CN101672689A - Weighing system and weighing method thereof - Google Patents

Abstract

The invention relates to a weighing system and a weighing method thereof. The weighing system comprises a weighing sensor and a display unit, and is characterized by also comprising a tilt angle sensor and a weighing processing unit, wherein the tilt angle sensor is used for measuring an included angle of a mounting surface of the weighing sensor deflecting from the horizontal plane; and the weighing processing unit is used for calculating the actual weight of a heavy object to be weighed by acquiring a signal output by the weighing sensor and a signal output by the tilt angle sensor, and displaying the actual weight of the heavy object to be weighed through the display unit. Compared with the prior art, the weighing system and the weighing method have the following advantages that: when the mounting surface of the weighing sensor is not even, the actual weight of the heavy object to be weighed can be acquired by acquiring the included angle of the mounting surface of the weighing sensor deflecting from the horizontal plane and complementing the weight measured by the weighing sensor; and the weighing system has high precision and steady work, and can be applied to the occasion that the mounting environment of the weighing sensor is not even and the occasion that the mounting environment is variable, for example, a garbage truck weighing system can effectively solve the error caused by uneven mounting of the weighing sensor.

Description

A kind of weighing system and Weighing method thereof

Technical field

The present invention relates to a kind of weighing system and Weighing method thereof.

Background technology

In weighing system is in the past used, usually occurring because of LOAD CELLS injustice being installed causes the LOAD CELLS measured value to depart from the actual value of weight, thereby the bigger or inaccurate phenomenon of weighing system measuring error appears, this be because, when weighing, the gravity of weight all is straight down, this power straight down just that LOAD CELLS will be measured, require the LOAD CELLS level to install in the time of installation, if the LOAD CELLS installed surface is not on the surface level, the weight of the force rate weight reality of LOAD CELLS measurement at this moment is little, by analysis, this ergometry is that the weight of weight reality takes advantage of the LOAD CELLS installed surface to depart from the cosine value of horizontal plane angle in fact.

Summary of the invention

First technical matters to be solved by this invention is to provide a kind of weighing system that can also accurately not measure weight weight to be measured when the LOAD CELLS installed surface at ordinary times at above-mentioned prior art.

Second technical matters to be solved by this invention provides a kind of Weighing method that can also accurately not measure the weighing system of weight weight to be measured when the LOAD CELLS installed surface at ordinary times.

The present invention solves the technical scheme that above-mentioned first technical matters adopts: this weighing system comprises:

One LOAD CELLS,

One is used for showing the display unit of weight of weighing,

It is characterized in that: also include:

One obliquity sensor, the installed surface that is used for measuring LOAD CELLS departs from the angle of surface level;

One processing unit of weighing, the output terminal of described LOAD CELLS links to each other with the first input end of this processing unit of weighing, the output terminal of described obliquity sensor links to each other with second input end of this processing unit of weighing, and the output terminal of this processing unit of weighing links to each other with display unit; This processing unit of weighing passes through the actual weight of the signal and the calculated signals thing to be weighed that obliquity sensor is exported of the output of collection LOAD CELLS, and the actual weight of thing to be weighed is shown by display unit.

Further improve, the described processing unit of weighing includes a low-pass filtering treatment module, an one A/D modular converter and a single chip processing module, the first input end of described single chip processing module links to each other with described LOAD CELLS as the first input end of the described processing unit of weighing, the input end of described low-pass filtering treatment module links to each other with described obliquity sensor as second input end of the described processing unit of weighing, the output terminal of described low-pass filtering treatment module links to each other with the input end of described A/D modular converter, the output terminal of described A/D modular converter links to each other with second input end of described single chip processing module, and the output terminal of described single chip processing module is the output terminal of the described processing unit of weighing.

The present invention solves above-mentioned second technical scheme that technical matters adopted: described weighing system comprises a LOAD CELLS, one is used for showing the display unit of weight of weighing, it is characterized in that: also include: the installed surface that is used for measuring LOAD CELLS departs from the obliquity sensor and the processing unit of weighing of the angle of surface level, the output terminal of described LOAD CELLS links to each other with the first input end of this processing unit of weighing, the output terminal of described obliquity sensor links to each other with second input end of this processing unit of weighing, and the output terminal of this processing unit of weighing links to each other with display unit; The Weighing method of this weighing system may further comprise the steps:

(1), the described processing unit of weighing gathers the measurement gravity of the weight to be measured that LOAD CELLS measures, and the described processing unit of the weighing installed surface of gathering the LOAD CELLS that obliquity sensor measures departs from the angle of surface level;

(2), the measurement gravity of the weight to be measured that will gather of the described processing unit of the weighing cosine value that departs from the angle of surface level divided by the installed surface of LOAD CELLS obtains the A/W of weight to be measured;

(3), the described processing unit of weighing divided by acceleration of gravity, obtains the actual weight of weight to be measured with the A/W of weight to be measured.

Concrete, described obliquity sensor is a double-axel acceleration sensor, the data that described obliquity sensor is measured are the inclination angle value that the installed surface of LOAD CELLS departs from the surface level X-axis and Y-axis in the three-dimensional system of coordinate, and the cosine value that the installed surface of the middle LOAD CELLS of described step (2) departs from the angle γ of surface level calculates in the following manner:

$\cos \mathrm{\&gamma;}=\left|\frac{\cos \mathrm{\&alpha;}\cos \mathrm{\&beta;}}{\sqrt{1-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="A2008101210000007H2.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&alpha;}{\sin }^2\mathrm{\&beta;}}}\right|$

In the following formula, cos γ is the cosine value that the installed surface of LOAD CELLS departs from the angle of surface level, and α, β represent to tilt that the installed surface of back LOAD CELLS departs from the surface level inclination angle value of X-axis and Y-axis in the three-dimensional system of coordinate.

Compared with prior art, the invention has the advantages that: when the LOAD CELLS installed surface not at ordinary times, the angle that departs from surface level by the installed surface of gathering LOAD CELLS, the gravity that LOAD CELLS is measured replenishes, can obtain the weight of weight reality to be measured, weighing system precision height of the present invention, working stability, can be applied to the occasion and the variable occasion of installation environment of LOAD CELLS self installation environment injustice, as the garbage truck weighing system, effectively solve LOAD CELLS and install uneven and error that cause.

Description of drawings

Fig. 1 is that the circuit of weighing system in the embodiment of the invention connects block diagram;

Fig. 2 is the physical circuit figure of Fig. 1;

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

Weighing system as shown in Figure 1 comprises LOAD CELLS 1, obliquity sensor 2, display unit 3, the processing unit 4 of weighing, wherein, the installed surface that obliquity sensor 2 is used for measuring LOAD CELLS departs from the angle of surface level, and display unit 3 is used for showing weight of heavy to be measured.The processing unit 4 of weighing includes low-pass filtering treatment module 41, A/D modular converter 42 and single chip processing module 43, wherein the first input end of single chip processing module 43 links to each other with LOAD CELLS 1 as the first input end of the processing unit 4 of weighing, the input end of low-pass filtering treatment module 41 links to each other with obliquity sensor 2 as second input end of the processing unit 4 of weighing, the output terminal of low-pass filtering treatment module 41 links to each other with the input end of A/D modular converter 42, the output terminal of A/D modular converter 42 links to each other with second input end of single chip processing module 43, and the output terminal of single chip processing module 43 is that the weigh output terminal of processing unit links to each other with display unit 3.Here, the processing unit 4 of weighing passes through the actual weight of the signal and the calculated signals thing to be weighed that obliquity sensor is exported of the output of collection LOAD CELLS, and the actual weight of thing to be weighed is shown by display unit.

In the present embodiment, LOAD CELLS 1 adopts conventional LOAD CELLS, it is the double-axel acceleration sensor of SCA610T that obliquity sensor 2 adopts the model of VTITechnologies company, display unit 3 can adopt external panel board or external PC etc., the low-pass filtering treatment module 41 in the processing unit 4, A/D modular converter 42 of weighing all adopts custom circuit, and it is the singlechip microprocessor U of AT89C8051 that single chip processing module 43 then adopts model.

Wherein, the 12nd pin of singlechip microprocessor U links to each other with LOAD CELLS 1, the 1st, 2,7,8,9,10,27,28 pins of singlechip microprocessor U link to each other with display unit 3, and 23,24,25,26 pins of singlechip microprocessor U link to each other with the output terminal of A/D modular converter 42.

The present invention also provides a kind of Weighing method on the basis of above-mentioned weighing system, this Weighing method may further comprise the steps:

(1), the processing unit of weighing gathers the measurement gravity of the weight to be measured that LOAD CELLS measures, and the processing unit of the weighing installed surface of gathering the LOAD CELLS that obliquity sensor measures departs from the angle of surface level;

(2), weigh cosine value that the measurement gravity of the weight to be measured that processing unit will gather departs from the angle of surface level divided by the installed surface of LOAD CELLS obtains the A/W of weight to be measured;

(3), the processing unit of weighing divided by acceleration of gravity, obtains the actual weight of weight to be measured with the A/W of weight to be measured.

When obliquity sensor is double-axel acceleration sensor, the data that obliquity sensor is measured are the inclination angle value that the installed surface of LOAD CELLS departs from the surface level X-axis and Y-axis in the three-dimensional system of coordinate, and at this moment the installed surface of the middle LOAD CELLS of step (2) cosine value that departs from the angle γ of surface level calculates in the following manner:

$\cos \mathrm{\&gamma;}=\left|\frac{\cos \mathrm{\&alpha;}\cos \mathrm{\&beta;}}{\sqrt{1-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="A2008101210000007H2.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&alpha;}{\sin }^2\mathrm{\&beta;}}}\right|$

In the following formula, cos γ is the cosine value that the installed surface of LOAD CELLS departs from the angle of surface level, and α, β represent to tilt that the installed surface of back LOAD CELLS departs from the surface level inclination angle value of X-axis and Y-axis in the three-dimensional system of coordinate.

Claims (4)

1, a kind of weighing system comprises:

One LOAD CELLS,

One is used for showing the display unit of weight of weighing,

It is characterized in that: also include:

One obliquity sensor, the installed surface that is used for measuring LOAD CELLS departs from the angle of surface level;

One processing unit of weighing, the output terminal of described LOAD CELLS links to each other with the first input end of this processing unit of weighing, the output terminal of described obliquity sensor links to each other with second input end of this processing unit of weighing, and the output terminal of this processing unit of weighing links to each other with display unit; This processing unit of weighing passes through the actual weight of the signal and the calculated signals thing to be weighed that obliquity sensor is exported of the output of collection LOAD CELLS, and the actual weight of thing to be weighed is shown by display unit.

2, weighing system according to claim 1, it is characterized in that: the described processing unit of weighing includes a low-pass filtering treatment module, an one A/D modular converter and a single chip processing module, the first input end of described single chip processing module links to each other with described LOAD CELLS as the first input end of the described processing unit of weighing, the input end of described low-pass filtering treatment module links to each other with described obliquity sensor as second input end of the described processing unit of weighing, the output terminal of described low-pass filtering treatment module links to each other with the input end of described A/D modular converter, the output terminal of described A/D modular converter links to each other with second input end of described single chip processing module, and the output terminal of described single chip processing module is the output terminal of the described processing unit of weighing.

3, a kind of Weighing method of weighing system, described weighing system comprises a LOAD CELLS, one is used for showing the display unit of weight of weighing, it is characterized in that: also include: the installed surface that is used for measuring LOAD CELLS departs from the obliquity sensor and the processing unit of weighing of the angle of surface level, the output terminal of described LOAD CELLS links to each other with the first input end of this processing unit of weighing, the output terminal of described obliquity sensor links to each other with second input end of this processing unit of weighing, and the output terminal of this processing unit of weighing links to each other with display unit; The Weighing method of this weighing system may further comprise the steps:

(1), the described processing unit of weighing gathers the measurement gravity of the weight to be measured that LOAD CELLS measures, and the described processing unit of the weighing installed surface of gathering the LOAD CELLS that obliquity sensor measures departs from the angle of surface level;

(2), the measurement gravity of the weight to be measured that will gather of the described processing unit of the weighing cosine value that departs from the angle of surface level divided by the installed surface of LOAD CELLS obtains the A/W of weight to be measured;

(3), the described processing unit of weighing divided by acceleration of gravity, obtains the actual weight of weight to be measured with the A/W of weight to be measured.

4, the Weighing method of weighing system according to claim 3, it is characterized in that: described obliquity sensor is a double-axel acceleration sensor, the data that described obliquity sensor is measured are the inclination angle value that the installed surface of LOAD CELLS departs from the surface level X-axis and Y-axis in the three-dimensional system of coordinate, and the cosine value that the installed surface of the middle LOAD CELLS of described step (2) departs from the angle γ of surface level calculates in the following manner:

$\cos \mathrm{\&gamma;}=\left|\frac{\cos \mathrm{\&alpha;\&beta;}\cos }{\sqrt{1-{\sin }^2\mathrm{\&alpha;}{\sin }^2\mathrm{\&beta;}}}\right|$

In the following formula, cos γ is the cosine value that the installed surface of LOAD CELLS departs from the angle of surface level, and α, β represent to tilt that the installed surface of back LOAD CELLS departs from the surface level inclination angle value of X-axis and Y-axis in the three-dimensional system of coordinate.

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