Special system instrument numerical value monitoring and adjusting method

Abstract

The invention belongs to the technical field of instrument monitoring, and particularly relates to a special system instrument numerical value monitoring and adjusting method. The method comprises the following steps: step 1, collecting signals of a pressure gauge and a light impurity monitoring instrument; 2, transmitting the signal acquired in the step 1 to an operation station; 3, the signals obtained in the step 2 are transmitted to a DCS through conversion processing; and 4, adding a trend alarm function to the data in the step 3. According to the invention, by monitoring the instrument value change trend, an early warning signal is sent to ensure stable operation of the system; the invention provides a remote control zero setting method for a light impurity meter, and the on-site adjustment frequency of technicians is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of instrument monitoring, and in particular relates to a method for monitoring and adjusting numerical values ​​of a special system instrument. Background Art

[0002] At present, the dedicated system mainly monitors fluid changes through pressure gauges and light impurity instruments. There are currently two main ways to observe system control parameters. One is to record parameters manually; the other is to add an external pre-control system, which will issue an alarm signal when the control pressure exceeds the set value ±30Pa. The first manual monitoring cannot reflect system parameter changes in real time, and the second requires external display equipment and switches.

[0003] The light impurity instrument mainly measures through a bridge circuit. As the measurement time goes by, materials will continue to accumulate on the bridge circuit, causing the light impurity monitoring instrument value to drift. Especially for the product-side dedicated equipment group, the light impurity monitoring instrument rises slowly and linearly. Since the light impurity monitoring instrument value is interlocked with the system, when the value exceeds the operating limit, the system will actively perform interlock protection. Therefore, whenever the light impurity monitoring instrument value exceeds 6.0mA, the process personnel need to go to the site to adjust the sliding resistance on the light impurity table data acquisition board to adjust the light impurity monitoring instrument value. Summary of the invention

[0004] The technical problems solved by the present invention are as follows: providing a method for monitoring and adjusting the numerical values ​​of a special system instrument, by monitoring the changing trend of the instrument numerical values, issuing an early warning signal, and ensuring the stable operation of the system; providing a method for remotely controlling zeroing of a light impurity meter, reducing the frequency of on-site adjustments by process personnel.

[0005] The technical solution adopted by the present invention is:

[0006] A method for monitoring and adjusting the numerical values ​​of instruments in a special system comprises the following steps: step 1, collecting signals from a pressure gauge and a light impurity monitoring instrument; step 2, transmitting the signals collected in step 1 to an operation station; step 3, transmitting the signals obtained in step 2 to a DCS through conversion processing; and step 4, adding a trend alarm function to the data in step 3.

[0007] The signal includes a voltage signal and a current signal.

[0008] In step 3, for the pressure gauge in step 1, the collected voltage signal is linearly converted into pressure data through the pressure range and the corresponding pressure range.

[0009] In step 3, for the light impurity monitoring instrument in step 1, the collected signal is converted into a set of data, which is real data, and on this basis, an additional set of data is added for display.

[0010] In step 3, the added set of data is zero-adjustable data.

[0011] In step 3, the two signals are respectively set as display value I and real value T on DCS, and alarm value B and interlock value L are set. The maximum fluctuation of display value I and real value T is △I2=(L-4)mA. When the real value T is less than (19-△I2)mA, the system works normally.

[0012] The maximum output value is 20mA, with 1mA redundancy reserved.

[0013] When the real value T is greater than 6.00mA and less than (19-△I2)mA, no on-site zero adjustment is required and the value can be assigned manually. When the displayed value I increases slowly to 6.0mA according to the rules, remote control zero adjustment is performed. When the displayed value I increases rapidly to be greater than or equal to the alarm value B, an alarm signal is issued. When I increases rapidly to be greater than or equal to the interlock value L, interlock occurs.

[0014] In step 4, for the pressure gauge with set values, set the collection time △t, the real-time value P1, and the pressure value fluctuation upper limit △P. If the absolute value of the difference between the set value P and the real-time value P1 |P-P1|>△P, a trend alarm signal is issued to remind that an abnormality has occurred. If an abnormal fluctuation occurs, check and find the cause; after eliminating the alarm, repeat step 1.

[0015] In step 4, for the light impurity instrument without set value, set the collection time △t=t2-t1, set the current value fluctuation upper limit △I, the real-time value I1 collected at time t1 and the real-time value I2 collected at time t2. If |I1-I2|>△I, a trend alarm signal is issued to remind that an abnormality has occurred. If an abnormal fluctuation occurs, check and find the cause; after eliminating the alarm, repeat the work in step 3.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The method for monitoring and adjusting the numerical value of a dedicated system instrument provided by the present invention can solve the problem that if the numerical value of an existing system instrument is not promptly inspected and discovered, the numerical value may continue to change until it reaches the alarm value and an alarm signal is issued, thereby promptly discovering the instrument whose numerical value has changed and improving the system operation efficiency;

[0018] (2) The present invention provides a method for monitoring and adjusting the numerical values ​​of a dedicated system instrument, which can effectively monitor the changes in all system parameters and respond promptly when the parameters change in a short period of time, thereby improving the system operation efficiency and reducing the frequency of on-site adjustments by process personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A flow chart of a method for monitoring and adjusting the numerical value of a dedicated system instrument provided by the present invention;

[0020] Figure 2 This is the pressure trend alarm flow chart;

[0021] Figure 3 This is the light impurity trend alarm flow chart. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figure 1 As shown, a dedicated system instrument numerical value monitoring and adjustment method provided by the present invention comprises the following steps:

[0026] Step 1, collecting signals from a pressure gauge and a light impurity monitoring instrument, wherein the signals include a voltage signal and a current signal;

[0027] Step 2, transmitting the signal collected in step 1 to the operation station;

[0028] Step 3: The signal obtained in step 2 is transmitted to the DCS through conversion processing;

[0029] Step 3.1: For the pressure gauge in step 1, the collected voltage signal is linearly converted into pressure data through the pressure range and the corresponding pressure range.

[0030] Step 3.2: for the light impurity monitoring instrument in step 1, the collected signal is converted into a set of data, which is real data, and on this basis, a set of data is added for display, and the added set of data is adjustable zero data; the two signals are set as display value I and real value T respectively on DCS;

[0031] Step 3.3, set the display value I, the real value T, the alarm value B, and the interlock value L. Because the maximum output value is 20mA, a 1mA redundancy is reserved, and the maximum fluctuation from the display to the real value is △I2=(L-4)mA, so the real value is less than (19-△I2)mA and it can work normally.

[0032] If the actual value is greater than 6.00mA and less than (19-△I2)mA, there is no need to adjust zero on site. You can assign values ​​manually. When the displayed value increases slowly to 6.0mA according to the rules, remote control adjustment is performed. When the displayed value I increases rapidly to be greater than or equal to the alarm value B, an alarm signal is issued. When I increases rapidly to be greater than or equal to the interlock value L, interlock occurs.

[0033] Step 4: Add trend alarm function to the data in step 3;

[0034] 4.1 For pressure gauges with set values, such as Figure 2 As shown:

[0035] Set the acquisition time △t, the real-time value P1, and the pressure value fluctuation upper limit △P. If the absolute value of the difference between the set value P and the real-time value P1 |P-P1|>△P, a trend alarm signal is issued to remind you of abnormalities. If abnormal fluctuations occur, check and find the cause; after eliminating the alarm, repeat step 1.

[0036] 4.2 For light impurity instruments without set values, such as Figure 3 As shown:

[0037] Set the collection time △t=t2-t1, set the current value fluctuation upper limit △I, the real-time value I1 collected at time t1 and the real-time value I2 collected at time t2. If |I1-I2|>△I, a trend alarm signal is issued to remind you of abnormalities. If abnormal fluctuations occur, check and find the causes. After eliminating the alarm, repeat step 3.

[0038] In order to grasp the operation control parameters in real time, the present invention proposes a special system instrument value change warning method and a light impurity meter remote control zeroing method. The numerical warning adds a trend alarm to the existing DCS system. When the deviation between the measured pressure parameter and the set parameter exceeds ΔP, a trend alarm signal is issued, and the corresponding unit signal light changes from green to red until the deviation between the measured value and the control value is less than ΔP and returns to green. The light impurity meter indicates a value. Since the meter itself will rise slowly due to fluid interference, there is no set value. Therefore, the real-time value is collected and compared with the Δt time change value. If the change value exceeds ΔI, a trend alarm signal is issued. Figure 2 Δt=t2-t1.

[0039] In order to grasp the operation control parameters in real time, the present invention proposes a remote control zeroing method for a light impurity meter. Since the output value display range of the existing light impurity meter is 4-20mA, and the alarm value and interlock value are far from the maximum value, in order to reduce the number of on-site zeroing, a light impurity monitor value data channel is added to the existing operation station, and two values ​​are displayed on the DCS, one is the value of the light impurity monitoring instrument itself to release the interlock, and the other is the remote control adjustable value to establish the interlock.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and range of equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for monitoring and adjusting the numerical value of a dedicated system instrument, characterized in that: The method comprises the following steps: step 1, collecting signals from a pressure gauge and a light impurity monitoring instrument; step 2, transmitting the signals collected in step 1 to an operation station; step 3, transmitting the signals obtained in step 2 to a DCS through conversion processing; and step 4, adding a trend alarm function to the data in step 3.

2. The dedicated system instrument numerical value monitoring and adjustment method according to claim 1 is characterized in that: The signal includes a voltage signal and a current signal.

3. The dedicated system instrument numerical value monitoring and adjustment method according to claim 1 is characterized in that: In step 3, for the pressure gauge in step 1, the collected voltage signal is linearly converted into pressure data through the pressure range and the corresponding pressure range.

4. The dedicated system instrument numerical value monitoring and adjustment method according to claim 3 is characterized in that: In step 3, for the light impurity monitoring instrument in step 1, the collected signal is converted into a set of data, which is real data, and on this basis, an additional set of data is added for display.

5. The method for monitoring and adjusting the numerical value of a dedicated system instrument according to claim 4 is characterized in that: In step 3, the added set of data is zero-adjustable data.

6. The method for monitoring and adjusting the numerical value of a dedicated system instrument according to claim 5 is characterized in that: In step 3, the two signals are respectively set as display value I and real value T on DCS, and alarm value B and interlock value L are set. The maximum fluctuation of display value I and real value T is △I2=(L-4)mA. When the real value T is less than (19-△I2)mA, the system works normally.

7. The method for monitoring and adjusting the numerical value of a dedicated system instrument according to claim 6 is characterized in that: The maximum output value is 20mA, with 1mA redundancy reserved.

8. The method for monitoring and adjusting the numerical value of a dedicated system instrument according to claim 7 is characterized in that: When the real value T is greater than 6.00mA and less than (19-△I2)mA, no on-site zero adjustment is required and the value can be assigned manually. When the displayed value I increases slowly to 6.0mA according to the rules, remote control zero adjustment is performed. When the displayed value I increases rapidly to be greater than or equal to the alarm value B, an alarm signal is issued. When I increases rapidly to be greater than or equal to the interlock value L, interlock occurs.

9. The method for monitoring and adjusting the numerical value of a dedicated system instrument according to claim 8, characterized in that: In step 4, for the pressure gauge with set values, set the collection time △t, the real-time value P1, and the pressure value fluctuation upper limit △P. If the absolute value of the difference between the set value P and the real-time value P1 |P-P1|>△P, a trend alarm signal is issued to remind that an abnormality has occurred. If an abnormal fluctuation occurs, check and find the cause; after eliminating the alarm, repeat step 1.

10. The dedicated system instrument numerical value monitoring and adjustment method according to claim 9 is characterized in that: In step 4, for the light impurity instrument without set value, set the collection time △t=t2-t1, set the current value fluctuation upper limit △I, the real-time value I1 collected at time t1 and the real-time value I2 collected at time t2. If |I1-I2|>△I, a trend alarm signal is issued to remind that an abnormality has occurred. If an abnormal fluctuation occurs, check and find the cause; after eliminating the alarm, repeat the work in step 3.

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