High-precision and fast-response ultrahigh pressure adjusting method based on real-time feedback control principle

Abstract

The invention relates to a high-precision and fast-response ultrahigh pressure adjusting method based on a real-time feedback control principle, and belongs to the technical field of ceramic manufacturing. The high-precision and fast-response ultrahigh pressure adjusting method based on the real-time feedback control principle comprises the steps that after a pressure adjusting device is started, a target pressure value is set; a high-precision pressure sensor is used for monitoring the pressure value in the forming process in real time; acquiring data of the pressure sensor in real time through a data acquisition system, and performing filtering and correction processing; the controller calculates the deviation between the current pressure and the set pressure according to the set pressure value and the pressure value collected in real time; by means of the real-time feedback control technology, high-precision adjustment of pressure is achieved, it is ensured that ceramic powder is subjected to uniform pressure in all directions, particles are tightly arranged, the forming density is improved, meanwhile, due to the fact that the pressure is applied in the same direction, the powder particles are subjected to the same compression force in all directions, and it is ensured that ceramic blanks are uniform in density and regular in shape.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic manufacturing, and in particular to a high-precision, fast-response ultra-high pressure regulation method based on a real-time feedback control principle. Background Art

[0002] In the process of preparing ceramic green bodies, cold isostatic pressing (CIP) technology is a commonly used molding method, which applies uniform pressure to the powder through high-pressure liquid or gas medium to improve the molding density and uniformity. However, traditional pressure regulation methods mostly rely on manual adjustment or simple open-loop control, which has problems such as low control accuracy, slow response, and poor stability. These problems may lead to uneven density and irregular shape of the ceramic green body, affecting the performance of the final product.

[0003] Therefore, it is of great significance to develop an ultra-high voltage regulation method that can achieve high precision, fast response and stable control. Summary of the invention

[0004] The present invention aims to provide a high-precision and fast-response ultra-high pressure regulation method based on the principle of real-time feedback control and its influence on density and uniformity in the preparation of ceramic green bodies. By introducing real-time feedback control technology, precise regulation of pressure is achieved to improve the density and uniformity of the ceramic green bodies.

[0005] The high-precision and fast-response ultra-high pressure regulation method based on the real-time feedback control principle comprises the following steps:

[0006] S1: After starting the pressure regulating device, set the target pressure value;

[0007] S2: Use high-precision pressure sensors to monitor the pressure value during the molding process in real time;

[0008] S3: The data of the pressure sensor is collected in real time through the data acquisition system, and filtering and correction processing are performed;

[0009] S4: The controller calculates the deviation between the current pressure and the set pressure according to the set pressure value and the real-time collected pressure value;

[0010] S5: The controller outputs a control signal to the actuator according to the deviation value;

[0011] S6: The actuator adjusts the air or oil intake of the cylinder or hydraulic cylinder according to the instructions of the controller to achieve precise pressure control;

[0012] S7: The display unit displays the current pressure value and the set pressure value in real time, and the alarm device sounds an alarm when the pressure exceeds the set range;

[0013] S8: Molding is completed, the pressure reaches the set value and remains stable.

[0014] In one embodiment, the principle of the controller includes an input signal, a processing unit, an output signal and a feedback unit in sequence;

[0015] Wherein, the input signal is a pressure sensor, a signal from an external environment or system, such as data detected by a sensor;

[0016] In one embodiment, the processing unit includes a pressure regulating valve, a PID controller and an ultra-high pressure pump, which is responsible for processing input signals and calculating corresponding control instructions according to preset rules or algorithms;

[0017] In one embodiment, the output signal is a pressure transmitter indication for display and storage, and the control instruction generated by the processing unit is used to drive the actuator to work;

[0018] In one embodiment, the feedback unit includes a pressure regulating device, a human-machine interaction interface and an alarm device, which monitors the actual response of the system and feeds back the information to the processing unit to adjust the control strategy and achieve more precise control.

[0019] In one embodiment, the pressure regulating device includes a pressure source, a pressure regulating valve, a pressure sensor, a control system, an actuator, a safety valve, a pressure gauge, a pressure gauge and a pipeline, wherein the pressure source is a compressor.

[0020] In one embodiment, the controller adopts a PID control algorithm.

[0021] In one embodiment, the actuator is a solenoid valve or a proportional valve.

[0022] In one embodiment, the human-computer interaction interface includes a display and an indicator light.

[0023] In one embodiment, the alarm device includes a buzzer and a warning light.

[0024] Through real-time feedback control technology, high-precision pressure regulation is achieved to ensure that the ceramic powder is subjected to uniform pressure in all directions, the particles are closely arranged, and the molding density is improved. At the same time, because the pressure is applied in an isotropic manner, the powder particles are subjected to the same compression force in all directions, avoiding the problem of local density unevenness and ensuring that the density of the ceramic body is uniform and the shape is regular;

[0025] High-precision pressure control can reduce the occurrence of defects such as cracks and pores, improve the integrity and quality of the ceramic body, make the molding process more efficient, reduce the defective rate, and improve production efficiency. By precisely controlling pressure and time, the microstructure of the ceramic material can be optimized and its mechanical properties and functionality can be improved. When the pressure exceeds the set range, the alarm device will sound an alarm in time to avoid safety accidents caused by abnormal pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a schematic flow chart of the steps of the high-precision and fast-response ultra-high pressure regulation method based on the real-time feedback control principle of the present invention;

[0028] Figure 2 It is a schematic diagram of the pressure regulating device of the present invention;

[0029] Figure 3 It is a schematic diagram of the controller principle of the present invention;

[0030] Figure 4 It is a system flow chart of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present invention are for illustrative purposes only and do not represent the only implementation method.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] Unless otherwise defined, all technical and scientific terms used in the specification of the present invention have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the specification of the present invention includes any and all combinations of one or more related listed items.

[0036] Combine the following Figure 1-Figure 4 The invention describes a high-precision, fast-response ultra-high pressure regulation method based on the real-time feedback control principle.

[0037] In one embodiment, a high-precision and fast-response ultra-high pressure regulation method based on the real-time feedback control principle comprises the following steps:

[0038] S1: After starting the pressure regulating device, set the target pressure value;

[0039] S2: Use high-precision pressure sensors to monitor the pressure value during the molding process in real time;

[0040] S3: The data of the pressure sensor is collected in real time through the data acquisition system, and filtering and correction processing are performed;

[0041] S4: The controller calculates the deviation between the current pressure and the set pressure according to the set pressure value and the real-time collected pressure value;

[0042] S5: The controller outputs a control signal to the actuator according to the deviation value;

[0043] S6: The actuator adjusts the air or oil intake of the cylinder or hydraulic cylinder according to the instructions of the controller to achieve precise pressure control;

[0044] S7: The display unit displays the current pressure value and the set pressure value in real time, and the alarm device sounds an alarm when the pressure exceeds the set range;

[0045] S8: Molding is completed, the pressure reaches the set value and remains stable.

[0046] It should be noted that pressure sensor monitoring: a high-precision pressure sensor is installed inside the pressure vessel of the cold isostatic pressing device to monitor the pressure value during the molding process in real time and transmit the signal to the controller; after the controller receives the signal from the pressure sensor, it calculates the deviation between the current pressure and the set pressure.

[0047] like Figure 1 , Figure 3 and Figure 4 As shown, the principle of the controller includes input signal, processing unit, output signal and feedback unit in sequence;

[0048] Wherein, the input signal is a pressure sensor, a signal from an external environment or system, such as data detected by a sensor;

[0049] The processing unit includes a pressure regulating valve, a PID controller and an ultra-high pressure pump, which are responsible for processing input signals and calculating corresponding control instructions according to preset rules or algorithms;

[0050] The output signal is the indication of the pressure transmitter for display and storage, and the control instruction generated by the processing unit is used to drive the actuator to work;

[0051] The feedback unit includes a pressure regulating device, a human-machine interaction interface and an alarm device, which monitors the actual response of the system and feeds back the information to the processing unit to adjust the control strategy and achieve more accurate control.

[0052] The controller adopts PID control algorithm to output control signal to the actuator according to the deviation value. PID control algorithm realizes accurate control of pressure through the combination of proportional, integral and differential terms.

[0053] The actuator is a solenoid valve or a proportional valve.

[0054] The human-computer interaction interface includes a display and an indicator light.

[0055] The alarm device includes a buzzer and a warning light. The display unit displays the current pressure value and the set pressure value in real time. The alarm device sends out an alarm when the pressure exceeds the set range.

[0056] like Figure 1 and Figure 2 As shown, the pressure regulating device includes a pressure source, a pressure regulating valve, a pressure sensor, a control system, an actuator, a safety valve, a pressure gauge, a pressure gauge and a pipeline, wherein the pressure source is a compressor.

[0057] In this embodiment, the operation process of the device is a pressure source, a pressure regulating valve, a pressure sensor, a control system, an actuator, a safety valve, a pressure gauge, a pressure gauge and a pipeline, as shown in the attached Figure 2 As shown by the arrow, precise feedback control of pressure is achieved.

[0058] It should be noted that the PID control algorithm and human-computer interaction interface in the above description are all devices with relatively mature application of existing technologies. The specific models can be selected according to actual needs. They are all common technical means in this field. At the same time, the PID control algorithm and the human-computer interaction interface can be powered by a built-in power supply or by AC power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0059] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A high-precision and fast-response ultra-high pressure regulation method based on the real-time feedback control principle, characterized in that: The following steps are involved: S1: After starting the pressure regulating device, set the target pressure value; S2: Use high-precision pressure sensors to monitor the pressure value during the molding process in real time; S3: The data of the pressure sensor is collected in real time through the data acquisition system, and filtering and correction processing are performed; S4: The controller calculates the deviation between the current pressure and the set pressure according to the set pressure value and the real-time collected pressure value; S5: The controller outputs a control signal to the actuator according to the deviation value; S6: The actuator adjusts the air or oil intake of the cylinder or hydraulic cylinder according to the instructions of the controller to achieve precise pressure control; S7: The display unit displays the current pressure value and the set pressure value in real time, and the alarm device sounds an alarm when the pressure exceeds the set range; S8: Molding is completed, the pressure reaches the set value and remains stable.

2. The high-precision and fast-response ultra-high pressure regulation method based on the real-time feedback control principle according to claim 1 is characterized in that: The principle of the controller includes input signal, processing unit, output signal and feedback unit in sequence; Wherein, the input signal is a pressure sensor, a signal from an external environment or system, such as data detected by a sensor; The processing unit includes a pressure regulating valve, a PID controller and an ultra-high pressure pump, which are responsible for processing input signals and calculating corresponding control instructions according to preset rules or algorithms; The output signal is the indication of the pressure transmitter for display and storage, and the control instruction generated by the processing unit is used to drive the actuator to work; The feedback unit includes a pressure regulating device, a human-machine interaction interface and an alarm device, which monitors the actual response of the system and feeds back the information to the processing unit to adjust the control strategy and achieve more accurate control.

3. The high-precision and fast-response ultra-high pressure regulation method based on the real-time feedback control principle according to claim 2 is characterized in that: The pressure regulating device comprises a pressure source, a pressure regulating valve, a pressure sensor, a control system, an actuator, a safety valve, a pressure gauge, a pressure gauge and a pipeline, wherein the pressure source is a compressor.

4. The high-precision and fast-response ultra-high pressure regulation method based on the real-time feedback control principle according to claim 1 is characterized in that: The controller adopts PID control algorithm.

5. The high-precision and fast-response ultra-high pressure regulation method based on the real-time feedback control principle according to claim 3 is characterized in that: The actuator is a solenoid valve or a proportional valve.

6. The high-precision and fast-response ultra-high pressure regulation method based on the real-time feedback control principle according to claim 2 is characterized in that: The human-computer interaction interface includes a display and an indicator light.

7. The high-precision and fast-response ultra-high pressure regulation method based on the real-time feedback control principle according to claim 2 is characterized in that: The alarm device comprises a buzzer and a warning light.

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