CN204666232U - A kind of ultrasonic instrument calibration circuit for cubic content measurement - Google Patents
A kind of ultrasonic instrument calibration circuit for cubic content measurement Download PDFInfo
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- CN204666232U CN204666232U CN201520321935.XU CN201520321935U CN204666232U CN 204666232 U CN204666232 U CN 204666232U CN 201520321935 U CN201520321935 U CN 201520321935U CN 204666232 U CN204666232 U CN 204666232U
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Abstract
The utility model discloses a kind of ultrasonic instrument calibration circuit for cubic content measurement, comprise the signal acquisition circuit be connected with high level with signal end, signal acquisition circuit with the first amplifier for core is formed, signal acquisition circuit realizes adjusting by control first triode and the second triode the change of duty of Circuit tuning, Circuit tuning of adjusting is formed for core with the second amplifier, the output port that the output terminal of Circuit tuning of adjusting exports as calibration reference signal.The utility model can improve the deficiencies in the prior art, achieves the automatic testing calibration of ultrasonic measurement circuit.
Description
Technical field
The utility model relates to technical field of ultrasonic application, especially a kind of ultrasonic instrument calibration circuit for cubic content measurement.
Background technology
Ultrasound wave is a kind of frequency higher than the sound wave of 20000 hertz, and its good directionality, penetration capacity is strong, is easy to obtain the acoustic energy comparatively concentrated.Utilize hyperacoustic These characteristics, ultrasound wave can be utilized to carry out indirect inspection to capacity, very practical for some space that cannot directly measure.The accuracy of ultrasonic measurement is directly subject to the impact of its testing circuit, if the drift of testing circuit generation reference point, so its testing result just cannot ensure its accuracy.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of ultrasonic instrument calibration circuit for cubic content measurement, can solve the deficiencies in the prior art, achieves the automatic testing calibration of ultrasonic measurement circuit.
For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows.
A kind of ultrasonic instrument calibration circuit for cubic content measurement, signal end is connected to the positive input of the first amplifier by the second resistance, high level is connected to the reverse input end of the first amplifier by the first resistance, the reverse input end of the first amplifier is connected to the output terminal of the first amplifier by the 3rd resistance, the positive input of the first amplifier is connected to the output terminal of the first amplifier by the second electric capacity, the positive input of the first amplifier is by the 4th resistance in parallel and the second inductance ground connection, the output terminal of the first amplifier is connected to the base stage of the first triode by the tenth resistance, the collector of the first triode is connected to high level by the 5th resistance of series connection and the first electric capacity, the emitter of the first triode is connected to the base stage of the second triode by the 6th resistance, the collector of the second triode is connected to high level by the 7th resistance of series connection and the first inductance, the emitter of the second triode is connected to the reverse input end of the second amplifier by the 8th resistance, the positive input of the second amplifier is by the 5th capacity earth, the two ends of the 8th resistance are parallel with the 3rd electric capacity, the reverse input end of the second amplifier is connected to the output terminal of the second amplifier by the 9th resistance of series connection and the 4th electric capacity, the output terminal of the second amplifier is connected to control end.
The beneficial effect adopting technique scheme to bring is: the utility model carries out sampling contrast by the first amplifier to detection signal, then utilize the second amplifier to adjust adjustment to sampling comparing result, the output signal of the second amplifier exports as calibration reference signal.First amplifier carries out feedback regulation for sampled signal, can improve the accuracy of sampled signal.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model embodiment.
In figure: 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; R10, the tenth resistance; C1, the first electric capacity; C2, the second electric capacity; C3, the 3rd electric capacity; C4, the 4th resistance; C5, the 5th resistance; L1, the first inductance; L2, the second inductance; Q1, the first triode; Q2, the second triode; A1, the first amplifier; A2, the second amplifier; VCC, high level; S, output terminal; Ct, control end.
Embodiment
With reference to Fig. 1, the signal end S of the utility model embodiment is connected to the positive input of the first amplifier A1 by the second resistance R2, high level VCC is connected to the reverse input end of the first amplifier A1 by the first resistance R1, the reverse input end of the first amplifier A1 is connected to the output terminal of the first amplifier A1 by the 3rd resistance R3, the positive input of the first amplifier A1 is connected to the output terminal of the first amplifier A1 by the second electric capacity C2, the positive input of the first amplifier A1 is by the 4th resistance R4 in parallel and the second inductance L 2 ground connection, the output terminal of the first amplifier A1 is connected to the base stage of the first triode Q1 by the tenth resistance R10, the collector of the first triode Q1 is connected to high level VCC by the 5th resistance R5 of series connection and the first electric capacity C1, the emitter of the first triode Q1 is connected to the base stage of the second triode Q2 by the 6th resistance R6, the collector of the second triode Q2 is connected to high level VCC by the 7th resistance R7 of series connection and the first inductance L 1, the emitter of the second triode Q2 is connected to the reverse input end of the second amplifier A2 by the 8th resistance R8, the positive input of the second amplifier A2 is by the 5th electric capacity C5 ground connection, the two ends of the 8th resistance R8 are parallel with the 3rd electric capacity C3, the reverse input end of the second amplifier A2 is connected to the output terminal of the second amplifier A2 by the 9th resistance R9 of series connection and the 4th electric capacity C4, the output terminal of the second amplifier A2 is connected to control end Ct.The present embodiment carries out sampling contrast by the first amplifier to detection signal, and then utilize the second amplifier to adjust adjustment to sampling comparing result, the output signal of the second amplifier exports as calibration reference signal.First amplifier carries out feedback regulation for sampled signal, can improve the accuracy of sampled signal.
Wherein, first resistance R1 is 70k Ω, second resistance R2 is 150k Ω, and the 3rd resistance R3 is 45k Ω, and the 4th resistance R4 is 500k Ω, 5th resistance R5 is 120k Ω, 6th resistance R6 is 30k Ω, and the 7th resistance R7 is 80k Ω, and the 8th resistance R8 is 67k Ω, 9th resistance R9 is 100k Ω, and the tenth resistance R10 is 50k Ω.First electric capacity C1 is 70 μ F, and the second electric capacity C2 is 130 μ F, and the 3rd electric capacity C3 is 40 μ F, and the 4th electric capacity C4 is 80 μ F, and the 5th electric capacity C5 is 230 μ F, and the first inductance L 1 is 1.5mH, and the second inductance L 2 is 2mH.
More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1. the ultrasonic instrument calibration circuit for cubic content measurement, it is characterized in that: signal end (S) is connected to the positive input of the first amplifier (A1) by the second resistance (R2), high level (VCC) is connected to the reverse input end of the first amplifier (A1) by the first resistance (R1), the reverse input end of the first amplifier (A1) is connected to the output terminal of the first amplifier (A1) by the 3rd resistance (R3), the positive input of the first amplifier (A1) is connected to the output terminal of the first amplifier (A1) by the second electric capacity (C2), the positive input of the first amplifier (A1) is by the 4th resistance (R4) in parallel and the second inductance (L2) ground connection, the output terminal of the first amplifier (A1) is connected to the base stage of the first triode (Q1) by the tenth resistance (R10), the collector of the first triode (Q1) is connected to high level (VCC) by the 5th resistance (R5) of series connection and the first electric capacity (C1), the emitter of the first triode (Q1) is connected to the base stage of the second triode (Q2) by the 6th resistance (R6), the collector of the second triode (Q2) is connected to high level (VCC) by the 7th resistance (R7) of series connection and the first inductance (L1), the emitter of the second triode (Q2) is connected to the reverse input end of the second amplifier (A2) by the 8th resistance (R8), the positive input of the second amplifier (A2) is by the 5th electric capacity (C5) ground connection, the two ends of the 8th resistance (R8) are parallel with the 3rd electric capacity (C3), the reverse input end of the second amplifier (A2) is connected to the output terminal of the second amplifier (A2) by the 9th resistance (R9) of series connection and the 4th electric capacity (C4), the output terminal of the second amplifier (A2) is connected to control end (Ct).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520321935.XU CN204666232U (en) | 2015-05-19 | 2015-05-19 | A kind of ultrasonic instrument calibration circuit for cubic content measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520321935.XU CN204666232U (en) | 2015-05-19 | 2015-05-19 | A kind of ultrasonic instrument calibration circuit for cubic content measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204666232U true CN204666232U (en) | 2015-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520321935.XU Expired - Fee Related CN204666232U (en) | 2015-05-19 | 2015-05-19 | A kind of ultrasonic instrument calibration circuit for cubic content measurement |
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| Country | Link |
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| CN (1) | CN204666232U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109794405A (en) * | 2019-02-18 | 2019-05-24 | 河南中医药大学 | High intensity focused ultrasound signal calibration circuit |
-
2015
- 2015-05-19 CN CN201520321935.XU patent/CN204666232U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109794405A (en) * | 2019-02-18 | 2019-05-24 | 河南中医药大学 | High intensity focused ultrasound signal calibration circuit |
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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: 20150923 Termination date: 20210519 |
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| CF01 | Termination of patent right due to non-payment of annual fee |