Crack self-inspection alarm protection system for large cushion block of cubic press

Abstract

The utility model discloses a crack self-inspection alarm protection system for a large cushion block of a cubic press, which relates to the technical field of artificial diamonds and comprises a signal acquisition module, an analog-to-digital conversion module, an industrial personal computer, an alarm device, a relay module and an actuating mechanism. The six tension sensors are used for monitoring tension changes of the root of the large cushion block in real time, instant detection of cracks is achieved, when abnormal conditions such as the cracks are detected, the system rapidly triggers the alarm device and the executing mechanism, equipment stops heating and releases pressure in time, blasting and wounding accidents caused by explosion of the large cushion block are avoided, and the safety of the large cushion block is guaranteed. Through continuous monitoring and data analysis, the system reduces the manual inspection cost, predicts the service life of equipment and potential fault points, and provides support for equipment maintenance and management. The alarm device and the relay module cooperate with each other, so that the reliability of the system and the self-protection capability of the equipment are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to synthetic diamond technology field, and more exactly relates to a six -sided top press big cushion block crack self -checking alarm protection system. BACKGROUND

[0002] With the rapid development of science and technology, six -sided top press has been widely used in the field of superhard material synthesis. In order to guarantee the production safety, improve product quality, big cushion block crack self -checking alarm protection system becomes the research hotspot. In recent years, the fusion of intelligent sensing technology and big data analysis provides new opportunities and challenges for the development of the system.

[0003] Six -sided top press is the key equipment for synthesizing diamond and other superhard materials under high temperature and high pressure environment. As a pressure-bearing component, the state of big cushion block is directly related to the safe operation of equipment. Although the mainstream synthetic diamond electric control system has included a number of protection systems, there is still no any self -checking alarm protection system for big cushion block crack. Many parts of big cushion block are out of the visible range, and it is difficult to find the crack of big cushion block in time. The big cushion block with crack is extremely dangerous under the working condition of tens of megapascal superhigh pressure for a long time, and it is easy to produce big cushion block burst, explosion and other serious economic losses and major accidents. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a six -sided top press big cushion block crack self -checking alarm protection system, which solves the problems in the background art.

[0005] In order to realize the above technical effects, the utility model adopts the following technical scheme:

[0006] A six -sided top press big cushion block crack self -checking alarm protection system, comprising:

[0007] Signal acquisition module is used for real -time monitoring the rise force change of big cushion block root by six rise force sensors;

[0008] Analog-digital conversion module is used for converting the analog signal from sensor into digital signal

[0009] Industrial computer is used for processing the digital signal from analog-digital conversion module, carrying out data analysis and executing protection measures;

[0010] Alarm device is used for sending sound and light alarm signal when detecting abnormal condition;

[0011] Relay module is used for controlling the emergency stop of press;

[0012] Actuator is used for receiving the control instruction of relay module, executing stop heat, pressure relief protection operation;

[0013] The output end of each sensor is connected to the input end of the analog-digital conversion module through a shielded cable; the output end of the analog-digital conversion module is connected to the input port of the industrial computer through a USB interface or an RS485 serial communication interface; the output end of the industrial computer is connected to the input end of the alarm device and the relay module through a digital I / O port; the output end of the relay module is connected to the input end of the actuator.

[0014] As a further description of the above technical solution: the signal acquisition module includes a left cylinder ring type tension sensor, a right cylinder ring type tension sensor, a front cylinder ring type tension sensor, a rear cylinder ring type tension sensor, an upper cylinder ring type tension sensor, and a lower cylinder ring type tension sensor, which are uniformly distributed and installed at the root positions of the six large pads of the six-sided press.

[0015] As a further description of the above technical solution: the tension sensor is composed of a strain gauge, a resistance network, a signal conditioning circuit, a shell, and a connecting line; the strain gauge is connected with the resistance network to form a Wheatstone bridge, which outputs an analog voltage signal; the signal conditioning circuit performs preliminary amplification and compensation on the output of the Wheatstone bridge; the connecting line transmits the amplified signal to the outside.

[0016] As a further description of the above technical solution: the shielded cable uses a twisted pair as the signal transmission medium.

[0017] As a further description of the above technical solution: the industrial computer includes a data receiving unit, a data processing unit, a reference value management unit, an abnormality detection unit, an alarm control unit, an actuator control unit, and a log recording unit; the output end of the data receiving unit is connected to the input end of the data processing unit; the output end of the data processing unit is connected to the input end of the reference value management unit; the output end of the reference value management unit is connected to the input end of the abnormality detection unit; the output end of the abnormality value detection unit is connected to the alarm control unit, the actuator unit, and the input end of the log recording unit.

[0018] As a further description of the above technical solution: the alarm device includes a buzzer, an indicator light, an alarm relay, a power supply circuit, and an input-output interface; the input end of the buzzer and the indicator light is connected to the normally open contact of the alarm relay; the coil end of the alarm relay is connected to the output port of the industrial computer; the power supply circuit provides DC power for the entire device.

[0019] As a further description of the above technical solutions: the actuator includes a solenoid valve / motor, a controller, a power supply circuit, an input / output interface; the control end of the solenoid valve / motor is connected to the output end of the controller; the input end of the controller receives the control signal of the industrial computer; the power supply circuit provides direct current or alternating current power supply for the whole mechanism; the input / output interface includes a sensor interface and an actuator interface.

[0020] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present application are:

[0021] 1、The present application can realize real-time detection of cracks by adopting six tension sensors to monitor the tension change of the root of the large pad, and when the system detects abnormal conditions such as cracks, it can quickly trigger the alarm device and the actuator to realize emergency shutdown and protection operation, thereby effectively avoiding equipment damage and accidents.

[0022] 2、The present application can continuously monitor and analyze the tension change of the large pad through real-time monitoring and data analysis of the six tension sensors, so as to timely discover potential crack problems. This continuous self-checking state not only improves the safety of the equipment, but also reduces the frequency and cost of manual inspection. At the same time, the system can also predict the life and potential failure points of the equipment according to historical data and trend analysis, providing strong support for the maintenance and management of the equipment.

[0023] 3、The present application can trigger the computer protection program immediately and control the actuator to perform protection operations such as shutdown and pressure relief when detecting abnormal conditions such as cracks through the synergistic effect of the alarm device and the relay module. This synergistic effect not only enhances the reliability of the system, but also improves the self-protection ability of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings, wherein:

[0025] Figure 1 is the overall architecture diagram of the present application;

[0026] Figure 2 is the working principle diagram of the present application

[0027] Figure 3 is the circuit principle diagram of the tension sensor of the present application;

[0028] Figure 4 The utility model discloses a circuit principle schematic diagram of industrial computer.

[0029] Figure 5 The utility model discloses a circuit working principle diagram of relay module.

[0030] Marked number in drawing: 1, signal acquisition module;2, AD conversion module;3, industrial computer;4, alarm device;5, relay module;6, actuator. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to 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 the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0032] As shown in Figures 1-5 A six-surface press big cushion block crack self-checking alarm protection system, comprising:

[0033] Signal acquisition module 1 is used for real-time monitoring the expansion force change of the big cushion block root by six expansion force sensors;In a specific embodiment of a six-surface press big cushion block crack self-checking alarm protection system, the circuit principle of signal acquisition module 1 is based on the combination of LM339 comparator chip and Wheatstone bridge. Inside each expansion force sensor, the strain gauge and the precision resistance network constitute a Wheatstone bridge, when the big cushion block root is subjected to pressure change, the strain gauge resistance value changes accordingly, resulting in a bridge output an analog voltage signal proportional to the pressure change. This weak voltage signal is then sent to the input end of LM339 comparator, before that, the signal first passes through the signal conditioning circuit, which contains a preliminary amplifier and a compensation circuit, for enhancing signal strength and adjusting offset, to ensure that the signal can be accurately identified by LM339. LM339 comparator is provided with two reference voltage thresholds, corresponding to the normal expansion force range and the abnormal expansion force (may indicate the emergence of crack) threshold respectively, when the input signal exceeds any threshold, the comparator outputs the corresponding logic level, triggering the alarm mechanism.

[0034] When the system is working, six tension sensors (one for each of the left cylinder, right cylinder, front cylinder, rear cylinder, upper cylinder, and lower cylinder) continuously monitor the tension state of the root of the large pad. The output signal of each sensor's Wheatstone bridge is conditioned, and then compared by the LM339 comparator with double thresholds. If the tension fluctuates within the normal range, the LM339 outputs a low level; once the tension is abnormal and exceeds the preset safety range, the LM339 immediately outputs a high level, which is transmitted to the central processing unit (CPU) through the connecting line. The CPU identifies the signal and starts the alarm program, and may trigger the emergency shutdown mechanism to protect the six-sided press and the operator. Throughout the process, the LM339 ensures the stability and response speed of the system with its high precision and low power consumption characteristics.

[0035] In the system, the tension sensor uses a custom model that integrates an LM339 comparator to ensure high circuit integration and strong reliability. The LM339 comparator has low power consumption (maximum operating current of only 2 mA), high precision (maximum input offset voltage of 5 mV), and high-speed response (propagation delay time less than 1.5 μs). The strain gauge uses a high-precision foil resistance strain gauge with a sensitivity coefficient K = 2.0 ± 1% and a resistance value of 350 Ω to adapt to the complex stress distribution at the root of the large pad. The amplifier gain in the signal conditioning circuit is set to 100 times to amplify the weak millivolt-level signal to the volt-level signal that is easy to process. The compensation circuit is fine-tuned according to the actual application environment to ensure the accuracy of the output signal.

[0036] In implementation, the installation position of the tension sensor is crucial and needs to accurately correspond to the root of the six large pads of the six-sided press. The specific installation steps are as follows: first, clean and remove oil stains from the surface of the root of the large pad to ensure that the installation surface is smooth and flat; then, mark the installation hole position on the large pad according to the size of the sensor, and drill the installation hole using a special tool; then, fix the sensor to the marked position through threaded connection or adhesive, ensuring that the force direction of the sensor is consistent with the tension direction; finally, connect the signal line of the sensor to the signal acquisition board, pay attention to the shielding and protection of the signal line to avoid external interference. After installation is completed, perform a function test to verify whether each sensor can accurately reflect the change in tension, and adjust the reference voltage of the LM339 comparator to ensure that the alarm threshold is set reasonably, thereby achieving effective self-checking and alarm protection of the cracks in the large pad.

[0037] Analog-to-digital conversion module 2, for converting analog signals from sensors into digital signals; in specific embodiments, the circuit principle of the analog-to-digital conversion module 2 (ADC) is based on a high-precision analog-to-digital converter chip, such as the commonly used ADS127L01. This chip can convert the analog voltage signal from the sensor into a high-precision digital signal. In terms of circuit design, the output end of each sensor is connected to the input channel of the ADC, and the switching of the six channels is realized through a multiplexer (MUX) to sequentially read the data of each sensor. The ADC contains an analog front end (AFE) inside, which is responsible for signal amplification, filtering and sampling, ensuring the accuracy of the signal. The converted digital signal is transmitted to the digital processing unit (DPU) through the internal bus structure, and the DPU further processes and analyzes the digital signal, which is finally used for crack self-detection and alarm judgment.

[0038] The working mode of the analog-to-digital conversion module 2 mainly includes three steps of signal acquisition, conversion and transmission. First, in the signal acquisition stage, the multiplexer selects the analog signal of each sensor in turn according to the preset order and inputs it to the analog front end of the ADC. Then, in the conversion stage, the ADC amplifies, filters and samples the received analog signal, and converts it into a high-precision digital signal through the quantization process. Finally, in the transmission stage, the converted digital signal is transmitted to the digital processing unit through the internal bus, and the DPU performs subsequent processing. The DPU analyzes and judges the digital signal according to the preset algorithm and threshold, and if an abnormal signal (such as exceeding the preset tension threshold) is detected, the alarm mechanism is triggered, and the alarm signal is output to the control unit, realizing the functions of crack self-detection and alarm protection.

[0039] In this embodiment, the analog-to-digital conversion module 2 uses an ADS127L01 type analog-to-digital converter chip. This chip has a high resolution of 24 bits, which can accurately capture the small changes in the analog signal. Its sampling rate can reach 256kSPS (thousands of samples per second), meeting the needs of real-time monitoring. In addition, ADS127L01 also has the advantages of low power consumption, high precision, strong anti-interference ability, etc., and is suitable for signal acquisition and processing in industrial environments. In terms of parameters, the input voltage range of the chip is ±10V, which can cover the analog signal range output by the sensor. At the same time, the chip integrates a programmable gain amplifier (PGA) inside, which can adjust the amplification factor according to the needs, to adapt to the output signal strength of different sensors.

[0040] The industrial computer 3 is used for processing digital signals from the analog-digital conversion module 2, conducting data analysis, and executing protection measures; the industrial computer 3 comprises a data receiving unit, a data processing unit, a reference value management unit, an abnormality detection unit, an alarm control unit, an actuator control unit, and a log recording unit; the output end of the data receiving unit is connected with the input end of the data processing unit; the output end of the data processing unit is connected with the input end of the reference value management unit; the output end of the reference value management unit is connected with the input end of the abnormality detection unit; the output end of the abnormality detection unit is connected with the alarm control unit, the actuator control unit, and the input end of the log recording unit. In the specific implementation, the industrial computer 3 receives digital signals from the analog-digital conversion module 2 through the data receiving unit (usually realized by a serial communication interface or an Ethernet interface). After the preliminary processing of the data processing unit (including CPU, memory, storage device, etc.), the signals are sent to the reference value management unit for comparison and analysis. The reference value management unit stores a preset normal working parameter range, which is used to evaluate whether the current working state is normal. The abnormality detection unit judges whether there is an abnormal signal according to the comparison result, and once an abnormality is detected, the alarm control unit and the actuator control unit are triggered immediately, and at the same time, the log recording unit records the whole process and key data of the event. The whole system adopts a modular design, and the units are connected through an internal bus or a special interface for high-speed data transmission, ensuring that the system responds quickly and is stable and reliable. The industrial computer 3 adopts 87LPC764 single-chip microcomputer, which is a 20-pin single-chip microcomputer produced by NXP Semiconductor Company, and has 4KB of one-time programmable memory (OTP). This microcontroller is designed for applications that require high integration, low-cost solutions, and fewer pins. It is based on the accelerated 80C51 processor architecture, can execute instructions at a frequency of up to 20MHz, when the power supply voltage is between 4.5V and 6.0V, and runs at a frequency of 10MHz between 2.7V and 6.0V. 87LPC764 has multiple functions, including programmable oscillator configuration, wide operating voltage range, programmable port output configuration, optional Schmitt trigger input, LED drive output, and built-in watchdog timer, etc. In addition, it also contains two 16-bit counters / timers, two analog comparators, full-duplex UART, I2C communication port, keyboard interrupt input, and multiple interrupt priority characteristics;

[0041] The alarm device 4 is used to issue sound and light alarm signals when an abnormal situation is detected. In a specific embodiment, the alarm device 4 mainly consists of a buzzer, an indicator light, an alarm relay, a power supply circuit, and an input-output interface. The core of the circuit is the control function of the alarm relay, the coil end of which is directly connected to the output port of the industrial computer 3 as a control signal input. When the industrial computer 3 detects an abnormal situation, such as a large pad crack signal exceeding the preset threshold, it will send a high-level signal to the coil end of the alarm relay through the output port, causing the relay to be attracted, and the normally open contact to close. At this time, the input ends of the buzzer and the indicator light are connected to the power supply circuit through the closed normally open contact, thereby activating the buzzer to issue a sound alarm, and the indicator light to emit a visual alarm signal. The power supply circuit is responsible for providing stable DC power for the entire alarm device 4, ensuring the normal operation of each component. The entire circuit design fully considers safety and reliability, and can operate stably even in harsh industrial environments.

[0042] The working mode of the alarm device 4 in the large pad crack self-checking alarm protection system of the six-surface press is as follows: First, the alarm device 4 is in standby state, the buzzer and the indicator light are not working, and the power supply circuit provides standby power for the entire device. When the industrial computer 3 detects an abnormal situation through data analysis, such as an abnormal large pad crack signal, it will immediately send a control signal to the coil end of the alarm relay. This signal causes the relay to be attracted, and the normally open contact to close, thereby connecting the input ends of the buzzer and the indicator light to the power supply circuit. At this time, the buzzer begins to issue a continuous or intermittent sound alarm signal, and the indicator light is lit, emitting a prominent visual alarm signal. The alarm signal will continue until the abnormal situation is resolved or the industrial computer 3 receives a manual reset signal. At the same time, the alarm device 4 can also be connected to the remote monitoring center through the input-output interface. In this specific embodiment, the alarm device 4 uses the following models and parameters:

[0043] Buzzer: YMX-S05B model, working voltage DC 12V, sound loudness ≥85dB, can clearly issue alarm sound in noisy industrial environment.

[0044] Indicator light: LED indicator light, 5mm super-brightness red LED, working voltage DC 5V, high brightness, long life, can clearly indicate the alarm state.

[0045] Alarm relay: Omron G2R-2-DC12 model, coil voltage DC 12V, contact capacity 5A / 250VAC or 5A / 30VDC, with reliable electrical performance and mechanical life.

[0046] Power supply circuit: a dual DC power supply circuit composed of LM7812 and LM7805 voltage stabilizing chips, respectively outputs DC12V and DC5V, provides stable power supply for components such as buzzer, indicator light and relay.

[0047] Input and output interface: RS-485 communication interface is adopted, supporting Modbus RTU protocol, which can realize reliable data communication with remote monitoring center.

[0048] Relay module 5 for controlling the emergency stop of the press; the circuit principle of relay module 5 is based on a simple control circuit and the separation design of controlled circuit. Relay module 5 contains a control circuit and a relay. The control circuit is usually triggered by a low-level or high-level signal, depending on the type of selected transistor (PNP or NPN). When the control input (IN) receives an appropriate signal, the transistor is turned on, making the magnet in the relay energized, which in turn attracts or releases the internal armature, changing the state of the normally open (NO) and normally closed (NC) contacts. In the six-surface press system, the normally closed contact of relay module 5 is usually connected to the emergency stop circuit of the press. When a crack or other fault is detected, the control circuit is activated, the relay acts, and the press power is disconnected, achieving emergency stop.

[0049] The working mode of relay module 5 involves three stages of signal input, processing and output. In the input stage, the detection system (such as crack sensor) transmits the signal to the control circuit. In the processing stage, the control circuit processes the input signal, and if the signal meets the preset alarm condition (such as crack detection signal exceeding threshold value), a trigger signal is generated. In the output stage, this trigger signal causes the relay to act, making the normally closed contact open, and then cutting off the power supply of the press. The whole process is usually very fast and can be completed within a few milliseconds, ensuring that the machine can be stopped quickly in emergency to prevent further damage.

[0050] In the six-surface press large pad crack self-check alarm protection system, LBC184 relay is selected, which can withstand high voltage and high temperature environment to ensure stability and durability during press operation.

[0051] The actuator 6 receives the control instructions of the relay module 5, and performs the heat stopping and pressure relief protection operation; in the six-surface press large pad crack self-checking alarm protection system, the core circuit of the actuator 6 is composed of solenoid valve / motor, controller, power circuit and input / output interface. The circuit principle is based on the controller receiving the control signal from the industrial computer 3, after internal logic processing, outputting the corresponding control instruction to the control end of the solenoid valve / motor, realizing the protection operation such as heat stopping and pressure relief. The power circuit is responsible for providing stable and reliable DC or AC power for the whole actuator 6, ensuring the normal work of each component. The input / output interface includes sensor interface and actuator interface, which is used to connect external sensors (such as temperature sensor, pressure sensor) and actuators (such as solenoid valve, motor), realize the input and output of signals.

[0052] The working mode of the actuator 6 follows the three steps of instruction receiving, processing and execution. First, the industrial computer 3 sends a control signal to the input end of the controller according to the detection result of the crack self-checking system. After receiving the signal, the internal logic circuit of the controller analyzes and judges, determines whether to execute the protection operation such as heat stopping and pressure relief according to the preset program logic. Once it is determined to execute, the controller sends a control instruction to the control end of the solenoid valve / motor through the output end. After receiving the instruction, the solenoid valve / motor acts immediately, closes the heat source and releases the pressure, realizes the protection purpose. During the whole process, the sensor interface continuously monitors the working state of the press, and feeds back the data to the industrial computer 3 for real-time adjustment and optimization.

[0053] In specific implementation, the solenoid valve / motor should be installed in the position of the press which is easy to operate, maintain and close to the protected components, such as the inlet and outlet of the heat source, the discharge port of the pressure vessel, etc. The controller should be installed inside or near the control panel of the press, which is convenient for connection and debugging with the industrial computer 3. The power circuit should be installed in a safe and well-ventilated position to avoid overheating and short circuit.

[0054] The signal acquisition module 1 connects the output end of each sensor to the input end of the analog-digital conversion module 2 through a shielded cable; the output end of the analog-digital conversion module 2 is connected to the input port of the industrial computer 3 through a USB interface or a RS485 serial communication interface; the output end of the industrial computer 3 is connected to the input end of the alarm device 4 and the relay module 5 through a digital I / O port; the output end of the relay module 5 is connected to the input end of the actuator 6. The shielded cable uses twisted pair as the signal transmission medium.

[0055] In specific implementation, the working mode of the six-surface press large pad crack self-checking alarm protection system is divided into initialization stage, real-time monitoring stage and abnormal processing stage. The specific working mode is as follows:

[0056] Initialization phase: Signal acquisition module 1 reads initial data from the six tension sensors, which reflect the normal tension value of the large pad root under the condition of no crack. The industrial computer 3 receives the initial data through the analog-to-digital conversion module 2, filters and normalizes the data, and generates a reference value. The reference value is stored in the reference value management unit for subsequent comparative analysis.

[0057] Real-time monitoring phase: Signal acquisition module 1 continuously reads real-time data from the six tension sensors, which reflect the real-time tension changes of the large pad root. The industrial computer 3 receives the real-time data through the analog-to-digital conversion module 2, filters and normalizes the data to ensure the accuracy and consistency of the data. The industrial computer 3 compares the real-time data with the reference value and calculates the deviation value. If the deviation value exceeds the preset threshold, the system will determine that there is a crack or other abnormal situation.

[0058] Abnormal processing phase: When the industrial computer 3 detects an abnormality, it controls the alarm device 4 to issue a sound or light signal through the digital I / O port, reminding the operator. At the same time, the industrial computer 3 sends instructions to the relay module 5 through the digital I / O port to cut off the power source of the press and perform emergency shutdown operation. The relay module 5 controls the actuator 6 to perform specific protection measures such as shutting down the heating system and releasing pressure. At the same time, the industrial computer 3 records the abnormal information to the log file for later analysis and fault diagnosis.

[0059] Although the specific embodiments of the present application are described above, those skilled in the art should understand that these specific embodiments are only illustrative, and those skilled in the art can make various omissions, substitutions and changes to the details of the above method and system without departing from the principles and essence of the present application. For example, combining the above method steps, performing substantially the same function to achieve substantially the same result according to the substantially same method belongs to the scope of the present application. Therefore, the scope of the present application is only limited by the appended claims.

Claims

1. A six-sided top press large pad crack self-check alarm protection system, comprising: a signal acquisition module for real-time monitoring of the large pad root tension change using six tension sensors; an analog-to-digital conversion module for converting analog signals from the sensors into digital signals an industrial computer for processing digital signals from the analog-to-digital conversion module, conducting data analysis, and executing protection measures; an alarm device for issuing an audible and visual alarm signal when an abnormal condition is detected; a relay module for controlling the emergency stop of the press; an actuator for receiving control instructions from the relay module and executing the stop heat and pressure relief operation; the signal acquisition module connects the output of each sensor to the input of the analog-to-digital conversion module through a shielded cable; the output of the analog-to-digital conversion module is connected to the input port of the industrial computer through a USB interface or RS485 serial communication interface; the output of the industrial computer is connected to the input of the alarm device and the relay module through digital I / O ports; the output of the relay module is connected to the input of the actuator.

2. A cubic press large pad crack self-check alarm protection system according to claim 1, characterized in that: The signal acquisition module includes left cylinder ring tension sensors, right cylinder ring tension sensors, front cylinder ring tension sensors, rear cylinder ring tension sensors, upper cylinder ring tension sensors, and lower cylinder ring tension sensors, which are evenly distributed and installed at the root positions of the six large pads of the six-sided top press.

3. A cubic press large pad crack self-check alarm protection system according to claim 2, characterized in that: The tension sensor is composed of a strain gauge, a resistance network, a signal conditioning circuit, a housing, and a connecting line; the strain gauge is connected with the resistance network to form a Wheatstone bridge, which outputs an analog voltage signal; the signal conditioning circuit performs preliminary amplification and compensation on the output of the Wheatstone bridge; the connecting line transmits the amplified signal to the outside.

4. A cubic press large pad crack self-check alarm protection system according to claim 1, characterized in that: The shielded cable uses twisted pair as the signal transmission medium.

5. A cubic press large pad crack self-check alarm protection system according to claim 1, characterized in that: The industrial computer includes a data receiving unit, a data processing unit, a reference value management unit, an abnormality detection unit, an alarm control unit, an actuator control unit, and a log recording unit; the output of the data receiving unit is connected to the input of the data processing unit; the output of the data processing unit is connected to the input of the reference value management unit; the output of the reference value management unit is connected to the input of the abnormality detection unit; the output of the abnormality detection unit is connected to the alarm control unit, the actuator unit, and the input of the log recording unit.

6. A cubic press large pad crack self-check alarm protection system according to claim 1, characterized in that: The alarm device includes a buzzer, an indicator light, an alarm relay, a power supply circuit, and an input-output interface; the input of the buzzer and the indicator light is connected to the normally open contact of the alarm relay; the coil end of the alarm relay is connected to the output port of the industrial computer; the power supply circuit provides DC power for the entire device.

7. A cubic press large pad crack self-check alarm protection system according to claim 1, characterized in that: The execution mechanism includes electromagnetic valve / motor, controller, power supply circuit, input and output interface; the control end of the electromagnetic valve / motor is connected to the output end of the controller; the input end of the controller receives the control signal of the industrial computer; the power supply circuit provides direct current or alternating current power supply for the whole mechanism; the input and output interface includes sensor interface and actuator interface.

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