CN202589511U - Physiological weak current signal acquisition processing system and apparatus - Google Patents
Physiological weak current signal acquisition processing system and apparatus Download PDFInfo
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Abstract
The utility model relates to a physiological weak current signal acquisition processing system and apparatus. The system comprises at least one acquisition processing device, and a signal coordinator connected with the acquisition processing device; the acquisition processing device is used for acquiring an analog physiological weak current signal from an organism, performing multistage amplification, obtaining an analog physiological signal through multistage filtering processing, converting the analog physiological signal to a digit physiological signal, and transmitting the digit physiological signal to the signal coordinator; the signal coordinator is used for receiving the digit physiological signal, performing processing of the digit physiological signal, controlling coding of the digit physiological signal to a digit physiological communication signal, and transmitting the digit physiological communication signal into a wireless communication network. The device comprises at least one signal acquisition sensor, at least one amplification unit, at least one filter circuit unit, an analog-to-digital converter, and a transmission module; the physiological weak current signal acquisition processing system and apparatus are advantaged by small volume, low power dissipation, low cost, and capability of safely, accurately, and stably acquiring and processing the physiological weak current signal.
Description
Technical field
This utility model relates to a kind of physiological signal acquisition process technical field, especially relates to physiology weak electric signal acquisition processing system and devices such as a kind of electrocardiosignal.
Background technology
In each field, exist a lot of data signal needs to be gathered in real time and the situation of monitoring, if adopt artificial the collection and monitoring, time and effort consuming then, inefficiency; If each signal source configuration one cover is gathered monitoring system, certainly will cause the waste of resource and unnecessary cost input.
At medical field, for many patients, its physiological parameter can reflect its state of an illness state and therapy rehabilitation situation effectively, therefore, the acquisition process of the physiology weak electric signal of reflection patient physiological parameter, very important to its rehabilitation and treatment.
Cardiovascular and cerebrovascular disease patient for example, the clinician can estimate the health status of estimating the patient, rehabilitation situation through the electrocardiosignal of checking patient's physiological parameter record.Particularly; Electrocardiosignal is as one of most important physiological parameter of cardiovascular and cerebrovascular vessel patient; Can estimate severity of disease to the clinician; In time grasp patient's physiological feature, and design the therapeutic scheme method, even redemption patient's life has important effect to patient's the concrete state of an illness.
The most of existence of existing physiology weak electric signal (like electrocardiosignal) acquisition process technology costs an arm and a leg, power consumption is high, volume is big; Shortcomings such as precision is low can't satisfy the needs of unmanned monitoring, mobile monitoring and remote monitoring such as human sensing net and animal physiological parameter monitoring net.
The utility model content
This utility model technical problem to be solved is to provide a kind of physiology weak electric signal acquisition processing system and device, its volume is little, low in energy consumption, cost low can be safely, accurately, acquisition process physiology weak electric signal stably.
For realizing the purpose of this utility model, this utility model provides a kind of physiology weak electric signal acquisition processing system, comprises at least one acquisition processing device, and a signal coordinating device that is connected with said acquisition processing device;
Said acquisition processing device; Collect simulation physiology weak electric signal from organism, carry out multistage amplification, and through obtaining simulating physiological signal after the multiple-stage filtering processing; Then said simulation physiological signal is converted into digital physiological signal, is transferred to the signal coordinating device;
Said signal coordinating device receives digital physiological signal, and after said digital physiological signal handled, control was encoded to digital physiology signal of communication with said digital physiological signal, sends in the cordless communication network.
More excellent; Described physiology weak electric signal acquisition processing system; Also comprise at least one far-end receiving system, receive the digital physiology signal of communication that the signal coordinating device sends out through cordless communication network, resolution digital physiology signal of communication obtains the physiology weak electric signal of organism and handles.
More excellent, said acquisition processing device comprises at least one signals collecting pick off, at least one amplifying unit, at least one filter circuit unit, and an analog-digital converter and a transport module;
Wherein, said signals collecting pick off is arranged on the organism relevant position, when organism carries out physiological activity, gathers simulation physiology weak electric signal from organism;
Said amplifying unit comprises that an instrument that is connected in series is each other amplified subelement and at least one secondary amplifies subelement, amplifies gathering the physiology weak electric signal that comes, and obtains simulating physiological signal; Said filter circuit unit; Comprise mutual placed in-line high pass filter, low pass filter, low frequency and high frequency wave trap; And the high pass filter other end is connected in series to said two-stage amplifier; The simulation physiological signal that receives after amplifying carries out filtering, and the low frequency or the high frequency wave trap other end are connected in series to analog-digital converter, and filtered simulation physiological signal is outputed to analog-digital converter; Said analog-digital converter will pass through amplification, filtered module physiological signal converts digital signal into, obtains digital physiological signal;
Said transport module, the digital physiological signal that said analog-digital converter is converted to is transferred to said signal coordinating device.
More excellent; Said acquisition processing device; Have and a plurality ofly parallel with one another amplify the amplification filtering passage that subelement, high pass filter, low pass filter, high frequency wave trap, low frequency wave trap are formed by said amplification instrument subelement, secondary; Amplification instrument subelement in each amplification filtering passage is connected with said signals collecting pick off respectively, receives the physiology weak electric signal of gathering; High frequency or low frequency wave trap in each amplification filtering passage are connected with analog-digital converter.
More excellent, said acquisition processing device also comprises a two-way multiselect one analog switch;
Said two-way multiselect one analog switch comprises a plurality of inputs; One outfan and a control drive end; Said a plurality of input is connected respectively to a plurality of signals collecting pick offs; Outfan is connected to amplifying unit, and the control drive end is connected to and drives the input controller, and control two-way multiselect one analog switch is in arbitrary moment of collection; Only open an input that is communicated with in a plurality of inputs, gather the physiology weak electric signal in one of them signals collecting pick off and be transferred to the filtering channel of forming by a said amplifying unit and filter circuit unit and carry out the amplification filtering processing.
More excellent, said signal coordinating device comprises at least one receiver module, a wireless communication transmissions module, and a control Coordination module and a serial communication module, wherein:
Said receiver module through the wire/wireless interface, receives the digital physiological signal that sends from said acquisition processing device;
Said wireless communication transmissions module is encoded to digital physiology signal of communication with the digital physiological signal that receives, and sends through cordless communication network;
Said control Coordination module, the digital physiological signal that the control receiver module receives sends to the wireless communication transmissions module through the serial communication module, and the digital physiological signal that control receives the wireless communication transmissions module is encoded to digital physiology signal of communication;
Said serial communication module, under the control of control Coordination module, the digital physiological signal that receiver module is received is transferred to the wireless communication transmissions module.
A kind of physiology weak electric signal acquisition processing device comprises at least one signals collecting pick off, at least one amplifying unit, at least one filter circuit unit, and an analog-digital converter and a transport module;
Wherein, said signals collecting pick off is arranged on the organism relevant position, is used for when organism carries out physiological activity, gathers simulation physiology weak electric signal from organism;
Said amplifying unit comprises that an instrument that is connected in series is each other amplified subelement and at least one secondary amplifies subelement, amplifies gathering the physiology weak electric signal that comes, and obtains simulating physiological signal; Said filter circuit unit; Comprise mutual placed in-line high pass filter, low pass filter, low frequency and high frequency wave trap; And the high pass filter other end is connected in series to said two-stage amplifier; The simulation physiological signal that receives after amplifying carries out filtering, and the low frequency or the high frequency wave trap other end are connected in series to analog-digital converter, and filtered simulation physiological signal is outputed to analog-digital converter; Said analog-digital converter will pass through amplification, filtered module physiological signal converts digital signal into, obtains digital physiological signal;
Said transport module, the digital physiological signal that said analog-digital converter is converted to transfers out.
More excellent; Said acquisition processing device has and a plurality ofly parallel with one another amplifies the amplification filtering passage that subelement, high pass filter, low pass filter, high frequency wave trap, low frequency wave trap are formed by said amplification instrument subelement, secondary; Amplification instrument subelement in each amplification filtering passage is connected with said signals collecting pick off respectively, receives the physiology weak electric signal of gathering; High frequency or low frequency wave trap in each amplification filtering passage are connected with analog-digital converter.
More excellent; Said each passage is connected to a signals collecting pick off respectively separately; Independently collect psychological weak electric signal; Through instrument amplify subelement, secondary amplifies signal processing circuits such as subelement, 0.05Hz high pass filter, 150Hz low pass filter, 35Hz wave trap and 50Hz wave trap, outputs to analog-digital converter, transfer out after controlling coding through transport module then.
More excellent, described a kind of physiology weak electric signal acquisition processing device also comprises a two-way multiselect one analog switch;
Said two-way multiselect one analog switch comprises a plurality of inputs; One outfan and a control drive end; Said a plurality of input is connected respectively to a plurality of signals collecting pick offs; Outfan is connected to amplifying unit, and the control drive end is connected to and drives the input controller, and control two-way multiselect one analog switch is in arbitrary moment of collection; Only open an input that is communicated with in a plurality of inputs, gather the physiology weak electric signal in one of them signals collecting pick off and be transferred to the filtering channel of forming by a said amplifying unit and filter circuit unit and carry out the amplification filtering processing.
The beneficial effect of this utility model: the physiology weak electric signal acquisition processing system and the device of this utility model, its volume is little, low in energy consumption, cost low can be safely, accurately, acquisition process physiology weak electric signal stably.Further, it carries out the passage switching of leading through analog switch, with one or multichannel physiology weak electric signal be reduced to single channel, greatly reduce size, cost and the power consumption of circuit.Simultaneously; This utility model adopts SOC (the System on a Chip of small size, little power consumption; System level chip) the radio frequency single-chip microcomputer carries out low power dissipation design as data acquisition and transmitter unit, and size, cost, the power consumption of whole radio physiological weak electric signal monitoring acquisition node are further reduced; Further; This utility model is through adopting purple honeybee (Zigbee) wireless network technology; With the node of physiology weak electric signal monitoring collecting unit, make it to satisfy the application need of unmanned monitoring, mobile monitoring and remote monitoring such as human sensing net, zoopery monitoring as purple honeybee (Zigbee) network.And further, it sends to far-end receiving system terminal through cordless communication network with physiology weak electric signal data, supplies remote detection, and control is used with medical treatment.
Description of drawings
Fig. 1 is this utility model embodiment physiology weak electric signal acquisition processing system structural representation;
Fig. 2 is this utility model embodiment acquisition processing device structural representation;
Fig. 3 has the acquisition processing device structural representation of two-way multiselect one analog switch for this utility model embodiment;
Fig. 4 is the sketch map of this utility model embodiment two-way multiselect one analog switching circuit structure;
Fig. 5 is purple honeybee (Zigbee) the wireless transmission single chip computer architecture sketch map of this utility model embodiment;
The Wave data sketch map that Fig. 6 receives for a passage in the test of this utility model embodiment physiology weak electric signal acquisition processing system.
The specific embodiment
For the purpose, technical scheme and the advantage that make this utility model physiology weak electric signal acquisition processing system and device clearer; Below in conjunction with concrete accompanying drawing and specific embodiment, this utility model physiology weak electric signal acquisition processing system and device are further elaborated.
Among this utility model embodiment, be example, the physiology weak electric signal acquisition processing system and the device of this utility model is described in detail with the electrocardiosignal; Promptly in this utility model embodiment, said physiology weak electric signal is an electrocardiosignal, but should be noted that; The described physiology weak electric signal of this utility model; Include but not limited to electrocardiosignal, also comprise the physiology weak electric signal of other human bodies, like eeg signal, skin haptic signal etc.Be that example is described this utility model just among this utility model embodiment with the electrocardiosignal; So that make those skilled in the art make much of this utility model; Rather than to the restriction of this utility model protection domain, this utility model protection domain is as the criterion with restricted portion in the claim.
But as a kind of embodiment, as shown in Figure 1, for this utility model is implemented physiology weak electric signal acquisition processing system structural representation.Wherein, the physiology weak electric signal acquisition processing system of this utility model embodiment comprises at least one acquisition processing device 100, and a signal coordinating device 200 that is connected with said acquisition processing device 100.
Said acquisition processing device 100; Be used for collecting simulation physiology weak electric signal from organism; Carry out multistage amplification; And handle (comprising high pass and LPF, trap processing etc.) through multiple-stage filtering and obtain simulating physiological signal, then said simulation physiological signal is converted into digital physiological signal, be transferred to signal coordinating device 200;
Said signal coordinating device 200 is used to receive digital physiological signal, and after said digital physiological signal handled, control was encoded to digital physiology signal of communication with said digital physiological signal, sends in the cordless communication network.
Preferably, but, between said acquisition processing device 100 and the said signal coordinating device 200, both can be wireless, also can be wired as a kind of embodiment.
More preferably, but as a kind of embodiment, wireless connections between said acquisition processing device 100 and the said signal coordinating device 200 connect through purple peak (Zigbee) wireless network.
Preferably; The physiology weak electric signal acquisition processing system of this utility model embodiment; Also comprise at least one far-end receiving system 300; Be used to receive the digital physiology signal of communication that signal coordinating device 200 sends out through cordless communication network, resolution digital physiology signal of communication obtains the physiology weak electric signal of organism and handles.
But as a kind of embodiment, said cordless communication network can be 2G cordless communication networks such as GSM, CDMA, also can be 3G cordless communication networks such as TD-CDMA, CDMA2000, WCDMA, more can be LTE cordless communication networks such as TD-LTE.
Said far-end receiving system 300 can be the various devices that receive wireless communication network signal that have, like computer, PAD, mobile phone, palm terminal etc.
Among this utility model embodiment, far-end receiving system 300 resolution digital physiology signals of communication obtain the physiology weak electric signal of organism and handle, and are a kind of prior aries, therefore, in this utility model embodiment, describe in detail no longer one by one.
Be example below with the electrocardiosignal, the acquisition processing device 100 of this utility model embodiment is described in detail.
But it is, among this utility model embodiment, as shown in Figure 2 as a kind of embodiment; Said acquisition processing device 100 comprises at least one signals collecting pick off 110, at least one amplifying unit 120; At least one filter circuit unit 130, and an analog-digital converter 141, one transport modules 142.
Wherein, said signals collecting pick off 110 is arranged on organism relevant position (like the human heart position), is used for when organism carries out physiological activity, gathers simulation physiology weak electric signal from organism;
What signals collecting pick off 110 collected is a kind of analogue signal, the physiological activity situation of its reflection organism, and in this utility model, the analogue signal that this kind collected is called simulation physiology weak electric signal.
But as a kind of embodiment; Said signals collecting pick off 110 can be SOC EGC analog sensors A DS194; Its integrated can be attached to organism surface, to faint electro-physiological signals, be respectively RA, LA, LL, RL like 4 electrode sample of human body surface (like the wrist place);
But as the another kind embodiment, said signals collecting pick off 110 can be SOC EGC analog sensors A DS1296 or ADS1298, the faint physiology weak electric signal acquisition electrode of respective inner is integrated 6 or 8 passages.
Said amplifying unit 120 is used for said simulation physiology weak electric signal is carried out multistage amplification, obtains simulating physiological signal, and it can be identified and handle.
Said filter circuit unit 130 is used for the said simulation physiological signal after said amplifying unit 120 amplifications is carried out high-pass filtering and LPF, carries out trap then and handles, and removes the interfering signal in the said simulation physiological signal that collects.
Said analog-digital converter 141 is used for converting process amplification, filtered module physiological signal into digital signal, obtains digital physiological signal.
Said transport module 142 is used for the digital physiological signal that said analog-digital converter is converted to is transferred to signal coordinating device 200.
Preferably, said amplifying unit 120 comprises that an instrument that is connected in series is each other amplified subelement 121 and at least one secondary amplifies subelement 122.
But as a kind of embodiment, it is high-gain, high input impedance, high cmrr, low noise that said instrument is amplified subelement 121, hang down drift, dynamic range is big and the ultraprecise instrument amplifier of stable performance, and it can be OPA128;
But as a kind of embodiment, it is the precision amplifier of high-gain that said secondary amplifies subelement 122, and it can be OPA2335.
Electrocardiosignal belongs to the biomedical a kind of simulation physiology weak electric signal of low frequency; Utilize the electrode collection from organism surface through the signals collecting pick off from the skin of organism (like human body); Its signal frequency is low, and (0.05～100Hz), genertor impedance is (about 1000K Ω) greatly, signal very faint (0.1～1mV); Add various interference and effect of noise, bring very big difficulty for the detection of electrocardiosignal.And; Frequency spectrum between the various interference of electrocardiosignal is overlapped; Some disturbs also the fundamental frequency with electrocardiosignal itself to coincide; Particularly near the power frequency 50Hz and the frequency multiplication thereof is disturbed, the baseline drift below the 1Hz is disturbed and 35Hz myoelectricity interference noise is very important interference source, in electrocardiosignal is handled, should eliminate or suppress, to improve the signal to noise ratio of electrocardiosignal.
The acquisition processing device 100 of this utility model embodiment; Characteristics according to electrocardiosignal; With high-gain, high input impedance, high cmrr, low noise, low drift, dynamic range is big and the ultraprecise instrument amplifier of stable performance such as OPA128 amplify 121 pairs on subelement as instrument and gather amplifying of coming, and guarantees to amplify accurately the electrocardiosignal that collects.Then, at least one precision amplifier such as the OPA2335 with high-gain carries out the secondary amplification as 122 pairs of electrocardiosignaies of at least one secondary amplification subelement.Amplify and secondary amplification amplification respectively through instrument, thereby both can guarantee accurately to amplify the electrocardiosignal that collects, can practice thrift cost again.
Preferably; But as a kind of embodiment, said filter circuit unit 130 comprises mutual placed in-line high pass filter 131, low pass filter 132, low frequency and high frequency wave trap 133,134; And high pass filter 131 other ends are connected in series to said secondary and amplify subelement 122; The simulation physiological signal that receives after amplifying carries out filtering, and the low frequency or the high frequency wave trap other end are connected in series to analog-digital converter 141, and filtered simulation physiological signal is outputed to analog-digital converter 141.
Among this utility model embodiment; But as a kind of embodiment; Also according to the characteristics of electrocardiosignal; Through high-frequency interferencing signal and the dc shift interfering signal beyond high and low pass filter 131, the 132 filtering electrocardio frequency ranges is set, making band connection frequency is 0.05～150Hz, disturbs through the high frequency wave trap 134 filtering power frequencies interference of 50Hz and the low frequency wave trap 133 filtering myoelectricities of 35Hz again.
Electrocardiosignal through after amplification, the Filtering Processing is transported to analog-digital converter (ad/da converter) 141; Convert digital signal (digital physiological signal) into through analog-digital converter 141; Send to transport module 142, be transferred to signal coordinating device 200 by transport module 142.
Preferably, but as a kind of embodiment, said transport module 142 is a wire transmission module, and like serial port or cable network etc., perhaps wireless transport module is like Bluetooth wireless transmission module, WiFi wireless transport module.
More preferably, but as a kind of embodiment, among this utility model embodiment, said transport module is purple peak (Zigbee) wireless transport module.
But as a kind of embodiment; Preferably; The said acquisition processing device 100 of this utility model embodiment; Have and a plurality ofly parallel with one another amplify the amplification filtering passage that subelement 122, high pass filter 131, low pass filter 132, high frequency wave trap 134, low frequency wave trap 133 are formed by said amplification instrument subelement 121, secondary; Amplification instrument subelement 121 (collection terminal) in each amplification filtering passage is connected with said signals collecting pick off 110 respectively, receives the physiology weak electric signal of gathering; High frequency in each amplification filtering passage or low frequency wave trap (receiving terminal) 133,134 are connected with analog-digital converter 141, and formation can be carried out the multichannel physiology weak electric signal of having of multiple spot collection acquisition processing system.Be this utility model embodiment can carry out the multichannel physiology weak electric signal of having of multiple spot collection acquisition processing system; Have a plurality of amplification filtering passages; Each passage comprises a placed in-line amplifying unit 120 and a filter circuit unit 130 each other respectively, and each amplifying unit 120 comprises that an each other placed in-line instrument is amplified subelement 121 and at least one secondary amplifies subelement 122; Each filter circuit unit 130 comprises an each other placed in-line high pass filter 131, a low pass filter 132, a high frequency wave trap 134 and a low frequency wave trap 133; Be connected with a plurality of signals collecting pick offs 110 respectively in the end (collection terminal) in the passage, the other end (receiving terminal) is linked into analog-digital converter 141.
As shown in Figure 2; But as a kind of embodiment; For having multichannel acquisition processing device 100; Each passage is connected to a signals collecting pick off 110 respectively separately, independently collects psychological weak electric signal, amplifies signal processing circuits such as subelement 121, secondary amplification subelement 122,0.05Hz high pass filter 131,150Hz low pass filter 132,35Hz wave trap 133 and 50Hz wave trap 134 through instrument; Output to analog-digital converter 141, transfer out after controlling coding through transport module 142 then.
But as a kind of embodiment; Said transport module 142 can be the single-chip microcomputer that has radio-frequency module with control codec functions that has input port (like IIC or SPI or I/O interface); As through purple honeybee (Zigbee) wireless network transmissions the time; Have the center control chip of purple honeybee (Zigbee) wireless network codec functions and the single-chip microcomputer of purple honeybee (Zigbee) radio-frequency module; Digital physiological signal after amplification, filtering, the conversion is carried out purple honeybee (Zigbee) Wireless Network Coding, launch through purple honeybee (Zigbee) wireless network then.
But as the another kind embodiment; This utility model embodiment can carry out the multichannel acquisition processing device 100 of having of multiple spot collection; To the conforming characteristics of multichannel collecting; As shown in Figure 3; One two-way multiselect, one analog switch 150 is set between signals collecting pick off 110 and amplification filtering passage, is used for the switching of leading of simulation physiology weak electric signal to a plurality of signals collecting sensor acquisition, the simulation physiology weak electric signal that the various signals pick-up transducers is collected sends to analog-digital converter through same amplification filtering passage.
Promptly; This utility model embodiment can carry out the acquisition processing device 100 that multiple spot is gathered; As shown in Figure 3, comprise the amplification filtering passage that an amplifying unit 120 and a filter circuit unit 130 are formed, also comprise a two-way multiselect one analog switch 150; Said two-way multiselect one analog switch 150 comprises a plurality of inputs; One outfan and a control drive end, said a plurality of inputs (wherein a tunnel) are connected respectively to a plurality of signals collecting pick offs 110, and outfan (another road) is connected to amplifying unit 120; The control drive end is connected to and drives input controller (single-chip microcomputer); And control two-way multiselect one analog switch 150 in arbitrary moment of gathering, and only open an input that is communicated with in a plurality of inputs, gather the physiology weak electric signal in one of them signals collecting pick off 110 and be transferred to the amplification filtering passage and carry out the amplification filtering processing.Like this, through utilizing the switching of leading of two-way multiselect one analog switch 150, a plurality of passages are reduced to a passage, thereby the size of dwindling circuit reduces cost and power consumption.
But as a kind of embodiment; Said two-way multiselect one analog switch 150 circuit are as shown in Figure 4; When the I/O port is 00,01,10, choose LA (left hand electrocardiosignal) and RA (right hand electrocardiosignal), LA (left hand electrocardiosignal) and LL (left lower limb electrocardiosignal), RA (right hand electrocardiosignal) and LL (left lower limb electrocardiosignal) to insert the electrocardiosignal blood processor respectively.
The acquisition processing device 100 of this utility model embodiment is through two-way multiselect one analog switch 150; Realize the data collection of multiplexed signal sampling pick off 110; And through time-division processing, realize and the data acquisition of a plurality of signals collecting pick offs 110, avoid the conflict of physiology weak electric signal; And the state of monitor signal at any time, guarantee the normal of communication.
Further; But as a kind of embodiment; This utility model embodiment can carry out the acquisition processing device 100 that multiple spot is gathered, and is as shown in Figure 3, and analog-digital converter 141, transport module 142 are integrated in the single-chip microcomputer; And this single-chip microcomputer is connected to said two-way multiselect one analog switch 150, controls the open and close of each road multiselect one switch in said two-way multiselect one analog switch 150.
But as a kind of embodiment; As shown in Figure 5; Among this utility model embodiment, said single-chip microcomputer adopts purple honeybee (Zigbee) single-chip microcomputer of SOC level CC2530 to realize, wherein; Said purple honeybee (Zigbee) single-chip microcomputer CC2530 comprises one 14 analog-digital converters and RF radio-frequency module, thereby dwindles circuit size; Adopt Zigbee2006 or Zigbee2007 wireless communication protocol stack to carry out networking, networking is very convenient.Among this utility model embodiment, adopt purple honeybee (Zigbee) technology, its communication performance is good, and capacity of resisting disturbance is strong, low-power consumption, and low cost, networking is simple, makes the design of wireless receiving and dispatching node be very easy to realize.
But as a kind of embodiment; Purple honeybee (Zigbee) single-chip microcomputer of the SOC level of this utility model embodiment CC2530 has and is used to receive the physiology weak electric signal of acquisition processing device 100 collections and carries out analog-to-digital A/D interface and the I/O interface that is used for the digital signal input and output, can connect and input/output signal; Also comprise SPI interface that is used for serial peripheral equipment and the IIC interface that is used to be connected internal integrated circuit simultaneously.
But as a kind of embodiment, preferably, said CC2530 also has control line interface and serial communication circuit interface, and the control line interface comprises the ON/OFF output interface and resets output interface; The serial communication circuit interface comprises TX serial output interface and RX serial input interface.
But, when physiology weak electric signal (initial data) is gathered, at first through spi bus sensors A DS1294 is sent sample command by single-chip microcomputer CC2530 as a kind of embodiment; 4 electrode sample through attached to human body surface (like the wrist place) arrive faint physiology weak electric signal, are respectively RA, LA, LL, RL, wherein; RA and LA are first passage, and RA and LL are second channel, and LA and LL are third channel; Directly be transferred to the differential input end of the chip of ADS1294, then, amplifying unit amplifies signal; After filter circuit unit filtering and 24 s' modulus (A/D) conversion, generate 24 primary electrocardiosignal on 3 road diverse locations again.
But as a kind of embodiment, as shown in Figure 3, said acquisition processing device 100 also comprises one drive circuit unit 170, is connected to said amplifying unit 110, is used to drive acquisition processing device 100, thereby removes the interchange common mode disturbances that human body carries.
Preferably, said drive circuit unit 170 is the driven-right-leg circuit unit, and it is connected to the right lower limb of human body, utilizes right lower limb electrocardiosignal (RL) to drive each components and parts in the amplification filtering passage.
But as a kind of embodiment; Because there is the feedback control loop that exchanges interference voltage in drive circuit, has alternating current through human body, becomes unsafe factor; The acquisition processing device 100 of this utility model embodiment; Also comprise a holding circuit unit 160, be connected between a plurality of signals collecting pick offs and the said two-way multiselect one analog switch/amplifying unit, be used for the electric current that is back to organism is carried out current limliting.
But as a kind of embodiment, said holding circuit unit 160 is for being connected on a plurality of current-limiting resistances between said a plurality of signals collecting pick off 110 and two-way multiselect one analog switch 150/ amplifying unit 110 respectively.
Further; But,, can wear electrode by user oneself because this device can be a kind of portable instrument as a kind of embodiment; The generating electrodes situation not putting well or come off sometimes; Therefore, the acquisition processing device 100 of this utility model embodiment comprises that also one is connected in parallel on leading between a plurality of signals collecting pick offs 110/ holding circuit unit 160 and two-way multiselect one analog switch 150/ amplifying unit 110 and comes off and detect and warning circuit unit 180; Thereby be used at signals collecting pick off 110 sending alarm signal owing to do not install or come off and make when not collecting the physiology weak electric signal.
But as a kind of embodiment, said detection and the warning circuit unit 180 of coming off that lead, it starts end and is connected to purple honeybee (Zigbee) single-chip microcomputer CC2530, and it is opened or closes by purple honeybee (Zigbee) single-chip microcomputer CC2530 Single-chip Controlling.
The signal coordinating device 200 of following further explain this utility model embodiment.
But as a kind of embodiment, as shown in Figure 1, the signal coordinating device 200 of this utility model embodiment comprises at least one receiver module 210, one wireless communication transmissions modules 220, and a control Coordination module 230 and serial communication module 240, wherein:
Said receiver module 210 is used for through the wire/wireless interface, receives the digital physiological signal that sends from said acquisition processing device 100;
Said wireless communication transmissions module 220 is used for the digital physiological signal that receives is encoded to digital physiology signal of communication, sends through cordless communication network;
Said control Coordination module 230; Be used to control the digital physiological signal that receiver module 210 receives and send to wireless communication transmissions module 220, and the digital physiological signal that control receives wireless communication transmissions module 220 is encoded to digital physiology signal of communication through serial communication module 240;
Said serial communication module 240 is used under the control of control Coordination module 230, and the digital physiological signal that receiver module 210 is received is transferred to wireless communication transmissions module 220.
Digital physiological signal is encoded to digital physiology signal of communication, and being about to digital signal encoding is that signal of communication is a kind of prior art, therefore, in this utility model embodiment, describes in detail no longer one by one.
But as a kind of embodiment; Said receiver module 210 can be to adopt purple honeybee (Zigbee) single-chip microcomputer of SOC level CC2530 to realize; Wherein, Said purple honeybee (Zigbee) single-chip microcomputer CC2530 comprises one 14 analog-digital converters and RF radio-frequency module, and said control Coordination module is integrated into wherein, thereby dwindles circuit size; Adopt Zigbee2006 or Zigbee2007 wireless communication protocol stack to carry out networking, networking is very convenient.Among this utility model embodiment, adopt purple honeybee (Zigbee) technology, its communication performance is good, and capacity of resisting disturbance is strong, low-power consumption, and low cost, networking is simple, makes the design of wireless receiving and dispatching node be very easy to realize.
But as a kind of embodiment, said wireless communication transmissions module 220 can be a TC 35IGSM module.The TC35IGSM module is a technical grade gsm module of supporting the Chinese short message breath; Be operated in EGSM900 and GSM1800 two-band; Current drain very low (3.5mA); But transferring voice and digital signal can also can be realized restarting and fault recovery through AT order transmitted in both directions instruction and data through AT order or cut-off signals.
But as a kind of embodiment; In the present embodiment; Can give the startup end (the 15th foot) of TC35i module through an I/O interface low level of output (greater than 100MS) by the control Coordination module 230 that is integrated among the single-chip microcomputer CC2530, start TC35i module access to wireless communication network (like the GSM network); The control Coordination module holds the I/O interface of (the 32nd foot) to read the state of module through the SYNC (Synchronize, synchronous) that is connected to the TC35i module; The control Coordination module is directly closed gsm module or is closed the TC35i module for the EMERGOFF (EMERGOFF, accident is stopped) (the 31st foot) of TC35i module through low level greater than 3.2S of I/O interface output of CC2530 through the AT order.
After making that through the I/O interface TC35i module starts; Control Coordination module control serial communication module is passed through serial port; Data are sent to the TC35i module with 9600 baud rate, and the TC35i module is encoded digital physiological signal data and is obtained digital physiology signal of communication and send to the far-end receiving system through cordless communication network (like the gsm wireless network); After pending data all sent and finishes, the control Coordination module was through the I/O interface, and the TC35i module is closed in control.
As shown in Figure 5, purple honeybee (Zigbee) single-chip microcomputer CC2530 is through said control Coordination module, utilizes two I/O interfaces and suffers from mouthful switch that comes to control respectively the TC35IGSM module and reset and the transmission and the reception of data.The traffic rate of serial communication module is 9600Kbps, adopts 8 asynchronous communication modes, and 1 is start bit, and 8 is data bit, and 1 is position of rest, can adopt various point-to-point (PPP) agreement, perhaps P2P agreement, perhaps PUSH protocol transmission digital signal.
Preferably; Said purple honeybee (Zigbee) single-chip microcomputer CC2530 and acquisition processing device 100/TC 35IGSM module also comprise an encryption and decryption compression module respectively; Be used for utilizing enciphering and deciphering algorithm and compression algorithm to carry out the encryption and decryption processed compressed to the digital physiological signal that between purple honeybee (Zigbee) single-chip microcomputer CC2530 and acquisition processing device 100/TC 35IGSM module, transmits; Be beneficial to encryption safe and dwindle memory space, thereby can adapt to the different application of tele-medicine context of detection.
But as a kind of embodiment, said enciphering and deciphering algorithm can be various symmetrical enciphering and deciphering algorithms, like the HASH algorithm, and DES algorithm, 3DES algorithm, TDEA algorithm, Blowfish algorithm, RC5 algorithm, IDEA algorithm etc.; Also can be various asymmetric enciphering and deciphering algorithms, like RSA, Elgamal, knapsack algorithm, Rabin, D-H, ECC algorithm etc.
But as a kind of embodiment, said compression algorithm can be like MPEG compression algorithm etc.
Be integrated into switch that 230 two I/O interfaces of control Coordination module and serial ports among the single-chip microcomputer CC2530 control TC 35I module respectively and reset and the transmission and the reception of data.But as a kind of embodiment, the traffic rate between said TC 35IGSM module and the CC2530 is 9600bps, adopts 11 asynchronous communication modes, 1 start bit, 8 bit data positions, 1 bit parity check position, 1 position of rest.But as a kind of embodiment, in order to guarantee normally carrying out and data integrity of transmitting terminal CC2530 and receiving terminal TC35I communication, available P2P (end-to-end) communications protocol is carried out transfer of data, is specially among this utility model embodiment:
1) transmitting terminal CC2530 transmission synchronization frame begins the data transmission, and synchronization frame is informed receiving terminal TC35I with this data bulk that is ready for sending (Frame) simultaneously, so that receiving terminal is checked the sequence of Frame;
2) control frame is sent by receiving terminal TC35I, when receiving terminal TC35I relief area when full, give transmitting terminal CC2530 with transmission control frame, request suspends sends, and after pending data is handled, recovers to send; Perhaps receiving terminal TC35I receive the Frame mistake (the ID sequence not to or data check wrong), then transmission control frame requires to resend this frame data for transmitting terminal CC2530.
Frame is the data of required transmission, transmitting terminal CC2530 will be in order the transmission of a frame one frame up to end.
In communication process; If there is interference to cause error in data; Receiving terminal TC35I can be through Frame ID the whether correct and even-odd check of sequence whether correctly judged whether whether mistake of frame losing and data; After detecting frame losing and error in data, can come the requirement data re-transmitting through control frame, therefore reduced the influence of interfering signal to communication; Guarantee running without interruption of communication through modes such as recoveries synchronously and certainly simultaneously, guarantee the correctness of data, and guarantee the safety of data through data encrypting and deciphering through verification.
But as a kind of embodiment, the synchronization frame form of this utility model embodiment is:
| ID (1 byte) | Data frame number (1 byte, maximum 254 frame data) |
| ?0X00 | 0X01....0XFE |
The control frame form is:
Data frame format is:
| ID (1 byte) | Data (1 byte) |
| ?0X01...0XFE | Send data |
But as a kind of embodiment, in the present embodiment, the encryption and decryption of Frame data adopts the HASH algorithm to carry out encryption and decryption.
More preferably; As shown in Figure 1, but as a kind of embodiment, the physiology weak electric signal acquisition processing system of this utility model embodiment; Also comprise power management module 400, being used to acquisition processing device 100 provides power supply with signal coordinating device 200 and controls the power supply power supply.
Said power management module 400 comprises at least one power supply 410 that electric energy is provided, and the power supply control chip 420 of the said power supply 410 of a control.
But as a kind of embodiment; Said power supply is the small size poly-lithium battery, and its voltage range is 2.7V～4.2V, and said power supply control chip boosts through opening-and voltage-dropping type voltage stabilizing chip comes stabilized supply voltage; When the battery input voltage changes between 2.7V-4.2V; Said power supply control chip will be adjusted the conducting electric current of internal power metal-oxide-semiconductor through feedback circuit, thereby keep the 3.3V that is stabilized in of output voltage; It is through overcurrent, overvoltage protection, to improve the safety and the stability of Circuits System.
But as a kind of embodiment; Said power management module 400 is also connected to leading detection and the warning circuit unit 180 of coming off; Whether be used to detect power electrode connects; Carry out low pressure simultaneously and detect, and detecting that power electrode does not connect or supply voltage when being lower than preset value, send come off to leading detection and warning circuit unit of alarm signal and report to the police.
The impedance meeting of power electrode is along with the time reduces gradually, so whether this utility model embodiment connect through power management module 400 continuous detecting electrodes, in case come off, leading comes off detects and the user will be reminded in warning circuit unit 400; 400 pairs of power supplys of power management module detect simultaneously, when supply voltage is lower than the predeterminated voltage value, carry out low pressure alarming, remind the user in time to charge.
Beneficial effect for the physiology weak electric signal acquisition processing system of verifying this utility model embodiment; This utility model utilizes this system that human ecg signal is tested; The circuit board of acquisition processing device 100 wherein is of a size of: 33mm*45mm; Power consumption:＜30mA, with the poly-lithium battery power supply of 1000mAh, but continuous operation is more than 36 hours; Wherein the test effect of a passage (wrist place signal) as shown in Figure 6 is fit to the application of unmanned monitoring such as human sensing net, zoopery monitoring and mobile monitoring very much.
This utility model embodiment has realized the collection and the remote transmission of various physiology weak electric signals such as electrocardiosignal through wire/wireless LAN (like the Zigbee wireless network) and remote radio communication network (like GSM/GPRS) are combined with increasing tele-medicine monitoring requirements.Among this utility model embodiment, adopted like purple honeybee wire/wireless communication technology such as (Zigbee) and carried out local networking and data acquisition process, made things convenient for the patient, reduced cost and power consumption, improved efficient.And adopt like wireless communication technologys such as GSM/GPRS, utilize ubiquitous cordless communication network, realized stable no journey network data transmission and control.Both combinations make the advantage of wireless telecommunications be fully utilized, and have reduced the application cost of tele-medicine electrocardio-data collection and processing.Wherein, the acquisition processing device 100 of this utility model embodiment, it has dwindled circuit size greatly through many-sided optimization, has reduced cost and power consumption.Further, this utility model embodiment carries out wireless networking through adopting purple honeybee (Zigbee) technology, improved this utility model system performance and capacity of resisting disturbance, reduce cost and power consumption, make wireless networking be highly susceptible to realization.
The preferred example that the above is merely this utility model is not limited to this utility model, and for a person skilled in the art, this utility model can have various changes and variation.All within the spirit and principle of this utility model, any modification of being made, be equal to replacement, improve, all should be included in the protection domain of this utility model.
Claims (6)
1. a physiology weak electric signal acquisition processing system is characterized in that, comprises at least one acquisition processing device, and a signal coordinating device that is connected with said acquisition processing device;
Said acquisition processing device; Collect simulation physiology weak electric signal from organism, carry out multistage amplification, and through obtaining simulating physiological signal after the multiple-stage filtering processing; Then said simulation physiological signal is converted into digital physiological signal, is transferred to the signal coordinating device;
Said signal coordinating device receives digital physiological signal, and after said digital physiological signal handled, control was encoded to digital physiology signal of communication with said digital physiological signal, sends in the cordless communication network.
2. physiology weak electric signal acquisition processing system according to claim 1; It is characterized in that; Also comprise at least one far-end receiving system; Receive the digital physiology signal of communication that the signal coordinating device sends out through cordless communication network, resolution digital physiology signal of communication obtains the physiology weak electric signal of organism and handles.
3. physiology weak electric signal acquisition processing system according to claim 1 and 2 is characterized in that said acquisition processing device; Comprise at least one signals collecting pick off; At least one amplifying unit, at least one filter circuit unit, and an analog-digital converter and a transport module;
Wherein, said signals collecting pick off is arranged on the organism relevant position, when organism carries out physiological activity, gathers simulation physiology weak electric signal from organism;
Said amplifying unit comprises that an instrument that is connected in series is each other amplified subelement and at least one secondary amplifies subelement, amplifies gathering the physiology weak electric signal that comes, and obtains simulating physiological signal; Said filter circuit unit; Comprise mutual placed in-line high pass filter, low pass filter, low frequency and high frequency wave trap; And the high pass filter other end is connected in series to said two-stage amplifier; The simulation physiological signal that receives after amplifying carries out filtering, and the low frequency or the high frequency wave trap other end are connected in series to analog-digital converter, and filtered simulation physiological signal is outputed to analog-digital converter; Said analog-digital converter will pass through amplification, filtered module physiological signal converts digital signal into, obtains digital physiological signal;
Said transport module, the digital physiological signal that said analog-digital converter is converted to is transferred to said signal coordinating device.
4. physiology weak electric signal acquisition processing system according to claim 3; It is characterized in that; Said acquisition processing device; Have and a plurality ofly parallel with one another amplify the amplification filtering passage that subelement, high pass filter, low pass filter, high frequency wave trap, low frequency wave trap are formed by said amplification instrument subelement, secondary, the amplification instrument subelement in each amplification filtering passage is connected with said signals collecting pick off respectively, the physiology weak electric signal of reception collection; High frequency or low frequency wave trap in each amplification filtering passage are connected with analog-digital converter.
5. physiology weak electric signal acquisition processing system according to claim 3 is characterized in that, said acquisition processing device also comprises a two-way multiselect one analog switch;
Said two-way multiselect one analog switch comprises a plurality of inputs; One outfan and a control drive end; Said a plurality of input is connected respectively to a plurality of signals collecting pick offs; Outfan is connected to amplifying unit, and the control drive end is connected to and drives the input controller, and control two-way multiselect one analog switch is in arbitrary moment of collection; Only open an input that is communicated with in a plurality of inputs, gather the physiology weak electric signal in one of them signals collecting pick off and be transferred to the filtering channel of forming by a said amplifying unit and filter circuit unit and carry out the amplification filtering processing.
6. physiology weak electric signal acquisition processing system according to claim 1 and 2 is characterized in that said signal coordinating device comprises at least one receiver module, a wireless communication transmissions module, and a control Coordination module and a serial communication module, wherein:
Said receiver module through the wire/wireless interface, receives the digital physiological signal that sends from said acquisition processing device;
Said wireless communication transmissions module is encoded to digital physiology signal of communication with the digital physiological signal that receives, and sends through cordless communication network;
Said control Coordination module, the digital physiological signal that the control receiver module receives sends to the wireless communication transmissions module through the serial communication module, and the digital physiological signal that control receives the wireless communication transmissions module is encoded to digital physiology signal of communication;
Said serial communication module, under the control of control Coordination module, the digital physiological signal that receiver module is received is transferred to the wireless communication transmissions module.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102599901A (en) * | 2012-02-10 | 2012-07-25 | 无锡先凯智能科技有限公司 | Physiological weak current signal acquiring and processing system and device |
| CN105091041A (en) * | 2014-05-09 | 2015-11-25 | 叶永青 | Remote gas stove switch device based on wireless communication network |
| CN106327834A (en) * | 2016-08-31 | 2017-01-11 | 北京浩坤科技有限公司 | Multi-channel equipment and method for acquiring signals |
| CN107714036A (en) * | 2017-09-28 | 2018-02-23 | 清华大学深圳研究生院 | A kind of headband structure with eeg signal acquisition system |
| CN111936101A (en) * | 2018-03-30 | 2020-11-13 | 保迪弗兰德有限公司 | Massage device and user terminal for providing pressure index |
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2012
- 2012-02-10 CN CN 201220042612 patent/CN202589511U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102599901A (en) * | 2012-02-10 | 2012-07-25 | 无锡先凯智能科技有限公司 | Physiological weak current signal acquiring and processing system and device |
| CN105091041A (en) * | 2014-05-09 | 2015-11-25 | 叶永青 | Remote gas stove switch device based on wireless communication network |
| CN106327834A (en) * | 2016-08-31 | 2017-01-11 | 北京浩坤科技有限公司 | Multi-channel equipment and method for acquiring signals |
| CN107714036A (en) * | 2017-09-28 | 2018-02-23 | 清华大学深圳研究生院 | A kind of headband structure with eeg signal acquisition system |
| CN111936101A (en) * | 2018-03-30 | 2020-11-13 | 保迪弗兰德有限公司 | Massage device and user terminal for providing pressure index |
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