A special system instrument value monitoring and adjusting method

Abstract

The present application belongs to the technical field of instrument monitoring, and particularly relates to a special system instrument value monitoring and adjusting method. The present application comprises the following steps: step 1, collecting signals of 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. The present application can ensure stable operation of the system by monitoring the value change trend of the instrument and sending a pre-warning signal, and provides a remote zero adjusting method for the light impurity gauge, thereby reducing the frequency of on-site adjustment by process personnel.

Description

Technical Field

[0001] This invention belongs to the field of instrument monitoring technology, and specifically relates to a method for monitoring and adjusting instrument values ​​in a dedicated system. Background Technology

[0002] Currently, dedicated systems monitor fluid changes primarily through pressure gauges and light impurity meters. There are two main methods for observing system control parameters: one is manual recording of parameters; the other is adding an external pre-control system that issues an alarm signal when the control pressure exceeds the set value ±30Pa. The first method, manual monitoring, cannot reflect real-time changes in system parameters, while the second requires external display equipment and a switch.

[0003] Because light impurity meters primarily monitor through a bridge circuit, material accumulates on the bridge circuit over time, causing the meter readings to drift. This is especially noticeable in dedicated equipment units at the product end, where the light impurity readings show a linear, slow increase. Since the light impurity meter readings are interlocked with the system, the system will automatically activate interlock protection when the reading exceeds the operating limit. Therefore, whenever the light impurity meter reading exceeds 6.0mA, process personnel need to go to the site to adjust the sliding resistance on the light impurity meter's data acquisition board to correct the reading. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a method for monitoring and adjusting instrument values ​​in a dedicated system, which issues early warning signals by monitoring the trend of changes in instrument values ​​to ensure stable system operation; and to provide a method for remote zeroing of a light impurity meter, reducing the frequency of on-site adjustments by process personnel.

[0005] The technical solution adopted in this invention is as follows:

[0006] A method for monitoring and adjusting instrument values ​​in a dedicated system includes the following steps: Step 1, acquiring signals from pressure gauges and light impurity monitoring instruments; Step 2, transmitting the signals acquired in Step 1 to the operator station; Step 3, transmitting the signals obtained in Step 2 to the DCS after conversion processing; Step 4, adding a trend alarm function to the data from Step 3.

[0007] The signals include voltage signals and current signals.

[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, the signal collected by the light impurity monitoring instrument in step 1 is converted into a set of data, which is real data. An additional set of data is then added for display.

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

[0011] In step 3, the two signals are set on the DCS as display value I, actual value T, alarm value B, and interlock value L, respectively. The maximum fluctuation of display value I and actual value T is ΔI2 = (L-4) mA. When the actual value T is less than (19-ΔI2) mA, it works normally.

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

[0013] If the actual value T is greater than 6.00mA and less than (19-△I2)mA, no on-site zeroing is required. The value is assigned manually by the program. When the displayed value I slowly increases to 6.0mA according to a certain pattern, remote control zeroing is performed. When the displayed value I increases rapidly to a value greater than or equal to the alarm value B, an alarm signal is issued. When I increases rapidly to a value greater than or equal to the interlock value L, the interlock occurs.

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

[0015] In step 4, for light impurity instruments without a set value, the sampling time Δt = t2 - t1 is set, the upper limit of current value fluctuation ΔI is set, and the real-time value I1 collected at time t1 and the real-time value I2 collected at time t2 are compared. If |I1 - I2| > ΔI, a trend alarm signal is issued to remind that an abnormality has occurred. If abnormal fluctuation occurs, check and find the cause; after clearing the alarm, repeat the work of step 3.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] (1) The present invention provides a special system instrument value monitoring and adjustment method, which can solve the problem that if the existing system instrument values ​​change and are not detected in time, the values ​​may continue to change until they reach the alarm value and an alarm signal is issued before the changes are detected. This method can detect instruments with changing values ​​in time and improve system operating efficiency.

[0018] (2) The present invention provides a special system instrument numerical monitoring and adjustment method, which can effectively monitor the changes of all system parameters, respond in a timely manner when the parameters change in a short period of time, improve system operating efficiency, and reduce the frequency of process personnel to adjust on-site. Attached Figure Description

[0019] Figure 1 A flowchart of a dedicated system instrument numerical monitoring and adjustment method provided by the present invention;

[0020] Figure 2 Flowchart for pressure trend alarm;

[0021] Figure 3 Flowchart for light impurity trend alarm. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] like Figure 1 As shown, the present invention provides a method for monitoring and adjusting the numerical values ​​of instruments in a dedicated system, comprising the following steps:

[0026] Step 1: Collect signals from the pressure gauge and the light impurity monitoring instrument, including voltage and current signals;

[0027] Step 2: Transmit the signal collected in Step 1 to the operator station;

[0028] Step 3: Transmit the signal obtained in Step 2 to the DCS after 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 the real data. On this basis, an additional set of data is added for display. This additional set of data is adjustable zero data. The two signals are set on the DCS as the display value I and the real value T, respectively.

[0031] Step 3.3: Set the display value I, the actual value T, the alarm value B, and the interlock value L. Since the maximum output value is 20mA, a 1mA redundancy is reserved. The maximum fluctuation between the display value and the actual value is ΔI2 = (L-4)mA. Therefore, the actual value is less than (19-ΔI2)mA and can work normally.

[0032] If the actual value is greater than 6.00mA and less than (19-ΔI²)mA, no on-site zeroing is required. It can be manually programmed; when the displayed value slowly increases to 6.0mA according to a set pattern, remote zeroing is performed. An alarm signal is issued when the displayed value I rapidly increases to a value greater than or equal to the alarm value B; and an interlock is triggered when I rapidly increases to a value greater than or equal to the interlock value L.

[0033] Step 4: Add a trend alarm function to the data from Step 3;

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

[0035] Set the data acquisition time Δt, the real-time value P1, and the upper limit of pressure fluctuation ΔP. If the absolute value of the difference between the set value P and the real-time value P1, |P-P1|, is greater than ΔP, a trend alarm signal is issued to alert that an abnormality has occurred. If abnormal fluctuation occurs, check and find the cause. After clearing the alarm, repeat step 1.

[0036] 4.2 For instruments with light impurities that do not have a set value, such as Figure 3 As shown:

[0037] Set the acquisition time Δt = t2 - t1, set the upper limit of current value fluctuation ΔI, the real-time value I1 acquired at time t1 and the real-time value I2 acquired at time t2, if |I1 - I2| > ΔI, then issue a trend alarm signal to remind that an abnormality has occurred. If abnormal fluctuation occurs, check and find the cause; after clearing the alarm, repeat step 3.

[0038] To address the need for real-time monitoring of operational control parameters, this invention proposes a dedicated system instrument value change early warning method and a remote zeroing method for the light impurity meter. The value early warning system 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 indicator light changes from green to red until the deviation between the measured value and the control value is less than ΔP, returning to green. The light impurity meter reading, due to its inherent slow rise caused by fluid disturbances, does not have a set value. Therefore, the real-time value is compared with the change over time Δt. If the change exceeds ΔI, a trend alarm signal is issued. Figure 2 In this case, Δt = t2 - t1.

[0039] To address the need for real-time monitoring of operational control parameters, this invention proposes a remote zeroing method for light impurity meters. Since existing light impurity meters display output values ​​within the range of 4-20mA, and alarm and interlock values ​​differ significantly from their maximum values, to reduce the number of on-site zeroing adjustments, an additional data channel for the light impurity monitor's reading is added to the existing operator station. The DCS displays two values: one is the light impurity monitor's own value, which releases the interlock; the other is a remotely adjustable value that establishes the interlock.

[0040] It will be apparent to those skilled in the art that the present 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 its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for monitoring and adjusting system instrument values, characterized in that, The process includes the following steps: Step 1, acquiring signals from pressure gauges and light impurity monitoring instruments; Step 2, transmitting the signals acquired in Step 1 to the operator station; Step 3, transmitting the signals obtained in Step 2 to the DCS after conversion processing; Step 4, adding trend alarm function to the data from Step 3. In step 3, the signal collected by the light impurity monitoring instrument in step 1 is converted into a set of data, which is real data. A set of data is then added on top of this data for display. In step 3, the two signals are set on the DCS as display value I, real value T, alarm value B, and interlock value L, respectively. The maximum fluctuation of display value I and real value T is ΔI2 = (L-4) mA. When the real value T is less than (19-ΔI2) mA, it works normally. If the actual value T is greater than 6.00mA and less than (19-△I2)mA, no on-site zeroing is required. The value is assigned manually by the program. When the displayed value I slowly increases to 6.0mA according to a certain pattern, remote control zeroing is performed. When the displayed value I increases rapidly to a value greater than or equal to the alarm value B, an alarm signal is issued. When I increases rapidly to a value greater than or equal to the interlock value L, the interlock occurs.

2. The system instrument value monitoring and adjustment method according to claim 1, characterized in that, The signals include voltage signals and current signals.

3. The system instrument value monitoring and adjustment method according to claim 1, 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 system instrument value monitoring and adjustment method according to claim 3, characterized in that, In step 3, the added data is adjustable zero data.

5. The system instrument value monitoring and adjustment method according to claim 4, characterized in that, The maximum output value is 20mA, with a 1mA redundancy.

6. The system instrument numerical monitoring and adjustment method according to claim 5, characterized in that, In step 4, for a pressure gauge with a set value, the collection time Δt is set, the real-time value P1 is set, and the upper limit of pressure value fluctuation ΔP is set. If the absolute value of the difference between the set value P and the real-time value P1, |P-P1|>ΔP, a trend alarm signal is issued to remind that an abnormality has occurred. If abnormal fluctuation occurs, check and find the cause. After clearing the alarm, repeat step 1.

7. The system instrument numerical monitoring and adjustment method according to claim 6, characterized in that, In step 4, for light impurity instruments without a set value, the sampling time Δt = t2 - t1 is set, the upper limit of current value fluctuation ΔI is set, and the real-time value I1 collected at time t1 and the real-time value I2 collected at time t2 are compared. If |I1 - I2| > ΔI, a trend alarm signal is issued to remind that an abnormality has occurred. If abnormal fluctuation occurs, check and find the cause; after clearing the alarm, repeat the work of step 3.

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