阅读说明：本技术 透射式黑白密度计的误差校准方法 (Error calibration method of transmission type black-white densimeter ) 是由 陈亚利 董峰 徐文青 王宁 于 2020-04-28 设计创作，主要内容包括：本发明属于一种校准方法,具体涉及一种透射式黑白密度计的误差校准方法。本发明较传统密度计,具有读数准确、稳定性好、操作方便等一系列优点,可现场由使用人员快捷方便的根据标准密度片进行调校,无需返厂,大大提高了工作效率。(The invention belongs to a calibration method, and particularly relates to an error calibration method of a transmission type black-and-white densimeter. Compared with the traditional densimeter, the densimeter has the advantages of accurate reading, good stability, convenient operation and the like, can be quickly and conveniently calibrated on site by a user according to the standard density sheet without returning to a factory, and greatly improves the working efficiency.)

1. A method of error calibration of a transmissive black-and-white densitometer, comprising the steps of:

s1: detecting detection points on the standard density sheet one by using a transmission type black-and-white densimeter, and recording the detected numerical value;

s2: comparing the detected value with the value on the standard density sheet, and recording the detection point with an error;

s3: operating an operation panel on the transmission type black-white densimeter, and pressing a menu key to carry out a calibration mode;

s4: after the calibration interface is performed, the error points recorded in S2 are detected again, and the measured value and the standard value are displayed on the display screen, where the measured value is the value actually measured by the current instrument, and the standard value is the value to be corrected, and for the convenience of calibration by the user, the standard value is preset as the measured value, and the standard value and the measured value are the same;

s5: the operation panel is provided with a plus key and a minus key, the plus key and the minus key are used for correcting the standard value, the standard value is corrected to be consistent with the corresponding numerical value on the standard density sheet, the minimum detection unit of the transmission type black-white densimeter is 0.01, and the plus key and the minus key are increased or decreased by 0.01 every time the key is pressed once;

s6: after finishing the correction, pressing the menu key again, exiting the calibration interface, simultaneously calculating the calibration point to obtain the correction coefficient, and obtaining the correction coefficient in the optical density formula D-log₁₀(Φ₀/Φ_r) On the basis of the software calibration, compensation is carried out so as to realize software calibration;

the specific calculation formula of the correction coefficient is as follows: correction factor slope + offset

S7, automatically storing the calibration data in a pre-allocated EEPROM (read-write memory) or a rewritable F L ASH by software;

s8: during the specific measurement process of the transmission type black-white densimeter, the instrument automatically calls the calibrated parameters, corrects the measured value and finally displays an accurate reading on a display screen.

2. The method for calibrating errors of a transmissive black-and-white densitometer according to claim 1, wherein the calculation formula of the correction coefficient mentioned at S6 is specifically explained as follows:

let the standard value at point A be A0, the standard value at point B be B0, the measured value at point A be A1, and the measured value at point B be B1. The correction coefficient X is ((B0-B1) - (a 0-a 1))/((B0-a 0) × 100)) + (a 0-a 1), where a point a to a point B are a calibration interval.

3. The method for calibrating errors of a transmissive black-and-white densitometer according to claim 1 or 2, wherein the calibration points mentioned at S6 are calculated to obtain correction coefficients, specifically: the calculation of the correction coefficient is performed for all the adjacent two calibration points as the calibration interval.

Technical Field

The invention belongs to a calibration method, and particularly relates to an error calibration method of a transmission type black-and-white densimeter.

Background

A transmission-type black-white densimeter (hereinafter referred to as densimeter) is a precision measuring instrument, is used in industries such as safety detection and the like, and has higher requirement on reliability. Each densimeter is provided with a standard density sheet with a metering certificate, and the densimeter is verified by using the standard density sheet when the densimeter is used.

When the density meter fails to be calibrated, the density meter generally needs to return to the factory for calibration. If the engineering unit does not have a spare densimeter, the work can be suspended, the engineering progress is influenced, and the loss is generated.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides an error calibration method of a transmission type black-and-white densimeter, which can be used for on-site calibration and does not need to return to a factory, so that the working efficiency is greatly improved.

The invention comprises the following method steps:

s1: detecting detection points on the standard density sheet one by using a transmission type black-and-white densimeter, and recording the detected numerical value;

s2: comparing the detected value with the value on the standard density sheet, and recording the detection point with an error;

s3: operating an operation panel on the transmission type black-white densimeter, and pressing a menu key to carry out a calibration mode;

s4: after the calibration interface is performed, the error points recorded in S2 are detected again, and the measured value and the standard value are displayed on the display screen, where the measured value is the value actually measured by the current instrument, and the standard value is the value to be corrected, and for the convenience of calibration by the user, the standard value is preset as the measured value, and the standard value and the measured value are the same;

s5: the operation panel is provided with a plus key and a minus key, the plus key and the minus key are used for correcting the standard value, the standard value is corrected to be consistent with the corresponding numerical value on the standard density sheet, the minimum detection unit of the transmission type black-white densimeter is 0.01, and the plus key and the minus key are increased or decreased by 0.01 every time the key is pressed once;

s6: after finishing the correction, pressing the menu key again, exiting the calibration interface, simultaneously calculating the calibration point to obtain the correction coefficient, and obtaining the correction coefficient in the optical density formula D-log₁₀(Φ₀/Φ_r) On the basis of the software calibration, compensation is carried out so as to realize software calibration;

the specific calculation formula of the correction coefficient is as follows: correction factor slope + offset

S7, automatically storing the calibration data in a pre-allocated EEPROM (read-write memory) or a rewritable F L ASH by software;

s8: during the specific measurement process of the transmission type black-white densimeter, the instrument automatically calls the calibrated parameters, corrects the measured value and finally displays an accurate reading on a display screen.

Compared with the traditional densimeter, the densimeter has the advantages of accurate reading, good stability, convenient operation and the like, can be quickly and conveniently calibrated on site by a user according to the standard density sheet without returning to a factory, and greatly improves the working efficiency.

Further preferably, the calculation formula of the correction coefficient mentioned at S6 is specifically explained as follows:

let the standard value at point A be A0, the standard value at point B be B0, the measured value at point A be A1, and the measured value at point B be B1. The correction coefficient X ═ ((B0-B1) - (a 0-a 1))/((B0-a 0) × 100)) + (a 0-a 1), where a point a to a point B are a calibration interval;

further preferably, the correction coefficient is calculated at the point of calibration mentioned in S6, specifically: the calculation of the correction factor is performed for all the two adjacent calibration points as the calibration interval,

compared with the prior art, the invention has the beneficial effects that:

compared with the traditional densimeter, the densimeter has the advantages of accurate reading, good stability, convenient operation and the like, can be quickly and conveniently calibrated on site by a user according to the standard density sheet without returning to a factory, and greatly improves the working efficiency.

Drawings

FIG. 1 is a block flow diagram of the present invention.

Detailed Description

The following further describes the embodiments of the present invention with reference to the drawings.

As shown in fig. one, the present invention comprises the following method steps:

s1: detecting detection points on the standard density sheet one by using a transmission type black-and-white densimeter, and recording the detected numerical value;

s2: comparing the detected value with the value on the standard density sheet, and recording the detection point with an error;

s3: operating an operation panel on the transmission type black-white densimeter, and pressing a menu key to carry out a calibration mode;

s4: after the calibration interface is performed, the error points recorded in S2 are detected again, and the measured value and the standard value are displayed on the display screen, where the measured value is the value actually measured by the current instrument, and the standard value is the value to be corrected, and for the convenience of calibration by the user, the standard value is preset as the measured value, and the standard value and the measured value are the same;

s5: the operation panel is provided with a plus key and a minus key, the plus key and the minus key are used for correcting the standard value, the standard value is corrected to be consistent with the corresponding numerical value on the standard density sheet, the minimum detection unit of the transmission type black-white densimeter is 0.01, the plus key and the minus key are increased or reduced by 0.01 every time, and according to the requirement of detection precision, the error of 0.01 does not need to be corrected sometimes, and the error of 0.01 also needs to be corrected sometimes;

s6: after finishing the correction, pressing the menu key again, exiting the calibration interface, and simultaneously calculating the correction coefficient by taking all the two adjacent calibration points as the calibration interval, wherein the formula D of the optical density is log₁₀(Φ₀/Φ_r) On the basis of the software calibration, compensation is carried out so as to realize software calibration;

the specific calculation formula of the correction coefficient is as follows: the correction factor is slope + offset, and the calculation formula is specifically explained as: let the standard value at point A be A0, the standard value at point B be B0, the measured value at point A be A1, and the measured value at point B be B1. The correction coefficient X is ((B0-B1) - (a 0-a 1))/((B0-a 0) × 100)) + (a 0-a 1), where point a to point B are a calibration interval, and point a is automatically set to zero 0.00 when only a single point B is calibrated;

s7, automatically storing the calibration data in a pre-allocated EEPROM (read-write memory) or a rewritable F L ASH by software;

s8: during the specific measurement process of the transmission type black-white densimeter, the instrument automatically calls the calibrated parameters, corrects the measured value and finally displays an accurate reading on a display screen.

In addition, in order to realize the software function, in the hardware part, the traditional transmission type black-and-white densitometer selects L ED digital tube display number or L CD field screen (field code liquid crystal screen), which is not suitable for the hardware part.