A rod position measurement signal output system and method

Abstract

The application relates to a rod position measurement signal output system and method, which comprises a rod position detector, a rod position measurement device and a safety level DCS signal acquisition system; the rod position detector is used for detecting the position of a control rod assembly and outputting a rod position signal; the rod position measurement device is connected with the rod position detector, used for receiving the rod position signal, processing the rod position signal and outputting a rod position measurement signal; the safety level DCS signal acquisition system is connected with the rod position measurement device, used for receiving the rod position measurement signal and executing a DCS protection function according to the rod position measurement signal. The rod position measurement device of the application has no requirement on the polarity of an external power supply when outputting externally. The application not only greatly improves the universality of the interface of the rod position measurement device, but also directly sends the nuclear safety level rod position signal to the safety level DCS signal acquisition system, so that the rod position measurement signal of the rod control and rod position system can be more widely used in the protection function of a power plant.

Description

A rod position measurement signal output system and method Technical Field

[0001] This invention relates to the technical field of pressurized water reactor rod position measurement, and more specifically, to a rod position measurement signal output system and method. Background Technology

[0002] Currently, the core reactivity control strategy in pressurized water reactor nuclear power plants typically employs control rod assemblies. By adjusting the insertion depth of these control rod assemblies within the core, rapid changes in core reactivity can be achieved, thereby enabling rapid adjustment of core power. This control process requires accurate measurement of the position of the control rod assemblies within the core to achieve closed-loop control of the target parameters. Since the control rod assemblies are installed inside the core in a harsh environment of high temperature, high pressure, and high radiation, direct measurement is usually impossible. Therefore, engineers often choose non-contact measurement methods to determine the position of the control rod assemblies within the core. Because the operation of the control rod assemblies is achieved by a control rod drive mechanism clamping and moving the control rod drive rod vertically, and the control rod drive rod and the control rod assembly are rigidly connected, the position of the control rod assembly can be measured by measuring the position of the tip of the control rod drive rod.

[0003] A commonly used technique involves mounting the rod position detector as a sleeve on the outside of the control rod drive. The control rod drive is made of a magnetic material, while the rod position sleeve is made of a non-magnetic material. As the control rod drive moves within the sleeve, an induced voltage is generated inside the rod position detector's coil. By collecting and analyzing these induced voltages, the height of the control rod within the reactor core is calculated, ultimately providing the measured rod position to guide maintenance personnel in subsequent operations.

[0004] In the existing technology, after the rod position measurement equipment converts the induced voltage of the rod position detector into a Grameen signal, it needs to be transmitted to the RGL (rod control and rod position system) rod position processing equipment or to the nuclear power plant DCS (digital control system) control system. This involves the interface problem between the two instrumentation and control devices.

[0005] In order to meet the requirements of electrical isolation, the electrical instrumentation and control equipment of nuclear power plants is usually equipped with isolation devices. Commonly accepted isolation devices in nuclear power include isolation amplifiers, current transformers, opto-couplers, relays, etc. For switching signals, relays and optocouplers are often selected as isolation components.

[0006] Different isolation components can be used for different stack types. For example, the RGL bar position measurement equipment used in a certain stack type uses optocouplers for isolation when outputting Grammy codes. In the output circuit design of this measurement equipment, to reduce terminal wiring, a design scheme was adopted where the five Grammy codes share a common collector (common positive terminal). Typically, the common digital input modules on the DCS side use intermediate relays for electrical isolation and employ a common negative terminal design. Therefore, when the DCS receives signals from the RGL bar position measurement equipment, an interface mismatch occurs. The relay coils for DCS signal acquisition are each located at the positive terminal of the circuit, but the five Grammy codes of RGL share a single positive power supply. This results in only one Grammy code being able to transmit normally; the other four digital signal acquisitions do not form a complete circuit, and thus, no signal can be acquired.

[0007] In summary, the current Grammage output method of rod position measurement equipment has the following drawbacks:

[0008] 1) Besides poor linearity and temperature stability, another significant drawback of optocouplers is their polarity requirement; the power supply must be wired according to their specified positive and negative terminals. This places certain demands on the interface devices of the other party, reducing the universality of their own interfaces.

[0009] 2) Another drawback of this design is the use of a common-terminal design for the five isolated optocouplers, which is one of the main reasons for the reduced interface versatility. If each Grammy signal could use a separate power supply loop, the aforementioned interface problem would not occur. However, using a separate loop for each signal would drastically increase the number of terminals, significantly consuming terminal resources. This is detrimental to optimizing the spatial arrangement of components within the cabinet.

[0010] 3) The rod position Glad code signal is processed by the rod position processing equipment and then sent to the DCS. Since the rod position processing equipment is a non-safety-grade instrumentation and control equipment, the signals processed by it are all non-safety-grade instrumentation and control signals. After being sent to the DCS, they can only participate in non-safety-grade functions and cannot participate in safety-grade protection functions. This seriously restricts the ability of RGL rod position measurement signals to participate in the multi-level protection of the power plant in the deep defense of the power plant. Summary of the Invention

[0011] The technical problem to be solved by the present invention is to provide a rod position measurement signal output system and method to address the shortcomings of the prior art.

[0012] The technical solution adopted by the present invention to solve its technical problem is: to construct a rod position measurement signal output system, including: a rod position detector, a rod position measurement device, and a safety-grade DCS signal acquisition system;

[0013] The rod position detector is used to detect the position of the control rod assembly and output a rod position signal;

[0014] The rod position measuring device is connected to the rod position detector and is used to receive the rod position signal, process the rod position signal and output the rod position measuring signal.

[0015] The safety-grade DCS signal acquisition system is connected to the rod position measurement device to receive the rod position measurement signal and perform DCS protection functions based on the rod position measurement signal.

[0016] In the rod position measurement signal output system of the present invention, the rod position measurement device includes: rod control and rod position system board;

[0017] The rod control and rod position system board includes: a first transmission link, a second transmission link, a third transmission link, a fourth transmission link, and a fifth transmission link;

[0018] The first transmission link is connected at its first end to the positive terminal of the first port of the security-grade DCS signal acquisition system; the second transmission link is connected at its first end to the positive terminal of the second port of the security-grade DCS signal acquisition system; the third transmission link is connected at its first end to the positive terminal of the third port of the security-grade DCS signal acquisition system; the fourth transmission link is connected at its first end to the positive terminal of the fourth port of the security-grade DCS signal acquisition system; and the fifth transmission link is connected at its first end to the positive terminal of the fifth port of the security-grade DCS signal acquisition system.

[0019] The second end of the first transmission link, the second end of the second transmission link, the second end of the third transmission link, the second end of the fourth transmission link, and the negative end of the fifth transmission link are connected to the negative end of the fifth port of the security-grade DCS signal acquisition system.

[0020] The positive terminals of the first port, the second port, the third port, the fourth port, and the fifth port are respectively connected to the power supply terminal of the safety-grade DCS, and the negative terminals of the first port, the second port, the third port, the fourth port, and the fifth port are respectively connected to the ground terminal of the safety-grade DCS.

[0021] In the rod position measurement signal output system of the present invention, the rod position measurement device further includes: a terminal block;

[0022] The terminal block includes: a first connecting terminal, a second connecting terminal, a third connecting terminal, a fourth connecting terminal, a fifth connecting terminal, and a sixth connecting terminal;

[0023] The first end of the first connection terminal is connected to the first end of the first transmission link, and the second end of the first connection terminal is connected to the positive end of the first port; the first end of the second connection terminal is connected to the first end of the second transmission link, and the second end of the second connection terminal is connected to the positive end of the second port; the first end of the third connection terminal is connected to the first end of the third transmission link, and the second end of the third connection terminal is connected to the positive end of the third port; the first end of the fourth connection terminal is connected to the first end of the fourth transmission link, and the second end of the fourth connection terminal is connected to the positive end of the fourth port; the first end of the fifth connection terminal is connected to the first end of the fifth transmission link, and the second end of the fifth connection terminal is connected to the positive end of the fifth port.

[0024] The second end of the first transmission link, the second end of the second transmission link, the second end of the third transmission link, the second end of the fourth transmission link, and the second end of the fifth transmission link are all connected to the first end of the sixth connection terminal, and the second end of the sixth connection terminal is connected to the negative end of the fifth port.

[0025] In the rod position measurement signal output system of the present invention, the first transmission link, the second transmission link, the third transmission link, the fourth transmission link and the fifth transmission link are parallel structures and independent of each other.

[0026] In the rod position measurement signal output system of the present invention, the first transmission link, the second transmission link, the third transmission link, the fourth transmission link and the fifth transmission link all include: an optical MOS component; the optical MOS component is used to perform electrical isolation of the signal.

[0027] In the rod position measurement signal output system of the present invention, the safety-grade DCS signal acquisition system includes: a first data acquisition module, a second data acquisition module, a third data acquisition module, a fourth data acquisition module, and a fifth data acquisition module;

[0028] The first data acquisition module is disposed between the first port and the power supply terminal of the safety-grade DCS signal acquisition system; the second data acquisition module is disposed between the second port and the power supply terminal of the safety-grade DCS signal acquisition system; the third data acquisition module is disposed between the third port and the power supply terminal of the safety-grade DCS signal acquisition system; the fourth data acquisition module is disposed between the fourth port and the power supply terminal of the safety-grade DCS signal acquisition system; and the fifth data acquisition module is disposed between the fifth port and the power supply terminal of the safety-grade DCS signal acquisition system.

[0029] In the rod position measurement signal output system of the present invention, the first data acquisition module includes: a first relay; the second data acquisition module includes: a second relay; the third data acquisition module includes: a third relay; the fourth data acquisition module includes: a fourth relay; and the fifth data acquisition module includes: a fifth relay.

[0030] The input terminal of the coil of the first relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system, and the output terminal of the coil of the first relay is connected to the positive terminal of the first port. The input terminal of the coil of the second relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system, and the output terminal of the coil of the second relay is connected to the positive terminal of the second port. The input terminal of the third relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system, and the output terminal of the third relay is connected to the positive terminal of the third port. The input terminal of the fourth relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system, and the output terminal of the fourth relay is connected to the positive terminal of the fourth port. The input terminal of the fifth relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system, and the output terminal of the fifth relay is connected to the positive terminal of the fifth port.

[0031] The rod position measurement signal output system of the present invention also includes: rod position processing equipment and non-safety grade DCS system;

[0032] The rod position processing device is used to convert the rod position measurement signal and output it to the non-safety grade DCS system;

[0033] The non-connected component is used to display and control the rod position signals processed by the rod position processing device.

[0034] The present invention also provides a method for outputting a rod position measurement signal, comprising the following steps:

[0035] The rod position detector detects the position of the control rod assembly and outputs a rod position signal;

[0036] The rod position measuring device receives the rod position signal, processes the rod position signal, and outputs the rod position measuring signal.

[0037] The safety-grade DCS signal acquisition system receives the rod position measurement signal and performs DCS protection functions based on the rod position measurement signal.

[0038] In the rod position measurement signal output method of the present invention, the method further includes:

[0039] The rod position processing device converts and processes the rod position measurement information;

[0040] The non-safety grade DCS system receives the rod position signal processed by the rod position processing device and displays and controls the rod position signal.

[0041] The rod position measurement signal output system and method of the present invention have the following beneficial effects: It includes a rod position detector, a rod position measurement device, and a safety-grade DCS signal acquisition system; the rod position detector is used to detect the position of the control rod assembly and output a rod position signal; the rod position measurement device is connected to the rod position detector, used to receive the rod position signal, process the rod position signal, and output the rod position measurement signal; the safety-grade DCS signal acquisition system is connected to the rod position measurement device, used to receive the rod position measurement signal, and execute DCS protection functions based on the rod position measurement signal. When using the rod position measurement device of the present invention for external output, there are no requirements for power supply polarity. The present invention not only greatly improves the universality of the rod position measurement device interface, but also directly sends nuclear safety-grade rod position signals to the safety-grade DCS signal acquisition system, enabling rod control and rod position system rod position measurement signals to participate more extensively in the protection functions of the power plant. Attached Figure Description

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0043] Figure 1 is a schematic diagram of the rod position measurement signal output system provided in an embodiment of the present invention;

[0044] Figure 2 is a schematic diagram of the interface of the rod position measurement signal output system provided in an embodiment of the present invention;

[0045] Figure 3 is a flowchart illustrating the rod position measurement signal output method provided in an embodiment of the present invention. Detailed Implementation

[0046] 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.

[0047] This invention provides a system for optimizing the output of the glyph code in bar position measurement. This system greatly improves the versatility of the interface without introducing more components or occupying the space inside the original cabinet. The system improves the versatility of the bar position measurement device 12, making it easier for more users to use the bar position measurement signal.

[0048] In a preferred embodiment, referring to FIG1, the rod position measurement signal output system provided by the present invention includes: rod position detector 11, rod position measurement device 12, and safety-grade DCS signal acquisition system 13.

[0049] The rod position detector 11 is used to detect the position of the control rod assembly and output a rod position signal. In this embodiment of the invention, the rod position detector 11 is a five-bit Grammy code detector. Alternatively, the rod position signal output by the rod position detector 11 is five sets of induced voltage signals characterizing the position features of the bundle control rod assembly.

[0050] Specifically, the rod position detector 11 is a differential transformer-type rod position detection device consisting of a primary coil and 31 secondary coils. The primary coil contains a sinusoidal alternating current to provide a stable magnetic field. The 31 secondary coils are evenly spaced outside the primary coil, with their planes perpendicular to the central axis of the primary coil. When the metal control rod drive lever enters the rod position detector 11 from one side and gradually moves to the other, an induced voltage is generated in the secondary coils. Because the winding directions of the different secondary coils are inconsistent, the directions of the induced voltages generated by the secondary coils at different positions are also different. Since the 31 secondary coils are divided into 5 groups, and the number of coils in each group is also different, the rod position detector 11 will ultimately output five sets of induced voltage signals. As the control rod drive lever changes position, the rod position detector 11 provides five induced voltage signals that characterize the positional features of a control rod assembly.

[0051] The rod position measuring device 12 is connected to the rod position detector 11 to receive the rod position signal, process the rod position signal and output the rod position measuring signal.

[0052] Specifically, the rod position measuring device 12 directly receives five sets of induced voltage signals output by the rod position detector 11, and performs shaping, filtering, threshold comparison and other processing on the five sets of induced voltage signals to form a five-bit Grady code signal, and transmits the output five-bit Grady code signal to the safety-grade DCS signal acquisition system 13.

[0053] The safety-grade DCS signal acquisition system 13 is connected to the rod position measurement device 12 to receive rod position measurement signals and execute DCS protection functions based on the rod position measurement signals. By directly transmitting the safety-grade rod position Grady code signal to the power plant's safety-grade DCS signal acquisition system 13, it can be converted into decimal rod position within the safety-grade DCS signal acquisition system 13 before participating in the protection function.

[0054] Furthermore, as shown in Figure 1, the rod position measurement signal output system also includes: rod position processing equipment 14 and a non-safety-grade DCS system 15.

[0055] The rod position processing device 14 is used to convert the rod position measurement signal for output to the non-safety-grade DCS system 15. Specifically, in this embodiment of the invention, the rod position processing device 14 receives five sets of Grammy code signals output by the rod position measurement device 12 and converts them into decimal rod positions for subsequent display and control.

[0056] The non-security-grade DCS system 15 is connected to the rod position processing device 14 and is used to display and control the rod position signals processed by the rod position processing device 14. Specifically, in this embodiment of the invention, the non-security-grade DCS system receives five sets of Grammy code signals transmitted by the rod position processing device 14 and participates in non-security-grade functions based on the received five sets of Grammy code signals.

[0057] In a preferred embodiment, as shown in FIG2, the rod position measuring device 12 includes: rod control and rod position system board 121.

[0058] The rod control and rod position system board 121 includes: a first transmission link 1201, a second transmission link 1202, a third transmission link 1203, a fourth transmission link 1204, and a fifth transmission link 1205.

[0059] The positive terminal of the first transmission link 1201 is connected to the positive terminal of the first port 1301 of the security-grade DCS signal acquisition system 13; the positive terminal of the second transmission link 1202 is connected to the positive terminal of the second port 1302 of the security-grade DCS signal acquisition system 13; the positive terminal of the third transmission link 1203 is connected to the positive terminal of the third port 1303 of the security-grade DCS signal acquisition system 13; the positive terminal of the fourth transmission link 1204 is connected to the positive terminal of the fourth port 1304 of the security-grade DCS signal acquisition system 13; and the positive terminal of the fifth transmission link 1205 is connected to the positive terminal of the fifth port 1305 of the security-grade DCS signal acquisition system 13. The negative terminals of the first transmission link 1201, the second transmission link 1202, the third transmission link 1203, the fourth transmission link 1204, and the fifth transmission link 1205 are connected to the negative terminal of the fifth port 1305 of the security-grade DCS signal acquisition system 13.

[0060] The positive terminals of the first port 1301, the second port 1302, the third port 1303, the fourth port 1304, and the fifth port 1305 are respectively connected to the power supply terminal of the safety-grade DCS. The negative terminals of the first port 1301, the second port 1302, the third port 1303, the fourth port 1304, and the fifth port 1305 are respectively connected to the ground terminal of the safety-grade DCS (ground -0V in Figure 2).

[0061] Furthermore, as shown in Figure 2, the rod position measuring device 12 also includes a terminal block 122.

[0062] Terminal block 122 includes: a first connecting terminal 1211, a second connecting terminal 1212, a third connecting terminal 1213, a fourth connecting terminal 1214, a fifth connecting terminal 1215, and a sixth connecting terminal 1216.

[0063] The first end of the first connection terminal 1211 is connected to the positive end of the first transmission link 1201, and the second end of the first connection terminal 1211 is connected to the positive end of the first port 1301; the first end of the second connection terminal 1212 is connected to the positive end of the second transmission link 1202, and the second end of the second connection terminal 1212 is connected to the positive end of the second port 1302; the first end of the third connection terminal 1213 is connected to the positive end of the third transmission link 1203, and the second end of the third connection terminal 1213 is connected to the positive end of the third port 1303; the first end of the fourth connection terminal 1214 is connected to the positive end of the fourth transmission link 1204, and the second end of the fourth connection terminal 1214 is connected to the positive end of the fourth port 1304; the first end of the fifth connection terminal 1215 is connected to the positive end of the fifth transmission link 1205, and the second end of the fifth connection terminal 1215 is connected to the positive end of the fifth port 1305.

[0064] The negative terminals of the first transmission link 1201, the second transmission link 1202, the third transmission link 1203, the fourth transmission link 1204, and the fifth transmission link 1205 are all connected to the first terminal of the sixth connection terminal 1216, and the second terminal of the sixth connection terminal 1216 is connected to the negative terminal of the fifth port 1305.

[0065] Alternatively, in this embodiment of the invention, the first transmission link 1201, the second transmission link 1202, the third transmission link 1203, the fourth transmission link 1204, and the fifth transmission link 1205 are parallel structures and independent of each other.

[0066] Optionally, in this embodiment of the invention, the first transmission link 1201, the second transmission link 1202, the third transmission link 1203, the fourth transmission link 1204, and the fifth transmission link 1205 all include an optical MOS device. The optical MOS device is used to perform electrical isolation of the signal.

[0067] In this embodiment of the invention, the optical MOS device includes: a first field-effect transistor, a second field-effect transistor, a first diode, a second diode, and a light-emitting diode. In this embodiment, electrical isolation is achieved by using an optical MOS device, maintaining the original isolation effect while also addressing the shortcomings of the original optocoupler. Specifically, an optical MOS device consisting of two gold-oxide-semiconductor field-effect transistors, two diodes, and one light-emitting diode replaces the original optocoupler. The two gold-oxide-semiconductor field-effect transistors in this optical MOS device are source-coupled, enabling bidirectional switching capability and eliminating polarity requirements for the power supply in the electrical circuit. Therefore, this invention, by using this optical MOS device for signal isolation output, eliminates the need for power supply polarity requirements during interface transmission.

[0068] As shown in Figure 2, the safety-grade DCS signal acquisition system 13 includes: a first data acquisition module 1311, a second data acquisition module 1312, a third data acquisition module 1313, a fourth data acquisition module 1314, and a fifth data acquisition module 1315.

[0069] The first data acquisition module 1311 is located between the first port 1301 and the power supply terminal (+24VDC in Figure 2) of the safety-grade DCS signal acquisition system 13. The second data acquisition module 1312 is located between the second port 1302 and the power supply terminal of the safety-grade DCS signal acquisition system 13. The third data acquisition module 1313 is located between the third port 1303 and the power supply terminal of the safety-grade DCS signal acquisition system 13. The fourth data acquisition module 1314 is located between the fourth port 1304 and the power supply terminal of the safety-grade DCS signal acquisition system 13. The fifth data acquisition module 1315 is located between the fifth port 1305 and the power supply terminal of the safety-grade DCS signal acquisition system 13.

[0070] Optionally, in some embodiments, the first data acquisition module 1311 includes a first relay; the second data acquisition module 1312 includes a second relay; the third data acquisition module 1313 includes a third relay; the fourth data acquisition module 1314 includes a fourth relay; and the fifth data acquisition module 1315 includes a fifth relay.

[0071] The input terminal of the coil of the first relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system 13, and the output terminal of the coil of the first relay is connected to the positive terminal of the first port 1301. The input terminal of the coil of the second relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system 13, and the output terminal of the coil of the second relay is connected to the positive terminal of the second port 1302. The input terminal of the third relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system 13, and the output terminal of the third relay is connected to the positive terminal of the third port 1303. The input terminal of the fourth relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system 13, and the output terminal of the fourth relay is connected to the positive terminal of the fourth port 1304. The input terminal of the fifth relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system 13, and the output terminal of the fifth relay is connected to the positive terminal of the fifth port 1305. In this embodiment of the invention, the first, second, third, fourth, and fifth relays share a common negative terminal.

[0072] Specifically, as shown in Figure 2, the five sets of Grammy code signals output by the rod position measuring device 12 (channels A, B, C, D, and E in the figure) are electrically isolated using optical MOS components for each set of Grammy code signals. As shown in Figure 2, the five receiving links are independent of each other and are independently connected to the positive terminal of the power supply, thus forming five loops and ensuring the normal transmission of the five sets of Grammy code signals.

[0073] The rod position measurement signal output system of this invention greatly improves the application range of rod position signals, enabling them to participate more extensively in the safety protection functions of various levels of nuclear power plant defense-in-depth. The original RGL system (rod control and rod position system) design involved sending the rod position measurement system detector to the RGL rod position measurement cabinet, then to the RGL rod position processing cabinet, and finally to the DCS system via a gateway. This resulted in non-safety-grade rod position signals, limiting their participation in the power plant's protection functions. The rod position measurement system designed in this invention can simultaneously send the rod position Grady code signal to the rod position processing device 14 and the safety-grade DCS signal acquisition system 13, allowing the power plant to obtain safety-grade rod position signals and laying the foundation for subsequent rod position participation in protection functions.

[0074] Referring to Figure 3, a flowchart illustrating a preferred embodiment of the rod position measurement signal output method provided by the present invention is shown. This rod position measurement signal output method can be applied to the rod position measurement signal output system of the present invention.

[0075] Specifically, as shown in Figure 3, the method for outputting the rod position measurement signal includes the following steps:

[0076] Step S301: The rod position detector 11 detects the position of the control rod assembly and outputs the rod position signal.

[0077] Step S302: The rod position measuring device 12 receives the rod position signal, processes the rod position signal, and outputs the rod position measuring signal.

[0078] Step S303: The safety-grade DCS signal acquisition system 13 receives the rod position measurement signal and executes the DCS protection function according to the rod position measurement signal.

[0079] Furthermore, the rod position measurement signal output method of the present invention further includes: the rod position processing device 14 converting and processing the rod position measurement information; and the non-safety grade DCS system 15 receiving the rod position signal processed by the rod position processing device 14 and displaying and controlling the rod position signal.

[0080] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0081] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0082] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0083] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They do not limit the scope of protection of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A rod position measurement signal output system, characterized in that, include: The system includes a rod position detector, a rod position measurement device, and a safety-grade DCS signal acquisition system. The rod position detector is used to detect the position of the control rod assembly and output a rod position signal. The rod position detector is a five-bit Grammy code detector, and the rod position signal output by the detector consists of five sets of induced voltage signals characterizing the position of the bundle control rod assembly. The rod position measurement device is connected to the rod position detector and is used to receive the rod position signal, process the signal, and output a rod position measurement signal. The rod position measurement device includes a rod control and rod position system board. The rod control and rod position system board includes a first transmission link, a second transmission link, a third transmission link, a fourth transmission link, and a fifth transmission link. The first transmission link, the... The second, third, fourth, and fifth transmission links are parallel structures and independent of each other; the first, second, third, fourth, and fifth transmission links adopt a common negative terminal design; each of the first, second, third, fourth, and fifth transmission links includes an optical MOS component; the optical MOS component is used to perform electrical isolation of the signal; the safety-grade DCS signal acquisition system is connected to the rod position measurement device to receive the rod position measurement signal and perform DCS protection functions according to the rod position measurement signal.

2. The rod position measurement signal output system according to claim 1, characterized in that, The first end of the first transmission link is connected to the positive terminal of the first port of the safety-grade DCS signal acquisition system; the first end of the second transmission link is connected to the positive terminal of the second port of the safety-grade DCS signal acquisition system; the first end of the third transmission link is connected to the positive terminal of the third port of the safety-grade DCS signal acquisition system; the first end of the fourth transmission link is connected to the positive terminal of the fourth port of the safety-grade DCS signal acquisition system; and the first end of the fifth transmission link is connected to the positive terminal of the fifth port of the safety-grade DCS signal acquisition system. The second ends of the first, second, third, fourth, and fifth transmission links are connected to the negative terminal of the fifth port of the safety-grade DCS signal acquisition system. The positive terminals of the first, second, third, fourth, and fifth ports are respectively connected to the power supply terminal of the safety-grade DCS signal acquisition system, and the negative terminals of the first, second, third, fourth, and fifth ports are respectively connected to the ground terminal of the safety-grade DCS.

3. The rod position measurement signal output system according to claim 2, characterized in that, The rod position measuring device further includes: a terminal block; the terminal block includes: a first connecting terminal, a second connecting terminal, a third connecting terminal, a fourth connecting terminal, a fifth connecting terminal, and a sixth connecting terminal; the first end of the first connecting terminal is connected to the first end of the first transmitting link, and the second end of the first connecting terminal is connected to the positive end of the first port; the first end of the second connecting terminal is connected to the first end of the second transmitting link, and the second end of the second connecting terminal is connected to the positive end of the second port; the first end of the third connecting terminal is connected to the first end of the third transmitting link, and the second end of the third connecting terminal is connected to the positive end of the third port; the first end of the fourth connecting terminal is connected to the first end of the fourth transmitting link, and the second end of the fourth connecting terminal is connected to the positive end of the fourth port; the first end of the fifth connecting terminal is connected to the first end of the fifth transmitting link, and the second end of the fifth connecting terminal is connected to the positive end of the fifth port; the second ends of the first transmitting link, the second ends of the second transmitting link, the second ends of the third transmitting link, the second ends of the fourth transmitting link, and the second ends of the fifth transmitting link are all connected to the first end of the sixth connecting terminal, and the second end of the sixth connecting terminal is connected to the negative end of the fifth port.

4. The rod position measurement signal output system according to claim 2, characterized in that, The safety-grade DCS signal acquisition system includes: a first data acquisition module, a second data acquisition module, a third data acquisition module, a fourth data acquisition module, and a fifth data acquisition module; the first data acquisition module is disposed between the first port and the power supply terminal of the safety-grade DCS signal acquisition system, the second data acquisition module is disposed between the second port and the power supply terminal of the safety-grade DCS signal acquisition system, the third data acquisition module is disposed between the third port and the power supply terminal of the safety-grade DCS signal acquisition system, the fourth data acquisition module is disposed between the fourth port and the power supply terminal of the safety-grade DCS signal acquisition system, and the fifth data acquisition module is disposed between the fifth port and the power supply terminal of the safety-grade DCS signal acquisition system.

5. The rod position measurement signal output system according to claim 4, characterized in that, The first data acquisition module includes a first relay; the second data acquisition module includes a second relay; the third data acquisition module includes a third relay; the fourth data acquisition module includes a fourth relay; and the fifth data acquisition module includes a fifth relay. The input terminal of the coil of the first relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system, and the output terminal of the coil of the first relay is connected to the positive terminal of the first port. The input terminal of the coil of the second relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system, and the output terminal of the coil of the second relay is connected to the positive terminal of the second port. The input terminal of the third relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system, and the output terminal of the third relay is connected to the positive terminal of the third port. The input terminal of the fourth relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system, and the output terminal of the fourth relay is connected to the positive terminal of the fourth port. The input terminal of the fifth relay is connected to the power supply terminal of the safety-grade DCS signal acquisition system, and the output terminal of the fifth relay is connected to the positive terminal of the fifth port.

6. The rod position measurement signal output system according to claim 1, characterized in that, Also includes: A rod position processing device and a non-safety-grade DCS system; the rod position processing device is used to convert the rod position measurement signal and output it to the non-safety-grade DCS system; the non-safety-grade DCS system is connected to the rod position processing device and is used to display and control the rod position signal processed by the rod position processing device.

7. A method for outputting a rod position measurement signal, characterized in that, Includes the following steps: A rod position detector detects the position of the control rod assembly and outputs a rod position signal. The rod position detector is a five-bit Grammy code detector, and the output rod position signal consists of five sets of induced voltage signals characterizing the position of the bundle control rod assembly. A rod position measurement device receives the rod position signal, processes it, and outputs a rod position measurement signal. The rod position measurement device includes a rod control and rod position system board. The rod control and rod position system board includes a first transmission link, a second transmission link, a third transmission link, a fourth transmission link, and a fifth transmission link. The first transmission link, the second transmission link, the third transmission link, and the fifth transmission link... The first, second, third, fourth, and fifth transmission links are parallel structures and independent of each other; the first, second, third, fourth, and fifth transmission links share a common negative terminal design; each of the first, second, third, fourth, and fifth transmission links includes an optical MOS component; the optical MOS component is used to perform electrical isolation of the signal; the safety-grade DCS signal acquisition system receives the rod position measurement signal and performs DCS protection functions based on the rod position measurement signal.

8. The rod position measurement signal output method according to claim 7, characterized in that, The method further includes: a rod position processing device converting and processing the rod position measurement information; and a non-safety-grade DCS system receiving the rod position signal processed by the rod position processing device and displaying and controlling the rod position signal.

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