Parameter Setting Method of Signal Shaping Unit of Bridge Inclinometer

Abstract

The present disclosure belongs to the field of nuclear power technology, and specifically relates to a method for setting parameters of a bridge inclinometer signal shaping unit. During the shutdown and overhaul period of the power plant, the present disclosure pre-sets the parameters of the signal shaping unit according to the physical characteristics of the accelerometer equipment. The parameters of the independently designed signal shaping unit are set through four parts: initial condition setting, parameter pre-setting, bridge no-load and load testing, and final parameter adjustment and setting. The setting method comprehensively considers many factors such as the signal shaping unit, the physical characteristics of the accelerometer equipment, and the actual operating conditions of the bridge. The implementation method is efficient and reliable. After the bridge no-load and load tests, the parameters are finally modified and set according to the signal fluctuation situation. The parameter setting method described in the present disclosure is highly reliable and highly operable. During the operation of the unit, the signal shaping unit is stable and reliable, and the frequent alarms are greatly reduced.

Description

Technical Field

[0001] The present disclosure belongs to the field of nuclear power technology, and particularly relates to a method for setting parameters of a bridge inclinometer signal shaping unit. Background Art

[0002] The bridge system is located at the end of the reactor. Its primary function is to carry the loader and unloader in vertical motion across the reactor end. An accelerometer is mounted on the bridge, and its output voltage signal is used to detect whether the bridge is tilting during operation. A signal shaping unit is connected to the upper end of the accelerometer to power the accelerometer, collect signals, and generate alarms. Once the voltage signal collected by the signal shaping unit exceeds the alarm setpoint, indicating that the bridge is tilted, the bridge drive logic circuit is immediately disconnected, shutting down the bridge. Because heavy water reactor nuclear power plants require continuous refueling, 15 channels must be refueled weekly. The bridge, carrying the loader and unloader, frequently operates across the reactor end, placing it in an inaccessible area during unit operation. Any bridge failure requires the unit to be shut down for maintenance. Summary of the Invention

[0003] In order to overcome the problems existing in the related art, a method for setting parameters of a bridge inclinometer signal shaping unit is provided.

[0004] According to one aspect of an embodiment of the present disclosure, a method for setting parameters of a bridge inclinometer signal shaping unit is provided, the method comprising the following steps:

[0005] Step A: Configure initial conditions. Measure and adjust the bridge track level and the height difference between the bridge and the maintenance area track. Set the readings of the two axis encoders on the long and short column sides of the bridge to the reference values. Use the three-point method to adjust the bridge inclinometer probe bracket so that the inclinometer probe output voltage reaches the preset value. Connect the host computer to the signal shaping unit. Find the shaping unit device in the host computer system menu and click it to enter the programming interface.

[0006] Step B, configuring the alarm unit, includes:

[0007] Step 21: In the input module of the host computer, select the measurement type as mV, the signal range as -1000mV to 1000mV, and configure single input channel 1. In the connection module of the host computer, adjust the gain of input channel 1 and set the gain to zero. Then, associate the gained signal with output channel 1. In output channel 1, set the compensation value to 0 and the gain multiplier to 1.

[0008] Step 22: In the meter module of the host computer, select the linear signal for the signal shaping unit; in the analog output module, set the output type of output channel 1 to the current output range of 4.00 to 20.00 mA and the output limit to 3.80 to 20.50 mA;

[0009] Step 23: In the alarm limit module of the host computer, set the alarm delay time to 2 seconds, the trigger alarm value to ±160mV, and the clear alarm value to ±159mV. In the alarm module, configure 4 relays and check the logic flip and alarm indicator light.

[0010] Step 24: After all parameters are configured, the configured parameter data is downloaded to the alarm unit;

[0011] Step C, signal display storage unit parameter configuration, including:

[0012] Step 31: Enter the password on the display panel to enter the configuration settings;

[0013] Step 32: In the input module, open input channel 1, select the channel type as current, the signal type as 4 to 20mA, the unit as mV, the decimal point as 0, the lower limit of the range as -1000, the upper limit of the range as 1000, the multiplier adjustment parameter as 1, the addition and subtraction adjustment parameter as 0, the filtering and cutoff as 0, and close other unused input channels; in the alarm module, set channel 1 to the open state, the relay delay to 2 seconds, the alarm return difference to 0, the preset probe alarm to ±160mV, and the upper and lower alarm limits to the maximum positive and negative values;

[0014] Step 33: In the communication module, set the address to 001, the baud rate to 9600, and the byte swap value to 2143; in the transmitter module, set the transmitter channel to 01 and the source channel to 01;

[0015] Step 34: After all parameters are set, save and exit the configuration interface to complete the setting of the signal display storage unit.

[0016] In a possible implementation, the method further includes step D, final parameter adjustment, and step D includes steps 41 to 44;

[0017] Step 41: Use a DC voltage source as a signal source and connect it to the signal input terminal of the bridge tilt signal shaping unit; adjust the voltage source to output a high voltage alarm setting value +0.001V, confirm that the high voltage alarm light on the signal shaping unit is on, and the high alarm signal of the signal display storage unit is triggered; adjust the voltage source to output a high voltage alarm setting value -0.001V, confirm that the high voltage alarm light on the signal shaping unit is off, and the high alarm signal of the signal display storage unit is eliminated;

[0018] Step 42: Adjust the voltage source to output a low voltage alarm setting value of -0.001V, confirm that the low voltage alarm light on the signal shaping unit is on, and the low alarm signal of the signal display storage unit is triggered; adjust the voltage source to output a low voltage alarm setting value of +0.001V, confirm that the low voltage alarm light on the signal shaping unit is off, and the low alarm signal of the signal display storage unit is eliminated;

[0019] Step 43: Drive the bridge function test. When the bridge is loaded with a loader and the loader is on bridge track XM11, it is driven by motors 1 and 2 respectively, and moves vertically from position YM3 to position YM5 twice. During the movement, the signal fluctuation of the display panel in front of the signal shaping unit is recorded. When the rear bridge is unloaded, it is driven by motors 1 and 2 respectively, and moves vertically from position YM3 to position YM5 twice. Each fluctuation value should not be greater than 20mV. If it exceeds 20mV, the alarm limit is increased by 50mV based on the fluctuation value.

[0020] In step 44, based on the actual alarm range calculated in step 43, the plus or minus adjustment parameter, i.e., the expansion value of the alarm range, is set in the signal display storage unit; the compensation value in the alarm unit connection module is modified using programming software on the computer; the compensation value is the same as the expansion value of the alarm range; after saving and exiting, the final setting of the signal shaping unit parameters is completed.

[0021] In one possible implementation, in step 11, the bridge rail is horizontally measured and adjusted so that the height difference of the bridge rail in the long axis direction is less than 3 mm, and the height difference in the short axis direction is less than 0.2 mm; the height difference between the rails on the bridge and the maintenance area rails is measured and adjusted so that the bridge rail is 0.75 mm to 1.00 mm higher than the maintenance area rails.

[0022] In a possible implementation, in step 12, the readings of the two shaft encoders on the long column side and the short column side of the bridge are both set to 100, and the state where the readings of the two shaft encoders are both 100 is determined as the reference value of the bridge shaft encoder.

[0023] In a possible implementation, in step 13, the three-point method is used to adjust the bridge inclinometer probe bracket so that the inclinometer probe output voltage is 0V, and the state where the inclinometer probe output voltage is 0V is used as the reference point of the bridge inclinometer probe.

[0024] In one possible implementation, in step 14, use a host computer to connect to the signal shaping unit via a communication cable (communication interface RS-485), open the communication management software, and configure the interface protocol to RS232 / RS485; the communication interface baud rate is 19200, the stop bit is 2, and the parity check is none; find the shaping unit device in the host computer system menu and click to enter the programming interface.

[0025] The beneficial effects of the present disclosure are as follows: during the shutdown and overhaul of a power plant, the present disclosure pre-sets the parameters of the signal shaping unit according to the physical characteristics of the accelerometer equipment, and completes the setting of the parameters of the independently designed signal shaping unit through four parts: initial condition setting, parameter pre-setting, bridge no-load and load testing, and parameter final adjustment and setting. The setting method comprehensively considers many factors such as the signal shaping unit, the physical characteristics of the accelerometer equipment, and the actual operating conditions of the bridge. The implementation method is efficient and reliable. After the bridge no-load and load tests, the parameters are finally modified and set according to the signal fluctuation. The parameter setting method described in the present disclosure is highly reliable and highly operational. During the operation of the unit, the signal shaping unit is stable and reliable, and the frequent alarms are greatly reduced. After summarizing the maintenance experience of several cycles, the maintenance and setting method steps are optimized and solidified, and the efficiency of the maintenance personnel and the maintenance quality are greatly improved, meeting the management requirements of the power station, and can provide a signal shaping unit parameter setting method and technical support for power plants with the same type of bridges. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a flow chart of a method for setting parameters of a bridge inclinometer signal shaping unit shown in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] The present disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Unless otherwise defined, the technical and scientific terms used in this disclosure have the same meanings as those generally understood by those skilled in the art to which this disclosure belongs; the terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit this disclosure; the terms in this disclosure include and any variations thereof, and are intended to cover non-exclusive inclusions. Obviously, the embodiments described in this disclosure are only some of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of this disclosure.

[0029] References to embodiments in this disclosure mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of such phrases in various places in the specification does not necessarily refer to the same embodiment, nor do they constitute independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] Figure 1 This is a flow chart of a method for setting parameters of a bridge inclinometer signal shaping unit according to an embodiment of the present disclosure. Figure 1 As shown, the method includes the following steps.

[0031] Step A, initial condition configuration, includes steps 11 to 14.

[0032] Step 11: Measure and adjust the bridge track horizontally so that the height difference of the bridge track in the long axis direction is less than 3mm, and the height difference in the short axis direction is less than 0.2mm; measure and adjust the height difference between the bridge and the maintenance area track so that the bridge track is 0.75mm to 1.00mm higher than the maintenance area track.

[0033] Step 12: Set the readings of both shaft encoders on the long and short columns of the bridge to 100. This setting is used as the baseline value for the bridge shaft encoders. For example, the shaft encoder readings can be adjusted to a value greater than 100 and then reduced to 100.

[0034] Step 13: Use the three-point method to adjust the bridge inclinometer probe bracket so that the inclinometer probe output voltage is 0V, and use the state where the inclinometer probe output voltage is 0V as the reference point of the bridge inclinometer probe.

[0035] Step 14: Connect the host computer to the signal shaping unit via a communication cable (RS-485 communication interface). Open the communication management software and configure the interface protocol to RS232 / RS485. Set the communication interface baud rate to 19200, stop bits to 2, and parity to none. Find the shaping unit device in the host computer system menu and click it to enter the programming interface.

[0036] Step B, configuring the alarm unit, including steps 21 to 24;

[0037] Step 21: In the host computer's input module, select the measurement type as mV, the signal range as -1000mV to 1000mV, and configure single input channel 1. In the host computer's connection module, adjust the gain of input channel 1 within its range, typically setting the gain to zero. Then, associate the gained signal with output channel 1. In output channel 1, set the compensation value to 0 and the gain multiplier to 1.

[0038] Step 22: In the meter module of the host computer, select the linear signal for the signal shaping unit. In the analog output module, set the output type of output channel 1 to the current output range of 4.00 to 20.00 mA and the output limit of 3.80 to 20.50 mA.

[0039] In step 23, in the alarm limit module on the host computer, set the alarm delay to 2 seconds, the trigger alarm threshold to ±160mV, and the clear alarm threshold to ±159mV. During unit operation, both the alarm delay and trigger alarm threshold can be fine-tuned based on the actual fluctuations of the inclinometer probe. In the alarm module, configure four relays and enable the logic flip and alarm indicator.

[0040] Step 24: After all parameters are configured, the configured parameter data is downloaded to the alarm unit.

[0041] Step C, signal display storage unit parameter configuration, includes steps 31 to 34.

[0042] Step 31: Enter the password on the display panel to enter the configuration settings.

[0043] Step 32. In the input module, turn on input channel 1, select the channel type as current, the signal type as 4 to 20mA, the unit as mV, the decimal point as 0, the lower limit of the range as -1000, the upper limit of the range as 1000, the multiplier adjustment parameter as 1, the addition and subtraction adjustment parameter as 0, the filtering and cutting off as 0, and turn off other unused input channels; in the alarm module, set channel 1 to the open state, the relay delay to 2 seconds, the alarm return difference to 0, the preset probe alarm to ±160mV, and the upper and lower limit values ​​of the alarm to the maximum positive and negative values.

[0044] Step 33: In the communication module, set the address to 001, the baud rate to 9600, and the byte swap value to 2143. In the transmitter module, set the transmitter channel to 01 and the source channel to 01.

[0045] Step 34: After all parameters are set, save and exit the configuration interface to complete the setting of the signal display storage unit.

[0046] Step D, final parameter adjustment, includes steps 41 to 44 .

[0047] Step 41: Use a DC voltage source as the signal source and connect it to the signal input terminal of the bridge tilt signal shaping unit. Adjust the voltage source to output a voltage value equal to the high voltage alarm setting value +0.001V. Verify that the high voltage alarm light on the signal shaping unit illuminates, indicating that the high alarm signal of the signal display storage unit has been triggered. Adjust the voltage source to output a voltage value equal to -0.001V, indicating that the high voltage alarm light on the signal shaping unit turns off, indicating that the high alarm signal of the signal display storage unit has been eliminated.

[0048] Step 42: Adjust the voltage source output to a low voltage alarm setting value of -0.001V. Verify that the low voltage alarm light on the signal shaping unit illuminates and the low alarm signal in the signal display storage unit is triggered. Adjust the voltage source output to a low voltage alarm setting value of +0.001V. Verify that the low voltage alarm light on the signal shaping unit turns off and the low alarm signal in the signal display storage unit is cleared.

[0049] Step 43: Test the drive bridge function. With the loader loaded and the loader on bridge track XM11, the bridge is driven by motors 1 and 2, respectively, in two vertical movements from positions YM3 to YM5. During these movements, record the signal fluctuations on the front display panel of the signal shaping unit. With the rear bridge unloaded, the bridge is driven by motors 1 and 2, respectively, in two vertical movements from positions YM3 to YM5. Each fluctuation should not exceed 20mV. If it does, the alarm limit is increased by 50mV.

[0050] In step 44, based on the actual alarm range calculated in the previous step, the plus or minus adjustment parameter (i.e., the alarm range expansion value) is set in the signal display storage unit. Using the programming software on the computer, the compensation value in the alarm unit connection module is modified to be the same as the alarm range expansion value. After saving and exiting, the final setting of the signal shaping unit parameters is completed.

[0051] During the shutdown and overhaul of the power plant, the present invention pre-sets the parameters of the signal shaping unit according to the physical characteristics of the accelerometer equipment. The parameters of the independently designed signal shaping unit are set through four parts: initial condition setting, parameter pre-setting, bridge no-load and load testing, and final parameter adjustment and setting. The setting method comprehensively considers many factors such as the signal shaping unit, the physical characteristics of the accelerometer equipment, and the actual operating conditions of the bridge. The implementation method is efficient and reliable. After the bridge no-load and load tests, the parameters are finally modified and set according to the signal fluctuation. The parameter setting method described in the present invention is highly reliable and highly operational. During the operation of the unit, the signal shaping unit is stable and reliable, and the frequent alarms are greatly reduced. After summarizing the maintenance experience of several cycles, the maintenance and setting method steps are optimized and solidified, and the efficiency of the maintenance personnel and the maintenance quality are greatly improved, meeting the management requirements of the power station, and can provide signal shaping unit parameter setting methods and technical support for power plants with the same type of bridges.

[0052] While various embodiments of the present disclosure have been described above, the above descriptions are illustrative, non-exhaustive, and not intended to be limiting of the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for setting parameters of a bridge inclinometer signal shaping unit, characterized in that: The method comprises the following steps: Step A: Configure initial conditions. Measure and adjust the bridge track level and the height difference between the bridge and the maintenance area track. Set the readings of the two axis encoders on the long and short column sides of the bridge to the reference values. Use the three-point method to adjust the bridge inclinometer probe bracket so that the inclinometer probe output voltage reaches the preset value. Connect the host computer to the signal shaping unit. Find the shaping unit device in the host computer system menu and click it to enter the programming interface. Step B, configuring the alarm unit, includes: Step 21: In the input module of the host computer, select the measurement type as mV, the signal range as -1000mV to 1000mV, and configure single input channel 1. In the connection module of the host computer, adjust the gain of input channel 1 and set the gain to zero. Then, associate the gained signal with output channel 1. In output channel 1, set the compensation value to 0 and the gain multiplier to 1. Step 22: In the meter module of the host computer, select the linear signal for the signal shaping unit; in the analog output module, set the output type of output channel 1 to the current output range of 4.00 to 20.00 mA and the output limit of 3.80 to 20.50 mA; Step 23: In the alarm limit module of the host computer, set the alarm delay time to 2 seconds, the trigger alarm value to ±160mV, and the clear alarm value to ±159mV. In the alarm module, configure 4 relays and check the logic flip and alarm indicator light. Step 24: After all parameters are configured, the configured parameter data is downloaded to the alarm unit; Step C, signal display storage unit parameter configuration, including: Step 31: Enter the password on the display panel to enter the configuration settings; Step 32: In the input module, open input channel 1, select the channel type as current, the signal type as 4 to 20mA, the unit as mV, the decimal point as 0, the lower limit of the range as -1000, the upper limit of the range as 1000, the multiplier adjustment parameter as 1, the addition and subtraction adjustment parameter as 0, the filtering and cutoff as 0, and close other unused input channels; in the alarm module, set channel 1 to the open state, the relay delay to 2 seconds, the alarm return difference to 0, the preset probe alarm to ±160mV, and the upper and lower alarm limits to the maximum positive and negative values; Step 33: In the communication module, set the address to 001, the baud rate to 9600, and the byte swap value to 2143; in the transmitter module, set the transmitter channel to 01 and the source channel to 01; Step 34: After all parameters are set, save and exit the configuration interface to complete the setting of the signal display storage unit; The method further includes step D, final parameter adjustment, step D including steps 41 to 44; Step 41: Use a DC voltage source as a signal source and connect it to the signal input terminal of the bridge tilt signal shaping unit; adjust the voltage source to output a high voltage alarm setting value +0.001V, confirm that the high voltage alarm light on the signal shaping unit is on, and the high alarm signal of the signal display storage unit is triggered; adjust the voltage source to output a high voltage alarm setting value -0.001V, confirm that the high voltage alarm light on the signal shaping unit is off, and the high alarm signal of the signal display storage unit is eliminated; Step 42: Adjust the voltage source to output a low voltage alarm setting value of -0.001V, confirm that the low voltage alarm light on the signal shaping unit is on, and the low alarm signal of the signal display storage unit is triggered; adjust the voltage source to output a low voltage alarm setting value of +0.001V, confirm that the low voltage alarm light on the signal shaping unit is off, and the low alarm signal of the signal display storage unit is eliminated; Step 43: Drive the bridge function test. When the bridge is loaded with a loader and the loader is on bridge track XM11, it is driven by motors 1 and 2 respectively, and moves vertically from position YM3 to position YM5 twice. During the movement, the signal fluctuation of the display panel in front of the signal shaping unit is recorded. When the rear bridge is unloaded, it is driven by motors 1 and 2 respectively, and moves vertically from position YM3 to position YM5 twice. Each fluctuation value should not be greater than 20mV. If it exceeds 20mV, the alarm limit is increased by 50mV based on the fluctuation value. In step 44, based on the actual alarm range calculated in step 43, the plus or minus adjustment parameter, i.e., the expansion value of the alarm range, is set in the signal display storage unit; the compensation value in the alarm unit connection module is modified using programming software on the computer; the compensation value is the same as the expansion value of the alarm range; after saving and exiting, the final setting of the signal shaping unit parameters is completed.

2. The method according to claim 1, characterized in that In step 11, the bridge track is horizontally measured and adjusted so that the height difference of the bridge track in the long axis direction is less than 3mm, and the height difference in the short axis direction is less than 0.2mm; the height difference between the track on the bridge and the maintenance area track is measured and adjusted so that the bridge track is 0.75mm to 1.00mm higher than the maintenance area track.

3. The method according to claim 1, characterized in that In step 12, the readings of the two shaft encoders on the long column side and the short column side of the bridge are both set to 100, and the state where the readings of the two shaft encoders are both 100 is determined as the reference value of the bridge shaft encoder.

4. The method according to claim 1, wherein In step 13, the three-point method is used to adjust the bridge inclinometer probe bracket so that the inclinometer probe output voltage is 0V, and the state where the inclinometer probe output voltage is 0V is used as the reference point of the bridge inclinometer probe.

5. The method according to claim 1, wherein In step 14, use the host computer to connect to the signal shaping unit via a communication cable, open the communication management software, and configure the interface protocol to RS232 / RS485; the communication interface baud rate is 19200, the stop bit is 2, and the parity check is none; find the shaping unit device in the host computer system menu and click to enter the programming interface.

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