Universal micro electromechanical system (MEMS) pedometer and step counting method

A system pedometer and micro-electromechanical technology, applied in the direction of instruments, measuring devices, surveying and navigation, etc., can solve the problems of easy damage, low step counting accuracy, and large pedometer size, and achieve strong adaptability and long battery life. Ultra-long, simple and reliable circuit effect

Inactive Publication Date: 2013-06-12
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of the existing pedometers with large volu

Method used

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  • Universal micro electromechanical system (MEMS) pedometer and step counting method
  • Universal micro electromechanical system (MEMS) pedometer and step counting method
  • Universal micro electromechanical system (MEMS) pedometer and step counting method

Examples

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Example Embodiment

[0028] Specific implementation mode 1: the following combination figure 1 To explain this embodiment, the universal MEMS pedometer according to this embodiment is characterized in that it includes a single-chip microcomputer 1, a MEMS three-axis acceleration sensor 2 and a segment liquid crystal display 3.

[0029] Single chip microcomputer 1 includes FIR digital low-pass filter module 1-1, data processing module 1-2 and display control module 1-3,

[0030] The MEMS three-axis acceleration sensor 2 is used to collect the acceleration when the person is walking. The acceleration signal of the MEMS three-axis acceleration sensor 2 is input to the FIR digital low-pass filter module 1-1 through the SPI interface, and the FIR digital low-pass filter module 1- The filter signal output terminal of 1 is connected to the collected data signal input terminal of the data processing module 1-2, the step counting signal output terminal of the data processing module 1-2 is connected to the step c...

Example Embodiment

[0034] Specific implementation manner 2: the following combination figure 1 This embodiment will be described. This embodiment will further explain the first embodiment. This embodiment also includes a battery power supply system 4 and a power monitoring display 5. The battery power supply system 4 is used to provide a single-chip microcomputer 1, a MEMS three-axis acceleration sensor 2 and a segmented liquid crystal The display 3 provides working power, and the power signal output terminal of the battery power supply system 4 is connected to the power signal input terminal of the power monitoring display 5.

[0035] In addition to displaying the power status of the battery-powered system 4, the power monitoring display 5 can also monitor whether the battery-powered system 4 is working normally.

Example Embodiment

[0036] Specific implementation manner 3: This implementation manner further describes the implementation manner 1 or 2, and the model of the single-chip microcomputer 1 in this implementation manner is MSP430.

[0037] The single-chip microcomputer 1 in this embodiment adopts the 16-bit ultra-low-power single-chip MSP430F4152 launched by TI, which has 16KB Flash, 512B RAM and many peripherals, and the current is only 0.9uA in the low-power mode. It has 48 I / O ports and a temperature sensor, as well as a flexible and practical timer. It has 2 USARTs supporting I2C and SPI bus interfaces, which can communicate with the acceleration sensor LIS3DH; it can directly drive up to 144 segments of LCD; and there are 8 channels of 10-bit AD converters to monitor the battery voltage.

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Abstract

The invention discloses a universal micro electromechanical system (MEMS) pedometer and a step counting method, and belongs to the field of electronic step counting technology. The invention aims to solve the problems that conventional pedometers are large in size, low in step counting precision and easily destroyed. A MEMS three-axis acceleration sensor of the universal MEMS pedometer is used for collecting an accelerated speed of a man whose steps are counted during walking; the acceleration signal of the MEMS three-axis acceleration sensor is input to a finite impulse response (FIR) digital low-pass filter module through a serial peripheral interface (SPI); the filtering signal output end of the FIR digital low-pass filter module is connected with a collected data signal input end; a step counting signal output end of a data processing module is connected with a step counting control signal input end of a display control module; and a display control signal output end of the display control module is connected with a display signal input end of a section type liquid crystal display. The step counting method comprises steps of collecting data, detecting peak values, detecting effective axes and determining. The universal MEMS pedometer and the step counting method are used for counting steps.

Description

technical field [0001] The invention relates to a general microelectromechanical system pedometer and a pedometer method, belonging to the technical field of electronic pedometers. Background technique [0002] A pedometer is a monitor that monitors the amount of daily activity, which can motivate people to exercise and enhance their physical fitness. Early pedometers used a weighted mechanical switch to detect steps and had a simple counter. This kind of pedometer was large in size and weight, and the accuracy of step counting was not high and it was easily damaged. With the wide application of single-chip technology and the rapid development of integrated circuit (IC) process technology, the conditions for the application of micro-electro-mechanical systems (MEMS), a new technology, to miniaturized equipment have become more and more mature. The digitization of pacing laid the foundation. [0003] MEMS belongs to the new field of interdisciplinary, and it is a technology...

Claims

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Application Information

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IPC IPC(8): G01C22/00
Inventor 高伟李海军王国臣陈世同王罡于强夏秀玮
Owner HARBIN ENG UNIV
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