CN215067204U - Dental instrument detection device and dental instrument - Google Patents
Dental instrument detection device and dental instrument Download PDFInfo
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- CN215067204U CN215067204U CN202120901682.9U CN202120901682U CN215067204U CN 215067204 U CN215067204 U CN 215067204U CN 202120901682 U CN202120901682 U CN 202120901682U CN 215067204 U CN215067204 U CN 215067204U
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Abstract
The utility model provides a dental instrument's detection device and dental instrument relates to circuit technical field. The method comprises the following steps: the device comprises a relay, a wiring detection circuit and a controller; wherein, the zero-live wire terminal of the relay is used for electrically connecting the zero-live wire terminal of the commercial power alternating current power supply, and the power supply output end of the relay is electrically connected with the power supply end of the commercial power electric component of the dental instrument; a first wiring detection end of the wiring detection circuit is electrically connected with a zero-live wire wiring end of the commercial power alternating-current power supply, and a second wiring detection end of the wiring detection circuit is electrically connected with a shell of the commercial power electric component; the output end of the wiring detection circuit is electrically connected with the controller; the output end of the controller is electrically connected with the control end of the relay. When the grounding end of the shell and the commercial power alternating current power supply is not connected, the grounding protection is determined to be absent, the electric connection path with the commercial power electric component is disconnected, and the safety of the dental appliance is improved.
Description
Technical Field
The utility model relates to the technical field of circuits, particularly, relate to a dental instrument's detection device and dental instrument.
Background
Along with the development of scientific technology, various electric appliances are more and more. Among them, there are more and more electric appliances for dental treatment, which directly or indirectly contact a human body using high voltage, and thus it is also becoming more and more important to avoid leakage accidents of the dental appliances.
In the related art, the charged part and the housing of the dental instrument are grounded to avoid possible leakage accidents of the dental instrument.
However, in the related art, when the grounding part is not connected, there is no grounding protection, and when electric leakage occurs, high voltage electricity can directly act on the human body, which causes potential safety hazards.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a detection device and dental apparatus of dental apparatus to not enough among the above-mentioned prior art to when ground connection part is not connected well in solving the correlation technique, there is not ground protection, when the electric leakage appears, high-tension electricity can direct action in the human body, causes the problem of potential safety hazard.
In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, an embodiment of the present invention provides a detection apparatus for a dental instrument, including: the device comprises a relay, a wiring detection circuit and a controller; the zero-live wire terminal of the relay is used for being electrically connected with a zero-live wire terminal of a commercial power alternating current power supply, and the power supply output end of the relay is electrically connected with the power supply end of a commercial power electric component of the dental instrument;
a first connection detection end of the connection detection circuit is electrically connected with a zero-live line terminal of the commercial power alternating-current power supply, and a second connection detection end of the connection detection circuit is electrically connected with a shell of the commercial power electric component so as to detect alternating-current voltage of the zero-live line terminal; the output end of the wiring detection circuit is electrically connected with the controller, so that the controller judges whether the shell is connected with the grounding end of the commercial power alternating-current power supply or not according to the alternating-current voltage of the zero-live wire terminal;
the output end of the controller is electrically connected with the control end of the relay, so that the controller controls the relay to disconnect the electric connection path with the electric component for commercial power when detecting that the shell is not connected with the grounding end of the commercial power alternating-current power supply.
Optionally, the detection apparatus further includes: a display device and/or an alarm device;
the display device is electrically connected with the controller to display the detection result output by the controller;
the alarm device is electrically connected with the controller to send out an alarm signal under the condition that the detection result indicates abnormal wiring.
Optionally, the detection apparatus further includes: a voltage reduction circuit; the power grounding end of the voltage reduction circuit is electrically connected with the power wiring end of the commercial power alternating-current power supply, so that the voltage reduction circuit performs voltage reduction treatment on alternating commercial power output by the commercial power alternating-current power supply;
the output end of the voltage reduction circuit is respectively and electrically connected with the power supply end of the wiring detection circuit, the power supply end of the relay and the power supply end of the controller.
Optionally, the wiring detection circuit includes: first opto-isolator and second opto-isolator, wiring detection circuitry's power end includes: the first low-voltage terminal of first optical isolator with the third low-voltage terminal of second optical isolator, wiring detection circuitry's output includes: the second low-voltage terminal of first optical isolator with the fourth low-voltage terminal of second optical isolator, first wiring sense terminal includes: the first high voltage terminal of first optical isolator with the third high voltage terminal of second optical isolator, second wiring sense terminal includes: a second high voltage end of the first opto-isolator and a fourth high voltage end of the second opto-isolator;
a first high-voltage end of the first optical coupler isolator is electrically connected with a fire wire end of the relay, and a second high-voltage end of the first optical coupler isolator is electrically connected with the shell; a first low-voltage end of the first optical coupler isolator is electrically connected with an output end of the voltage reduction circuit, and a second low-voltage end of the first optical coupler isolator is electrically connected with the controller;
a third high-voltage end of the second optical coupler isolator is electrically connected with a zero line end of the relay, and a fourth high-voltage end of the second optical coupler isolator is electrically connected with the shell; the third low-voltage end of second opto-isolator with step-down circuit's output electricity is connected, the fourth low-voltage end of second opto-isolator with the controller electricity is connected, so that the controller basis the alternating voltage of second low-voltage end and fourth low-voltage end output judges the shell with whether commercial power alternating current power supply's earthing terminal is connected, or, basis the alternating voltage of second low-voltage end and fourth low-voltage end output judges whether commercial power alternating current power supply's live wire end and zero line end are connected and are had the transposition.
Optionally, the wiring detection circuit further includes: the filter circuit comprises a first output resistor, a first filter resistor and a first filter capacitor;
the second low voltage end of the first optical coupler isolator is respectively electrically connected with one end of the first output resistor and one end of the first filter resistor, the other end of the first filter resistor is electrically connected with one end of the first filter capacitor, and the other end of the first output resistor and the other end of the first filter capacitor are grounded.
Optionally, the wiring detection circuit further includes: the second output resistor, the second filter resistor and the second filter capacitor;
the fourth low-voltage end of the second optical coupler isolator is respectively electrically connected with one end of the second output resistor and one end of the second filter resistor, the other end of the second filter resistor is electrically connected with one end of the second filter capacitor, and the other end of the second output resistor and the other end of the second filter capacitor are grounded.
Optionally, the connection detection circuit further includes a first current limiting resistor and a second current limiting resistor;
one end of the first current limiting resistor is electrically connected with a live wire end of the relay, and the other end of the first current limiting resistor is electrically connected with a first high-voltage end of the first optocoupler isolator;
one end of the second current-limiting resistor is electrically connected with a zero line end of the relay, and the other end of the second current-limiting resistor is electrically connected with a third high-voltage end of the second optical coupler isolator.
In a second aspect, embodiments of the present invention further provide a dental instrument, including: a mains electricity consuming component, a housing and a dental instrument detection device according to any of the first aspect;
the electric component for commercial power is arranged in the shell in a contact manner;
the shell is electrically connected with a second wiring detection end of the wiring detection circuit in the detection device, and the shell is used for being electrically connected with a grounding end of a commercial power alternating current power supply.
Optionally, the housing is provided with an accommodating cavity, and the electric supply part is attached to the inner wall of the accommodating cavity.
Optionally, the electric component for commercial power includes: resistance wire and insulating layer;
the insulating layer is arranged on the surface of the resistance wire in a surrounding mode.
The utility model has the advantages that: an embodiment of the utility model provides a detection device of dental instrument, include: the device comprises a relay, a wiring detection circuit and a controller; wherein, the zero-live wire terminal of the relay is used for electrically connecting the zero-live wire terminal of the commercial power alternating current power supply, and the power supply output end of the relay is electrically connected with the power supply end of the commercial power electric component of the dental instrument; a first connection detection end of the connection detection circuit is electrically connected with a zero-live line connection end of a commercial power alternating current power supply, and a second connection detection end of the connection detection circuit is electrically connected with a shell of a commercial power electric component so as to detect alternating current voltage of the zero-live line connection end; the output end of the wiring detection circuit is electrically connected with the controller, so that the controller judges whether the shell is connected with the grounding end of the commercial power alternating-current power supply or not according to the alternating-current voltage of the zero-live wire wiring end; the output end of the controller is electrically connected with the control end of the relay, so that the controller controls the relay to disconnect the electric connection path with the electric component for commercial power under the condition that the controller detects that the shell is not connected with the grounding end of the commercial power alternating-current power supply. The connection detection circuit can detect the connection state of the shell and the grounding end of the commercial power alternating current power supply, the controller can determine whether grounding protection exists according to the connection state, when the situation that the shell is not connected with the grounding end of the commercial power alternating current power supply is determined, the grounding protection does not exist, the electric connection path with the commercial power electric component is disconnected, and the safety of the dental appliance is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a detection device for a dental instrument according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a detection device for a dental instrument according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a wiring detection circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a relay according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that if the terms "upper", "lower", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the product of the application is used, the description is only for convenience of describing the application and simplifying the description, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and operation, and thus, cannot be understood as the limitation of the application.
Furthermore, the terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
Fig. 1 is a schematic structural diagram of a detection apparatus for a dental instrument according to an embodiment of the present invention, as shown in fig. 1, the detection apparatus for a dental instrument may include: a relay 101, a wiring detection circuit 102, and a controller 103; the zero-live wire terminal of the relay 101 is used for being electrically connected with the zero-live wire terminal of the commercial power alternating current power supply 105, and the power supply output end of the relay 101 is electrically connected with the power supply end of the commercial power electric component of the dental instrument.
Wherein, the zero live wire terminal of the relay 101 may include: a zero line end of the relay 101 and a fire line end of the relay 101; similarly, the live and zero line terminals of the ac mains 105 may include: the zero line end of the commercial power alternating current power supply 105 and the fire line end of the commercial power alternating current power supply 105. The mains ac power supply 105 may be a 220V (volt) ac power supply.
In addition, a first connection detection end of the connection detection circuit 102 is electrically connected with a zero-live line terminal of the relay 101, and a second connection detection end of the connection detection circuit 102 is electrically connected with a shell 104 of a commercial power electric component so as to detect the alternating voltage of the zero-live line terminal; the output terminal of the connection detection circuit 102 is electrically connected to the controller 103, so that the controller 103 determines whether the housing 104 is connected to the ground terminal of the ac power supply 105 according to the ac voltage at the terminal of the zero line and the live line.
The electric component for commercial power can be a component directly or indirectly contacted with a user.
It should be noted that the ground terminal of the connection detection circuit 102 is electrically connected to the housing 104 of the commercial power electrical component, so that the connection detection circuit 102 can more accurately detect whether the housing 104 is connected to the ground terminal of the commercial power ac power supply 105. The connection detecting circuit 102 may send the ac voltage of the zero line terminal to the controller 103, and accordingly, the controller 103 may receive the ac voltage of the zero line terminal and determine whether the housing 104 is connected to the ground of the ac mains power supply 105 according to the ac voltage of the zero line terminal and the ac voltage of the live line terminal.
In addition, the output terminal of the controller 103 is electrically connected to the control terminal of the relay 101, so that the controller 103 controls the relay 101 to disconnect the electrical connection path with the commercial power utilization component when detecting that the housing 104 is not connected to the ground terminal of the commercial power ac power supply 105.
In the embodiment of the present application, it is possible to detect the connection state of the housing 104 and the ground terminal of the ac power supply 105, and based on the connection state, the opening or closing of the relay 101 can be intelligently controlled. When the controller 103 detects that the housing 104 is not connected to the ground of the ac mains supply 105, the ac mains supply 105 supplies power to the electric components, which may cause leakage of the electric components and potential safety hazards. Therefore, the controller 103 needs to control the relay 101 to be turned off at this time.
Of course, when the controller 103 detects that the housing 104 is connected to the ground terminal of the ac mains power supply 105, it indicates that there is no safety hazard in supplying power to the electric components for the mains power through the ac mains power supply 105, and controls the relay 101 to close.
It should be noted that the electric component used by the utility power may be any component in the dental instrument that needs to use electric power, and this is not particularly limited by the embodiment of the present application.
To sum up, the embodiment of the present invention provides a detection apparatus for a dental instrument, including: the device comprises a relay, a wiring detection circuit and a controller; wherein, the zero-live wire terminal of the relay is used for electrically connecting the zero-live wire terminal of the commercial power alternating current power supply, and the power supply output end of the relay is electrically connected with the power supply end of the commercial power electric component of the dental instrument; a first connection detection end of the connection detection circuit is electrically connected with a zero-live line connection end of a commercial power alternating current power supply, and a second connection detection end of the connection detection circuit is electrically connected with a shell of a commercial power electric component so as to detect alternating current voltage of the zero-live line connection end; the output end of the wiring detection circuit is electrically connected with the controller, so that the controller judges whether the shell is connected with the grounding end of the commercial power alternating-current power supply or not according to the alternating-current voltage of the zero-live wire wiring end; the output end of the controller is electrically connected with the control end of the relay, so that the controller controls the relay to disconnect the electric connection path with the electric component for commercial power under the condition that the controller detects that the shell is not connected with the grounding end of the commercial power alternating-current power supply. The connection detection circuit can detect the connection state of the shell and the grounding end of the commercial power alternating current power supply, the controller can determine whether grounding protection exists according to the connection state, when the situation that the shell is not connected with the grounding end of the commercial power alternating current power supply is determined, the grounding protection does not exist, the electric connection path with the commercial power electric component is disconnected, and the safety of the dental appliance is improved.
Optionally, fig. 2 is a schematic structural diagram of a detection apparatus for a dental instrument according to an embodiment of the present invention, as shown in fig. 2, the detection apparatus may further include: display device 106 and/or alarm device 107;
the display device 106 is electrically connected to the controller 103 to display the detection result output by the controller 103; the alarm device 107 is electrically connected to the controller 103 to issue an alarm signal in the case where the detection result indicates a wiring abnormality.
Additionally, the wiring anomalies may include: the housing 104 is not connected to the ground of the ac mains supply 105, or there is a reverse connection to the live-zero connection of the ac mains supply 105, etc. Optionally, whether the zero line and live line connection of the commercial power ac power supply 105 is reverse connection may be whether the zero line and live line end of the power socket and the zero line and live line of the power grid are reverse connection.
It should be noted that the display device 106 can also display the zero-live wire connection state of the relay 101, or the connection state of the housing 104 and the ground terminal of the ac power supply 105. And sending an alarm signal when the detection result shows that the zero-live wire connection state of the commercial power alternating-current power supply 105 is reversely connected or the shell 104 is not connected with the grounding end of the commercial power alternating-current power supply 105.
In some embodiments, the display device 106 may be: a diode or a display screen; the alarm can be: the device capable of audible alarm may be, for example, a speaker. Of course, the display device 106 and the alarm may be selected according to actual requirements, which is not particularly limited in the embodiments of the present application.
Optionally, as shown in fig. 2, the detecting device may further include: a voltage step-down circuit 108.
The power ground terminal of the voltage-reducing circuit 108 is electrically connected to the power terminal of the ac mains power supply 105, so that the voltage-reducing circuit 108 reduces the voltage of the ac mains power output by the ac mains power supply 105. The output end of the voltage-reducing circuit 108 is electrically connected to the power supply end of the connection detecting circuit 102, the power supply end of the relay 101, and the power supply end of the controller 103, respectively.
In this embodiment, the ac power supply 105 may output ac power to the voltage-reducing circuit 108, and the voltage-reducing circuit 108 obtains the ac power, reduces the voltage of the ac power, and outputs dc power to provide dc power for the detection circuit, the relay 101, the controller 103, and the like. The direct current may be 23V.
Of course, an independent dc power supply may also be used to provide dc power for the detection circuit, the relay 101, the controller 103, and the like, which is not particularly limited in the embodiment of the present application.
Optionally, fig. 3 is a schematic structural diagram of the wiring detection circuit 102 according to an embodiment of the present invention, as shown in fig. 3, the wiring detection circuit 102 includes: first opto-isolator and second opto-isolator, the power end of wiring detection circuitry 102 includes: the first low-voltage terminal of first opto-isolator and the third low-voltage terminal of second opto-isolator, the output of wiring detection circuitry 102 includes: second low-voltage terminal of first opto-isolator and the fourth low-voltage terminal of second opto-isolator, first wiring sense terminal includes: first high-voltage terminal of first opto-isolator and the third high-voltage terminal of second opto-isolator, second wiring sense terminal includes: the second high-voltage end of the first optical coupler isolator and the fourth high-voltage end of the second optical coupler isolator.
Wherein, as shown in fig. 3, the left optical coupler isolator in fig. 3 is a first optical coupler isolator, the first optical coupler isolator can include pin 1, pin 2, pin 3, pin 4, pin 1 of the first optical coupler isolator can be a first high-voltage end, pin 2 of the first optical coupler isolator can be a second high-voltage end, pin 3 of the first optical coupler isolator can be a first low-voltage end, and pin 4 of the first optical coupler isolator can be a second low-voltage end.
Similarly, the optical coupler isolator on the right side in fig. 3 is a second optical coupler isolator, the second optical coupler isolator can comprise a pin 1, a pin 2, a pin 3 and a pin 4, the pin 1 of the second optical coupler isolator can be a third high-voltage end, the pin 2 of the second optical coupler isolator can be a fourth high-voltage end, the pin 3 of the third optical coupler isolator can be a third low-voltage end, and the pin 4 of the first optical coupler isolator can be a fourth low-voltage end.
A first high-voltage end of the first optical coupler isolator is electrically connected with a live wire end AC _ L of the relay 101, and a second high-voltage end of the first optical coupler isolator is electrically connected with the shell 104; the first low-voltage end of the first optical coupler isolator is electrically connected with the output end of the voltage reduction circuit 108, and the second low-voltage end of the first optical coupler isolator is electrically connected with the controller 103.
A third high-voltage end of the second optical coupler isolator is electrically connected with a zero line end AC _ N of the relay 101, and a fourth high-voltage end of the second optical coupler isolator is electrically connected with the shell 104; the third low-voltage end of the second optical coupler isolator is electrically connected with the output end of the voltage reduction circuit 108, and the fourth low-voltage end of the second optical coupler isolator is electrically connected with the controller 103, so that the controller 103 judges whether the grounding end of the shell 104 and the commercial power alternating-current power supply 105 is connected or not according to the alternating-current voltages output by the second low-voltage end and the fourth low-voltage end, or judges whether the live wire end and the zero wire end of the commercial power alternating-current power supply 105 are reversely connected or not according to the alternating-current voltages output by the second low-voltage end and the fourth low-voltage end.
The output end of the voltage-reducing circuit 108 outputs a dc power VCC, and the second high-voltage end of the first opto-isolator and the fourth high-voltage end of the second opto-isolator are both connected to the housing 104, so as to be connected to the ground GND of the ac power supply 105.
Note that the ac voltages output from the second low-voltage terminal and the fourth low-voltage terminal are ADC1 and ADC2, respectively. When the ADC1 is at high level and the ADC2 is at low level, it indicates that the power supply is normal; when both ADC1 and ADC2 are high, it indicates that the housing 104 is not connected to the ground of the ac mains supply 105; when ADC1 is low and ADC2 is high, it indicates that the ac mains 105 is connected in reverse.
Optionally, as shown in fig. 3, the connection detecting circuit 102 may further include: the voltage stabilizing circuit comprises a first voltage stabilizing capacitor C1, a second voltage stabilizing capacitor C2, a third voltage stabilizing capacitor C3 and a fourth voltage stabilizing capacitor C4.
One end of the first voltage-stabilizing capacitor C1 and one end of the second voltage-stabilizing capacitor C2 are both electrically connected to the output end of the voltage-reducing circuit 108, and the other end of the first voltage-stabilizing capacitor C1 and the other end of the second voltage-stabilizing capacitor C2 are both grounded DGND. The first voltage stabilizing capacitor C1 and the second voltage stabilizing capacitor C2 can stabilize the dc power VCC at the output terminal of the step-down circuit 108.
One end of the third voltage-stabilizing capacitor C3 and one end of the fourth voltage-stabilizing capacitor C4 are both electrically connected to the output terminal of the step-down circuit 108, and the other end of the third voltage-stabilizing capacitor C3 and the other end of the fourth voltage-stabilizing capacitor C4 are both grounded to DGND. The third voltage stabilizing capacitor C3 and the fourth voltage stabilizing capacitor C4 can stabilize the dc power VCC at the output terminal of the step-down circuit 108.
In the embodiment of the application, high voltage and low voltage electricity can be isolated through the first optical coupler isolator and the second optical coupler isolator, and interference between the high voltage electricity and the low voltage electricity is avoided.
Alternatively, the first and third zener capacitors C1 and C3 may be 100nF (nano farad), and the second and fourth zener capacitors C2 and C4 may be 100uF (micro farad).
Optionally, as shown in fig. 3, the connection detecting circuit 102 further includes: the first output resistor R1, the first filter resistor R2 and the first filter capacitor C5;
the second low-voltage end of the first optical coupler isolator is electrically connected with one end of the first output resistor R1 and one end of the first filter resistor R2 respectively, the other end of the first filter resistor R2 is electrically connected with one end of the first filter capacitor C5, and the other end of the first output resistor R1 and the other end of the first filter capacitor C5 are grounded.
Optionally, the connection detecting circuit 102 further includes: the second output resistor R3, the second filter resistor R4 and the second filter capacitor C6;
the fourth low-voltage end of the second optical coupler isolator is electrically connected with one end of a second output resistor R3 and one end of a second filter resistor R4 respectively, the other end of the second filter resistor R4 is electrically connected with one end of a second filter capacitor C6, and the other end of the second output resistor R3 and the other end of the second filter capacitor C6 are grounded.
It should be noted that, when the power supply is normal, the zero line end AC _ N of the relay 101 is at the same potential as the outer shell 104, the second optical isolator is not conducted, and the low level of the other end of the second output resistor R2, which is grounded, is used as the output, so the ADC2 is at the low level; the live wire terminal AC _ L of the relay 101 is not equipotential with the housing 104, the first optocoupler isolator is turned on, the low level of the other end of the first output resistor R1 grounded is regarded as no output, and the ADC1 is at the high level. When the housing 104 is not connected to the ground terminal of the ac mains supply 105, the first optical coupler isolator and the second optical coupler isolator are both non-conductive, and the ADC1 and the ADC2 are both at a high level.
Alternatively, the first output resistor R1 and the second output resistor R3 may be 5.4K Ω (kilo ohms), the first filter resistor R2 and the second filter resistor R4 may be 10K Ω, and the first filter capacitor C5 and the second filter capacitor C6 may be 47 uF.
Optionally, as shown in fig. 3, the connection detecting circuit 102 may further include a first current limiting resistor R5 and a second current limiting resistor R6.
One end of the first current limiting resistor R5 is electrically connected with a live wire end AC _ L of the relay 101, and the other end of the first current limiting resistor R5 is electrically connected with a first high-voltage end of the first optocoupler isolator; one end of a second current limiting resistor R6 is electrically connected with the zero line end of the relay 101, and the other end of the second current limiting resistor R6 is electrically connected with the third high-voltage end of the second optical coupler isolator.
In addition, the first current limiting resistor R5 may reduce the current of the live line terminal AC _ L of the relay 101, and the processed current is applicable to the first optocoupler isolator; the second current limiting resistor R6 can reduce the current of the zero line end AC _ N of the relay 101, and the processed current is suitable for the second optical coupler isolator, so that the first optical coupler isolator and the second optical coupler isolator are prevented from being burnt.
It should be noted that the first current limiting resistor R5 may also be disposed between the second high voltage end of the first optical isolator and the housing 104; a second current limiting resistor R6 may also be provided between the fourth high voltage terminal of the second optocoupler isolator and the housing 104.
In addition, the number of the first current limiting resistor R5 and the second current limiting resistor R6 is not particularly limited in the embodiments of the present application.
In some embodiments, two 150K Ω current limiting resistors may be connected in series between the first high voltage terminal of the first optocoupler isolator and the live line terminal AC _ L of the relay 101; between the second high voltage side of the first optocoupler isolator and the housing 104, two current limiting resistors of 150K Ω may be connected in series. Similarly, two current-limiting resistors of 150 kilohms can be connected in series between the third high-voltage end of the second optical coupler isolator and the zero line end AC _ N of the relay 101; between the fourth high voltage terminal of the second optocoupler-isolator and the housing 104, two current limiting resistors of 150K Ω may be connected in series.
Optionally, fig. 4 is a schematic structural diagram of the relay 101 provided in the embodiment of the present invention, as shown in fig. 4, the detecting device further includes: a third current limiting resistor R7 and a triode.
The controller 103 is connected with one end of a third current limiting resistor R7, and the other end of the third current limiting resistor R7 is connected with the base electrode of the triode; the collector of the triode is electrically connected with the 8 th pin of the relay 101, and the emitter of the triode is grounded.
In addition, a fourth current limiting resistor R8 may be connected between the 1 st pin of the relay 101 and the output terminal VCC of the voltage dropping circuit 108, and a diode D1 may be electrically connected between the 8 th pin and the 1 st pin of the relay 101; the 5 th pin and the 4 th pin of the relay 101 can be electrically connected with a zero line end and a fire line end of the commercial power alternating current power supply 105 through pins; and a 6 th pin and a 3 rd pin of the relay 101 respectively output the zero line terminal voltage AC _ N _ OUT and the fire line terminal voltage AC _ L _ OUT to the electric parts for commercial power.
It should be noted that, when the 6 th pin and the 7 th pin of the relay 101 are connected, the 3 rd pin and the 2 nd pin of the relay 101 are connected, and the relay 101 is disconnected; when the 6 th pin and the 5 th pin of the relay 101 are connected, the 3 rd pin and the 5 th pin of the relay 101 are connected, and the relay 101 is closed.
Embodiments of the present application also provide a dental instrument, comprising: the electric components for the commercial power, the shell 104 and the detection device of the dental instrument. Wherein, the electric component for commercial power is arranged in the shell 104 in a contact way; the housing 104 is electrically connected to a second connection detection terminal of the connection detection circuit 102 in the detection device, and the housing 104 is electrically connected to a ground terminal of the ac power supply 105.
Optionally, the housing 104 is provided with an accommodating cavity, and the electric supply component is attached to an inner wall of the accommodating cavity.
Optionally, the special diagnosis is that the commercial power consumption part comprises: resistance wire and insulating layer; the insulating layer surrounds and is arranged on the surface of the resistance wire.
It should be noted that, by providing the detection device in the dental apparatus, it is possible to detect whether the connection between the housing 104 and the ground terminal electrically connected to the commercial ac power supply 105 is normal, and to control the relay 101 to disconnect the electrical connection path with the commercial electric component, thereby improving the safety of the dental apparatus.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A dental instrument detection apparatus, comprising: the device comprises a relay, a wiring detection circuit and a controller; the zero-live wire terminal of the relay is used for being electrically connected with a zero-live wire terminal of a commercial power alternating current power supply, and the power supply output end of the relay is electrically connected with the power supply end of a commercial power electric component of the dental instrument;
a first connection detection end of the connection detection circuit is electrically connected with a zero-live line terminal of the commercial power alternating-current power supply, and a second connection detection end of the connection detection circuit is electrically connected with a shell of the commercial power electric component so as to detect alternating-current voltage of the zero-live line terminal; the output end of the wiring detection circuit is electrically connected with the controller, so that the controller judges whether the shell is connected with the grounding end of the commercial power alternating-current power supply or not according to the alternating-current voltage of the zero-live wire terminal;
the output end of the controller is electrically connected with the control end of the relay, so that the controller controls the relay to disconnect the electric connection path with the electric component for commercial power when detecting that the shell is not connected with the grounding end of the commercial power alternating-current power supply.
2. The detection device according to claim 1, further comprising: a display device and/or an alarm device;
the display device is electrically connected with the controller to display the detection result output by the controller;
the alarm device is electrically connected with the controller to send out an alarm signal under the condition that the detection result indicates abnormal wiring.
3. The detection device according to claim 2, further comprising: a voltage reduction circuit; the power grounding end of the voltage reduction circuit is electrically connected with the power wiring end of the commercial power alternating-current power supply, so that the voltage reduction circuit performs voltage reduction treatment on alternating commercial power output by the commercial power alternating-current power supply;
the output end of the voltage reduction circuit is respectively and electrically connected with the power supply end of the wiring detection circuit, the power supply end of the relay and the power supply end of the controller.
4. The detection device of claim 3, wherein the wiring detection circuit comprises: first opto-isolator and second opto-isolator, wiring detection circuitry's power end includes: the first low-voltage terminal of first optical isolator with the third low-voltage terminal of second optical isolator, wiring detection circuitry's output includes: the second low-voltage terminal of first optical isolator with the fourth low-voltage terminal of second optical isolator, first wiring sense terminal includes: the first high voltage terminal of first optical isolator with the third high voltage terminal of second optical isolator, second wiring sense terminal includes: a second high voltage end of the first opto-isolator and a fourth high voltage end of the second opto-isolator;
a first high-voltage end of the first optical coupler isolator is electrically connected with a fire wire end of the relay, and a second high-voltage end of the first optical coupler isolator is electrically connected with the shell; a first low-voltage end of the first optical coupler isolator is electrically connected with an output end of the voltage reduction circuit, and a second low-voltage end of the first optical coupler isolator is electrically connected with the controller;
a third high-voltage end of the second optical coupler isolator is electrically connected with a zero line end of the relay, and a fourth high-voltage end of the second optical coupler isolator is electrically connected with the shell; the third low-voltage end of second opto-isolator with step-down circuit's output electricity is connected, the fourth low-voltage end of second opto-isolator with the controller electricity is connected, so that the controller basis the alternating voltage of second low-voltage end and fourth low-voltage end output judges the shell with whether commercial power alternating current power supply's earthing terminal is connected, or, basis the alternating voltage of second low-voltage end and fourth low-voltage end output judges whether commercial power alternating current power supply's live wire end and zero line end are connected and are had the transposition.
5. The detection device of claim 4, wherein the wiring detection circuit further comprises: the filter circuit comprises a first output resistor, a first filter resistor and a first filter capacitor;
the second low voltage end of the first optical coupler isolator is respectively electrically connected with one end of the first output resistor and one end of the first filter resistor, the other end of the first filter resistor is electrically connected with one end of the first filter capacitor, and the other end of the first output resistor and the other end of the first filter capacitor are grounded.
6. The detection device of claim 4, wherein the wiring detection circuit further comprises: the second output resistor, the second filter resistor and the second filter capacitor;
the fourth low-voltage end of the second optical coupler isolator is respectively electrically connected with one end of the second output resistor and one end of the second filter resistor, the other end of the second filter resistor is electrically connected with one end of the second filter capacitor, and the other end of the second output resistor and the other end of the second filter capacitor are grounded.
7. The detection device of claim 4, wherein the wiring detection circuit further comprises a first current limiting resistor and a second current limiting resistor;
one end of the first current limiting resistor is electrically connected with a live wire end of the relay, and the other end of the first current limiting resistor is electrically connected with a first high-voltage end of the first optocoupler isolator;
one end of the second current-limiting resistor is electrically connected with a zero line end of the relay, and the other end of the second current-limiting resistor is electrically connected with a third high-voltage end of the second optical coupler isolator.
8. A dental instrument, comprising: a mains electrical component, a housing and a dental instrument detection device as claimed in any of the preceding claims 1 to 7;
the electric component for commercial power is arranged in the shell in a contact manner;
the shell is electrically connected with a second wiring detection end of the wiring detection circuit in the detection device, and the shell is used for being electrically connected with a grounding end of a commercial power alternating current power supply.
9. A dental instrument as claimed in claim 8, wherein the housing is provided with a receiving cavity, and the mains electricity consuming component is arranged in close contact with an inner wall of the receiving cavity.
10. A dental instrument as in claim 8, wherein the electrical utility component comprises: resistance wire and insulating layer;
the insulating layer is arranged on the surface of the resistance wire in a surrounding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120901682.9U CN215067204U (en) | 2021-04-28 | 2021-04-28 | Dental instrument detection device and dental instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120901682.9U CN215067204U (en) | 2021-04-28 | 2021-04-28 | Dental instrument detection device and dental instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215067204U true CN215067204U (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120901682.9U Active CN215067204U (en) | 2021-04-28 | 2021-04-28 | Dental instrument detection device and dental instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215067204U (en) |
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2021
- 2021-04-28 CN CN202120901682.9U patent/CN215067204U/en active Active
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