CN208129994U - Pulse signal acquires Transmission System - Google Patents
Pulse signal acquires Transmission System Download PDFInfo
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- CN208129994U CN208129994U CN201720721557.3U CN201720721557U CN208129994U CN 208129994 U CN208129994 U CN 208129994U CN 201720721557 U CN201720721557 U CN 201720721557U CN 208129994 U CN208129994 U CN 208129994U
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- 238000004458 analytical method Methods 0.000 description 2
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- 238000013186 photoplethysmography Methods 0.000 description 2
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- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
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Abstract
The utility model discloses a kind of pulse signals to acquire Transmission System, it mainly include pulse signal acquisition module, microprocessor module, wireless blue tooth communication module and system power supply module, pulse signal acquisition module is connected with microprocessor module, microprocessor module is connected with wireless blue tooth communication module, and system power supply module is connected with other three modules respectively and provides power supply for it；Pulse signal acquisition module includes three kinds of pulse transducers and signal conditioning circuit；Pulse signal acquisition module includes piezoelectric membrane pulse transducer, the infrared pulse transducer of penetration and reflective infrared pulse transducer.Since system uses modularized design, system bulk is small, and easy to carry, detachable between each module facilitates understanding of the student to system, is also beneficial to the technology innovation of module and the multiplexing of achievement.Therefore, the utility model is very suitable for using in biomedical engineering practice of innovation teaching.
Description
Technical Field
The utility model belongs to the technical field of the teaching equipment of pulse signal acquisition in the biomedical engineering, especially, relate to a pulse signal acquisition transmission experimental system.
Background
The physiological parameter detection system is an important learning module for the biomedical engineering major (the direction of medical instruments), and the traditional experimental teaching equipment integrates detection modules of a plurality of physiological parameters such as blood pressure, electrocardio, blood oxygen saturation, pulse wave, temperature and the like into an experimental box in a modular design mode. However, such teaching devices are typically only capable of performing confirmatory experiments.
The pulse wave is used as a basic physiological signal, and can be further used for detecting and analyzing other physiological parameters such as cardiovascular parameters, heart rate variation, respiration, blood pressure and the like. The pulse signal detection has the characteristic of being noninvasive, so that the pulse signal detection has wide application prospect in practice. In recent years, cardiovascular parameter analysis and blood pressure measurement based on non-invasive pulse detection technology are also hot points of research.
With the coming of the internet plus era and the adoption of new teaching methods, the traditional teaching equipment can not meet the requirements of innovative practice teaching. Therefore, a set of experimental equipment taking pulse signals as teaching objects is designed, and the current new technology is introduced into practice teaching to meet the requirements of current innovation practice teaching, which is very important for the development of the innovation practice capability of students, but the teaching equipment on the market is very lack at present.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a pulse signal acquisition transmission experimental system that small, convenient to carry, modularization, technique are updated easily.
In order to solve the technical problem, the utility model discloses a following technical scheme: the pulse signal acquisition and transmission experiment system mainly comprises a pulse signal acquisition module, a microprocessor module, a wireless Bluetooth communication module and a system power module, wherein the pulse signal acquisition module is connected with the microprocessor module, the microprocessor module is connected with the wireless Bluetooth communication module, and the system power module is respectively connected with other three modules and provides power for the other three modules; the pulse signal acquisition module comprises three pulse sensors and a signal conditioning circuit; the pulse signal acquisition module comprises a piezoelectric film pulse sensor, a penetrating infrared pulse sensor and a reflecting infrared pulse sensor.
The signal conditioning circuit mainly comprises an impedance converter, a 20HZ low-pass filter, a primary amplifying and filtering circuit, a secondary amplifying and filtering circuit, a low-pass filter and an amplifying circuit; the piezoelectric film pulse sensor is connected with the microprocessor module through the impedance converter, the 20HZ low-pass filter and the secondary amplification filter circuit, the penetrating infrared pulse sensor is connected with the microprocessor module through the primary amplification filter circuit and the secondary amplification filter circuit, and the reflecting infrared pulse sensor is connected with the microprocessor module through the low-pass filter and the amplification circuit.
The microprocessor module mainly comprises an MCU chip which is respectively connected with a crystal oscillator circuit, a reset circuit, a buzzer circuit, an independent key circuit, an LED display circuit, a download circuit and a matrix key circuit.
The penetrating infrared pulse sensor adopts an HRM-2104 model correlation type infrared transmitting and receiving sensor; the reflective infrared pulse sensor adopts a pulseSensor module; the wireless Bluetooth communication module adopts a 2.0 standard HC-05 mode Bluetooth serial port module.
The impedance converter is composed of a voltage level follower of 10M ohm; the second-stage amplification filtering circuit comprises a first-order passive high-pass filter with the cut-off frequency of 0.5HZ and a first-order active low-pass filter with the cut-off frequency of 20 HZ; the MCU chip is an enhanced 51-core singlechip STC12C5A60S2 model.
Aiming at the problems of the existing pulse signal acquisition teaching equipment, the inventor designs and manufactures a pulse signal acquisition transmission experimental system which mainly comprises a pulse signal acquisition module, a microprocessor module, a wireless Bluetooth communication module and a system power module, wherein the pulse signal acquisition module is connected with the microprocessor module, the microprocessor module is connected with the wireless Bluetooth communication module, and the system power module is respectively connected with other three modules and provides power for the other three modules; the pulse signal acquisition module comprises three pulse sensors and a signal conditioning circuit; the pulse signal acquisition module comprises a piezoelectric film pulse sensor, a penetrating infrared pulse sensor and a reflecting infrared pulse sensor. This experimental system regards as the teaching object with the pulse signal, has introduced blood pressure and has not had the new technologies such as measurement of creating, cardiovascular parameter is not created and is detected, through the pulse signal of two kinds of different grade types of collection pressure pulse wave and photoplethysmography, with the signal transmission to the host computer of gathering, can further be used for other physiological parameters such as analysis blood pressure, cardiovascular parameter, this improvement and the achievement output that is favorable to student's innovation practice ability. Because the system adopts the modular design, the system is small in size and convenient to carry, and all modules can be freely disassembled and assembled, so that the system is beneficial to the understanding of students on the system, and the technical updating of the modules and the multiplexing of results are also beneficial. Therefore, the utility model is very suitable for being used in the teaching of the innovative practice of the biomedical engineering specialty.
Drawings
Fig. 1 is a schematic structural view of the pulse signal acquisition and transmission experiment system of the present invention.
In the figure: 1 pulse signal acquisition module, 11 three kinds of pulse sensors, 12 signal conditioning circuit, 2 microprocessor module, 3 wireless bluetooth communication module, 4 system power module.
Detailed Description
Basic structural function
As shown in fig. 1, the utility model discloses a pulse signal gathers transmission experimental system mainly includes pulse signal acquisition module 1, microprocessor module 2, wireless bluetooth communication module 3 and system power module 4, and pulse signal acquisition module links to each other with microprocessor module, and microprocessor module links to each other with wireless bluetooth communication module, and system power module links to each other and provides the power for it with other three modules respectively. The pulse signal acquisition module comprises three pulse sensors 3 and a signal conditioning circuit 12. The signal conditioning circuit mainly comprises an impedance converter, a 20HZ low-pass filter, a first-stage amplifying and filtering circuit, a second-stage amplifying and filtering circuit, a low-pass filter and an amplifying circuit.
The pulse signal acquisition module adopts three common pulse sensors to realize the pulse signal acquisition of three different modes, including piezoelectric film pulse sensor, penetrating infrared pulse sensor and reflecting infrared pulse sensor. The piezoelectric film pulse sensor is connected with the microprocessor module through the impedance converter, the 20HZ low-pass filter and the secondary amplification filter circuit, the penetrating infrared pulse sensor is connected with the microprocessor module through the primary amplification filter circuit and the secondary amplification filter circuit, and the reflecting infrared pulse sensor is connected with the microprocessor module through the low-pass filter and the amplification circuit. Wherein,
the piezoelectric film pulse sensor (called piezoelectric film sensor for short) adopts the model of SDT 1-028K. The signal output by the sensor is first passed through an impedance transformer. The impedance transformer is composed of a piezoelectric injection follower with impedance value of 10M ohm, and can change the high output impedance of the piezoelectric sensor into low output impedance. The input signal is impedance-changed and then sent to an active second-order filter for filtering, and the cut-off frequency of the filter is 20 HZ. The filtered signal is input into a filtering and amplifying circuit, the circuit realizes the functions of filtering and signal amplifying, the circuit adopts a single power supply for power supply, and comprises a first-order passive high-pass filter with the cut-off frequency of 0.5HZ and a first-order active low-pass filter with the cut-off frequency of 20HZ, and the equidirectional amplification factor is 40 times.
The penetration infrared sensor adopts HRM-2104 type correlation infrared transmitting and receiving sensor. The signal output by the sensor is transmitted to the microprocessor module after passing through the signal conditioning circuit. The signal conditioning circuit comprises two stages of amplifying and filtering circuits, and the circuit structures of the two stages of amplifying and filtering circuits are the same. The amplifying and filtering circuit is powered by a single power supply and comprises a first-order passive high-pass filter with the cut-off frequency of 0.5HZ and a first-order active low-pass filter with the cut-off frequency of 20HZ, and the equidirectional amplification factor is 40 times.
The reflective sensor employs a PulseSensor module. The amplification circuit and the sensor core components of the module are integrated on a single, separate circuit board. The transmitting tube of the sensor adopts a green light emitting diode AM2520ZGC09 with the wavelength of 525nm, and the receiving tube is a photosensitive element with the model number of APDS-9008. The collected signals are filtered by a low-pass filter and then amplified by 331 times by an amplifying circuit consisting of the operational amplifier MCP 6001.
The minimum system circuit of the singlechip in the microprocessor module mainly comprises an MCU chip, and the MCU chip is respectively connected with a crystal oscillator circuit, a reset circuit, a buzzer circuit, an independent key circuit, an LED display circuit, a download circuit and a matrix key circuit; the MCU chip is an enhanced 51-core singlechip STC12C5A60S2 model. The microprocessor module receives the signals output by the pulse signal acquisition module, converts the signals into digital signals and sends the digital signals to the wireless Bluetooth communication module.
The wireless Bluetooth communication module adopts a 2.0 standard HC-05 mode Bluetooth serial port module, and the module supports a very wide baud rate range: 4800 ~ 1382400 to the module is compatible 5V or 3.3V's singlechip system, can pass through the bluetooth with the pulse signal of gathering and send to the PC.
The modules are integrated on one board, and the integrated board is connected with a PC through a wireless Bluetooth communication module.
Specific working process
The pulse signal acquisition module is provided with three sensors, and the piezoelectric film pulse sensor is attached to the wrist when acquiring pressure pulse waves; when collecting the photoplethysmography, the penetrating infrared sensor is sleeved at the finger tip, or the reflecting infrared sensor is tied at the finger tip. The electrode plate of the piezoelectric film is contacted with the wrist of a human body or the infrared transmitting and receiving tube is contacted with the finger, so that the fluctuation condition of the pulse wave is converted into an electric signal. The collected pulse waves are amplified and filtered by a signal conditioning circuit and then transmitted to an STC12C5A60S2 singlechip. And an AD module carried by the STC12C5A60S2 singlechip converts the received original pulse wave signals into digital signals. The STC12C5A60S2 singlechip controls the wireless Bluetooth communication module to reduce the digital pulse wave and transmit the digital pulse wave to data terminal equipment such as a PC (personal computer) or a mobile phone. The acquired signals can be displayed and analyzed on the data terminal equipment.
Claims (5)
1. A pulse signal acquisition and transmission experiment system is characterized by mainly comprising a pulse signal acquisition module, a microprocessor module, a wireless Bluetooth communication module and a system power module, wherein the pulse signal acquisition module is connected with the microprocessor module, the microprocessor module is connected with the wireless Bluetooth communication module, and the system power module is respectively connected with other three modules and provides power for the other three modules; the pulse signal acquisition module comprises three pulse sensors and a signal conditioning circuit; the pulse signal acquisition module comprises a piezoelectric film pulse sensor, a penetrating infrared pulse sensor and a reflecting infrared pulse sensor.
2. The pulse signal acquisition and transmission experimental system as claimed in claim 1, wherein: the signal conditioning circuit mainly comprises an impedance converter, a 20HZ low-pass filter, a primary amplifying and filtering circuit, a secondary amplifying and filtering circuit, a low-pass filter and an amplifying circuit; the piezoelectric film pulse sensor is connected with the microprocessor module through the impedance converter, the 20HZ low-pass filter and the secondary amplification filter circuit, the penetrating infrared pulse sensor is connected with the microprocessor module through the primary amplification filter circuit and the secondary amplification filter circuit, and the reflecting infrared pulse sensor is connected with the microprocessor module through the low-pass filter and the amplification circuit.
3. The pulse signal acquisition and transmission experimental system as claimed in claim 2, wherein: the microprocessor module mainly comprises an MCU chip, and the MCU chip is respectively connected with a crystal oscillator circuit, a reset circuit, a buzzer circuit, an independent key circuit, an LED display circuit, a download circuit and a matrix key circuit.
4. The pulse signal acquisition and transmission experimental system as claimed in claim 3, wherein: the penetrating infrared pulse sensor adopts an HRM-2104 model correlation type infrared transmitting and receiving sensor; the piezoelectric film pulse sensor adopts an SDT1-028K type sensor; the reflective infrared pulse sensor adopts a pulseSensor module; the wireless Bluetooth communication module adopts a 2.0 standard HC-05 mode Bluetooth serial port module.
5. The pulse signal acquisition and transmission experimental system as claimed in claim 4, wherein: the impedance converter is composed of a voltage level follower of 10M ohm; the second-order amplification filtering circuit comprises a first-order passive high-pass filter with the cut-off frequency of 0.5HZ and a first-order active low-pass filter with the cut-off frequency of 20 HZ; the MCU chip is an enhanced 51-core singlechip STC12C5A60S2 model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720721557.3U CN208129994U (en) | 2017-06-20 | 2017-06-20 | Pulse signal acquires Transmission System |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720721557.3U CN208129994U (en) | 2017-06-20 | 2017-06-20 | Pulse signal acquires Transmission System |
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| CN208129994U true CN208129994U (en) | 2018-11-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107818721A (en) * | 2017-11-30 | 2018-03-20 | 广西医科大学 | Pulse signal gathers Transmission System |
| CN112891728A (en) * | 2021-02-26 | 2021-06-04 | 佛山科学技术学院 | Self-adaptive control blood pump supply system and method |
-
2017
- 2017-06-20 CN CN201720721557.3U patent/CN208129994U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107818721A (en) * | 2017-11-30 | 2018-03-20 | 广西医科大学 | Pulse signal gathers Transmission System |
| CN112891728A (en) * | 2021-02-26 | 2021-06-04 | 佛山科学技术学院 | Self-adaptive control blood pump supply system and method |
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