Data transfer circuit for ambulatory blood pressure recorder

Abstract

The application provides a data transmission circuit for a dynamic blood pressure recorder, which comprises an infrared coding decoding chip and an infrared sending tube to form an infrared communication circuit, and a serial memory is arranged in the dynamic blood pressure recorder, and data collected by the dynamic blood pressure recorder is stored in the serial memory; when data needs to be sent out, the data is read from the serial memory through a control chip, and the data is sent to the infrared communication circuit through a UART0 serial port of the control chip and then sent to the outside by the infrared communication circuit; and a data receiving end on the outside only needs to receive data through an infrared adapter; the technical scheme of the application does not need to plug and unplug an SD card, and does not need to connect data based on a serial port mode, and data in the dynamic blood pressure recorder can be sent to the outside based on an infrared communication mode.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a data transmission circuit for a dynamic blood pressure recorder. Background Technology

[0002] Existing ambulatory blood pressure recorders collect only about 12KB of blood pressure waveform data per set, with a total capacity of no more than 600KB for 50 measurements per day. Data is typically stored on an SD card or internal memory. When data needs to be transferred to external devices, it is either retrieved from the SD card or extracted via RS232 serial protocol. However, with the development of SD cards, manufacturers are gradually ceasing production of small-capacity, low-cost SD cards and shifting towards producing larger-capacity ones. Using SD cards as the storage medium for ambulatory blood pressure recorders not only wastes resources but also increases the overall product cost. Furthermore, wired serial port data export is cumbersome, and in practice, the connector has become unreliable after repeated plugging and unplugging. Summary of the Invention

[0003] To address the issues of rising costs associated with SD cards and inconvenience caused by wired serial ports in existing ambulatory blood pressure recorders that rely on SD cards or wired serial ports for data export, this invention provides a data transmission circuit for ambulatory blood pressure recorders that eliminates the need for SD cards or wired connections. This not only avoids the high cost of SD cards but also prevents the problem of poor contact after repeated use of serial cables.

[0004] The structure of this utility model is as follows: a data transmission circuit for a dynamic blood pressure recorder, characterized in that it includes: an infrared communication circuit, a serial port memory, and a control chip; The infrared communication circuit includes an infrared encoder / decoder chip and an infrared transmitter, which are interconnected to form a data exchange circuit based on infrared communication; the infrared encoder / decoder chip is connected to the UART0 port of the controller. The serial port memory is located inside the dynamic blood pressure recorder and stores the blood pressure data collected by the dynamic blood pressure recorder. The serial port memory is connected to the SPI port of the control chip. The control chip is based on the C8051F series microcontroller chip.

[0005] Its further features are: The infrared encoder / decoder chip is based on the TOIM4232 chip; the infrared transmitter is based on the TFDU4100 chip. The serial port memory is implemented based on the AT45DB081 memory; The serial port memory is connected to the SPI port of the control chip in SPI slave mode. The infrared communication circuit includes: an infrared encoder / decoder chip U3_7, an infrared transmitter U3_8, resistors R3_9 and R3_10, and capacitors C3_21, C3_22, C3_5, and C3_6. Pin 1 of the infrared encoder / decoder chip U3_7 is connected to pin 42 of the control chip; pin 2 of the infrared encoder / decoder chip U3_7 is connected to pin 43 of the control chip; pin 3 of the infrared encoder / decoder chip U3_7 is connected to pin 61 of the control chip; pin 4 of the infrared encoder / decoder chip U3_7 is connected to pin 62 of the control chip; pin 5 of the infrared encoder / decoder chip U3_7 is connected to one end of the resistor R3_10; and pin 6 of the infrared encoder / decoder chip U3_7 is connected to the control chip. Pin 32 of the chip is connected to pin 8 of the infrared encoder / decoder chip U3_7, which is grounded. Pin 14 of the infrared encoder / decoder chip U3_7 is connected to pin 3 of the infrared transmitter U3_8. Pin 15 of the infrared encoder / decoder chip U3_7 is connected to pin 4 of the infrared transmitter U3_8. Pin 16 of the infrared encoder / decoder chip U3_7 is connected to one end of capacitor C3_21, the positive terminal of capacitor C3_5, and then connected to VCC. The other end of capacitor C3_21 is connected to the negative terminal of capacitor C3_5 and then grounded. Pin 1 of the infrared transmitter U3_8 is connected to one end of the resistor R3_9, and the other end of the resistor R3_9 is connected to VCC. Pin 6 of the infrared transmitter U3_8 is connected to the other end of the resistor R3_10, one end of the capacitor C3_22, and the positive terminal of the capacitor C3_6. The other end of the capacitor C3_22 and the negative terminal of the capacitor C3_6 are connected to ground. Pins 7 and 8 of the infrared transmitter U3_8 are grounded. The circuit of the serial port memory includes: serial port memory U3_6, resistor R3_8 and resistor R3_7; Pin 1 of the serial port memory U3_6 is connected to pin 58 of the control chip; pin 2 of the serial port memory U3_6 is connected to pin 60 of the control chip; pin 3 of the serial port memory U3_6 is connected to one end of resistor R3_8, and the other end of resistor R3_8 is connected to VCC; pin 4 of the serial port memory U3_6 is connected to pin 49 of the control chip; pin 5 of the serial port memory U3_6 is connected to one end of resistor R3_7, and the other end of resistor R3_7 is connected to VCC; pin 6 of the serial port memory U3_6 is connected to VCC; pin 7 of the serial port memory U3_6 is grounded; and pin 8 of the serial port memory U3_6 is connected to pin 59 of the control chip.

[0006] This application provides a data transmission circuit for an ambulatory blood pressure recorder. It integrates an infrared encoder / decoder chip and an infrared transmitter to form an infrared communication circuit. A serial port memory is located inside the ambulatory blood pressure recorder, storing the data collected by the recorder. When data needs to be sent externally, the control chip reads the data from the serial port memory and sends it to the infrared communication circuit via the control chip's UART0 serial port. The infrared communication circuit then transmits the data to the outside. The external data receiver only needs an infrared adapter to receive the data. This technical solution eliminates the need for inserting or removing an SD card or using a serial port-based data connection; it uses infrared communication to transmit data from the ambulatory blood pressure recorder to the outside. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the circuit structure of the control chip; Figure 2 This is a schematic diagram of the circuit structure of an infrared communication circuit. Figure 3 This is a schematic diagram of the circuit structure of a serial port memory. Detailed Implementation

[0008] This application includes a data transmission circuit for a dynamic blood pressure recorder, comprising: a control chip U3_1 for the blood pressure recorder, an infrared communication circuit, and a serial port memory U3_6.

[0009] The control chip U3_1 is based on the control chip of an existing dynamic blood pressure recorder. In this embodiment, the control chip is based on the C8051F series microcontroller chip. Specifically, as... Figure 1 As shown, it can be based on either C8051F020 or C8051F022. (Refer to...) Figure 1 To ensure the normal operation of the control chip U3_1, capacitors C3_3, C3_4, C3_5, C3_6, C3_7, C3_8, and CT3_3, resistor R3_5, and crystal oscillator G3_1 are also provided in this embodiment as peripheral circuits for the control chip U3_1.

[0010] The serial port memory U3_6 can be implemented based on the existing internal memory of the ambulatory blood pressure recorder. In this embodiment, to reduce costs, a small-capacity memory, such as a 1MB AT45DB081 memory, is used in conjunction with the infrared communication circuit. This effectively controls costs while ensuring stable and reliable data transmission. The serial port memory U3_6 is located inside the ambulatory blood pressure recorder and stores the blood pressure data collected by the recorder. The serial port memory U3_6 is connected to the SPI (P0.2~P0.5) port of the control chip in SPI slave mode, acting as an SPI slave device of the control chip and responding to command signals from the control chip U3_1. The specific method for adjusting the SPI slave mode can be implemented using existing technologies of the microcontroller chips C8051F020 or C8051F022.

[0011] The infrared communication circuit includes an infrared encoder / decoder chip and an infrared transmitter, which are interconnected to form a data exchange circuit based on infrared communication. The infrared encoder / decoder chip is connected to the UART0 port of the controller. Specifically, the infrared encoder / decoder chip is implemented based on the TOIM4232 chip; the infrared transmitter is implemented based on the TFDU4100 chip. Compared with the data transmission method based on serial port wired connection to external devices in the prior art, the infrared wireless transmission circuit constructed in this application allows users to send data while wearing the blood pressure monitor, avoiding electrical connection between the user and the network, and providing higher safety.

[0012] like Figure 2 As shown, the infrared communication circuit includes: an infrared encoder / decoder chip U3_7, an infrared transmitter U3_8, resistors R3_9 and R3_10, and capacitors C3_21, C3_22, C3_5, and C3_6. C3_5 and C3_6 are tantalum capacitors.

[0013] Pin 1 of infrared encoder / decoder chip U3_7 is connected to pin 42 of control chip; pin 2 of infrared encoder / decoder chip U3_7 is connected to pin 43 of control chip; pin 3 of infrared encoder / decoder chip U3_7 is connected to pin 61 of control chip; pin 4 of infrared encoder / decoder chip U3_7 is connected to pin 62 of control chip; pin 5 of infrared encoder / decoder chip U3_7 is connected to one end of resistor R3_10; pin 6 of infrared encoder / decoder chip U3_7 is connected to pin 32 of control chip; pin 8 of infrared encoder / decoder chip U3_7 is grounded; pin 14 of infrared encoder / decoder chip U3_7 is connected to pin 3 of infrared transmitter tube U3_8; pin 15 of infrared encoder / decoder chip U3_7 is connected to pin 4 of infrared transmitter tube U3_8; pin 16 of infrared encoder / decoder chip U3_7 is connected to one end of capacitor C3_21, the positive terminal of capacitor C3_5, and then connected to VCC; the other end of capacitor C3_21 is connected to the negative terminal of capacitor C3_5 and then grounded. Pin 1 of infrared transmitter U3_8 is connected to one end of resistor R3_9, and the other end of resistor R3_9 is connected to VCC. Pin 6 of infrared transmitter U3_8 is connected to the other end of resistor R3_10, one end of capacitor C3_22, and the positive terminal of capacitor C3_6. The other end of capacitor C3_22 and the negative terminal of capacitor C3_6 are connected to ground. Pins 7 and 8 of infrared transmitter U3_8 are grounded.

[0014] The serial port output pins 14 (TDIR) and 15 (RDIR) of the TOIM4232 infrared encoder / decoder chip are connected to pins 3 (TDIR) and 4 (RDIR) of the TFDU4100 infrared transmitter. The TOIM4232 infrared encoder / decoder chip is connected to the UART0 (P0.0, P0.1) of the control chip C8051F020. The communication baud rate is selected according to actual needs; in this embodiment, it is set to 57600bps. P2.3 and P2.4 of the control chip C8051F020 are the control lines of the TOIM4232 infrared encoder / decoder chip, realizing the transmission of control commands. The clock output (P1.4) of the control chip C8051F020 serves as the clock for the TOIM4232 infrared encoder / decoder chip, enabling the TOIM4232 infrared encoder / decoder chip to operate within the frequency band of the control chip.

[0015] like Figure 3 As shown, the circuit of the serial port memory includes: serial port memory U3_6, resistor R3_8 and resistor R3_7.

[0016] Pin 1 of serial port memory U3_6 is connected to pin 58 of the control chip; pin 2 of serial port memory U3_6 is connected to pin 60 of the control chip; pin 3 of serial port memory U3_6 is connected to one end of resistor R3_8, and the other end of resistor R3_8 is connected to VCC; pin 4 of serial port memory U3_6 is connected to pin 49 of the control chip; pin 5 of serial port memory U3_6 is connected to one end of resistor R3_7, and the other end of resistor R3_7 is connected to VCC; pin 6 of serial port memory U3_6 is connected to VCC; pin 7 of serial port memory U3_6 is grounded; and pin 8 of serial port memory U3_6 is connected to pin 59 of the control chip.

[0017] After using the technical solution of this utility model, the blood pressure measurement data during the operation of the ambulatory blood pressure recorder is stored in a small-capacity serial port memory. The infrared encoder / decoder chip and the infrared transmitter tube form an infrared communication circuit inside the ambulatory blood pressure recorder. When data needs to be transmitted externally, the data transmission circuit in this solution supports reading data from the small-capacity serial port memory through the MCU and sending it to the infrared encoder / decoder chip in the infrared communication circuit through the MCU's UART0 serial port. Then, the infrared encoder / decoder chip and the infrared transmitter tube in the infrared communication circuit work together to transmit the data to the outside. The external receiving end only needs to be equipped with an infrared adapter to receive the data.

Claims

1. A data transmission circuit for an ambulatory blood pressure recorder, characterized in that, It includes: Infrared communication circuit, serial port memory, and control chip; The infrared communication circuit includes an infrared encoder / decoder chip and an infrared transmitter, which are interconnected to form a data exchange circuit based on infrared communication. The infrared encoder / decoder chip is connected to the UART0 port of the controller; The serial port memory is located inside the dynamic blood pressure recorder and stores the blood pressure data collected by the dynamic blood pressure recorder. The serial port memory is connected to the SPI port of the control chip. The control chip is based on the C8051F series microcontroller chip.

2. The data transmission circuit for a dynamic blood pressure recorder according to claim 1, characterized in that: The infrared encoder / decoder chip is based on the TOIM4232 chip; the infrared transmitter is based on the TFDU4100 chip.

3. The data transmission circuit for a dynamic blood pressure recorder according to claim 1, characterized in that: The serial port memory is implemented based on the AT45DB081 memory.

4. The data transmission circuit for a dynamic blood pressure recorder according to claim 1, characterized in that: The serial port memory is connected to the SPI port of the control chip in SPI slave mode.

5. The data transmission circuit for a dynamic blood pressure recorder according to claim 1, characterized in that: The infrared communication circuit includes: an infrared encoder / decoder chip U3_7, an infrared transmitter U3_8, resistors R3_9 and R3_10, and capacitors C3_21, C3_22, C3_5, and C3_6. Pin 1 of the infrared encoder / decoder chip U3_7 is connected to pin 42 of the control chip; pin 2 of the infrared encoder / decoder chip U3_7 is connected to pin 43 of the control chip; pin 3 of the infrared encoder / decoder chip U3_7 is connected to pin 61 of the control chip; pin 4 of the infrared encoder / decoder chip U3_7 is connected to pin 62 of the control chip; pin 5 of the infrared encoder / decoder chip U3_7 is connected to one end of the resistor R3_10; and pin 6 of the infrared encoder / decoder chip U3_7 is connected to the control chip. Pin 32 of the chip is connected to pin 8 of the infrared encoder / decoder chip U3_7, which is grounded. Pin 14 of the infrared encoder / decoder chip U3_7 is connected to pin 3 of the infrared transmitter U3_8. Pin 15 of the infrared encoder / decoder chip U3_7 is connected to pin 4 of the infrared transmitter U3_8. Pin 16 of the infrared encoder / decoder chip U3_7 is connected to one end of capacitor C3_21, the positive terminal of capacitor C3_5, and then connected to VCC. The other end of capacitor C3_21 is connected to the negative terminal of capacitor C3_5 and then grounded. Pin 1 of the infrared transmitter U3_8 is connected to one end of the resistor R3_9, and the other end of the resistor R3_9 is connected to VCC. Pin 6 of the infrared transmitter U3_8 is connected to the other end of the resistor R3_10, one end of the capacitor C3_22, and the positive terminal of the capacitor C3_6. The other end of the capacitor C3_22 and the negative terminal of the capacitor C3_6 are connected to ground. Pins 7 and 8 of the infrared transmitter U3_8 are grounded.

6. The data transmission circuit for a dynamic blood pressure recorder according to claim 1, characterized in that: The circuit of the serial port memory includes: serial port memory U3_6, resistor R3_8 and resistor R3_7; Pin 1 of the serial port memory U3_6 is connected to pin 58 of the control chip; pin 2 of the serial port memory U3_6 is connected to pin 60 of the control chip; pin 3 of the serial port memory U3_6 is connected to one end of resistor R3_8, and the other end of resistor R3_8 is connected to VCC; pin 4 of the serial port memory U3_6 is connected to pin 49 of the control chip; pin 5 of the serial port memory U3_6 is connected to one end of resistor R3_7, and the other end of resistor R3_7 is connected to VCC; pin 6 of the serial port memory U3_6 is connected to VCC; pin 7 of the serial port memory U3_6 is grounded; and pin 8 of the serial port memory U3_6 is connected to pin 59 of the control chip.

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