Intelligent temperature control system for zirconia oxygen analyzer

Abstract

The utility model belongs to the technical field of industrial production temperature control, particularly relates to an intelligent temperature control system for a zirconium oxide oxygen analyzer, and belongs to the technical field of industrial production temperature control. The zirconium oxide oxygen analyzer highly integrates the zirconium oxide oxygen analyzer body, the temperature detection module, the zirconium potential acquisition circuit, the phase detection circuit, the heating control circuit, the display device and the like. For an intelligent temperature control system, the requirements for accurate temperature detection, accurate temperature control, rapid system heating and controllable output power are high. A fuzzy PID algorithm, a Kalman filtering algorithm, a compensation algorithm and the like are used in software, cold end compensation, phase detection, heating control and the like are adopted in hardware, and accuracy, safety, real-time performance and expansibility of the system are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial production temperature control, in particular to an intelligent temperature control system for a zirconium oxide oxygen analyzer. Background Art

[0002] Zirconia analyzers are primarily used in inert gas reactors, argon or nitrogen purification, combustion control in boilers and incinerators, filling and canning gas cylinders in gas plants, marine inert gas generators, CO2 purity testing in the brewing industry, and heat treatment furnaces. These applications require robust temperature control technology. Industrial production systems must address numerous factors, including the diverse range of heating objects, high temperature control requirements, and heating rates, ensuring stable and reliable operation across diverse systems. This presents a significant technical challenge.

[0003] There are still some shortcomings in the existing technology:

[0004] 1. Heating control technology: Currently, most intelligent temperature control systems for zirconia oxygen analyzers use zero-crossing triggering and switching heating methods, which results in long heating cycles, low temperature accuracy, and oscillations at the desired heating temperature.

[0005] 2. The applicable system is too single: Zirconia oxygen analyzer involves the field of industrial production, and there are many types of heating systems. Different temperature control systems require different heating controls, and there are high requirements for the versatility of the intelligent temperature control system.

[0006] 3. The software's control algorithm is simple and not in-depth enough: The intelligent temperature control system of the zirconia oxygen analyzer needs to precisely control the temperature to eliminate system errors.

[0007] 4. Lack of compensation for system errors: The overall system has errors, which come from many factors such as cold junction potential and oxygen content. If these errors are not corrected or compensated, the system stability, reliability, and safety will be greatly reduced. Utility Model Content

[0008] The utility model aims to solve the above technical problems and provides an intelligent temperature control system for a zirconia oxygen analyzer.

[0009] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0010] An intelligent temperature control system for a zirconium oxide oxygen analyzer, comprising

[0011] Zirconia oxygen analyzer body, used for integrating and assembling the shell body of the parts;

[0012] Temperature detection module, used for real-time detection and feedback of heating status, and collection of the temperature of the heating object;

[0013] When the zirconium potential acquisition circuit is used for thermocouple acquisition, the change in cold end temperature will affect the acquisition temperature. The bridge compensation method is added to correct the system temperature. The electromotive force generated by the unbalanced bridge is used to compensate for the thermoelectric potential change caused by the change in the cold end temperature of the thermocouple.

[0014] The phase detection circuit uses a phase-triggered heating method to set the conduction angle of the thyristor, which can control the conduction frequency of the heating, making the system's response faster and the temperature control more accurate;

[0015] Heating control circuit; used to control the heating of the heating object, control the temperature of the heating object in real time, and achieve automatic adjustment by controlling the heating coefficient;

[0016] Display device: a display screen for displaying local potential, system temperature, time, and system parameters can be changed through the menu.

[0017] Preferably, the heating control circuit includes a heating port, a heating object, a heating control port, a photocoupler U1, a photocoupler U2 and a P-MOS.

[0018] Preferably, pin 1 of the photocoupler U1 is connected to 3V3 through a series resistor R3, and pin 1 of the photocoupler U2 is connected to 3V3 through a series resistor R5. The heating incision is connected to pin 2 of the photocoupler U1, and pin 4 of the photocoupler U1 is connected to resistor R2. The other end of the resistor R2 is respectively connected to the resistor R1 and the G pole of the P-MOS. The other end of the resistor R1 is combined with the S pole of the P-MOS to connect to VCC, and the D pole of the P-MOS is respectively connected to the resistor R4, the diode D2 and the relay Relay1. The other end of the resistor R4 is connected to the indicator light LED0, and the other end of the indicator light LED0, the 3rd pin of the photocoupler U1, the other end of the diode D2 and One end of the relay Relay1 is grounded, the heating control port is connected to pin 2 of the photoelectric coupler U2, pin 3 of the photoelectric coupler U2 is grounded, and pin 4 of the photoelectric coupler U2 is connected to the bidirectional thyristor driver. The heating objects are divided into two paths, one path is connected to one end of the switch of the relay Relay1, and the other path is connected to the resistor R6, the first anode of the bidirectional thyristor Q2 and one end of the resistor R7. The bidirectional thyristor driver is connected to the control stage of the bidirectional thyristor Q2 and the other end of the resistor R7. The other end of the resistor R6 is connected to the capacitor C1. The bidirectional thyristor driver is combined with the second anode of the bidirectional thyristor Q2 and the other end of the capacitor C1 to connect the other end of the switch of the relay Relay1.

[0019] Preferably, the phase detection circuit includes 220VAC, a voltage transformer connected to 220VAC, and a phase detection port.

[0020] Preferably, the voltage transformer is divided into two paths and respectively connected to pins 2 and 3 of the operational amplifier U3, a resistor R11 is connected in parallel between the two paths divided by the voltage transformer, pin 4 of the operational amplifier U3 is grounded, pin 1 of the operational amplifier U3 is connected to one end of the resistor R10 and pin 2 of the photoelectric coupler U4, pin 1 of the photoelectric coupler U4 is connected to one end of the resistor R8, the other end of the resistor R8, the other end of the resistor R10 and pin 8 of the operational amplifier U3 are connected to VCC, pin 3 of the photoelectric coupler U4 is connected to the 3V3 ground wire, pin 4 of the photoelectric coupler U4 is connected to the phase detection port and one end of the resistor R9, and the other end of the resistor R9 is connected to 3V3.

[0021] Preferably, the temperature algorithm process of the heating control circuit is as follows: the MCU collects the temperature of the system, and then performs temperature compensation calculation through Kalman filtering, fuzzy PID and compensation algorithm to correct the system temperature.

[0022] Preferably, the phase-triggered heating method is that the MCU receives a phase detection signal, controls the heating object through a heating control circuit, generates a temperature change, performs temperature detection through a temperature detection module, and transmits the temperature to the MCU.

[0023] After adopting the above structure, the utility model has the following advantages:

[0024] This utility model highly integrates a zirconia oxygen analyzer, a temperature detection module, a zirconium potential acquisition circuit, a phase detection circuit, a heating control circuit, and a display device. Intelligent temperature control systems demand precise temperature detection and control, rapid system heating, and controllable output power. The software utilizes fuzzy PID algorithms, Kalman filtering, and compensation algorithms, while the hardware incorporates cold-junction compensation, phase detection, and heating control, ensuring system accuracy, security, real-time performance, and scalability.

[0025] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or technical descriptions. 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 paying any creative work.

[0027] Figure 1 This is the overall framework diagram of the system of the utility model;

[0028] Figure 2 This is a comparison diagram of the heating methods of the present utility model;

[0029] Figure 3 This is a flow chart of the temperature control algorithm of the utility model;

[0030] Figure 4 This is a flow chart of the phase-triggered heating method of the present utility model;

[0031] Figure 5 This is a heating control circuit diagram of the utility model;

[0032] Figure 6 This is a phase detection circuit diagram of the utility model;

[0033] Figure 7 This is a signal acquisition circuit diagram of the utility model. DETAILED DESCRIPTION

[0034] Specific embodiments of the present invention will now be mentioned in detail. Although the present invention is described in conjunction with these specific embodiments, it should be appreciated that the present invention is not intended to be limited to these specific embodiments. On the contrary, these embodiments are intended to cover alternatives, variations, or equivalent embodiments that may be included within the spirit and scope of the present invention as defined by the claims. In the following description, a large number of specific details are set forth in order to provide a comprehensive understanding of the present invention. The present invention can be implemented without some or all of these specific details. In other cases, in order not to unnecessarily obscure the present invention, well-known process operations are not described in detail.

[0035] When used in conjunction with "including," "methods comprising," or similar language in this specification and the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0036] The present invention will be described in further detail below in conjunction with the full text.

[0037] Combined with attachment Figure 1-Figure 7 , an intelligent temperature control system for a zirconia oxygen analyzer, comprising a zirconia oxygen analyzer body, a housing body for integrating and assembling components;

[0038] Temperature detection module, used for real-time detection and feedback of heating status, and collection of the temperature of the heating object;

[0039] When the zirconium potential acquisition circuit is used for thermocouple acquisition, the change in cold end temperature will affect the acquisition temperature. The bridge compensation method is added to correct the system temperature. The electromotive force generated by the unbalanced bridge is used to compensate for the thermoelectric potential change caused by the change in the cold end temperature of the thermocouple.

[0040] The phase detection circuit uses a phase-triggered heating method to set the conduction angle of the thyristor, which can control the conduction frequency of the heating, making the system's response faster and the temperature control more accurate;

[0041] Heating control circuit; used to control the heating of the heating object, control the temperature of the heating object in real time, and achieve automatic adjustment by controlling the heating coefficient;

[0042] Display device: a display screen for displaying local potential, system temperature, time, and system parameters can be changed through the menu.

[0043] The heating control circuit includes a heating port, a heating object, a heating control port, a photoelectric coupler U1, a photoelectric coupler U2 and a P-MOS.

[0044] Pin 1 of the photocoupler U1 is connected to 3V3 through a series resistor R3, and pin 1 of the photocoupler U2 is connected to 3V3 through a series resistor R5. The heating incision is connected to pin 2 of the photocoupler U1, and pin 4 of the photocoupler U1 is connected to resistor R2. The other end of the resistor R2 is respectively connected to the resistor R1 and the G pole of the P-MOS. The other end of the resistor R1 is combined with the S pole of the P-MOS to connect to VCC, and the D pole of the P-MOS is respectively connected to the resistor R4, the diode D2 and the relay Relay1. The other end of the resistor R4 is connected to the indicator light LED0, and the other end of the indicator light LED0, pin 3 of the photocoupler U1, the other end of the diode D2 and the relay One end of the relay Relay1 is grounded, the heating control port is connected to pin 2 of the photocoupler U2, pin 3 of the photocoupler U2 is grounded, and pin 4 of the photocoupler U2 is connected to the bidirectional thyristor driver. The heating objects are respectively divided into two paths, one path is connected to one end of the switch of the relay Relay1, and the other path is connected to the resistor R6, the first anode of the bidirectional thyristor Q2 and one end of the resistor R7. The bidirectional thyristor driver is connected to the control stage of the bidirectional thyristor Q2 and the other end of the resistor R7. The other end of the resistor R6 is connected to the capacitor C1. The bidirectional thyristor driver is combined with the second anode of the bidirectional thyristor Q2 and the other end of the capacitor C1 to connect the other end of the switch of the relay Relay1.

[0045] The phase detection circuit includes 220VAC, a voltage transformer connected to 220VAC, and a phase detection port.

[0046] The voltage transformer branches out into two paths and is respectively connected to pins 2 and 3 of the operational amplifier U3. A resistor R11 is connected in parallel between the two paths branched out of the voltage transformer. Pin 4 of the operational amplifier U3 is grounded. Pin 1 of the operational amplifier U3 is connected to one end of the resistor R10 and pin 2 of the photoelectric coupler U4. Pin 1 of the photoelectric coupler U4 is connected to one end of the resistor R8. The other end of the resistor R8, the other end of the resistor R10, and pin 8 of the operational amplifier U3 are connected to VCC. Pin 3 of the photoelectric coupler U4 is connected to the 3V3 ground wire. Pin 4 of the photoelectric coupler U4 is connected to the phase detection port and one end of the resistor R9. The other end of the resistor R9 is connected to 3V3.

[0047] The temperature algorithm process of the heating control circuit is as follows: the MCU collects the temperature of the system, and then performs temperature compensation calculation through Kalman filtering, fuzzy PID and compensation algorithm to correct the system temperature.

[0048] The phase-triggered heating method is that the MCU receives the phase detection signal, controls the heating object through the heating control circuit, generates temperature changes, performs temperature detection through the temperature detection module, and transmits the temperature to the MCU.

[0049] Example 1:

[0050] like Figure 5-Figure 7 As shown, when the heating cut-off voltage is low, optocoupler U1 conducts, Q1 also conducts, and Relay 1 is energized. When the heating cut-off voltage is high, optocoupler U1 turns off, Q1 is off, and Relay 1 is disconnected. When the heating control voltage is low, optocoupler U2 conducts, and triac Q2 also conducts; otherwise, triac Q2 is off. Heating occurs only when both the heating cut-off voltage and the heating control voltage are low; otherwise, heating does not occur. Q1 is a P-MOS transistor, and Relay 1 is a relay. 220V AC power enters, passes through a voltage transformer, and enters operational amplifier U3. Operational amplifier U3 compares the phase and outputs a high and low voltage level. When the output is low, the phase detection voltage detects a high level; otherwise, when it detects a low level, the temperature change is reflected by the resistance of Rt, which generates a voltage difference at the bridge output. Rt is a thermistor.

[0051] Example 2:

[0052] The utility model discloses an intelligent temperature control system for a zirconia oxygen analyzer, which integrates a zirconia oxygen analyzer body, a temperature detection circuit, a zirconium potential acquisition circuit, a phase detection circuit, a heating control circuit, and a display device.

[0053] Intelligent Temperature Control System: This utility model includes a zirconia oxygen analyzer, a temperature detection circuit, a zirconium potential acquisition circuit, a phase detection circuit, a heating control circuit, and a display device. This is the first intelligent temperature control system for a zirconia oxygen analyzer to be developed. This system offers high accuracy and reliability, improving efficiency, quality, and safety.

[0054] Controllable power output: The core of this utility model is the controllable power output. In different heating systems, accurate temperature and fast response are required. The heating system before this usually uses zero-crossing trigger circuit, which leads to a long control cycle, such as Figure 2 As shown, the utility model can set the conduction angle of the thyristor and control the conduction frequency of the heating, so that the system responds faster, the temperature control is more accurate, and the applicability is greatly enhanced.

[0055] Signal acquisition circuit design: When thermocouples are collecting data, changes in the cold-junction temperature affect the collected data. This system incorporates a bridge compensation method to correct the system temperature. This method uses the electromotive force generated by an unbalanced bridge to compensate for the changes in thermoelectric potential caused by changes in the thermocouple's cold-junction temperature. The hardware circuit is simple to implement, offers stable performance, and is low-cost.

[0056] Data display and control: The intelligent temperature control system has a 3.5-inch serial port display interface, which can display local potential, system temperature and other information in real time, and the system parameters can be modified through the menu.

[0057] This system provides real-time monitoring and feedback on heating status, employing advanced control algorithms to significantly reduce errors in detection data, ultimately achieving more precise temperature control. This is crucial for maintaining system temperature, product quality, output rate, and industrial safety. Using controlled power output for heating, precise temperature control, fast response, and robust adaptability ensure a more stable, timely, safe, and reliable system.

[0058] The utility model discloses an intelligent temperature control system for zirconium oxide oxygen analyzer, which adopts a phase-triggered heating method. In different heating systems, the conduction angle of the thyristor is set to control the conduction frequency of the heating, making the system's response faster and the temperature control more accurate.

[0059] The above description of the present invention and its embodiments is non-limiting. What is shown in the full text is only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs a structure and embodiment similar to the technical solution without creatively designing, they shall fall within the scope of protection of the present invention.

Claims

1. An intelligent temperature control system for a zirconium oxide oxygen analyzer, characterized in that: include Zirconia oxygen analyzer body, used for integrating and assembling the shell body of the parts; Temperature detection module, used for real-time detection and feedback of heating status, and collection of the temperature of the heating object; When the zirconium potential acquisition circuit is used for thermocouple acquisition, the change in cold end temperature will affect the acquisition temperature. The bridge compensation method is added to correct the system temperature. The electromotive force generated by the unbalanced bridge is used to compensate for the thermoelectric potential change caused by the change in the cold end temperature of the thermocouple. The phase detection circuit uses a phase-triggered heating method to set the conduction angle of the thyristor, which can control the conduction frequency of the heating, making the system's response faster and the temperature control more accurate; Heating control circuit; used to control the heating of the heating object, control the temperature of the heating object in real time, and achieve automatic adjustment by controlling the heating coefficient; Display device: a display screen for displaying local potential, system temperature, time, and system parameters can be changed through the menu.

2. The intelligent temperature control system for a zirconia oxygen analyzer according to claim 1, characterized in that: The heating control circuit includes a heating port, a heating object, a heating control port, a photoelectric coupler U1, a photoelectric coupler U2 and a P-MOS.

3. The intelligent temperature control system for a zirconia oxygen analyzer according to claim 2, characterized in that: Pin 1 of the photocoupler U1 is connected to 3V3 through a series resistor R3, and pin 1 of the photocoupler U2 is connected to 3V3 through a series resistor R5. The heating incision is connected to pin 2 of the photocoupler U1, and pin 4 of the photocoupler U1 is connected to resistor R2. The other end of the resistor R2 is respectively connected to the resistor R1 and the G pole of the P-MOS. The other end of the resistor R1 is combined with the S pole of the P-MOS to connect to VCC, and the D pole of the P-MOS is respectively connected to the resistor R4, the diode D2 and the relay Relay1. The other end of the resistor R4 is connected to the indicator light LED0, and the other end of the indicator light LED0, pin 3 of the photocoupler U1, the other end of the diode D2 and the relay One end of the relay Relay1 is grounded, the heating control port is connected to pin 2 of the photocoupler U2, pin 3 of the photocoupler U2 is grounded, and pin 4 of the photocoupler U2 is connected to the bidirectional thyristor driver. The heating objects are respectively divided into two paths, one path is connected to one end of the switch of the relay Relay1, and the other path is connected to the resistor R6, the first anode of the bidirectional thyristor Q2 and one end of the resistor R7. The bidirectional thyristor driver is connected to the control stage of the bidirectional thyristor Q2 and the other end of the resistor R7. The other end of the resistor R6 is connected to the capacitor C1. The bidirectional thyristor driver is combined with the second anode of the bidirectional thyristor Q2 and the other end of the capacitor C1 to connect the other end of the switch of the relay Relay1.

4. The intelligent temperature control system for a zirconia oxygen analyzer according to claim 1, characterized in that: The phase detection circuit includes 220VAC, a voltage transformer connected to 220VAC, and a phase detection port.

5. The intelligent temperature control system for a zirconia oxygen analyzer according to claim 4, characterized in that: The voltage transformer branches out into two paths and is respectively connected to pins 2 and 3 of the operational amplifier U3. A resistor R11 is connected in parallel between the two paths branched out of the voltage transformer. Pin 4 of the operational amplifier U3 is grounded. Pin 1 of the operational amplifier U3 is connected to one end of the resistor R10 and pin 2 of the photoelectric coupler U4. Pin 1 of the photoelectric coupler U4 is connected to one end of the resistor R8. The other end of the resistor R8, the other end of the resistor R10, and pin 8 of the operational amplifier U3 are connected to VCC. Pin 3 of the photoelectric coupler U4 is connected to the 3V3 ground wire. Pin 4 of the photoelectric coupler U4 is connected to the phase detection port and one end of the resistor R9. The other end of the resistor R9 is connected to 3V3.

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