Ship power device signal alarm system and processing method

Abstract

The invention relates to a ship power device signal alarm system and a processing method, the ship power device signal alarm system comprises a water level signal probe, the water level signal probe comprises two independent electric contact probes, the positive ends of the two electric contact probes are respectively connected to an input port of a signal alarm device, and the electric contact probes are used for transmitting water level state signals; the signal alarm device comprises a first shielding case and a second shielding case, the first shielding case is connected with a transmission storage device, an operator, an alarm light indicator and an alarm bell through a backboard electric connector, and a power module, an alarm signal processing module and a data transmission module are integrated in the first shielding case. The power supply module provides direct current power supply for the alarm signal processing module and the data transmission module. The problems that in a traditional ship power device alarm system, the corresponding water level probe signal alarm comprehensive performance is low, and the actual use requirement cannot be met can be solved.

Description

Technical Field

[0001] The present application relates to the field of ship power system alarm and monitoring, and specifically to a ship power unit signal alarm system and processing method. Background Art

[0002] During the operation of a ship, when leakage or water accumulation occurs in the main equipment of the power unit or the water level in the bilge exceeds the limit, it is particularly important to be able to promptly remind the operator through light and sound signals to analyze and judge and take necessary measures and means in time to quickly eliminate the fault and ensure the safe and reliable operation of the power unit. Therefore, a highly reliable and fully functional signal alarm processing system is required.

[0003] In the related technology, the comprehensive performance of the traditional ship power plant alarm system is low and cannot meet the actual use requirements. Summary of the invention

[0004] The present application provides a ship power plant signal alarm system and processing method, which can solve the technical problem that the comprehensive performance of the traditional ship power plant alarm system is low and cannot meet the actual use requirements.

[0005] In a first aspect, an embodiment of the present application provides a ship power plant signal alarm system, which includes: A water level signal probe, the water level signal probe comprising two independent electrical contact probes, the positive ends of the two electrical contact probes are respectively connected to the input ports of the signal alarm device, which are used to transmit the water level status signal; The signal alarm device comprises a shielded chassis 1 and a shielded chassis 2, wherein the shielded chassis 1 is connected to a transmission storage device, an operator, an alarm light sign and an alarm bell via a backplane electrical connector, and internally integrates a power module, an alarm signal processing module and a data transmission module, wherein the power module provides DC power supply for the alarm signal processing module and the data transmission module, the alarm signal processing module communicates with the data transmission module via a bus, and the data transmission module is connected to the transmission storage device via a serial interface; The shielded chassis 2 is connected to the water level signal probe via a backplane electrical connector, and has an integrated water level signal conversion module and a transformer. The transformer provides AC power to the water level signal probe, and the water level signal conversion module is connected to the input port of the alarm signal processing module.

[0006] In combination with the first aspect, in one embodiment, the transmission and storage device is connected to the backplane electrical connector of the shielded chassis 1 via a shielded cable, and is used to receive and store alarm information on leakage or water accumulation of important equipment in the ship's power plant and excessive bilge water level transmitted by the alarm signal processing module.

[0007] In combination with the first aspect, in one implementation, the alarm light sign is connected to the output port of the alarm signal processing module of the shielding chassis 1 via a cable, and its green, yellow and red lights are driven by the three-level alarm logic of the alarm signal processing module respectively.

[0008] In combination with the first aspect, in one embodiment, the operator is connected to the input port of the alarm signal processing module of the shielded chassis through a cable, and its light check button, light extinguishing button, ring extinguishing button and light check switch respectively trigger the detection, light extinguishing, ring extinguishing and loop output check functions of the alarm signal processing module.

[0009] In combination with the first aspect, in one implementation, the alarm bell is connected to the audio output port of the alarm signal processing module of the shielded chassis 1 via a cable, and the sound is driven by the alarm signal processing module.

[0010] In combination with the first aspect, in one implementation, the water level signal conversion module includes: a self-checking circuit, a probe input circuit, a rectification and threshold comparison circuit, a conduction and driving circuit, and a relay contact output circuit; The input end of the self-check circuit is selectively connected to the standard resistor analog water level probe signal through a switching switch, and the output end is coupled to the signal detection node of the probe input circuit, and is used to simulate the low-resistance conduction state of the probe through the standard resistor in the self-check mode; The input end of the probe input circuit is electrically connected to the electrode of the water level signal probe, and the output end thereof is connected to the control end of the conduction and drive circuit after being processed by the rectification and threshold comparison circuit, and the rectification and threshold comparison circuit is configured to rectify the probe signal and output a conduction control signal according to a preset threshold jumper; The control end of the conduction and driving circuit is electrically connected to the output end of the rectification and threshold comparison circuit, and its driving end is electrically connected to the coil of the relay contact output circuit, and is used to drive the relay coil to be energized or de-energized according to the conduction control signal. Its leakage, water accumulation, and high water level alarm signal ports are connected to the normally open contacts of the relay contact output circuit, and its low water level alarm signal port is connected to its normally closed contacts.

[0011] In combination with the first aspect, in one implementation, the alarm signal processing module includes a microprocessor, an input circuit, an output isolation circuit, a feedback compliance circuit, a de-jitter isolation circuit, a self-recovery circuit, and a bus interface; The input end of the input circuit is electrically connected to the output end of the water level signal conversion module, and the output end thereof is connected to the signal acquisition port of the microprocessor via the photoelectric isolation circuit in turn, for receiving external signals and performing electrical isolation; The output end of the microprocessor is connected to an audio output port and an alarm light sign output port via the output isolation circuit, and is used to generate an acoustic alarm signal and an optical alarm signal respectively; The input end of the feedback coincidence circuit is electrically connected to the state feedback end of the alarm light sign, and the output end thereof is fed back to the fault diagnosis port of the microprocessor, so as to verify the consistency of the input signal and the output signal through the on and off state of the light sign, and detect the line connection fault of the alarm system; The de-jitter isolation circuit is connected between the microprocessor and the operator, and the self-recovery circuit is connected to the microprocessor; The communication end of the bus interface is electrically connected to the data port of the microprocessor, and the interface end is connected to the data transmission module through the bus, so as to upload the alarm signal and system status data to the external device.

[0012] In a second aspect, an embodiment of the present application provides a method for processing a signal alarm system of a ship power plant as described in some of the above embodiments, which comprises the following steps: Receive the contact signal sent by the water level signal conversion module, and convert the contact signal into the corresponding normally open / normally closed contact logic based on the water level state and leakage state detected by the water level signal probe; The input contact signal is isolated and filtered, and the signal consistency verification based on continuous multiple sampling is performed by the microprocessor. When the sampling signal is consistent for N consecutive times, it is determined to be a valid alarm signal; Dynamically control the alarm light sign display mode and alarm bell excitation logic according to the input status of the light check signal, bell elimination signal and light elimination signal; The actual status of the alarm light sign is compared with the input alarm signal in real time. If there is any inconsistency, the system fault indicator light is activated, and the alarm information and fault status are transmitted to the external monitoring device through the bus.

[0013] In combination with the second aspect, in one embodiment, the input contact signal is isolated and filtered, and a signal consistency verification based on multiple consecutive samplings is performed by a microprocessor, and when the sampling signal is consistent for N consecutive times, it is determined to be a valid alarm signal, including: Perform photoelectric isolation and de-jitter processing on the input signal; Adopt fixed period sampling, when the sampling values ​​are the same for 12 times in a row, it is judged as a true signal; If the sampling values ​​do not reach consistency, restart the sampling process until a valid signal is obtained.

[0014] In combination with the second aspect, in one implementation, the actual state of the alarm light sign is compared with the input alarm signal in real time, if there is inconsistency, the system fault indicator light is activated, and the alarm information and fault state are transmitted to the external monitoring device through the bus, including: Sort the alarm information by alarm signal processing module and generate standardized data packets; Transmit data packets to external monitoring equipment through the bus interface, and synchronously store alarm information and status comparison results; When it is detected that the alarm light sign state conflicts with the input signal logic, the self-recovery mechanism is triggered to force the microprocessor to reset to the initial state.

[0015] The beneficial effects brought by the technical solution provided by the embodiments of the present application include: (1) The water level signal probe uses two independent electrical contact probes, whose positive ends are respectively connected to the input ports of the signal alarm device to transmit the water level status signal. Through the design of two independent electrical contact probes, the system can effectively avoid false alarms or missed alarms caused by single probe failure, thereby improving the reliability of the alarm system; (2) The core components such as the power module and the alarm signal processing module are integrated into the shielded chassis 1, while the water level signal conversion module and the AC power transformer are independently packaged in the shielded chassis 2. The two chassis are isolated by the backplane electrical connector to block the crosstalk of the AC power supply noise to the signal processing circuit. At the same time, the shielded chassis structure effectively resists the strong electromagnetic interference and moisture corrosion in the ship environment; (3) The alarm signal processing module communicates efficiently with the data transmission module through the bus, reducing the complexity and interference risk of traditional parallel wiring; the water level signal conversion module adopts a jumper selection circuit to support flexible configuration of input signal types (such as probe signals with different resistance values) to adapt to different interface requirements for high or low signals; (4) Support priority response logic for light check, bell elimination, and light extinguishing signals, such as forcibly lighting up the light sign for equipment self-check, or quickly shutting off the alarm according to the bell elimination signal. After the alarm information is standardized and sorted by the data transmission module, it is uploaded to the external monitoring device through the serial interface to realize remote status monitoring and historical data storage, which is convenient for fault tracing; (5) The backplane electrical connector design enables the modules inside the shielded chassis to be plugged in and replaced without rewiring; the power module independently supplies power to the alarm processing and data transmission modules to avoid overall system paralysis due to local circuit failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A structural block diagram of a signal alarm system for a ship power plant provided by an embodiment of the present invention; Figure 2 This is a structural block diagram of a water level signal conversion module, an alarm signal processing module and a data transmission module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] The embodiment of the present application provides a ship power plant signal alarm system and processing method, which can solve the technical problem that the comprehensive performance of the traditional ship power plant alarm system is low and cannot meet the actual use requirements.

[0020] First, as Figure 1 As shown, an embodiment of the present application provides a signal alarm system for a ship power plant, which includes: a water level signal probe, the water level signal probe is a dual-probe detection mode, the positive ends of the electric contact probes are respectively connected to the input ports of the signal alarm device, which are used to transmit water level status signals; the signal alarm device includes a shielded chassis 1 and a shielded chassis 2, the shielded chassis 1 is connected to a transmission storage device, an operator, an alarm light sign and an alarm bell through a backplane electrical connector, and a power module, an alarm signal processing module and a data transmission module are integrated therein, the power module provides DC power supply for the alarm signal processing module and the data transmission module, the alarm signal processing module communicates with the data transmission module through a bus, and the data transmission module is connected to the transmission storage device through a serial interface; the shielded chassis 2 is connected to the water level signal probe through a backplane electrical connector, and a water level signal conversion module and a transformer are integrated therein, the transformer provides AC power supply for the water level signal probe, and the water level signal conversion module is connected to the input port of the alarm signal processing module.

[0021] In this embodiment, the water level signal probe uses two independent electrical contact probes, and the positive end branch is connected to the signal alarm device; the signal alarm device is divided into shielded chassis 1 and shielded chassis 2, chassis 1 integrates the alarm processing core module (power supply, alarm processing, data transmission), and chassis 2 independently encapsulates the water level signal conversion module and the AC power supply transformer, and the two are isolated and connected through the backplane electrical connector; the alarm signal processing module communicates efficiently with the data transmission module through the bus to reduce signal interference; the water level signal conversion module adapts to input signals with different contact logic (normally open / normally closed) through a jumper selection circuit; the power supply module in chassis 1 provides DC power supply for the alarm processing and data transmission modules, and the transformer in chassis 2 provides AC power supply for the water level probe to achieve physical isolation of AC and DC power supplies; the alarm signal processing module collects the status of the alarm light sign in real time and triggers system fault diagnosis; it supports responses to light check signals (forced lighting of the light sign), bell elimination signals (turning off the alarm bell), and light elimination signals (extinguishing the light sign). Among them, the two positive poles of the dual-electric contact probe are connected to the signal alarm device, the spacing between the two probe electrodes can be adjusted, and the interference signal of the ship's shell is not substituted into the system, which improves the anti-interference performance compared with a single probe; Chassis 1 and Chassis 2 are physically separated to block the crosstalk of AC power noise to the digital signal processing module; the backplane electrical connector isolates the high / low voltage circuit to reduce common mode interference; through the alarm light sign status feedback, the line break, short circuit or signal logic abnormality is diagnosed in real time, and the fault indicator alarm is triggered to reduce manual troubleshooting time; the jumper selection supports signals with different dielectric resistance values, and the circuit supports flexible configuration of water level signal types (such as high / low water level) to adapt to different needs; the backplane electrical connector design makes the module pluggable and replaceable to reduce maintenance costs; the alarm signal processing module and the data transmission module use a bus communication protocol to replace traditional parallel wiring, reduce line complexity and signal attenuation, and improve data transmission efficiency; the shielded chassis structure has a high protection level and effectively resists salt spray corrosion, vibration and high temperature in the ship environment; AC and DC split power supply avoids power coupling failure and improves system stability; the power module uses high-efficiency DC conversion technology to reduce heat generation.

[0022] In combination with the first aspect, in one embodiment, the transmission and storage device is connected to the backplane electrical connector of the shielded chassis 1 via a shielded cable, and is used to receive and store alarm information on leakage or water accumulation of important equipment in the ship's power plant and excessive bilge water level transmitted by the alarm signal processing module.

[0023] In this embodiment, the shielded cable has excellent anti-interference ability, can effectively resist external electromagnetic interference, and ensure the integrity and accuracy of the data. In the scene of the ship with complex electromagnetic environment, the use of shielded cables is particularly important; the backplane electrical connector provides a stable and reliable electrical connection, ensuring the smooth data transmission between the transmission storage device and the shielded chassis. At the same time, the design of the backplane electrical connector is also convenient for maintenance and upgrading, which improves the scalability of the system. The transmission storage device can receive the alarm signal processing module in real time, and the alarm information of leakage or water accumulation of important equipment of the ship's power plant and the over-limit alarm of the bilge water level, and store it in the internal memory. In this way, the operator can view the historical data at any time and have a comprehensive understanding and analysis of the operating status of the ship's power plant.

[0024] In combination with the first aspect, in one implementation, the alarm light sign is connected to the output port of the alarm signal processing module of the shielding chassis 1 via a cable, and its green, yellow and red lights are driven by the three-level alarm logic of the alarm signal processing module respectively.

[0025] In this embodiment, a stable connection is established between the alarm light sign and the alarm signal processing module of the shielded chassis 1 through a cable. This connection method ensures the stable transmission of the signal and the accurate display of the alarm information; the green light usually indicates that the system is in a normal state or the alarm has been confirmed and processed, which corresponds to the "normal / processed" alarm logic in the alarm signal processing module. The yellow light often indicates that there is an early warning or minor alarm in the system, prompting the operator to pay attention and take corresponding preventive measures, which corresponds to the "early warning / minor" alarm logic in the alarm signal processing module. The red light directly indicates that a serious fault or major alarm has occurred in the system, and the operator needs to take immediate action to avoid potential danger or loss. This corresponds to the "serious / major" alarm logic in the alarm signal processing module; by dividing the alarm into different levels, the operator can more quickly and accurately identify the current state of the system, so as to make an appropriate response. This hierarchical alarm mechanism helps to improve the overall safety and reliability of the system and reduce the potential risks caused by false alarms or missed alarms.

[0026] In combination with the first aspect, in one embodiment, the operator is connected to the input port of the alarm signal processing module of the shielded chassis through a cable, and its light check button, light extinguishing button, ring extinguishing button and light check switch respectively trigger the detection, light extinguishing, ring extinguishing and loop output check functions of the alarm signal processing module.

[0027] In this embodiment, a stable connection is established between the operator and the alarm signal processing module of the shielded chassis 1 through a cable, ensuring that the operator can accurately and reliably trigger various functions of the alarm signal processing module; the light check button, when this button is pressed, it will trigger the detection function of the alarm signal processing module, and conduct a comprehensive check on the status of the indicator lights in the system to ensure that each indicator light is working normally; the light extinguishing button, after pressing this button, the alarm signal processing module will perform the light extinguishing operation and turn off the currently flashing alarm indicator light to indicate that the relevant alarm has been processed or confirmed; the ringing button, this button is used to trigger Bell silencing function: when the system sounds an alarm bell, pressing the bell silencing button can stop the bell immediately to avoid noise interference; light check switch: this switch is used to start the loop output check function. When it is turned on, the alarm signal processing module will perform a self-check on the circuit of the entire alarm system to ensure that the circuit connection is normal and there is no open circuit or short circuit. The buttons and switches on the operator are connected to the input port of the alarm signal processing module through cables. When the button or switch is operated, a corresponding electrical signal will be sent to the module. After receiving these signals, the alarm signal processing module will perform corresponding functional operations according to the preset logical relationship.

[0028] In combination with the first aspect, in one implementation, the alarm bell is connected to the audio output port of the alarm signal processing module of the shielded chassis 1 via a cable, and the sound is driven by the alarm signal processing module.

[0029] In this embodiment, the alarm bell is connected to the alarm signal processing module of the shielded chassis through a cable, ensuring that the alarm bell can accurately and promptly respond to the output signal of the alarm signal processing module and issue a clear sound alarm. When the alarm signal processing module detects an abnormal situation or receives an alarm signal, it will send a corresponding electrical signal to the audio output port according to a preset logical relationship. After the alarm bell receives these signals, the internal electromagnetic device or mechanical device will be activated to generate sound to alert the operator.

[0030] In combination with the first aspect, in one embodiment, the water level signal conversion module includes: a self-check circuit, a probe input circuit, a rectification and threshold comparison circuit, a conduction and drive circuit, and a relay contact output circuit; the input end of the self-check circuit is selectively connected to a standard resistor to simulate the water level probe signal through a switching switch, and its output end is coupled to a signal detection node of the probe input circuit, and is used to check the normal operation of the alarm system through a standard resistor to simulate the low-resistance conduction state of the probe in the self-check mode; the input end of the probe input circuit is electrically connected to the electrode of the water level signal probe, and its output end is electrically connected to the electrode of the water level signal probe through a rectification and threshold comparison circuit. After the circuit is processed, it is connected to the control end of the conduction and drive circuit. The rectification and threshold comparison circuit is configured to rectify the probe signal and jumper to output the conduction control signal according to a preset threshold (selected by the jumper according to the salt concentration of the measured meson); the control end of the conduction and drive circuit is electrically connected to the output end of the rectification and threshold comparison circuit, and its driving end is electrically connected to the coil of the relay contact output circuit, which is used to drive the relay coil to be energized or de-energized according to the conduction control signal, and its leakage, water accumulation, and high water level alarm signal port are connected to the normally open contact of the relay contact output circuit, and its low water level alarm signal port is connected to its normally closed contact.

[0031] In this embodiment, the self-check circuit is used for self-checking to ensure the normal operation of the system. It is selectively connected to the standard resistor to simulate the water level probe signal through the switching switch, and the resistance change of the simulated probe in different states is simulated. In the self-check mode, the self-check circuit simulates the low-resistance conduction state of the probe through the standard resistor to detect whether the system can respond correctly; the probe input circuit receives the signal from the water level signal probe. When the electrode of the probe contacts the water, the resistance will change due to the conductivity of the water, thereby generating a signal, which is electrically connected to the electrode of the water level signal probe, and converts the resistance change of the probe into a voltage or current signal output; the rectification and threshold comparison circuit rectifies the signal output by the probe input circuit, and converts it according to the preset value. Assume that the threshold jumper outputs a conduction control signal, the rectifier circuit converts the AC signal into a DC signal, and the threshold comparison circuit determines whether the voltage or current of the output signal reaches the condition for triggering an alarm based on a preset threshold. If reached, the conduction control signal is output; the conduction and drive circuit drives the relay coil to be energized or de-energized according to the conduction control signal output by the rectifier and threshold comparison circuit. When the conduction control signal is received, the conduction and drive circuit drives the relay coil to be energized, so that the relay contacts are closed or opened; its leakage, water accumulation, and high water level signal ports are connected to the normally open contacts of the relay, and the normally closed contacts are connected to the low water level alarm signal port. When the relay coil is energized, an alarm signal is output.

[0032] In combination with the first aspect, in one embodiment, Figure 2As shown, the alarm signal processing module includes a microprocessor, an input circuit, an output isolation circuit, a feedback compliance circuit, a de-jitter isolation circuit, a self-recovery circuit and a bus interface; the input end of the input circuit is electrically connected to the output end of the water level signal conversion module, and its output end is connected to the signal acquisition port of the microprocessor in turn through the photoelectric isolation circuit, for receiving external signals and performing electrical isolation; the output end of the microprocessor is connected to the sound output port and the alarm light sign output port through the output isolation circuit, which are used to generate acoustic alarm signals and optical alarm signals respectively; the input end of the feedback compliance circuit is electrically connected to the state feedback end of the alarm light sign, and its output end is fed back to the fault diagnosis port of the microprocessor, which is used to verify the consistency of the input signal and the output signal through the on and off state of the light sign, and detect the line connection fault of the alarm system; the de-jitter isolation circuit is connected between the microprocessor and the operator, and the self-recovery circuit is connected to the microprocessor; the communication end of the bus interface is electrically connected to the data port of the microprocessor, and its interface end is connected to the data transmission module through the bus, which is used to upload the alarm signal and system status data to the external device.

[0033] In this embodiment, the microprocessor serves as the brain of the entire alarm signal processing module. The microprocessor is responsible for receiving, processing and sending signals. It determines whether an alarm needs to be triggered by analyzing the signal received from the input circuit, and controls the audio output port and the alarm light sign output port through the output isolation circuit; the input end of the input circuit is closely connected to the output end of the water level signal conversion module, receives the external signal from the water level signal conversion module, and performs electrical isolation through the photoelectric isolation circuit to protect the microprocessor from external electrical interference; the output isolation circuit is connected to the output end of the microprocessor, and is further connected to the audio output port and the alarm light sign output port. According to the instructions of the microprocessor, the output isolation circuit controls the alarm signals of the audio and light sign to ensure the accurate transmission of the alarm information; the feedback compliance circuit has its input end connected to the status feedback end of the alarm light sign, and the output end is fed back to the microprocessor The fault diagnosis port of the processor verifies the consistency of the input signal and the output signal by monitoring the on and off status of the light sign, thereby detecting whether there is a fault in the line connection of the alarm system; the de-jitter isolation circuit is connected between the microprocessor and the operator. The de-jitter isolation circuit is used to eliminate the jitter signal that may be generated when the operator button or switch is operated, ensuring that the signal received by the microprocessor is stable and reliable. The self-recovery circuit is used to automatically try to restore the normal operating state of the system when the system is abnormal or fails. For example, in the event of power fluctuations or short-term power outages, the self-recovery circuit can ensure that the system quickly resumes normal operation; the bus interface has its communication end connected to the data port of the microprocessor, and the interface end is connected to the data transmission module through the bus. The bus interface is responsible for uploading the alarm signal and system status data to external equipment, such as a monitoring center or a data analysis system, for further monitoring and analysis.

[0034] In a second aspect, an embodiment of the present application provides a method for processing a signal alarm system of a ship power plant as described in some of the above embodiments, which comprises the following steps: S100: receiving a contact signal sent by a water level signal conversion module, wherein the contact signal is converted into a corresponding normally open / normally closed contact logic based on a water level state and a leakage state detected by a water level signal probe; S200: Isolate and filter the input contact signal, and perform signal consistency verification based on multiple consecutive samplings through a microprocessor. When the sampling signal is consistent for N consecutive times, it is determined to be a valid alarm signal; S400: Dynamically control the alarm light sign display mode and alarm bell excitation logic according to the input status of the light check signal, bell elimination signal and light elimination signal; S500: Compare the actual status of the alarm light sign with the input alarm signal in real time. If there is any inconsistency, activate the system fault indicator light and transmit the alarm information and fault status to the external monitoring device through the bus.

[0035] In this embodiment, step S100 involves receiving contact signals from the water level signal conversion module. These contact signals are normally open / normally closed contact logic signals converted based on the water level status and potential leakage status detected by the water level signal probe. The water level signal conversion module processes the signal of the water level probe through an internal circuit and converts it into a contact signal recognizable by the microprocessor; S200 In order to enhance the stability and reliability of the signal, the input contact signal will first be isolated and filtered, which helps to eliminate external interference and ensure the purity of the signal. The isolated and filtered signal is sampled continuously for multiple times by the microprocessor and consistency verification is performed. Only when the sampled signal is consistent for N consecutive times (N is a preset value), it will be determined as a valid alarm signal. This step is intended to reduce the possibility of false alarms; S400 is based on According to the input status of the light check signal, the bell elimination signal and the light extinguishing signal, this step dynamically controls the display mode of the alarm light sign and the excitation logic of the alarm. For example, when a light check signal is received, the alarm light sign may display the alarm information in a specific way (such as flashing); when a bell elimination signal is received, the alarm may stop ringing; when a light extinguishing signal is received, the alarm light sign may go out or return to normal. S500 This step compares the actual status of the alarm light sign with the input alarm signal in real time to ensure that the output of the system is consistent with the input, thereby verifying the correctness of the system. If the comparison result shows inconsistency, the system will activate the system fault indicator light and transmit the alarm information and fault status to the external monitoring device through the bus. This helps to discover and solve problems in a timely manner and ensure the stable operation of the system.

[0036] In conjunction with the second aspect, in one implementation, in S200, the following steps are included: S201: Perform photoelectric isolation and de-jitter processing on the input signal; S202: using fixed period sampling, when 12 consecutive sampling values ​​are the same, it is determined to be a true signal; S203: If the sampling values ​​do not reach consistency, restart the sampling process until a valid signal is obtained.

[0037] In this embodiment, in step S201, the input signal is electrically isolated from the subsequent circuit through an optocoupler or other isolation device, which helps to eliminate external electrical interference, protect the subsequent circuit from damage, and improve the stability and reliability of the system. Since the contact signal may produce a short-term jitter phenomenon when switching, de-jitter processing is necessary. The de-jitter circuit can eliminate this jitter to ensure the stability and accuracy of the input signal; S202 The system uses a fixed time period to sample the input signal. This period is determined based on the response time and accuracy requirements of the system to ensure that the signal changes can be accurately captured. In 12 consecutive During the sampling process of times (or other preset times), if the sampling value remains consistent (that is, the state of the signal has not changed), the signal is determined to be a true signal. The purpose of this step is to reduce the possibility of false alarms and ensure that the alarm logic is triggered only when the signal is indeed stable. If the sampling value fails to achieve consistency in S203 (that is, the sampling values ​​are different for 12 consecutive times), the system considers that the current signal is unstable or there is interference. At this time, the sampling process will be restarted. After restarting the sampling process, the system will continue to sample at a fixed period and perform consistency verification again. This process will be repeated until a stable and consistent signal is obtained.

[0038] In conjunction with the second aspect, in one implementation, in S500, the following steps are included: S501: sorting the alarm information according to the alarm signal processing module to generate a standardized data packet; S502: Transmitting the data packet to the external monitoring device via the bus interface, and synchronously storing the alarm information and the status comparison result; S503: When it is detected that the alarm light sign state conflicts with the input signal logic, the self-recovery mechanism is triggered to force the microprocessor to reset to the initial state.

[0039] In this embodiment, S501 classifies and sorts the received alarm information according to the alarm signal processing module, which helps the external monitoring device to understand the status and alarm status of each module more clearly. According to the sorted alarm information, the system generates standardized data packets, which contain detailed information of the alarm information, such as alarm type, timestamp, module identification, etc., so as to facilitate the external monitoring device to parse and process; S502 The system transmits the generated standardized data packets to the external monitoring device through the bus interface (such as CAN bus, Modbus bus, etc.), which ensures the real-time and accuracy of the alarm information. While transmitting the data packet, the system will also synchronously store the alarm information and the status comparison results in a local or remote storage device, which is helpful for subsequent analysis and troubleshooting; S503 continuously detects whether there is a logical conflict between the actual state of the alarm light sign and the input signal. For example, if the input signal indicates that an alarm should be triggered, but the alarm light sign shows that the alarm is not triggered, or vice versa, it is regarded as a logical conflict. When a logical conflict is detected, the system will trigger a self-recovery mechanism, which includes forcing the microprocessor to reset to the initial state to clear possible error states or interference, and try to re-establish the normal working state of the system.

[0040] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate positions or positions based on the positions or positions shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0041] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0042] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A signal alarm system for a ship power plant, characterized in that: It includes: A water level signal probe, the water level signal probe comprising two independent electrical contact probes, the positive ends of the two electrical contact probes are respectively connected to the input ports of the signal alarm device, which are used to transmit the water level status signal; The signal alarm device comprises a shielded chassis 1 and a shielded chassis 2, wherein the shielded chassis 1 is connected to a transmission storage device, an operator, an alarm light sign and an alarm bell via a backplane electrical connector, and internally integrates a power module, an alarm signal processing module and a data transmission module, wherein the power module provides DC power supply for the alarm signal processing module and the data transmission module, the alarm signal processing module communicates with the data transmission module via a bus, and the data transmission module is connected to the transmission storage device via a serial interface; The shielded chassis 2 is connected to the water level signal probe via a backplane electrical connector, and has an integrated water level signal conversion module and a transformer. The transformer provides AC power to the water level signal probe, and the water level signal conversion module is connected to the input port of the alarm signal processing module.

2. The ship power plant signal alarm system according to claim 1, characterized in that: The transmission storage device is connected to the backplane electrical connector of the shielded chassis 1 via a shielded cable, and is used to receive and store alarm information on leakage or water accumulation of important equipment in the ship's power plant and over-limit alarm information of the bilge water level transmitted by the alarm signal processing module.

3. The ship power plant signal alarm system according to claim 1, characterized in that: The alarm light sign is connected to the output port of the alarm signal processing module of the shielding chassis 1 through a cable, and its green, yellow and red lights are driven by the three-level alarm logic of the alarm signal processing module respectively.

4. The ship power plant signal alarm system according to claim 1, characterized in that: The operator is connected to the alarm signal processing module input port of the shielded chassis 1 through a cable, and its light check button, light extinguishing button, bell extinguishing button and light check switch respectively trigger the detection, light extinguishing, bell extinguishing and loop output inspection functions of the alarm signal processing module.

5. The ship power plant signal alarm system according to claim 1, characterized in that: The alarm bell is connected to the audio output port of the alarm signal processing module of the shielded chassis 1 through a cable, and the sound is driven by the alarm signal processing module.

6. The ship power plant signal alarm system according to claim 1, characterized in that: The water level signal conversion module includes: a self-checking circuit, a probe input circuit, a rectification and threshold comparison circuit, a conduction and driving circuit, and a relay contact output circuit; The input end of the self-check circuit is selectively connected to the standard resistor analog water level probe signal through a switching switch, and the output end is coupled to the signal detection node of the probe input circuit, and is used to simulate the low-resistance conduction state of the probe through the standard resistor in the self-check mode; The input end of the probe input circuit is electrically connected to the electrode of the water level signal probe, and the output end thereof is connected to the control end of the conduction and drive circuit after being processed by the rectification and threshold comparison circuit, and the rectification and threshold comparison circuit is configured to rectify the probe signal and output a conduction control signal according to a preset threshold jumper; The control end of the conduction and driving circuit is electrically connected to the output end of the rectification and threshold comparison circuit, and its driving end is electrically connected to the coil of the relay contact output circuit, and is used to drive the relay coil to be energized or de-energized according to the conduction control signal. Its leakage, water accumulation, and high water level alarm signal ports are connected to the normally open contacts of the relay contact output circuit, and its low water level alarm signal port is connected to its normally closed contacts.

7. The ship power plant signal alarm system according to claim 1, characterized in that: The alarm signal processing module includes a microprocessor, an input circuit, an output isolation circuit, a feedback compliance circuit, a de-jitter isolation circuit, a self-recovery circuit and a bus interface; The input end of the input circuit is electrically connected to the output end of the water level signal conversion module, and the output end thereof is connected to the signal acquisition port of the microprocessor via the photoelectric isolation circuit in turn, for receiving external signals and performing electrical isolation; The output end of the microprocessor is connected to an audio output port and an alarm light sign output port via the output isolation circuit, and is used to generate an acoustic alarm signal and an optical alarm signal respectively; The input end of the feedback coincidence circuit is electrically connected to the state feedback end of the alarm light sign, and the output end thereof is fed back to the fault diagnosis port of the microprocessor, so as to verify the consistency of the input signal and the output signal through the on and off state of the light sign, and detect the line connection fault of the alarm system; The de-jitter isolation circuit is connected between the microprocessor and the operator, and the self-recovery circuit is connected to the microprocessor; The communication end of the bus interface is electrically connected to the data port of the microprocessor, and the interface end is connected to the data transmission module through the bus, so as to upload the alarm signal and system status data to the external device.

8. A processing method for a signal alarm system of a ship power plant according to any one of claims 1 to 7, characterized in that: It includes the following steps: Receive the contact signal sent by the water level signal conversion module, and convert the contact signal into the corresponding normally open / normally closed contact logic based on the water level state and leakage state detected by the water level signal probe; The input contact signal is isolated and filtered, and the signal consistency verification based on continuous multiple sampling is performed by the microprocessor. When the sampling signal is consistent for N consecutive times, it is determined to be a valid alarm signal; Dynamically control the alarm light sign display mode and alarm bell excitation logic according to the input status of the light check signal, bell elimination signal and light elimination signal; The actual status of the alarm light sign is compared with the input alarm signal in real time. If there is any inconsistency, the system fault indicator light is activated, and the alarm information and fault status are transmitted to the external monitoring device through the bus.

9. The processing method of the ship power plant signal alarm system according to claim 8, characterized in that: The input contact signal is isolated and filtered, and the signal consistency verification based on multiple consecutive sampling is performed by a microprocessor. When the sampling signal is consistent for N consecutive times, it is determined to be a valid alarm signal, including: Perform photoelectric isolation and de-jitter processing on the input signal; Adopt fixed period sampling, when the sampling values ​​are the same for 12 times in a row, it is judged as a true signal; If the sampling values ​​do not reach consistency, restart the sampling process until a valid signal is obtained.

10. The processing method of the ship power plant signal alarm system according to claim 8, characterized in that: The actual state of the alarm light sign is compared with the input alarm signal in real time. If there is any inconsistency, the system fault indicator light is activated, and the alarm information and fault state are transmitted to the external monitoring device through the bus, including: Sort the alarm information by alarm signal processing module and generate standardized data packets; Transmit data packets to external monitoring equipment through the bus interface, and synchronously store alarm information and status comparison results; When it is detected that the alarm light sign state conflicts with the input signal logic, the self-recovery mechanism is triggered to force the microprocessor to reset to the initial state.

Images