C4 - Fourth capacitor; C5 - Fifth capacitor; C6 - Sixth capacitor. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this utility model, it should be noted that the terms "first", "second", "third", etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0049] As described in the background section, existing dental scalers often feature power adjustment circuits that require manual adjustment by the user. For example, the output power of the power adjustment circuit can be manually adjusted via buttons to change the power of the dental scaler and achieve the desired cleaning effect. However, different users will encounter heavy loads (such as hard tartar or stains). If the power setting is set too low, the tartar may not be removed or the cleaning time may be too long, resulting in low user efficiency. If the power setting is set too high, it may damage the tooth surface at the moment the tartar is removed.

[0050] Based on this, the present invention provides an ultrasonic teeth cleaning solution that can automatically adjust the power level, reduce the difficulty of operation for users, and improve the applicability of ultrasonic teeth cleaning machines.

[0051] Please refer to Figure 1 , Figure 1 A schematic diagram of an ultrasonic dental cleaning system 10 is shown. The ultrasonic dental cleaning system 10 includes a piezoelectric transducer 100. In this embodiment, the ultrasonic dental cleaning system 10 also includes a power control device 200 and a power adjustment circuit 500. The power control device 200 includes a control module 201 and a power detection module 202. The output terminal of the piezoelectric transducer 100 is connected to the input terminal of the power detection module 202, and the output terminal of the power detection module 202 is connected to the input terminal of the control module 201. The control module 201 is also connected to the control terminal of the power adjustment circuit 500. The output terminal of the power adjustment circuit 500 is connected to the input terminal of the piezoelectric transducer 100.

[0052] The power detection module 202 is used to acquire the voltage increment of the piezoelectric transducer 100 in real time.

[0053] The control module 201 is used to send a corresponding control signal to the power adjustment circuit 500 when the voltage increment difference between adjacent sampling times meets any voltage increment threshold.

[0054] The power adjustment circuit 500 is used to output the corresponding output power according to the current control signal, so as to change the power of the ultrasonic scaling system.

[0055] In this embodiment, the control module 201 includes multiple operating states, each corresponding to a different voltage increment threshold. In one possible implementation, multiple voltage increment thresholds can be pre-stored in the control module 201. Each operating state of the control module 201 corresponds to a different control signal. When the voltage increment difference between adjacent sampling times meets the corresponding voltage increment threshold, the corresponding control signal is triggered, causing the power adjustment circuit 500 to output the corresponding output power. This changes the power of the ultrasonic scaling system 10 to adapt to the current load and achieve the purpose of scaling.

[0056] In this embodiment, the power detection module 202 acquires the voltage increment of the piezoelectric transducer 100 in real time. That is, within a sampling interval, including multiple consecutive sampling moments, the power detection module 202 acquires the voltage increment difference corresponding to multiple consecutive sampling moments within the sampling interval. The control module 201 then acquires the voltage increment difference between adjacent sampling moments based on the voltage increment difference corresponding to the above multiple consecutive sampling moments, so as to trigger the generation of the corresponding control signal.

[0057] It should be noted that this embodiment does not limit the control module 201 to acquiring the voltage increment difference between adjacent sampling times. In one possible implementation, the control module 201 in this embodiment may be, but is not limited to, any controller such as an MCU and a CPU. To further reduce the size of the ultrasonic scaler, the control module 201 in this embodiment may be a PIC microcontroller (PIC) series single-chip microcomputer.

[0058] In one possible implementation method, please Figure 1 Based on, refer to Figure 2 , Figure 2 The diagram shows the structure of the control module 201 in this embodiment. The control module 201 also includes a calculation unit 301 and a limiting unit 302. The input terminal of the calculation unit 301 is connected to the output terminal of the voltage acquisition unit 303, the output terminal of the calculation unit 301 is connected to the input terminal of the limiting unit 302, and the output terminal of the limiting unit 302 is connected to the control terminal of the power adjustment circuit 500.

[0059] In this embodiment, the calculation unit 301 is used to determine the voltage increment difference between adjacent sampling times.

[0060] The limiting unit 302 is used to send a corresponding first control signal to the power adjustment circuit 500 when the voltage increment difference meets any voltage increment threshold, so that the power adjustment circuit 500 outputs the corresponding output power according to the current control signal; wherein the output power is less than or equal to the preset maximum power value.

[0061] The limiting unit 302 is also used to send a second control signal to the power adjustment circuit 500 when the output power is greater than the preset maximum power value, so that the power adjustment circuit 500 stops working.

[0062] In this embodiment, after receiving the voltage increment transmitted by the power detection module 202, the control module 201 uses the calculation unit 301 to perform a simple subtraction calculation to determine the voltage increment difference between adjacent sampling times. After the limiting unit 302 obtains the voltage increment difference between adjacent sampling times, it filters out the working state corresponding to the current voltage increment difference and sends the corresponding control signal to the power adjustment circuit 500.

[0063] The voltage increment thresholds for each operating state are different. In one possible implementation, the voltage increment thresholds increase linearly. For example, when there are eight operating states, if the difference between the voltage increment thresholds is 1, and the voltage increment threshold for the first operating state is [1V, 2V), then the voltage increment threshold for the second operating state is [2V, 3V], ..., and the voltage increment threshold for the eighth operating state is [8V, 9V].

[0064] In one possible implementation, assume the voltage value at the current sampling moment is U. i The voltage value at the next sampling time is U j If the voltage difference between adjacent sampling times is ΔU=U i -U j If ΔU>0, it means that the output power needs to be increased at the next sampling time. If the absolute value of the voltage difference ΔU satisfies [2V, 3V), then the power adjustment circuit 500 needs to be switched to the corresponding working state.

[0065] Similarly, if the voltage difference ΔU between adjacent sampling times is less than 0, it means that the output power at the next sampling time needs to be reduced. If the absolute value of the voltage difference ΔU satisfies [1V, 2V), then the power adjustment circuit 500 needs to be switched to the corresponding working state.

[0066] In this embodiment, during continuous sampling monitoring, the operating state corresponding to the current sampling time can be used as a benchmark to evaluate the changes between the current sampling time and the next sampling time. In one possible implementation, the voltage increment threshold corresponding to each operating state under the control module 201 is different, and the corresponding operating range of the operating state is also different. This operating range can be determined by the benchmark value and the corresponding voltage threshold.

[0067] The following provides a specific implementation method for a control module:

[0068] Assuming 0V is the reference value of the current control module 201, if the voltage increment threshold corresponding to the first working state is [1V, 2V), then the working range of the first working state can be [1V, 2V); ...; Similarly, when the voltage increment threshold corresponding to the eighth working state is [8V, 9V), the working range of the eighth working state is [8V, 9V).

[0069] It should be noted that this embodiment does not limit the correspondence between the voltage increment threshold and the working range. It can be limited according to the applicable scenario. For example, when a PIC series microcontroller is selected, the above values ​​can be burned into the PIC series microcontroller through a computer.

[0070] Furthermore, when the sampling interval includes consecutive sampling times T1, T2, and T3, according to the above-mentioned setting method for each working state, if the voltage value at the current sampling time T1 is 1.5V, it is normally in the first working state, within the working range of 1V-2V. If the voltage value at the next sampling time is 5.1V, the voltage difference ΔU between the current adjacent sampling times is 3.6V. At this time, it is necessary to increase the working power to ensure working efficiency. Therefore, the working range corresponding to the next sampling time should theoretically be 4.6V-5.6V. Thus, it can be adjusted to the fifth working state, that is, it needs to be within the working range of 5V-6V.

[0071] In this embodiment, the amount of voltage increment change, i.e., the change in the voltage increment difference between adjacent sampling times, corresponds to the amount of power compensation achieved.

[0072] Since the power detection module continuously monitors the process, the 5.1V at sampling time T2 will be used as a reference to evaluate the transition between sampling time T2 and sampling time T3. If the voltage at sampling time T3 is 6.1V, the voltage difference ΔU between adjacent sampling times T2 and T3 is 1.0V, representing a 1V change in voltage increment. This changes the operating range to 6V-7V, at which point the power adjustment circuit 500 will be adjusted to the sixth operating state.

[0073] Similarly, if the voltage value corresponding to the subsequent sampling time T4 is 1.3V, and the voltage difference ΔU between adjacent sampling times is less than 0, then the output power of the power adjustment circuit 500 needs to be reduced. At this time, the voltage difference can be used to adjust the circuit from the sixth working state to the first working state.

[0074] In another possible implementation, to avoid abrupt adjustments to the operating states, adjustments can be made sequentially, state by state, according to the order of the operating range corresponding to each operating state. For example, if the voltage value at the current sampling time T1 is 1.5V and the voltage value at the next sampling time is 5.1V, adjustments can be made starting from the first operating state, then the second operating state, and gradually transitioning to the fifth operating state. Similarly, if the voltage value at the current sampling time T1 is 6.1V and the voltage value at the next sampling time is 1.3V, adjustments can be made starting from the sixth operating state, and gradually transitioning to the first operating state.

[0075] In this embodiment, under normal switching state, the output power of the power adjustment circuit 500 is less than the preset maximum power. When the output power exceeds the preset maximum power, for example, when the preset maximum power is 9W, if the output power is 9.5W, the limiting unit 302 will send a second control signal to the power adjustment circuit 500 to stop the power adjustment circuit 500 from working.

[0076] Similarly, when the output power is less than the preset minimum power value, the limiting unit 302 will also send a second control signal to the power adjustment circuit 500 to stop the power adjustment circuit 500 from working.

[0077] This embodiment does not limit the structure of the power detection module 202; in this embodiment, the power detection module 202 can be composed of simple electronic components. In one possible implementation, please... Figure 1 Based on, refer to Figure 3 , Figure 3 The diagram shows the structure of the power detection module 202 in this embodiment. The power detection module 202 includes a voltage acquisition unit 303 and a filter component 304. The input terminal of the voltage acquisition unit 303 serves as the input terminal of the power detection module 202 and is connected to the positive output terminal and the negative output terminal of the piezoelectric transducer 100. The output terminal of the voltage acquisition unit 303 is connected to the input terminal of the filter component 304. The output terminal of the filter component 304 serves as the output terminal of the power detection module 202 and is connected to the input terminal of the control module 201.

[0078] The voltage acquisition unit 303 is used to acquire the AC voltage increment of the piezoelectric transducer 100 and convert the AC voltage increment into an initial voltage increment.

[0079] The filter component 304 is used to filter out interference signals in the initial voltage increment to obtain the final voltage increment.

[0080] Please Figure 3 Based on, refer to Figure 4 , Figure 4 The diagram shows the structure of the voltage acquisition unit 303 in this embodiment. In this embodiment, the voltage acquisition unit 303 includes a voltage divider circuit 401 and an AC-DC conversion unit 402. The input terminal of the voltage divider circuit 401 serves as the input terminal of the power detection module 202 and is connected to the positive and negative output terminals of the piezoelectric transducer 100. The output terminal of the voltage divider circuit 401 is connected to the input terminal of the AC-DC conversion unit 402, and the output terminal of the AC-DC conversion unit 402 is connected to the input terminal of the filter component 304.

[0081] Among them, the voltage divider circuit 401 is used to obtain the AC voltage increment of the piezoelectric transducer 100.

[0082] The AC-DC conversion unit 402 is used to convert AC voltage increment into DC voltage signal to obtain the initial voltage increment.

[0083] In this embodiment, when the working head of the piezoelectric transducer 100 encounters a strong load (such as hard dental calculus) during operation, the voltage in the circuit will increase due to the vibration of the piezoelectric transducer 100 being blocked. At this time, the voltage across the voltage divider circuit 401 will increase. Since the operating voltage of the ultrasonic scaling system 10 is relatively small, usually around 30V, while the operating voltage of the piezoelectric transducer 100 is around 300V, a transformer T1 is usually set to turn on the piezoelectric transducer 100 to increase the 30V voltage to 300V. Based on this, the voltage across the voltage divider circuit 401 is an AC voltage signal, and an AC-DC conversion unit 402 needs to be set to convert the AC voltage signal into a DC voltage signal for the filter component 304 to convert.

[0084] Please Figure 3 Based on, refer to Figure 5 , Figure 5 The circuit diagram of the voltage acquisition unit 303 in this embodiment is shown. The voltage acquisition unit 303 includes a transformer T1, a first resistor R1, a second resistor R2, and a first diode D1. The primary side of the transformer T1 is connected to an AC power supply. The first output terminal of the secondary side of the transformer T1 is connected to the first terminal of the first resistor R1, and the second output terminal of the secondary side of the transformer T1 is connected to the negative terminal of the first diode D1. The first terminal of the first resistor R1 is connected to the positive output terminal of the piezoelectric transducer 100. The first terminal of the second resistor R2 serves as the positive output terminal of the voltage acquisition unit 303 and is connected to the first terminal of the first resistor R1 and the positive input terminal of the filter component 304. The second terminal of the second resistor R2 serves as the negative output terminal of the voltage acquisition unit 303 and is connected to the positive terminal of the first diode D1 and the negative input terminal of the filter component 304. The negative terminal of the first diode D1 is connected to the negative output terminal of the piezoelectric transducer 100.

[0085] In this embodiment, the first resistor R1 and the second resistor R2 constitute the voltage divider circuit 401. The voltage divider circuit 401 and the first diode D1 together constitute the AC-DC conversion unit 402, i.e., a single-phase half-wave rectifier circuit. The diode has single-phase conduction: forward conduction and reverse cutoff. At this time, the voltage across the second resistor R2 is an AC voltage signal. By connecting the rectifier diode D1 in series, the AC voltage signal can be converted into a pulsating DC voltage signal.

[0086] Please Figure 3 Based on, refer to Figure 6 , Figure 6 The diagram shows the structure of the filter component 304 in this embodiment. The filter component 304 also includes a first filter unit 403, a differential amplifier circuit 404, and a second filter unit 405.

[0087] The input terminal of the first filter unit 403 is connected to the output terminal of the AC-DC conversion unit 402; the output terminal of the first filter unit 403 is connected to the input terminal of the differential amplifier circuit 404; the output terminal of the differential amplifier circuit 404 is connected to the input terminal of the second filter unit 405; and the output terminal of the second filter unit 405 is connected to the control module 201.

[0088] The first filtering unit 403 is used to filter out interference signals in the initial voltage increment to obtain the first DC increment.

[0089] The differential amplifier circuit 404 is used to amplify the first DC increment to obtain the second DC increment.

[0090] The second filter unit 405 is used to convert the second DC increment into a voltage increment for the control module 201 to obtain.

[0091] In this embodiment, after obtaining the pulsating DC voltage signal transmitted by the AC-DC conversion unit 402, it can be converted by the filter component 304. For example, the pulsating DC voltage signal can be converted into a smooth DC voltage signal by the first filter unit 403. Since the smooth DC voltage signal is relatively weak, a differential amplifier circuit 404 can be set to amplify the signal. Then, the amplified DC signal is converted into a voltage signal that can be recognized by the ADC port of the PIC microcontroller, i.e., the voltage increment.

[0092] Please Figure 6 Based on, refer to Figure 7 , Figure 7 The circuit diagram of the differential amplifier circuit 404 in this embodiment is shown. The differential amplifier circuit 404 includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and an operational amplifier U1. The first terminal of the third resistor R3 serves as the positive input terminal of the differential amplifier circuit 404, connected to the positive output terminal of the first filter unit 403; the second terminal is connected to the positive terminal of the operational amplifier U1 and the first terminal of the fourth resistor R4. The second terminal of the fourth resistor R4 is grounded. The first terminal of the fifth resistor R5 serves as the negative input terminal of the differential amplifier circuit 404, connected to the negative output terminal of the first filter unit 403; the second terminal is connected to the negative terminal of the operational amplifier U1 and the first terminal of the sixth resistor R6. The second terminal of the sixth resistor R6 is connected to the output terminal of the operational amplifier U1. The output terminal of the operational amplifier U1 also serves as the output terminal of the differential amplifier circuit 404, connected to the input terminal of the second filter unit 405.

[0093] Please Figure 6 Based on, refer to Figure 8 , Figure 8The circuit diagram of the first filter unit 403 in this embodiment is shown. The first filter unit 403 includes a first inductor L1, a second inductor L2, a first capacitor C1, a second capacitor C2, and a third capacitor C3. The first end of the first inductor L1 is connected to the positive output terminal of the AC-DC conversion unit 402, and the second end is connected to the first ends of the first capacitor C1, the second capacitor C2, and the third capacitor C3, respectively. The first end of the second inductor L2 is connected to the negative output terminal of the AC-DC conversion unit 402, and the second end is connected to the second ends of the first capacitor C1, the second capacitor C2, and the third capacitor C3, respectively. The first end of the third capacitor C3 is also connected to the positive input terminal of the differential amplifier circuit 404, and the second end of the third capacitor C3 is also connected to the negative input terminal of the differential amplifier circuit 404.

[0094] Please Figure 6 Based on, refer to Figure 9 , Figure 9 The circuit diagram of the second filter unit 405 in this embodiment is shown. The second filter unit 405 includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6. The first end of the seventh resistor R7 serves as the input terminal of the second filter unit 405 and is connected to the output terminal of the differential amplifier circuit 404. The second end of the seventh resistor R7 is connected to the first end of the eighth resistor R8 and the first end of the fourth capacitor C4. The second end of the fourth capacitor C4 is grounded. The second end of the eighth resistor R8 is connected to the first end of the ninth resistor R9 and the first end of the fifth capacitor C5. The second end of the fifth capacitor C5 is grounded. The second end of the ninth resistor R9 is connected to the first end of the sixth capacitor C6. The second end of the sixth capacitor C6 is grounded. The second end of the ninth resistor R9 also serves as the output terminal of the second filter unit 405 and is connected to the control module 201.

[0095] In one possible implementation, the resistance values ​​of the third resistor R3 and the fifth resistor R5 are the same, and the resistance values ​​of the fourth resistor R4 and the sixth resistor R6 are the same. Based on this, the output voltage Uout corresponding to the second terminal of the ninth resistor R9 in this embodiment is Uout = R6 / R5*(U+ - U_).

[0096] Based on this, the present invention provides an ultrasonic scaling system and an ultrasonic scaling machine. The ultrasonic scaling system includes a power control device and a power adjustment circuit. The power control device includes a control module and a power detection module. The power detection module is used to acquire the voltage increment of the piezoelectric transducer in real time. The control module is used to send a corresponding control signal to the power adjustment circuit when the voltage increment difference between adjacent sampling times meets any voltage increment threshold, so that the power adjustment circuit outputs the corresponding output power according to the current control signal, thereby changing the power of the ultrasonic scaling system. Based on this, the present invention provides an ultrasonic scaling solution that can automatically adjust the power level, reduce the user's operating difficulties, and improve the applicability of the ultrasonic scaling machine.

[0097] Similar to the previous embodiment, this utility model also provides an ultrasonic scaler, including the ultrasonic scaler system described in any of the first aspects above, which reduces the user's operating difficulties and improves the applicability of the ultrasonic scaler by automatically adjusting the power level.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An ultrasonic dental cleaning system comprising a piezoelectric transducer, characterized by, The ultrasonic dental cleaning system further comprises a power control device and a power adjusting circuit; the power control device comprises a control module and a power detection module; an output end of the piezoelectric transducer is connected with an input end of the power detection module, an output end of the power detection module is connected with an input end of the control module, and the control module is further connected with a control end of the power adjusting circuit; and an output end of the power adjusting circuit is connected with an input end of the piezoelectric transducer; The power detection module is configured to acquire the voltage increment of the piezoelectric transducer in real time. The control module is configured to send a corresponding control signal to the power adjusting circuit when a voltage increment difference between adjacent sampling time points meets any voltage increment threshold. The power adjusting circuit is configured to output a corresponding output power according to the current control signal to change the power of the ultrasonic dental cleaning system.

2. The ultrasonic dental cleaning system of claim 1, wherein, The power detection module comprises a voltage acquisition unit and a filtering component; an input end of the voltage acquisition unit is connected with a positive output end of the piezoelectric transducer and a negative output end of the piezoelectric transducer as an input end of the power detection module; an output end of the voltage acquisition unit is connected with an input end of the filtering component; and an output end of the filtering component is connected with an input end of the control module as an output end of the power detection module. The voltage acquisition unit is configured to acquire an alternating voltage increment of the piezoelectric transducer and convert the alternating voltage increment into an initial voltage increment. The filtering component is configured to filter out interference signals in the initial voltage increment to obtain the voltage increment.

3. The ultrasonic dental cleaning system of claim 2, wherein, The control module further comprises a calculation unit and a limiting unit; an input end of the calculation unit is connected with an output end of the voltage acquisition unit, an output end of the calculation unit is connected with an input end of the limiting unit, and an output end of the limiting unit is connected with a control end of the power adjusting circuit. The calculation unit is configured to determine a voltage increment difference between adjacent sampling time points. The limiting unit is configured to send a corresponding first control signal to the power adjusting circuit when the voltage increment difference meets any voltage increment threshold, so that the power adjusting circuit outputs a corresponding output power according to the current control signal; and the output power is less than or equal to a preset maximum power. The limiting unit is further configured to send a second control signal to the power adjusting circuit when the output power is greater than the preset maximum power, so that the power adjusting circuit stops working.

4. The ultrasonic dental cleaning system of claim 2, wherein, The voltage acquisition unit comprises a voltage dividing circuit and an AC-DC conversion unit; an input end of the voltage dividing circuit is connected with a positive output end of the piezoelectric transducer and a negative output end of the piezoelectric transducer as an input end of the power detection module; an output end of the voltage dividing circuit is connected with an input end of the AC-DC conversion unit, and an output end of the AC-DC conversion unit is connected with an input end of the filtering component; The voltage dividing circuit is configured to acquire an alternating voltage increment of the piezoelectric transducer. The AC-DC conversion unit is configured to convert the alternating voltage increment into a direct current voltage signal to obtain an initial voltage increment.

5. The ultrasonic dental cleaning system of claim 2 or 4, wherein, The voltage acquisition unit comprises a transformer, a first resistor, a second resistor and a first diode; the primary side of the transformer is connected with an alternating current power supply; the first output end of the secondary side of the transformer is connected with the first end of the first resistor, and the second output end of the secondary side of the transformer is connected with the negative electrode end of the first diode; the first end of the first resistor is connected with the positive electrode output end of the piezoelectric transducer; the first end of the second resistor is connected with the first end of the first resistor and the positive electrode input end of the filtering assembly as the positive electrode output end of the voltage acquisition unit; the second end of the second resistor is connected with the positive electrode end of the first diode and the negative electrode input end of the filtering assembly as the negative electrode output end of the voltage acquisition unit; and the negative electrode end of the first diode is connected with the negative electrode output end of the piezoelectric transducer.

6. The ultrasonic dental cleaning system of claim 4, wherein, The filtering assembly further comprises a first filtering unit, a differential amplification circuit and a second filtering unit. The input end of the first filtering unit is connected with the output end of the alternating-to-direct current conversion unit; the output end of the first filtering unit is connected with the input end of the differential amplification circuit, the output end of the differential amplification circuit is connected with the input end of the second filtering unit, and the output end of the second filtering unit is connected with the control module. The first filtering unit is used for filtering out interference signals in the initial voltage increment to obtain a first direct current increment. The differential amplification circuit is used for amplifying the first direct current increment to obtain a second direct current increment. The second filtering unit is used for converting the second direct current increment into the voltage increment for the control module to acquire.

7. The ultrasonic dental system of claim 6, wherein, The differential amplification circuit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and an operational amplifier; the first end of the third resistor is connected with the positive electrode output end of the first filtering unit as the positive electrode input end of the differential amplification circuit, the second end of the third resistor is connected with the positive electrode end of the operational amplifier and the first end of the fourth resistor; the second end of the fourth resistor is grounded; the first end of the fifth resistor is connected with the negative electrode output end of the first filtering unit as the negative electrode input end of the differential amplification circuit, the second end of the fifth resistor is connected with the negative electrode end of the operational amplifier and the first end of the sixth resistor; the second end of the sixth resistor is connected with the output end of the operational amplifier; and the output end of the operational amplifier is also connected with the input end of the second filtering unit as the output end of the differential amplification circuit.

8. The ultrasonic dental system of claim 6, wherein, The first filter unit comprises a first inductor, a second inductor, a first capacitor, a second capacitor and a third capacitor; a first end of the first inductor is connected with the positive output end of the AC-DC conversion unit, and a second end thereof is connected with a first end of the first capacitor, a first end of the second capacitor and a first end of the third capacitor respectively; a first end of the second inductor is connected with the negative output end of the AC-DC conversion unit, and a second end thereof is connected with a second end of the first capacitor, a second end of the second capacitor and a second end of the third capacitor respectively; the first end of the third capacitor is further connected with the positive input end of the differential amplification circuit; and the second end of the third capacitor is further connected with the negative input end of the differential amplification circuit.

9. The ultrasonic dental system of claim 6, wherein, The second filter unit comprises a seventh resistor, an eighth resistor, a ninth resistor, a fourth capacitor, a fifth capacitor and a sixth capacitor; a first end of the seventh resistor is connected with the output end of the differential amplification circuit as an input end of the second filter unit; a second end of the seventh resistor is connected with a first end of the eighth resistor and a first end of the fourth capacitor respectively; a second end of the fourth capacitor is grounded; a second end of the eighth resistor is connected with a first end of the ninth resistor and a first end of the fifth capacitor respectively; a second end of the fifth capacitor is grounded; a second end of the ninth resistor is connected with a first end of the sixth capacitor; a second end of the sixth capacitor is grounded; and the second end of the ninth resistor is further connected with the control module as an output end of the second filter unit.

10. An ultrasonic dental scaler, characterized by, An ultrasonic dental cleaning system comprising the ultrasonic dental cleaning system of any one of claims 1 to 9.

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