CN203494059U - Sensor collecting and processing system of implantable heart pacemaker - Google Patents
Sensor collecting and processing system of implantable heart pacemaker Download PDFInfo
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- CN203494059U CN203494059U CN201320588201.9U CN201320588201U CN203494059U CN 203494059 U CN203494059 U CN 203494059U CN 201320588201 U CN201320588201 U CN 201320588201U CN 203494059 U CN203494059 U CN 203494059U
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Abstract
The utility model discloses a sensor collecting and processing system of an implantable heart pacemaker, belonging to the medical instrument equipment technical field and comprising a filter circuit, an amplification circuit, an analog-to-digital converter, a signal frequency detection module and a sampling frequency generation module. The output terminal of a pacemaker acceleration sensor is in connection with the input terminal of the filter circuit; the output terminal of the filter circuit is in connection with the input terminal of the amplification circuit; the output terminal of the amplification circuit is in connection with the input terminal of the analog-to-digital converter; the analog-to-digital converter is in connection with the signal frequency detection module; the output terminal of the signal frequency detection module is divided into two branches, wherein one branch interacts with a pacemaker MCU, and the other branch is in connection with the sampling frequency generation module; the output terminal of the sampling frequency generation module is in connection with the analog-to-digital converter. According to the utility model, the sampling frequency of the analog-to-digital converter can automatically adjust with the signals outputted by the acceleration sensor, thereby reducing unnecessary power consumption through automatically adjusting sampling frequency.
Description
Technical field
This utility model belongs to medical apparatus and instruments technical field, is specifically related to a kind of sensor acquisition processing system of Implanted cardiac pacemaker.
Background technology
Along with the extensive use of cardiac pacemaker, single fixing pacing frequency can not meet the demand of extensive patients.Especially for the bad patient of Chronotropic action, due to reasons such as age, medicine or heart diseases, their heart rate can not be along with the raising of self metabolic rate and is risen, and this will cause organism metabolism demand to be met.If this class patient implants, be the fixing pacemaker of pacing frequency, limited cardiac output will affect the quality of their daily life.Therefore the cardiac pacemaker that possesses frequency adaptable pacing function arises at the historic moment, and becomes gradually the essential function of main flow pacemaker in market.
Current motion sensor mainly comprises minute ventilation sensor, QT sensor, acceleration transducer etc.
Minute ventilation sensor is the sensor based on breathing, and it weighs patient's quantity of motion by tidal volume and these two parameters of respiratory frequency.Wherein, tidal volume can obtain by the amplitude detection through thoracic impedance signal, and respiratory frequency can record by the frequency through thoracic impedance signal.Comprehensive above-mentioned two parameters can obtain patient's minute ventilation value, then can evaluate thus the patient's that minute ventilation adapts therewith cardiac pacemaker pacing frequency.
QT sensor is the sensor based on QT interval duration.When patient's tranquillization, QT interval duration is longer; When patient moving, QT interval duration is shorter.Therefore can regulate the pacing frequency of cardiac pacemaker according to the QT duration of interval, when QT interval is longer, pacing frequency is slower; QT interval,, pacing frequency was very fast more in short-term.
Acceleration transducer is the sensor based on accelerometer.Accelerometer can detect patient's acceleration of motion, and embodies with the form of analog voltage.Cardiac pacemaker, by detecting amplitude and the frequency of this voltage signal, can be assessed patient's kinestate this moment, and calculate suitable pacing frequency.
For acceleration transducer, the analog voltage of its output need to carry out analog digital conversion could be for the processing of Digital Logic.And in analog-digital conversion process, need to keep sufficiently high sample frequency, otherwise will lose Useful Information after being converted to digital signal.According to nyquist sampling theorem, when sample frequency is greater than while being sampled 2 times of highest frequency in signal, the digital signal after sampling has intactly retained the information in original analog signal.Therefore, the sample frequency of acceleration transducer, should remain on the more than 2 times of primary signal highest frequency.But when patient's tranquillization and motion, the frequency of primary signal has larger difference, during tranquillization, signal frequency is lower, and during motion, signal frequency is higher; And between different patients, their tranquillization and motor message frequency also have larger difference.Therefore, traditional pacemaker only can be set in sample frequency a higher level, could meet the sample frequency requirement under different patients, different motion state.
The particularity of cardiac pacemaker requires it must have longer service life.But above-mentioned higher sample frequency will consume larger power consumption.And during patient's tranquillization and quantity of motion primary signal frequency hour lower, if still also will produce unnecessary power consumption loss by higher sample frequency.This all will affect the service life of cardiac pacemaker.
United States Patent (USP) ACCELEROMETER-BASED RATE-ADAPTIVE CARDIAC PACING WITH SECOND GENERATION SIGNAL PROCESSING-WO9718010A1 discloses a kind of variable frequency cardiac pacemaker with acceleration transducer, and it sets the pacing frequency of pacemaker according to the proportionate relationship of positive negative acceleration.But the technical scheme of its description adopts fixing sample frequency to sample to acceleration transducer, therefore when signal frequency is lower, still keep higher sample frequency, thereby consumed unnecessary power consumption, shortened the service life of cardiac pacemaker.
United States Patent (USP) A heart pacemaker with a variable stimulation frequency-EP19960119346; EP0778049A2 discloses a kind of by frequency and the athletic posture of motion sensor senses patient step, and regulates the cardiac pacemaker of pacing frequency with this.But the technical scheme of its description is the signal of sensor output to be adopted simultaneously to filter amplification circuit and the sampling processing circuit of 2 different frequency bands, obtains patient's step frequency and athletic posture; Comprehensively analyze again these two kinds of signals and draw the pacing frequency that is applicable to patient.Therefore this method of simultaneously processing different frequency range signal, must adopt higher sample frequency, and when signal frequency is lower, cannot avoid consuming unnecessary power consumption.
Utility model content
In order to overcome above-mentioned defect of the prior art, the purpose of this utility model is to provide a kind of sensor acquisition processing system of Implanted cardiac pacemaker, this system can realize the sample frequency of analog-digital converter along with the function of the signal adaptive adjustment of acceleration transducer output, thereby can reduce unnecessary power consumption by automatic adjusting sample frequency.
This utility model is to be achieved through the following technical solutions:
A kind of sensor acquisition processing system of Implanted cardiac pacemaker, comprise filter circuit, amplifying circuit, analog-digital converter, signal frequency detection module and sample frequency generation module, the outfan of the acceleration transducer of pacemaker is connected to the input of filter circuit, the outfan of filter circuit is connected to the input of amplifying circuit, the outfan of amplifying circuit is connected to the input of analog-digital converter, analog-digital converter is connected with signal frequency detection module, the outfan of signal frequency detection module is divided into two-way, the microprocessing unit MCU of one tunnel and pacemaker is mutual, another road is connected with sample frequency generation module, the outfan of sample frequency generation module is connected to analog-digital converter.
Described signal frequency detection module comprises amplitude comparator, enumerator, intervalometer and latch, the outfan of analog-digital converter is connected to amplitude comparator, amplitude comparator is connected with enumerator, the outfan of enumerator and intervalometer is all connected to latch, and latch and pacemaker microprocessing unit MCU are mutual.
Described sample frequency generation module comprises voltage controlled oscillator and for controlling the DC voltage generator of voltage controlled oscillator, the outfan of described latch is connected to the input of DC voltage generator, the outfan of DC voltage generator is connected with the input of voltage controlled oscillator, and the outfan of voltage controlled oscillator is connected to analog-digital converter.
Described filter circuit consists of second-order bandpass filter, and its passband frequency range is 3～13 hertz.
Described amplifying circuit consists of operational amplifier, and amplification is 2 times.
Described analog-digital converter adopts 10 SAR structures.
Compared with prior art, the utlity model has following useful technique effect:
System of the present utility model is carried out filtering to the acceleration signal of acceleration transducer, after amplification, after analog-digital converter is converted to digital signal, input signal frequency detection module, signal is detected and record, outfan one tunnel and the pacemaker microprocessing unit MCU of signal frequency detection module are mutual, one road is connected to sample frequency generation module, the variable cyclic pulse signal of signal frequency output frequency that sample frequency generation module transmits according to sample frequency detection module, analog-digital converter is usingd the frequency of this cyclic pulse signal as sample frequency, the output signal of acceleration transducer is gathered and changed, thereby the function that the sample frequency that has realized analog-digital converter is adjusted along with the signal adaptive of acceleration transducer output.If the frequency of acceleration signal declines, described system reduces the sample frequency of analog-digital converter automatically, thereby reduces unnecessary power consumption; If signal frequency rises, described system improves the sample frequency of analog-digital converter automatically, thereby guarantees that sampled signal is undistorted.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is filter circuit figure of the present utility model;
Fig. 3 is amplification circuit diagram of the present utility model.
Wherein: 1 is acceleration transducer; 2 is filter circuit; 3 is amplifying circuit; 4 is analog-digital converter; 5 is signal frequency detection module; 6 is amplitude comparator; 7 is enumerator; 8 is the microprocessing unit MCU of pacemaker; 9 is latch; 10 is DC voltage generator; 11 is intervalometer; 12 is voltage controlled oscillator; 13 is sample frequency generation module.
The specific embodiment
Below in conjunction with accompanying drawing, this utility model is described in further detail:
Referring to Fig. 1～3, the sensing acquisition processing system of Implanted cardiac pacemaker of the present utility model, comprise and add filter circuit 2, amplifying circuit 3, analog-digital converter 4, signal frequency detection module 5 and sample frequency generation module 13, the outfan of the acceleration transducer 1 of pacemaker is connected to the input of filter circuit 2, filter circuit 2 consists of second-order bandpass filter, its passband frequency range is 3～13 hertz, in Fig. 2, VIN is filter circuit input, connect acceleration transducer outfan, VOUT is filter circuit outfan, connects input amplifier.The outfan of filter circuit 2 is connected to the input of amplifying circuit 3, amplifying circuit 3 consists of operational amplifier, and amplification is 2 times, in Fig. 3, VIN1, VIN2 are input amplifier, connect the outfan of filter circuit, VOUT is amplification circuit output end, connect the input of analog-digital converter, the function that this amplifying circuit is realized is, after the voltage difference VIN1-VIN2 of input is amplified to 2 times, to be output as VOUT signal.The outfan of amplifying circuit 3 is connected to the input of analog-digital converter 4, analog-digital converter 4 adopts 10 SAR structures, analog-digital converter 4 is connected with signal frequency detection module 5, the outfan of signal frequency detection module 5 is divided into two-way, one tunnel and pacemaker microprocessing unit MCU8 are mutual, another road is connected with sample frequency generation module 13, and sample frequency generation module 13 is connected to analog-digital converter 4.
Signal frequency detection module 5 comprises amplitude comparator 6, enumerator 7, intervalometer 11 and latch 9, the outfan of analog-digital converter 4 is connected to amplitude comparator 6, amplitude comparator 6 is connected with enumerator 7, the outfan of enumerator 7 and intervalometer 11 is all connected to latch 9, and latch 9 is mutual with pacemaker microprocessing unit MCU8.
Sample frequency generation module 13 comprises voltage controlled oscillator 12 and for controlling the DC voltage generator 10 of voltage controlled oscillator 12, the outfan of described latch 9 is connected to the input of DC voltage generator 10, the outfan of DC voltage generator 10 is connected with the input of voltage controlled oscillator 12, and the outfan of voltage controlled oscillator 12 is connected to analog-digital converter 4.
The sensing acquisition processing system of Implanted cardiac pacemaker of the present utility model, when work:
System is carried out after filtering, amplification the acceleration signal of acceleration transducer 1, through analog-digital converter 4, be converted to after digital signal, input signal frequency detection module 5, signal frequency detection module 5 consists of amplitude comparator 6, enumerator 7, intervalometer 11 and latch 9, the pre-set amplitude threshold of native system, amplitude comparator 6 compares digital signal range value and the amplitude threshold of analog-digital converter 4 outputs, if signal amplitude value surpasses amplitude threshold, amplitude comparator 6 output levels " height "; Otherwise, amplitude comparator 6 output levels " low ".7 " height " level that amplitude comparator 6 is exported of enumerator are counted.11 pairs of times of intervalometer are carried out timing, when timing time reaches after the target duration of native system setting, and intervalometer 11 output latch signals.At intervalometer 11, send after latch signal, the count value that latch 9 transmits enumerator 11 latchs, thereby realized, latchs the number of times that surpasses the signal of amplitude threshold in this section of duration, has realized the detection of signal frequency and record.The signal frequency that DC voltage generator 10 in sample frequency generation module 13 latchs according to latch 9, export the DC voltage of corresponding amplitude, under 12 DC voltage controls of exporting at DC voltage generator 10 of voltage controlled oscillator, the cyclic pulse signal of output corresponding frequencies, this periodic signal outputs to analog-digital converter 4, analog-digital converter 4 is usingd the frequency of this signal as sample frequency, acceleration transducer 1 output signal is gathered, conversion, thereby the function that the sample frequency that has realized analog-digital converter is carried out self adaptation adjustment along with the output signal of acceleration transducer 1.Pacemaker microprocessing unit MCU8 carries out evaluates calculation to the output signal of acceleration transducer 1, obtain the pacing frequency value of the cardiac pacemaker that mates with acceleration signal, and provide pacemaker impulse according to this frequency values, thereby meet patients with implanted pacemaker to kinemic demand under current exercise intensity.If the frequency of acceleration signal declines, described system reduces the pacing frequency of pacemaker automatically; If signal frequency rises, described system improves the pacing frequency of pacemaker automatically, thus meet patient under different motion intensity to kinemic demand.
Claims (6)
1. the sensor acquisition processing system of an Implanted cardiac pacemaker, it is characterized in that, comprise filter circuit (2), amplifying circuit (3), analog-digital converter (4), signal frequency detection module (5) and sample frequency generation module (13), the outfan of the acceleration transducer of pacemaker (1) is connected to the input of filter circuit (2), the outfan of filter circuit (2) is connected to the input of amplifying circuit (3), the outfan of amplifying circuit (3) is connected to the input of analog-digital converter (4), analog-digital converter (4) is connected with signal frequency detection module (5), the outfan of signal frequency detection module (5) is divided into two-way, the microprocessing unit MCU(8 of one tunnel and pacemaker) mutual, another road is connected with sample frequency generation module (13), the outfan of sample frequency generation module (13) is connected to analog-digital converter (4).
2. the sensor acquisition processing system of a kind of Implanted cardiac pacemaker according to claim 1, it is characterized in that, described signal frequency detection module (5) comprises amplitude comparator (6), enumerator (7), intervalometer (11) and latch (9), the outfan of analog-digital converter (4) is connected to amplitude comparator (6), amplitude comparator (6) is connected with enumerator (7), the outfan of enumerator (7) and intervalometer (11) is all connected to latch (9), latch (9) and pacemaker microprocessing unit MCU(8) mutual.
3. the sensor acquisition processing system of a kind of Implanted cardiac pacemaker according to claim 2, it is characterized in that, described sample frequency generation module (13) comprises voltage controlled oscillator (12) and for controlling the DC voltage generator (10) of voltage controlled oscillator (12), the outfan of described latch (9) is connected to the input of DC voltage generator (10), the outfan of DC voltage generator (10) is connected with the input of voltage controlled oscillator (12), and the outfan of voltage controlled oscillator (12) is connected to analog-digital converter (4).
4. the sensor acquisition processing system of a kind of Implanted cardiac pacemaker according to claim 1, is characterized in that, described filter circuit (2) consists of second-order bandpass filter, and its passband frequency range is 3～13 hertz.
5. the sensor acquisition processing system of a kind of Implanted cardiac pacemaker according to claim 1, is characterized in that, described amplifying circuit (3) consists of operational amplifier, and amplification is 2 times.
6. the sensor acquisition processing system of a kind of Implanted cardiac pacemaker according to claim 1, is characterized in that, described analog-digital converter (4) adopts 10 SAR structures.
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| CN201320588201.9U CN203494059U (en) | 2013-09-23 | 2013-09-23 | Sensor collecting and processing system of implantable heart pacemaker |
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| CN201320588201.9U CN203494059U (en) | 2013-09-23 | 2013-09-23 | Sensor collecting and processing system of implantable heart pacemaker |
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Cited By (6)
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| CN104474634A (en) * | 2014-12-12 | 2015-04-01 | 杭州爱司米医疗器械有限公司 | Gradual refining method for preventing electrotherapy signal from saturating |
| CN104599468A (en) * | 2014-12-18 | 2015-05-06 | 中国电子科技集团公司第五十研究所 | Multidevice information acquisition control method |
| CN105353695A (en) * | 2015-12-10 | 2016-02-24 | 成都理工大学 | Feedback event driven type analog signal frequency conversion acquisition circuit and acquisition method |
| WO2016124065A1 (en) * | 2015-02-06 | 2016-08-11 | 上海微创医疗器械（集团）有限公司 | Cardiac pacemaker system and control method thereof |
| CN106250819A (en) * | 2016-07-20 | 2016-12-21 | 上海交通大学 | Based on face's real-time monitor and detection facial symmetry and abnormal method |
| WO2017016273A1 (en) * | 2015-07-28 | 2017-02-02 | 无锡华润上华半导体有限公司 | Accelerator |
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- 2013-09-23 CN CN201320588201.9U patent/CN203494059U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104474634B (en) * | 2014-12-12 | 2017-12-12 | 杭州爱司米医疗器械有限公司 | A kind of progressively fine method for preventing electrotherapy signal saturation |
| CN104474634A (en) * | 2014-12-12 | 2015-04-01 | 杭州爱司米医疗器械有限公司 | Gradual refining method for preventing electrotherapy signal from saturating |
| CN104599468A (en) * | 2014-12-18 | 2015-05-06 | 中国电子科技集团公司第五十研究所 | Multidevice information acquisition control method |
| CN104599468B (en) * | 2014-12-18 | 2018-01-30 | 中国电子科技集团公司第五十研究所 | The information gathering control method of more equipment |
| WO2016124065A1 (en) * | 2015-02-06 | 2016-08-11 | 上海微创医疗器械（集团）有限公司 | Cardiac pacemaker system and control method thereof |
| US10716930B2 (en) | 2015-02-06 | 2020-07-21 | Shanghai Microport Medical (Group) Co., Ltd. | Cardiac pacemaker system and control method thereof |
| WO2017016273A1 (en) * | 2015-07-28 | 2017-02-02 | 无锡华润上华半导体有限公司 | Accelerator |
| CN106403920A (en) * | 2015-07-28 | 2017-02-15 | 无锡华润上华半导体有限公司 | Acceleration device |
| CN106403920B (en) * | 2015-07-28 | 2019-02-22 | 无锡华润上华科技有限公司 | Accelerometer |
| US10801839B2 (en) | 2015-07-28 | 2020-10-13 | Csmc Technologies Fab2 Co., Ltd. | Accelerator |
| CN105353695B (en) * | 2015-12-10 | 2017-09-05 | 成都理工大学 | A kind of feedback-type event-driven analog signal frequency conversion Acquisition Circuit and collection mining method |
| CN105353695A (en) * | 2015-12-10 | 2016-02-24 | 成都理工大学 | Feedback event driven type analog signal frequency conversion acquisition circuit and acquisition method |
| CN106250819A (en) * | 2016-07-20 | 2016-12-21 | 上海交通大学 | Based on face's real-time monitor and detection facial symmetry and abnormal method |
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Address after: 721006 Ying Da Road, Shaanxi, Baoji, No. 18 Patentee after: LEPU MEDICAL ELECTRONICS TECHNOLOGY CO.,LTD. Address before: 721006 Ying Da Road, Shaanxi, Baoji, No. 18 Patentee before: SHAANXI QINMING MEDICAL INSTRUMENTS CO.,LTD. |
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Granted publication date: 20140326 |