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Granular measuring device and in-situ measuring method thereof

A measuring device and in-situ measurement technology, applied in the direction of analyzing materials, instruments, etc., to achieve the effect of expanding the applicable surface

Inactive Publication Date: 2006-12-13
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, these indirect measurement methods have certain limitations.

Method used

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  • Granular measuring device and in-situ measuring method thereof
  • Granular measuring device and in-situ measuring method thereof
  • Granular measuring device and in-situ measuring method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: A granular measuring device based on an external storage device of an acceleration sensor.

[0028] Taking the granular measurement device based on the acceleration sensor as an example, the sensor 2 adopts MMA7260Q, and the storage device 5 adopts an external computer, such as figure 2 shown. The analog output signal of the acceleration sensor is converted into a digital signal by the microprocessor 3 (chip model: HC908KX8), and the digital signal is connected to the computer through the communication device 4, that is, through the RS232 serial port. Wherein the acceleration sensor MMA7260Q, the microprocessor HC908KX8, and the RS232 serial port are integrated on a circuit board, and these devices and the system power supply are packaged together in a granular shell 1 with a diameter of 60mm made of stainless steel. In this way, a granular measuring device based on an external storage device of an acceleration sensor is formed.

Embodiment 2

[0029] Embodiment 2: Granular measuring device based on the built-in storage device of the acceleration sensor

[0030] Taking the granular measurement device based on the acceleration sensor as an example, the sensor 2 adopts MMA7260Q, and the storage device 5 adopts an external computer, such as image 3 shown. The analog output signal of the acceleration sensor is converted into a digital signal by the microprocessor 3 (chip model: HC908KX8), and the digital signal is connected to the USB flash memory through the communication device 4 through the USB conversion interface. The acceleration sensor MMA7260Q, the microprocessor HC908KX8, the RS232 serial port, the USB conversion interface, and the USB flash memory are integrated on a circuit board, and these devices and the system power supply are packaged together in a plexiglass granular shell 1 with a diameter of 65 mm. In this way, a granular measurement device built into a storage device based on an acceleration sensor i...

Embodiment 3

[0031] Example 3: In-situ measurement of particle motion based on granular measuring device

[0032] The particle motion measurement experiment was carried out using a particle measurement device based on an acceleration sensor. The granular measuring device is placed in the air for free-fall movement, and the internal acceleration sensor senses the instantaneous acceleration of the device during the free-fall process, and records the instantaneous acceleration into the storage device through the microprocessor and communication equipment. Then read the acceleration of the free fall of the device from the storage device, and then obtain the trajectory of the free fall of the object through the quadratic integration of time, see the result Figure 4 . Among them, "line" represents the curve whose theoretical value is calculated by free fall, and "point" represents the trajectory value obtained by quadratic integration of the acceleration of the particle itself. It can be seen...

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Abstract

Disclosed are a particle type measuring device and an original site measuring method. The device places one or more sensors, microprocessors, the system power and the communicating device in the particle type shell. The particle can sense its own motion and field information. The original site measuring method can be realized by employing the particle type measuring device, which comprises taking the particle device as the researching object, placing it in the field to be researched, sensing and recording the information of its motion and the located field.

Description

technical field [0001] The invention relates to a granular measurement method and device for on-site information of particles, in particular to an in-situ measurement method and device for particle information, and belongs to the technical field of micro-measurement devices. Background technique [0002] The field information of the particle and the measurement of the motion of the particle itself are a basic problem, and the related multiphase flow is a basic problem in process engineering science. At present, the field information where the particles are obtained, such as the concentration field, temperature field, and velocity field, is often obtained indirectly through an external sensor probe. The introduction of such an external field affects the flow and transfer behavior of the particles on the one hand, and cannot reflect the absolute real information of the particle's location in situ. On the other hand, obtaining particle motion information is currently an indire...

Claims

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Application Information

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IPC IPC(8): G01N35/00
Inventor 魏飞张强钱震蒋东黄苍魏小波
Owner TSINGHUA UNIV
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