CN203841715U - High-sensitivity electronic stethoscope circuit structure - Google Patents
High-sensitivity electronic stethoscope circuit structure Download PDFInfo
- Publication number
- CN203841715U CN203841715U CN201420163756.3U CN201420163756U CN203841715U CN 203841715 U CN203841715 U CN 203841715U CN 201420163756 U CN201420163756 U CN 201420163756U CN 203841715 U CN203841715 U CN 203841715U
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- China
- Prior art keywords
- resistor
- capacitor
- audion
- pin
- voltage comparator
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- Expired - Fee Related
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- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The utility model relates to a high-sensitivity electronic stethoscope circuit structure which comprises a battery, a switch, first to ninth resistors, first to fourth capacitors, a light emitting diode, a first triode, a second triode, a loudspeaker, a transformer, a voltage comparer, a rheostat and a sound pick-up, wherein the anode of the battery is connected with the first end of the switch; the second end of the switch is connected with the anode of the light emitting diode, the second end of the second resistor, the tenth pin of the voltage comparer, the second end of the eighth resistor, the second end of the ninth resistor and the second end of the rheostat; the cathode of the battery is connected with the first end of the first resistor, the first end of the loudspeaker, the sixth pin of the voltage comparer, the seventh pin of the voltage comparer, a tap of a secondary coil of the transformer, the first end of a primary coil of the transformer, the first end of the sixth resistor, the first end of the seventh resistor and the first end of the sound pick-up; the second end of the first resistor is connected with the emitting electrode of the first triode. The high-sensitivity electronic stethoscope circuit structure has the advantages of simple circuit structure, a small number of adopted electronic elements, and low cost.
Description
Technical field
This utility model relates to a kind of electronic medical equipment, relates in particular to a kind of high-flexibility electronic stethoscope circuit structure.
Background technology
Stethoscope is the most frequently used diagnosis apparatus of inside and outside woman doctor, is doctor's mark, and modern medicine starts from stethoscopic invention.Stethoscope since be applied to clinical since, profile and acoustic mode have continuous improvement, but that its basic structure changes is little, mainly by pickup part (chest piece), conduction portion (sebific duct) and audition part (ear piece) composition.And stethoscope of the prior art is all mechanization, there is no more function, therefore, there is room for improvement.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem a kind of high-flexibility electronic stethoscope circuit structure.
This utility model is achieved through the following technical solutions above-mentioned purpose:
This utility model comprises battery, switch, the first resistor to the nine resistors, the first capacitor to the four capacitors, light emitting diode, the first audion, the second audion, speaker, transformator, voltage comparator, rheostat and pick up, the positive pole of described battery is connected with the first end of described switch, the second end of described switch and the positive pole of while with described light emitting diode, the second end of described the second resistor, the tenth pin of described voltage comparator, the second end of described the 8th resistor, the second end of described the 9th resistor is connected with described rheostatic the second end, the negative pole while of described battery and the first end of described the first resistor, the first end of described speaker, the 6th pin of described voltage comparator, the 7th pin of described voltage comparator, the tap of described transformer secondary output coil, the first end of described transformer, the first end of described the 6th resistor, described the 7th first end of resistor and the first end of described pick up are connected, the second end of described the first resistor is connected with the emitter stage of described the first audion, the colelctor electrode of described the first audion is connected with the negative pole of described light emitting diode, the base stage of described the first audion is connected with the first end of described the first capacitor and the first end of described the second resistor simultaneously, the second end of described the first capacitor is connected with the second end of described speaker and the first end of described the second capacitor simultaneously, the second end of described the second capacitor is connected with the first end of described the 3rd resistor and the 9th pin of described voltage comparator simultaneously, the 4th pin of described voltage comparator is connected with the second end of described the 3rd resistor and the first end of described the 4th resistor simultaneously, the 3rd pin of described voltage comparator is connected with the first end of described the 5th resistor, the second end of described the 5th resistor is connected with the second end of described transformer secondary output coil, the second end of described the 4th resistor is connected with the first end of described transformer secondary output coil, the second end of described transformer is connected with the first end of described the 3rd capacitor, the second end of described the 3rd capacitor is connected with the second end of described the 6th resistor and the emitter stage of described the second audion simultaneously, the colelctor electrode of described the second audion is connected with the first end of described the 8th resistor, the base stage of described the second audion is connected with the first end of described the 4th capacitor, the second end while of described the 4th capacitor and the second end of described pick up, described rheostatic first end is connected with described rheostatic adjustable side, the second end of described the 7th resistor is connected with the first end of described the 9th resistor.
The beneficial effects of the utility model are:
This utility model is a kind of high-flexibility electronic stethoscope circuit structure, compared with prior art, the utlity model has circuit structure simple, adopt electronic component advantage few, with low cost, especially this utility model not only can be heard heartbeat clearly, also there is Presentation Function, facilitate the accuracy of diagnosis, highly sensitive, there is the value of promoting the use of.
Brief description of the drawings
Fig. 1 is circuit structure schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1: this utility model comprises battery E, K switch, the first resistor R1 to the nine resistor R9, the first capacitor C1 to the four capacitor C4, LED, the first audion VT1, the second audion VT2, speaker BL, transformator T, voltage comparator ic, rheostat RP and pick up BM, the positive pole of battery E is connected with the first end of K switch, the second end of K switch and the positive pole of while with LED, the second end of the second resistor R2, the tenth pin of voltage comparator ic, the second end of the 8th resistor R8, the second end of the 9th resistor R9 is connected with the second end of rheostat RP, the negative pole while of battery E and the first end of the first resistor R1, the first end of speaker BL, the 6th pin of voltage comparator ic, the 7th pin of voltage comparator ic, the tap of transformator T secondary coil, the first end of transformator T primary coil, the first end of the 6th resistor R6, the first end of the 7th resistor R7 is connected with the first end of pick up BM, the second end of the first resistor R1 is connected with the emitter stage of the first audion VT1, the first colelctor electrode of audion VT1 and the negative pole of LED are connected, the base stage of the first audion VT1 is connected with the first end of the first capacitor C1 and the first end of the second resistor R2 simultaneously, the second end of the first capacitor C1 is connected with the second end of speaker BL and the first end of the second capacitor C2 simultaneously, the second end of the second capacitor C2 is connected with the first end of the 3rd resistor R3 and the 9th pin of voltage comparator ic simultaneously, the 4th pin of voltage comparator ic is connected with the second end of the 3rd resistor R3 and the first end of the 4th resistor R4 simultaneously, the 3rd pin of voltage comparator ic is connected with the first end of the 5th resistor R5, the second end of the 5th resistor R5 is connected with the second end of transformator T secondary coil, the second end of the 4th resistor R4 is connected with the first end of transformator T secondary coil, the second end of transformator T primary coil is connected with the first end of the 3rd capacitor C3, the second end of the 3rd capacitor C3 is connected with the second end of the 6th resistor R6 and the emitter stage of the second audion VT2 simultaneously, the colelctor electrode of the second audion VT2 is connected with the first end of the 8th resistor R8, the base stage of the second audion VT2 is connected with the first end of the 4th capacitor C4, the second end while of the 4th capacitor C4 and the second end of pick up BM, the first end of rheostat RP is connected with the adjustable side of rheostat RP, the second end of the 7th resistor R7 is connected with the first end of the 9th resistor R9.
As shown in Figure 1: pick up BM is equivalent to stethoscopic can, stethoscopic receiver is equivalent to use in circuit speaker BL, stethoscope gathers patient's heartbeat by pick up BM, by speaker BL, the sound of collection is imported again into doctor's ear, wherein sound is undertaken after acoustic-electric conversion by pick up BM, through the preposition amplification of the second triode VT2, deliver to voltage comparator ic by transformator T again and carry out differential amplification, signal after amplification imports doctor's ear into by speaker BL, synchronous speaker BL of LED, heart beating is moving once, LED is once bright.
Claims (1)
1. a high-flexibility electronic stethoscope circuit structure, it is characterized in that: comprise battery, switch, the first resistor to the nine resistors, the first capacitor to the four capacitors, light emitting diode, the first audion, the second audion, speaker, transformator, voltage comparator, rheostat and pick up, the positive pole of described battery is connected with the first end of described switch, the second end of described switch and the positive pole of while with described light emitting diode, the second end of described the second resistor, the tenth pin of described voltage comparator, the second end of described the 8th resistor, the second end of described the 9th resistor is connected with described rheostatic the second end, the negative pole while of described battery and the first end of described the first resistor, the first end of described speaker, the 6th pin of described voltage comparator, the 7th pin of described voltage comparator, the tap of described transformer secondary output coil, the first end of described transformer, the first end of described the 6th resistor, described the 7th first end of resistor and the first end of described pick up are connected, the second end of described the first resistor is connected with the emitter stage of described the first audion, the colelctor electrode of described the first audion is connected with the negative pole of described light emitting diode, the base stage of described the first audion is connected with the first end of described the first capacitor and the first end of described the second resistor simultaneously, the second end of described the first capacitor is connected with the second end of described speaker and the first end of described the second capacitor simultaneously, the second end of described the second capacitor is connected with the first end of described the 3rd resistor and the 9th pin of described voltage comparator simultaneously, the 4th pin of described voltage comparator is connected with the second end of described the 3rd resistor and the first end of described the 4th resistor simultaneously, the 3rd pin of described voltage comparator is connected with the first end of described the 5th resistor, the second end of described the 5th resistor is connected with the second end of described transformer secondary output coil, the second end of described the 4th resistor is connected with the first end of described transformer secondary output coil, the second end of described transformer is connected with the first end of described the 3rd capacitor, the second end of described the 3rd capacitor is connected with the second end of described the 6th resistor and the emitter stage of described the second audion simultaneously, the colelctor electrode of described the second audion is connected with the first end of described the 8th resistor, the base stage of described the second audion is connected with the first end of described the 4th capacitor, the second end while of described the 4th capacitor and the second end of described pick up, described rheostatic first end is connected with described rheostatic adjustable side, the second end of described the 7th resistor is connected with the first end of described the 9th resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420163756.3U CN203841715U (en) | 2014-04-04 | 2014-04-04 | High-sensitivity electronic stethoscope circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420163756.3U CN203841715U (en) | 2014-04-04 | 2014-04-04 | High-sensitivity electronic stethoscope circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203841715U true CN203841715U (en) | 2014-09-24 |
Family
ID=51554790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420163756.3U Expired - Fee Related CN203841715U (en) | 2014-04-04 | 2014-04-04 | High-sensitivity electronic stethoscope circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203841715U (en) |
-
2014
- 2014-04-04 CN CN201420163756.3U patent/CN203841715U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20150404 |
|
| EXPY | Termination of patent right or utility model |