CN101536900B - Method and system for constructing modular medical instrument based on USB HUB - Google Patents
Method and system for constructing modular medical instrument based on USB HUB Download PDFInfo
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Abstract
The invention relates to a method and a system for constructing a modular medical instrument based on USB HUB. The method comprises the following steps: each functional circuit adopts modular design, independently adopts a microprocessor and has the functions of independent AD conversion and USB communication control; each functional module is connected with a USB HUB module which has an electrical safety isolation function through a USB bus; and the USB HUB module is connected with a central console (PC) or server hardware through the USB bus, and connected with a special software platform based on the PC to form a complete medical instrument system. The method can realize high reliability and easy maintenance of the medical instrument, and the flexible expandability of the functions of the medical instrument, change the mode that the functions of the medical instrument are set by manufactures and can not be modified by a user, lead the user to be capable of randomly combining (increase or decrease) the functional modules according to specific detection requirements, and realize the personalized physiological parameter detection function and the function expansion of the medical instrument by USB topological structure.
Description
Technical field
The medical system that the present invention relates to a kind of Medical Instruments construction method and make up according to this method, especially a kind of modular medical instrument construction method and system based on USB HUB belong to the century electronic instrument of medicine field.
Background technology
USB (universal serial bus) (USB) with at a low price, at a high speed, advantage such as autgmentability and high conformability design flexibly, become the most popular standard that communicates to connect at present.Except general PC end was used, general-purpose serial bus USB was applied in more and more wide field as a kind of data communication interface.At present, the USB interface data communication mode also progresses into field of medical.
Chinese patent 02289498.5, title: " based on the multichannel AD harvester of USB ", a kind of improvement to original AD data acquisition unit based on the ISA interface is disclosed, this harvester mainly comprises the usb circuit that is connected with PC, single machine unit circuit and A/D convertor circuit three parts and the device driver that can under Windows98 and Windows2000, move accordingly, three partial circuits of this harvester be installed in one can with data collecting card that the PC usb bus is connected on.Compare with existing multichannel AD harvester based on the ISA interface, it has adaptability easy to use, quick, very strong and is easy to characteristics such as realization.But still there is the external physiological signal testing circuit of needs in this utility model and does not adopt the shortcoming of electrical safety quarantine measures.Chinese patent application number is: 200510013384.1, name is called: " based on the multiple physio-parameter detection system of USB ", a kind of physio-parameter detection system that carries out transfer of data and Control on Communication based on usb bus is disclosed, signal and isolated from power technology have been adopted in this patent application, guaranteed the safety of using, can realize electrocardio, blood pressure, blood oxygen, breathing, the detection of body temperature signal; Its weak point is: the acquisition controlling of all physiological signals relies on single microprocessor, if microprocessor is out of order, the testing of all parameters can't normally be carried out, poor reliability, not easy care, and this system can't be realized the expansion of detected parameters and the physiological parameter measuring ability of realizing individuation according to concrete detection demand.
Existing Medical Instruments function is by factory settings, the user can't revise, can not carry out the Medical Instruments functions expanding according to real needs, the detection type instrument can only carry out the detection of the physiological parameter of fixed type, the diagnostics classes instrument can only carry out the diagnostic imaging of fixed type, and the treatment quasi-instrument can only carry out the treatment of fixed type, often faces the problem that many different instruments use simultaneously clinically, bring interference mutual between the instrument, improved the complexity of power management; And increased the expense of hospital's purchase armarium, increased patient's medical burden simultaneously.
The USB interface limited amount (being generally 4) of built-in USB Port expansion on the PC main frame, peripheral hardware such as keyboard, mouse all is tending towards adopting the mode of USB interface to design, the PC main frame is outside under the too much situation of connection function equipment, face the situation that USB interface lacks, so must utilize the mode of USB HUB to expand.
Summary of the invention
At the prior art above shortcomings, the object of the present invention is to provide a kind of modular medical instrument construction method based on USB HUB; A kind of medical system that makes up based on said method is provided simultaneously, and the present invention can realize the flexible expansion of Medical Instruments function, and then realizes that the physiological parameter of safety, individuation detects system's easy care, reliability height.
The object of the present invention is achieved like this: a kind of modular medical instrument construction method based on USB HUB, at first adopt modularized design to become independently functional module to each functional circuit of Medical Instruments, each functional module independently adopts a microprocessor, has independently AD conversion and usb communication control function; Then above-mentioned each functional module that is used to gather human body signal is connected with USB HUB module by usb bus with parallel way, USB HUB module realizes that the electrical safety between human body and the computer is isolated and the signal of input is transferred to the central control board server; At last by the central control board server above-mentioned signal is handled the physiological parameter index that obtains the experimenter, described index is exported by outut device, finishes the structure of Medical Instruments thus.
Described functional module is made up of basic physiological parameter signal acquisition module and other physiological parameter signals acquisition module, basic physiological parameter signal acquisition module is by the cardiechema signals acquisition module, the ecg signal acquiring module, non-invasive blood pressure signal acquisition module and blood oxygen signal acquisition module are formed, be used to gather basic physiological parameter hear sounds, electrocardio, non-invasive blood pressure and blood oxygen signal, other physiological parameter signals acquisition module comprises the eeg signal acquisition module, the electromyographic signal collection module, the carotid artery ripple signal acquisition module of fighting, breath signal acquisition module and body temperature signal acquisition module, but basic physiological parameter signal acquisition module and other physiological parameter signals acquisition module are according to detection demand combination in any.
Described USB HUB module can adopt the USB topological structure, realizes the function expansion, as expanding diagnosis HUB and treatment HUB.
A kind of medical system that makes up based on said method, it comprises modular multi-physiological-parameter signal acquisition circuit, the USBHUB module, power module, central control board server and outut device, described multi-physiological-parameter signal acquisition circuit comprises basic physiological parameter signal acquisition module, basic physiological parameter signal acquisition module is by the cardiechema signals acquisition module, the ecg signal acquiring module, non-invasive blood pressure signal acquisition module and blood oxygen signal acquisition module four functional modules are formed, be used to gather basic physiological parameter hear sounds, electrocardio, non-invasive blood pressure and blood oxygen, each functional module under the multi-physiological-parameter signal acquisition circuit is parallel with one another and have independently A/D conversion and a usb communication control function; The above-mentioned signal that the multi-physiological-parameter signal acquisition circuit collects is by usb bus input USB HUB module, electrical safety between USB HUB module realization human body and the computer is isolated and the signal of importing is transferred to the central control board server, by the central control board server thereby above-mentioned signal is handled the physiological parameter index that obtains the experimenter, described index is exported by outut device.
Described USB HUB module comprises DC-DC reduction voltage circuit, electrical safety buffer circuit, USB HUB controller, USB HUB power-supply controller of electric and usb bus interface; The DC-DC insulating power supply module that adopts the electrical safety buffer circuit realizes the electrical isolation of power supply, adopts rf modulations isolating device or photoelectric coupled device to realize the electrical isolation of signal; USB HUB controller is the USB HUB controller of seven mouthfuls or four-hole.
Further, described multi-physiological-parameter signal acquisition circuit also comprises other physiological parameter signals acquisition module, described other physiological parameter signals acquisition module is the fight combination in any of ripple signal acquisition module, breath signal acquisition module and body temperature signal acquisition module of eeg signal acquisition module, electromyographic signal collection module, carotid artery, and other physiological parameter signals acquisition module and basic physiological parameter signal acquisition module are parallel with one another and have independently A/D conversion and a usb communication control function.
Described USB HUB module adopts the USB topological structure, expands diagnosis HUB and treatment HUB; Diagnosis HUB connects ultrasound functions module, blood viscosity test function module and endoscope's functional module by USB interface; Treatment HUB connects defibrillator functionality module, high frequency electric knife functional module, apparatus for curing insomnia functional module, therapeutic instrument for rehabilitation functional module and infusion pump functional module by USB interface.
Power module is supplied with for whole system provides power supply.Wherein, for USB HUB module provides 15V, 1A dc source, for each functional module provides groundwork power supply ± 5V, ± 3.3V.
Compared to existing technology, the present invention has following beneficial effect:
1, because each functional circuit of Medical Instruments independently adopts a microprocessor, have independently AD conversion and usb communication control function, can independently be connected and realize independently signals collecting, AD conversion, transfer function with USB HUB interface, and can realize that the physiological parameter of individuation detects according to concrete clinical needs combination in any collocation.
2, can realize the high reliability and the ease for maintenance of Medical Instruments.This invention provides USB interface connection type single, wieldy standard for all functional modules, simplified the design of communication interface, simplify the task of user when judging corresponding which slot of which plug simultaneously, realized single data general-purpose interface; Be easy to safeguard that each peripheral functional modules is separate, any one functional circuit breaks down and can directly change module or safeguard more targetedly.
3, realize the flexible expansion of Medical Instruments function, change the Medical Instruments function by factory settings, the pattern that the user can't revise, the user can be according to concrete detection demand combination in any (increase or subtract) peripheral functional modules, realize the physiological parameter measuring ability of individuation and pass through the USB topological structure, realize the expansion of Medical Instruments function, can expand 127 the peripheral function equipment that are connected at most.
4, support inserting of each functional module promptly use and hot plug, can safety under the situation of shutdown system power supply not plug and disconnect each peripheral functional modules, computer system automatically detects the plug of each module, and load driver program dynamically.
5, have high security, USB HUB module adopts signal and isolated from power technology, realizes the electrical safety isolation features of 2500V, guarantees being perfectly safe of human body and instrument.
6, provide four kinds of different data transmission, adapt to the requirement of various difference in functionality module data transmission.
Description of drawings
Fig. 1-a kind of modular medical instrument system (not expanded function HUB) principle assumption diagram based on USB HUB;
Fig. 2-a kind of modular medical instrument system (not expanded function HUB) theory diagram based on USB HUB;
Fig. 3-seven mouthful of USB HUB module principle structure chart;
Fig. 4-a kind of the USB of modular medical instrument system topology diagram based on USB HUB;
Fig. 5-a kind of modular medical instrument system (band expanded function HUB) theory diagram based on USB HUB.
The specific embodiment
Introduce the present invention in detail below in conjunction with the drawings and specific embodiments.
A kind of modular medical instrument construction method based on USB HUB is implemented as follows: each functional circuit of Medical Instruments adopts modularized design; Each functional module is connected with the USB HUB module with electrical safety isolation features by usb bus; USB HUB module realizes being connected (including the special-purpose software platform based on the central control board server) with the central control board server by usb bus, forms complete Medical Instruments system;
Wherein, each functional circuit of Medical Instruments, microprocessor of independent employing, have independently AD conversion and usb communication control function, can independently be connected and realize independently signals collecting, AD conversion, transfer function with USB HUB interface, and can realize that the physiological parameter of individuation detects according to concrete clinical needs combination in any collocation.A/D conversion and usb communication control function, by the microprocessor of integrated ADC in inside and USB controller, perhaps adopting independently, the mode of A/D conversion chip, microcontroller, USB interface chip realizes.This method can also adopt the USB topological structure, realizes the expansion of Medical Instruments function by USB HUB module, such as expanding diagnosis HUB and treatment HUB.
The present invention is based on the embodiment one of the modular medical instrument system of USB HUB:
As shown in Figure 1, native system comprises modular multi-physiological-parameter signal acquisition circuit, USB HUB module, power module, central control board server (including the special-purpose software platform based on the central control board server) and outut device.Wherein, modular multi-physiological-parameter signal acquisition circuit comprises cardiechema signals acquisition module, ecg signal acquiring module, non-invasive blood pressure signal acquisition module, blood oxygen signal acquisition module, eeg signal acquisition module, electromyographic signal collection module, carotid artery fight ripple signal acquisition module, breath signal acquisition module and body temperature signal acquisition module.Cardiechema signals acquisition module, ecg signal acquiring module, non-invasive blood pressure signal acquisition module and four kinds of functional modules of blood oxygen signal acquisition module are formed basic physiological parameter signal acquisition module, be used for basic physiological parameter hear sounds, electrocardio, non-invasive blood pressure, the collection of blood oxygen signal, other five kinds of modules can be according to concrete detection demand, pass through USB HUB combination in any with basic physiological parameter signal acquisition module, can provide the physiological parameter signals of 32 species diversityization to detect combination altogether.
As shown in Figure 2, the cardiechema signals acquisition module is used for detection, amplification, AD conversion, output cardiechema signals; Comprise active heart sound transducer, hear sounds frequency-division section circuit, signal conditioning circuit, central processing circuit (comprising AD conversion and usb communication circuit), USB interface; Wherein, hear sounds frequency-division section circuit is specially: low-frequency channel (5-60Hz), intermediate-frequency circuit (60-120Hz), high-frequency circuit (120-1500Hz);
The ecg signal acquiring module is used for detection, amplification, AD conversion, output electrocardiosignal; Comprise the body surface ecg utmost point and cardiac diagnosis lead-line, prestage safety protective circuit, signal conditioning circuit, central processing circuit (comprising AD conversion and usb communication circuit), USB interface;
Non-invasive blood pressure signal acquisition module circuit is used for detection, amplification, AD conversion, output non-invasive blood pressure signal; Comprise blood pressure cuff, cuff pressure and pulse signal testing circuit, air pump air valve control circuit, level modulate circuit, central processing circuit (comprising AD conversion and usb communication circuit), USB interface;
Blood oxygen signal acquisition module is used for detection, amplification, AD conversion, output blood oxygen signal; Comprise blood oxygen transducer, signal conditioning circuit, central processing circuit (comprising AD conversion and usb communication circuit), USB interface;
The eeg signal acquisition module is used for detection, amplification, AD conversion, output EEG signals; Comprise brain ammeter face electrode, prestage safety protective circuit, signal conditioning circuit, central processing circuit (comprising AD conversion and usb communication circuit), USB interface;
The electromyographic signal collection module is used for detection, amplification, AD conversion, output electromyographic signal; Comprise surface electrode, prestage safety protective circuit, signal conditioning circuit, central processing circuit (comprising AD conversion and usb communication circuit), USB interface;
The carotid artery ripple signal acquisition module of fighting is used for detection, amplification, AD conversion, output neck arterial pulse ripple signal; Comprise carotid artery fight pick off, signal conditioning circuit, central processing circuit (comprising AD conversion and usb communication circuit), USB interface;
The breath signal acquisition module is used for detection, amplification, AD conversion, output breath signal; Comprise respiration pickup, signal conditioning circuit, central processing circuit (comprising AD conversion and usb communication circuit), USB interface;
The body temperature signal acquisition module is used for detection, amplification, AD conversion, output electrocardiosignal; Comprise temperature sensor, signal conditioning circuit, central processing circuit (comprising AD conversion and usb communication circuit), USB interface;
A/D conversion and usb communication control circuit in above-mentioned each acquisition module, can be by the microprocessor (as the C8051F32X/34X series of products of U.S. Silicon Laboratories company) of inner integrated ADC of monolithic and USB controller, perhaps adopting independently, the mode of A/D conversion chip, microcontroller, USB interface chip realizes (as MAX1246, the semi-conductive LPC932A1 in grace intelligence Pu, the DIUSBD12 of Maxim company); Other circuit adopts existing design commonly used to realize;
Wherein, USB HUB module comprises: DC-DC reduction voltage circuit, electrical safety buffer circuit, USB HUB controller, USB HUB power-supply controller of electric, usb bus interface; The electrical safety buffer circuit has the electrical safety isolation features of 2500V, adopt DC-DC insulating power supply module to realize the electrical isolation (as the G0505D-2W of Jin Shengyang company) of power supply, adopt rf modulations isolating device (as the SI844X series digit isolating device of U.S. Silicon Laboratories), perhaps photoelectric coupled device (as TLP521-2GB) is realized the electrical isolation of signal; USB HUB controller adopts the TUSB2077A of American TI Company and TUSB2046B to realize; USB HUB power-supply controller of electric adopts the TPS207X series of American TI Company to realize; Other circuit adopts existing design commonly used to realize; Figure 3 shows that a kind of seven mouthfuls of USB HUB modular structures;
Wherein, power module can adopt following dual mode to realize:
1, power supply adaptor is directly powered, comprise 220V AC adapter (output 15V, the 1A dc source), the DC-DC reduction voltage circuit (output+3.3V and+dc source of 5.0V, blood pressure lowering chip such as the LM2575 of adopting), voltage reversal circuit (obtaining-3.3V-5.0V power supply, the reversed charge pump that is adopted such as the MAX889 of Maxim company), DC-DC insulating power supply module;
2, power supply adaptor and Li battery powered, modular multi-physiological-parameter signal acquisition circuit directly obtains power supply from usb bus, comprise 220V AC adapter (output 15V, the 1A dc source), (directly adopt PC USB port power supply is the Li battery powered to the Li battery charger, charger adopts the Max1811 of Maxim company), DC-DC booster circuit and DC-DC reduction voltage circuit (obtain+3.3V and+5.0V, the for example Max1797 of Maxim company and Max1837), voltage reversal circuit (the reversed charge pump that is adopted such as the MAX889 of Maxim company);
Special-purpose software platform based on the central control board server: comprise computer operating system, driver, signal analysis and processing algorithm, user interface, data base; Its characteristic information by storing in USB driver, each USB HUB and each module is realized the identification to each module, and foundation communicates to connect with hardware system, finishes record, pretreatment, data analysis, demonstration to each physiological signal, data storage.
Wherein, signal record, pretreatment, demonstration are realized by graphic programming system design platform Labview8.20 programming, each physiological parameter signals software records, pretreatment, pictorial display or data show software adopt modularized design, relatively independent between each software module, can realize the load or unload of software module according to modular signal acquisition circuit; The data base stores and adopts MySQL Server 5.0.67 data base, is realized by graphic programming system design platform Labview8.20 programming; The data analysis Processing Algorithm adopts the Matlab7.0 programming, and by the seamless embedded software system of labview MathScript node, the data of record is handled, and extracts the characteristic point of waveform correlation, and calculates index of correlation.
Outut device is as the printout of printer realization examining report, audio amplifier output audio signal.
A kind of modular medical instrument system embodiment two of the present invention based on USB HUB:
As shown in Figure 4, adopt the USB topological structure, realize the expansion of Medical Instruments function, expand diagnosis HUB and treatment HUB by USB HUB module.The concrete expansion as can be seen from Figure 4: USB HUB module 1 has seven USB interface, wherein four USB interface connect basic physiological parameter signal acquisition module and (also can connect basic physiological parameter signal acquisition module and other physiological parameter signals acquisition module, four modules arbitrarily in nine modules altogether), three USB interface meet USB HUB module 2, diagnosis HUB and the treatment HUB of expansion respectively in addition.Other five physiological parameter signals acquisition modules connect the USB HUB module 2 of expansion by USB interface.
As shown in Figure 5, a kind of modular medical instrument system based on USB HUB with expanded function, modular multi-physiological-parameter signal acquisition circuit and embodiment one are identical, and diagnosis HUB is connected with USB HUB module with treatment HUB; Wherein, diagnosis HUB connects ultrasound functions module, blood viscosity test function module and endoscope's functional module by USB interface; Treatment HUB connects defibrillator functionality module, high frequency electric knife functional module, apparatus for curing insomnia functional module, therapeutic instrument for rehabilitation functional module and infusion pump functional module by USB interface.
Wherein, diagnosis HUB and treatment HUB adopt the mode of uninterrupted power source USP, DC-DC reduction voltage circuit, DC-DC booster circuit, magnetic isolating device, DC-DC insulating power supply module to provide power supply to supply with according to the power supply requirement of concrete module.
The invention is not restricted to the embodiment that this description exemplifies.Those of ordinary skills adopt technique known, make not breaking away from various variation of the present invention or retrofiting all belonging to the scope of protection of the invention.
Claims (4)
1. modular medical instrument construction method based on USB HUB, it is characterized in that: at first, adopt modularized design to become independently functional module to each functional circuit of Medical Instruments, each functional module independently adopts a microprocessor, has independently A/D conversion and usb communication control function;
Then, each functional module is connected with USB HUB module by usb bus with parallel way, the electrical safety between USB HUB module realization human body and the computer is isolated and the signal of importing is transferred to the central control board server;
At last, by the central control board server above-mentioned signal is handled the physiological parameter index that obtains the experimenter, described physiological parameter index is exported by outut device, finishes the structure of Medical Instruments thus;
Described USB HUB module adopts the USB topological structure, realizes the function expansion, expands diagnosis HUB and treatment HUB;
Described USB HUB module comprises DC-DC reduction voltage circuit, electrical safety buffer circuit, USB HUB controller, USB HUB power-supply controller of electric and usb bus interface; The DC-DC insulating power supply module that adopts the electrical safety buffer circuit realizes the electrical isolation of power supply, adopts rf modulations isolating device or photoelectric coupled device to realize the electrical isolation of signal; USB HUB controller is the USB HUB controller of seven mouthfuls or four-hole.
2. the modular medical instrument construction method based on USB HUB according to claim 1 is characterized in that: described functional module is made up of basic physiological parameter signal acquisition module and other physiological parameter signals acquisition module; Described basic physiological parameter signal acquisition module is made up of cardiechema signals acquisition module, ecg signal acquiring module, non-invasive blood pressure signal acquisition module and blood oxygen signal acquisition module, is used to gather basic physiological parameter hear sounds, electrocardio, non-invasive blood pressure and blood oxygen signal; Described other physiological parameter signals acquisition module is made of fight ripple signal acquisition module, breath signal acquisition module and body temperature signal acquisition module of eeg signal acquisition module, electromyographic signal collection module, carotid artery, but each functional module under each functional module under the described basic physiological parameter signal acquisition module and described other physiological parameter signals acquisition module is according to detection demand combination in any.
3. one kind based on the method for claim 1 and the medical system that makes up, it is characterized in that: it comprises modular multi-physiological-parameter signal acquisition circuit, USB HUB module, central control board server and outut device, described multi-physiological-parameter signal acquisition circuit comprises basic physiological parameter signal acquisition module, basic physiological parameter signal acquisition module is by the cardiechema signals acquisition module, the ecg signal acquiring module, non-invasive blood pressure signal acquisition module and blood oxygen signal acquisition module four functional modules are formed, be used to gather basic physiological parameter hear sounds, electrocardio, non-invasive blood pressure and blood oxygen, each functional module under the multi-physiological-parameter signal acquisition circuit is parallel with one another and have independently A/D conversion and a usb communication control function;
The above-mentioned signal that the multi-physiological-parameter signal acquisition circuit collects is by usb bus input USB HUB module, electrical safety between USBHUB module realization human body and the computer is isolated and the signal of importing is transferred to the central control board server, by the central control board server thereby above-mentioned signal is handled the physiological parameter index that obtains the experimenter, described physiological parameter index is exported by outut device;
Described USB HUB module adopts the USB topological structure, expands diagnosis HUB and treatment HUB; Diagnosis HUB connects ultrasound functions module, blood viscosity test function module and endoscope's functional module by USB interface; Treatment HUB connects defibrillator functionality module, high frequency electric knife functional module, apparatus for curing insomnia functional module, therapeutic instrument for rehabilitation functional module and infusion pump functional module by USB interface;
Described USB HUB module comprises electrical safety buffer circuit, USB HUB controller, USB HUB power-supply controller of electric and usb bus interface; The DC-DC insulating power supply module that adopts the electrical safety buffer circuit realizes the electrical isolation of power supply, adopts rf modulations isolating device or photoelectric coupled device to realize the electrical isolation of signal; USB HUB controller is the USB HUB controller of seven mouthfuls or four-hole.
4. medical system according to claim 3, it is characterized in that: described multi-physiological-parameter signal acquisition circuit also comprises other physiological parameter signals acquisition module, described other physiological parameter signals acquisition module is the eeg signal acquisition module, the electromyographic signal collection module, the carotid artery ripple signal acquisition module of fighting, the combination in any of breath signal acquisition module and body temperature signal acquisition module, parallel with one another and each functional module of each functional module under each functional module under described other physiological parameter signals acquisition module and the described basic physiological parameter signal acquisition module have independently A/D conversion and usb communication control function;
Wherein, A/D conversion and usb communication control function, by the microprocessor of integrated A/D converter in inside and USB controller, perhaps adopting independently, the mode of A/D conversion chip, microcontroller, USB interface chip realizes.
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