Power supply circuit and zirconia oxygen content analyzer

Abstract

The invention relates to a power supply circuit and a zirconia oxygen content analyzer, and belongs to the technical field of zirconia solid electrolyte sensors, and the zirconia oxygen content analyzer integrates a zirconia oxygen content analyzer probe, a transmitter, a furnace body flange, three pairs of connecting cables and a filter. The system is high in integration, complete in function, high in stability and reliability, capable of improving working efficiency and safety, small in overall size, simple in structure and high in reliability, data transmission is conducted through the RS485 bus, and accuracy, stability, real-time performance and expandability of the system are guaranteed. And the power supply part completely adopts an isolation technology including AC-DC and DC-DC isolation, so that crosstalk between the power supply of the system and signals is avoided, the quality of the signals is not influenced, and the normal operation of the system is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of zirconium oxide solid electrolyte sensors, in particular to a power supply circuit and a zirconium oxide oxygen analyzer. Background Art

[0002] The zirconia oxygen analyzer consists of a zirconia oxygen detector (commonly known as an oxygen probe) and an oxygen transmitter. Nanomaterials and advanced production processes are used on the core component of the zirconia oxygen detector, the zirconia concentration cell, and additives that inhibit electrode aging are added to the electrode coating. This greatly improves the accuracy and service life of the zirconia measurement probe. The oxygen detector adopts a plug-in probe structure, does not require a sampling system, and can promptly reflect the combustion status in the boiler. If used in conjunction with an automatic control device, it can effectively control the combustion status. The converter adopts a single-chip intelligent design and a Chinese LCD display, making data display and function control more humane; it can be connected to various types of DCS data access equipment. This makes the operation of the instrument simple and easy to master.

[0003] In the prior art, for example, the Chinese patent number CN214503445U, "A zirconia oxygen analyzer", includes an analyzer body and a probe electrically connected thereto, the probe includes a detection tube, the detection tube includes a base tube and a sleeve with one end disposed inside the base tube and capable of moving along the axial direction of the base tube, the sleeve and the base tube are sealed at the connection, a heating furnace and a zirconia sensor are disposed inside the base tube, a connecting flange is disposed around the base tube, a junction box is disposed at the left end of the base tube, a smoke filter tube detachably and sealedly connected thereto is disposed at the right end of the sleeve, a drying tube detachably and sealedly connected thereto is disposed at the right end of the smoke filter tube, a porous ceramic filter and a drying box for absorbing water vapor are disposed in the smoke filter tube and the drying tube, respectively, and a desiccant is disposed in the drying box. Its beneficial effect is that it can solve the problems in the prior art that the length of the detection tube of the zirconia oxygen analyzer is low in adaptability and the accuracy of the zirconia sensor is easily affected or even fails.

[0004] There are still some disadvantages in the existing technology:

[0005] 1. Complexity of instrument calibration and maintenance: Currently, for zirconium oxide oxygen analyzers, regular calibration is a necessary means to correct instrument measurement errors, but there are many difficulties in the calibration process. The dust, humidity, radiation, and electromagnetic interference in different environments are different. If the location does not meet the conditions, systematic errors may occur.

[0006] 2. The problem of reduced accuracy due to sensor aging: Zirconia oxygen analyzer involves the field of industrial production, and has high requirements for measurement accuracy and sensitivity in the control system. After long-term use, the sensor will experience inversion of the zirconium oxide crystal, resulting in a decrease in sensitivity.

[0007] 3. Lack of compensation for system errors: There are errors in the overall system, which come from temperature, oxygen content, battery temperature, etc. If the errors are not corrected or compensated, the system stability, reliability and safety will be greatly reduced.

[0008] 4. The software control is not in-depth enough: The zirconia oxygen analyzer cannot accurately control the heating temperature to eliminate system errors. Summary of the invention

[0009] The present invention aims to solve the above technical problems and provides a power supply circuit and a zirconium oxide oxygen analyzer.

[0010] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0011] A power supply circuit includes 220VAC, wherein the 220V power supply circuit is reduced to a 24V power supply circuit after AC-AC isolation, and the 24V power supply circuit is connected in parallel with two DC-DC isolations, one of which is reduced to 5V after the DC-DC isolation and then reduced to 3V again, and the other of which is reduced to 13V and 10V after the DC-DC isolation and 10V and then reduced to 5V again.

[0012] Preferably, the 220V N line end of the 220V power supply circuit is connected to pin 1 of the voltage transformer L1, the 220V L line end is connected to pin 4 of the voltage transformer L1, pins 2 and 3 of the voltage transformer L1 are respectively connected to pin 1 and pin 2 of the step-down module U1, pin 6 of the step-down module U1 is connected to the inductor L2, and pin 4 of the step-down module U1 is divided into two paths, one path is grounded, and the other path is connected to C1 for filtering and connected to the other end of the inductor L2 to output 24V.

[0013] Preferably, the 24V of the 24V power supply circuit is connected to the capacitor C2, one end of the resistor R1 and the 5th pin of the buck chip U2, the other end of the resistor R1 is connected to the 4th pin of the buck chip U2, the other end of the capacitor C2 is connected to the resistor R2, the capacitor C3 is connected in series between the 6th pin and the 1st pin of the buck chip U2, the 2nd pin of the buck chip U2 is connected to the Schottky diode D1 and grounded, and the other end of the Schottky diode D1 is respectively connected to the 6th pin of the buck chip U2 and the inductor L3, the other end of the inductor L3 is connected to the 5th pin of the buck chip U3, the capacitor C4, one end of the resistor R3 and the other end of the capacitor C4. One end is grounded, the other ends of the resistors R3 and R2 and pin 3 of the buck chip U2 are grounded, pins 4 and 6 of the buck chip U3 are connected to pins 4 and 2 of the transformer T1 respectively, pin 2 of the buck chip U3 is grounded, pins 5 and 8 of the transformer T1 are connected to pins 1 and 2 of the buck chip D3 respectively, pins 6 and 7 of the transformer T1 are connected, pin 4 of the buck chip D3 is grounded, pin 3 of the buck chip D3 outputs 13V, pins 3 and 1 of the transformer T1 are connected to pins 2 and 1 of the buck chip D2 respectively, pin 3 of the buck chip D2 outputs 10V, and pin 4 of the buck chip D2 is grounded.

[0014] Preferably, the 10V is connected to pin 3 of the buck chip U4, pin 2 of the buck chip U4 outputs 5V and is connected to one end of the capacitor C5, and pin 1 of the buck chip U4 and the other end of the capacitor C5 are grounded.

[0015] Preferably, the 24V of the other 24V power supply circuit is connected to pin 2 of the step-down chip U5, pin 1 of the step-down chip U5 is grounded, pin 3 of the step-down chip U5 is connected to capacitor C6 and pin 3 of the step-down chip U6, pin 5 of the step-down chip U5, the other end of the capacitor C6, pin 2 of the step-down chip U6 and pin 1 of the step-down chip U6 are all grounded, and pin 4 of the step-down chip U6 outputs 3V.

[0016] The zirconia oxygen analyzer comprises a control instrument, wherein the control instrument is respectively connected to a probe, a transmitter, a furnace flange, three pairs of connection cables and a filter;

[0017] The control instrument comprises a zirconia signal and temperature signal acquisition module, a two-way analog signal conversion module, a current signal output module, a four-way editable relay output module, a power supply circuit and a display device;

[0018] The control instrument is connected to the automatic calibration system and the self-diagnosis module.

[0019] The current signal output module can convert the oxygen content data obtained by measurement into a 4-20mA current signal for transmission, so as to be received and processed by other devices or systems.

[0020] Preferably, the display device is a monitor or a display screen, using a 3.5-inch serial port display screen interface, which can display the current output value, local potential and electric furnace temperature in real time.

[0021] Preferably, the four-way editable relay output module is used to control the operation of different functions, and realizes high alarm, low alarm, fault alarm, backflush, automatic zero point calibration and automatic calibration of calibration gas functions by controlling the output of the relay.

[0022] Preferably, the probe monitors and changes the temperature of the heating furnace in real time, and automatically corrects the PID parameters through the sensor visual probe heating and temperature control, so that the temperature is controlled within ±1°C.

[0023] After adopting the above structure, the present invention has the following advantages:

[0024] The analyzer of the present invention integrates a zirconia oxygen analyzer probe, a transmitter, a furnace flange, three pairs of connecting cables, and a filter. It has high integration, complete functions, high stability and reliability, improves work efficiency and safety, uses RS485 bus for data transmission, has a small overall size, simple structure, high reliability, and ensures the accuracy, stability, real-time performance and scalability of the system.

[0025] The power supply part adopts isolation technology, including AC-DC and DC-DC isolation, to ensure that the power supply and signal of the system will not cause crosstalk and affect the quality of the signal, thus ensuring the normal operation of the system.

[0026] The above summary is for illustrative purposes 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

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions 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 paying creative work.

[0028] Figure 1 It is a circuit framework diagram of the present invention;

[0029] Figure 2 is a circuit diagram of the present invention;

[0030] Figure 3 It is the overall framework diagram of the system of the present invention;

[0031] Figure 4 It is a control instrument framework diagram of the present invention;

[0032] Figure 5 It is a schematic diagram of on-site installation of the present invention;

[0033] Figure 6 It is a schematic diagram of fault detection of the present invention. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0035] In the description of this application, it should be noted that, 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

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

[0037] Combined with Figure 1-Figure 6 A power supply circuit includes 220VAC, the 220V power supply circuit is reduced to a 24V power supply circuit after AC-AC isolation, the 24V power supply circuit is connected to two DC-DC isolations in parallel, one of which is reduced to 5V after the DC-DC isolation and then to 3V again, and the other of which is reduced to 13V and 10V after the DC-DC isolation and 10V and then to 5V again.

[0038] The 220V N line end of the 220V power supply circuit is connected to pin 1 of the voltage transformer L1, the 220V L line end is connected to pin 4 of the voltage transformer L1, pins 2 and 3 of the voltage transformer L1 are respectively connected to pin 1 and pin 2 of the step-down module U1, pin 6 of the step-down module U1 is connected to the inductor L2, and pin 4 of the step-down module U1 is divided into two paths, one path is grounded, and the other path is connected to C1 for filtering and connected to the other end of the inductor L2 to output 24V.

[0039] The 24V of the 24V power supply circuit is connected to capacitor C2, one end of resistor R1 and pin 5 of step-down chip U2, the other end of resistor R1 is connected to pin 4 of step-down chip U2, the other end of capacitor C2 is connected to resistor R2, capacitor C3 is connected in series between pin 6 and pin 1 of step-down chip U2, pin 2 of step-down chip U2 is connected to Schottky diode D1 and ground, and the other end of Schottky diode D1 is respectively connected to pin 6 of step-down chip U2 and inductor L3, the other end of inductor L3 is connected to pin 5 of step-down chip U3, capacitor C4, one end of resistor R3 and the other end of capacitor C4 Grounded, the other end of the resistor R3 and the resistor R2 and pin 3 of the buck chip U2 are grounded, the 4th and 6th pins of the buck chip U3 are connected to the 4th and 2nd pins of the transformer T1 respectively, the 2nd pin of the buck chip U3 is grounded, the 5th and 8th pins of the transformer T1 are connected to the 1st and 2nd pins of the buck chip D3 respectively, the 6th and 7th pins of the transformer T1 are connected, the 4th pin of the buck chip D3 is grounded, the 3rd pin of the buck chip D3 outputs 13V, the 3rd and 1st pins of the transformer T1 are connected to the 2nd and 1st pins of the buck chip D2 respectively, the 3rd pin of the buck chip D2 outputs 10V, and the 4th pin of the buck chip D2 is grounded.

[0040] The 10V is connected to the 3rd pin of the buck chip U4, the 2nd pin of the buck chip U4 outputs 5V and is connected to one end of the capacitor C5, and the 1st pin of the buck chip U4 and the other end of the capacitor C5 are grounded.

[0041] The 24V of the other 24V power supply circuit is connected to pin 2 of the step-down chip U5, pin 1 of the step-down chip U5 is grounded, pin 3 of the step-down chip U5 is connected to capacitor C6 and pin 3 of the step-down chip U6, pin 5 of the step-down chip U5, the other end of the capacitor C6, pin 2 of the step-down chip U6 and pin 1 of the step-down chip U6 are all grounded, and pin 4 of the step-down chip U6 outputs 3V.

[0042] Embodiment 1:

[0043] like Figure 1 and Figure 2 As shown, the circuit is fed with 220V AC power, which is isolated by the voltage transformer L1 for AC-AC and then enters the step-down module U1 to be stepped down to 24V, which is smoothed by the inductor L2 and filtered by C1 before being output. The 24V power supply is reduced to 7V by the step-down module U2 and its peripheral circuits, and then output through the transformer T1, converted to 10V by the step-down chip D2, and converted to 13V by the step-down chip D3. The 10V voltage is reduced to 5V by the step-down chip U4, and the power supply is filtered by the capacitor C5. The 24V voltage is reduced to 5V by the step-down chip U5, and the power supply is filtered by the capacitor C6, and then reduced to 3.3V by the step-down chip U6 before being output.

[0044] Embodiment 2:

[0045] The zirconia oxygen analyzer made by using the power supply circuit includes a control instrument, wherein the control instrument is respectively connected to a probe, a transmitter, a furnace flange, three pairs of connection cables and a filter;

[0046] The control instrument comprises a zirconia signal and temperature signal acquisition module, a two-way analog signal conversion module, a current signal output module, a four-way editable relay output module, a power supply circuit and a display device;

[0047] The control instrument is connected to the automatic calibration system and the self-diagnosis module.

[0048] The current signal output module can convert the oxygen content data obtained by measurement into a 4-20mA current signal for transmission, so as to be received and processed by other devices or systems.

[0049] The display device is a display or a display screen, which uses a 3.5-inch serial port display screen interface and can display the current output value, local potential and electric furnace temperature in real time.

[0050] The four-way editable relay output module is used to control the operation of different functions. By controlling the output of the relay, high alarm, low alarm, fault alarm, backflush, automatic zero point calibration and automatic calibration of calibration gas functions are realized.

[0051] The probe monitors and changes the temperature of the heating furnace in real time, and automatically corrects the PID parameters through the sensor visual probe heating and temperature control, so that the temperature is controlled within ±1°C.

[0052] The multifunctional zirconia oxygen analyzer of the present invention integrates a zirconia oxygen analyzer probe, a transmitter, a furnace flange, three pairs of connecting cables, and a filter. The technical field involved in a multifunctional zirconia oxygen analyzer mainly includes the design of the transmitter, the heating control of the probe, the transmission technology of data and signals, etc. In this technical field, some key technical problems that need to be solved include:

[0053] Transmitter design: The transmitter is an embedded system that requires software and hardware control. This includes selecting a suitable MCU, overall circuit design, photoelectric isolation of analog signals and power circuits, software control algorithms for probe heating, instrument calibration, system self-test functions, collaborative work of various parts, and overall system structure layout. This ensures the accuracy, stability, and scalability of the system.

[0054] Error correction and compensation technology: There are many methods for instrument calibration and correction. This system uses two-point calibration on the output and cold-end compensation on the temperature. This is one of the most widely used and practical methods in the current technical field.

[0055] Data and signal transmission technology: A multifunctional zirconium oxide oxygen analyzer requires strong communication support. The system is used in the field of industrial production and needs to solve problems such as long transmission distance, strong anti-interference ability, data integrity and real-time performance to ensure the stability and reliability of the system.

[0056] The zirconia oxygen analyzer of the present invention: The present invention integrates a zirconia oxygen analyzer probe, a transmitter, a furnace flange, three pairs of connecting cables, and a filter. The transmitter includes the collection and display of zirconia signals and temperature signals, two-way analog signal conversion, current signal output, four-way editable relay output, power supply circuit, etc. At present, a multifunctional zirconia oxygen analyzer has appeared for the first time. The system has high integration, complete functions, high stability and reliability, and improves work efficiency and safety.

[0057] Automatic calibration system and self-diagnosis module: The instrument performs input and output calibration, unifies the data, and sets the zircon head background electromotive force, which is equivalent to the zircon head zero position. When the sensor is working, it should detect the probe elements in real time to determine whether the zirconium cell, thermocouple, and heating furnace are intact, and detect the internal resistance of the zirconium cell after heating.

[0058] Current signal output: Current transmission is a common industrial signal transmission method. The oxygen content data measured by the zirconia oxygen analyzer can be converted into a 4-20mA current signal for transmission, which can be received and processed by other devices or systems.

[0059] Data information display: The zirconium oxide oxygen analyzer has a 3.5-inch serial display interface, which can display the current output value, local potential, furnace temperature and other information in real time, and the system parameters can be modified through the menu.

[0060] Four-way editable relay output: used to control the operation of different functions. By controlling the output of the relay, high alarm, low alarm, fault alarm, backflush, automatic zero calibration, automatic calibration of calibration gas and other functions can be realized, and these functions can be changed through software programs, such as Figure 6 As shown, the temperature collection and zirconium potential collection are judged to see if the data is wrong. If so, an alarm is triggered, and if not, it is displayed on the display device.

[0061] Probe heating control: Probe heating control is very important in the zirconia oxygen analyzer, which is used to monitor and change the temperature of the heating furnace in real time. In order to improve the precise control of temperature, a large number of advanced algorithms are added to the probe. The sensor can automatically correct the PID parameters according to the heating and temperature control of the probe, so that the temperature is controlled within ±1°C, which is crucial for the temperature control and safety of the heating furnace.

[0062] Power supply circuit: The power supply part of the multifunctional zirconia oxygen analyzer of the present invention adopts isolation technology, including AC-DC and DC-DC isolation, which ensures that the power supply and signal of the system will not generate crosstalk and affect the quality of the signal, thereby ensuring the normal operation of the system.

[0063] The present invention can improve the accuracy, efficiency and safety of industrial production. The following are the advantages of the present invention:

[0064] 1. Accurate temperature control: The system can detect and feedback the heating furnace status in real time, and use advanced control algorithms to greatly reduce the error of detection data, and ultimately achieve more accurate temperature control. This is crucial for maintaining the temperature of the heating furnace, industrial production safety, and accurately improving efficiency.

[0065] 2. Quick response: The present invention adopts RS485 bus for data transmission, which has long transmission distance, fast communication speed and high efficiency, ensuring more stable, timely, safe and reliable data communication of the system.

[0066] 3. Fault detection: This system has a fault detection mechanism that can detect faults in the circuits of each module. When a problem is detected, it will be fed back to the control panel in a timely manner to ensure that the heating furnace can work safely.

[0067] 4. Integration: A multifunctional zirconia oxygen analyzer integrates zirconia signal acquisition and display, two-way analog signal conversion, current signal output, four-way editable relay output, including automatic calibration system and self-diagnosis function, probe heating control, data and signal transmission technology, etc. Ensure that the whole system works together to improve the overall performance of industrial production.

[0068] The present invention and its embodiments are described above, and such description is not restrictive. What is shown in the full text is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A power supply circuit, characterized in that: Including 220VAC, the 220V power supply circuit is reduced to a 24V power supply circuit after AC-AC isolation, the 24V power supply circuit is connected to two DC-DC isolations in parallel, one of which is reduced to 5V after the DC-DC isolation and then to 3V again, and the other of which is reduced to 13V and 10V after the DC-DC isolation and 10V and then to 5V again.

2. A power supply circuit according to claim 1, characterized in that: The 220V N line end of the 220V power supply circuit is connected to pin 1 of the voltage transformer L1, the 220V L line end is connected to pin 4 of the voltage transformer L1, pins 2 and 3 of the voltage transformer L1 are respectively connected to pin 1 and pin 2 of the step-down module U1, pin 6 of the step-down module U1 is connected to the inductor L2, and pin 4 of the step-down module U1 is divided into two paths, one path is grounded, and the other path is connected to C1 for filtering and connected to the other end of the inductor L2 to output 24V.

3. A power supply circuit according to claim 1, characterized in that: The 24V of the 24V power supply circuit is connected to capacitor C2, one end of resistor R1 and pin 5 of step-down chip U2, the other end of resistor R1 is connected to pin 4 of step-down chip U2, the other end of capacitor C2 is connected to resistor R2, capacitor C3 is connected in series between pin 6 and pin 1 of step-down chip U2, pin 2 of step-down chip U2 is connected to Schottky diode D1 and ground, and the other end of Schottky diode D1 is respectively connected to pin 6 of step-down chip U2 and inductor L3, the other end of inductor L3 is connected to pin 5 of step-down chip U3, capacitor C4, one end of resistor R3 and the other end of capacitor C4 Grounded, the other end of the resistor R3 and the resistor R2 and pin 3 of the buck chip U2 are grounded, the 4th and 6th pins of the buck chip U3 are connected to the 4th and 2nd pins of the transformer T1 respectively, the 2nd pin of the buck chip U3 is grounded, the 5th and 8th pins of the transformer T1 are connected to the 1st and 2nd pins of the buck chip D3 respectively, the 6th and 7th pins of the transformer T1 are connected, the 4th pin of the buck chip D3 is grounded, the 3rd pin of the buck chip D3 outputs 13V, the 3rd and 1st pins of the transformer T1 are connected to the 2nd and 1st pins of the buck chip D2 respectively, the 3rd pin of the buck chip D2 outputs 10V, and the 4th pin of the buck chip D2 is grounded.

4. A power supply circuit according to claim 3, characterized in that: The 10V is connected to the 3rd pin of the buck chip U4, the 2nd pin of the buck chip U4 outputs 5V and is connected to one end of the capacitor C5, and the 1st pin of the buck chip U4 and the other end of the capacitor C5 are grounded.

5. A power supply circuit according to claim 1, characterized in that: The 24V of the other 24V power supply circuit is connected to pin 2 of the step-down chip U5, pin 1 of the step-down chip U5 is grounded, pin 3 of the step-down chip U5 is connected to capacitor C6 and pin 3 of the step-down chip U6, pin 5 of the step-down chip U5, the other end of the capacitor C6, pin 2 of the step-down chip U6 and pin 1 of the step-down chip U6 are all grounded, and pin 4 of the step-down chip U6 outputs 3V.

6. A zirconia oxygen analyzer made using the power supply circuit according to any one of claims 1 to 5, characterized in that: It includes a control instrument, and the control instrument is respectively connected to the probe, the transmitter, the furnace flange, three pairs of connection cables and the filter; The control instrument comprises a zirconia signal and temperature signal acquisition module, a two-way analog signal conversion module, a current signal output module, a four-way editable relay output module, a power supply circuit and a display device; The control instrument is connected to the automatic calibration system and the self-diagnosis module.

7. The zirconium oxide oxygen analyzer according to claim 6, characterized in that: The current signal output module can convert the oxygen content data obtained by measurement into a 4-20mA current signal for transmission, so as to be received and processed by other devices or systems.

8. The zirconium oxide oxygen analyzer according to claim 6, characterized in that: The display device is a display or a display screen, which uses a 3.5-inch serial port display screen interface and can display the current output value, local potential and electric furnace temperature in real time.

9. The zirconium oxide oxygen analyzer according to claim 6, characterized in that: The four-way editable relay output module is used to control the operation of different functions. By controlling the output of the relay, high alarm, low alarm, fault alarm, backflush, automatic zero point calibration and automatic calibration of calibration gas functions are realized.

10. The zirconium oxide oxygen analyzer according to claim 6, characterized in that: The probe monitors and changes the temperature of the heating furnace in real time, and automatically corrects the PID parameters through the sensor visual probe heating and temperature control, so that the temperature is controlled within ±1°C.

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