KR101734476B1 - Sensor output correction device and Method thereof - Google Patents

Abstract

A sensor output correction apparatus and a correction method are disclosed. The sensor output correction device includes: an input unit for receiving a plurality of sensor output values for sensors of the same type; The sensor output value is measured by using a standard weight of the sensor output value, and an output variation of the sensor with respect to each sensor output value is measured. An individual slope with respect to the measured data of each sensor is calculated and graphed. ; And a storage unit for storing correction data for actual data of the sensor under the control of the control unit. The present invention can extract an accurate result corresponding to the sensor output by correcting the output of the sensor, and correcting the error even if there is an error in the sensor.

Description

[0001] The present invention relates to a sensor output correction device,

The present invention relates to a sensor output correcting apparatus and a correction method, and more particularly, to a sensor output correcting apparatus and a correction method capable of extracting and using an accurate result value corresponding to a sensor output by correcting the sensor output even if there is an error .

Digital information exchange is being actively carried out through the massive supply of PCs and the whole regional construction of Internet cable networks. Accordingly, image input devices such as digital cameras and scanners that digitize analog images, and image output devices such as displays and printers that allow digital images to be viewed visually are becoming commonplace.

In recent years, the emergence of camera phones has made digital images more active. Various sensors are applied to various electronic devices. For example, various sensors such as an image sensor, a weight sensor, a speed sensor, and an acceleration sensor are applied to various devices.

These sensors mainly change the resistance or the current in proportion to the change of the environment or the sensor itself, and output the change value.

Therefore, as the amount of change of the sensor is directly proportional to the change of the environment or the change of the sensor itself, the characteristics are better.

For example, in the case of a weight sensor, it is assumed that the characteristic is linear, and the weight value is calculated using the measured value of the sensor.

However, since the weight sensor actually manufactured has an error, it is difficult to calculate an accurate weight value, and error correction is required.

On the other hand, when the sensor is actually produced, it produces thousands to tens of thousands of masses, and the characteristics of the sensors produced together are similar.

Korea Patent Registration No. 10-1561469 (Registration date: October 13, 2015 Title: Weight deviation correction method for vehicle weight sensor)

An object of the present invention is to provide a sensor output correction device and a correction method capable of correcting an output of a sensor and extracting an accurate result corresponding to a sensor output.

It is another object of the present invention to provide a sensor output correcting apparatus and a correcting method which can extract and use an accurate result corresponding to a sensor output by correcting the error even if there is an error in the sensor.

According to an aspect of the present invention,

An input unit for receiving a plurality of sensor output values for sensors of the same type;

The sensor output value is measured by using a standard weight of the sensor output value, and an output variation of the sensor with respect to each sensor output value is measured. An individual slope with respect to the measured data of each sensor is calculated and graphed. ;

And a storage unit for storing correction data for actual data of the sensor under the control of the control unit.

According to another aspect of the present invention, there is provided an apparatus for correcting sensor output,

An input unit for receiving a sensor output value from the sensor;

A storage unit for storing correction data corresponding to the sensor output value;

And a control unit for recognizing the sensor output value as correction data corresponding to the sensor output value by referring to the storage unit,

Wherein the correction data includes:

The sensor output value is measured by using a standard weight of the sensor output value, and an output variation of the sensor with respect to each sensor output value is measured. An individual slope with respect to the measured data of each sensor is calculated and graphed. Is stored in advance.

According to an aspect of the present invention,

Receiving a plurality of sensor output values for a sensor of the same type;

Measuring an output change amount of the sensor with respect to each sensor output value using a standard weight of the sensor output value;

Calculating an individual slope with respect to actual data of each of the sensors and plotting the individual slopes;

Calculating the correction data for the actual data by modifying the graph;

And storing the correction data for the actual data of the sensor.

According to another aspect of the present invention, there is provided a sensor output correcting method,

Receiving a plurality of sensor output values for a same kind of weight sensor;

The controller divides the interval into 5Kg units, stores the actual data in the form of a lookup table in the storage unit, extracts weights for the variation amounts of the intervals, and stores the extracted weights together;

Estimating a boundary value for each interval by applying the weight for each interval to a max-min value after checking the min and max values through a calibration process;

Calculating each slope with the prediction data and the min and max data;

Extracting a linear function through the data;

And the control unit calculates a predicted value for each slice by a unit value of 1 Kg through the linear function and stores the predicted value in a table of the storage unit.

The embodiment of the present invention can provide a sensor output correcting apparatus and a correcting method which can correct an output of a sensor and extract an accurate result value corresponding to a sensor output.

Also, in the embodiment of the present invention, it is possible to provide a sensor output correcting apparatus and a correcting method which can extract and use an accurate result value corresponding to a sensor output by correcting the sensor output even if there is an error.

1 is a configuration diagram of a sensor output correction apparatus according to an embodiment of the present invention.
6 is a flowchart illustrating a method of calibrating a sensor output according to an embodiment of the present invention.
FIGS. 2 to 5 and FIGS. 7 to 10 are examples of data applied to the sensor output correction method according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

1 is a configuration diagram of a sensor output correction apparatus according to an embodiment of the present invention.

FIGS. 2 to 5 and FIGS. 7 to 10 are examples of data applied to the sensor output correction method according to the embodiment of the present invention.

6 is a flowchart illustrating a method of calibrating a sensor output according to an embodiment of the present invention.

Referring to FIG. 1, a sensor output correction apparatus according to an embodiment of the present invention includes an input unit 110, a control unit 130, and a storage unit 140.

The input unit 110 receives a plurality of sensor output values from the sensor device 200 for the same kind of sensor.

The input unit 110 may include means for inputting information such as a keyboard, a keypad, or a mouse, and may receive the sensor output value from such means.

The control unit 130 measures the amount of change in the output of the sensor with respect to each sensor output value using the standard weight of the sensor output value and calculates and displays an individual slope with respect to the measured data of each sensor, And calculates correction data for the data.

The storage unit 140 stores correction data for the actual data of the sensor under the control of the controller 130. [

And may further include a display unit 120 for displaying information as needed.

The control unit 130 generates correction data according to the following concept, and the concept will be described as follows.

First, the output change amount of the weight sensor with respect to each weight value is measured as shown in FIG. 2 using a standard weight.

Then, an individual slope for each measured data is calculated as shown in FIG.

Next, as shown in FIG. 4, a graph of the individual slope values of each data is generated.

Then, the equation for the slope graph is extracted as shown in Fig.

Here, it is possible to correct the error by applying different slopes for each section through the extracted equation.

When the formula is applied to the measured data, correction data is generated.

In this case, it is also possible to obtain a virtual prediction value in the actual correction, obtain the slope thereof, and then extract the first order function based on the two points.

The operation of the sensor output correction apparatus according to the embodiment of the present invention having such a configuration will now be described.

6 is a flowchart illustrating a method of calibrating a sensor output according to an embodiment of the present invention.

6, the sensor device 200 measures and outputs an output change amount of the weight sensor with respect to each weight value using a standard weight, and the input unit 110 inputs a plurality of sensor output values for the same type of sensor (S210). Here, the weight sensor is explained as an example for convenience, and it is applicable to other kinds of sensors. Such an example is shown in FIG.

Then, the control unit 130 divides the section in units of 5 Kg, stores the actual data in the form of a lookup table in the storage unit 140 as shown in FIG. 7, extracts a weight for the variation per section, (S220).

Here, the use of the actual data is used to grasp the characteristics of the sensor and obtain the weight for each section.

Then, the controller 130 checks the min and max values through a calibration process, and then applies a weight to the (max- min) value to estimate the boundary value for each interval (S230). That is, seven virtual data are obtained through the weights.

ex) level_0 = min value,

      level_1 = Weight [1] * (max - min)

      level_2 = Weight [2] * (max - min)

(max- min) The predicted value according to the level change is shown in Fig.

Next, the slope of each of the seven virtual data and the min and max data obtained in the above process is obtained as shown in FIG. 9 (S240).

Then, as shown in FIG. 10, a linear function such as the above-described 4 is extracted through the slope data of 7 (S250).

  (0.0133392861, 5), (0.0133333333, 40) First-order function extraction through two points

  y = ax + b

  a = (0.0133392861 - 0.0133333333) / (5-40)

  b = 0.0133333333 - (a * 40)

Next, the control unit 130 calculates a predicted value for each slice by the 1-Kg unit level and stores the value in the table of the storage unit 140 (S260). An example of such stored data is shown in Fig.

The correction data thus generated is stored in the storage unit 140. When the actual data is input from the predetermined sensor, the control unit 130 recognizes the correction data corresponding to the actual data. That is, based on the table of FIG. 10, the section of the current output value is predicted and a slope corresponding to the section is applied.

For example, if the output value of the sensor is 10450000

      (10450000 - min) * slope = (10450000-9000000) * 0.013336905 = 19338

      ≒ 19.34 Kg,

The control unit 130 recognizes the measured data as 19.34 Kg.

As described above, after a large number of sensors are generated, correction data is generated for one sensor through the above process, and more accurate sensor data can be obtained by providing a lookup table for the correction data.

That is, the control unit 130 receiving the output of the sensor reads the correction data corresponding to the output of the sensor from the lookup table and recognizes the sensor data with the correction data, so that more accurate sensor data can be obtained.

In the embodiment of the present invention as described above, the output of the sensor can be corrected to extract an accurate result corresponding to the sensor output.

Also, in the embodiment of the present invention, even if there is an error in the sensor, it is corrected and used so that accurate result corresponding to the sensor output can be extracted and used.

The embodiments of the present invention described above are not only implemented by the apparatus and method but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded, The embodiments can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (4)

Receiving a plurality of sensor output values for a sensor of the same type;
The controller divides the interval into 5Kg units, stores the actual data in the form of a lookup table in the storage unit, extracts weights for the variation amounts of the intervals, and stores the extracted weights together;
Estimating boundary values for seven or more intervals by applying the weights to the (max- min) values after confirming the min and max values through the calibration process;
Calculating respective slope data with the predicted boundary value for seven or more intervals and min and max data;
Extracting a linear function through the slope data;
Wherein the controller calculates a 1-Kg level value for each interval and a predicted value of the slope based on the linear function, and stores the predicted value in a table of the storage unit. delete delete An input unit for receiving a plurality of sensor output values for sensors of the same type;
The sensor output value is measured by using a standard weight of the sensor output value, and an output variation of the sensor with respect to each sensor output value is measured. An individual slope with respect to the measured data of each sensor is calculated and graphed. ;
And a storage unit for storing correction data for actual data of the sensor under the control of the control unit,
Wherein,
Receiving a plurality of sensor output values for a sensor of the same type;
Dividing the interval into 5Kg units, storing the actual data in the form of a lookup table in the storage unit, extracting weights for the variation amounts per interval, and storing them together;
Estimating boundary values for seven or more intervals by applying the weights to the (max- min) values after confirming the min and max values through the calibration process;
Calculating respective slope data with the predicted boundary value for seven or more intervals and min and max data;
Extracting a linear function through the slope data;
Wherein the controller performs a step of obtaining a predicted value for a slope by a unit value of 1Kg in units of 1K through the linear function and storing the predicted value in a table of the storage unit.

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