CN103961084A - Portable uterine contraction pressure monitoring system based NFC and bluetooth - Google Patents
Portable uterine contraction pressure monitoring system based NFC and bluetooth Download PDFInfo
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Abstract
The invention relates to a portable uterine contraction pressure monitoring system based the NFC and the bluetooth. The portable uterine contraction pressure monitoring system comprises a uterine contraction pressure signal acquisition and wireless transmission hardware module and an Android mobile phone upper computer application. A uterine contraction pressure signal output by a sensor is transmitted to a microcomputer after being amplified and filtered to perform AD acquisition conversion, and undistorted acquisition of the uterine contraction pressure signal of a pregnant woman can be achieved. The processed uterine contraction pressure signal is transmitted to an Android mobile phone by means of the NFC and the bluetooth, the relevant application developed in the Android mobile phone performs corresponding computing and processing on the received signal, and functions of signal display, storage and remote transmission can be achieved. By means of the portable uterine contraction pressure monitoring system based the NFC and the bluetooth, acquisition, transmission and storage of the uterine contraction pressure signal are achieved, and the traditional signal acquisition and transmission processes can be simplified.
Description
Technical field
The invention belongs to technical field of medical instruments, relate to a kind of portable uterine contraction pressure monitor system based on NFC and bluetooth.
Background technology
Uterine contraction and Fetal Heart Rate are that two very important products are examined indexs clinically, abnormal with respect to Fetal Heart Rate, and uterine contraction can more early play forewarning function to anemia of pregnant woman's premature labor, miscarriage extremely.But, because most anemia of pregnant woman is that the first tire lacks relevant experience, to uterotonic experience and judgement a little less than.A lot of anemia of pregnant woman are in the danger that occurs violent stomachache and have colporrhagia, flow liquid (one's water breaks) just can be appreciated that premature labor or miscarriage clinically.Now Zai Qu hospital checks often lately, causes the death of abnormal fetal heart rate or fetus.
Be accompanied by being on the rise and continuous innovation and the development of the related-art technology such as electronics, communication of the problems such as current Expensive and hard to visit doctors, medical apparatus and instruments starts to present the trend to portability, family oriented, web development, and the application of Radio Transmission Technology is the very strong driving force that promotes this trend.
Bluetooth technology has been subjected to increasing concern in the last few years as a kind of short-range Radio Transmission Technology, because it has the advantages such as safe, capacity of resisting disturbance is strong, easy to use, compatibility is good, be applied to increasing engineering field.When Bluetooth technology is applied to the short-range communication of many equipment rooms, need to consider the factors such as frequency band is multiplexing, therefore before many equipment rooms carry out transfer of data, need to carry out attended operation, for unpaired equipment, need advanced line search, input password, join peering.This process often needs 5-6 seconds, even needs time of more growing under complex environment, reduces greatly the operability of system.
NFC(near-field communication) be a kind of new technique that is applied to wireless near field communication, the operating process of Bluetooth pairing has been simplified in its appearance, has improved the practicality of Bluetooth technology.It is to develop at radio RF recognition technology RFID with on the basis that closely interconnection technique combines, by closely (in 10cm) touching realization communication of two equipment.By NFC technology, set up bluetooth and connect, then in conjunction with the transmission technology of NFC and bluetooth, both solved the complexity problem of traditional connected mode, guaranteed again the safety and reliability of transfer of data simultaneously.
Along with the develop rapidly of communication technology, mobile phone has become requisite means of communication in people's daily life.The smart mobile phone that carries Android operating system, the high opening based on its platform, the development scheme of convenience and high-efficiency, become the highest mobile phone operating system of existing market occupation rate.In conjunction with NFC and Bluetooth technology, and the application that utilizes Android mobile phone development to receive, process and show based on uterine contraction signal, people met for the portable requirement of uterine contraction pressure monitor system.
The present invention designs a kind of collection of portable uterine contraction pressure signal, transmission, display system based on NFC and Bluetooth technology, can conveniently realize the function such as Real-Time Monitoring, storage of uterine contraction pressure signal, and anemia of pregnant woman's physiological situation is carried out to real-time monitoring.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, designed a kind of portable uterine contraction pressure monitor system based on NFC and bluetooth.By the uterine contraction pressure signal of sensor output, after amplification, Filtering Processing, send into and in microcontroller, carry out AD Collect conversion, to realize the undistorted collection to anemia of pregnant woman's uterine contraction pressure signal, and utilize NFC and Bluetooth technology that uterine contraction pressure signal is after treatment transferred to Android mobile phone, the related application of developing on Android mobile phone is carried out corresponding computing and processing by the signal receiving, and realizes the function such as demonstration, storage, remote transmission of signal.
The technical solution used in the present invention: native system comprises the collection of uterine contraction pressure signal and forms with hardware module and Android mobile phone host computer application two parts of wireless transmission.
The hardware module of the collection of uterine contraction pressure signal and wireless transmission comprises following three parts: the wireless transmission circuit that signal acquisition circuit, dsPIC microcontroller peripheral circuit, HC-06 bluetooth module and Samsung NFC electronic tag form.
In signal acquisition circuit, use touch force sensor FSS1500NST to gather anemia of pregnant woman's uterine contraction pressure signal, because the voltage signal of its output is faint millivolt rank, subsequent treatment for the ease of signal, need to amplify it, adopt high-precision meter amplifier AD623 that differential signal is amplified to 28 times, can guarantee that signal has the good linearity, can guarantee that again the faint variation of pressure signal can be detected by AD converter simultaneously.In signal after amplification, comprise medium-high frequency interfering signal, need to carry out low-pass filtering treatment to it, adopt 10Hz RC low pass filter.
DsPIC microcontroller peripheral circuit is the main control circuit of whole system, and its major function comprises that LCD controls, by key control, A/D, changes bluetooth serial ports communication etc.Master control chip is used the dsPIC33FJ128MC706 chip of U.S. Wei Xin company, uses its AD to gather with modular converter the signal after amplification, Filtering Processing is carried out to AD collection and conversion with the frequency of 20Hz.
HC-06 bluetooth module is realized the conversion between serial ports and bluetooth, will be written to respectively in serial ports relief area through obtaining the high low byte of 10 AD digital values after A/D conversion, and HC-06 can send to host computer by the content in relief area.
Samsung NFC electronic tag is realized the pairing of Android mobile phone and HC-06 bluetooth module.Utilize NFC technology can realize the quick pairing of Android host computer and bluetooth module, possess the features such as convenient and swift, safe, low in energy consumption, solved the problems such as complicated in conventional arrangement mode, equipment power dissipation is large, transmission security is poor.
The application of Android mobile phone host computer mainly realizes reception, demonstration, the storage of uterine contraction pressure signal, the functions such as playback.Application and development mainly comprises with lower module: NFC response, Bluetooth matching, data receiver and demonstration, data storage, data readback.
NFC respond module realizes the operation response of Android mobile phone NFC electronic tag.Before touching response NFC label, AAR must be written in the record of NdefMessage in NFC electronic tag and go, corresponding Android is applied in and brush label and complete afterwards.When successful connection is set up, Android application can be read the NdefMessage object in Intent object, and the MAC Address of the HC-06 module of therefrom preserving in reading tag.
After Android mobile phone completes the pairing with bluetooth module, can receive the uterine contraction pressure signal after A/D conversion by Bluetooth communication.In traditional matching method, need to be by the application searches bluetooth equipment on mobile phone, the pairing of setting up Android smart mobile phone and HC-06 bluetooth module.And herein by means of NFC technology, by the MAC Address being stored in NFC electronic tag, set up Android smart mobile phone with the pairing of HC-06 bluetooth module.
Data receiver and display module complete the demonstration of collection, waveform and the index of correlation of uterine contraction signal.First, after Android smart mobile phone and HC06 module connect, by iostream Inputstream and Outputstream, realize uterine contraction signals collecting and the control stopping, and read the pressure data that host computer receives, then by self-defined Surface View, show that control completes the demonstration of the Specifications such as uterine contraction signal waveform and uterine contraction number of times, acquisition time.
Data memory module is realized the memory function of image data, and the uterine contraction data that slave computer is sended over are stored as binary file.
Data readback module reads out the uterine contraction pressure data of preserving in binary file, then by Surface View demonstration control, realizes Presentation Function, realizes thus the historical playback function of data.
Beneficial effect of the present invention: collection, transmission and the storage of the portable uterine contraction pressure signal based on NFC and Bluetooth technology, simplified traditional signals collecting and transmitting procedure.Anemia of pregnant woman be in can be quick and easy the physiological situation of self is carried out to real-time monitoring, the physiological situation of self is made early prevention, is early processed.
Accompanying drawing explanation
Fig. 1 structured flowchart of the present invention;
Fig. 2 system hardware structure figure;
Fig. 3 key circuit figure;
Fig. 4 liquid crystal display circuit figure;
Fig. 5 data storage circuitry figure;
Fig. 6 systems soft ware functional schematic;
Fig. 7 NFC responding process figure;
Fig. 8 Bluetooth pairing flow chart;
Fig. 9 signals collecting and flow for displaying figure;
Figure 10 signal is preserved flow chart;
Figure 11 signal playback flow chart.
The specific embodiment
Below in conjunction with the specific embodiment and accompanying drawing, describe the present invention.
As shown in Figure 1, the portable uterine contraction pressure monitor system based on NFC and bluetooth mainly comprises that slave computer signals collecting end and host computer signal receive and display end.The former is responsible for the pressure signal collecting to carry out AD conversion, then by bluetooth, sends to host computer.Host computer handles accordingly the signal receiving, and then realizes the functions such as demonstration, storage.
As shown in Figure 2, system hardware structure figure mainly comprises: power circuit, sensor circuit, preposition amplification and filter circuit, microcontroller peripheral circuit and wireless transmission circuit.Power circuit provides voltage for sensor circuit, preposition filtering and amplifying circuit, microcontroller peripheral circuit etc.Sensor adopts the touch force sensor that the model of Honeywell Inc. is FSS1500NST, and the pressure that this sensor can sensing 0-1800g has independent electric bridge, sensitivity is good.The advantages such as deviation is low.This sensor has 4 pins, and wherein pin 1 and pin 3 are connected on respectively VDD-to-VSS, and pin 2 and pin 4 are positive and negatives of differential output signal, is connected on respectively on the positive and negative pin that the signal of amplifier AD623 comes in and goes out.Preposition amplification, filter circuit mainly comprise the resistance R 2 of integrated operational amplifier AD623 and filter capacitor, resistance and control amplification.The pin 7 and 4 of AD623 is connected on respectively VDD-to-VSS, and pin 8 and 1 is connected on the two ends of resistance R 2, controls amplification.Pin 2 and 3 is connected on above the difference output of sensor.Pin 4 ground connection, pin 5 is connected on one end of RC filter resistance.RC wave filter is comprised of resistance and electric capacity, and input is connected on the output pin 5 of amplifier, the RB15 pin of output access microcontroller.Microcontroller and peripheral circuit thereof mainly comprise key circuit, liquid crystal display circuit, and data storage circuitry etc., it is realized as Fig. 3-5.The major function of NFC label has been the Bluetooth pairing of Android smart mobile phone, first toward the MAC Address and the AAR(Android Application Record that write HC-06 bluetooth module in NFC label), MAC Address is passed to Android smart mobile phone in Android smart mobile phone touching label, the Android application bag name that AAR specify labels is opened.MAC Address and AAR data are kept at NFC label inside as the NdefRecord of NdefMessage.
As shown in Figure 6, be systems soft ware functional schematic.
This systems soft ware mainly comprises four large functional module: NFC responses, Bluetooth matching connection, uterine contraction pressure signal acquisition and display, storage, playback.
NFC respond module mainly realizes following functions: the MAC Address that obtains bluetooth module HC06.By mobile phone, touch NFC label and set up pairing connection, obtain BluetoothSocket object simultaneously.Bluetooth matching module mainly realizes search and the connection between many equipment.The major function of uterine contraction pressure signal acquisition module is to read the pressure signal that slave computer transmits, and realizes the demonstration of the indexs of correlation such as waveform.Data memory module is realized the storage of uterine contraction pressure signal.The major function of data readback module is that the uterine contraction data of history collection are carried out to playback.
As shown in Figure 7, be NFC responding process figure.
In NFC respond module, mobile phone is touched to NFC label and set up Bluetooth communication.The process nature of touching is the touching of the built-in NFC antenna of Android smart mobile phone and NFC label, and the distance of touching should be in 10 centimetres.After completing touching operation, Android smart mobile phone will obtain Intent object, this object represents this label and load thereof, read this object and can obtain NdefMessage object, this object comprises MAC Address and the AAR(Android Application Record of corresponding HC-06 module), from AAR, we can obtain the Android application bag name that this label starts.When reading the MAC Address of bluetooth module, system will be opened bluetooth automatically, registration UUID.In MAC Address in reading NFC label, will return to BluetoothDevice object, the method providing by this object can obtain BluetoothSocket object.Corresponding global variable is set, the BluetoothSocket object obtaining is preserved as global variable, so that uterine contraction pressure signal acquisition module calling for this BluetoothSocket object.
As shown in Figure 8, be Bluetooth pairing flow chart.
In this module, use traditional Bluetooth pairing mode to complete HC-06 bluetooth module and be connected with the pairing of Android smart mobile phone.First, open bluetooth, registration BluetoothDevice.ACTION_FOUND and two broadcast of BluetoothAdapter.ACTION_DISCOVERY_FINISHED, then system starts to search for bluetooth equipment, and demonstrate the equipment searching in ListView shows, the touch event of ListView assembly is set.Select displayed entries corresponding to HC-06 bluetooth module, obtain the MAC Address of this bluetooth module.Registration UUID, by the MAC Address obtaining, utilizes the getRemoteDevice () method of BluetoothAdapter to obtain BluetoothDevice object, obtains immediately BluetoothSocket object.The connection of setting up Android smart mobile phone and bluetooth module by the connect () method of BluetoothSocket object.By the iostream of BluetoothSocket object, can be completed the Bluetooth communication of mobile phone and HC-06 module.
As shown in Figure 9, be uterine contraction pressure signal acquisition and display flow chart.
Uterine contraction pressure signal acquisition and display module mainly realizes the acquisition and display of signal.First, judged whether that corresponding pairing connects.Obtain the BluetoothSocket object in Application global variable, judge whether it is empty, if it is empty, do not complete the Bluetooth pairing of mobile phone and collecting device, cannot set up data connects, return to Bluetooth pairing interface, the mode of searching for bluetooth equipment by tradition completes Bluetooth pairing or adopts NFC label to complete Bluetooth pairing.When mobile phone and collecting device, set up after bluetooth is connected, can carry out uterine contraction signals collecting and display operation.First obtain the BluetoothSocket object in Application global variable, getInputStream () and getOutputStream () method by BluetoothSocket object obtain InputStream object and OutputStream object, read () by this input and output flow object and write () method can realize and the communicating by letter of slave computer bluetooth module, mobile phone can to HC-06 send instruction control microcontroller dsPIC33FJ128MC706 A/D conversion beginning and stop.Android smart mobile phone obtains the data after A/D conversion by InputStream, first frame head and the postamble of the data word throttling receiving are tested, when frame head and postamble are that character ' a ' is just regarded as valid data with the byte of ' b ', then the byte stream receiving is spliced between two, after having spliced, by pressure calibration function, digital AD value is converted to force value, and show final pressure waveform by self-defining Surface View, often receive a pressure data, upgrade display interface, thereby complete waveform, show.In the process of signals collecting and demonstration, the collection of stop signal at any time, and the data that receive are before stored with the form of binary file.
As shown in figure 10, be uterine contraction pressure signal Stored Procedure figure.
Before signal is preserved, first need triggering to stop collection event, click " stopping gathering " button.In receiving the process of signal, system can be stored in it in array temporarily, and the data in array are extracted, and writes function its form with file is carried out to persistence by file.
As shown in figure 11, be the flow chart of signal playback.
Click " data readback " button, system can call file function reading, and then in the dialog box ejecting, select to need the file of playback, file function reading can read the data in this file, then the data that read out are sent in Surface View assembly and shown, and ceaselessly refresh painting canvas, to reach dynamic display effect.
Work process of the present invention is: slave computer pressure signal collection terminal and host computer pressure signal acquisition and display end have formed the portable uterine contraction pressure monitor system based on NFC and bluetooth.Before the normal work of portable uterine contraction pressure monitor system, first by button, different force value is demarcated, the data that demarcation obtains are written in EEPROM, and object is that sensor unintentional nonlinearity is calibrated, and make more closing to reality value of the pressure that senses.During normal use, by liquid crystal display, can know current uterine contraction force value, by liquid crystal display and key-press input, can realize friendly man-machine interaction, by means of Bluetooth communication, the AD value that Collect conversion is obtained sends, and host computer receives with display end and receives pressure data, complete real-time monitoring function, observe anemia of pregnant woman's uterine contraction pressure changing, and the historical data collecting is preserved with the form of file, then by the remote transmission function of mobile phone, issue the server of hospital.
Below by reference to the accompanying drawings the specific embodiment of the present invention is described; but these explanations can not be understood to limit scope of the present invention; protection scope of the present invention is limited by the claims of enclosing, and any change on the claims in the present invention basis is all protection scope of the present invention.
Claims (1)
1. the portable uterine contraction pressure monitor system based on NFC and bluetooth, native system comprises uterine contraction pressure signal and gathers hardware module and the Android mobile phone host computer application two parts formation with wireless transmission, it is characterized in that:
The hardware module of the collection of uterine contraction pressure signal and wireless transmission comprises following three parts: the wireless transmission circuit that signal acquisition circuit, dsPIC microcontroller peripheral circuit, HC-06 bluetooth module and Samsung NFC electronic tag form;
In signal acquisition circuit, use touch force sensor FSS1500NST to gather anemia of pregnant woman's uterine contraction pressure signal, because the voltage signal of its output is faint millivolt rank, subsequent treatment for the ease of signal, need to amplify it, adopt high-precision meter amplifier AD623 that differential signal is amplified to 28 times, in the signal after amplification, comprise medium-high frequency interfering signal, need to carry out low-pass filtering treatment to it, adopt 10Hz RC low pass filter;
DsPIC microcontroller peripheral circuit is the main control circuit of whole system, Master control chip is used the dsPIC33FJ128MC706 chip of U.S. Wei Xin company, uses its AD to gather with modular converter the signal after amplification, Filtering Processing is carried out to AD collection and conversion with the frequency of 20Hz;
HC-06 bluetooth module is realized the conversion between serial ports and bluetooth, will be written to respectively in serial ports relief area through obtaining the high low byte of 10 AD digital values after A/D conversion, and HC-06 bluetooth module can send to host computer by the content in relief area;
Samsung NFC electronic tag is realized the pairing of Android mobile phone and HC-06 bluetooth module;
The application of Android mobile phone host computer mainly realizes reception, demonstration, the storage of uterine contraction pressure signal, playback function; Application and development mainly comprises with lower module: NFC respond module, Bluetooth matching module, data receiver and display module, data memory module, data readback module;
NFC respond module realizes the operation response of Android mobile phone NFC electronic tag; Before touching response NFC label, AAR is written in the record of NdefMessage in NFC electronic tag and goes, corresponding Android is applied in and brush label and complete afterwards; When successful connection is set up, Android application can be read the NdefMessage object in Intent object, and the MAC Address of the HC-06 bluetooth module of therefrom preserving in reading tag;
After Android mobile phone completes the pairing with HC-06 bluetooth module, by Bluetooth communication, receive the uterine contraction pressure signal after A/D conversion; By means of NFC technology, by the MAC Address being stored in NFC electronic tag, set up Android smart mobile phone with the pairing of HC-06 bluetooth module;
Data receiver and display module complete the demonstration of collection, waveform and the index of correlation of uterine contraction signal; First, after Android smart mobile phone and HC06 bluetooth module connect, by iostream Inputstream and Outputstream, realize uterine contraction signals collecting and the control stopping, and read the pressure data that host computer receives, then by self-defined Surface View, show that control completes the demonstration of uterine contraction signal waveform and uterine contraction number of times, acquisition time;
Data memory module is realized the memory function of image data, and the uterine contraction data that slave computer is sended over are stored as binary file;
Data readback module reads out the uterine contraction pressure data of preserving in binary file, then by Surface View demonstration control, realizes Presentation Function, realizes thus the historical playback function of data.
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