Apparatus and method for measuring relative height

Abstract

The invention discloses a relative height measuring device which comprises a host computer, a microprocessor module, as well as an array type gas pressure sensor module, a power supply module, a liquid crystal display module and a serial port communication module which are respectively connected with the microprocessor module. A measuring method employing the relative height measuring device comprises the following steps: accomplishing a genetic algorithm optimized BP (Back Propagation) neural network in a host computer, transmitting obtained weights, thresholds and relative height calculation equations to the microprocessor module, acquiring gas pressure and temperature through the array type gas pressure sensor module and transmitting the gas pressure and temperature to the microprocessor module, processing the received air pressure and temperature through the microprocessor module so as to obtain the relative height, and transmitting the result to the liquid crystal display module to be displayed and stored in the host computer. With the combination of software and hardware, noise can be suppressed, useful signals can be recovered, enhanced and extracted, and the great precision and stability are achieved.

Description

technical field [0001] The invention relates to a relative height measuring device and method, in particular to a relative height measuring device and method based on a genetic algorithm to optimize a BP neural network. Background technique [0002] In daily life and production process, relative height (the vertical height of any two points in space) is an indispensable basic parameter for us. For example, relative height has a wide range of applications in our life, architecture, technology, and even military Applications, such as field exploration, construction site height measurement, unmanned robot and target missile height navigation, etc. Generally speaking, there are usually three commonly used methods for the measurement of relative altitude, the first one: traditional mechanical direct measurement; the second one: measurement using GPS; the third one: indirect measurement based on air pressure sensing electronic instruments. Traditional mechanical measuring devices...

AI Technical Summary

Problems solved by technology

However, the standard pressure-altitude conversion formula has relatively large defects. For example, when the atmospheric pressure around the measurement point does not meet the ideal standard atmospheric pressure (pressure is 1013.25hPa, temperature is 15°C), the standard pressure-altitude formula is affected by air temperature, wind speed, Humidity and other external factors are greatly affected, resulting in large errors in height measurement

In addition, a single sensor is generally used for measurement. Since the air pressure at a certain point may vary greatly and the factory parameters of the sensor are slightly different, these factors increase the measurement error.

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