CN216318166U - Tooth vitality testing circuit and load vitality tester - Google Patents
Tooth vitality testing circuit and load vitality tester Download PDFInfo
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- CN216318166U CN216318166U CN202122004269.5U CN202122004269U CN216318166U CN 216318166 U CN216318166 U CN 216318166U CN 202122004269 U CN202122004269 U CN 202122004269U CN 216318166 U CN216318166 U CN 216318166U
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Abstract
The embodiment of the utility model provides a tooth vitality testing circuit and a load vitality tester, and relates to the technical field of medical instruments. The tooth vitality testing circuit comprises a rectifying unit and a resistance-capacitance unit, wherein the rectifying unit is used for being electrically connected with one end of a load, the resistance-capacitance unit is used for being electrically connected with the other end of the load, and the rectifying unit is used for being connected with a power supply. The resistance-capacitance unit is connected in series with the load, under the condition that the rectifying unit outputs the pulse signals of the same grade, the current difference of the loads flowing through different impedances is not large, namely, under the pulse signals of the same grade, in the process of detecting the loads of different impedances, the detected current value difference is small, the detected current values of the loads of different impedances can be considered to be the same, and therefore the detection accuracy of the load activity is improved.
Description
Technical Field
The utility model relates to the technical field of load detection, in particular to a tooth vitality testing circuit and a load vitality tester.
Background
The tooth vitality test mainly stimulates nerve fibers in a tooth-dentin junction area through current, so that a certain stimulation response is generated by the affected tooth, and effective diagnostic information is provided. Clinically, the magnitude of the nerve stimulation of the teeth is related to the magnitude of the current. Due to the different tooth morphologies, the impedance varies from tooth to tooth. At present, under the same level of pulse signals, the current flowing through teeth with different impedances is different, the tooth nerve reaction is also different, that is to say, the current generated by different teeth is different, so that the accuracy of tooth activity test is lower.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a tooth vitality testing circuit and a load vitality tester, which can detect teeth with different impedances and ensure constant current, thereby improving the tooth vitality testing precision.
Embodiments of the utility model may be implemented as follows:
in a first aspect, embodiments of the present invention provide a tooth vitality testing circuit, including: the rectifying unit is used for being electrically connected with one end of a load, the resistance-capacitance unit is used for being electrically connected with the other end of the load, and the rectifying unit is used for being connected with a power supply.
In an optional embodiment of the present invention, the rc unit includes a first resistor and a capacitor, and after the first resistor is connected in parallel with the capacitor, one end of the first resistor is electrically connected to the load, and the other end of the first resistor is grounded.
In an optional embodiment of the present invention, the tooth vitality testing circuit further includes a detection unit, a connection point is provided between the load and the rectifying unit, and the detection unit is electrically connected to the connection point and is configured to detect whether the load is powered up.
In an optional embodiment of the present invention, the detecting unit is a comparator, a negative input end of the detecting unit is connected to the connection point, a positive input end of the detecting unit is grounded, and an output end of the detecting unit is used for being electrically connected to the detector.
In an alternative embodiment of the present invention, the output end of the detection unit is electrically connected to the positive input end of the detection unit.
In an optional embodiment of the present invention, the tooth vitality testing circuit further includes a voltage reduction resistor, and the voltage reduction resistor is connected in series between the output end of the detection unit and the positive input end of the detection unit.
In an alternative embodiment of the present invention, a detection point is provided between the connection point and the detection unit, and the detection point is used for being electrically connected with a detection power supply.
In an alternative embodiment of the utility model, the tooth vitality testing circuit further comprises a first diode, an anode of the first diode is connected with the detection point, and a cathode of the first diode is connected with the connection point.
In an optional embodiment of the present invention, the tooth vitality testing circuit further includes a second diode, an anode of the second diode is connected to the rectifying unit, and a cathode of the second diode is used for electrically connecting to the load.
In a second aspect, embodiments of the present invention provide a load activity tester, which includes the tooth activity test circuit provided in the first aspect.
The embodiment of the utility model has the following beneficial effects: the tooth vitality testing circuit comprises a rectifying unit and a resistance-capacitance unit, wherein the rectifying unit is used for being electrically connected with one end of a load, the resistance-capacitance unit is used for being electrically connected with the other end of the load, and the rectifying unit is used for being connected with a power supply. The resistance-capacitance unit is connected in series with the load, under the condition that the rectifying unit outputs the pulse signals of the same grade, the current difference of the loads flowing through different impedances is not large, namely, under the pulse signals of the same grade, in the process of detecting the loads of different impedances, the detected current value difference is small, the detected current values of the loads of different impedances can be considered to be the same, and therefore the detection accuracy of the load activity is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed 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 circuit diagram of a tooth vitality testing circuit according to a first embodiment of the present invention.
Icon: 100-a tooth viability test circuit; 110-a rectifying unit; 120-a resistance-capacitance unit; r1 — first resistance; c1-capacitance; 130-a detection unit; v1-negative input; v2 — positive input; v3 — output; d1 — first diode; d2 — second diode; r2 — second resistance; r0-voltage dropping resistor; 200-load; 140-a connection point; 150-detection point.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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 invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", 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 placed when the utility model is used, it is only for convenience of describing the present invention and simplifying the description, but it is not necessary to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, it should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
First embodiment
Referring to fig. 1, the present embodiment provides a circuit 100 for testing tooth vitality, and the circuit 100 for testing tooth vitality can detect teeth with different impedances and ensure constant current, thereby improving the accuracy of testing tooth vitality.
The tooth vitality test mainly stimulates nerve fibers in a tooth-dentin junction area through current, so that a certain stimulation response is generated by the affected tooth, and effective diagnostic information is provided. Clinically, the magnitude of the nerve stimulation of the teeth is related to the magnitude of the current. Due to the different tooth morphologies, the impedance varies from tooth to tooth. At present, under the same level of pulse signals, the current flowing through teeth with different impedances is different, the tooth nerve reaction is also different, that is to say, the current generated by different teeth is different, so that the accuracy of tooth activity test is lower. The circuit 100 for testing tooth vitality provided by the embodiment can improve the above problem, and can ensure that the current flowing through the teeth with different impedances is constant under the same level of pulse signals, thereby improving the testing precision of tooth vitality.
In this embodiment, the load 200 is a tooth.
In this embodiment, the tooth vitality testing circuit 100 includes: the rectifier unit 110 is electrically connected with one end of the load 200, the resistor-capacitor unit 120 is electrically connected with the other end of the load 200, and the rectifier unit 110 is connected with a power supply.
In this embodiment, the load 200 is connected in series with a resistor-capacitor unit 120, and under the condition that the rectifying unit 110 outputs the pulse signals of the same level, the current differences flowing through the loads 200 with different impedances are not large, that is, in the process of detecting the loads 200 with different impedances, the detected current values are small, and the current values detected by the loads 200 with different impedances can be considered to be substantially the same, so that the detection accuracy of the activity of the loads 200 is improved.
In the embodiment, the rc unit 120 includes a first resistor R1 and a capacitor C1, wherein the first resistor R1 is connected in parallel with the capacitor C1, and then one end of the first resistor R1 is electrically connected to the load 200, and the other end of the first resistor R is grounded.
In this embodiment, when testing loads 200 with different impedances, under the cooperation of the first resistor R1 and the capacitor C1, the capacitor C1 can start the action of the supplementary voltage on the load 200, so as to reduce the current difference between the loads 200 with different impedances, and make the current values detected by the loads 200 with different impedances substantially the same, thereby improving the detection accuracy of the activity of the load 200.
In this embodiment, the tooth vitality testing circuit 100 further includes a detecting unit 130, a connection point 140 is provided between the load 200 and the rectifying unit 110, and the detecting unit 130 is electrically connected to the connection point 140 and is configured to detect whether the load 200 is powered on.
In the present embodiment, the detecting unit 130 is mainly used to detect whether the load 200 is connected into the tooth vitality testing circuit 100, and the detection of the vitality of the load 200 can be started under the condition that the load 200 is connected into the tooth vitality testing circuit 100. If the load 200 is not connected to the load 200 activity detection circuit, the load 200 activity detection is stopped.
In this embodiment, the detecting unit 130 is a comparator, the negative input terminal V1 of the detecting unit 130 is connected to the connection point 140, the positive input terminal V2 of the detecting unit 130 is grounded, and the output terminal V3 of the detecting unit 130 is used for electrically connecting to the detector. The output terminal V3 of the detection unit 130 is electrically connected to the positive input terminal V2 of the detection unit 130. The tooth vitality testing circuit 100 further includes a voltage-reducing resistor R0, and the voltage-reducing resistor R0 is connected in series between the output terminal V3 of the detecting unit 130 and the positive input terminal V2 of the detecting unit 130. A detection point 150 is provided between the connection point 140 and the detection unit 130, and the detection point 150 is electrically connected to a detection power source.
In the present embodiment, if the load 200 is connected to the tooth vitality testing circuit 100, the negative input terminal V1 of the detecting unit 130 is at a low level, and since the positive input terminal V2 is connected to the output terminal V3, the positive input terminal V2 inputs a high level, and thus the output of the output terminal V3 is at a high level, which is detected by the detector as a high level.
If the load 200 is not connected to the circuit 100, the negative input terminal V1 outputs a high level, and the corresponding output terminal V3 outputs a low level, then the detector detects a low level.
That is, when the detector detects a high level, it indicates that the load 200 is connected to the tooth vitality testing circuit 100, and when the detector detects a low level, it indicates that the load 200 is not connected to the tooth vitality testing circuit 100, and it is possible to determine whether the load 200 is connected to the tooth vitality testing circuit 100 according to the level detected by the detector.
The number of the step-down resistors R0 is not particularly limited, and may be one or two, and when there are a plurality of step-down resistors R0, a plurality of step-down resistors R0 are connected in series.
In this embodiment, the circuit 100 further includes a first diode D1, the positive terminal of the first diode D1 is connected to the detecting point 150, and the negative terminal of the first diode D1 is connected to the connecting point 140.
The main function of the first diode D1 is to prevent the current of the power supply from flowing back.
In this embodiment, the tooth vitality testing circuit 100 further includes a second diode D2, an anode of the second diode D2 is connected to the rectifying unit 110, and a cathode of the second diode D2 is used for electrically connecting to the load 200.
Also, the main function of the second diode D2 is to prevent the current of the power supply from flowing back.
In this embodiment, the tooth vitality testing circuit 100 further includes a second resistor R2, and the second resistor R2 is connected in series between the cathode of the second diode D2 and the load 200.
It should be noted that, in the present embodiment, the rectifying unit 110 is a signal amplifier.
The tooth vitality testing circuit 100 provided in this embodiment: in this embodiment, a resistor-capacitor unit 120 is connected in series to the load 200, and under the condition that the rectifying unit 110 outputs the pulse signals of the same level, the current differences of the loads 200 with different impedances are not large, that is, in the process of detecting the loads 200 with different impedances under the pulse signals of the same level, the detected current values are small, and the current values detected by the loads 200 with different impedances can be considered to be substantially the same, so that the detection accuracy of the activity of the loads 200 is improved.
Second embodiment
The embodiment provides a load 200 activity tester, and the load 200 activity tester provided by the embodiment can ensure constant current while detecting teeth with different impedances, so that the test precision of the tooth activity is improved.
For the sake of brief description, where this embodiment is not mentioned, reference may be made to the first embodiment.
In the present embodiment, the load 200 vitality tester includes the tooth vitality testing circuit 100 provided in the first embodiment.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A tooth viability test circuit, comprising: the rectifying unit is electrically connected with one end of a load, the resistance-capacitance unit is electrically connected with the other end of the load, and the rectifying unit is connected with a power supply; the resistance-capacitance unit comprises a first resistor and a capacitor, wherein one end of the first resistor is electrically connected with the load after being connected with the capacitor in parallel, and the other end of the first resistor is grounded.
2. The circuit for testing tooth vitality as claimed in claim 1, further comprising a detecting unit, wherein the load and the rectifying unit have a connection point therebetween, and the detecting unit is electrically connected to the connection point for detecting whether the load is powered on.
3. The circuit for testing tooth vitality as claimed in claim 2, wherein the detecting unit is a comparator, a negative input terminal of the detecting unit is connected to the connection point, a positive input terminal of the detecting unit is grounded, and an output terminal of the detecting unit is used for being electrically connected to the detector.
4. The circuit for testing tooth vitality as claimed in claim 3, wherein the output terminal of the detecting unit is electrically connected to the positive input terminal of the detecting unit.
5. The circuit of claim 4, further comprising a voltage dropping resistor connected in series between the output of the detection unit and the positive input of the detection unit.
6. A circuit for testing tooth vitality as claimed in claim 2, wherein a test point is provided between the connection point and the test unit, and the test point is electrically connected to a test power source.
7. The tooth viability test circuit of claim 6, further comprising a first diode, an anode of the first diode being connected to the detection point and a cathode of the first diode being connected to the connection point.
8. The circuit of claim 1, further comprising a second diode, wherein an anode of the second diode is connected to the rectifying unit and a cathode of the second diode is configured to be electrically connected to the load.
9. A load viability tester, wherein the load viability tester comprises a tooth viability testing circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122004269.5U CN216318166U (en) | 2021-08-24 | 2021-08-24 | Tooth vitality testing circuit and load vitality tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122004269.5U CN216318166U (en) | 2021-08-24 | 2021-08-24 | Tooth vitality testing circuit and load vitality tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216318166U true CN216318166U (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122004269.5U Active CN216318166U (en) | 2021-08-24 | 2021-08-24 | Tooth vitality testing circuit and load vitality tester |
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| Country | Link |
|---|---|
| CN (1) | CN216318166U (en) |
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2021
- 2021-08-24 CN CN202122004269.5U patent/CN216318166U/en active Active
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