CN203263407U - Distance learning physiological signal collection wrist strap achieving Bluetooth transmission - Google Patents

Abstract

The utility model and a remote learning physiological signal collection wristband transmitted by bluetooth comprise a wristband main body, which is provided with a skin temperature collector, a pulse wave detector, a Bluetooth module, a power supply, a skin temperature collector, and a pulse wave The output terminals of the detector are respectively connected with the input terminals of the Bluetooth module, and the power supply is respectively connected with the skin temperature collector, the pulse wave detector and the Bluetooth module to supply power for the skin temperature collector, the pulse wave detector and the Bluetooth module. The remote learning physiological signal collection wristband transmitted by Bluetooth described in the utility model is as easy to use as wearing a watch or a sports wristband. It does not need to go through other professional equipment for measurement, and does not need other operations to realize physiological signal collection. Especially suitable for home users. The USB interface can also conveniently expand the types of physiological signal collection. For example, adding an analog/digital conversion circuit can collect physiological signals such as blood pressure and myoelectricity, which is convenient for expansion.

Description

A remote learning physiological signal acquisition wristband transmitted by bluetooth

technical field

The utility model relates to a physiological signal collection device, in particular to a remote learning physiological signal collection wristband transmitted by bluetooth. the

Background technique

With the maturity and popularization of network technology, distance education has been accepted as a means of lifelong learning. However, the biggest difference between distance education learning and classroom learning is that classroom learning is completed under the supervision of teachers, while The learning of distance education is a kind of independent learning. Because there is no teacher's supervision, plus people's own reasons and environmental factors, it is difficult for the learning effect of distance education to achieve the effect of classroom learning. Some learners are not even able to complete the learning tasks. The biggest flaw is the lack of the role of a teacher. the

The physical pulse and skin temperature of a person's learning state can be divided into three types: when concentrating on learning and concentrating, it shows as a pulse, and the skin temperature is regular and stable, and lasts for a long time; when excited, it shows as a pulse. The pulse becomes faster, the skin temperature rises, and the duration is not easy to be too long; when you are tired from studying, it manifests as distraction, the pulse becomes slower, and the skin temperature drops. Normal average pulse rate is 76 beats/min. the

If a notebook computer plus a professional acquisition device is used to collect physiological signals, it is not only expensive for home users, but also complicated to operate, and it is inconvenient for amateurs to use; and because some notebook computers do not have audio input interfaces and need battery power, the use time will be affected. . the

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a remote learning physiological signal collection wristband for detecting physiological signals such as skin temperature and pulse of students and transmitting them via Bluetooth antenna. the

The technical scheme of the utility model is as follows:

A wristband for remote learning physiological signal collection through Bluetooth transmission, comprising a wristband body, the wristband body is provided with a skin temperature collector, a pulse wave detector, a Bluetooth module, a power supply, the output of the skin temperature collector, and the pulse wave detector The terminals are respectively connected to the input terminals of the Bluetooth module, and the power supply is respectively connected to the skin temperature collector, the pulse wave detector, and the Bluetooth module to supply power for the skin temperature collector, the pulse wave detector, and the Bluetooth module. the

Preferably, the skin temperature collector includes a temperature acquisition conversion circuit and a power amplification circuit, and the output end of the temperature acquisition conversion circuit is connected to the input end of the power amplification circuit. the

Preferably, the temperature acquisition and transformation circuit includes a rectangular wave oscillator, a thermistor temperature sensor, and the thermistor temperature sensor is connected in series with a resistor on the negative pin of the operational amplifier of the rectangular wave oscillator. the

Preferably, the pulse wave detector includes a signal pickup circuit and a signal processing circuit, and the output end of the signal pickup circuit is connected to the input end of the signal processing circuit. the

Preferably, the signal pickup circuit includes a transmissive light-shielding photoelectric sensor, the transmissive light-shielding photoelectric sensor includes an infrared light-emitting diode and a phototransistor, the light of the infrared light-emitting diode is aligned with the photosensitive window of the photosensitive transistor, and the wrist artery to be measured is in the position of the infrared light-emitting diode. , Between phototransistors. the

As preferably, the signal processing circuit includes an impedance transformation circuit, a low-pass filter circuit, an amplifying circuit, and a shaping circuit. The circuits are connected sequentially. the

Preferably, the impedance transformation circuit is a voltage follower. the

Preferably, the bluetooth module includes a bluetooth transmitting circuit, a voltage stabilizing integrated circuit, and a battery charging control integrated circuit. the

Preferably, the power supply includes a rechargeable battery and a USB interface, and the USB interface is connected to the rechargeable battery through a battery charging control integrated circuit for charging the rechargeable battery. the

The beneficial effects of the utility model are as follows:

The remote learning physiological signal collection wristband transmitted by Bluetooth described in the utility model is as easy to use as wearing a watch or a sports wristband. It does not need to go through other professional equipment for measurement, and does not need other operations to realize physiological signal collection. Especially suitable for home users. The USB interface can also conveniently expand the types of physiological signal acquisition. For example, adding an analog/digital conversion circuit can collect physiological signals such as blood pressure and myoelectricity, which is convenient for expansion. the

Description of drawings

Fig. 1 is the structural representation of wristband described in the utility model;

Fig. 2 is a schematic diagram of a circuit frame of the present utility model;

Figure 3 is a schematic diagram of the circuit connection of the skin temperature collector;

Fig. 4 is the circuit connection schematic diagram of pulse wave detector;

Figure 5 is a schematic diagram of the circuit connection of the bluetooth module;

In the figure: 1 is the main body of the wristband, 2 is the USB interface, 3 is the skin temperature collector, 4 is the pulse wave detector, 5 is the Bluetooth module, 6 is the power supply, 7 is the rechargeable battery, 8 is the computer Bluetooth receiving module, 9 is a computer. the

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. the

As shown in Figure 1, a remote learning physiological signal acquisition wristband transmitted by Bluetooth includes a wristband main body 1, and a skin temperature collector 3, a pulse wave detector 4, a Bluetooth module 5, and a power supply 6 are arranged on the wristband main body 1. . As shown in Figure 2, the output ends of the skin temperature collector 3 and the pulse wave detector 4 are respectively connected to the input ends of the Bluetooth module 5, and the power supply 6 is connected to the skin temperature collector 3, the pulse wave detector 4, and the Bluetooth module 5 respectively , to supply power for the skin temperature collector 3, the pulse wave detector 4, and the Bluetooth module 5. The bluetooth module 5 includes a bluetooth transmitting circuit, a voltage stabilizing integrated circuit, and a battery charging control integrated circuit. The power supply 6 includes a rechargeable battery 7 and a USB interface 2, and the USB interface 2 is connected to the rechargeable battery 7 through a battery charging control integrated circuit for charging the rechargeable battery 7. the

In this embodiment, the rechargeable battery 7 is a 4.3V lithium polymer battery, which can be customized as a sheet type; the skin temperature collector 3 and the pulse wave detector 4, the collected data are output by the antenna of the Bluetooth module 5 through the Bluetooth module 5 ; Input to the computer 9 through the computer bluetooth receiving module 8. In order to prevent the interference of the two-way signal, the temperature is processed into a frequency function signal (horizontal change), and the pulse is processed into an amplitude function signal (vertical change). the

The skin temperature collector includes a temperature acquisition conversion circuit and a power amplification circuit, and the output end of the temperature acquisition conversion circuit is connected with the input end of the power amplification circuit. The temperature acquisition and conversion circuit includes a rectangular wave oscillator, a thermistor temperature sensor, and the thermistor temperature sensor is connected in series with the resistor on the negative pin of the operational amplifier of the rectangular wave oscillator. the

As shown in Figure 3, the skin temperature collector is implemented based on the low-power precision operational amplifier TLV2242, which includes a temperature acquisition conversion circuit and a power amplifier circuit. The temperature acquisition and conversion circuit converts the temperature into a corresponding electrical signal, and the power amplifier circuit processes the electrical signal output by the sensor to meet the acquisition frequency requirements of the computer sound card. the

The temperature acquisition conversion circuit is composed of the operational amplifier A21 and the surrounding resistance-capacitance elements to form a rectangular wave oscillator. The resistance-capacitance elements include resistors R23, R24, R25, R26, Rx, and capacitor C21. The oscillation frequency is determined by R25, Rx, and C21. Rx is a thermistor temperature sensor. When the temperature changes, the resistance of Rx also changes, resulting in a change in frequency. the

The power amplifying circuit is composed of operational amplifier A22 and surrounding resistance-capacitance components, and the resistance-capacitance components include resistors R21 and R22. In fact, the current is amplified to meet the frequency without distortion. the

The pulse wave detector includes a signal pickup circuit and a signal processing circuit, the output end of the signal pickup circuit is connected with the input end of the signal processing circuit. The signal pickup circuit includes a transmission light-shielding photoelectric sensor, which includes an infrared light-emitting diode and a phototransistor. The light of the infrared light-emitting diode is aligned with the photosensitive window of the phototransistor. between. The signal processing circuit includes an impedance transformation circuit, a low-pass filter circuit, an amplification circuit, and a shaping circuit. The input end of the impedance transformation circuit is connected to the output end of the signal pickup circuit, and the impedance transformation circuit, the low-pass filtering circuit, the amplification circuit, and the shaping circuit are connected in sequence. . The impedance transformation circuit is a voltage follower. the

As shown in Figure 4, the pulse wave detector includes a signal pickup circuit and a signal processing circuit. The signal pick-up circuit converts the pulse wave into a corresponding electric signal, and the signal processing circuit processes the electric signal output by the sensor, so as to meet the requirement of computer sound card collection amplitude. the

The signal pick-up circuit adopts infrared light-emitting diode LED and phototransistor VT, and the surrounding resistance-capacitance components to form a transmission light-shielding photoelectric sensor. The resistance-capacitance components include R3l, R32, and R33. The infrared light-emitting diode has good wavelength stability, and the light-shielding device reduces the interference of external light. During the test, the measured wrist artery is just between the infrared light-emitting diode LED and the phototransistor VT, and the light emitted by the infrared light-emitting diode LED is irradiated on the photosensitive window of the phototransistor VT through the human wrist. The light transmittance also changes with it, so the current of the phototransistor VT also fluctuates, and the pulse signal is detected indirectly, thus completing the signal pickup. the

The signal processing circuit is implemented based on the low-power precision operational amplifier TLV2244, including impedance transformation circuit, low-pass filter circuit, amplifier circuit, and shaping circuit. First, the weak signal of the sensor is passed through the impedance transformation circuit to increase its ability to carry the load, and then sent to the low-pass filter circuit to remove the interference signal, and then the signal is further amplified by the first-stage amplifier circuit, and finally a regular rectangular shape can be output by the shaping circuit Wave. the

The impedance transformation circuit includes an operational amplifier A31, a capacitor C31, and resistors R34 and R35. The impedance transformation circuit is a voltage follower, and its main function is to perform impedance transformation and increase the ability of the circuit to carry a load. Its essence is to dynamically amplify the current and then amplify the change of the current of the subsequent stage circuit. the

The low-pass filter circuit includes an operational amplifier A32, capacitors C32 and C33, and resistors R36 and R37. The low-pass filter circuit is a low-pass filter. Since the output signal of the previous stage circuit is relatively weak and there are other high-frequency interferences, it needs to pass through a low-pass filter circuit. the

The amplifying circuit includes operational amplifier A33, resistors R38 and R39. The signal output by the low-pass filter is a weak pulse pressure fluctuation signal, so it needs to pass through a first-stage inverting amplifier. In this embodiment, the amplification factor is 100 times. the

The shaping circuit includes an operational amplifier A34, a capacitor C34, and resistors R310, R311, and R312. Through the charging and discharging process of the non-inverting terminals R310, R311, and C34, various fluctuating signal levels other than the pulse voltage peak output by the previous stage circuit can be maintained at a certain range, ensuring that the square wave is accurately output during the pulse voltage fluctuation period. the

The bluetooth module 5 and the schematic diagram of the bluetooth wireless output circuit are shown in FIG. 5 , the bluetooth module 5 includes a bluetooth transmitting circuit, a voltage stabilizing integrated circuit, and a battery charging control integrated circuit. The bluetooth transmitting circuit is realized based on the bluetooth integrated circuit chip U2 (BC 358239A) and its peripheral circuits. The temperature signal output by the skin temperature collector 3, the pulse signal output by the pulse wave detector 4, and the two-way AC signal are controlled by the bluetooth integrated circuit chip. U2's IN3 and NI4 inputs, and then modulate the AC signal into a 2.4GHz high-frequency signal, which is transmitted and output by the Bluetooth wireless output antenna. the

The voltage stabilizing integrated circuit is implemented based on the voltage stabilizing chip U3 (RT913-18CB). The rechargeable battery 7 is connected to the IV8 of the voltage stabilizing chip U3 to provide a stable voltage for U2. The battery charging control integrated circuit is implemented based on the charging management integrated circuit chip U4 (VA7205DF). The USB interface 2 is connected to the rechargeable battery 7 through the battery charging control integrated circuit for charging the rechargeable battery 7 . the

The specific implementation of the bluetooth module 5 can also be based on the designs of other bluetooth modules, which are not pointed out in the specification of this application. The above-mentioned embodiments are only used to illustrate the utility model, but not to limit the utility model. As long as it is based on the technical essence of the present utility model, changes and modifications to the above-mentioned embodiments will fall within the scope of the claims of the present utility model. the

Claims (9)

1. the distance learning physiological signal of a Bluetooth transmission gathers wrist strap, comprise band body, it is characterized in that, be provided with skin temperature harvester, kymoscope, bluetooth module, power supply on band body, the outfan of skin temperature harvester, kymoscope is connected with the input of bluetooth module respectively, power supply is connected with skin temperature harvester, kymoscope, bluetooth module respectively, is skin temperature harvester, kymoscope, bluetooth module power supply.

2. the distance learning physiological signal of Bluetooth transmission according to claim 1 gathers wrist strap, it is characterized in that, skin temperature harvester comprises temperature acquisition translation circuit, power amplification circuit, and the outfan of temperature acquisition translation circuit is connected with the input of power amplification circuit.

3. the distance learning physiological signal of Bluetooth transmission according to claim 2 gathers wrist strap, it is characterized in that, the temperature acquisition translation circuit comprises square-wave oscillator, thermosensitive resistance type temperature sensor, and the resistance on the negative pole pin of thermosensitive resistance type temperature sensor and the operational amplifier of square-wave oscillator is connected.

4. the distance learning physiological signal of Bluetooth transmission according to claim 1 gathers wrist strap, it is characterized in that, kymoscope comprises signal pickup circuit, signal processing circuit, and the outfan of signal pickup circuit is connected with the input of signal processing circuit.

5. the distance learning physiological signal of Bluetooth transmission according to claim 4 gathers wrist strap, it is characterized in that, signal pickup circuit comprises transmission light shading type photoelectric sensor, transmission light shading type photoelectric sensor comprises infrarede emitting diode, phototriode, the light of infrarede emitting diode is aimed at the photosensitive window of phototriode, and tested wrist tremulous pulse is between infrarede emitting diode, phototriode.

6. the distance learning physiological signal of Bluetooth transmission according to claim 4 gathers wrist strap, it is characterized in that, signal processing circuit comprises impedance inverter circuit, low-pass filter circuit, amplifying circuit, shaping circuit, the input of impedance inverter circuit is connected with the outfan of signal pickup circuit, and impedance inverter circuit, low-pass filter circuit, amplifying circuit, shaping circuit are connected successively.

7. the distance learning physiological signal of Bluetooth transmission according to claim 6 gathers wrist strap, it is characterized in that, impedance inverter circuit is voltage follower.

8. the distance learning physiological signal of Bluetooth transmission according to claim 1 gathers wrist strap, it is characterized in that, bluetooth module comprises Bluetooth transmission circuit, integrated regulator, battery charging control integration circuit.

9. the distance learning physiological signal of Bluetooth transmission according to claim 8 gathers wrist strap, it is characterized in that, power supply comprises rechargeable battery, USB interface, and USB interface is connected with rechargeable battery by the battery control integration circuit that charges, and is used for rechargeable battery is charged.

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