CN102613965B - Physical sign monitoring instrument based on wireless radio-frequency technology and monitoring method thereof - Google Patents

Abstract

A physical sign monitor based on wireless radio frequency technology, used to collect human physiological index data, and transmit the data to monitoring base station equipment through radio frequency communication, including: several sensors, sensor data acquisition modules, processor modules, Zigbee network communication Module and power supply module, the sensor data acquisition module is connected with the sensor and the processor module respectively, in order to send the data collected by the sensor to the processor module, and the processor module is connected with the Zigbee network communication module and the power supply module respectively, in order to receive The received data is processed, displayed and stored, and transmitted to the monitoring base station equipment through the Zigbee network communication module, and the power supply module provides power for the processor module. The invention has the advantages of low power consumption, real-time and high efficiency of data transmission, strong self-organizing network capability and high transmission reliability.

Description

Sign monitoring instrument and monitoring method based on radio frequency technology

technical field

The invention relates to the field of sign monitoring, in particular to a sign monitor based on wireless radio frequency technology and a monitoring method thereof.

Background technique

Body temperature, pulse, blood pressure and other physical signs are important physiological indicators to reflect the health status of the human body. In the past, the physical signs and parameters of the wounded were manually surveyed by ambulance personnel. The survey was labor-intensive, inefficient and ineffective. In addition, the wounded are classified manually by medical staff. After preliminary classification, the wounded wait for follow-up treatment at the scene. At this time, due to the limited medical resources of the emergency medical response team, the wounded often have to wait for a long time before being evacuated. During this period, the condition of the wounded may deteriorate, and secondary injuries, such as hypothermia, hypotension, and cardiac tamponade, may be life-threatening if not treated immediately. In addition, as a land or ship command center, it is impossible to know some statistics and details of the wounded in various places in real time, which also leads to the inability of the command to evenly and reasonably distribute the number of wounded to be treated by each ambulance unit. Therefore, continuous monitoring of the patient's physiological indicators can provide an important basis for the treatment of the wounded.

With the development of sensor technology, embedded computer technology and wireless communication technology, vital sign monitoring system based on wireless sensor network has received more and more attention. Among them, the system based on ordinary radio frequency chip and custom transmission protocol has the advantages of simple implementation and low cost, but the disadvantages are low reliability and poor versatility; the system based on Bluetooth protocol has high data transmission rate, but short operating distance , high power consumption, and weak networking capability; ZigBee is a low-speed wireless personal area network (Low-Rate Wireless PersonalNet-work, LR-WPAN) protocol specification based on the IEEE802.15.4 communication standard, and the system formed has low complexity, The advantages of low power consumption, high reliability, and strong networking capabilities have become a hot spot for application research in this field.

To sum up, there is an urgent need to provide a ZigBee network protocol-based vital sign monitoring system for the health service command department, which is real-time, efficient, and reliable, and can monitor and summarize the wounded in real time during wartime and peacetime. And report to the command center in time for the wounded sign monitor.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a real-time, efficient and reliable physical sign monitor based on wireless radio frequency technology.

Another object of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a real-time, efficient and reliable physical sign monitoring method based on radio frequency technology.

In order to achieve the above purpose, the present invention provides a physical sign monitor based on wireless radio frequency technology, which is used to collect human physiological index data, and transmit the data to monitoring base station equipment through radio frequency communication, including: several sensors, sensor data acquisition modules , processor module, Zigbee network communication module and power supply. The sensor is used to collect human physiological index data in real time. The sensor data acquisition module is connected to the sensor and the processor module respectively to send the data collected by the sensor to the processor module for processing. The controller module is respectively connected with the Zigbee network communication module and the power supply to process, display and store the received data, and transmit it to the monitoring base station equipment through the Zigbee network communication module, and the power supply module provides power for the processor module, which further Including CPU, conditioning circuit, A/D conversion circuit and memory, the conditioning circuit is used to filter and amplify the signal collected by the sensor and send it to the A/D conversion circuit, and the A/D conversion circuit is used to convert the signal into a digital signal After that, it is sent to the CPU, which analyzes and processes the digital signal and stores the final physiological characteristic data into the memory, and transmits it to the monitoring base station equipment through the Zigbee network communication module.

The physical sign monitor based on radio frequency technology according to the preferred embodiment of the present invention also includes a digital display screen connected to the processor module for displaying the data received by the processor module.

According to the physical sign monitor based on radio frequency technology described in the preferred embodiment of the present invention, the sensor data acquisition module and the processor module are connected through a serial interface, and the serial interface adopts an RS232 interface.

According to the physical sign monitor based on wireless radio frequency technology described in the preferred embodiment of the present invention, its processor module adopts ZigbeeCC2530 series chips of TI Company.

According to the physical sign monitor based on radio frequency technology described in a preferred embodiment of the present invention, its sensor includes:

Body temperature sensor: It is used to monitor body temperature data through infrared ear temperature technology, and is worn on the head of the wounded in an ear-mounted manner for real-time body temperature data collection;

Pulse sensor: used to collect the heart rate and pulse data of the wounded in real time through finger clips; and,

Blood pressure sensor: It is used to measure the fluctuation of the radial artery by acting on the radial artery of the wrist to reflect the blood pressure of the subject.

According to the physical sign monitor based on wireless radio frequency technology described in the preferred embodiment of the present invention, its conditioning circuit and A/D conversion circuit adopt CMOS circuits.

According to the physical sign monitoring instrument based on wireless radio frequency technology described in the preferred embodiment of the present invention, its power supply module includes a 3V battery and a MAX856 DC pumping circuit, and the MAX856 DC pumping circuit is connected with the battery for converting the power supply voltage. Boost the voltage to 5V.

In order to achieve the above object, the present invention also provides a physical sign monitoring method based on radio frequency technology, which divides the application program of the physical sign monitor based on radio frequency technology into four main threads, network receiving and analyzing threads, serial port receiving threads and serial port analyzing threads. The thread performs data monitoring, which specifically includes the following steps:

(1) The main thread applies for the required resources and initializes all the used devices and modules in the initial stage, and then creates the remaining three threads. After that, the main thread enters the event waiting loop, waiting for the operation of the monitoring base station user or other threads to send news;

(2) The network receiving and analyzing thread monitors the network interface and waits for the arrival of the network data packet. When the thread receives the network data packet, it analyzes the network data packet, extracts valid data, and notifies the main thread through the message mechanism, and the main thread Automatically call a specific callback function for processing according to the type of the message;

(3) the serial port receiving thread monitors the serial port, and when the serial port has data to arrive, this thread places the data received by the serial port into the shared buffer of the serial port receiving thread and the serial port parsing thread in units of bytes;

(4) The serial port parsing thread obtains a data packet sequentially in units of bytes from the buffer, verifies and analyzes the obtained data, obtains valid physiological characteristic data, and sends a specific type of message to the main thread according to the type of valid data After the main thread receives the message, it calls the corresponding callback function to change the physiological characteristic value displayed on the user interface of the monitoring base station.

The physical sign monitor and monitoring method based on radio frequency technology of the present invention transmit data by means of radio frequency communication, and realize data transmission based on the ZigBee network protocol. The data transmission is real-time, efficient and reliable, and has low power consumption and strong self-organizing network capability. It realizes the real-time monitoring and summarization of the injuries of the wounded in wartime and peacetime, and communicates and reports to the command center in time. In addition, the present invention also adopts the CC2530 micro-controller with low power consumption and high integration, and all circuits adopt CMOS integrated circuits with extremely small static power consumption and easy control of dynamic power consumption, realizing "doing more, less consumption, less The optimization of "doing little consumption, no consumption, no consumption". Therefore, compared with the prior art, the present invention has the advantages of low power consumption, real-time and high efficiency data transmission, strong self-organizing network capability, and high transmission reliability.

Description of drawings

Fig. 1 is the structural principle diagram of the physical sign monitoring instrument based on wireless radio frequency technology of the present invention;

FIG. 2 is a flow chart of the method for monitoring physical signs based on radio frequency technology in the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

Please refer to Fig. 1, a physical sign monitor based on wireless radio frequency technology, which is used to collect human physiological index data, and transmit the data to monitoring base station equipment through radio frequency communication, including: several sensors 10, sensor data acquisition module 20, Processor module 30 , Zigbee network communication module 40 , power module 50 and digital display 60 . The sensor 10 is used to collect human physiological index data in real time, the sensor data acquisition module 20 is connected to the sensor 10, and is connected to the processor module 30 through the RS232 serial interface, so as to send the data collected by the sensor 10 to the processor module 30, The processor module 30 is connected with the Zigbee network communication module 40 and the power supply module 50 respectively, in order to process, display and store the data received, and transmit to the monitoring base station equipment by the Zigbee network communication module 40, by the power supply module 50 for processing The sensor module 30 provides power, which further includes a CPU31, a conditioning circuit 32, an A/D conversion circuit 33 and a memory 34, and the conditioning circuit 32 is used to filter and amplify the signal collected by the sensor 10 and send it to the A/D conversion circuit 33 , the A/D conversion circuit 33 is used to convert the signal into a digital signal and send it to the CPU31. After the CPU31 analyzes and processes the digital signal, the finally obtained physiological characteristic data is stored in the memory 34, and is transmitted to the monitoring device through the Zigbee network communication module 40. base station equipment. The memory 34 is used to store the temporary data collected by the sensor 10 , and after the data is transmitted by the processor module 30 , no large amount of data is stored. The digital display screen 60 is connected with the processor module 30 for displaying the data received by the processor module 30 .

In this embodiment, the processor module 30 adopts the ZigbeeCC2530 series chips of TI Company, the conditioning circuit 32 and the A/D conversion circuit 33 adopt CMOS circuits, the power supply module 50 includes a 3V battery and a MAX856 DC pumping circuit, and the MAX856 DC pump The boost circuit is connected with the battery, and the voltage is boosted to 5V when the power supply voltage is converted.

The CC2530 microcontroller is a low-power, highly integrated microcontroller specially designed for handheld devices. CC2530 is based on ARM architecture, adopts ARM920T processor core, and the clock frequency can reach up to 203MHz. The microcontroller not only has a processing unit (CPU), but also integrates some common interface controllers, such as serial interface (UART), LCD controller supporting thin film transistor (TFT), flash memory (NAND FLASH) controller, touch screen Interface, Universal Serial Bus (USB) controller, etc. In addition, the microcontroller also has a built-in memory management unit (MMU).

Low power consumption is an important issue in system design. Since CMOS circuits have extremely small static power consumption, extremely controllable dynamic power consumption and good power management characteristics, all CMOS integrated circuits are used in this system. The principle of power consumption management of CMOS circuits is to minimize the average power consumption during system operation and achieve the goal of zero power consumption. Do not waste" optimization.

Considering the power consumption and volume requirements of the wearable device comprehensively, and at the same time, in order to match the level of the wireless transceiver module in the device, a 3V battery is selected as the entire power supply of the system in this embodiment. MAX856 is a high-efficiency, DC-DC DC pumping circuit, especially suitable for battery-powered circuits. It has a conversion efficiency of 85% at 100mA. In shutdown mode, the power consumption is only 1μA, and it has a low-voltage monitoring function. , Through the voltage boost of MAX856, the system can conveniently realize the power supply of 3V and 5V two voltage modes. At the same time, this circuit also has the function of power management, realizing the bus distributed power system.

In this embodiment, the sensor 10 includes a body temperature sensor, a pulse sensor and a blood pressure sensor. in,

Body temperature sensor: It is used to monitor body temperature data through infrared ear temperature technology, and is worn on the head of the wounded in an ear-mounted manner for real-time body temperature data collection;

Pulse sensor: used to collect the heart rate and pulse data of the wounded in real time through finger clips; and,

Blood pressure sensor: It is used to measure the fluctuation of the radial artery by acting on the radial artery of the wrist to reflect the blood pressure of the subject.

It should be noted that the sensors used in the present invention are not limited to the above-mentioned sensor types. The physical sign monitor based on radio frequency technology of the present invention provides a rich interface for the expansion of the sensor. If other types of physiological index data are required, such as ECG, blood sugar, blood oxygen, brain hemorrhage and other data, you only need to connect the corresponding sensors to the reserved interface to form a new wireless sensor node, and develop corresponding embedded control and processing software to process the sensor data. The acquisition module can be upgraded accordingly. For example, by installing a brain hemorheology monitoring sensor combined with a portable B-ultrasound machine, the hemorheology of the brain and other physiological tissues of the wounded can be monitored after the corresponding upgrade of the sensor data acquisition module.

Please refer to Fig. 2 again, in order to achieve the above-mentioned purpose, the present invention also provides a kind of sign monitoring method based on radio frequency technology, divides the sign monitor application program based on radio frequency technology into main thread, network receiving analysis thread, serial port receiving thread And the serial port analysis thread four threads for data monitoring, including the following steps:

(1) The main thread applies for the required resources and initializes all the used devices and modules in the initial stage, and then creates the remaining three threads. After that, the main thread enters the event waiting loop, waiting for the operation of the monitoring base station user or other threads to send news;

(2) The network receiving and analyzing thread listens to the network interface (that is, the Zigbee network communication module), and waits for the arrival of the network data packet. When the thread receives the network data packet, it analyzes the network data packet, extracts valid data, and passes the message mechanism Notify the main thread, and the main thread will automatically call a specific callback function for processing according to the type of the message;

(3) the serial port receiving thread monitors the serial port (connected with the sensor data acquisition module 20), when the serial port has data to arrive, this thread places the data received by the serial port into the serial port receiving thread and the serial port parsing thread in units of bytes. in the buffer;

(4) The serial port parsing thread obtains a data packet sequentially in units of bytes from the buffer, verifies and analyzes the obtained data, obtains valid physiological characteristic data, and sends a specific type of message to the main thread according to the type of valid data After the main thread receives the message, it calls the corresponding callback function to change the physiological characteristic value displayed on the user interface of the monitoring base station.

The above is only a preferred implementation example of the present invention, and is not intended to limit the present invention in any form, any content that does not deviate from the technical solution of the present invention, any simple modification made to the above implementation examples according to the technical essence of the present invention , equivalent changes and modifications all belong to the scope of the technical solution of the present invention.

Claims (1)

1. A monitoring method of a physical sign monitor based on radio frequency technology, The physical sign monitor based on wireless radio frequency technology is used to collect human physiological index data, and transmit the data to monitoring base station equipment through radio frequency communication, and is characterized in that it includes: several sensors, sensor data acquisition modules, and processor modules , a Zigbee network communication module and a power supply module, the sensor is used to collect human physiological index data in real time, and the sensor data acquisition module is connected with the sensor and the processor module respectively, in order to send the data collected by the sensor to A processor module, the processor module is respectively connected with the Zigbee network communication module and the power supply module, in order to process, display and store the received data, and transmit it to the monitoring base station equipment through the Zigbee network communication module, The power supply module provides power for the processor module, which further includes a CPU, a conditioning circuit, an A/D conversion circuit and a memory, and the conditioning circuit is used to filter and amplify the signal collected by the sensor and send it to the A/D A conversion circuit, the A/D conversion circuit is used to convert the signal into a digital signal and send it to the CPU, and the CPU analyzes and processes the digital signal and stores the finally obtained physiological characteristic data into the memory, and passes The Zigbee network communication module is transmitted to the monitoring base station equipment; It is characterized in that the application program of the physical sign monitor based on wireless radio frequency technology is divided into four threads of main thread, network receiving and analyzing thread, serial port receiving thread and serial port analyzing thread for data monitoring, specifically including the following steps: (1) The main thread applies for the required resources and initializes all used devices and modules in the initial stage, and then creates the remaining three threads. After that, the main thread enters the event waiting loop, waiting for the operation of the monitoring base station user or other threads to send news; (2) The network receiving and analyzing thread monitors the network interface and waits for the arrival of the network data packet. When the thread receives the network data packet, it analyzes the network data packet, extracts valid data, and notifies the main thread through the message mechanism. The main thread Automatically call a specific callback function for processing according to the type of the message; (3) The serial port receiving thread monitors the serial port. When data arrives at the serial port, the thread puts the data received by the serial port in bytes into the buffer shared by the serial port receiving thread and the serial port parsing thread; (4) The serial port analysis thread obtains a data packet from the buffer in byte units, verifies and analyzes the obtained data, obtains valid physiological characteristic data, and sends a specific type of message to the main thread according to the type of valid data After the main thread receives the message, it calls the corresponding callback function to change the physiological characteristic value displayed on the user interface of the monitoring base station.

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