CN101352334A

CN101352334A - Embryo monitoring system and method based on wireless probe

Info

Publication number: CN101352334A
Application number: CNA2007100314348A
Authority: CN
Inventors: 黄志聪; 容敬波; 何振洲; 沈以鸿; 陆尧胜
Original assignee: 陆尧胜
Priority date: 2007-11-16
Filing date: 2007-11-16
Publication date: 2009-01-28

Abstract

The invention provides an embryo monitoring system based on a wireless probe, comprising a monitoring host machine and at least a wireless embryo monitoring probe and/or a wireless uterus pressing probe; wherein, each wireless embryo monitoring probe or the wireless uterus pressing probe carries out the modulation processing of collected signals and sends the signals to the monitoring host machine by a wireless transmission type; the monitoring host machine receives the data and carries out the digital signal filter wave and autocorrelation operation processing so as to gain the embryo psychological information and memory, display and/or print the information. As the embryo monitoring system smartly adopts a structure which combines the wireless communication technique with all monitoring probes which are charge for collecting the psychological data of the life characteristic of the embryo, the embryo signal collecting device is separated from the monitoring host machine, thus effectively ensuring pregnant woman not to be necessary to be restricted by the monitoring host machine; furthermore, owning to the wireless function extension, one monitoring instrument host machine can support the mixed accessing of multi-path wire/wireless probes, thus reducing the monitoring cost and improving the usage efficiency of the monitoring instrument.

Description

Fetal monitoring system and method based on wireless probe

Technical field

The present invention relates to medical instruments field, particularly relate to fetal monitoring system and method.

Background technology

Fetal monitoring (fetal surveillance) is to adopt biophysics and biochemical means, to the method that fetal in utero is grown and the safety situation is estimated.Fetal monitoring is the important means that ensures puerpera and fetal well-being, realization prenatal and postnatal care.Traditional fetal monitoring refer to more fetus electronic monitoring aroused in interest (Electronic FetalHeartRate Monitoring, EFM) and fetal rhythm uterine contraction monitoring (cardiotocography, CTG).Along with society improves day by day to baby's health and safety requirements, the physiology of fetal development and the research of pathology are become an important problem.But present fetal monitoring ubiquity problem:

At first, because period of pregnancy, the anemia of pregnant woman needed a kind of instrument that long-time monitoring and consulting can be provided, because the time is long, requirement can relatively be carried out in freedom, the comfortable environment at one, and this just proposes higher requirement to fetus matrix pressure monitoring device and method.In birth process, the line that leads that puerpera's motion, the variation of position will be pullled monitor device causes pressure transducer and puerpera's loose contact or produces position deviation, thereby the error of monitored parameters occurs especially.Simultaneously, various leads the puerpera twine on one's body brought very inconvenient and uncomfortable, when serious even have influence on puerpera's physiology and psychologic status.In long-time monitoring or water confinement, these shortcomings are especially obvious especially.Secondly, the fetal monitor that uses of hospital can only be monitored 1 patient for one because of the restriction of the connection cable that is subjected to popping one's head in now, causes shortcomings such as job costs height, occupation of land is many, efficient is low.

Summary of the invention

The objective of the invention is existence at the problems referred to above, provide a kind of utilize wireless communication transmission technique with fetus represent the physiological data signals of vital signs be wirelessly transmitted to the monitor device main frame, both guaranteed fully that pregnant and lying-in women are not subjected to cable restriction and can be free active, can effectively guarantee the reliability and the accuracy of each monitored parameters again, and make things convenient for medical personnel in time to carry out the wireless monitoring system and the method for clinical manipulation reliably.

The objective of the invention is to be achieved through the following technical solutions:

A kind of fetal monitoring system based on wireless probe, it is characterized in that comprising monitoring main frame and at least one Wireless Fetal monitoring probe and/or a wireless matrix pressure probe, wherein each Wireless Fetal monitoring probe or wireless matrix pressure probe are with the fetus that collects signal aroused in interest, signal is pressed in the palace, Fetal Movement Signal carries out sending to the monitoring main frame by Wireless transmission mode after the modulation treatment, and the monitoring main frame receives described fetus data aroused in interest, data are pressed in the palace, laggard line number word signal filtering of fetal movement data and auto-correlation computation processing obtain the fetus physiologic information and it are stored and shows and/or print.

Above-mentioned monitoring main frame comprises at least one wireless receiving module that connects in regular turn, digital signal processing module, main control module, display module, wherein each wireless receiving module is respectively with the fetus that receives data aroused in interest, data are pressed in the palace, the fetal movement data carry out obtaining corresponding fetus signal aroused in interest after data transaction and the data pretreatment, signal is pressed in the palace, Fetal Movement Signal, and with described each fetus signal aroused in interest, signal is pressed in the palace, Fetal Movement Signal outputs to digital signal processing circuit respectively and carries out A/D conversion and sampling, the Digital Signal Processing of digital signal filter and auto-correlation computation, main control module is connected with digital signal processing circuit by serial ports or SPI interface and reads fetus data aroused in interest from digital signal processing circuit, the palace is pressed data and fetal movement data and each data is stored, and each data is sent to display module shows, and control and coordinate the working method of each wireless receiving module and digital signal processing circuit.

Above-mentioned Wireless Fetal monitoring probe comprises the ultrasound emission module that connects to form in regular turn to one, ultrasonic transducer, ultrasonic demodulation module and wireless communication module, wherein, ultrasound emission module drive ultrasonic transducer generating ultrasound wave, and ultrasonic transducer receives ultrasound echo signal and ultrasound echo signal is carried out the acoustic-electric conversion process, the ultrasonic echo signal of telecommunication after ultrasonic transducer is handled is input to ultrasonic demodulation module and carries out demodulation process, extract fetus signal aroused in interest, the fetus of extraction signal aroused in interest is input to wireless communication module again and described fetus signal aroused in interest is transferred to the wireless receiving module of monitoring main frame by wireless communication module.

Above-mentioned wireless matrix pressure probe comprises pressure transducer, palace pressure signal processing circuit and the wireless communication module that connects to form in regular turn to one, wherein, pressure transducer is pressed conversion of signals to become the signal of telecommunication and this signal of telecommunication is outputed to the palace in the palace of anemia of pregnant woman's abdominal part and is pressed signal processing circuit, the wireless receiving module that the palace presses signal processing circuit that this signal of telecommunication is carried out being entered into wireless communication module after amplification filtering is handled and described palace piezoelectric signal is transferred to the monitoring main frame by wireless communication module.

At this moment, the structure of above-mentioned wireless communication module is formed varied, both can be that above-mentioned wireless communication module is a FM modulation transmissions module, above-mentioned fetus signal aroused in interest or palace press signal or Fetal Movement Signal to be transmitted to the radio receiver of fetal monitoring main frame after FM modulation transmissions module utilizes the FM modulation technique to carry out the FM modulation.Also can be that above-mentioned wireless communication module is the digital wireless communication transport module, this moment, above-mentioned fetus signal aroused in interest or palace press signal or Fetal Movement Signal to be transmitted to the radio receiver of fetal monitoring main frame by short-range communication transport module NFC or ZigBee communications module or Bluetooth communication transport module or other digital communication and transmission modules after the Digital Signal Processing of A/D conversion and compressed encoding.

Simultaneously, for further adapting to this not only safety of water confinement but also can alleviating the needs of the emerging childbirth technology of pregnant woman childbirth pain, above-mentioned Wireless Fetal monitoring probe or wireless matrix pressure probe also include sealed waterproof case respectively, and pressure transducer, the palace of ultrasound emission module, ultrasonic transducer, ultrasonic demodulation module and the wireless communication module of above-mentioned wireless fetal rhythm monitoring probe or wireless matrix pressure probe press signal processing circuit and the equal sealing device of wireless communication module in shell separately.

A kind of wireless fetus monitoring method based on wireless probe is characterized in may further comprise the steps:

(1), ultrasound emission module drive ultrasonic transducer generating and emission ultrasound wave;

(2), ultrasonic transducer receives corresponding ultrasound echo signal and ultrasound echo signal carried out acoustic-electric and be converted to the ultrasonic echo signal of telecommunication and this ultrasonic echo signal of telecommunication is outputed to ultrasonic demodulation module, pressure transducer converts pregnant and lying-in women's abdominal pressure to the signal of telecommunication and outputs to the palace and press signal processing circuit simultaneously;

(3), ultrasonic demodulation module carries out demodulation process to the ultrasonic echo signal of telecommunication and extracts and to obtain fetus signal aroused in interest and this fetus signal aroused in interest is outputed to wireless communication module, the palace presses signal processing circuit that the signal of telecommunication is carried out being sent to wireless communication module after amplification filtering is handled simultaneously;

(4), wireless communication module presses signal to carry out being transmitted to after the signal modulation process wireless receiving module of fetal monitoring main frame respectively in fetus signal aroused in interest and palace;

(5), wireless receiving module is pressed data, fetal movement data to carry out obtaining corresponding fetus signal aroused in interest, palace pressure signal, Fetal Movement Signal after data transaction and the data pretreatment in the fetus that receives data aroused in interest, palace, and is pressed signal, Fetal Movement Signal to output to digital signal processing circuit respectively in described each fetus signal aroused in interest, palace;

(6), digital signal processing circuit presses signal, Fetal Movement Signal to carry out the Digital Signal Processing of A/D conversion and sampling, digital signal filter and auto-correlation computation to above-mentioned each fetus signal aroused in interest, palace;

(7), main control module is connected with digital signal processing circuit by serial ports or SPI interface and reads fetus data aroused in interest, palace with digital signal processing circuit and press data and fetal movement data and each data is stored, and each data is sent to display module shows, and control and coordinate the working method of each wireless receiving module and digital signal processing circuit.

Wherein, the signal modulation process in the above-mentioned steps (4) both can be for having adopted the synthetic frequency modulation processing method of FM.Also can be that signal modulation process method in the above-mentioned steps (4) may further comprise the steps:

(4.1), earlier fetus signal aroused in interest or palace are pressed signal to carry out that A/D is converted to fetus digital information aroused in interest or digital information is pressed in the palace;

(4.2), press digital information to carry out the Digital Signal Processing of compressed encoding by MCU or DSP above-mentioned fetus information aroused in interest or palace;

(4.3), the information aroused in interest of the fetus behind the compressed coding or palace are pressed digital information be transmitted to the radio receiver of fetal monitoring main frame by short-range communication transport module NFC or ZigBee communications module or Bluetooth communication transport module or other digital communication and transmission modules.

The present invention is owing to adopt dexterously each monitoring of the collection of wireless communication technology and responsible fetus vital signs physiological data popped one's head in and be integrated as the structure of one, fetus signal pickup assembly and monitoring main frame are separated, thereby effectively guarantee pregnant and lying-in women's constraint of tutelage main frame again, can freedom carry out activity easily, both alleviated psychological burden, effectively improve pregnant and lying-in women's physiology and psychologic status, can fully guarantee the reliability and the accuracy of each monitored parameters again, and make things convenient for medical personnel in time to carry out clinical manipulation reliably widely.And expand by radio function, making a monitor main frame can support multiple wireless/wired probe to mix inserts, guarantee that effectively a monitor can receive a plurality of pregnant and lying-in women's fetus physiological signal simultaneously, big and anemia of pregnant woman such as is difficult to move at problem to the medical science space requirement to anemia of pregnant woman's constraint, instrument not only to have solved wired fetal monitoring probe line, reduced the monitoring cost simultaneously, improved the service efficiency of monitor, be applicable to antenatal, just before giving birth reach the continuous fetal monitoring of stages of labor.Especially, the sealed waterproof case structure that each wireless probe adopts makes the present invention can adapt to this not only safety of water confinement easily but also can alleviate the needs of the emerging childbirth technology of pregnant woman childbirth pain, has further enlarged range of application of the present invention.

Describe realization of the present invention and work process in detail below in conjunction with accompanying drawing:

Description of drawings

Fig. 1 is a Wireless Fetal monitor system structured flowchart of the present invention;

Fig. 2 is that ultrasonic pulse of the present invention produces circuit theory diagrams;

Fig. 3 is a ultrasound-driven circuit of the present invention;

Fig. 4 is a ultrasound echo signal selective frequency amplifier circuit schematic diagram of the present invention;

Fig. 5 is ultrasonic signal demodulation of the present invention, filter amplification circuit schematic diagram;

Fig. 6 is the FM radio receiving transmitting module circuit based on upc1651 of the present invention;

Fig. 7 is the remote FM radio receiving transmitting module circuit based on discrete component of the present invention;

Fig. 8 is a nRF24E1 wireless transceiver circuit of the present invention;

Fig. 9 is a MC13192 wireless transceiver circuit of the present invention;

Figure 10 is the interface circuit of C8051F020 of the present invention and MC13192;

Figure 11 is the interface circuit of ADuC812 of the present invention and ROK101008;

Figure 12 is a wireless probe charging circuit of the present invention;

Figure 13 is a LCD interface circuit of the present invention;

Figure 14 is the loam cake of waterproof case of the present invention;

Figure 15 is the lower cover of waterproof case of the present invention;

Figure 16 is the battery compartment of waterproof case of the present invention;

Figure 17 is the battery cover of waterproof case of the present invention;

Figure 18 is the outside drawing of wireless fetal rhythm monitoring device of the present invention;

Figure 19 is the use sketch map of wireless fetal rhythm monitoring device.

Figure 20 is a Wireless Fetal monitor theory diagram of the present invention;

Figure 21 is a wireless receiving module structured flowchart of the present invention

Figure 22 is a signal pre-processing circuit schematic diagram of the present invention;

Figure 23 is the circuit theory diagrams of digital signal processing module of the present invention;

Figure 24 is the theory diagram of main control module of the present invention;

Figure 25 is the schematic diagram of LCD MODULE interface of the present invention;

Figure 26 is the hardware line sketch map of ADS7843 touch screen controller of the present invention and XScale microprocessor

Figure 27 is a print module theory diagram of the present invention;

The specific embodiment

Fetal monitoring system based on wireless probe of the present invention, comprise monitoring main frame and at least one Wireless Fetal monitoring probe and/or a wireless matrix pressure probe, wherein each Wireless Fetal monitoring probe or wireless matrix pressure probe are with the fetus that collects signal aroused in interest, signal is pressed in the palace, Fetal Movement Signal carries out sending to the monitoring main frame by Wireless transmission mode after the modulation treatment, and the monitoring main frame receives described fetus data aroused in interest, data are pressed in the palace, laggard line number word signal filtering of fetal movement data and auto-correlation computation processing obtain the fetus physiologic information and it are stored and shows and/or print.

Wherein above-mentioned monitoring main frame comprises at least one wireless receiving module that connects in regular turn, digital signal processing module, main control module, display module, wherein each wireless receiving module is respectively with the fetus that receives data aroused in interest, data are pressed in the palace, the fetal movement data carry out obtaining corresponding fetus signal aroused in interest after data transaction and the data pretreatment, signal is pressed in the palace, Fetal Movement Signal, and with described each fetus signal aroused in interest, signal is pressed in the palace, Fetal Movement Signal outputs to digital signal processing circuit respectively and carries out A/D conversion and sampling, the Digital Signal Processing of digital signal filter and auto-correlation computation, main control module is connected with digital signal processing circuit by serial ports or SPI interface and reads fetus data aroused in interest from digital signal processing circuit, the palace is pressed data and fetal movement data and each data is stored, and each data is sent to display module shows, and control and coordinate the working method of each wireless receiving module and digital signal processing circuit.Above-mentioned Wireless Fetal monitoring probe comprises the ultrasound emission module that connects to form in regular turn to one, ultrasonic transducer, ultrasonic demodulation module and wireless communication module, wherein, ultrasound emission module drive ultrasonic transducer generating ultrasound wave, and ultrasonic transducer receives ultrasound echo signal and ultrasound echo signal is carried out the acoustic-electric conversion process, the ultrasonic echo signal of telecommunication after ultrasonic transducer is handled is input to ultrasonic demodulation module and carries out demodulation process, extract fetus signal aroused in interest, the fetus of extraction signal aroused in interest is input to wireless communication module again and described fetus signal aroused in interest is transferred to the wireless receiving module of monitoring main frame by wireless communication module.Above-mentioned wireless matrix pressure probe comprises pressure transducer, palace pressure signal processing circuit and the wireless communication module that connects to form in regular turn to one, wherein, pressure transducer is pressed conversion of signals to become the signal of telecommunication and this signal of telecommunication is outputed to the palace in the palace of anemia of pregnant woman's abdominal part and is pressed signal processing circuit, the wireless receiving module that the palace presses signal processing circuit that this signal of telecommunication is carried out being entered into wireless communication module after amplification filtering is handled and described palace piezoelectric signal is transferred to the monitoring main frame by wireless communication module.

This moment, above-mentioned wireless communication module was a FM modulation transmissions module, and above-mentioned fetus signal aroused in interest or palace press signal or Fetal Movement Signal to be transmitted to the wireless receiving module of monitoring main frame after FM modulation transmissions module utilizes the FM modulation technique to carry out the FM modulation.Above-mentioned wireless communication module is the digital wireless communication transport module, and wherein above-mentioned fetus signal aroused in interest or palace press signal or Fetal Movement Signal to be transmitted to the wireless receiving module of guarding main frame by short-range communication transport module NFC or ZigBee communications module or Bluetooth communication transport module or other digital communication and transmission modules after the Digital Signal Processing of A/D conversion and compressed encoding.Above-mentioned wireless fetal rhythm monitoring probe and wireless matrix pressure probe also include power supply and LCD MODULE, wherein said electric supply installation respectively with the ultrasound emission module of wireless fetal rhythm monitoring probe, ultrasonic transducer, ultrasonic demodulation module, wireless communication module connect or respectively with the pressure transducer of wireless matrix pressure probe, signal processing circuit is pressed in the palace, wireless communication module also is respectively it power supply is provided, and described LCD MODULE is connected and can demonstrates the electric weight of power supply with power supply and each wireless communication module, the communications status of wireless communication module, sequence number sign or other status indicators.Above-mentioned wireless fetal rhythm monitoring probe or wireless matrix pressure probe also include sealed waterproof case respectively, and pressure transducer, the palace of ultrasound emission module, ultrasonic transducer, ultrasonic demodulation module and the wireless communication module of above-mentioned wireless fetal rhythm monitoring probe or wireless matrix pressure probe press signal processing circuit and the equal sealing device of wireless communication module in shell separately.

Below specifically implement and work process in the detailed realization of detailed description each several part of the present invention:

One, the concrete enforcement of wireless fetal rhythm monitoring probe:

Above-mentioned ultrasound emission module adopts the doppler ultrasound radiating circuit, described doppler ultrasound circuit as shown in Figure 2 at this moment, obtain ultrasonic signal, source of ultrasound signal and ultrasound-driven circuit must be arranged, as shown in Figure 2, X1 is active crystal oscillator, be used to produce the high-frequency signal that frequency is 4M, U5 is a PLD, the present invention adopts the chip I SP4032 of Lattice company, also can select the CPLD or the FPGA of other model in the practical application for use, XC9500XL 3.3V series as Xilinx company, MAX 7000 series of altera corp or the like, its effect is to produce the source of ultrasound signal that is used to drive ultrasonic sensor, the anti-phase source of ultrasound signal of the 47 and 48 feet output 2MHz of U5; Signal source is by the programme-control of CPLD chip internal, repetition rate (PRF) transmitted pulse bundle with 3KHz, each pulsed beams is the ultrasonic pulse bundle of the 2MHz of 50uS, produces and transmit at the 2nd foot simultaneously to be used for the reference signal of demodulation with the frequency homophase, in the 3rd foot generation time gating signal.

The impulse ultrasound signal, boosts by field effect transistor Q2, Q3 driving transformer to increase driving force then through the phase inverter of U6, through the driving signal of telecommunication after boosting, be added on the piezoelectric ultrasonic transducer, the signal of telecommunication is converted into ultrasonic signal, as shown in Figure 3.Ultrasonic transducer of the present invention adopts impulse ultrasound Doppler's ultrasonic transducer, its be transmitting transducer also be receiving transducer, at intermittence of transmitted pulse ultrasonic beam not is exactly the time that transducer receives ultrasound echo signal, in this period, the ultrasonic signal that reflects from heart of fetus takes place ± Δ f frequency displacement, the ultrasound wave that reflects carries out the acoustic-electric conversion through ultrasonic transducer, be converted into the signal of telecommunication of 2MHz ± Δ f, certainly the fundamental frequency of the relative 2MHz of frequency displacement of Δ f is a very little variable, so the mid frequency f0 that our frequency-selecting is amplified still is selected in 2MHz; As Fig. 4, f0 ± Δ f imports from sonac, and the series connection selecting frequency filtering network through being made up of L1, C1, C2 carries out preliminary frequency-selective filtering, and tunable capacitor C1 can finely tune the center frequency point of frequency-selective filtering, and the resonance point that makes frequency-selective network is 2MHz.Q1 is low noise preposition amplification field effect transistor, constitutes preposition frequency-selecting by Q1, L2, C5, W1, R3, C3 and amplifies network, and further frequency-selecting is amplified to the echo-signal of carrying out preliminary frequency-selective filtering; This high-frequency amplifier circuit has very good selecting frequency characteristic, amplifies through three frequency-selectings, at the signal of telecommunication elimination useless noise substantially signal of TP2 output.

It is the high-frequency signal of f0 ± Δ f frequency range through high frequency frequency-selecting amplifying signal that ultrasonic demodulation module of the present invention adopts ultrasonic signal demodulation, filter amplification circuit structure combining, and the signal that really needs is the frequency shift signal Δ f that comprises movable information, so Δ f need be come out from the high-frequency signal demodulation.As Fig. 5, U5 is an analog switch, and the high-frequency signal of f0 ± Δ f frequency range is from the 1 pin input of U1, and B is the reference signal that is used for demodulation with the same homophase frequently that transmits, and C is time gated signal, is used to shield the unwanted echo signal of the non-detection degree of depth.Through the phase demodulation of U5, low frequency signal Δ f is come out by demodulation.Band filter through being made up of U1A, U1B, U4A, U4B and other resistance capacitance has obtained final fetus signal aroused in interest again, and its frequency range is handled emission to this signal at last between 200Hz～2KHz.

The wireless communication module of fetus signal aroused in interest

The present invention is to use wireless communication technology transmission fetus information aroused in interest.Fetus signal frequency range aroused in interest after ultrasonic transducer and ultrasound emission module, ultrasonic demodulation module obtain and handle is 200Hz～2KHz, the structure of its described wireless communication module of the present invention is formed varied, both can be that above-mentioned wireless communication module is a FM modulation transmissions module, above-mentioned fetus signal aroused in interest be transmitted to the radio receiver of fetal monitoring main frame after FM modulation transmissions module utilizes the FM modulation technique to carry out the FM modulation.Also can be that above-mentioned wireless communication module is the digital wireless communication transport module, this moment, above-mentioned fetus signal aroused in interest be transmitted to the radio receiver of fetal monitoring main frame by short-range communication transport module NFC or ZigBee communications module or Bluetooth communication transport module or other digital communication and transmission modules after the Digital Signal Processing of A/D conversion and compressed encoding.Below describe the concrete composition and the enforcement of each wireless transmission scheme in detail:

Radio receiving transmitting module based on the FM frequency modulation technology

1, based on the FM radio receiving transmitting module of upc1651

As shown in Figure 6, this module adopts the upc1651 integrated circuit of Japanese NEC Corporation production as main devices, fetus signal aroused in interest inputs to upc1651 through C1 after straight and carries out frequency modulation(PFM), can reach the purpose of regulating tranmitting frequency by the size of regulating L1 or C3.This circuit gain height, working stability, thus guaranteed the high-quality of signal.Form the effective transmitting range of FM modulating emission circuit greater than 30 meters with it.

2, based on the remote FM radio receiving transmitting module of discrete component

As shown in Figure 7, this module uses discrete component to constitute a high-power FM wireless fetal rhythm signal transmission module.Q2 carries out frequency modulation(PFM) to the fetus signal aroused in interest after amplifying through Q1, can reach the purpose of regulating tranmitting frequency by the size of regulating L1 or C4.Increase high frequency buffer and an audio frequency amplifier of a 10dB in this circuit, can reach 700 meters transmission range in theory.

Radio receiving transmitting module based on the digital wireless communication technology

1, based on the radio receiving transmitting module of NFC technology

In the chip based on the NFC technology, more typically be exactly the nRF24e1 that Nordic company produces, it works in the open frequency range in the 2.4GHz whole world, adopts the 0.18um technological design, embedded enhancement mode 51 kernels of chip, ADC and other peripheral hardwares have high integration and the cost advantage that has competitiveness; Built in hardware CRC error detection circuit and multiple access communication control reduce software overhead.

Because nRF24E1 carries peripheral hardwares such as 51 kernels and ADC, so needn't add the MCU chip again, can utilize 51 embedded kernels to realize other required function.The radio receiving transmitting module circuit part is made up of 2.4G radio transmitting and receiving chip nRF24E1 and peripheral circuit among the present invention.Main peripheral components comprises: be used to deposit program code serial EEPROM, be used to preserve the monobus EEPROM DS2430A of sub-plane No., provide the passive crystal oscillator of work clock and radio-frequency antenna circuit etc. for chip.

As shown in Figure 8, U2 is the EEPROM of SPI interface, is used to deposit the required program code of nRF24E1 operation.Because nRF24E1 itself provides a SPI Master Interface, so U2 is directly received on the SPI Master Interface of nRF24E1.When the nRF24E1 electrifying startup, fetch program operation from U2 automatically; U6 is the 256Bit EEROM of DALLAS company based on the 1-wire bus, is used for the plane No. of storage device, information such as emission frequency.Content by software modification EEROM can reach the purpose of revising the emission frequency.

The ADC that fetus signal aroused in interest carries through nRF24E1 sample laggard line number word processing and protocol encapsulation are launched fetus signal aroused in interest through the wireless transmit/receive units of nRF24E1 again.

2, based on the radio receiving transmitting module of ZigBee technology

Chip based on the ZigBee technology has a lot, as CC2420, CC2430, MC13192, MC13193 or the like.MC13192 of the present invention is as radio transmitting and receiving chip, the working band of this chip is 2.4G, message transmission rate is 250Kbps, this chip only needs few peripheral components, can constitute transmission circuit, its peripheral circuit comprises power supply power supply, crystal oscillator clock circuit etc., and its typical match circuit figure as shown in Figure 9, PAO+, PA0-pin are the radio-frequency transmissions end, and RFIN-, RFIN+ pin are rf inputs.

Because this chip does not have embedded controller, so must add outer MCU interface circuit.The MUC chip can use the low-power consumption chip that has the ADC peripheral hardware, as: C8051F series, MSP430F series, ATmega series or the like chip, the present invention uses C8051F020, and its interface circuit is as shown in figure 10.C8051F020 controls MC13192 by spi bus, comprises read-write to depositor etc.In addition, MC13192 initiatively sends out and receives interrupt signal and tell the C8051F020 radio frequency chip that event occurs, and C8051F020 is by the resetting of IO mouth control MC13192, mode of operation switching etc.

Fetus signal aroused in interest must carry out A/D sampling and digital processing earlier, carries out emission control then, and the signal after handling is launched.Also include A/D sampling and Digital Signal Processing, A/D sample mode this moment in the described wireless communication module

Because the fetus signal aroused in interest that captures mainly drops in the audiorange of 200Hz～2KHz, on the coding of voice data, the PCM sign indicating number that this module has been selected the most simply, has been easy to realize, this coding is exactly directly audio signal to be sampled and quantize, the speed of use 〉=8kHz is sampled, quantified precision 〉=8bits, the data transfer rate 〉=64kbps of generation.Its coding biggest advantage is exactly that tonequality is good, and what difference the fetus of reconstruct signal aroused in interest does not almost have with primary fetus signal aroused in interest.A/D sampling can be selected independent A/D conversion chip for use, or the MCU that has an A/D translation function carries out.

Digital Signal Processing

Digital signal after using microprocessor to the A/D sampling is handled.At first microprocessor carries out the digital filtering processing to signal, is packaged into then to be fit to the wireless transmission data packet format, and packet header is superimposed with the plane No. and the condition code of probe self, and the bag tail adds the CRC redundancy check, gives radio receiving transmitting module at last and carries out wireless transmission.

3, based on the radio receiving transmitting module of Bluetooth technology

In Bluetooth technology is used, mainly contain two kinds of forms of bluetooth chipset and bluetooth module: bluetooth chipset comprises several chip blocks such as Flash of Bluetooth RF module, bluetooth baseband chip, storage Firmware, finishes the radio communication and the link management function of bluetooth jointly; Bluetooth module has been integrated into radio frequency, base band, link manager and HCI layer on the chip piece, realize HCI (host controller interface) instruction interface by EBIs such as RS-232, USB, thereby on using, bluetooth module is more more convenient than bluetooth chipset, the present invention is that example designs radio receiving transmitting module with bluetooth module ROK101008, can use other module or chip in the practical application, as ROK101008, ROK104001, RF1968, TR0700 or the like.

ROK101008 comprises three major parts: baseband controller, Flash (including firmware) and radio frequency part, support UART, PCM and three kinds of interface shapes of I2C, and adopt inner crystal oscillator and clock, working frequency range is 2.4G.Because the various peripheral circuits of ROK101008 have been integrated in a module, so very easy to use, as long as connect antenna, power supply, but operate as normal then, be the interface schema of this module and one chip data acquisition chip ADuC812 as shown in figure 11, both pass through serial communication.

Fetus signal aroused in interest must carry out A/D sampling and digital processing through ADuC812 earlier, sends bluetooth module to by serial ports then and launches.Because serial ports speed is limited, so fetus signal aroused in interest must be earlier through the digital compression coding.

Power supply

For portable set, Wireless Fetal monitor device of the present invention also includes power supply and LCD MODULE, wherein said electric supply installation respectively with ultrasound emission module, ultrasonic transducer, ultrasonic demodulation module, wireless communication module is connected and be respectively it that power supply is provided, described LCD MODULE is connected and can demonstrates the electric weight of power supply, communications status, sequence number sign or other status indicators of wireless communication module with power supply and wireless communication module.The design of power pack is very important.Consider the versatility and the service life of power supply, but the rechargeable type lithium battery of employing repeated multiple times of the present invention charging is as power supply.This moment described power supply circuit part by electric power starting circuits for triggering, power control circuit, and lithium cell charging circuit etc. constitute.The lithium cell charging chip is selected the LTC-4054 of LINEAR company for use.LTC-4054 is a complete single-unit lithium battery with the linear charger of constant current/constant voltage, its charging control circuit as shown in figure 12, charge power supply is by foot 4 inputs, the specific electric weight of foot 3 outputs is given lithium cell charging.Frequently give lithium ion cell charging in order to forbid charging chip, open battery charging functions by foot 5 when being lower than certain threshold value, and the charged state pin CHR of MCU by charging chip judges whether battery is full of just MCU detects cell voltage.

LCD MODULE

The operator is to the use of this device for convenience, and the present invention adopts LCD to show battery electric quantity, handset sequence number and sign, information such as communications status.Figure 13 is the interface and the time sequential routine figure of liquid crystal display.MCU writes displaying contents by 4 holding wires to LCD.

Waterproof case

Water confinement is a kind of not only safety but also the emerging childbirth technology that can alleviate pregnant woman childbirth pain, it require monitor device can be in water operate as normal.In order to satisfy the function of waterproof, can be convenient to again produce and install and user's use, Wireless Fetal monitor device of the present invention also includes sealed waterproof case, above-mentioned ultrasound emission module, ultrasonic transducer, ultrasonic demodulation module and the equal sealing device of wireless communication module are in this shell, this moment, this shell adopted double color mould (extra quality mould) injection molding technology, and material is respectively ABS and TPE.Shell divides loam cake and lower cover, on be stamped a battery compartment of laying battery.Loam cake and lower cover carry out combination and fixing by the mode of tightening up a screw, the inner circuit module of placing.

Waterproof construction

In order to guarantee that liquid that can not enters internal circuit, must there be good compactness in the bonded place of upper and lower covers.The edge of loam cake adopts the harder ABS boss of material among the design, as Figure 14.The corresponding position of lower cover then embeds thermoplastic elastomer (TPE) (TPE) in ABS, as Figure 15.When upper and lower covers in conjunction with the time, the ABS boss of loam cake has compressed the TPE material of lower cover equably, has guaranteed the requirement of fine and close waterproof.Outer casing upper cover has a battery compartment simultaneously, is used to be placed as the battery of wireless fetal rhythm monitoring device power supply.In order to prevent that liquid from entering battery compartment, the battery Hatch Opening stays a circle groove, as Figure 16.Battery cover uses the double color mould technology, embeds the TPE boss on ABS, as Figure 17, thereby has guaranteed the sealing of battery compartment, satisfies the requirement of waterproof.

Wireless fetal rhythm monitoring device is in anemia of pregnant woman's fixed form on one's body

This wireless fetal rhythm monitoring device can use special-purpose waterproof bandage or medical proof fabric to be fixed on the anemia of pregnant woman's. on one's body.Convenient and swift in order to ensure clinical manipulation has a bandage button (Figure 18) on the shell, leave several knob doors on bandage or the adhesive plaster.Determined the position of device as the monitoring personnel after, bandage (or adhesive plaster) is buckled on the device, is fixed on one's body the anemia of pregnant woman then.The fixed form of use button is easier to be easier, fixing more reliable accurate than using traditional alligator clamp operation.Figure 19 is the use sketch map of wireless fetal rhythm monitoring device.

The work process of wireless fetal rhythm monitoring device is as follows:

This device places on anemia of pregnant woman's the abdominal part when using, ultrasound emission circuit excitation ultrasonic transducer ultrasonic emitting to the heart of fetus, ultrasound wave that heart of fetus reflects is through receiving and demodulation, utilizes doppler principle to extract the active signal of heart of fetus and carries out Filtering Processing.Fetus after processing signal aroused in interest sends receiver module to through wireless transport module, thereby realizes the wireless monitoring of fetus signal aroused in interest.

Wireless module can be FM modulation module or digital wireless communication module (as NFC, ZIGBEE or bluetooth etc.).When using the transmission of digital wireless communication module, earlier fetus signal aroused in interest is carried out the A/D conversion, use MCU to carry out the monitoring and the setting of Digital Signal Processing and various states then.Meanwhile use liquid crystal display screen that various states are shown, so that in time understand the working condition of device when using.

Owing to used wireless communication technology, removed the constraint of lead to the anemia of pregnant woman, so as long as wireless fetal rhythm monitoring device is fixed on the anemia of pregnant woman just can carry out fetal monitoring on one's body, thereby, made things convenient for medical personnel's clinical manipulation simultaneously for the anemia of pregnant woman provides free comfortable protected environment.

This device has adopted the waterproof construction design, by using double color mould (extra quality mould) injection molding technology, has guaranteed the compactness of shell junction, thus the monitoring requirement when satisfying water confinement.

Two, the concrete enforcement of wireless matrix pressure probe:

The wireless communication module of signal is pressed in the palace

The present invention is to use wireless communication technology transmission palace to press information.Pressing the abdominal part palace pressure signal after signal processing circuit is obtained and handled through pressure transducer, palace is a level signal that slowly changes, the structure of its described wireless communication module of the present invention is formed varied, both can be that above-mentioned wireless communication module is a FM modulation transmissions module, above-mentioned palace piezoelectric signal be transmitted to the radio receiver of fetal monitoring main frame after FM modulation transmissions module utilizes the FM modulation technique to carry out the FM modulation.Also can be that above-mentioned wireless communication module is the digital wireless communication transport module, this moment, above-mentioned palace piezoelectric signal be transmitted to the radio receiver of fetal monitoring main frame by short-range communication transport module NFC or ZigBee communications module or Bluetooth communication transport module or other digital communication and transmission modules after the Digital Signal Processing of A/D conversion and compressed encoding.Below describe the concrete composition and the enforcement of each wireless transmission scheme in detail:

1, based on the FM radio receiving transmitting module of upc1651

As shown in Figure 6, this module adopts the upc1651 integrated circuit of Japanese NEC Corporation production as main devices, pregnant and lying-in women's abdominal part palace presses signal to input to upc1651 through C1 after straight to carry out frequency modulation(PFM), can reach the purpose of regulating tranmitting frequency by the size of regulating L1 or C3.This circuit gain height, working stability, thus guaranteed the high-quality of signal.Form the effective transmitting range of FM modulating emission circuit greater than 30 meters with it.

As shown in Figure 7, this module uses discrete component to constitute a high-power FM wireless matrix pressure signal transmission module.Q2 presses signal to carry out frequency modulation(PFM) to the pregnant and lying-in women's abdominal part palace after amplifying through Q1, can reach the purpose of regulating tranmitting frequency by the size of regulating L1 or C4.Increase high frequency buffer and an audio frequency amplifier of a 10dB in this circuit, can reach 700 meters transmission range in theory.

1, based on the radio receiving transmitting module of NFC technology

The ADC that the abdominal part palace presses signal to carry through nRF24E1 sample laggard line number word processing and protocol encapsulation press the abdominal part palace signal to launch through the wireless transmit/receive units of nRF24E1 again.

2, based on the radio receiving transmitting module of ZigBee technology

Because this chip does not have embedded controller, so must add outer MCU interface circuit.The MUC chip can use the low-power consumption chip that has the ADC peripheral hardware, as: C8051F series, MSP430F series, ATmega series or the like chip, the present invention uses C8051F020, and its interface circuit is as shown in figure 10.C8051F020 controls MC13192 by spi bus, comprises read-write to depositor etc.In addition, MC13192 initiatively sends out and receives interrupt signal and tell the C8051F020 radio frequency chip that event occurs, and C8051F020 is by the resetting of IO mouth control MC13192, mode of operation switching etc.At this moment

The abdominal part palace presses signal must carry out A/D sampling and digital processing earlier, carries out emission control then, and the signal after handling is launched.Also include A/D sampling and Digital Signal Processing this moment in the described wireless communication module, the A/D sampling can be selected independent A/D conversion chip for use, or the MCU that has an A/D translation function carries out.Digital signal after using microprocessor MCU to the A/D sampling is handled.At first microprocessor carries out digital smoothness filtering and digital coding processing to signal, be packaged into then and be fit to the wireless transmission data packet format, packet header is superimposed with sequence number and the condition code that supervising device self is pressed in the palace, and the bag tail adds the CRC redundancy check, gives radio receiving transmitting module at last and carries out wireless transmission.

3, based on the radio receiving transmitting module of Bluetooth technology

The abdominal part palace presses signal to carry out A/D sampling and digital processing through ADuC812 earlier, sends bluetooth module to by serial ports then and launches.Because serial ports speed is limited, so signal process digital compression coding is earlier pressed in the abdominal part palace.

Power supply

For portable set, wireless matrix pressure monitoring device of the present invention also includes power supply and LCD MODULE, wherein said electric supply installation is pressed signal processing circuit with pressure transducer, palace respectively, wireless communication module is connected and be respectively it provides power supply, and described LCD MODULE is connected and can demonstrates the electric weight of power supply, communications status, sequence number sign or other status indicators of wireless communication module with power supply and wireless communication module.The design of power pack is very important.Consider the versatility and the service life of power supply, but the rechargeable type lithium battery of employing repeated multiple times of the present invention charging is as power supply.This moment described power supply circuit part by electric power starting circuits for triggering, power control circuit, and lithium cell charging circuit etc. constitute.The lithium cell charging chip is selected the LTC-4054 of LINEAR company for use.LTC-4054 is a complete single-unit lithium battery with the linear charger of constant current/constant voltage, its charging control circuit as shown in figure 12, charge power supply is by foot 4 inputs, the specific electric weight of foot 3 outputs is given lithium cell charging.Frequently give lithium ion cell charging in order to forbid charging chip, open battery charging functions by foot 5 when being lower than certain threshold value, and the charged state pin CHR of MCU by charging chip judges whether battery is full of just MCU detects cell voltage.

LCD MODULE

Waterproof case

Water confinement is a kind of not only safety but also the emerging childbirth technology that can alleviate pregnant woman childbirth pain, it require monitor device can be in water operate as normal.In order to satisfy the function of waterproof, can be convenient to again produce and install and user's use, wireless matrix pressure monitoring device of the present invention also includes sealed waterproof case, above-mentioned pressure transducer, palace press signal processing circuit and the equal sealing device of wireless communication module in this shell, this moment, this shell adopted double color mould (extra quality mould) injection molding technology, and material is respectively ABS and TPE.Shell divides loam cake and lower cover, on be stamped a battery compartment of laying battery.Loam cake and lower cover carry out combination and fixing by the mode of tightening up a screw, the inner circuit module of placing.

Waterproof construction

Wireless matrix pressure monitoring device is in anemia of pregnant woman's fixed form on one's body

This wireless matrix pressure monitoring device can use on the body that special-purpose waterproof bandage or medical proof fabric be fixed on the anemia of pregnant woman.Convenient and swift in order to ensure clinical manipulation has a bandage button (Figure 18) on the shell, leave several knob doors on bandage or the adhesive plaster.Determined the position of device as the monitoring personnel after, bandage (or adhesive plaster) is buckled on the device, is fixed on one's body the anemia of pregnant woman then.The fixed form of use button is easier to be easier, fixing more reliable accurate than using traditional alligator clamp operation.Figure 19 is the use sketch map of wireless matrix pressure monitoring device.

The work process of wireless matrix pressure monitoring device is as follows:

This device is that pressure transducer is placed on anemia of pregnant woman's the abdominal part when using, with to press conversion of signals be the signal of telecommunication in anemia of pregnant woman's abdominal part palace and carry out amplification filtering and handle.Anemia of pregnant woman's abdominal part palace after the processing presses signal to send receiver module to through wireless transport module, thereby realizes the wireless monitoring that press in the anemia of pregnant woman palace.

Wireless module can be FM modulation module or digital wireless communication module (as NFC, ZIGBEE or bluetooth etc.).When using the transmission of digital wireless communication module, press anemia of pregnant woman's abdominal part palace signal to carry out the A/D conversion earlier, use MCU to carry out the monitoring and the setting of Digital Signal Processing and various states then, meanwhile use liquid crystal display screen that various states are shown.

Owing to used wireless communication technology, removed the constraint of lead to the anemia of pregnant woman, so as long as wireless matrix pressure monitoring device is fixed on the anemia of pregnant woman just can carry out fetal monitoring on one's body, thereby, made things convenient for medical personnel's clinical manipulation simultaneously for the anemia of pregnant woman provides free comfortable protected environment.

Three, the concrete enforcement of monitoring main frame:

The Wireless Fetal monitor is made up of wireless data transceiver module, signal pre-processing circuit, digital signal processing module, main control module, man-machine interface circuit, display module, print module etc., and structured flowchart as shown in figure 20.

1, wireless data transceiver module

Wireless data transceiver module is used for receiving the data that Wireless Fetal monitoring probe sends, comprise fetus signal aroused in interest, palace pressure signal, Fetal Movement Signal, the radio transmitting and receiving chip of this module must match mutually with the transceiver module of wireless probe, in order to allow system can adopt different wireless modules, adopt the method for card insert type to realize, make system more flexible, when needs different radio module, as long as change this wireless data transceiving card, other module of system need not to make any change.Its block diagram as shown in figure 21.

Wireless data transceiver module also can be assembled into one separately and receive pedestal, be connected with traditional (not possessing the wireless receiving function) fetal monitor by cable, realize the access of wireless monitoring probe, thereby provide a perfect expansion scheme for the existing fetal monitor of hospital.

A monitor main frame can insert and handle a plurality of wireless modules simultaneously, therefore can satisfy a monitor carries out real-time monitoring simultaneously to a plurality of anemia of pregnant woman requirement.

Wireless data transceiver module can use FM modulation system or digital wireless communication technology (NFC, Zigbee or bluetooth etc.) to realize.Concrete enforcement circuit is existing the argumentation in the embodiment that above the Wireless Fetal monitoring is popped one's head in.

2, signal pre-processing circuit

After the data that wireless module receives, also have more clutter, need further to handle, as shown in figure 22, the circuit that U5A and other resistance capacitance are formed presses signal to carry out Filtering Processing to the palace; The amplification filtering circuit of being made up of U1, U2 and other resistance capacitance carries out bandpass filtering, amplification to fetus signal aroused in interest.

3, digital signal processing module

Digital signal processing circuit as shown in figure 23, major function is to Doppler fetus signal aroused in interest, uterine contraction signal sampling and processing.What the impulse ultrasound probe measured mainly is the switch motion of heart of fetus valve, and the doppler shifted signal bandwidth that obtains after the demodulation is less than 1KHz, so the sample frequency of audio signal is 2KHz; The sample rate of uterine contraction pressure is 10Hz.Digital signal processing module can be handled multichannel fetus sign signal simultaneously.

Native system is selected the core of C8051F020 as digital signal processing module for use, and the fetus physiological signal carries out Digital Signal Processing such as digital filtering, auto-correlation computation after sampling by the A/D passage of C8051F020.

Because it is that multiplication computation amount is big that traditional auto-correlation algorithm extracts fetus main difficulty aroused in interest, be difficult for using in real time, use a kind of " amplitude difference average algorithm " to reduce amount of calculation in the present invention, this algorithm is actually a kind of mutation processing method of traditional auto-correlation algorithm.This algorithm be with

∑|x(n)-x(n+m)| m＝0，1，2...N-1

Minimal point and auto-correlation function R _XX(m) maximal point is corresponding.Because

∑(x(n)-x(n+m)) ²＝∑x ²(n)+∑x ²(n+m)-2∑x(n)x(n+m)

As seen at ∑ x ²(n) be under the condition of constant, R _XX(m) maximum point of ∝ ∑ x (n) x (n+m) is just corresponding to D _XX(m) ∝ ∑ | x (n)-x (n+m) | minimum point.This algorithm significantly reduces outside the amount of calculation except avoiding multiplication, and the another one advantage is exactly not strengthen the weight of mistake, and the relative weighting of little error strengthens, the influence of promptly more outstanding weak output signal part in result.

4, main control module design

Main control module is mainly used in to be controlled and dispatches system's each several part.It can use platforms such as MCU, ARM, PC104 to realize.

As shown in figure 24, the main control module of native system adopts ARM9 processor based on Interl XScale microarchitecture as main control chip, chip internal is integrated lcd controller, UART, ADC, SPI interface, I2C or the like peripheral hardware makes that the design of system is more simple and reliable.The major function of main control module is the work that is used for coordinating and controlling other each module.As Figure 24, it reads from digital signal processing module by serial ports or SPI interface, and fetus is aroused in interest, press in the palace, the fetal movement data, and these data deliver to display module, print module shows and print.

5, display module design

The built-in lcd controller of XScale microprocessor provides the interface of supporting two scanning passive array colour display screens (DSTN is commonly called as pseudo-color) or active array colour display screen (TFT is commonly called as very color) screen, and supports monochromatic and polychrom form.It has oneself independently dual pathways dma controller, and two paths is respectively applied for single sided board and dual platen shows.Maximum support display resolution is 1024 * 1024 pixels, and recommending highest resolution is 800 * 600 pixels.

The present invention uses 256 colors, the resolution LCD as 800*600, because processor carries lcd controller, so hardware and software development is very simple, its circuit theory diagrams as shown in figure 25, wherein LDD0～LDD15 is the data/address bus of liquid-crystal controller output, SA-L-PCLK is the Dot Clock that is used for sampled data, and SA-L-LCLK is used for the synchronous row clock of row, and SA-L-FCLK is the frame clock that is used for frame synchronization.On the software, as long as open up a display buffer district on SDRAM, wanting data presented to write in the above, lcd controller will flush data on the LCD screen automatically.

6, man-machine interface circuit design

The present invention uses touch screen and common key-press dual mode to realize man-machine interface, touch screen and main control chip are realized by 4 wire resistive touchscreen translation interface chip ADS783, the hardware line sketch map of ADS7843 touch screen controller and XScale microprocessor as shown in figure 26, X+, Y+, X-, Y-is the input of touch screen electrode aanalogvoltage, DIN serial data input, DOUT serial data outfan, ADS7843 finishes a data transaction and need carry out 3 times with microcontroller and communicate by letter, microprocessor transmits to ADS7843 by asynchronous data DIN and sends control word for the first time, comprising start bit, channel selecting, 8/12 bit pattern, difference/single-ended selection and power-down mode are selected, thereafter it then is that microcontroller takes out 16bitA/D transformation result data (last four automatic zero paddings) from ADS7843 that two secondary data transmit, ADS7843 sends interrupt requests to the XScale microprocessor when the screen triggering is given birth to, respond this interrupt requests by controller, start communication process, read the transformation result of ADS7843, thereby obtain the coordinate of touch point.

7, print module design

Print module mainly is made up of thermal printing head control circuit, stepping motor control circuit, testing circuit and serial communication module, its structured flowchart as shown in figure 27, wherein the step motor drive module is used to control printing paper paper feed and chart drive speed, temperature detection and scarce paper that testing circuit is used for thermal head detect, the thermal printing head control circuit is mainly used in the heating of control thermal head, CPLD and MCU receive the order and the data of main control module on the one hand, coordinate the operate as normal of each modular circuit on the other hand.After MCU received print command and content from serial ports, to the processing that makes an explanation of print command and content, and output control sequential was given CPLD.CPLD drives thermal printer according to the control sequential and carries out paper feed and heating.Meanwhile MCU detects the real-time status of printer, and feeds back to main control module and wait order next time.

Four, groundwork process of the present invention:

When the present invention uses wireless fetal rhythm probe and wireless matrix pressure probe are placed on anemia of pregnant woman's the abdominal part, wireless probe collection and extract fetus signal aroused in interest and physiologic information such as anemia of pregnant woman's abdominal part palace pressure signal is transferred to receiver module by wireless mode and receives.

Receiver module carries out the pretreatment of signal and signal is submitted to digital signal processing module after receiving the fetus physiological signal of wireless transmission.Digital signal processing module calculates the aroused in interest and palace of the fetus of fetus and presses after the relative pressure, is stored and is exported by main control module.Output module comprises display module and print module.Show and demonstration that print module is real-time and print the fetus physiological situation that the confession medical personnel guard and analyze.

Owing to used wireless communication technology, removed the constraint of lead to the anemia of pregnant woman, so as long as the Wireless Fetal monitor device is fixed on the anemia of pregnant woman just can carry out fetal monitoring on one's body, thereby, made things convenient for medical personnel's clinical manipulation simultaneously for the anemia of pregnant woman provides free comfortable protected environment.The wireless monitoring instrument can receive a plurality of anemia of pregnant woman's fetus physiological signal simultaneously, promptly a cover Wireless Fetal monitor system can be guarded a plurality of pregnant and lying-in women simultaneously, so improved greatly monitor service efficiency and reduced guarding spatial requirement, have very wide use prospect.

Fetus monitoring method based on wireless probe of the present invention is characterized in that may further comprise the steps:

(1), ultrasound emission module drive ultrasonic transducer generating and emission ultrasonic wave;

(2), ultrasonic transducer receives corresponding ultrasound echo signal and ultrasound echo signal is carried out acoustic-electric Be converted to the ultrasonic echo signal of telecommunication and this ultrasonic echo signal of telecommunication is outputed to ultrasonic demodulation module, simultaneously Pressure sensor converts pregnant and lying-in women's abdominal pressure to the signal of telecommunication and outputs to the palace and press signal processing circuit;

(3), ultrasonic demodulation module carries out demodulation process to the ultrasonic echo signal of telecommunication and extracts that to obtain fetus aroused in interest Signal also outputs to wireless communication module with this fetus signal aroused in interest, and the palace presses signal processing circuit to electricity simultaneously Signal carries out being sent to wireless communication module after amplification filtering is processed;

(4), wireless communication module presses signal to carry out respectively signal modulation process fetus signal aroused in interest and palace After be transmitted to the wireless receiving module of fetal monitoring main frame;

(5), wireless receiving module presses data, movement of the foetus data to advance in the fetus that receives signal aroused in interest, palace Obtain corresponding fetus signal aroused in interest, palace pressure signal, Fetal Movement Signal after the conversion of row data and the data preliminary treatment, And press signal, Fetal Movement Signal to output to respectively the Digital Signal Processing electricity described each fetus signal aroused in interest, palace The road;

(6), digital signal processing circuit is pressed signal, Fetal Movement Signal to above-mentioned each fetus signal aroused in interest, palace Carry out the Digital Signal Processing of A/D conversion and sampling, digital signal filter and auto-correlation computation;

(7), main control module is connected with digital signal processing circuit by serial ports or SPI interface and believes with numeral Number treatment circuit reads fetus data aroused in interest, palace and presses data and movement of the foetus data and each data is stored, And each data is sent to display module shows, and control and coordinate each wireless receiving module and numeral The working method of signal processing circuit.

Wherein the signal modulation process method in the above-mentioned steps (4) is for adopting the frequency modulation processing method of FM modulation.

Signal modulation process method in the above-mentioned steps (4) may further comprise the steps:

(4.1), earlier fetus signal aroused in interest or palace are pressed signal to carry out A/D and be converted to fetus numeral letter aroused in interest Digital information is pressed in breath or palace;

(4.2), press digital information to be undertaken by MCU or DSP above-mentioned fetus digital information aroused in interest or palace The Digital Signal Processing of compressed encoding;

(4.3), press digital information to pass through closely the digital information aroused in interest of the fetus behind the compressed coding or palace Communications module NFC or ZigBee communications module or Bluetooth communication transport module or other numerals are logical The letter transport module is transmitted to the wireless receiving module of monitoring main frame.

Claims

1, a kind of fetal monitoring system based on wireless probe, it is characterized in that comprising monitoring main frame and at least one Wireless Fetal monitoring probe and/or a wireless matrix pressure probe, wherein each Wireless Fetal monitoring probe or wireless matrix pressure probe are with the fetus that collects signal aroused in interest, signal is pressed in the palace, Fetal Movement Signal carries out sending to the monitoring main frame by Wireless transmission mode after the modulation treatment, and the monitoring main frame receives described fetus data aroused in interest, data are pressed in the palace, laggard line number word signal filtering of fetal movement data and auto-correlation computation processing obtain the fetus physiologic information and it are stored and shows and/or print.

2, fetal monitoring system based on wireless probe according to claim 1, it is characterized in that above-mentioned monitoring main frame comprises at least one wireless receiving module that connects in regular turn, digital signal processing module, main control module, display module, wherein each wireless receiving module is respectively with the fetus that receives data aroused in interest, data are pressed in the palace, the fetal movement data carry out obtaining corresponding fetus signal aroused in interest after data transaction and the data pretreatment, signal is pressed in the palace, Fetal Movement Signal, and with described each fetus signal aroused in interest, signal is pressed in the palace, Fetal Movement Signal outputs to digital signal processing circuit respectively and carries out A/D conversion and sampling, the Digital Signal Processing of digital signal filter and auto-correlation computation, main control module is connected with digital signal processing circuit by serial ports or SPI interface and reads fetus data aroused in interest from digital signal processing circuit, the palace is pressed data and fetal movement data and each data is stored, and each data is sent to display module shows, and control and coordinate the working method of each wireless receiving module and digital signal processing circuit.

3, fetal monitoring system based on wireless probe according to claim 1, it is characterized in that above-mentioned Wireless Fetal monitoring probe comprises the ultrasound emission module that connects to form in regular turn to one, ultrasonic transducer, ultrasonic demodulation module and wireless communication module, wherein, ultrasound emission module drive ultrasonic transducer generating ultrasound wave, and ultrasonic transducer receives ultrasound echo signal and ultrasound echo signal is carried out the acoustic-electric conversion process, the ultrasonic echo signal of telecommunication after ultrasonic transducer is handled is input to ultrasonic demodulation module and carries out demodulation process, extract fetus signal aroused in interest, the fetus of extraction signal aroused in interest is input to wireless communication module again and described fetus signal aroused in interest is transferred to the wireless receiving module of monitoring main frame by wireless communication module.

4, fetal monitoring system based on wireless probe according to claim 1, it is characterized in that above-mentioned wireless matrix pressure probe comprises the pressure transducer that connects to form in regular turn to one, signal processing circuit and wireless communication module are pressed in the palace, wherein, pressure transducer is pressed conversion of signals to become the signal of telecommunication and this signal of telecommunication is outputed to the palace in the palace of anemia of pregnant woman's abdominal part and is pressed signal processing circuit, the wireless receiving module that the palace presses signal processing circuit that this signal of telecommunication is carried out being entered into wireless communication module after amplification filtering is handled and described palace piezoelectric signal is transferred to the monitoring main frame by wireless communication module.

5, according to claim 1 or 2 or 3 or 4 described fetal monitoring systems based on wireless probe, it is characterized in that above-mentioned wireless communication module is a FM modulation transmissions module, the aroused in interest or palace of above-mentioned fetus presses signal or Fetal Movement Signal to be transmitted to the wireless receiving module of monitoring main frame after FM modulation transmissions module utilizes the FM modulation technique to carry out the FM modulation.

6, according to claim 1 or 2 or 3 or 4 described fetal monitoring systems based on wireless probe, it is characterized in that above-mentioned wireless communication module is the digital wireless communication transport module, wherein above-mentioned fetus signal aroused in interest or palace press signal or Fetal Movement Signal to be transmitted to the wireless receiving module of guarding main frame by short-range communication transport module NFC or ZigBee communications module or Bluetooth communication transport module or other digital communication and transmission modules after the Digital Signal Processing of A/D conversion and compressed encoding.

7, according to claim 1 or 2 or 3 or 4 described fetal monitoring systems based on wireless probe, it is characterized in that above-mentioned Wireless Fetal monitoring probe and wireless matrix pressure probe also include power supply and LCD MODULE, wherein said electric supply installation is guarded the ultrasound emission module of probe respectively with Wireless Fetal, ultrasonic transducer, ultrasonic demodulation module, wireless communication module connect or respectively with the pressure transducer of wireless matrix pressure probe, signal processing circuit is pressed in the palace, wireless communication module also is respectively it power supply is provided, and described LCD MODULE is connected and can demonstrates the electric weight of power supply with power supply and each wireless communication module, the communications status of wireless communication module, sequence number sign or other status indicators.

8, according to claim 1 or 3 or 4 described fetal monitoring systems based on wireless probe, it is characterized in that above-mentioned Wireless Fetal monitoring probe or wireless matrix pressure probe also include sealed waterproof case respectively, pressure transducer, the palace of ultrasound emission module, ultrasonic transducer, ultrasonic demodulation module and the wireless communication module of above-mentioned wireless fetal rhythm monitoring probe or wireless matrix pressure probe press signal processing circuit and the equal sealing device of wireless communication module in shell separately.

9, a kind of fetus monitoring method based on wireless probe is characterized in that may further comprise the steps:

10, the fetal monitoring system based on wireless probe according to claim 9 is characterized in that the signal modulation process method in the above-mentioned steps (4) is the synthetic frequency modulation processing method of employing FM.

11, the fetal monitoring system based on wireless probe according to claim 9 is characterized in that the signal modulation process method in the above-mentioned steps (4) may further comprise the steps:

(4.2), press digital information to carry out the Digital Signal Processing of compressed encoding by MCU or DSP above-mentioned fetus digital information aroused in interest or palace;

(4.3), the digital information aroused in interest of the fetus behind the compressed coding or palace are pressed digital information be transmitted to the wireless receiving module of monitoring main frame by short-range communication transport module NFC or ZigBee communications module or Bluetooth communication transport module or other digital communication and transmission modules.