Identity recognition system of ultrasonic scaler

Abstract

The utility model discloses an identity recognition system of an ultrasonic scaler. The identity recognition system comprises a control unit and the ultrasonic scaler, the ultrasonic tooth cleaner comprises a handle and a working head; the handle is provided with a handle information storage unit, and the handle information storage unit is used for storing first feature code information of the handle; the working head is provided with a working head information storage unit, and the working head information storage unit is used for storing second feature coding information of the working head; the control unit is electrically connected with the handle information storage unit and the working head information storage unit. The control unit comprises a preset feature code database; and the control unit is used for reading the first feature coding information and the second feature coding information after the working head and the handle are assembled, and outputting an electric signal to the working head to enable the working head to work when the first feature coding information and the second feature coding information are consistent with feature coding information in a preset feature coding database. By means of the system, accurate identification of the identity of the ultrasonic scaler is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ultrasonic dental cleaning machine technical field especially relates to an ultrasonic dental cleaning machine identity recognition system. BACKGROUND

[0002] With the improvement of oral health consciousness and the progress of medical technology, ultrasonic dental cleaning machine is more and more widely used in the field of oral medicine, especially in stomatology, dental prevention and other professional fields. At the same time, there are high imitation products of ultrasonic dental cleaning machine on the market, so that users use high imitation products as genuine products, which cannot clean teeth comprehensively and effectively, and may also cause damage to teeth, resulting in the decrease of users' trust in genuine ultrasonic dental cleaning machine.

[0003] In order to improve the anti-fake characteristics of ultrasonic dental cleaning machine and ensure the fitting degree between the handle and the working head of ultrasonic dental cleaning machine, it is urgent to add an identity recognition system to ultrasonic dental cleaning machine to realize accurate identification of the identity of ultrasonic dental cleaning machine under the premise of fitting the handle and the working head of ultrasonic dental cleaning machine. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of ultrasonic dental cleaning machine identity recognition system, to realize the accurate identification of ultrasonic dental cleaning machine identity, greatly improve the anti-fake effect and the fitting degree of ultrasonic dental cleaning machine, improve the experience of user.

[0005] The utility model provides a kind of ultrasonic dental cleaning machine identity recognition system, including control unit and ultrasonic dental cleaning machine;

[0006] Ultrasonic dental cleaning machine includes handle and working head;Handle is provided with handle information storage unit in, handle storage information unit is used to store the first characteristic code information of handle;Working head is provided with working head information storage unit in, working head information storage unit is used to store the second characteristic code information of working head;

[0007] Control unit is electrically connected with handle information storage unit and working head information storage unit respectively;Control unit includes preset characteristic code database;Control unit is used to read first characteristic code information and second characteristic code information after working head and handle assembly are completed, according to first characteristic code information and second characteristic code information, when first characteristic code information and second characteristic code information are consistent with the characteristic code information in preset characteristic code database, output electric signal to working head, so that working head works.

[0008] Optionally, the handle further comprises an electromagnetic wave emitting unit electrically connected with the control unit.

[0009] The control unit is further configured to control the electromagnetic wave emitting unit to emit electromagnetic waves in a preset frequency range to search for the working head information storage unit within a preset radius range after the working head and the handle are assembled; and read the second characteristic code information stored in the working head information storage unit after the working head information storage unit is searched within the preset range.

[0010] Optionally, the preset radius range d satisfies 10cm≤d≤15cm.

[0011] Optionally, the preset frequency range f satisfies 10Hz≤f≤10000Hz.

[0012] Optionally, the system further comprises a water injection tank, a switch and a handle wire.

[0013] The handle is connected with the control unit through the handle wire, and the handle wire is further communicated with the water injection tank through the switch.

[0014] The control unit is further configured to acquire the first characteristic code information through the handle wire; and control the switch to be closed to make the water in the water injection tank flow into the handle wire while outputting the electric signal to the working head to make the working head work.

[0015] Optionally, the first characteristic code information at least comprises an encoding formed by combination of at least two of a factory date, a product model and a product specification number of the handle; and the second characteristic code information at least comprises an encoding formed by combination of at least two of a factory date, a product model and a product specification number of the working head.

[0016] Optionally, the system further comprises an alarm unit.

[0017] The alarm unit is electrically connected with the control unit; and the control unit is further configured to control the alarm unit to alarm when the first characteristic code information and / or the second characteristic code information is inconsistent with the characteristic code information in a preset characteristic code database.

[0018] Optionally, the system further comprises a display unit.

[0019] The display unit is electrically connected with the control unit; and the control unit is further configured to control the display unit to display “illegal access” information when the first characteristic code information and / or the second characteristic code information is inconsistent with the characteristic code information in a preset characteristic code database.

[0020] Optionally, the working head information storage unit at least comprises a magnetic stripe patch.

[0021] The technical solution of this utility model, after the working head and handle are assembled, the handle's storage information unit stores the handle's first feature code information, and the working head's information storage unit stores the working head's second feature code information. By electrically connecting the control unit to the handle information storage unit and the working head information storage unit respectively, the control unit can read the handle's first feature code information and the working head's second feature code information. If both the first and second feature codes match the feature codes stored in the preset feature code information, it indicates that both the working head and handle are official genuine products, and the working head can be controlled to start working. At this time, the control unit will output an electrical signal to the working head to ensure its normal operation. Using the above system, accurate identification of the handle and working head in the ultrasonic scaler is achieved, ensuring the compatibility of the handle and working head, improving the anti-counterfeiting effect of the ultrasonic scaler, guaranteeing the authenticity of the ultrasonic scaler, and enhancing the user experience.

[0022] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of an ultrasonic dental scaler identification system provided in this embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the structure of the second ultrasonic dental scaler identification system provided in this embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of the third ultrasonic dental scaler identification system provided in this embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the structure of the fourth ultrasonic dental scaler identification system provided in this embodiment of the present invention;

[0028] Figure 5 A flowchart illustrating an ultrasonic dental scaler identification method provided in this embodiment of the present invention. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] In one embodiment, Figure 1 This is a schematic diagram of the structure of an ultrasonic scaler identification system provided in an embodiment of the present invention. This embodiment is applicable to situations where the identity of the handle and working head of an ultrasonic scaler is accurately identified to enhance anti-counterfeiting effects, such as... Figure 1 As shown, the system includes a control unit 1 and an ultrasonic scaler 2; the ultrasonic scaler 2 includes a handle 21 and a working head 22; the handle 21 is provided with a handle information storage unit 211, which stores the first feature code information of the handle 21; the working head 22 is provided with a working head information storage unit 221, which stores the second feature code information of the working head 22; the control unit 1 is electrically connected to the handle information storage unit 211 and the working head information storage unit 221 respectively; the control unit 1 includes a preset feature code database; after the working head 22 and the handle 21 are assembled, the control unit 1 reads the first feature code information and the second feature code information, and outputs an electrical signal to the working head 22 when both the first feature code information and the second feature code information are consistent with the feature code information in the preset feature code database, so that the working head 22 works.

[0032] The ultrasonic scaler 2 is a professional oral cleaning device that uses ultrasonic technology to assist dentists in teeth cleaning and periodontal treatment. The ultrasonic scaler 2 includes a handle 21 and a working head 22. The handle 21 is the handheld energy conversion part of the ultrasonic scaler 2, used to connect the control unit 1 and the working head 22 for convenient operation and control of the working head 22. The working head 22 is the direct action part of the ultrasonic scaler 2, used to vibrate and clean the tooth surface and gums. In this embodiment, the handle 21 is provided with a handle information storage unit 211, which stores first feature code information of the handle 21. This first feature code information uniquely corresponds to the handle 21, meaning that the first feature code information of one handle 21 is uniquely determined. The handle information storage unit 211 may include, but is not limited to, a chip. The working head 22 is provided with a working head information storage unit 221, which stores second feature code information of the working head 22. This second feature code information uniquely corresponds to the working head 22, meaning that the second feature code information of one working head 22 is uniquely determined. The working head information storage unit 221 includes, but is not limited to, magnetic strip patches. Specifically, a magnetic strip patch is affixed to a specific location on each working head 22, and each magnetic strip patch stores the second feature code information corresponding to the working head 22. The control unit 1 is the core control unit of the identification system. The control unit 1 includes a preset feature code database, which can be a worksheet or a text box; no limitation is made here. The preset feature code database includes unique feature code information corresponding to all produced handles 21 and working heads 22.

[0033] Specifically, when the ultrasonic dental scaler 2 is identified, the handle 21 and the working head 22 are assembled, the handle information storage unit 211 in the handle 21 stores the unique first characteristic code information corresponding to the handle 21, and the working head information storage unit 221 in the working head 22 also stores the unique second characteristic code information corresponding to the working head 22. By electrically connecting the control unit 1 with the handle information storage unit 211 and the working head information storage unit 221, the control unit 1 reads the first characteristic code information of the assembled handle 21 and the second characteristic code information of the working head 22, and compares the read first characteristic code information and the second characteristic code information with the preset characteristic code database stored in the control unit 1, to determine whether the first characteristic code information and the second characteristic code information are the characteristic code information pre-stored in the preset characteristic code database. When it is determined that the first characteristic code information and the second characteristic code information are the characteristic code information in the preset characteristic code database, that is, the first characteristic code information and the second characteristic code information can query the same characteristic code information in the preset characteristic code database, it indicates that the first characteristic code information and the second characteristic code information are consistent with the characteristic code information in the preset characteristic code database at this time, and the assembled handle 21 and the working head 22 are official qualified products produced in the production workshop, which are not high imitation products or unqualified products. Therefore, the working head 22 can be controlled to work, that is, the control unit 1 outputs an electric signal to the working head 22, and the working head 22 starts to work after receiving the electric signal, to clean the user's teeth. When the control unit 1 determines that at least one of the first characteristic code information and the second characteristic code information is not in the preset characteristic code database, that is, at least one of the first characteristic code information and the second characteristic code information cannot query the same characteristic code information in the preset characteristic code database, such as the second characteristic code information of the working head 22, it indicates that the working head 22 is not an official qualified product produced in the production workshop, which may be an unofficial high imitation product or an unqualified product. Therefore, the control unit 1 does not control the working head 22 to work, that is, the control unit 1 does not output an electric signal, to ensure that the working head 22 does not work.

[0034] The technical scheme of the utility model embodiment, after the handle and the handle assembly are completed, the handle storage information unit in the handle stores the first characteristic code information of the handle, the handle information storage unit in the handle stores the second characteristic code information of the handle, the control unit is electrically connected with the handle information storage unit and the handle information storage unit respectively, the control unit can read the first characteristic code information of the handle and the second characteristic code information of the handle, and according to the first characteristic code information and the second characteristic code information, when the first characteristic code information and the second characteristic code information are consistent with the characteristic code information stored in the preset characteristic code information, it indicates that the handle and the handle are official genuine products, then the handle can be controlled to start working, at this time the control unit will output an electric signal to the handle, ensuring the normal working of the handle. By using the above system, the identity of the handle and the handle in the ultrasonic dental cleaning machine is accurately identified, the adaptation of the handle and the handle is ensured, the anti-fake effect of the ultrasonic dental cleaning machine is improved, the genuine guarantee of the ultrasonic dental cleaning machine is realized, and the experience of the user is improved.

[0035] In another optional embodiment, the first characteristic code information at least includes the code formed by at least two combinations of the factory date, product model and product specification number of the handle; and the second characteristic code information at least includes the code formed by at least two combinations of the factory date, product model and product specification number of the handle. Wherein, the first characteristic code information and the second characteristic code information usually include but are not limited to the combination of letters and numbers, such as the product model represented by letters, the factory date and the product specification number represented by numbers. When the control unit 1 determines whether the first characteristic code information and the second characteristic code information are consistent with the characteristic code information in the preset characteristic code database, the factory date, product model and product specification number included in the first characteristic code information formed by the combination in the handle 21 and the second characteristic code information formed by the combination in the handle 22 are identified and judged respectively, and when it is determined that the factory date, product model and product specification number are consistent with the characteristic code information in the preset characteristic code database, it indicates that the first characteristic code information and the second characteristic code information are the same as the preset characteristic code information, at this time the control unit 1 will output an electric signal to control the handle 22 to work.

[0036] In another optional embodiment, Figure 2 The second ultrasonic dental cleaning machine identity recognition system provided by the utility model embodiment is shown in the structure diagram, referring to Figure 2As shown, the handle 21 further comprises an electromagnetic wave emitting unit 212, which is electrically connected with the control unit 1; the control unit 1 is further configured to control the electromagnetic wave emitting unit 212 to emit electromagnetic waves in a preset frequency range to search for the working head information storage unit 221 within a preset radius range after the working head 22 and the handle 21 are assembled; and after the working head information storage unit 221 is searched within the preset range, the second characteristic code information stored in the working head information storage unit 221 is read.

[0037] The electromagnetic wave emitting unit 212 is configured to emit electromagnetic waves in a powered state to search for the working head information storage unit 221 within a preset radius range in a preset frequency range.

[0038] Specifically, when there are multiple working heads 22 in the same space, each working head 22 is provided with a corresponding working head information storage unit 221, so as to avoid the working head storage unit 221 that is not assembled on the handle 21 from being identified, resulting in the control unit 1 making a mistake. In this embodiment, the electromagnetic wave emitting unit 212 is further provided on the handle 21. That is, after the working head 22 and the handle 21 are assembled, the control unit 1 only needs to read the second characteristic code information of the working head 22 assembled with the handle 21 when reading the characteristic code information. In order to prevent the second characteristic code information of the surrounding working head 22 from being read, the control unit 1 controls the electromagnetic wave emitting unit 212 to emit electromagnetic waves in a preset frequency range to search for the working head information storage unit 221 within a preset radius range. The preset frequency range can be set and output according to the actual working frequency of the ultrasonic dental cleaning machine 2, and the preset radius range is usually the distance between the handle information storage unit 211 and the working head information storage unit 221 of the working head 22 assembled with the handle 21, that is, to ensure that the working head information storage unit 221 obtained by the control unit 1 is the second characteristic code information stored in the working head information storage unit 221 of the working head 22 assembled with the handle 21, the second characteristic code information is read, and it is determined whether the second code information is consistent with the characteristic code information in the preset characteristic code database. When the consistency is confirmed, an electric signal is output to control the working head 22 to work.

[0039] In this embodiment, the preset radius range d satisfies: 10 cm≤d≤15 cm. Exemplarily, d can be 10 cm, 11 cm, 12 cm, 13 cm, 14 cm or 15 cm, etc., which can be determined according to actual conditions and is not limited herein. In addition, the preset frequency range f satisfies: 10 Hz≤f≤10000 Hz. Exemplarily, f can be 10 Hz, 100 Hz, 1000 Hz or 1000 Hz, etc., which can be determined according to actual conditions and is not limited herein.

[0040] In another optional embodiment, Figure 3The utility model discloses a third ultrasonic dental cleaning machine identity recognition system's structure diagram for the embodiment of the utility model provides, reference Figure 3 As shown in the figure, the system further comprises a water tank 3, a switch 4 and a handle line 5; the handle 21 is connected with the control unit 1 through the handle line 5, and the handle line 5 is also communicated with the water tank 3 through the switch 4; the control unit 1 is further used to acquire the first characteristic code information through the handle line 5; when the electric signal is output to the working head 22, the switch 4 is controlled to be closed to make the water in the water tank 3 flow into the handle line 5 while the working head 22 is working.

[0041] The water tank 3 is used to store the flushing liquid used in the dental cleaning process, which can be water or a specific cleaning solution, for cleaning teeth and gums during the dental cleaning process, and can also cool the working head 22 of the ultrasonic dental cleaning machine 1 to prevent the generated heat from causing damage to the teeth and gums, and the water flow also plays a lubricating role to reduce friction during the dental cleaning process. The handle line 5 is used to connect the handle 21 of the ultrasonic dental cleaning machine 2 and the control unit 1, and is responsible for information interaction between the control unit 1 and the handle information storage unit 211 of the handle 21. In addition, the handle line 5 is also connected between the water tank 3 through the switch 4, and is responsible for transmitting the water path to ensure that the water or cleaning solution in the water tank 3 can flow into the working head 22 through the handle line 5.

[0042] Specifically, in the actual application process, the handle line 5 is usually connected between the control unit 1 and the handle 21, therefore, when the control unit 1 reads the first characteristic code information stored in the handle information storage unit 211, the first characteristic code information can be read through the handle line 5. In addition, the handle line 5 has the function of transmitting water or cleaning solution in addition to the function of information transmission. That is to say, when the working head 22 is working, water needs to be used to realize the cleaning of the teeth, therefore, when the control unit 1 outputs the electric signal to make the working head 22 work, the switch 4 will be controlled to be closed to make the water or cleaning solution stored in the water tank 3 flow into the handle line 5 to flow into the working head 22 through the handle line 5, thereby realizing the cleaning and flushing effect on the teeth.

[0043] In another optional embodiment, Figure 4 The utility model discloses a fourth ultrasonic dental cleaning machine identity recognition system's structure diagram for the embodiment of the utility model provides, reference Figure 4 As shown in the figure, the system further comprises an alarm unit 6; the alarm unit 6 is electrically connected with the control unit 1; the control unit 1 is further used to control the alarm unit 6 to alarm when the first characteristic code information and / or the second characteristic code information is inconsistent with the characteristic code information in the preset characteristic code database.

[0044] Optionally, continuing to refer to Figure 4As shown, the system further comprises a display unit 7; the display unit 7 is electrically connected with the control unit 1; the control unit 1 is further used for controlling the display unit 7 to display "illegal access" information when the first feature coding information and / or the second feature coding information is inconsistent with the feature coding information in the preset feature coding database.

[0045] The alarm unit 6 is used for alarming when the first feature coding information and / or the second feature coding information is inconsistent with the feature coding information in the preset feature coding database. The display unit 7 is used for displaying preset content when the first feature coding information and / or the second feature coding information is inconsistent with the feature coding information in the preset feature coding database.

[0046] Specifically, when the control unit 1 determines that the first feature coding information and / or the second feature coding information is inconsistent with the feature coding information in the preset feature coding database, that is, the first feature coding information is inconsistent with the feature coding information in the preset feature coding database, or the second feature coding information is inconsistent with the feature coding information in the preset feature coding database, or both the first feature coding information and the second feature coding information are inconsistent with the feature coding information in the preset feature coding database, it indicates that the working head 22 and / or the handle 21 belong to the official qualified products produced by the production workshop, and belong to the non-official products or unqualified products. Therefore, the control unit 1 controls the alarm unit 6 to alarm, and the alarm sound can include but is not limited to "ticking", "tapping" and other sounds that can be clearly heard by the staff, and at the same time controls the display unit 7 to display "illegal access" and the like, so that the staff can also determine the reason for the abnormal alarm through the text displayed by the display unit 7.

[0047] In another optional embodiment, Figure 5 A flow chart of an ultrasonic dental cleaning machine identity recognition method provided by the embodiment of the utility model is realized based on the above ultrasonic dental cleaning machine identity recognition system, and reference is made to Figure 5 As shown, the method comprises:

[0048] S110, reading the first feature coding information and the second feature coding information after the working head and the handle are assembled.

[0049] S120, according to the first feature coding information and the second feature coding information, when the first feature coding information and the second feature coding information are consistent with the feature coding information in the preset feature coding database, outputting an electric signal to the working head to make the working head work.

[0050] Specifically, in the identity recognition of the ultrasonic dental scaler, the handle information storage unit stores the unique first characteristic code information corresponding to the handle after the handle and the working head are assembled, and the working head information storage unit also stores the unique second characteristic code information corresponding to the working head. By reading the first characteristic code information of the assembled handle and the second characteristic code information of the working head, and comparing the read first characteristic code information and second characteristic code information with the pre-stored preset characteristic code database, it is determined whether the first characteristic code information and the second characteristic code information are the characteristic code information pre-stored in the preset characteristic code database. When it is determined that the first characteristic code information and the second characteristic code information are both characteristic code information in the preset characteristic code database, that is, the same characteristic code information can be queried in the preset characteristic code database, it indicates that the assembled handle and working head are both official qualified products produced in the production workshop, and are not high-imitation products or unqualified products. Therefore, the working head can be controlled to work, that is, an electric signal is output to the working head at this time, and the working head starts to work after receiving the electric signal, thereby achieving the cleaning of the user's teeth. When it is determined that at least one of the first characteristic code information and the second characteristic code information is not in the preset characteristic code database, that is, at least one of the first characteristic code information and the second characteristic code information cannot be queried in the preset characteristic code database, such as the second characteristic code information of the working head, it indicates that the working head is not an official qualified product produced in the production workshop, and may be an unofficial high-imitation product or an unqualified product. Therefore, the working head will not work, that is, no electric signal will be output, so as to ensure that the working head does not work.

[0051] The technical scheme of the embodiment of the utility model, through reading the first characteristic code information and the second characteristic code information after the working head and the handle are assembled, outputting an electric signal to the working head when the first characteristic code information and the second characteristic code information are consistent with the characteristic code information in the preset characteristic code database, so that the working head works. By using the above method, the identity of the handle and the working head in the ultrasonic dental scaler is accurately identified, the adaptation degree of the handle and the working head is ensured, the anti-counterfeiting effect of the ultrasonic dental scaler is improved, the genuine guarantee of the ultrasonic dental scaler is realized, and the user's experience is improved.

[0052] It should be understood that various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the utility model can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical scheme of the utility model can be achieved, which is not limited herein.

[0053] The specific embodiments described above do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An ultrasonic dental scaler identification system, comprising: The ultrasonic dental scaler comprises a control unit and an ultrasonic dental scaler; The ultrasonic dental scaler comprises a handle and a working head; the handle is provided with a handle information storage unit, which is used for storing first characteristic code information of the handle; the working head is provided with a working head information storage unit, which is used for storing second characteristic code information of the working head; The control unit is electrically connected with the handle information storage unit and the working head information storage unit respectively; the control unit comprises a preset characteristic code database; after the working head and the handle are assembled, the control unit reads the first characteristic code information and the second characteristic code information, and outputs an electric signal to the working head when the first characteristic code information and the second characteristic code information are consistent with the characteristic code information in the preset characteristic code database, so as to make the working head work.

2. The identity recognition system of claim 1, wherein, The handle further comprises an electromagnetic wave emitting unit, which is electrically connected with the control unit; The control unit is further used for controlling the electromagnetic wave emitting unit to emit electromagnetic waves in a preset frequency range to search for the working head information storage unit in a preset radius range after the working head and the handle are assembled; after the working head information storage unit is searched in the preset radius range, the control unit reads the second characteristic code information stored in the working head information storage unit.

3. The identity recognition system of claim 2, wherein, The preset radius range d satisfies 10 cm≤d≤15 cm.

4. The identity recognition system of claim 2, wherein, The preset frequency range f satisfies 10 Hz≤f≤10000 Hz.

5. The identity recognition system of claim 1, wherein, The ultrasonic dental scaler further comprises a water injection tank, a switch and a handle wire; The handle is connected with the control unit through the handle wire, and the handle wire is communicated with the water injection tank through the switch; The control unit is further used for acquiring the first characteristic code information through the handle wire; while the electric signal is output to the working head to make the working head work, the control unit controls the switch to be closed, so that water in the water injection tank flows into the handle wire.

6. The identity recognition system of claim 1, wherein, The first characteristic code information at least comprises an encoding formed by combination of at least two of factory date, product model and product specification number of the handle; the second characteristic code information at least comprises an encoding formed by combination of at least two of factory date, product model and product specification number of the working head.

7. The identity recognition system of claim 1, wherein, The ultrasonic dental scaler further comprises an alarm unit; The alarm unit is electrically connected with the control unit; the control unit is further used for controlling the alarm unit to alarm when the first characteristic code information and / or the second characteristic code information is inconsistent with the characteristic code information in the preset characteristic code database.

8. The identity recognition system of claim 1, wherein, The ultrasonic dental scaler further comprises a display unit; The display unit is electrically connected with the control unit; the control unit is further used for controlling the display unit to display "illegal access" information when the first characteristic code information and / or the second characteristic code information is inconsistent with the characteristic code information in the preset characteristic code database.

9. The identity recognition system of claim 1, wherein, The working head storage information unit at least comprises a magnetic stripe patch.

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