CN204334081U - A kind of root canal length meter charging circuit with charged state feedback and display - Google Patents
A kind of root canal length meter charging circuit with charged state feedback and display Download PDFInfo
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- CN204334081U CN204334081U CN201520052691.XU CN201520052691U CN204334081U CN 204334081 U CN204334081 U CN 204334081U CN 201520052691 U CN201520052691 U CN 201520052691U CN 204334081 U CN204334081 U CN 204334081U
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Abstract
The utility model relates to a kind of root canal length meter charging circuit with charged state feedback and display, comprises lithium cell charging module, charged state detection module, single-chip microcomputer, display screen, green LED lamp driver module and yellow LED lamp driver module; The output of lithium cell charging module is connected with the input of charged state detection module; The output of charged state detection module is connected with the charged state test side of single-chip microcomputer; The data display end of single-chip microcomputer is connected with display screen; The green LED control signal end of single-chip microcomputer is connected with green LED lamp driver module; The yellow led control signal end of single-chip microcomputer is connected with yellow LED lamp driver module.The utility model by the charged state of microprocessor detect to battery, and shows corresponding pattern by display screen, informs the charged state of user's battery visually; Charging indicator light uses single-chip I/O mouth to control, and avoids yellow bright and cause mistake to indicate with green LED together with.
Description
Technical field
The utility model relates to the Circuits System technical field of power supply or distribution, especially a kind of root canal length meter charging circuit with charged state feedback and display.
Background technology
Root canal length meter (being called for short " root survey instrument ") is a kind of department of stomatology auxiliary equipment for measuring tooth root length of tube, for helping doctor before carrying out tooth root canal, measures the physical length that tooth root pipe arrives tooth apical area.Root canal file is inserted in tooth root pipe when using by root canal length meter, is then connected by the circuit of root canal file with root canal length meter main frame; Another electrode of root canal length meter main frame is linked up with circuit with the lip hung in the oral cavity and is connected.Root canal file sends the electric current of two different frequencies in tooth root pipe, and the ratio (this ratio not by the impact of root pipe Inner electrolysis matter) of two electric currents by the resistance value of root pipe measured by main frame, determines the position of root canal file point in root pipe.When root canal file arrives apical area, the main frame of root canal length meter can show in real time and give the alarm, and doctor takes out the physical length that root canal file measurement enters into tooth root pipe, just can measure tooth root pipe physical length.When root cap cell, root canal length meter can send a 8K high-frequency signal and a 400Hz low frequency signal at test lead, and obtain impedance corresponding to two frequencies respectively, then look into a known measurement result correspondence table according to the size of impedance under two frequencies thus obtain measurement result.
When root canal length meter uses rechargeable battery to power, existing charging circuit does not have electric quantity display function, only have monochromatic charging indicator light or bi-colour LED to carry out the mode indicated of charging, this mode can not demonstrate the electricity filled intuitively, and indicator light easily breaks down.
Utility model content
The utility model provides a kind of root canal length meter charging circuit with charged state feedback and display, and technical problem to be solved is the problem that the charging circuit of existing root canal length meter does not have electric quantity display function.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of root canal length meter charging circuit with charged state feedback and display, comprises lithium cell charging module, charged state detection module, single-chip microcomputer, display screen, green LED lamp driver module and yellow LED lamp driver module; The output of described lithium cell charging module is connected with the input of described charged state detection module; The output of described charged state detection module is connected with the charged state test side of described single-chip microcomputer; The data display end of described single-chip microcomputer is connected with described display screen; The green LED control signal end of described single-chip microcomputer is connected with described green LED lamp driver module; The yellow led control signal end of described single-chip microcomputer is connected with described yellow LED lamp driver module.
Lithium cell charging module is used for lithium cell charging, and charging status signal is sent to charged state detection module.
Charging status signal for detecting the charging status signal of lithium cell charging module, and is sent to single-chip microcomputer by charged state detection module.
Single-chip microcomputer, for the light on and off of the charged state the green LED lamp controlled in green LED lamp driver module and yellow LED lamp driver module and yellow led that detect charged state detection module, also sends data display simultaneously and carries out data display to display screen.
Display screen can adopt color LCD screen, for receiving data display that single-chip microcomputer sends and showing corresponding data.
Green LED lamp driver module is for driving green LED lamp, and when receiving the high level signal that single-chip microcomputer sends, green LED lamp is lit, and when receiving the low level signal that single-chip microcomputer sends, green LED lamp is extinguished.
Yellow LED lamp driver module is for driving yellow LED lamp, and when receiving the high level signal that single-chip microcomputer sends, yellow LED lamp is lit, and when receiving the low level signal that single-chip microcomputer sends, yellow LED lamp is extinguished.
The beneficial effects of the utility model are: (1) can detect the charged state of lithium battery by single-chip microcomputer, and demonstrate corresponding pattern or data by display screen, make the charged state of informing user's battery more visually.(2) green and yellow charging indicator light uses single-chip I/O mouth to control, relative to scheme indicator light is directly connected on the VA7208 output pin of lithium cell charging module, yellow risk bright together with green LED can be avoided, and then avoid causing mistake instruction.
On the basis of technique scheme, the utility model can also do following improvement.
Further, described lithium cell charging module comprises VA7208 chip, diode, the 3rd resistance, PNP type triode and lithium battery; VCC end and the EN end of described VA7208 chip are all connected the negative pole of described diode, and the positive pole of described diode connects 5V power supply adaptor; The CS end of described VA7208 chip connects the emitter of described PNP type triode, and the base stage of described PNP type triode connects the DRIVE end of described VA7208 chip, and the collector electrode of described PNP type triode connects the BAT end of described VA7208 chip; The VSS of described VA7208 chip holds ground connection, and the LEDS end of described VA7208 chip connects the input of described charged state detection module; One end of described 3rd resistance connects the negative pole of described diode, and the other end connects the emitter of described PNP type triode; The positive pole of described lithium battery connects the BAT end of described VA7208 chip, other end ground connection.
Further, described charged state detection module comprises the first resistance and the second resistance; One termination 5V power supply adaptor of described first resistance, the other end connects the output of described lithium cell charging module; One end of described second resistance connects the output of described lithium cell charging module, and the other end connects the charged state test side of described single-chip microcomputer.
Further, described green LED lamp driver module comprises the 4th resistance, the 5th resistance, the 6th resistance, green LED and the first nmos pass transistor; The positive pole of described green LED connects 5V power supply adaptor, negative pole connects one end of described 4th resistance, the other end of described 4th resistance connects the drain electrode of described first nmos pass transistor, the source ground of described first nmos pass transistor, the grid of described first nmos pass transistor connects the public connecting end of described 5th resistance and described 6th resistance, the other end ground connection of described 5th resistance, the other end of described 6th resistance connects the green LED control signal end of described single-chip microcomputer.
Further, described yellow LED lamp driver module comprises the 7th resistance, the 8th resistance, the 9th resistance, yellow light-emitting diode and the second nmos pass transistor; The positive pole of described yellow light-emitting diode connects 5V power supply adaptor, negative pole connects one end of described 7th resistance, the other end of described 7th resistance connects the drain electrode of described second nmos pass transistor, the source ground of described second nmos pass transistor, the grid of described second nmos pass transistor connects the public connecting end of described 8th resistance and described 9th resistance, the other end ground connection of described 8th resistance, the other end of described 9th resistance connects the yellow led control signal end of described single-chip microcomputer.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
In Fig. 2, the list of parts representated by each label is as follows:
1, lithium cell charging module, 2, charged state detection module, 3, green LED lamp driver module, 4, yellow LED lamp driver module, U1, VA7208 chip, D1, diode, Q1, PNP type triode, Q2, the first nmos pass transistor, Q3, the second nmos pass transistor, LED1, green LED, LED2, yellow light-emitting diode, R1, the first resistance, R2, the second resistance, R3, the 3rd resistance, R4, the 4th resistance, R5, the 5th resistance, R6, the 6th resistance, R7, the 7th resistance, R8, the 8th resistance, R9, the 9th resistance.
Embodiment
Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
In an embodiment, as shown in Figure 1 and Figure 2, there is a root canal length meter charging circuit for charged state feedback and display, comprise lithium cell charging module 1, charged state detection module 2, single-chip microcomputer, display screen, green LED lamp driver module 3 and yellow LED lamp driver module 4; The output of described lithium cell charging module 1 is connected with the input of described charged state detection module 2; The output of described charged state detection module 2 is connected with the charged state test side of described single-chip microcomputer; The data display end of described single-chip microcomputer is connected with described display screen; The green LED control signal end of described single-chip microcomputer is connected with described green LED lamp driver module 3; The yellow led control signal end of described single-chip microcomputer is connected with described yellow LED lamp driver module 4.
Charging status signal for giving lithium cell charging, and is sent to charged state detection module 2 by lithium cell charging module 1.
Charging status signal for detecting the charging status signal of lithium cell charging module 1, and is sent to single-chip microcomputer by charged state detection module 2.
Single-chip microcomputer, for the light on and off of the charged state the green LED lamp controlled in green LED lamp driver module 3 and yellow LED lamp driver module 4 and yellow led that detect charged state detection module 2, also sends data display simultaneously and carries out data display to display screen.
Display screen can adopt color LCD screen, for receiving data display that single-chip microcomputer sends and showing corresponding data.
Green LED lamp driver module 3 is for driving green LED lamp, and when receiving the high level signal that single-chip microcomputer sends, green LED lamp is lit, and when receiving the low level signal that single-chip microcomputer sends, green LED lamp is extinguished.
Yellow LED lamp driver module 4 is for driving yellow LED lamp, and when receiving the high level signal that single-chip microcomputer sends, yellow LED lamp is lit, and when receiving the low level signal that single-chip microcomputer sends, yellow LED lamp is extinguished.
Described lithium cell charging module 1 comprises VA7208 chip U1, diode D1, the 3rd resistance R3, PNP type triode Q1 and lithium battery; VCC end and the EN end of described VA7208 chip U1 are all connected the negative pole of described diode D1, and the positive pole of described diode D1 connects 5V power supply adaptor; The CS end of described VA7208 chip U1 connects the emitter of described PNP type triode Q1, and the base stage of described PNP type triode Q1 connects the DRIVE end of described VA7208 chip U1, and the collector electrode of described PNP type triode Q1 connects the BAT end of described VA7208 chip U1; The VSS of described VA7208 chip U1 holds ground connection, and the LEDS end of described VA7208 chip U1 connects the input of described charged state detection module 2; One end of described 3rd resistance R3 connects the negative pole of described diode D1, and the other end connects the emitter of described PNP type triode Q1; The positive pole of described lithium battery connects the BAT end of described VA7208 chip U1, other end ground connection.
Described charged state detection module 2 comprises the first resistance R1 and the second resistance R2; The one termination 5V power supply adaptor of described first resistance R1, the other end connects the output of described lithium cell charging module 1; One end of described second resistance R2 connects the output of described lithium cell charging module 1, and the other end connects the charged state test side of described single-chip microcomputer.
Described green LED lamp driver module 3 comprises the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, green LED LED1 and the first nmos pass transistor Q2; The positive pole of described green LED LED1 connects 5V power supply adaptor, negative pole connects one end of described 4th resistance R4, the other end of described 4th resistance R4 connects the drain electrode of described first nmos pass transistor Q2, the source ground of described first nmos pass transistor Q2, the grid of described first nmos pass transistor Q2 connects the public connecting end of described 5th resistance R5 and described 6th resistance R6, the other end ground connection of described 5th resistance R5, the other end of described 6th resistance R6 connects the green LED control signal end of described single-chip microcomputer.
Described yellow LED lamp driver module 4 comprises the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, yellow light-emitting diode LED2 and the second nmos pass transistor Q3; The positive pole of described yellow light-emitting diode LED2 connects 5V power supply adaptor, negative pole connects one end of described 7th resistance R7, the other end of described 7th resistance R7 connects the drain electrode of described second nmos pass transistor Q3, the source ground of described second nmos pass transistor Q3, the grid of described second nmos pass transistor Q3 connects the public connecting end of described 8th resistance R8 and described 9th resistance R9, the other end ground connection of described 8th resistance R8, the other end of described 9th resistance R9 connects the yellow led control signal end of described single-chip microcomputer.
The utility model is the lithium battery charging circuit for root canal length meter, and this circuit has charged state measuring ability and charged state deixis.When charging, single-chip microcomputer can monitor the state of charging at any time, and exports corresponding control signal to control the on and off of corresponding charging indicator light point, and circuit function is described below:
(1) when charging normal, after plugging 5V power supply adaptor, lithium cell charging module 1 can to lithium cell charging, charged state detection module 2 output low level is to first of single-chip microcomputer I/O port, i.e. charged state test side, at this time microprocessor detect is to this low level, represent just in charged state, and export high level by Single-chip Controlling yellow led control signal end, green LED control signal end output low level, make yellow light-emitting diode LED2 bright, green LED LED1 does not work, now, Single-chip Controlling display screen occurs that electricity bar rolls, instruction is charged.
(2) after charging terminates, charged state detection module 2 exports high level to first of single-chip microcomputer I/O port, i.e. charged state test side, tell that single-chip microcomputer charges to terminate, then Single-chip Controlling yellow led control signal end output low level, green LED control signal end export high level, and at this moment bright, the yellow light-emitting diode LED2 of green LED LED1 does not work, now, there are the full lattice of electricity bar in Single-chip Controlling display screen, instruction charging terminates.
(3) during lithium battery fault, charged state detection module 2 exports the square wave of a 4Hz to first of single-chip microcomputer I/O, i.e. charged state test side, tell single-chip microcomputer battery failure, then Single-chip Controlling yellow led control signal end and green LED control signal end alternately export high level, at this moment green LED LED1 and yellow light-emitting diode LED2 alternately flicker, pilot cell fault.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (5)
1. one kind has the root canal length meter charging circuit of charged state feedback and display, it is characterized in that, comprise lithium cell charging module (1), charged state detection module (2), single-chip microcomputer, display screen, green LED lamp driver module (3) and yellow LED lamp driver module (4); The output of described lithium cell charging module (1) is connected with the input of described charged state detection module (2); The described output of charged state detection module (2) is connected with the charged state test side of described single-chip microcomputer; The data display end of described single-chip microcomputer is connected with described display screen; The green LED control signal end of described single-chip microcomputer is connected with described green LED lamp driver module (3); The yellow led control signal end of described single-chip microcomputer is connected with described yellow LED lamp driver module (4).
2. according to claim 1 a kind of have charged state feedback and display root canal length meter charging circuit, it is characterized in that, described lithium cell charging module (1) comprises VA7208 chip (U1), diode (D1), the 3rd resistance (R3), PNP type triode (Q1) and lithium battery; VCC end and the EN end of described VA7208 chip (U1) are all connected the negative pole of described diode (D1), and the positive pole of described diode (D1) connects 5V power supply adaptor; The CS end of described VA7208 chip (U1) connects the emitter of described PNP type triode (Q1), the base stage of described PNP type triode (Q1) connects the DRIVE end of described VA7208 chip (U1), and the collector electrode of described PNP type triode (Q1) connects the BAT end of described VA7208 chip (U1); The VSS of described VA7208 chip (U1) holds ground connection, and the LEDS end of described VA7208 chip (U1) connects the input of described charged state detection module (2); One end of described 3rd resistance (R3) connects the negative pole of described diode (D1), and the other end connects the emitter of described PNP type triode (Q1); The positive pole of described lithium battery connects the BAT end of described VA7208 chip (U1), other end ground connection.
3. a kind of root canal length meter charging circuit with charged state feedback and display according to claim 1 or 2, it is characterized in that, described charged state detection module (2) comprises the first resistance (R1) and the second resistance (R2); One termination 5V power supply adaptor of described first resistance (R1), the other end connects the output of described lithium cell charging module (1); One end of described second resistance (R2) connects the output of described lithium cell charging module (1), and the other end connects the charged state test side of described single-chip microcomputer.
4. a kind of root canal length meter charging circuit with charged state feedback and display according to claim 1 or 2, it is characterized in that, described green LED lamp driver module (3) comprises the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), green LED (LED1) and the first nmos pass transistor (Q2), the positive pole of described green LED (LED1) connects 5V power supply adaptor, negative pole connects one end of described 4th resistance (R4), the other end of described 4th resistance (R4) connects the drain electrode of described first nmos pass transistor (Q2), the source ground of described first nmos pass transistor (Q2), the grid of described first nmos pass transistor (Q2) connects the public connecting end of described 5th resistance (R5) and described 6th resistance (R6), the other end ground connection of described 5th resistance (R5), the other end of described 6th resistance (R6) connects the green LED control signal end of described single-chip microcomputer.
5. a kind of root canal length meter charging circuit with charged state feedback and display according to claim 1 or 2, it is characterized in that, described yellow LED lamp driver module (4) comprises the 7th resistance (R7), the 8th resistance (R8), the 9th resistance (R9), yellow light-emitting diode (LED2) and the second nmos pass transistor (Q3), the positive pole of described yellow light-emitting diode (LED2) connects 5V power supply adaptor, negative pole connects one end of described 7th resistance (R7), the other end of described 7th resistance (R7) connects the drain electrode of described second nmos pass transistor (Q3), the source ground of described second nmos pass transistor (Q3), the grid of described second nmos pass transistor (Q3) connects the public connecting end of described 8th resistance (R8) and described 9th resistance (R9), the other end ground connection of described 8th resistance (R8), the other end of described 9th resistance (R9) connects the yellow led control signal end of described single-chip microcomputer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520052691.XU CN204334081U (en) | 2015-01-26 | 2015-01-26 | A kind of root canal length meter charging circuit with charged state feedback and display |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520052691.XU CN204334081U (en) | 2015-01-26 | 2015-01-26 | A kind of root canal length meter charging circuit with charged state feedback and display |
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| CN204334081U true CN204334081U (en) | 2015-05-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578311A (en) * | 2015-01-26 | 2015-04-29 | 桂林市啄木鸟医疗器械有限公司 | Charging circuit for root canal length measuring instrument and charging state feedback and display method |
| CN105844868A (en) * | 2016-05-24 | 2016-08-10 | 上海海事大学 | Anti-loss USB flash disk with characteristic of bluetooth searching |
-
2015
- 2015-01-26 CN CN201520052691.XU patent/CN204334081U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578311A (en) * | 2015-01-26 | 2015-04-29 | 桂林市啄木鸟医疗器械有限公司 | Charging circuit for root canal length measuring instrument and charging state feedback and display method |
| CN104578311B (en) * | 2015-01-26 | 2017-02-22 | 桂林市啄木鸟医疗器械有限公司 | Charging circuit for root canal length measuring instrument and charging state feedback and display method |
| CN105844868A (en) * | 2016-05-24 | 2016-08-10 | 上海海事大学 | Anti-loss USB flash disk with characteristic of bluetooth searching |
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