CN112461442A

CN112461442A - Visual and simple pressure gauge verification recording method

Info

Publication number: CN112461442A
Application number: CN202011301057.7A
Authority: CN
Inventors: 王滨
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-03-09

Abstract

The invention provides a visual and simple pressure gauge calibration recording method, which comprises the following steps of recording a pressure value of a standard device, then recording the deviation amount of a pointer deviating from a corresponding graduation line after tapping a meter shell, wherein the deviation amount is an integer and is an integer multiple of the width of the pointer; the normal indication value of the pressure gauge is 3-5 digits of data and decimal points, while the deviation amount is generally single digit, at most 2 digits and no decimal point, so that complicated recording is avoided; the method avoids twice calculation of multi-bit digital data and ensures accurate, rapid and visual recording.

Description

Visual and simple pressure gauge verification recording method

Technical Field

The invention relates to a verification recording method, in particular to a visual and simple pressure gauge verification recording method.

Background

In the metrological verification work, the filling of verification records is an indispensable work and is a basis for judging verification results. Whether the accuracy of filling in the verification record affects the judgment result, whether the filling speed affects the verification work efficiency, and whether the cleanliness of filling affects the verification work quality. When the pressure gauge is calibrated, the indication value calibration part needs to record data such as the indication value, tapping displacement, return error and the like of the pressure gauge to be tested, each working pressure gauge generally has 4-6 calibration points, and a large amount of data needs to be filled. A method for recording the deviation of pointer features that the data is recorded by said method, resulting in less recording workload, less time consumption, high accuracy and high efficiency

Disclosure of Invention

The invention provides a visual and simple pressure gauge verification recording method, which solves the problems that the original recording method needs to fill in a large amount of data of multiple digits and has low efficiency.

In order to solve the technical problems, the invention provides the following technical scheme:

the invention provides a visual and simple pressure gauge verification recording method, which comprises the following specific steps:

the pressure value on the calibration graduation line of the standard instrument is firstly recorded, then the deviation amount of the pointer deviating from the corresponding graduation line is recorded after the pointer is tapped on the watch case, the deviation amount is a negative sign when the pointer is on the left side of the graduation line, the deviation amount is a positive sign when the pointer is on the right side, the deviation amount is 0 when the pointer is on the calibration graduation line, and the recorded deviation amount is used for replacing the indication value of the original recording method.

Preferably, the deviation is an integer multiple of 1/10 of the indexing value of the pressure gauge, and the unit of deviation is called the width of the pointer.

Preferably, the indication is equal to the value of the detected point plus an indication error.

Preferably, the indexing error is 1/10 of the offset multiplied by the index value.

The principle is as follows: the indication value of the detected point and the indication error of the point are in one-to-one correspondence, and similarly, the indication value of the detected point and the deviation of the point are in one-to-one correspondence. Therefore, the indication value may be represented by an indication error or an offset.

Through the technical scheme, the invention has the beneficial effects that: the division value of the pressure gauge is not considered during reading, and the degree and the direction of the pointer deviating from the division line are only considered, so that the calculation process is omitted, and the possibility of calculation errors is avoided; the normal indication value of the pressure gauge is 3-5 digits of data and decimal points, while the deviation amount is generally single digit, at most 2 digits and no decimal point, so that complicated recording is avoided; the invention avoids twice calculation of multi-bit digital data and ensures accurate, rapid and visual recording.

Detailed Description

The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.

The following was used to verify a block of measurement ranges: 0-1MPa, accuracy grade: grade 1.6, division value: a0.02 MPa pressure gauge is taken as an example to compare two recording methods of the value verification part. The maximum allowable error of the pressure gauge is calculated as follows: 0.016MPa (8 finger width).

Table 1 is a notation recording method, in MPa; table 2 shows the offset recording method, in which columns 2 and 3 are replaced with values indicating errors in the table to be examined after tapping, and the unit is represented by 1/10 indicating the division value. The italic data in the table are the data filled in by the verification.

Table 1 shows the value recording method units: MPa of

Table 2 deviation metric units: 1/10 of division value

As can be seen from the 2 tables:

the method comprises the steps of filling 20 four-digit data with 80 digits and 20 decimal points by using an indicating value recording method; only 20 digits and 3 "-" numbers need to be filled in with the offset recording method.

The maximum indication error of the method is obtained by calculation after comparing the 2 nd and 3 rd columns of 9 data with the 1 st column by visual inspection; the deviation amount recording method only needs to find out the data with the maximum absolute value from the 9 data in the 2 nd and 3 rd columns.

And the indication value verification is to judge whether the indication value error, the return stroke error and the tapping displacement of the pressure gauge are qualified or not. The maximum allowable error of the pressure gauge in this example is 0.016MPa (8 pointer widths), and it can be easily determined by converting the maximum allowable error into 8 pointer widths and expressing all three indexes by pointer widths by the offset recording method.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A visual and simple pressure gauge verification recording method is characterized in that a specific recording method comprises the steps of firstly recording a pressure value on a verification point of a standard gauge, then recording the deviation amount of a pointer deviating from a corresponding graduation line after tapping a meter shell, measuring a negative sign of the deviation amount when the pointer is on the left side of the graduation line, measuring a positive sign of the deviation amount when the pointer is on the right side, measuring the deviation amount of 0 when the pointer is on the verification graduation line, and replacing the indication value of the original recording method with the deviation amount.

2. The method for calibrating and recording the pressure gauge, which is intuitive and easy as claimed in claim 1, wherein the deviation is an integer multiple of 1/10 of the division value of the pressure gauge, and the unit of the deviation is called the width of the pointer.

3. The method for calibrating and recording the pressure gauge according to claim 2, wherein the indication value is equal to the value of the calibration point plus an indication error.

4. An intuitive and easy pressure gauge verification recording method as claimed in claim 2, wherein the indication error is 1/10 of deviation multiplied by division value.