CN107049320B - A kind of flap Thickness sensitivity circuit and system - Google Patents
A kind of flap Thickness sensitivity circuit and system Download PDFInfo
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- CN107049320B CN107049320B CN201710037744.4A CN201710037744A CN107049320B CN 107049320 B CN107049320 B CN 107049320B CN 201710037744 A CN201710037744 A CN 201710037744A CN 107049320 B CN107049320 B CN 107049320B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
- A61B5/1072—Measuring physical dimensions, e.g. size of the entire body or parts thereof measuring distances on the body, e.g. measuring length, height or thickness
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
- A61B5/725—Details of waveform analysis using specific filters therefor, e.g. Kalman or adaptive filters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
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Abstract
The invention discloses a kind of flap Thickness sensitivity circuit and systems, and wherein flap Thickness sensitivity circuit includes induction coil, magnitude extraction circuit, filter circuit and digital measuring circuit, wherein induction coil, the mutual inductance for inductive sensor coupling circuit change；Magnitude extraction circuit is connected with induction coil, for that will extract the amplitude of AC signal, and becomes direct current signal；Filter circuit is connected with detecting circuit, for filtering out the high fdrequency component of direct current signal, keeps signal more smooth, digital measuring circuit is connected with filter circuit, for filtered signal to be converted into digital signal, and saves in a register.The present invention is used to measure the implantable medical device for carrying out signal energy transmission using inductive coupling mode, it can be in the case where not influencing inductive coupling circuit normal work using the circuit, auto-real-time monitoring is carried out to flap thickness, entire circuit has the advantages that low in energy consumption, to be easily integrated.
Description
Technical field
The invention belongs to implantable medical devices field, in particular to a kind of flap Thickness sensitivity circuit and system.
Background technique
It is well known that Inductive coupling techniques have extensive use in implantable medical devices, which is able to carry out letter
Number transmission, the functions such as wireless charging, particularly, for electronics implantable medical devices, which need implant no longer
Battery is wanted, and fully relies on external component power supply, the service life of implant can be greatly improved.
It in actual application, a use of problem of Inductive coupling techniques is sufferer flap in implantable medical devices
Thickness is related to inductive coupling coefficient and energy transmission efficiency, and medical instrument user with age, weight and gender not
Together, the flap thickness difference opposite sex is very big, and inductive coupling circuit is designed in this way, and the design of especially transmit circuit proposes very
High requirement, in the case where unknown flap thickness information, the person of being typically designed can only be sent with maximum power, it is ensured that skin
The thicker patient of valve thickness can the normal use medical instrument, but caused for most patients in this way it is unnecessary
Energy dissipation, reduce service time of battery, therefore, for implantable medical devices, can accurately obtain flap thickness
Information is extremely important.
Summary of the invention
It, can be using the circuit in view of this, the purpose of the present invention is to provide flap Thickness sensitivity circuit and system
In the case where not influencing inductive coupling circuit normal work, auto-real-time monitoring is carried out to flap thickness, entire circuit has power consumption
It is low, the advantages that being easily integrated.
In order to achieve the above objectives, it the present invention provides a kind of flap Thickness sensitivity circuit, includes at least: induction coil, width
Value extracts circuit, filter circuit and digital measuring circuit, wherein
The output of the induction coil is connected with the input that circuit is extracted in the duplication, and output is AC signal, letter
Number amplitude changes with the monotonic intensity sensed；
The magnitude extraction circuit, the maximum amplitude of the AC signal for retaining the induction coil received output, and
The amplitude is become into DC level as output；
The filter circuit is connected with magnitude extraction circuit, for carrying out the high fdrequency component of the output of magnitude extraction circuit
Filtering, the DC level of output smoothing；
The digital measuring circuit, including analog to digital conversion circuit, clock control circuit and register, wherein
Analog-digital conversion circuit as described is connected with filter circuit, and the DC level that filter circuit exports is become corresponding number
Signal；
The clock control circuit is connected with analog to digital conversion circuit and register, provides for analog to digital conversion circuit using the time
With control switch signal, and clock signal is provided for register；
The register is connected with analog to digital conversion circuit, for saving the digital signal after measuring.
Preferably, the magnitude extraction circuit is all-wave or half-wave rectifying circuit.
Preferably, the measurement accuracy of analog-digital conversion circuit as described is 2~18 bits.
Preferably, the supply voltage of analog-digital conversion circuit as described is 1.8~3.3 volts.
Preferably, the clock sampling frequency of analog-digital conversion circuit as described is 10K~10M hertz.
Based on above-mentioned purpose, the present invention also provides a kind of systems using above-mentioned flap Thickness sensitivity circuit, further include
Inductive coupling circuit, wherein
The inductive coupling circuit includes radio-frequency signal generator, transmitting resonance circuit and reception resonance circuit, wherein
The radio-frequency signal generator is connected with transmitting resonance circuit, for the radiofrequency signal for needing to issue to be conveyed to hair
Penetrate resonance circuit；
The transmitting resonance circuit, including connected transmitting coil and series resonant capacitance, wherein
Transmitting coil is used to give emission of radio frequency signals to reception resonance circuit；
Series resonant capacitance is used to form resonance circuit with transmitting coil, filters out other frequency noises；
The reception resonance circuit, including connected receiving coil and parallel resonance capacitor, wherein
Receiving coil is connected in the heart with transmitting coil, the signal issued for receiving transmitting resonance circuit；
Parallel resonance capacitor is used to form resonance circuit with receiving coil, filters out other frequency noises.
Preferably, the induction coil and transmitting coil place the heart, and and transmitting coil in same printed circuit board
On, induction coil inductance value is less than the 1/8 of the inductance value of transmitting coil and receiving coil.
Preferably, the amplitude output signal of the radio-frequency signal generator is 10~20 volts.
The beneficial effects of the present invention are: the circuit is fully located at the transmitting coil being easy in vitro with inductive coupling circuit
Merge on same printed circuit board, it is low in energy consumption, it is easily integrated, is advantageously implemented the miniaturization of extracorporeal circuit.The circuit stability
Reliably, easily operated, digitlization is realized, flap information can be recorded in real time, is also beneficial to other circuit extraction flap information.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing and carries out
Illustrate:
Fig. 1 is the entire block diagram of a specific application example in the flap Thickness sensitivity circuit of the embodiment of the present invention；
Fig. 2 is the specific block diagram of a specific application example in the flap thickness detecting system of the embodiment of the present invention；
Fig. 3 is the circuit diagram of a specific application example in the flap thickness detecting system of the embodiment of the present invention；
Fig. 4 is the transmitting coil and the line of induction of a specific application example in the flap thickness detecting system of the embodiment of the present invention
Enclose schematic layout pattern on a printed circuit；
Fig. 5 is that the different flap thickness of a specific application example in the flap Thickness sensitivity circuit of the embodiment of the present invention are corresponding
Signal waveform compares figure.
Specific embodiment
Below in conjunction with attached drawing, a preferred embodiment of the present invention will be described in detail.
Referring to Fig. 1-3, it show entire block diagram, the specific frame of system of the flap Thickness sensitivity circuit 10 of the embodiment of the present invention
Figure and circuit diagram, wherein
Flap Thickness sensitivity circuit 10, includes at least: induction coil 110, magnitude extraction circuit 120,130 and of filter circuit
Digital measuring circuit 140, wherein
Mutual inductance of the induction coil 110 for transmitting coil 221 and receiving coil 231 in inductive sensor coupling circuit 20
Variation exports as AC signal VSENSE, and signal amplitude can be with transmitting coil 221 and 231 distance change of receiving coil
And it is monotonically changed；
The magnitude extraction circuit 120 is connected with induction coil 110, by first diode D1, first capacitor C1, the second electricity
Hold C2 and 3rd resistor R3 to compose in parallel, second one end capacitor C2 is connect with 3rd resistor R3, and the other end is grounded GND1.Amplitude mentions
Sense circuit 120 is used to retain the maximum amplitude of AC signal, filters out a part of high-frequency signal, and the amplitude is become DC level
VIN is as output；
The filter circuit 130 is connected with magnitude extraction circuit 120, for by the high frequency division of the output of magnitude extraction circuit
Amount is filtered, the DC level of output smoothing；
The digital measuring circuit 140, including analog to digital conversion circuit 141, clock control circuit 142 and register 143,
In,
Analog-digital conversion circuit as described 141 is connected with filter circuit 130, and the DC level that filter circuit exports is become corresponding
Digital signal；
The clock control circuit 142 is connected with analog to digital conversion circuit 141 and register 143, is analog to digital conversion circuit 141
It provides and uses time and control switch signal, and provide clock signal for register 143；
The register 143 is connected with analog to digital conversion circuit 141, for saving the digital signal after measuring.
Based on above-mentioned purpose, referring to Fig. 3, it show the circuit of the system 100 using the flap Thickness sensitivity circuit
Schematic diagram, including flap Thickness sensitivity circuit 10 and inductive coupling circuit 20, wherein
The inductive coupling circuit 20 includes radio-frequency signal generator 210, transmitting resonance circuit 220 and reception resonance circuit
230, wherein
The radio-frequency signal generator 210 is connected with transmitting resonance circuit 220, and the radiofrequency signal for that will need to issue is defeated
Give transmitting resonance circuit 220；
The transmitting resonance circuit 220, including concatenated transmitting coil 221 and series resonant capacitance 222, specific embodiment
In can also include first resistor R1, connect with series resonant capacitance 222, wherein
Transmitting coil 221 is used to give emission of radio frequency signals to reception resonance circuit 230；
Series resonant capacitance 222 is used to form resonance circuit with transmitting coil, filters out other frequency noises；
The reception resonance circuit 230, including receiving coil 231 and parallel resonance capacitor 232 in parallel, specific embodiment
In can also include second resistance R2, it is in parallel with parallel resonance capacitor 232, one end ground connection GND2, wherein
Receiving coil 231 is connected in the heart with transmitting coil 221, the signal issued for receiving transmitting resonance circuit 220；
Parallel resonance capacitor 232 is used to form resonance circuit with receiving coil 231, filters out other frequency noises.
Referring to fig. 4, transmitting coil 221 and induction coil 110 schematic layout pattern on a printed circuit, the sense are shown
It answers coil 110 and transmitting coil 221 to place the heart, and with transmitting coil 221 in same printed circuit board, but is located at difference
Circuit layer, 110 inductance value of induction coil is less than the 1/8 of the inductance value of transmitting coil 221 and receiving coil 231.
Further, the flap Thickness sensitivity circuit 10, the magnitude extraction circuit 120 are all-wave or halfwave rectifier
Circuit.
Further, the flap Thickness sensitivity circuit 10, which is characterized in that the survey of analog-digital conversion circuit as described 141
Accuracy of measurement is 2~12 bits.
Further, the flap Thickness sensitivity circuit 10, which is characterized in that the confession of analog-digital conversion circuit as described 141
Piezoelectric voltage is 1.8~3.3 volts.
Further, the flap Thickness sensitivity circuit 10, which is characterized in that analog-digital conversion circuit as described 141 when
Clock sample frequency is 10K~10M hertz.
Further, the flap thickness detecting system 100, which is characterized in that the radio-frequency signal generator 210
Amplitude output signal is 10~20 volts.
Fig. 5 is that the different flap thickness of a specific application example in the flap Thickness sensitivity circuit of the embodiment of the present invention are corresponding
Signal waveform compares figure.When curve 1 is 10 millimeters of flap thickness induction coil 110 output signal VSENSE (5 volts of scale/
Lattice), the output signal VSENSE (2 volts/lattice of scale) of induction coil 110 when curve 2 is 3 millimeters of flap thickness.From curve 1 and song
Flap thickness is bigger when the comparison of line 2 can be seen that 10 millimeters, and the output of induction coil 110 is bigger.Curve 3 is flap thickness 10
The output signal of magnitude extraction circuit 120 when millimeter, the output letter of magnitude extraction circuit 120 when curve 4 is 3 millimeters of flap thickness
Number.From the point of view of the comparison of curve 3 and curve 4, magnitude extraction circuit 120 can convert stabilization for the output of induction coil 110
Direct current output, and with flap thickness increase and increase.Curve 5 is the Serial output of analog to digital conversion circuit, and the value of output is
0111, corresponding flap is with a thickness of 10mm.Curve 6 is the Serial output of analog to digital conversion circuit, and the value of output is 0011, corresponding
Flap is with a thickness of 3mm.From curve 5 and curve 6 as can be seen that the present invention can successfully detect flap thickness and Digital output.
Compared with the prior art scheme, which is fully located at the hair being easy in vitro with inductive coupling circuit to the present invention
Ray circle merges on same printed circuit board, low in energy consumption, is easily integrated, is advantageously implemented the miniaturization of extracorporeal circuit.The electricity
Road is reliable and stable, easily operated, realizes digitlization, can record flap information in real time, is also beneficial to other circuit extraction skins
Valve information.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention and not to limit it, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (8)
1. a kind of flap Thickness sensitivity circuit, which is characterized in that include at least: induction coil, magnitude extraction circuit, filter circuit
And digital measuring circuit, wherein
The output of the induction coil is connected with the input of the magnitude extraction circuit, and output is AC signal, signal width
Degree changes with the monotonic intensity sensed；
The magnitude extraction circuit, the maximum amplitude of the AC signal for retaining the induction coil received output, and should
Amplitude becomes DC level as output, and the output of induction coil is converted stable direct current output by magnitude extraction circuit, and
Increase as flap thickness increases；
The filter circuit is connected with magnitude extraction circuit, for filtering the high fdrequency component of the output of magnitude extraction circuit
Wave, the DC level of output smoothing；
The digital measuring circuit, including analog to digital conversion circuit, clock control circuit and register, wherein
Analog-digital conversion circuit as described is connected with filter circuit, and the DC level that filter circuit exports is become corresponding number and is believed
Number；
The clock control circuit is connected with analog to digital conversion circuit and register, provides for analog to digital conversion circuit using time and control
Switching signal processed, and clock signal is provided for register；
The register is connected with analog to digital conversion circuit, for saving the digital signal after measuring.
2. flap Thickness sensitivity circuit as described in claim 1, which is characterized in that the magnitude extraction circuit is all-wave or half
Wave rectification circuit.
3. flap Thickness sensitivity circuit as described in claim 1, which is characterized in that the measurement accuracy of analog-digital conversion circuit as described
For 2~18 bits.
4. flap Thickness sensitivity circuit as described in claim 1, which is characterized in that the supply voltage of analog-digital conversion circuit as described
It is 1.8~3.3 volts.
5. flap Thickness sensitivity circuit as described in claim 1, which is characterized in that the clock sampling of analog-digital conversion circuit as described
Frequency is 10K~10M hertz.
6. a kind of system using flap Thickness sensitivity circuit described in claim 1, which is characterized in that further include inductive coupling
Circuit, wherein
The inductive coupling circuit includes radio-frequency signal generator, transmitting resonance circuit and reception resonance circuit, wherein
The radio-frequency signal generator is connected with transmitting resonance circuit, humorous for the radiofrequency signal for needing to issue to be conveyed to transmitting
Shake circuit；
The transmitting resonance circuit, including connected transmitting coil and series resonant capacitance, wherein
Transmitting coil is used to give emission of radio frequency signals to reception resonance circuit；
Series resonant capacitance is used to form resonance circuit with transmitting coil, filters out other frequency noises；
The reception resonance circuit, including connected receiving coil and parallel resonance capacitor, wherein
Receiving coil is connected in the heart with transmitting coil, the signal issued for receiving transmitting resonance circuit；
Parallel resonance capacitor is used to form resonance circuit with receiving coil, filters out other frequency noises.
7. the system of flap Thickness sensitivity circuit as claimed in claim 6, which is characterized in that the induction coil and emission lines
Circle to the heart place, and and transmitting coil in same printed circuit board, induction coil inductance value be less than transmitting coil and reception
The 1/8 of the inductance value of coil.
8. the system of flap Thickness sensitivity circuit as claimed in claim 6, which is characterized in that the radio-frequency signal generator
Amplitude output signal is 10~20 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710037744.4A CN107049320B (en) | 2017-01-18 | 2017-01-18 | A kind of flap Thickness sensitivity circuit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710037744.4A CN107049320B (en) | 2017-01-18 | 2017-01-18 | A kind of flap Thickness sensitivity circuit and system |
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| Publication Number | Publication Date |
|---|---|
| CN107049320A CN107049320A (en) | 2017-08-18 |
| CN107049320B true CN107049320B (en) | 2019-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710037744.4A Active CN107049320B (en) | 2017-01-18 | 2017-01-18 | A kind of flap Thickness sensitivity circuit and system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110384860B (en) * | 2019-08-13 | 2024-06-07 | 浙江诺尔康神经电子科技股份有限公司 | Circuit for automatically adjusting output power of wireless coupling transmission circuit |
| CN113746216B (en) * | 2021-09-03 | 2023-09-22 | 福州优朋电子有限公司 | Mobile coil coupling induction detection device and detection method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004021876A1 (en) * | 2002-09-04 | 2004-03-18 | Cochlear Limited | Method and apparatus for measurement of transmitter/receiver separation |
| CN102743255A (en) * | 2012-06-08 | 2012-10-24 | 杭州诺尔康神经电子科技有限公司 | Optimal energy regulating system and method for electronic cochlea |
| CN103961106A (en) * | 2013-01-29 | 2014-08-06 | 杭州诺尔康神经电子科技有限公司 | Method for measuring thickness of skin flap and detecting receiving coil |
| CN105978110A (en) * | 2016-07-15 | 2016-09-28 | 上海力声特医学科技有限公司 | Wireless charging device and sacral nerve stimulation system thereof |
-
2017
- 2017-01-18 CN CN201710037744.4A patent/CN107049320B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004021876A1 (en) * | 2002-09-04 | 2004-03-18 | Cochlear Limited | Method and apparatus for measurement of transmitter/receiver separation |
| CN102743255A (en) * | 2012-06-08 | 2012-10-24 | 杭州诺尔康神经电子科技有限公司 | Optimal energy regulating system and method for electronic cochlea |
| CN103961106A (en) * | 2013-01-29 | 2014-08-06 | 杭州诺尔康神经电子科技有限公司 | Method for measuring thickness of skin flap and detecting receiving coil |
| CN105978110A (en) * | 2016-07-15 | 2016-09-28 | 上海力声特医学科技有限公司 | Wireless charging device and sacral nerve stimulation system thereof |
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| CN107049320A (en) | 2017-08-18 |
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