An outdoor sport wristband
A sports bracelet, outdoor technology, applied in bracelets, watch straps, clothing and other directions, can solve the problems of inconvenient carrying of the instrument, limited measurement environment, etc., and achieve the effects of simple structure, good application prospects, and easy portability.
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Embodiment 1
[0015] Such as figure 1 It is a schematic diagram of an outdoor sports wristband of the present invention, including: wristband 1, battery 2, pressure sensor 3, first low-pass filter 4, second low-pass filter 5, analog-to-digital converter 6, processor 7, temperature sensor 8, bluetooth module 9; Wherein, the air inlet hole of pressure sensor 3 and the temperature sensing part of temperature sensor 7 are all exposed on the outer surface of bracelet 1; first low-pass filter 4, second low-pass filter The filter 5, the analog-to-digital converter 6, the processor 7, and the temperature sensor 8 are all inlaid inside the wristband 1; the pressure sensor 3 measures the pressure signal, converts the pressure signal into an analog electrical signal, and outputs it in a differential form Two analog electrical signals; wherein the first analog electrical signal is input to the first low-pass filter 4, and the second analog electrical signal is input to the second low-pass filter 5; the...
Embodiment 2
[0017] On the basis of Embodiment 1, the pressure sensor 3 is an integrated pressure sensor. Here, the US9011-100-8 sensor produced by Shenzhen Lianxingte Sensor Technology Co., Ltd. is selected. The chip is packaged in SOP-8, and the top of the chip is With a 0.76mm aperture, it is inexpensive and easy to use. A constant current source or a constant voltage source can be used for excitation, and a constant voltage source is used for excitation here. The sensor output voltage has a linear relationship with the pressure, and the air pressure can be calculated by measuring the output voltage.
[0018] Described temperature sensor 8 is digital temperature sensor, adopts DS18B20 here; The first low-pass filter 4, the second low-pass filter 5 adopt active filter; Described processor 7 adopts STM32F103 produced by STMicroelectronics A processor, the processor has a flash capacity of 64KB and integrates analog-to-digital conversion and digital-to-analog conversion; the analog-to-dig...
Embodiment 3
[0021] On the basis of Embodiment 1, the pressure sensor 3 is an integrated pressure sensor. Here, the US9011-100-8 sensor produced by Shenzhen Lianxingte Sensor Technology Co., Ltd. is selected. The chip is packaged in SOP-8, and the top of the chip is With a 0.76mm aperture, it is inexpensive and easy to use. A constant current source or a constant voltage source can be used for excitation, and a constant voltage source is used for excitation here. The sensor output voltage has a linear relationship with the pressure, and the air pressure can be calculated by measuring the output voltage.
[0022] The temperature sensor 8 is a platinum resistor, and the temperature is measured by a constant current source; the first low-pass filter 4 and the second low-pass filter 5 are passive filters, and on the premise of meeting the performance requirements, The cost is low and the circuit structure is simple; the processor 7 adopts the STC89C51 processor produced by STC Company. The a...
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