CN104622595B - A kind of impedance circuit for simulating tooth root cap cell environment - Google Patents
A kind of impedance circuit for simulating tooth root cap cell environment Download PDFInfo
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- CN104622595B CN104622595B CN201510069048.2A CN201510069048A CN104622595B CN 104622595 B CN104622595 B CN 104622595B CN 201510069048 A CN201510069048 A CN 201510069048A CN 104622595 B CN104622595 B CN 104622595B
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- signal impedance
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Abstract
The present invention relates to a kind of impedance circuit for simulating tooth root cap cell environment, including measuring A end, amplitude adjusting circuit, high-frequency signal impedance adjustment circuit, low frequency signal impedance adjustment circuit and measuring B end；Measure A end and connect one end of amplitude adjusting circuit, high-frequency signal impedance adjustment circuit is in parallel with low frequency signal impedance adjustment circuit, the other end of amplitude adjusting circuit connects one of them common port of high-frequency signal impedance adjustment circuit and low frequency signal impedance adjustment circuit, and high-frequency signal impedance adjustment circuit is connected measurement B end with another common port of low frequency signal impedance adjustment circuit.The present invention simulates the measurement environment of sono-explorer, is easier to realization relative to measuring on human body；Complicated root cap cell environment is simulated out with simple impedance circuit, can be used for detecting the quality of root canal length meter；Also be available for the research and development of root canal length meter machine, facilitate school for carrying out teaching research topics, low price, and produce simple.
Description
Technical field
The present invention relates to dentistry field, a kind of resistance for simulating tooth root cap cell environment
Reactive circuit.
Background technology
Root canal length meter (being called for short " root survey instrument ") is a kind of mouth for measuring tooth root length of tube
Chamber section auxiliary equipment, is adapted to assist in doctor and is carrying out tooth root canal pre-test teething pulp canal arrival tooth
The physical length in apex district.Root canal file is inserted in tooth root pipe when using by root canal length meter,
Then the circuit of root canal file with root canal length meter main frame is connected；Root canal length meter main frame another
One electrode is connected with the lip hook circuit hung in the oral cavity.Root canal file sends two differences in tooth root pipe
The electric current of frequency, (this ratio is not by root pipe by the ratio of the resistance value of root pipe for main frame two electric currents of measurement
The impact of Inner electrolysis matter), determine root canal file point position in root pipe.When root canal file arrives apical area,
Can show and send alarm on the main frame of root canal length meter in real time, doctor takes out root canal file and measures entrance
Physical length in tooth root pipe, just can measure tooth root pipe physical length.Carrying out root cap cell
Time root canal length meter can send a 8K high-frequency signal and a 400Hz low frequency signal at test lead,
And respectively obtaining the impedance corresponding with the two frequency, the size further according to the impedance under the two frequency is come
Check a known measurement result correspondence table, thus obtain measurement result.
Root canal length meter produces before dispatching from the factory and before doctor's use, it usually needs to root canal length meter
Measurement accuracy detect and judge, traditional method is to look for the patient of a bit test, by craft
Measure the measurement result with root canal length meter to be compared to.This traditional method of testing is accurate
Really property is poor, in measurement process, patient can cause certain misery, batch when simultaneously cannot meet production
The demand of application.
The tooth root tube simulator of existing a kind of root canal length meter test, this tube simulator
Need to use entity tooth, the sick body tooth that entity tooth usually hospital takes off from the oral cavity of patient, residual
There are substantial amounts of virus, bacterium, could use after needing to carry out disinfection, but be also possible to meeting to user's psychology
Impact, and the quantity of entity tooth cannot meet large batch of production and application.
Summary of the invention
The present invention provides a kind of impedance circuit for simulating tooth root cap cell environment, skill to be solved
Art problem is that the existing measurement accuracy to root canal length meter detects and deposits in determination methods
Poor accuracy, test patient and user are caused certain injury and use cannot be produced in enormous quantities
Problem.
The technical scheme is that a kind of for simulating tooth root cap cell
The impedance circuit of environment, including measure A end, amplitude adjusting circuit, high-frequency signal impedance adjustment circuit,
Low frequency signal impedance adjustment circuit and measurement B end；Described measurement A end and the one of described amplitude adjusting circuit
End connects, and described high-frequency signal impedance adjustment circuit is in parallel with described low frequency signal impedance adjustment circuit, institute
The other end stating amplitude adjusting circuit connects described high-frequency signal impedance adjustment circuit and described low frequency signal
One of them common port of impedance adjustment circuit, described high-frequency signal impedance adjustment circuit is believed with described low frequency
Another common port of number impedance adjustment circuit connects described measurement B end.
Described amplitude adjusting circuit, for adjusting the amplitude size of high-frequency signal and low frequency signal.
Described high-frequency signal impedance adjustment circuit, for adjusting the circuit resistance under described high-frequency signal injection
Anti-size.
Described low frequency signal impedance adjustment circuit, for adjusting the circuit resistance under described low frequency signal encourages
Anti-size.
The invention has the beneficial effects as follows: 1) use the invention to simulate sono-explorer measurement environment, phase
For measuring on human body, it is easier to realize；2) complicated root cap cell environment letter
Single impedance circuit modeling out, can be used for detecting the quality of root canal length meter；3) this
The bright research and development being available for root canal length meter machine；4) present invention facilitates school for carrying out teaching research
Problem, low price, and produce simple.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described measurement A end and described measurement B end are the binding post of described impedance circuit.
Further, described amplitude adjusting circuit includes the first resistance and the first adjustable resistance；Described first electricity
One end of resistance connects described measurement A end, and the other end connects one end of described first adjustable resistance；Described
The other end of one adjustable resistance connects described high-frequency signal impedance adjustment circuit and described low frequency signal impedance
Adjust one of them common port of circuit.
Further, described high-frequency signal impedance adjustment circuit includes electric capacity；Described electric capacity is believed with described low frequency
Number impedance adjustment circuit parallel connection.
Low frequency signal impedance adjustment circuit described further includes the second adjustable resistance and the second resistance；Described
After second adjustable resistance and described second resistant series in parallel with described high-frequency signal impedance adjustment circuit.
Accompanying drawing explanation
The theory diagram of a kind of impedance circuit for simulating tooth root cap cell environment of Fig. 1 present invention；
Fig. 2 is the circuit diagram of a kind of impedance circuit for simulating tooth root cap cell environment of the present invention.
In accompanying drawing, the list of parts representated by each label is as follows:
1, amplitude adjusting circuit, 2, high-frequency signal impedance adjustment circuit, 3, low frequency signal impedance adjusts
Circuit, R1, the first resistance, R2, the first adjustable resistance, R3, the second adjustable resistance, R4, the second electricity
Resistance, C1, electric capacity.
Detailed description of the invention
Being described principle and the feature of the present invention below in conjunction with accompanying drawing, example is served only for explaining this
Invention, is not intended to limit the scope of the present invention.
In a detailed description of the invention, as it is shown in figure 1, a kind of for simulating tooth root cap cell environment
Impedance circuit, including measuring A end, amplitude adjusting circuit 1, high-frequency signal impedance adjustment circuit 2, low
Frequently signal impedance adjusts circuit 3 and measures B end；Described measurement A end and described amplitude adjusting circuit 1
One end connects, and described high-frequency signal impedance adjustment circuit 2 is with described low frequency signal impedance adjustment circuit 3 also
Connection, the other end of described amplitude adjusting circuit 1 connects described high-frequency signal impedance adjustment circuit 2 with described
One of them common port of low frequency signal impedance adjustment circuit 3, described high-frequency signal impedance adjustment circuit 2
Described measurement B end it is connected with another common port of described low frequency signal impedance adjustment circuit 3.
Described amplitude adjusting circuit 1, for adjusting the amplitude size of high-frequency signal and low frequency signal.
Described high-frequency signal impedance adjustment circuit 2, for adjusting the circuit under described high-frequency signal injection
The size of impedance.
Described low frequency signal impedance adjustment circuit 3, for adjusting the circuit under described low frequency signal encourages
The size of impedance.
Described measurement A end and described measurement B end are the binding post of described impedance circuit.
As in figure 2 it is shown, described amplitude adjusting circuit 1 includes the first resistance R1 and the first adjustable resistance R2；
One end of described first resistance R1 connects described measurement A end, and the other end connects described first adjustable resistance
One end of R2；The other end of described first adjustable resistance R2 connects described high-frequency signal impedance adjustment circuit
2 with one of them common port of described low frequency signal impedance adjustment circuit 3.
Described high-frequency signal impedance adjustment circuit 2 includes electric capacity C1；Described electric capacity C1 believes with described low frequency
Number impedance adjustment circuit 3 is in parallel.
Described low frequency signal impedance adjustment circuit 3 includes the second adjustable resistance R3 and the second resistance R4；Institute
State the second adjustable resistance R3 and described second resistance R4 series connection after with described high-frequency signal impedance adjustment circuit
2 is in parallel.
The size of amplitude adjusting circuit 1 resistance mainly affects the amplitude model of high frequency 8KHz and low frequency 400Hz
Enclosing, the size regulating the first adjustable resistance R2 can make the signal amplitude scope of correspondence at 0.1V-2.0V
Between change.
The size of electric capacity C1 mainly affects the amplitude size of 8KHz high-frequency signal.
The size of described low frequency signal impedance adjustment circuit 3 resistance mainly affects the width of 400Hz low frequency signal
Degree, resistance is the biggest, and the impedance to 400Hz signal is the biggest；Otherwise, resistance is the least, believes 400Hz
Number impedance the least.
The present invention, by analyzing the practical impedance data of comparison entity tooth, utilizes circuit model to simulate reality
Oral environment, can as Electronic Apex Locator accuracy test detection environment use.
The when of measurement two of root canal length meter measurement lines be connected on respectively this model measurement A end and
Measure on B end.
1) during regulation electric capacity C1, relatively big to the impedance influences of 8KHz high-frequency signal, thus according to electric capacity C1
Vary in size and can obtain organizing impedance model more, desirable electric capacity C1 is 0.1uF.
2), time under electric capacity C1 is 0.1uF, the first adjustable resistance R2 is regulated, under 8KHz high-frequency signal injection
The resistance value obtained can change between 4K Ω to 15K Ω, and Changing Pattern is at 8KHz high-frequency signal injection
Under, impedance magnitude is directly proportional to the resistance of R2；And under 400Hz low frequency signal encourages, impedance magnitude base
This is constant.
3) in the case of the first adjustable resistance R2 and electric capacity C1 is fixed-size, the second adjustable resistance is regulated
R3, the resistance value obtained under 400Hz low frequency signal encourages can change between 5K Ω to 20K Ω, change
Rule is that impedance magnitude is directly proportional to the resistance of R3 under 400Hz low frequency signal encourages；And it is high at 8KHz
Frequently, under signal excitation, impedance magnitude is basically unchanged.
4) regulate electric capacity C1, the first adjustable resistance R2, the size of the second adjustable resistance R3 simultaneously, permissible
Obtain two kinds of resistance values under multiple 8KHz high-frequency signal and 400Hz low frequency signal encourage, thus simulate
Go out different root cap cell environment.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all in the present invention
Spirit and principle within, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (5)
1. the impedance circuit being used for simulating tooth root cap cell environment, it is characterised in that
Including measure A end, amplitude adjusting circuit (1), high-frequency signal impedance adjustment circuit (2),
Low frequency signal impedance adjustment circuit (3) and measurement B end；Described measurement A end and described amplitude
The one end adjusting circuit (1) connects, and described high-frequency signal impedance adjustment circuit (2) is with described
Low frequency signal impedance adjustment circuit (3) is in parallel, the other end of described amplitude adjusting circuit (1)
Connect described high-frequency signal impedance adjustment circuit (2) and described low frequency signal impedance adjustment circuit
(3) one of them common port, described high-frequency signal impedance adjustment circuit (2) is low with described
Frequently signal impedance adjusts another common port described measurement B end of connection of circuit (3)；
Described amplitude adjusting circuit (1) is big for adjusting the amplitude of high-frequency signal and low frequency signal
Little；
Described high-frequency signal impedance adjustment circuit (2), for adjusting at described high-frequency signal injection
Under the size of circuit impedance；
Described low frequency signal impedance adjustment circuit (3), encourages at described low frequency signal for adjusting
Under the size of circuit impedance.
A kind of impedance for simulating tooth root cap cell environment
Circuit, it is characterised in that described measurement A end and described measurement B end are described impedance circuit
Binding post.
The most according to claim 1 or claim 2 a kind of for simulating tooth root cap cell environment
Impedance circuit, it is characterised in that described amplitude adjusting circuit (1) includes the first resistance (R1)
With the first adjustable resistance (R2)；One end of described first resistance (R1) connects described measurement A end,
The other end connects one end of described first adjustable resistance (R2)；Described first adjustable resistance (R2)
The other end connect described high-frequency signal impedance adjustment circuit (2) and described low frequency signal impedance
Adjust one of them common port of circuit (3).
The most according to claim 1 or claim 2 a kind of for simulating tooth root cap cell environment
Impedance circuit, it is characterised in that described high-frequency signal impedance adjustment circuit (2) includes electric capacity
(C1)；Described electric capacity (C1) is in parallel with described low frequency signal impedance adjustment circuit (3).
The most according to claim 1 or claim 2 a kind of for simulating tooth root cap cell environment
Impedance circuit, it is characterised in that described low frequency signal impedance adjustment circuit (3) includes second
Adjustable resistance (R3) and the second resistance (R4)；Described second adjustable resistance (R3) and described second
Resistance (R4) is in parallel with described high-frequency signal impedance adjustment circuit (2) after connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510069048.2A CN104622595B (en) | 2015-02-10 | 2015-02-10 | A kind of impedance circuit for simulating tooth root cap cell environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510069048.2A CN104622595B (en) | 2015-02-10 | 2015-02-10 | A kind of impedance circuit for simulating tooth root cap cell environment |
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| Publication Number | Publication Date |
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| CN104622595A CN104622595A (en) | 2015-05-20 |
| CN104622595B true CN104622595B (en) | 2016-09-07 |
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| CN201510069048.2A Active CN104622595B (en) | 2015-02-10 | 2015-02-10 | A kind of impedance circuit for simulating tooth root cap cell environment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001327519A (en) * | 2000-05-24 | 2001-11-27 | Osada Res Inst Ltd | Dental root canal length measuring apparatus |
| CN100515363C (en) * | 2006-04-14 | 2009-07-22 | 赵志凌 | Root canal length measuring instrument |
| EP1642547B1 (en) * | 2004-09-30 | 2009-12-02 | W & H Dentalwerk Bürmoos GmbH | Dental handpiece having means for measuring the root canal length |
| JP2012019849A (en) * | 2010-07-13 | 2012-02-02 | Osada Res Inst Ltd | Dental root canal length measuring instrument |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4763637B2 (en) * | 2007-03-16 | 2011-08-31 | 株式会社モリタ製作所 | Root canal length measuring device and root canal treatment device |
| CN204484386U (en) * | 2015-02-10 | 2015-07-22 | 桂林市啄木鸟医疗器械有限公司 | A kind of impedance circuit for simulating tooth root pipe measurement environment |
-
2015
- 2015-02-10 CN CN201510069048.2A patent/CN104622595B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001327519A (en) * | 2000-05-24 | 2001-11-27 | Osada Res Inst Ltd | Dental root canal length measuring apparatus |
| EP1642547B1 (en) * | 2004-09-30 | 2009-12-02 | W & H Dentalwerk Bürmoos GmbH | Dental handpiece having means for measuring the root canal length |
| CN100515363C (en) * | 2006-04-14 | 2009-07-22 | 赵志凌 | Root canal length measuring instrument |
| JP2012019849A (en) * | 2010-07-13 | 2012-02-02 | Osada Res Inst Ltd | Dental root canal length measuring instrument |
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| Publication number | Publication date |
|---|---|
| CN104622595A (en) | 2015-05-20 |
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