High-voltage pulse generating device for glow discharge and argon spectrum detection system formed by high-voltage pulse generating device

Abstract

The invention discloses a high-voltage pulse generation device for glow discharge and an argon spectrum detection system formed by the high-voltage pulse generation device, the device comprises a rectification module, an inversion module and a pulse shaping module which are electrically connected in sequence, the rectification module is used for receiving input voltage and converting the input voltage into direct-current voltage with smooth output; the inversion module is used for processing the mainstream voltage and converting the mainstream voltage into high-frequency alternating-current voltage; the pulse shaping module is used for processing the high-frequency alternating-current voltage, so that sine waves of the high-frequency alternating-current voltage are switched into narrow pulse signals with expected parameters; through cooperation of the rectification module, the inversion module and the pulse shaping module, the voltage is increased to an adjustable range of 2-10 KV, the pulse shaping module ensures that the output current can be adjusted in a range of 5-10 mA, and accurate adjustment can be performed by controlling the output voltage and current according to factors such as the thickness and the material of glass, so that the optimal argon ionization effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of argon gas detection, and more particularly to a high-voltage pulse generator for glow discharge and an argon gas spectral detection system composed thereof. Background Technology

[0002] Argon, as an inert gas, has wide applications in industry. In the manufacture of insulated glass units, argon is needed to fill the cavity formed by the two glass panels. Argon is an inert gas with very stable chemical properties. It is colorless and odorless, does not react chemically with other substances at room temperature, is neither flammable nor combustion-supporting, and has very high safety. Therefore, filling insulated glass units with argon has positive effects on heat insulation, ultraviolet filtration, preventing fogging, reducing the probability of spontaneous breakage, sound insulation, structural integrity, and extending product lifespan. However, if the argon concentration is not as expected, the quality of the insulated glass will decrease. Therefore, measuring the argon parameters of insulated glass is necessary. In actual production, due to the lack of effective testing equipment, the amount of argon filled in the insulated glass is often determined by estimation. This estimation method has a large margin of error and cannot accurately determine the actual argon concentration inside the insulated glass, thus affecting the quality control and performance evaluation of the insulated glass. For example, in buildings with extremely high requirements for thermal insulation, inaccurate argon concentration in the insulated glass may lead to substandard insulation performance and increased building energy consumption. In another practical production scenario, argon detection instruments from Sparklike are used for testing, but these instruments are expensive, and their probe's ionization voltage is fixed at 5KV, which cannot be effectively adjusted to suit insulated glass of different thicknesses and materials, thus failing to achieve optimal argon ionization. Therefore, a more reasonable voltage generating device is urgently needed to address the aforementioned shortcomings and drawbacks. Summary of the Invention

[0003] To address the problems of high cost and incompatible adjustment techniques for probe ionization voltage in existing argon gas detection instruments, this invention provides a solution.

[0004] To achieve the above objectives, the present invention provides a high-voltage pulse generator for glow discharge, comprising a rectifier module, an inverter module, and a pulse shaping module connected in sequence, wherein:

[0005] The rectifier module is used to receive the input voltage and convert the input voltage into a smooth DC output voltage.

[0006] The inverter module is used to process the mainstream voltage to convert it into a high-frequency AC voltage, the voltage range of which is 2-10kV;

[0007] The pulse shaping module is used to process the high-frequency AC voltage so that the sine wave of the high-frequency AC voltage is switched into a narrow pulse signal with expected parameters.

[0008] As an improvement of the present invention, the rectifier module includes a bridge rectifier circuit and an electrolytic capacitor. The input terminal of the bridge rectifier circuit is used to receive the input voltage, and the output terminal is coupled to the input terminal of the electrolytic capacitor.

[0009] As an improvement of the present invention, the inverter module includes a driver chip, a full-bridge topology circuit and a transformer. The transformer is electrically connected to the driver chip, and its input terminal is used to receive the DC voltage, while its output terminal is coupled to the input coil of the transformer.

[0010] As an improvement of the present invention, the pulse shaping module includes a coupled limiting circuit and an RC differentiating circuit; the high-frequency AC voltage is noise-processed by the limiting circuit and then switched into the pulse signal with the expected parameters by the RC differentiating circuit.

[0011] As an improvement of the present invention, the pulse shaping module further includes a network resistor unit and a current transformer. The network resistor unit is used to determine that the consistency of the pulse voltage of the multiple outputs is ≥95%. The current transformer is used to collect the output current signal in real time, compare it with the set value, and then adjust the full-bridge topology circuit through the driver chip to achieve current stability ≤±2%.

[0012] This application also provides an argon gas spectral detection system, including:

[0013] Any of the aforementioned high-voltage pulse generating devices;

[0014] An optical probe is electrically connected to a high-voltage pulse generator; the high-voltage pulse generator operates to generate an excitation field strength in the optical probe, thereby ionizing argon gas to induce glow discharge, the field strength of the excitation electric field being ≥10^4 V / cm; the optical probe is also used to collect the spectral signal generated by the glow discharge.

[0015] The processing and analysis module calculates the concentration value of the argon gas based on the acquired spectral signal.

[0016] As an improvement of the present invention, the optical probe includes:

[0017] An excitation tungsten needle is used to receive the output of the generating device to generate excitation energy;

[0018] The collecting optical fiber is provided in multiple sets and arranged around the excitation tungsten needle to form a detection area, which completely covers the glow area.

[0019] An optical filter is located between the glow region and the detection region.

[0020] As an improvement of the present invention, the calculation steps of the processing and analysis module include:

[0021] Spectral data acquisition; acquiring the glow discharge spectrum of argon atoms to generate peak data maps of wavelength-intensity distribution;

[0022] Peak calibration: After performing local maximum search on the peak data graph to calibrate the expected argon atom peak shape, function fitting is performed on all calibrated peak shapes to obtain the measured peak intensity value;

[0023] Inversion calculation:

[0024] A mathematical relationship between argon concentration and characteristic peak intensity was established through standard gas verification experiments:

[0025] Insulating glass standard samples with concentration gradients of 10%, 30%, 50%, 70%, and 90% were prepared.

[0026] The peak intensity values ​​of the target band spectral lines at the concentration of the standard sample were collected, and a quadratic polynomial regression equation was obtained by fitting the data.

[0027] The concentration of argon gas is calculated by substituting the measured peak intensity value into a quadratic polynomial regression equation.

[0028] As an improvement of the present invention, it further includes a communication processing module electrically connected to the processing and analysis module, the communication processing module being used to communicate with external functional modules.

[0029] As an improvement of the present invention, the external functional module is a central memory module, and the communication modules of the multiple argon gas spectral detection systems are all connected to the central memory module, which stores the data of the multiple argon gas spectral detection systems.

[0030] The beneficial effects of this invention are as follows: Compared with the prior art, this invention provides a high-voltage pulse generator for glow discharge and an argon gas spectral detection system constituted therewith. The high-voltage pulse generator includes a rectifier module, an inverter module, and a pulse shaping module connected in sequence. The rectifier module receives the input voltage and converts it into a smooth DC output voltage. The inverter module processes the mains voltage to convert it into a high-frequency AC voltage, the voltage range of which is 2-10kV. The pulse shaping module processes the high-frequency AC voltage. This allows the sinusoidal wave of high-frequency AC voltage to be switched into a narrow pulse signal with the desired parameters. Through the coordinated operation of the rectifier module, inverter module, and pulse shaping module, the voltage can be boosted to an adjustable range of 2-10KV. The pulse shaping module ensures that the output current is adjustable from 5-10mA and has a uniformity of ≥95%. This uniform and stable electrical output can stably ionize argon gas into glow discharge, thereby ensuring the reliability of the transmitted spectrum. Furthermore, the output voltage and current can be precisely adjusted according to factors such as the thickness and material of the glass to achieve the best argon ionization effect. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the generating device frame of the present invention;

[0032] Figure 2 This is a system framework diagram of the present invention;

[0033] Figure 3 This is a circuit diagram of the generating device of the present invention. Detailed Implementation

[0034] To more clearly illustrate the present invention, the invention will be further described below with reference to the accompanying drawings.

[0035] In the following description, specific examples are given to provide a more in-depth understanding of the invention. It is obvious that the described embodiments are merely some, not all, of the embodiments of the invention. It should be understood that the specific embodiments described are for illustrative purposes only and are not intended to limit the scope of the invention.

[0036] It should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the said feature, integral, step, operation, element, or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, or combinations thereof.

[0037] To address the aforementioned technical problems, this application provides a high-voltage pulse generator for glow discharge. Please refer to the appendix. Figure 1 To be continued Figure 3 It includes a rectifier module, an inverter module, and a pulse shaping module connected in sequence, wherein:

[0038] The rectifier module is used to receive the input voltage and convert it into a smooth DC output voltage;

[0039] The inverter module is used to process the mainstream voltage to convert it into a high-frequency AC voltage, with a voltage range of 2-10kV.

[0040] The pulse shaping module is used to process high-frequency AC voltage so that the sine wave of the high-frequency AC voltage is switched into a narrow pulse signal with the expected parameters.

[0041] In this embodiment, the rectifier module, inverter module, and pulse shaping module work together to achieve an adjustable voltage range of 2-10KV. The pulse shaping module ensures that the output current is adjustable from 5-10mA and has a uniformity of ≥95%. This uniform and stable electrical output can stably ionize argon gas into glow discharge, thereby ensuring the reliability of the transmitted spectrum. Furthermore, the output voltage and current can be precisely adjusted according to factors such as the thickness and material of the glass to achieve the best argon gas ionization effect.

[0042] In this embodiment, the rectifier module includes a bridge rectifier circuit and an electrolytic capacitor C1. The input terminal of the bridge rectifier circuit is used to receive the input voltage, and the output terminal is coupled to the input terminal of the electrolytic capacitor C1. The bridge rectifier circuit converts AC power into pulsating DC power, which is then filtered by the electrolytic capacitor C1 (e.g., a 470μF / 400V capacitor) to output a smooth DC voltage (approximately 300V). This design provides a stable DC energy base for subsequent processing steps. The input voltage can be either AC 220V / 50Hz mains power or DC 13-24V battery module (suitable for portable applications).

[0043] In this embodiment, the inverter module includes a driver chip, a full-bridge topology circuit, and a transformer T1. The transformer T1 is electrically connected to the driver chip, and its input terminal is used to receive DC voltage, while its output terminal is coupled to the input coil of the transformer T1. The driver chip is a UC3845, and the full-bridge topology circuit consists of four IGBT power transistors (i.e., attached). Figure 3The inverter unit (Q1, Q2, Q3, and W4) uses IGBT power transistors, such as the FGA25N120. The driver chip controls the switching sequence of the IGBT power transistors via PWM (Pulse Width Modulation) signals, converting DC voltage into high-frequency AC voltage. Transformer T1 is a ferrite core transformer with an input coil to output coil turns ratio of 1:1000-5000. Through the principle of electromagnetic induction, the high-frequency AC voltage is boosted by transformer T1, resulting in a peak output AC voltage of 2-10KV at the output coil. It is evident that the inverter unit, driver chip, and transformer T1 work together to effectively adjust the output voltage amplitude in real time by regulating the PWM signal duty cycle. This voltage amplitude can be effectively controlled within a predetermined range to accommodate hollow glass samples of varying thicknesses. For example, at a duty cycle of 50%, the output is 5KV, and at a duty cycle of 80%, the output is 8KV.

[0044] In this embodiment, the pulse shaping module includes a coupled limiting circuit and an RC differentiating circuit. After noise processing by the limiting circuit, the high-frequency AC voltage is then switched into a pulse signal with the expected parameters by the RC differentiating circuit. The limiting circuit is composed of a TVS diode D1 of model SMBJ15KA, and the RC differentiating circuit is composed of a resistor R1 = 10kΩ and a capacitor C2 = 10nF, so that the output pulse width can be controlled within the range of 10-100μs and the repetition frequency is adjustable from 1-100Hz.

[0045] In this embodiment, the pulse shaping module further includes a network resistor unit and a current transformer. The network resistor unit is used to ensure that the consistency of the pulse voltage of the multiple outputs is ≥95%. The current transformer is used to collect the output current signal in real time, compare it with the set value, and then adjust the full-bridge topology circuit through the driver chip to achieve current stability ≤±2%. The network resistor unit Rx is composed of 10 100MΩ high-voltage resistors connected in series by the resistor network voltage equalization method to ensure that the consistency of the multiple output pulse voltages is ≥95%. The output current signal is collected in real time by the current transformer (such as TA100-1 type), compared with the set value (5-10mA), and then the PID controller automatically adjusts the drive signal of the IGBT power transistor in the full-bridge topology to achieve current stability ≤±2%.

[0046] This application also provides an argon gas spectral detection system, including:

[0047] Any of the aforementioned high-voltage pulse generating devices;

[0048] An optical probe is electrically connected to a high-voltage pulse generator. The high-voltage pulse generator operates to generate an excitation field strength in the optical probe, which in turn ionizes argon gas to induce glow discharge. The field strength of the excitation electric field is ≥10^4 V / cm. The optical probe is also used to collect the spectral signal generated by the glow discharge.

[0049] The processing and analysis module calculates the argon concentration value based on the acquired spectral signals;

[0050] As can be seen, by using the generating device in the aforementioned embodiment to effectively output the expected adjustable voltage, the field strength of the excited battery can overcome the actual thickness and material of the insulating glass and be maintained at 10^4 V / cm, so as to achieve the best ionization effect and be effectively monitored, thus ensuring the accuracy of detection.

[0051] In this embodiment, the optical probe includes:

[0052] The excitation tungsten needle is used to receive the output of the generator to produce excitation energy; the specific parameters of the excitation tungsten needle are a 1.8mm diameter scheelite needle tip;

[0053] The collection fiber has multiple sets, which are arranged around the excitation tungsten needle to form a detection area, which completely covers the glow area; the mobile phone fiber is specifically a quartz fiber array with a diameter of 1000μm arranged in 7 parallel bundles.

[0054] An optical filter is located between the glow region and the detection region; the filter has a center wavelength of 763.5 nm and a half-width of 10 nm, which can effectively eliminate the fluorescence of the glass matrix and ambient scattering, and only allow the spectral lines characteristic of argon gas to pass through;

[0055] By using a combination of tungsten needles, optical fibers, and optical filters, argon gas in insulating glass can be excited and data collected efficiently, providing a suitable data foundation for subsequent processing modules.

[0056] In this embodiment, the calculation steps of the processing and analysis module include:

[0057] Spectral data acquisition; acquiring the glow spectrum of argon atoms to generate peak data map of wavelength-intensity distribution; in the specific scheme, spectral data is acquired at a rate of 50ms / frame using a linear CCD detector, with each frame containing 2048 wavelength points (resolution 0.5nm), covering the main characteristic spectral lines of argon at 763.5nm, 772.4nm, and 811.6nm, which are the main emission bands of argon;

[0058] Peak calibration: After performing local maximum search on the peak data graph to calibrate the expected argon atom peak shape, function fitting is performed on all calibrated peak shapes to obtain the measured peak intensity value. In the specific scheme, after local magnification, Savitzky-Golay smoothing filtering is performed on the spectral data with parameters such as a window width of 9 points, a polynomial order of 2, and a threshold setting such as the mean of background noise + 3 times the standard deviation. Spectral peaks higher than the threshold are selected, thus obtaining the expected argon atom peaks. Subsequently, Gaussian function fitting is performed on each peak to determine the peak wavelength, such as an accuracy of ±0.2nm and peak intensity unit of ADU. After analog-to-digital conversion and counting, the peak intensity value can be obtained.

[0059] Inversion calculation:

[0060] A mathematical relationship between argon concentration and characteristic peak intensity was established through standard gas verification experiments, thereby obtaining the calibration curve.

[0061] Standard samples of insulating glass with argon-air concentration gradients of 0-100% were prepared, with gradients of 5% for the 0-90% stage and 1% for the 90-100% gradient. This concentration gradient allows for the acquisition of a standard curve that fits the production environment, enabling a clearer assessment of actual argon parameters.

[0062] The peak intensity values ​​of the target band spectral lines at standard sample concentrations were collected, and a quadratic polynomial regression equation was obtained by fitting the data.

[0063] The concentration of argon gas is calculated by substituting the measured peak intensity value into the quadratic polynomial regression equation.

[0064] As can be seen, during detection, the argon concentration value is calculated by substituting the measured peak intensity value into the equation. This calculation method greatly saves detection time, and the time for a single calculation can be controlled within 10ms, achieving rapid results.

[0065] This embodiment also includes a communication processing module electrically connected to the processing and analysis module. This communication processing module communicates with external functional modules. It's easy to understand that the communication processing module enables data interaction with external functional modules. For example, if the external functional module is a printing module, after data exchange and transmission, the printing module generates a report of the test results and prints it out. Technicians can quickly obtain relevant parameter information such as concentration values, detection time, and equipment number. In a more preferred embodiment, the external functional module is a central memory module. The communication modules of multiple argon gas spectroscopy detection systems are all connected to the central memory module, which stores the data from multiple argon gas spectroscopy detection systems. This module can achieve wireless connection with external devices, such as connecting to the printing module to directly print out the detected argon concentration data for easy recording and archiving by staff. Simultaneously, it can also connect to the memory module to upload data for storage, facilitating subsequent data aggregation, analysis, and export. This allows the data to play a greater role, such as for quality traceability in the production process and long-term monitoring of product performance. For example, in a large insulating glass manufacturing plant, the communication processing module can simultaneously upload data from multiple argon gas spectral detection systems to the memory module. Plant managers can use data analysis software to comprehensively analyze the argon gas concentration data of insulating glass from different batches and production lines, promptly identify problems in the production process, and make adjustments. The communication processing module uses one of Bluetooth, Zigbe, or Wi-Fi connection modes.

[0066] In a preferred embodiment, a display module, which is an LCD display component, is also included to display the spectral graph in real time and show the relevant equipment status parameters and measurement data.

[0067] Comparison with existing technologies

[0068] Comparison items The argon gas spectral detection system of the present invention Sparklike similar devices Voltage adjustment range 2-10KV continuously adjustable Fixed 5KV Current stability ≤±2％ ±5％-8％ Pulse uniformity ≥95％ Approximately 85% Control method Digital PID closed-loop control Analog potentiometer adjustment Security Protection Multi-stage overvoltage / overcurrent protection Single fuse protection

[0069] Performance indicators The argon gas spectral detection system of the present invention Sparklike similar devices Detection time <5s / time 10-15 seconds / time Concentration resolution 0.1％ 1％ Temperature adaptability -10℃~50℃ (automatic compensation) 5℃~35℃ (manual calibration required) Data traceability Raw spectrum + processing log full storage Store only concentration values Multi-device collaboration Supports Bluetooth networking (≤10 units) Standalone operation

[0070] Through the deep collaborative design of optics, algorithms, and communication processing described above, this system achieves full automation from glow excitation to concentration output, and has significant improvements in detection efficiency, accuracy, and data management capabilities compared to existing technologies.

[0071] The advantages of this invention are:

[0072] As can be seen, by using the generating device in the aforementioned embodiment to effectively output the expected adjustable voltage, the field strength of the excited battery can overcome the actual thickness and material of the insulating glass and remain at 10^4 V / cm, so as to achieve the best ionization effect and thus be effectively monitored, ensuring the accuracy of detection.

[0073] The communication processing module enables data interaction with external functional modules, allowing technicians to quickly monitor and collect data and adjust production strategies in real time based on the data.

[0074] The above-disclosed embodiments are merely a few specific examples of the present invention, but the present invention is not limited thereto. Any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A high-voltage pulse generator for glow discharge, characterized in that, It includes a rectifier module, an inverter module, and a pulse shaping module that are connected in sequence, wherein: The rectifier module is used to receive the input voltage and convert the input voltage into a smooth DC output voltage. The inverter module is used to process the mainstream voltage to convert it into a high-frequency AC voltage, the voltage range of which is 2-10kV; The pulse shaping module is used to process the high-frequency AC voltage so that the sine wave of the high-frequency AC voltage is switched into a narrow pulse signal with expected parameters, so as to form an output current of 5-10mA.

2. The high-voltage pulse generator for glow discharge according to claim 1, characterized in that, The rectifier module includes a bridge rectifier circuit and an electrolytic capacitor. The input terminal of the bridge rectifier circuit is used to receive the input voltage, and the output terminal is coupled to the input terminal of the electrolytic capacitor.

3. The high-voltage pulse generator for glow discharge according to claim 1, characterized in that, The inverter module includes a driver chip, a full-bridge topology circuit, and a transformer. The transformer is electrically connected to the driver chip, and its input terminal is used to receive the DC voltage, while its output terminal is coupled to the input coil of the transformer.

4. The high-voltage pulse generator for glow discharge according to claim 1, characterized in that, The pulse shaping module includes a coupled limiting circuit and an RC differentiating circuit; the high-frequency AC voltage is noise-processed by the limiting circuit and then switched into the pulse signal with the expected parameters by the RC differentiating circuit.

5. A high-voltage pulse generator for glow discharge according to claim 4, characterized in that, The pulse shaping module also includes a network resistor unit and a current transformer. The network resistor unit is used to ensure that the consistency of the pulse voltage of the multiple outputs is ≥95%. The current transformer is used to collect the output current signal in real time, compare it with the set value, and then adjust the full-bridge topology circuit through the driver chip to achieve current stability ≤±2%.

6. An argon gas spectral detection system, characterized in that, include: The high-voltage pulse generator according to any one of claims 1-5; An optical probe, which is electrically connected to the high-voltage pulse generator; The high-voltage pulse generator operates to generate an excitation field strength in the optical probe, thereby ionizing argon gas to induce glow discharge. The field strength of the excitation electric field is ≥10^4 V / cm. The optical probe is also used to collect the spectral signal generated by the glow discharge. The processing and analysis module calculates the concentration value of the argon gas based on the acquired spectral signal.

7. The argon gas spectral detection system according to claim 6, characterized in that, The optical probe includes: An excitation tungsten needle is used to receive the output of the generating device to generate excitation energy; The collecting optical fiber is provided in multiple sets and arranged around the excitation tungsten needle to form a detection area, which completely covers the glow area. An optical filter is located between the glow region and the detection region.

8. The argon gas spectral detection system according to claim 6, characterized in that, The calculation steps of the processing and analysis module include: Spectral data acquisition; acquiring the glow discharge spectrum of argon atoms to generate peak data maps of wavelength-intensity distribution; Peak calibration: After performing local maximum search on the peak data graph to calibrate the expected argon atom peak shape, function fitting is performed on all calibrated peak shapes to obtain the measured peak intensity value; Inversion calculation: A mathematical relationship between argon concentration and characteristic peak intensity was established through standard gas verification experiments: Insulating glass standard samples with argon-air concentration gradients of 0-100% were prepared. The gradients were set at 5% for the 0-90% stage and 1% for the 90-100% stage. The peak intensity values ​​of the target band spectral lines at the concentration of the standard sample were collected, and a quadratic polynomial regression equation was obtained by fitting the data. The concentration of argon gas is calculated by substituting the measured peak intensity value into a quadratic polynomial regression equation.

9. The argon gas spectral detection system according to claim 6, characterized in that, It also includes a communication processing module electrically connected to the processing and analysis module, which is used to communicate with external functional modules.

10. The argon gas spectral detection system according to claim 9, characterized in that, The external functional module is a central memory module. The communication modules of multiple argon gas spectroscopy detection systems are all connected to the central memory module, which stores the data of multiple argon gas spectroscopy detection systems.

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