CN-119845340-B - Special system instrument value monitoring and adjusting method

CN119845340BCN 119845340 BCN119845340 BCN 119845340BCN-119845340-B

Abstract

The invention belongs to the technical field of instrument monitoring, and particularly relates to a special system instrument value monitoring and adjusting method. The method comprises the following steps of 1, collecting signals of a pressure gauge and a light impurity monitoring instrument, 2, transmitting the signals collected in the step 1 to an operation station, 3, transmitting the signals obtained in the step 2 to a DCS through conversion processing, and 4, increasing trend alarming function of the data of the step 3. The invention provides a remote control zeroing method for a light impurity meter, which can reduce the on-site adjustment frequency of process personnel by monitoring the numerical value change trend of the meter and sending out an early warning signal to ensure the stable operation of the system.

Inventors

YU JIE
CHEN JIEHAO
CHEN XIANGYI
YU JUN
YANG JING
Lu Kaixian
ZHANG HONGCHI
YANG DONG

Assignees

四川红华实业有限公司

Dates

Publication Date: 20260512
Application Date: 20241231

Claims (7)

1. A system instrument value monitoring and adjusting method is characterized by comprising the following steps of 1, collecting signals of a pressure gauge and a light impurity monitoring instrument, 2, transmitting the signals collected in the step 1 to an operation station, 3, transmitting the signals obtained in the step 2 to a DCS through conversion processing, and 4, increasing trend alarming function of the data in the step 3; In the step 3, aiming at the light impurity monitoring instrument in the step 1, the acquired signals are converted into a group of data, the data are real data, and a group of data are added for display on the basis; in the step 3, two paths of signals are respectively set as a display value I, a true value T, an alarm value B and an interlocking value L on a DCS, the fluctuation of the display value I and the true value T is delta I2= (L-4) mA, and when the true value T is smaller than (19-delta I2) mA, the normal operation is realized; The real value T is larger than 6.00mA, the (19-delta I2) mA is smaller than the real value T without on-site zeroing, manual program assignment is carried out, remote control zeroing is carried out when the display value I is slowly increased to 6.0mA according to a rule, an alarm signal is sent when the display value I is quickly increased to be larger than or equal to the alarm value B, and interlocking occurs when the display value I is quickly increased to be larger than or equal to the interlock value L.
2. The system meter value monitoring adjustment method of claim 1, wherein the signals comprise a voltage signal and a current signal.
3. The system meter value monitoring and adjusting method according to claim 1, wherein in the step 3, for the pressure gauge in the step 1, the collected voltage signal is linearly converted into pressure data through a pressure range and a corresponding pressure range.
4. The system meter value monitoring and adjusting method according to claim 3, wherein in the step 3, the added set of data is zeroable data.
5. The system meter value monitoring and adjusting method according to claim 4, wherein the output value is at most 20mA, and a redundancy amount of 1mA is reserved.
6. The system meter value monitoring and adjusting method according to claim 5, wherein in the step 4, for the pressure gauge with the set value, the acquisition time Δt, the real-time value P1, the upper limit Δp of the pressure value fluctuation are set, if the absolute value |p-p1| > Δp of the difference between the set value P and the real-time value P1, a trend alarm signal is sent to remind that an abnormality occurs, abnormal fluctuation occurs, the reason is checked and found, and after the alarm is eliminated, the step 1 is repeated.
7. The method for monitoring and adjusting the system meter value according to claim 6, wherein in the step 4, for the light impurity meter without the set value, the collection time Δt=t2-t 1 is set, the current value fluctuation upper limit Δi is set, the real-time value I1 collected at time t1 and the real-time value I2 collected at time t2 are set, if |i1-i2| > Δi, a trend alarm signal is sent to remind of abnormality, abnormality fluctuation occurs, the reason is checked and found, and after the alarm is eliminated, the operation of the step 3 is repeated.

Description

Special system instrument value monitoring and adjusting method Technical Field The invention belongs to the technical field of instrument monitoring, and particularly relates to a special system instrument value monitoring and adjusting method. Background The current special system monitors fluid changes mainly through pressure gauges and light impurity meters. There are currently mainly two ways to observe the system control parameters. Firstly, manually recording parameters, secondly, externally adding a pilot control system, and sending an alarm signal when the control pressure exceeds a set value of +/-30 Pa. The first type of manual monitoring cannot respond to system parameter changes in real time, and the second type of manual monitoring requires additional display equipment and a switch. The light impurity instrument mainly monitors through a bridge circuit in a measuring mode, materials can be continuously accumulated on the bridge circuit along with the passing of measuring time, so that the value of the light impurity instrument drifts, particularly, a special equipment group at a product end is provided, the light impurity instrument is in linear slow rising, because the value of the light impurity instrument and a system have interlocking reaction, when the value exceeds an operation limit value, the system can actively perform interlocking protection, and therefore, when the value of the light impurity instrument exceeds 6.0mA, a process staff needs to adjust the value of the light impurity instrument by adjusting the sliding variable resistor on a data acquisition board of the light impurity instrument on site. Disclosure of Invention The technical problems to be solved by the invention are to provide a method for monitoring and adjusting the numerical value of a special system instrument, to send out an early warning signal to ensure the stable operation of the system by monitoring the numerical value change trend of the instrument, and to provide a method for remotely controlling and zeroing a light impurity meter to reduce the on-site adjustment frequency of process personnel. The invention adopts the technical scheme that: A method for monitoring and adjusting the numerical value of a special system instrument comprises the following steps of 1, collecting signals of a pressure gauge and a light impurity monitoring instrument, 2, transmitting the signals collected in the step 1 to an operation station, 3, transmitting the signals obtained in the step 2 to a DCS through conversion processing, and 4, adding a trend alarming function to the data of the step 3. The signals include voltage signals and current signals. In the step 3, aiming at the pressure gauge in the step 1, the collected voltage signals are linearly converted into pressure data through the pressure measuring range and the corresponding pressure measuring range. In the step 3, aiming at the light impurity monitoring instrument in the step 1, the collected signals are converted into a group of data, the data are real data, and a group of data are added for display on the basis. In the step 3, the added set of data is zeroable data. In the step 3, the two paths of signals are respectively set as a display value I, a true value T, an alarm value B and an interlocking value L on the DCS, the fluctuation of the display value I and the true value T is delta I2= (L-4) mA, and when the true value T is smaller than (19-delta I2) mA, the normal operation is realized. The maximum output value is 20mA, and the redundancy amount of 1mA is reserved. The real value T is larger than 6.00mA, the (19-delta I2) mA is smaller than the real value T without on-site zeroing, manual program assignment is carried out, remote control zeroing is carried out when the display value I is slowly increased to 6.0mA according to a rule, an alarm signal is sent when the display value I is quickly increased to be larger than or equal to the alarm value B, and interlocking occurs when the display value I is quickly increased to be larger than or equal to the interlock value L. In the step 4, for the pressure gauge with the set value, the acquisition time Δt, the real-time value P1 and the upper limit Δp of the fluctuation of the pressure value are set, if the absolute value |p-p1| > Δp of the difference between the set value P and the real-time value P1, a trend alarm signal is sent to remind that abnormality occurs, abnormal fluctuation occurs, the reason is checked and found, and after the alarm is eliminated, the step 1 is repeated. In the step 4, for the light impurity meter without the set value, the collection time Deltat=t2-t 1 is set, the current value fluctuation upper limit DeltaI is set, the real-time value I1 collected at the time of t1 and the real-time value I2 collected at the time of t2 are set, if the DeltaI is I1-I2, a trend alarm signal is sent out to remind that abnormality occurs, abnormal fluctuation occurs, the reason is checked and foun