CN105476662A - Low-power-consumption wireless Bluetooth data transmission technology for gravida and fetus monitoring - Google Patents
Low-power-consumption wireless Bluetooth data transmission technology for gravida and fetus monitoring Download PDFInfo
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- CN105476662A CN105476662A CN201410524071.1A CN201410524071A CN105476662A CN 105476662 A CN105476662 A CN 105476662A CN 201410524071 A CN201410524071 A CN 201410524071A CN 105476662 A CN105476662 A CN 105476662A
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Abstract
The invention relates to the technical field of medical equipment and discloses a low-power-consumption wireless Bluetooth data transmission technology for gravida and fetus monitoring. The wireless Bluetooth data transmission technology adopts a fetus physiological parameter acquisition circuit for acquiring at least one of fetal heart rate, fetal movement and uterine contraction, and physiological signals acquired by the physiological parameter acquisition circuit are modulated and then sent to a mobile phone client with a monitoring system through a CC2540 low-power-consumption wireless Bluetooth chip based on the TI company. By ingeniously taking advantages of low power consumption, high safety, quickness in connection, wide application and the like of Bluetooth 4.0 wireless transmission, safety and quickness in transmission of the physiological parameters of perinatal fetuses are realized under the condition of low power consumption; fetus monitoring time is prolonged, and mobile medical treatment is realized; frequency of registering and queuing for diagnosis is reduced for gravidae.
Description
Technical field
The present invention relates to medical instruments field, particularly a kind of technology of based on low-power consumption bluetooth, fetus data being carried out to wireless transmission.
Background technology
Wireless fetus monitoring instrument is the collection adopting the physical effect of ultrasonic Doppler effect and pressure transducer Pregnant Women of Perinatal Period to be carried out to fetal monitoring data, by the fetal monitoring data wireless transmitting and receiving that Radio Transmission Technology will collect, thus reach the effect that fetus is guarded.Wireless fetus monitoring is a kind of short-range data transmission, applications of wireless technology has both been reduced in foetal monitor the difficulty of monitoring, also relieves the cable of anemia of pregnant woman in monitoring process and is wound around.And fetal monitoring is to the preferably embodiment of fetus at intrauterine growth situation and safe condition, and being the important guarantee of fetus and anemia of pregnant woman's safety, is also the effective means realizing prenatal and postnatal care.The core technology of wireless fetus monitoring device is the collection of data and the power problems of transmission and long-time monitoring, because fetal monitoring is long-time with continuously, and the power consumption of the drive circuit of transducer and radio transmitter is all larger, built-in lithium battery can not meet the power consumption needed for long-time monitoring at all, often need change battery, in monitoring process, interrupt monitoring.Can cause the discontinuous of data like this, the mood that interruption monitoring can affect anemia of pregnant woman causes fetal monitoring to be interfered.The mother and baby designing a kind of low-power consumption guards the transmission that wireless data transmission technology both can ensure the integrity of fetal monitoring data, reliability, safety and effectiveness, also can improve the quality of fetal monitoring and solve power problems.Low-power consumption bluetooth 4.0 Radio Transmission Technology because of its there is low-power consumption, low cost, the feature such as reliability is high, toggle speed is fast, and Bluetooth technology is widely used, without the need to specialized designs receiver module.The mother and baby of this low-power consumption of inventing herein guards the power consumption that wireless Bluetooth data transmission technology can reduce fetal monitoring greatly.
Summary of the invention
The object of the invention is to, by mother and baby's monitoring data transmission technology of a kind of low-power consumption of low-consumption wireless bluetooth 4.0 Technology design, solve the problems such as above-mentioned power consumption, be intended to the power consumption reducing fetal monitoring, improve the efficiency to fetal monitoring.
The mother and baby of a kind of low-power consumption designed by the present invention guards wireless Bluetooth data transmission technology, and its main circuit comprises the treatment circuits such as fetal rhythm moves, the Acquisition Circuit of uterine contraction pressure, fetal movement data, data frequency-selecting, amplification filtering, circuit based on the fetus data wireless transmit of the bluetooth 4.0 of low-power consumption.Main transport technology comprises the Radio Transmission Technology based on bluetooth 4.0 protocol stack.
Above-mentioned fetal rhythm moves the Acquisition Circuit with data such as uterine contraction pressures, the collection that fetal rhythm moves data produces by ultrasonic pulse the square-wave signal that circuit produces continuous print 2MHZ, square-wave signal is through process such as power amplifications, be loaded on the transducer of ultrasonic probe by matching network through ultrasound-driven circuit, the ultrasound wave that inverse piezoelectric effect produces enters fetomaternal, when ultrasound wave enters the beat generation Doppler effect of parent due to heart of fetus, thus make to return the hyperacoustic frequency generation frequency displacement come, echo frequency displacement ultrasonic signal produces acoustic-electric conversion and the echo-signal aroused in interest with fetus is converted to the signal of telecommunication on ultrasonic transducer.Fetus signal aroused in interest is just obtained after the process of demodulation box amplification filtering is carried out to the frequency displacement fetus signal aroused in interest of Doppler effect generation.Gathering uterine contraction pressure data is that pressure transducer by being placed on her abdominal converts the pressure sensed to the signal of telecommunication and obtains.The fetus collected aroused in interest and uterine contraction pressure signal, after the processing of circuit such as amplification filtering, just obtains the aroused in interest and uterine contraction pressure signal of the fetus of numeral by AD conversion.
Data pass in CC2540 chip through the Serial Port Transmission of CC2540 by fetal monitoring data obtained above, chip is by carrying out based on wireless blue tooth 4.0 protocol stack encapsulating data in the characteristic (Characteristic) of protocol stack to the programming of data, and client (mobile phone terminal) is by finding to be encapsulated in the fetus digital independent in characteristic thus to obtain fetal monitoring data to the characteristic of service end.
Accompanying drawing explanation
Fig. 1 is the structure chart that the mother and baby of a kind of low-power consumption of the present invention guards wireless Bluetooth data transmission technology.
Fig. 2 is ultrasound emission drive circuit block diagram of the present invention.
Fig. 3 is the data acquisition block diagram wireless based on low-consumption wireless bluetooth 4.0 of the present invention.
Fig. 4 is the layering of bluetooth 4.0 protocol stack of the present invention.
Fig. 5 is the flow chart of operating system abstract layer of the present invention (OSAL) polling tasks.
Fig. 6 is that client of the present invention and service end connect figure.
Fig. 7 is the data structure diagram of eigenvalue of the present invention in GATT.
Fig. 8 is the data that client of the present invention reads in service end characteristic.
detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and the specific embodiments, the present invention is further elaborated.Concrete enforcement described herein, only for explaining the present invention, is not intended to limit the present invention.
The mother and baby that the invention provides a kind of low-power consumption guards wireless Bluetooth data transmission technology, and the mother and baby of low-power consumption guards wireless blue tooth technology by using gated clock and closing the power consumption that agitator reduces transmission.The digital fetus data signal obtained receives through the serial ports of CC2540 by the acquisition module of fetus data, is realized the transmission of fetal monitoring data low-power consumption by wireless Bluetooth data transmission technology.
Ultrasound emission module of the present invention adopts doppler ultrasound transmitter module.The high-frequency signal of frequency 4M is produced by active crystal oscillator, high-frequency signal is loaded on programming device, that programming device generally adopts is CPLD or FPGA, such as altera corp MAX7000A chip, other CPLD or FPGA can also be selected in practical application, chip Main Function is that the 4MHZ high-frequency signal of input is produced the source of ultrasound signal being used for driving transducer by Programmable logical controller machine, exports anti-phase source of ultrasound signal 2MHZ_N and the 2MHZ_P of 2MHZ.Signal source, by CPLD programming Control, produces together the signal for demodulation with frequency homophase and time gated signal.
Due to the pulsed drive energy ability that exported by FPGA not enough, need through power amplification, pulse signal and time gated signal and restituted signal are added in power amplifier respectively, after power amplification, it exports and is respectively rp pulse signal CLK2MHZ_N and CLK2MHZ_P and restituted signal and gating signal, and rp pulse signal CLK2MHZ_N and CLK2MHZ_P is being loaded on transducer through booster circuit and match circuit.Such signal of telecommunication produces ultrasound wave through inverse piezoelectric effect.Ultrasonic emitting, when running into the heart of fetus generation Doppler effect of beating, the echo-signal of generation just there occurs frequency displacement.When transducer in accepting state time, returning the echo-signal of returning from heart of fetus because of Doppler effect there occurs
frequency displacement.Ultrasound echo signal through transducer piezoelectric effect produce frequency be 2MHZ
the signal of telecommunication, the frequency displacement signal of telecommunication producing frequency displacement carries out frequency-selecting through frequency-selective network, after the selective frequency amplifier circuit that signal forms via field effect transistor more repeatedly amplifies, output signal the useless noise of substantially filtering, again solution mediation filter and amplification is carried out to signal, obtain final Fetal Movement Signal HR, its frequency range is at 200HZ ~ 2KHZ.Be sent in CC2540 chip by main MCU serial ports after AD conversion, baud rate is 115200.
The mother and baby of a kind of low-power consumption of the present invention guards wireless Bluetooth data transmission technology, the communication of its main and subordinate node is mainly based upon on the basis of bluetooth protocol repertory, and bluetooth protocol repertory is by providing abundant interface function (API) as puppy parc interface function (GAP) and general-purpose attribute interface function (GATT) etc. for developer.The wireless transmit chip that the present invention adopts is the CC2540 low-power consumption Bluetooth chip of TI company, CC2540 transmit frequency band is 2.4G, carry enhancement mode 51 kernel and ADC peripheral hardware, therefore need not additional MCU peripheral hardware again, it is main outer is set to as chip provides the passive crystal oscillator of 32M and 32.768K of work and the antenna etc. of wireless transmit.CC2540 software development carries out application programming based on BLE software development kit, software development kit comprises five parts: operating system abstract layer (OSAL), hardware abstraction layer (HAL), BLE bluetooth protocol repertory, configuration file (Profiles), application layer (APP), as Fig. 4.Operating system abstract layer (OSAL) for bluetooth software exploitation provide general frame structure, wherein hardware abstraction layer (HAL), BLE bluetooth protocol repertory, configuration file (Profiles), application layer (APP) are all be based upon on this basis.Operating system abstract layer (OSAL) is not traditional operating system.It adopts Round Robin to judge whether, and event occurs.Operating system abstract layer (OSAL) is in initialization procedure, set up a timetable, and distribute a unique task identification number (TaskID) to each event, number corresponding unique event handling function of each task identification in event table.As Fig. 5, system electrification back operation system level of abstraction (OSAL) starts to carry out equipment and task initialization, judges whether have task in task list by polling mechanism, and task occurs then to call corresponding event handling function.OSAL initializes by calling initialization function osalInitTasks, and by giving the TaskID identification number that in task list, each task matching is unique, and its size determines the priority of task process.Whether system detects each task layer by constantly poll event and message, processes function accordingly if having just directly to call.
Connection between bluetooth slave mainly contains three important parameters, link time interval, from equipment wait for time delay, listen timeout.Link time interval is the request of setting up in broadcast channel of two equipment and the time of initiating to be connected, and the shortest is 7.5 milliseconds, is 4 seconds to the maximum; Wait for that time delay represents the number can skipping maximum connection events from equipment from equipment, herein can not more than 16 seconds; The connection maximum time interval of listen timeout master-slave equipment.Scope is 100 milliseconds to 32 seconds.After being initialized by configuration series of parameters, initiate broadcast from equipment, main equipment scans, and as Fig. 6, main equipment initiates request for building link, then connects, encrypts afterwards to host node again.
The exchanges data of slave is based on attribute protocol layer (ATT), general-purpose attribute configuration layer (GATT).From the angle of general-purpose attribute configuration layer, two bluetooth equipments are respectively client (Client) and server (Server), and client is the reading and writing data to service end, and service end is the request of customer in response end.Exchanges data and the maintenance of main and subordinate node are realized by attribute list, and service end and client create several attribute lists in gattprofile file, comprise several attributes (Characteristic) in each attribute list.Attribute is all made up of main service UUID, characteristic UUID, characteristic handle, characteristic value, and Fig. 7 is exactly the data structures of eigenvalue in GATT.Fig. 8 is exactly the exchange that slave realizes data, sends main service UUID after bluetooth connects, server response information on services, then transfer characteristic UUID, server response characteristic value handle,, find characteristic value by handle, thus reading and write diagnostics value realize exchanges data.
CC2540 is to after Fetal Movement Signal and uterine contraction pressure signal AD sampling, and be stored in property list by fetus data, client, by reading characteristic value, realizes the radio communication of data.
Claims (6)
1. the mother and baby of a low-power consumption guards wireless Bluetooth data transmission technology, it is characterized in that the fetus physiological parameter acquisition circuit comprising Fetal Heart Rate, fetal movement, uterine contraction pressure at least one, carrying out after ADC conversion by serial ports through master chip after wherein each fetus physiological parameter data carries out modulation treatment and carry out encapsulated delivery to transmitting chip CC2540 according to certain agreement, data unpack and send data to the cell-phone customer terminal with fetal monitoring by the CC2540 master chip based on bluetooth 4.0 under the condition of low-power consumption.
2. the mother and baby of a kind of low-power consumption according to claim 1 guards wireless Bluetooth data transmission technology, it is characterized in that above-mentioned fetal rhythm acquisition module produces pulsed drive ultrasonic transducer by pulse-generating circuit, and ultrasonic transducer is received and acoustic-electric conversion process ultrasonic echo by receiving circuit, signal after conversion through signal processing module solution mediation filtering, thus extracts the data aroused in interest of fetus.
3. the mother and baby of a kind of low-power consumption according to claim 1 guards wireless Bluetooth data transmission technology, it is characterized in that its data processing module to the data collected carry out amplification filtering process, related algorithm extraction and compression after be sent to wireless communication module.
4. its feature of data encapsulation of wireless blue tooth 4.0 protocol stack according to claim 1 is based on OSI(OpenSystemInterconnection at the layering thought with bluetooth 4.0 protocol stack) seven layer network models, the feature of combining wireless network realizes, it is physical layer (PHY) respectively from bottom to the superiors, link layer (LL), HPI controls (HCI), logic link control and self-adapted protocol (L2CAP), safety management (SM) and attribute agreement (ATT), general-purpose accessing configuration file (GAP) and general-purpose attribute configuration file (GATT) low-consumption wireless bluetooth 4.0 are divided into client (Client) and service end (Server), service end is to provide fetal monitoring data terminal, it by fetal monitoring Data visualization out, client is that Number of Foetus service end manifested by wireless network be it is found that and reads and writes, the exchanges data of client and service end is realized by attribute list, several attributes are comprised in each attribute list, and GATT layer defines the request of data of client and service end in bluetooth, find, read, with the subprocess of write attribute, characteristic value on GATT server and content thereof and configuration information are stored in attribute list, all fetal monitoring data manipulations all need to be undertaken by characteristic (Characteristic).
5. the mother and baby of a kind of low-power consumption according to claim 1 guards wireless Bluetooth data transmission technology, its low-power consumption is characterised in that wireless transmitter module master chip CC2540 built-in enhancement mode low-power consumption 8051 single-chip microcomputer of employing, its low power operation is enable by different operational modes, it mainly comprises aggressive mode, idle pulley, powering mode (PM1, PM2, PM3), quiescent dissipation is avoided by powered-down module, control gated clock is used to reduce dynamic power consumption, bluetooth 4.0 in the wake mode current power dissipation is 235uA, be 0.4uA under park mode, adopt low-consumption wireless bluetooth 4.0 both to reduce power consumption as wireless data transmission and also extend the monitoring time, wireless transmit electric current is maximum is 36mA, received current is 25mA, the most mental retardation of transmitting and receiving electric current reaches 17mA, compare other wireless transmit, power consumption reduces greatly, extend the service time of accumulator, facilitate and constantly can not need change battery because guarding for a long time.
6. the fetal monitoring probe designs of the transmission of the data based on low-consumption wireless bluetooth 4.0 according to claim 1, under it is characterized in that different transmitting powers, the distance of its transmission is also different, through surveying in effective transmitting power, its transmission range is 20 meters to about 30 meters, speed reaches 20Kbps to 30Kbps, therefore meets the requirement of fetal monitoring data transmission.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105699729A (en) * | 2016-04-19 | 2016-06-22 | 北京理工大学珠海学院 | Intelligent electricity acquisition system |
| CN106059635A (en) * | 2016-07-15 | 2016-10-26 | 北京海誉动想科技股份有限公司 | Bluetooth setting method and device for electronic equipment and Bluetooth connection method |
| CN106137255A (en) * | 2016-07-21 | 2016-11-23 | 深圳大学 | A kind of digital Doppler's fetal rhythm wireless probe based on bluetooth and detection method |
| CN108966195A (en) * | 2018-07-31 | 2018-12-07 | 深圳市信恳智能电子股份有限公司 | Wireless gyroscope software implementation method based on wechat small routine |
| CN109104668A (en) * | 2018-07-04 | 2018-12-28 | 柏塔科技（深圳）有限公司 | A method of reducing ultrasonic device power consumption |
| WO2019136809A1 (en) * | 2018-01-15 | 2019-07-18 | 深圳市沃特沃德股份有限公司 | Ble bluetooth-based led-lamp music rhythmic motion system, control method, and apparatus |
| CN111419225A (en) * | 2020-04-09 | 2020-07-17 | 北京品驰医疗设备有限公司 | Electroencephalogram acquisition system based on Bluetooth separated architecture |
| CN115153570A (en) * | 2022-06-22 | 2022-10-11 | 郑州大学第一附属医院 | Portable electrocardiogram monitoring device and system |
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- 2014-10-09 CN CN201410524071.1A patent/CN105476662A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699729A (en) * | 2016-04-19 | 2016-06-22 | 北京理工大学珠海学院 | Intelligent electricity acquisition system |
| CN106059635A (en) * | 2016-07-15 | 2016-10-26 | 北京海誉动想科技股份有限公司 | Bluetooth setting method and device for electronic equipment and Bluetooth connection method |
| CN106137255A (en) * | 2016-07-21 | 2016-11-23 | 深圳大学 | A kind of digital Doppler's fetal rhythm wireless probe based on bluetooth and detection method |
| WO2019136809A1 (en) * | 2018-01-15 | 2019-07-18 | 深圳市沃特沃德股份有限公司 | Ble bluetooth-based led-lamp music rhythmic motion system, control method, and apparatus |
| CN109104668A (en) * | 2018-07-04 | 2018-12-28 | 柏塔科技（深圳）有限公司 | A method of reducing ultrasonic device power consumption |
| CN109104668B (en) * | 2018-07-04 | 2020-06-30 | 柏塔科技（深圳）有限公司 | Method for reducing power consumption of ultrasonic equipment |
| CN108966195A (en) * | 2018-07-31 | 2018-12-07 | 深圳市信恳智能电子股份有限公司 | Wireless gyroscope software implementation method based on wechat small routine |
| CN111419225A (en) * | 2020-04-09 | 2020-07-17 | 北京品驰医疗设备有限公司 | Electroencephalogram acquisition system based on Bluetooth separated architecture |
| CN115153570A (en) * | 2022-06-22 | 2022-10-11 | 郑州大学第一附属医院 | Portable electrocardiogram monitoring device and system |
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Application publication date: 20160413 |