CN107124234B - Wireless transmission coil drop monitoring circuit and system - Google Patents
Wireless transmission coil drop monitoring circuit and system Download PDFInfo
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- CN107124234B CN107124234B CN201710405560.9A CN201710405560A CN107124234B CN 107124234 B CN107124234 B CN 107124234B CN 201710405560 A CN201710405560 A CN 201710405560A CN 107124234 B CN107124234 B CN 107124234B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 54
- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000000605 extraction Methods 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 32
- 239000010753 BS 2869 Class E Substances 0.000 claims description 14
- 238000004804 winding Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 abstract description 7
- 238000010168 coupling process Methods 0.000 abstract description 7
- 238000005859 coupling reaction Methods 0.000 abstract description 7
- 230000001939 inductive effect Effects 0.000 abstract description 7
- 230000010354 integration Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 239000007943 implant Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000000638 stimulation Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 101100489713 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND1 gene Proteins 0.000 description 1
- 210000000133 brain stem Anatomy 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
- H04B17/0085—Monitoring; Testing using service channels; using auxiliary channels using test signal generators
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- H04B5/48—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a wireless transmission coil falling monitoring circuit and a system, wherein the wireless transmission coil falling monitoring circuit comprises a pulse extraction circuit, a peak value detection circuit, a digital measurement circuit and a digital comparison circuit, wherein the peak value detection circuit is used for detecting and retaining peak value information of an output signal of the pulse extraction circuit; the analog-to-digital conversion circuit is used for converting direct current analog output of the measurement peak value detection circuit into a digital signal; the digital comparison circuit is used for comparing the output of the digital measurement circuit with a value which is reserved in the register when the analog-to-digital conversion circuit is opened last time, and judging whether the wireless transmission coil falls off or not. The invention can monitor whether the transmission coil of the implanted medical equipment which transmits signal energy by adopting an inductive coupling mode falls off in real time under the condition of not influencing the normal work of the inductive coupling circuit, and has the advantages of high response speed of the whole circuit, no influence on the normal work of the inductive coupling circuit, easy integration and the like.
Description
Technical Field
The invention belongs to the field of implantable medical devices, and particularly relates to a wireless transmission coil falling-off monitoring circuit and system.
Background
In the implantable medical device, the inductive coupling technology is widely used, especially for products such as cochlear prosthesis, artificial vision and auditory brainstem stimulator, because the external and internal devices are only separated by the distance of the thickness of the flap, the inductive coupling technology can effectively transmit energy and signals into the implant, so that the implanted part does not need energy supply devices such as a battery, the use comfort of the patient is improved, and the use time of the implanted device is prolonged.
Because the energy required by the implant is completely transmitted by the wireless transmission coil, the implant can not work any more if the wireless transmission coil falls off. For infant patients or patients who cannot express accurately, once the wireless transmission coil falls off or the centering deviation between the wireless transmission coil and the receiving coil is serious, the equipment of the infant patients or the patients possibly cannot work normally for a long time, and the use or rehabilitation effect of the infant patients or the patients is very influenced. At present, the products mainly adopt a mode of carrying out reverse interactive handshake with an implant at regular time, and ensure that the wireless transmission coil and the implant work normally. However, the implant has a low reverse data transmission rate, and the input of the forward stimulation signal is interrupted during the reverse data transmission, which affects the use effect of the patient.
Disclosure of Invention
In view of the above, the present invention provides a wireless transmission coil falling monitoring circuit and system, which can automatically monitor whether a wireless transmission coil falls off or not at regular time without affecting the normal operation of a stimulation circuit, and the whole circuit has the advantages of fast response speed, easy integration, etc.
In order to achieve the above object, the present invention provides a wireless transmission coil drop monitoring circuit, which at least comprises: a pulse extraction circuit, a peak detection circuit, an analog-to-digital conversion circuit, and a digital comparison circuit, wherein,
the output of the pulse extraction circuit is connected with the input of the peak detection circuit, and the signal amplitude of the pulse extraction circuit is in direct proportion to the amplitude of a pulse large signal;
the peak value detection circuit is used for reserving the peak value of the received pulse small signal and converting the peak value into a direct current level to be output;
the analog-to-digital conversion circuit is connected with the peak value detection circuit and is used for converting the analog input of the peak value detection circuit into a digital signal to be output;
the digital comparison circuit comprises a digital logic circuit, a clock control circuit, a counter and a register, wherein,
the digital logic circuit is connected with the analog-to-digital conversion circuit and the register, compares a digital signal input from the analog-to-digital conversion circuit with a digital signal stored in the register, and outputs a high level when the difference value of the two signals exceeds a threshold value, otherwise, outputs a low level;
the clock control circuit provides clock signals for the digital logic circuit, the counter, the register and the analog-to-digital conversion circuit;
the counter is connected with the analog-to-digital conversion circuit and controls the analog-to-digital conversion circuit to be opened at equal time intervals;
the register is connected with the analog-to-digital conversion circuit and used for storing the measured digital signals.
Preferably, the pulse extraction circuit is a resistance voltage division circuit.
Preferably, the power supply voltage of the peak detection circuit is 1.2-5 volts.
Preferably, the measurement precision of the analog-to-digital conversion circuit is 2-8 bits.
Preferably, the turn-on period of the analog-to-digital conversion circuit is 1 millisecond to 1 second.
Preferably, the clock period of the digital comparison circuit is 100 nanoseconds to 100 microseconds.
In order to achieve the above object, the present invention further provides a wireless coil drop monitoring circuit system, further comprising a radio frequency transmitting/receiving module, a bluetooth module and a user display interface module, wherein,
the radio frequency transmitting and receiving module comprises a radio frequency signal source, a class-E amplifier and a receiving coil, wherein,
the radio frequency signal source is connected with the class-E amplifier and used for transmitting a radio frequency signal to be transmitted to the class-E amplifier;
the class-E amplifier comprises a wireless transmission coil, a resonance capacitor, a grounding capacitor, a power triode and a winding inductor, wherein,
the wireless transmission coil is connected with the resonance capacitor and used for transmitting the radio frequency signal to the receiving coil;
one end of the resonant capacitor is connected with the wireless transmission coil to form a resonant circuit, and the other end of the resonant capacitor is connected with a collector electrode of the power triode;
one end of the grounding capacitor is grounded, and the other end of the grounding capacitor is connected with a collector of the power triode and the pulse extraction circuit and is an input signal of the wireless transmission coil falling monitoring circuit;
one end of the winding inductor is connected with the collector of the power triode, and the other end of the winding inductor is connected with the power supply voltage;
the receiving coil is connected with the wireless transmission coil in a centering way and is used for receiving signals sent by the class-E amplifier;
the Bluetooth module comprises a Bluetooth transmitting circuit and a Bluetooth receiving circuit, wherein,
the Bluetooth transmitting circuit is connected with the digital logic circuit in a wired mode and transmits the output of the digital logic circuit through wireless Bluetooth;
the Bluetooth receiving circuit is connected with the Bluetooth transmitting circuit through wireless Bluetooth and is used for receiving signals transmitted by the Bluetooth transmitting circuit;
the user display interface module is connected with the Bluetooth receiving circuit and converts the output signal of the Bluetooth receiving circuit into an interface display which can be identified and received by a user.
Preferably, the signal amplitude of the non-grounding end of the grounding capacitor is 10-30V.
The invention has the beneficial effects that: all elements of the circuit can be integrated in a chip, normal work of the forward stimulation circuit is not influenced, influence on the inductive coupling circuit is negligible, power consumption is low, and digitization comparison performance is reliable. When the wireless transmission coil is detected to be fallen off or the connection state is unstable, the information can be reflected to the user or the user guardian very quickly, and the use effect of the user is ensured.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
fig. 1 is a block diagram illustrating an embodiment of a wireless transmission coil dropout monitoring circuit according to the present invention;
fig. 2 is a specific block diagram of an embodiment of a wireless transmission coil falling-off monitoring system according to the present invention;
FIG. 3 is a schematic circuit diagram of an exemplary application of the wireless transmission coil dropout monitoring system according to the embodiment of the present invention;
fig. 4 is a comparison diagram of signal waveforms of the grounded capacitor non-grounded terminal under the non-falling and falling conditions of the wireless transmission coil of a specific application example in the wireless transmission coil falling monitoring circuit according to the embodiment of the invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1-3, there are shown a block diagram, a system specific block diagram and a circuit schematic diagram of a wireless transmission coil dropout monitoring circuit 10 according to an embodiment of the present invention, wherein,
wireless transmission coil monitoring circuit 10 that drops includes at least: a pulse extraction circuit 110, a peak detection circuit 120, an analog-to-digital conversion circuit 130, and a digital comparison circuit 140, wherein,
the pulse extraction circuit 110 is composed of a voltage division circuit composed of a second resistor R2 and a third resistor R3, one end of the voltage division circuit is connected with the non-grounding end of the grounding capacitor 223, the other end of the voltage division circuit is connected with the input of the peak detection circuit 120, the pulse extraction circuit has the function that a small pulse signal extracted from a large pulse signal on the grounding capacitor 223 in the class-E amplifier is in direct proportion to the amplitude of the large pulse signal;
the peak detection circuit 120, which is composed of rail-to-rail amplifiers a1 and a2, a first diode D1 and a second capacitor C2, is configured to reserve the peak value of the received pulse small signal and convert the peak value into a dc level for output;
the analog-to-digital conversion circuit 130 is connected to the peak detection circuit 120, and is configured to convert an analog input of the peak detection circuit 120 into a digital signal for output;
the digital comparison circuit 140 includes a digital logic circuit 141, a clock control circuit 142, a counter 143, and a register 144, wherein,
the digital logic circuit 141 is connected with the analog-to-digital conversion circuit 130 and the register 144, compares the digital signal input from the analog-to-digital conversion circuit 130 with the digital signal stored in the register 144, and outputs a high level when the difference value of the two signals exceeds a threshold value, otherwise, outputs a low level;
the clock control circuit 142 provides clock signals for the digital logic circuit 141, the counter 143, the register 144 and the analog-to-digital conversion circuit 130;
the counter 143 is connected with the analog-to-digital conversion circuit 130, and controls the analog-to-digital conversion circuit 130 to be opened at equal time intervals;
the register 144 is connected to the analog-to-digital conversion circuit 130 for storing the measured digital signal.
In view of the above, referring to fig. 3, there is shown a schematic circuit diagram of a wireless transmission coil falling monitoring system 100, which includes a wireless transmission coil falling monitoring circuit 10, a radio frequency transceiver module 20, a bluetooth module 30 and a user display interface module 40, wherein,
the radio frequency transmitting and receiving module 20 comprises a radio frequency signal source 210, a class E amplifier 220 and a receiving coil 230, wherein,
the radio frequency signal source 210 is connected to the class-E amplifier 220, and is configured to transmit a radio frequency signal to be transmitted to the class-E amplifier 220;
the class E amplifier 220 includes a wireless transmission coil 221, a resonant capacitor 222, a ground capacitor 223, a power transistor 224, and a winding inductor 225, wherein,
the wireless transmission coil 221 is connected with the resonance capacitor 222, and is used for transmitting the radio frequency signal to the receiving coil 230;
one end of the resonant capacitor 222 is connected with the wireless transmission coil 221 to form a resonant circuit, and the other end is connected with the collector of the power transistor 224;
one end of the grounding capacitor 223 is connected with the GND1, the other end is connected with the collector of the power triode 224 and the pulse extraction circuit 110, and the grounding capacitor is an input signal of the wireless transmission coil falling monitoring circuit 10;
one end of the winding inductor 225 is connected with the collector of the power triode 224, and the other end is connected with VDD;
the receiving coil 230 is connected with the wireless transmission coil 221 in a centering manner and is used for receiving a signal sent by the class-E amplifier 220;
the bluetooth module 30 includes a bluetooth transmission circuit 310 and a bluetooth reception circuit 320, wherein,
the bluetooth transmitting circuit 310 is connected with the digital logic circuit 141 by wire, and transmits the output of the digital logic circuit 141 by wireless bluetooth;
the bluetooth receiving circuit 320 is connected with the bluetooth transmitting circuit 310 through wireless bluetooth and is used for receiving signals transmitted by the bluetooth transmitting circuit 310;
the user display interface module 40 is connected to the bluetooth receiving circuit 320, and converts the output signal of the bluetooth receiving circuit 320 into an interface display that can be recognized and received by the user.
Further, the wireless coil drop monitoring circuit 10 is characterized in that the pulse extraction circuit 110 is a resistance voltage divider circuit.
Further, the wireless coil drop monitoring circuit 10 is characterized in that the power supply voltage of the peak detection circuit 120 is 1.2 to 5 volts.
Further, the wireless coil drop monitoring circuit 10 is characterized in that the measurement accuracy of the analog-to-digital conversion circuit 130 is 2 to 8 bits.
Further, the wireless coil drop monitoring circuit 10 is characterized in that the on period of the analog-to-digital conversion circuit 130 is 1 millisecond to 1 second.
Further, the wireless coil drop monitoring circuit 10 is characterized in that the clock cycle of the digital comparison circuit 140 is 100 nanoseconds to 100 microseconds.
Further, the wireless coil drop monitoring system 100 is characterized in that the non-grounded end signal amplitude of the grounded capacitor 223 is 10-30 v.
Fig. 4 is a comparison diagram of signal waveforms of the grounded capacitor non-grounded terminal under the non-falling and falling conditions of the wireless transmission coil of a specific application example in the wireless transmission coil falling monitoring circuit according to the embodiment of the invention. Curve 1 is the signal (5 v/grid scale) of the non-grounded end of the grounded capacitor 223 when the wireless transmission coil is not dropped and normally connected, and curve 2 is the signal (5 v/grid scale) of the non-grounded end of the grounded capacitor 223 when the wireless transmission coil is not dropped and normally connected. As can be seen from a comparison between the curve 1 and the curve 2, the peak value of the signal of the non-grounded terminal of the grounded capacitor 223 of the wireless transmission coil is increased from 10.9375 volts when the signal is not dropped to 16.0625 volts when the signal is dropped, and the peak value is changed very significantly.
Compared with the prior art, all elements of the circuit can be integrated in the chip, the normal work of the forward stimulation circuit is not influenced, the influence on the inductive coupling circuit is negligible, the power consumption is low, and the digitization comparison performance is reliable. When the wireless transmission coil is detected to be fallen off or the connection state is unstable, the information can be reflected to the user or the user guardian very quickly, and the use effect of the user is ensured. .
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (7)
1. A wireless transmission coil drop monitoring circuit is characterized by at least comprising: a pulse extraction circuit, a peak detection circuit, an analog-to-digital conversion circuit, and a digital comparison circuit, wherein,
the output of the pulse extraction circuit is connected with the input of the peak detection circuit, and the signal amplitude of the pulse extraction circuit is in direct proportion to the amplitude of a pulse large signal;
the peak value detection circuit is used for reserving the peak value of the received pulse small signal and converting the peak value into a direct current level to be output;
the analog-to-digital conversion circuit is connected with the peak value detection circuit and is used for converting the analog input of the peak value detection circuit into a digital signal to be output;
the digital comparison circuit comprises a digital logic circuit, a clock control circuit, a counter and a register, wherein,
the digital logic circuit is connected with the analog-to-digital conversion circuit and the register, compares a digital signal input from the analog-to-digital conversion circuit with a digital signal stored in the register, and outputs a high level when the difference value of the two signals exceeds a threshold value, otherwise, outputs a low level;
the clock control circuit provides clock signals for the digital logic circuit, the counter, the register and the analog-to-digital conversion circuit;
the counter is connected with the analog-to-digital conversion circuit and controls the analog-to-digital conversion circuit to be opened at equal time intervals;
the register is connected with the analog-to-digital conversion circuit and used for storing the measured digital signals;
the pulse extraction circuit is a resistance voltage division circuit.
2. The circuit for monitoring coil dropout of claim 1, wherein a supply voltage of the peak detection circuit is 1.2 to 5 volts.
3. The wireless transmission coil drop-off monitoring circuit according to claim 1, wherein the measurement accuracy of the analog-to-digital conversion circuit is 2-8 bits.
4. The wireless transmission coil dropout monitoring circuit of claim 1 wherein said analog to digital conversion circuit has an on period of 1 millisecond to 1 second.
5. The wireless transmission coil dropout monitoring circuit of claim 1, wherein a clock period of the digital comparison circuit is between 100 nanoseconds and 100 microseconds.
6. A system using the wireless transmission coil drop-off monitoring circuit of claim 1, further comprising a radio frequency transceiver module, a Bluetooth module, and a user display interface module, wherein,
the radio frequency transmitting and receiving module comprises a radio frequency signal source, a class-E amplifier and a receiving coil, wherein,
the radio frequency signal source is connected with the class-E amplifier and used for transmitting a radio frequency signal to be transmitted to the class-E amplifier;
the class-E amplifier comprises a wireless transmission coil, a resonance capacitor, a grounding capacitor, a power triode and a winding inductor, wherein,
the wireless transmission coil is connected with the resonance capacitor and used for transmitting the radio frequency signal to the receiving coil;
one end of the resonant capacitor is connected with the wireless transmission coil to form a resonant circuit, and the other end of the resonant capacitor is connected with a collector electrode of the power triode;
one end of the grounding capacitor is grounded, the other end of the grounding capacitor is connected with a collector electrode of the power triode and the pulse extraction circuit, and an input signal of the wireless transmission coil falling monitoring circuit is obtained from a connection point of the grounding capacitor and the power triode;
one end of the winding inductor is connected with the collector of the power triode, and the other end of the winding inductor is connected with the power supply voltage;
the receiving coil is connected with the wireless transmission coil in a centering way and is used for receiving signals sent by the class-E amplifier;
the Bluetooth module comprises a Bluetooth transmitting circuit and a Bluetooth receiving circuit, wherein,
the Bluetooth transmitting circuit is connected with the digital logic circuit in a wired mode and transmits the output of the digital logic circuit through wireless Bluetooth;
the Bluetooth receiving circuit is connected with the Bluetooth transmitting circuit through wireless Bluetooth and is used for receiving signals transmitted by the Bluetooth transmitting circuit;
the user display interface module is connected with the Bluetooth receiving circuit and converts the output signal of the Bluetooth receiving circuit into an interface display which can be identified and received by a user.
7. The system of claim 6, wherein the non-ground terminal signal amplitude of the ground capacitor is 10-30 volts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710405560.9A CN107124234B (en) | 2017-06-01 | 2017-06-01 | Wireless transmission coil drop monitoring circuit and system |
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| CN201710405560.9A CN107124234B (en) | 2017-06-01 | 2017-06-01 | Wireless transmission coil drop monitoring circuit and system |
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| CN107124234B true CN107124234B (en) | 2020-07-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2862215Y (en) * | 2005-05-18 | 2007-01-24 | 北京浩华星电气设备技术开发有限公司 | Wireless fault indicating device |
| US20090048672A1 (en) * | 2007-06-19 | 2009-02-19 | Juventas, Inc. | Bone support devices and methods |
| CN202505594U (en) * | 2012-03-26 | 2012-10-31 | 上海力声特医学科技有限公司 | Wireless chargeable artificial cochlea |
| JP5915904B2 (en) * | 2012-06-22 | 2016-05-11 | ソニー株式会社 | Processing apparatus, processing method, and program |
| US9419470B2 (en) * | 2013-09-23 | 2016-08-16 | Qualcomm Incorporated | Low power detection of wireless power devices |
| CN104224406B (en) * | 2014-10-08 | 2016-01-13 | 浙江诺尔康神经电子科技股份有限公司 | Cochlear implant reverse signal radio frequency transmission receiving chip and system |
| CN106443291A (en) * | 2015-08-04 | 2017-02-22 | 浙江诺尔康神经电子科技股份有限公司 | Electric leakage detecting device and electric leakage detecting method for artificial cochlear implantation prosthesis |
| CN105896692B (en) * | 2016-04-07 | 2018-05-29 | 吉林大学 | A kind of implantable medical device charging system based on wireless energy transmission technology |
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