Arc discharge light source

Abstract

The present invention discloses an arc discharge light source, comprising: a power supply circuit and an excitation source circuit, wherein the power supply circuit is used to provide electrical energy to the excitation source circuit; the excitation source circuit includes a high-voltage circuit and a power circuit, wherein the high-voltage circuit includes a high-voltage sub-circuit and an auxiliary gap, wherein the high-voltage sub-circuit is used to break down the auxiliary gap according to the electrical energy provided by the power supply circuit, and the high-voltage circuit and the power circuit act on a sample to be tested to ionize and analyze the sample to be tested. By implementing the present invention, a high-voltage circuit and a power circuit are provided, wherein the high-voltage circuit provides a breakdown high voltage, and the power circuit forms an energy circuit, wherein the power circuit and the high-voltage circuit act together on the sample to be tested to ionize and analyze the sample to be tested. At the same time, an auxiliary gap is provided in the high-voltage circuit for secondary voltage boosting, thereby assisting in completing the arc ignition work of the arc discharge light source. As a result, the arc discharge light source can be used in various spectrometers, sensors, or measuring instruments to provide them with a stable power supply, thereby improving the stability of the various instruments in use.

Description

Technical Field

[0001] The present invention relates to the technical field of arc discharge, and in particular to an arc discharge light source. Background Art

[0002] Arc discharge is a phenomenon in which two electrodes, under a certain voltage, maintain electrical conductivity due to gaseous charged particles, such as electrons or ions. It is the strongest self-sustaining type of gas discharge. Arc discharge can excite a sample to produce a spectrum. For example, arc discharge primarily emits atomic spectral lines and is a commonly used excitation light source in emission spectroscopy. Oil spectrometers can utilize arc discharge excitation light sources. However, prior research on arc discharge excitation light sources for oil spectrometers is limited, and excitation light sources used in other fields are also unsuitable for direct application in oil spectrometers. Summary of the Invention

[0003] In view of this, an embodiment of the present invention provides an arc discharge light source to solve the technical problem that there is little research on arc discharge light sources used in oil spectrometers in the prior art.

[0004] The technical solutions proposed by the present invention are as follows:

[0005] An embodiment of the present invention provides an arc discharge light source, comprising: a power supply circuit and an excitation source circuit, wherein the power supply circuit is connected to the excitation source circuit and is used to provide electrical energy to the excitation source circuit; the excitation source circuit comprises a high-voltage circuit and a power circuit, wherein the high-voltage circuit comprises a high-voltage sub-circuit and an auxiliary gap, wherein the high-voltage sub-circuit is used to break down the auxiliary gap according to the electrical energy provided by the power supply circuit, and the high-voltage circuit and the power circuit act on a sample to be tested to ionize and analyze the sample to be tested.

[0006] Optionally, the excitation source circuit further includes: an auxiliary circuit, wherein the auxiliary circuit is configured to maintain conduction of the auxiliary gap according to the electric energy provided by the power supply circuit.

[0007] Optionally, the sample to be tested is set in the analysis gap, and the high-voltage sub-circuit includes: a solid-state ignition circuit, one end of which is connected to the power supply circuit, and is used to output an arc to break through the auxiliary gap and the analysis gap according to the electric energy provided by the power supply circuit.

[0008] Optionally, the high-voltage sub-circuit also includes: a first capacitor and a first resistor, one end of the first capacitor is connected to the other end of the solid-state ignition circuit, the other end of the first capacitor is connected to one end of the first resistor, and the other end of the first resistor is connected to the auxiliary gap; the first capacitor is used to stabilize the frequency of the arc output by the solid-state ignition circuit, and the first resistor is used to limit the current output by the high-voltage sub-circuit.

[0009] Optionally, the power circuit includes: a second resistor, a second capacitor, a third resistor and an inductor, one end of the second resistor is connected to the power supply circuit, the other end of the second resistor is connected to one end of the second capacitor, the other end of the second capacitor is connected to one end of the third resistor, and the other end of the third resistor is connected to the inductor.

[0010] Optionally, the auxiliary circuit includes: a fan, the fan is connected to the power circuit, and the fan blows toward the auxiliary gap according to the electric energy provided by the power circuit to maintain the conduction of the auxiliary gap.

[0011] Optionally, the auxiliary circuit also includes: a rectifier circuit, a fourth resistor and a third capacitor. The fan is connected to the power supply circuit through the rectifier circuit, the fourth resistor and the third capacitor. One end of the rectifier circuit is connected to the power supply circuit, the other end of the rectifier circuit is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to one end of the third capacitor and the fan, and the other end of the third capacitor is connected to the fan.

[0012] Optionally, the arc discharge light source further comprises: an excitation table, the analysis gap is arranged on the excitation table, the analysis gap comprises a disk electrode and a rod electrode, one end of the rod electrode is connected to the auxiliary gap, the excitation table comprises a disk electrode motor, the disk electrode motor is connected to the power supply circuit, and is used to drive the disk electrode to rotate according to the electric energy provided by the power supply circuit to ionize the sample to be measured in the analysis gap.

[0013] Optionally, the excitation table further includes: a transmitting induction probe and a receiving induction probe, which are respectively arranged at both ends of the analysis gap to detect whether the rod electrode and the disk electrode are placed, the distance of the analysis gap, and the position where the sample to be tested is placed.

[0014] Optionally, the excitation platform further includes: a fixing frame and a protective cover, the fixing frame is used to fix the transmitting sensing probe and the receiving sensing probe, and the protective cover is used to shield the transmitting sensing probe and the receiving sensing probe.

[0015] The technical solution of the present invention has the following advantages:

[0016] The arc discharge light source provided by the embodiment of the present invention is provided with a power supply circuit and an excitation source power supply. The power supply circuit can provide electrical energy for the excitation source. A high-voltage circuit and a power circuit are provided in the excitation source circuit. The high-voltage circuit provides a breakdown high voltage. The power circuit forms an energy circuit. The power circuit and the high-voltage circuit act together on the sample to be tested to ionize and analyze the sample to be tested. At the same time, an auxiliary gap is provided in the high-voltage circuit for secondary boosting to assist in completing the arc striking work of the arc discharge light source. Therefore, the arc discharge light source provided by the embodiment of the present invention can be used in various spectrometers, sensors or measuring instruments to provide a stable power supply therefor, thereby improving the stability of use of various instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific 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.

[0018] Figure 1 This is a structural block diagram of an arc discharge light source in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of an arc discharge light source in an embodiment of the present invention;

[0020] Figure 3 This is a structural block diagram of an arc discharge light source in another embodiment of the present invention;

[0021] Figure 4 2 is a schematic diagram of the structural principle of the excitation platform in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components; wireless connections or wired connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Example 1

[0027] The present invention discloses an arc discharge light source, such as Figure 1 As shown, the arc discharge light source includes: a power supply circuit 1 and an excitation source circuit 2, the power supply circuit 1 is connected to the excitation source circuit 2, and is used to provide electrical energy to the excitation source circuit 2; the excitation source circuit 2 includes a high-voltage circuit and a power circuit 22, the high-voltage circuit includes a high-voltage sub-circuit 21 and an auxiliary gap 23, the high-voltage sub-circuit 21 is used to break down the auxiliary gap 23 according to the electrical energy provided by the power supply circuit 1, and the high-voltage circuit and the power circuit 22 act on the sample to be tested to ionize and analyze the sample to be tested. Optionally, the arc discharge light source can be used in an oil spectrometer as a power source for the oil spectrometer. In this case, the sample to be tested is an oil sample. At the same time, the arc discharge light source can also be used in other spectroscopic instruments, such as AC / DC arc direct-reading spectrometers, spectrographs, etc. In addition, the arc discharge light source can also be applied to fields such as image sensing and other non-contact measurements.

[0028] In one embodiment, if Figure 2As shown, the power supply circuit 1 can receive external input mains power, for example, receiving 220V, 50Hz mains power input from the power grid. A transformer, a filter 11 and a terminal block 12 are provided in the power supply circuit 1. The transformer converts the external input mains power into 125V, 50Hz alternating current. The 125V alternating current passes through the filter 11 and is divided into multiple paths by the terminal block 12 and sent to the high-voltage circuit and the power circuit 22 respectively.

[0029] The high-voltage circuit, based on the electrical energy provided by the power supply circuit 1, breaks down the auxiliary gap 23, while also providing an analytical potential for the sample to be tested. After the auxiliary gap 23 is broken down, it can achieve a secondary voltage boost, achieving the arc ignition or discharge required for the initial stage of the sample to be tested. In one specific embodiment, the auxiliary gap 23 is formed by two tungsten rods aligned horizontally with a gap of approximately 4 cm between them. The power circuit 22, also known as the energy circuit, acts together with the high-voltage circuit on the sample to ionize and analyze it.

[0030] The arc discharge light source provided by the embodiment of the present invention is provided with a power supply circuit and an excitation source power supply. The power supply circuit can provide electrical energy for the excitation source. A high-voltage circuit and a power circuit are provided in the excitation source circuit. The high-voltage circuit provides a breakdown high voltage. The power circuit forms an energy circuit. The power circuit and the high-voltage circuit act together on the sample to be tested to ionize and analyze the sample to be tested. At the same time, an auxiliary gap is provided in the high-voltage circuit for secondary boosting to assist in completing the arc striking work of the arc discharge light source. Therefore, the arc discharge light source provided by the embodiment of the present invention can be used in various spectrometers, sensors or measuring instruments to provide a stable power supply therefor, thereby improving the stability of use of various instruments.

[0031] In one embodiment, if Figure 3 As shown, the excitation source circuit 2 further includes an auxiliary circuit 24, which is used to maintain the conduction of the auxiliary gap 23 according to the power provided by the power supply circuit 1. Figure 2 As shown, the auxiliary circuit 24 includes: a rectifier circuit 31, a fourth resistor 32, a third capacitor 33 and a fan 34, one end of the rectifier circuit 31 is connected to the power supply circuit 1, the other end of the rectifier circuit 31 is connected to one end of the fourth resistor 32, the other end of the fourth resistor 32 is connected to one end of the third capacitor 33 and the fan 34, and the other end of the third capacitor 33 is connected to the fan 34.

[0032] Among them, the rectifier circuit 31 selects a bridge rectifier BR64, and the rectifier circuit 31 rectifies the 125V AC power input by the power supply circuit 1 into DC power. The fourth resistor 32 selects a resistor with a resistance of 1000Ω to 2000Ω, for example, it can be 1500Ω. The function of the fourth resistor 32 is to divide the voltage, or it is called a step-down resistor; the third capacitor 33 is used to filter out clutter and stabilize the DC voltage. The third capacitor 33 can select a filter capacitor, and the capacitance value of the third capacitor 33 selects a capacitor of 400μF to 800μF, for example, it can be 560μF.

[0033] Specifically, the DC voltage of appropriate magnitude output by the rectifier circuit 31, the fourth resistor 32, and the third capacitor 33 powers the fan 34, which rotates and blows toward the auxiliary gap 23. During excitation, the air in the auxiliary gap 23 breaks down, forming non-conductive ozone molecules and other ions. Without the use of the fan 34, the gap will soon be filled with non-conductive ozone molecules and other ions, and the excitation will stop. The fan blows the air into circulation, ensuring that there is always air in the gap so that the excitation can be stable and continuous. Among them, the fan blowing toward the auxiliary gap can maintain the breakdown of the auxiliary gap 23 and complete the arc ignition work of the arc discharge light source. Once the arc is successfully ignited, the auxiliary gap 23 can stop working and start again when an arc is broken or there is no spark.

[0034] In one embodiment, the sample to be tested is placed in the analysis gap, such as Figure 2 As shown, the high-voltage sub-circuit 21 includes a solid-state ignition circuit 201, one end of which is connected to the power supply circuit 1 and is used to output an arc breakdown auxiliary gap 23 and an analysis gap based on the electrical energy provided by the power supply circuit 1. The high-voltage sub-circuit 21 also includes a first capacitor 202 and a first resistor 203, one end of the first capacitor 202 being connected to the other end of the solid-state ignition circuit 201, the other end of the first capacitor 202 being connected to one end of the first resistor 203, and the other end of the first resistor 203 being connected to the auxiliary gap 23. The first capacitor 202 is used to stabilize the frequency of the arc output by the solid-state ignition circuit 201, and the first resistor 203 is used to limit the current output by the high-voltage sub-circuit.

[0035] In one specific embodiment, the solid-state ignition circuit 201 receives 125V, 50Hz AC input and outputs a high voltage of 12kV at a frequency of 1kHz. The LMC555CN chip in the solid-state ignition circuit 201 generates a constant-frequency pulse signal, thereby maintaining the arc at an appropriate frequency. The high voltage output of the solid-state ignition circuit 201 performs two functions: first, providing a high voltage potential to break down the air and the sample (e.g., oil sample) in the analysis gap; second, providing an analytical potential to instantly vaporize the oil sample and any particles suspended in the oil medium.

[0036] In a specific embodiment, first capacitor 202 is a high-voltage capacitor, which can be a 500pF, 30kVdc high-voltage capacitor. It stabilizes the frequency of the oscillating arc in conjunction with solid-state ignition circuit 201. First resistor 203 is a 25Ω, 25W, 5% non-inductive resistor connected in series between first capacitor 202 and auxiliary gap 23 to limit the current of the high-voltage ignition discharge.

[0037] In one embodiment, if Figure 2 As shown, the power circuit 22 includes: a second resistor 212, a second capacitor 213, a third resistor 214, and an inductor 215. One end of the second resistor 212 is connected to the power circuit 1, the other end of the second resistor 212 is connected to one end of the second capacitor 213, the other end of the second capacitor 213 is connected to one end of the third resistor 214, and the other end of the third resistor 214 is connected to the inductor 215. In a specific embodiment, the second resistor 212 is a 25Ω, 50W, 1% power resistor, the second capacitor 213 is a 10μF resistor, the third resistor 214 is a 5Ω, 50W, 1% power resistor, and the inductor 215 is 82μH.

[0038] Specifically, second resistor 212 functions as a voltage divider; second capacitor 213 is a storage capacitor for storing electrical energy. The peak value of the sine wave in second capacitor 213 is charged and discharged approximately six times, with the accumulated charge on the capacitor being released to the analysis gap via third resistor 214. Third resistor 214 and second capacitor 213 together form the R / C time constant of the analysis waveform discharge characteristics. Inductor 215, a passive component consisting of 16 wires wound around an isolation spacer, provides high-voltage isolation for the analysis gap. It isolates the high-voltage circuit from the analysis portion by blocking the electromagnetic field generated by the high-voltage discharge.

[0039] In one embodiment, if Figure 2 As shown, the arc discharge light source further includes: an excitation platform 3, an analysis gap 301 is arranged on the excitation platform, the analysis gap 301 includes a disk electrode 302 and a rod electrode 303, one end of the rod electrode 303 is connected to the auxiliary gap 23, the excitation platform 3 includes a disk electrode motor 304, the disk electrode motor 304 is connected to the power supply circuit 1, and is used to drive the disk electrode 302 to rotate according to the power provided by the power supply circuit 1, so as to ionize the sample to be tested in the analysis gap 301. Specifically, as Figure 4As shown, the excitation platform 3 can be provided with a fixed platform 41 at the bottom, and the disk electrode 302 and the rod electrode 303 are both provided on the fixed platform 41. The rod electrode 303 is composed of a carbon rod. The rod electrode 303 and the disk electrode 302 serve as two electrodes during excitation. The rod electrode 303 generates high voltage during excitation by connecting to the high-voltage circuit and the power circuit 22. The disk electrode 302 rotates under the action of the disk electrode motor 304. An oil cup 42 is provided between the rod electrode 303 and the disk electrode 302 for placing the sample to be tested.

[0040] In one embodiment, if Figure 4 As shown, the excitation station 3 further includes: a transmitting induction probe 43 and a receiving induction probe 44, which are respectively arranged at the two ends of the analysis gap 301, and are used to detect whether the rod electrode 303 and the disk electrode 302 are placed, the distance of the analysis gap 301, and the position of the sample to be tested. Figure 4 As shown, the excitation platform 3 also includes: a fixing frame and a protective cover 45, the fixing frame includes a transmitting sensing probe fixing frame 46 and a receiving sensing probe fixing frame 47, and the protective cover 45 is used to shield the transmitting sensing probe 43 and the receiving sensing probe 44 to prevent oil from splashing onto the probe and the fixing frame during excitation.

[0041] Specifically, four transmitting inductive probes 43 and four receiving inductive probes 44 can be provided, each used to detect four signals: whether the rod electrode 303 and the disk electrode 302 are in place, the distance of the analysis gap 301, and the position of the sample to be tested. These detected signals can be transmitted to the instrument equipped with the arc discharge light source. An L-shaped mounting bracket 48 can also be provided to secure the optical fiber that collects the optical signal. The inductive probes, mounting bracket, and L-shaped mounting bracket are all mounted on a fixed platform.

[0042] Example 2

[0043] The embodiment of the present invention provides an arc discharge light source, such as Figure 2 As shown, the apparatus comprises a power supply circuit 1, an excitation source circuit 2, and an excitation stage 3. The power supply circuit 1 converts 220V, 50Hz mains electricity through a transformer into 125V, 50Hz alternating current (AC) as input power. After passing through a filter 11 and a terminal block 12, the 125V AC is split into two paths: one for the excitation source circuit 2 and the other for the disk electrode motor 304 in the excitation stage 3, which rotates the disk electrode 302 during excitation. The disk electrode 302 and rod electrode 303 on the excitation stage 3 form an analysis gap 301, in which the sample to be tested is placed.

[0044] like Figure 2As shown, the excitation source circuit 2 includes a high-voltage circuit and a power circuit. The high-voltage circuit provides breakdown high voltage, while the power circuit serves as an energy circuit. The high-voltage circuit includes a solid-state ignition circuit 201, a first capacitor (high-voltage capacitor) 202, a first resistor (current-limiting resistor) 203, and an auxiliary gap 23. The solid-state ignition circuit 201 outputs a high voltage of 12 kV and a frequency of 1 kHz from the input 125 V, 50 Hz AC power. The first capacitor (high-voltage capacitor) 202 is positioned behind the solid-state ignition circuit 201. Together with the solid-state ignition circuit 201, the first capacitor 202 stabilizes the frequency of the oscillating arc. A first resistor (current-limiting resistor) 203 is positioned behind the first capacitor 202. The first resistor 203 is connected in series between the first capacitor 202 and the auxiliary gap 23 to limit the current of the high-voltage ignition discharge. The output of the auxiliary gap 23 is connected to one end of a rod electrode 303. The power circuit includes a second resistor (variable resistor) 212, a second capacitor (analysis capacitor) 213, a third resistor (fixed value resistor) 214, and an inductor (isolation inductor) 215. The second resistor 212 and the second capacitor 213 are connected in series. The second resistor 212 is used for voltage division. The second capacitor 213 is an energy storage capacitor. The third resistor 214 and the second capacitor 213 together constitute the R / C constant for analyzing the discharge characteristics of the waveform. The inductor 215 is a passive component that isolates the high voltage from the analysis part by blocking the electromagnetic field generated by the high-voltage discharge. When powered on, the high-voltage circuit works, and the high voltage of 12KV and a frequency of 1KHz breaks down the auxiliary gap. During breakdown, the auxiliary gap is turned on and acts on the analysis gap together with the power circuit to ionize the sample to be measured in the analysis gap.

[0045] In one embodiment, if Figure 2 As shown, the excitation source circuit 2 also includes an auxiliary circuit, in which a rectifier circuit (rectifier bridge) 31, a fourth resistor (step-down resistor) 32, a third capacitor (filter capacitor) 33 and a fan 34 are provided. The rectifier circuit 31 rectifies the input 125V AC into DC, and the DC voltage is stabilized by the voltage-dropping resistor and the filter capacitor filters out the noise. This DC voltage then powers the fan 34, which rotates and blows toward the auxiliary gap. During excitation, the air in the auxiliary gap 23 breaks down, forming non-conductive ozone molecules and other ions. If the fan is not used, the gap will soon be filled with non-conductive ozone molecules and other ions, and the excitation will stop. The fan blows the air in a circular motion to ensure that there is always air in the gap, so that the excitation can proceed stably and continuously.

[0046] Although exemplary embodiments and their advantages have been described in detail, those skilled in the art may make various changes, substitutions, and modifications to these embodiments without departing from the spirit of the present invention and the scope of protection defined by the appended claims. Such modifications and variations fall within the scope defined by the appended claims. For other examples, those skilled in the art will readily appreciate that the order of the process steps may be varied while remaining within the scope of protection of the present invention.

[0047] Furthermore, the scope of application of the present invention is not limited to the processes, mechanisms, manufactures, compositions of matter, means, methods, and steps of the specific embodiments described in the specification. From the disclosure of the present invention, a person of ordinary skill in the art will readily understand that any currently existing or later developed processes, mechanisms, manufactures, compositions of matter, means, methods, or steps that perform substantially the same functions or achieve substantially the same results as the corresponding embodiments described herein may be applied in accordance with the present invention. Therefore, the claims appended hereto are intended to include within their scope such processes, mechanisms, manufactures, compositions of matter, means, methods, or steps.

Claims

1. An arc discharge light source, characterized in that: include: Power supply circuit and excitation source circuit, The power supply circuit is connected to the excitation source circuit and is used to provide electrical energy to the excitation source circuit; The excitation source circuit includes a high-voltage circuit and a power circuit. The high-voltage circuit includes a high-voltage subcircuit and an auxiliary gap. The high-voltage subcircuit is used to break down the auxiliary gap according to the electric energy provided by the power supply circuit. The high-voltage circuit and the power circuit act on the sample to be tested to ionize and analyze the sample to be tested. The excitation source circuit further includes: an auxiliary circuit, the auxiliary circuit being configured to maintain conduction of the auxiliary gap according to the electric energy provided by the power supply circuit; The sample to be tested is set in the analysis gap, and the high-voltage subcircuit includes: a solid-state ignition circuit, one end of which is connected to the power supply circuit, and is used to output an arc to break through the auxiliary gap and the analysis gap according to the electric energy provided by the power supply circuit; The high-voltage subcircuit further includes: a first capacitor and a first resistor, one end of the first capacitor is connected to the other end of the solid-state ignition circuit, the other end of the first capacitor is connected to one end of the first resistor, and the other end of the first resistor is connected to the auxiliary gap; The first capacitor is used to stabilize the frequency of the arc output by the solid-state ignition circuit, and the first resistor is used to limit the current output by the high-voltage sub-circuit; The auxiliary circuit includes a fan connected to the power circuit, and the fan blows toward the auxiliary gap according to the electric energy provided by the power circuit to maintain the conduction of the auxiliary gap.

2. The arc discharge light source according to claim 1, wherein: The power circuit includes: a second resistor, a second capacitor, a third resistor and an inductor, one end of the second resistor is connected to the power supply circuit, the other end of the second resistor is connected to one end of the second capacitor, the other end of the second capacitor is connected to one end of the third resistor, and the other end of the third resistor is connected to the inductor.

3. The arc discharge light source according to claim 1, wherein: The auxiliary circuit also includes: a rectifier circuit, a fourth resistor and a third capacitor. The fan is connected to the power supply circuit through the rectifier circuit, the fourth resistor and the third capacitor. One end of the rectifier circuit is connected to the power supply circuit, the other end of the rectifier circuit is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to one end of the third capacitor and the fan, and the other end of the third capacitor is connected to the fan.

4. The arc discharge light source according to claim 1, wherein: Also includes: The excitation table is provided with the analysis gap, the analysis gap includes a disk electrode and a rod electrode, one end of the rod electrode is connected to the auxiliary gap, the excitation table includes a disk electrode motor, and the disk electrode motor is connected to the power supply circuit and is used to drive the disk electrode to rotate according to the electric energy provided by the power supply circuit to ionize the sample to be tested in the analysis gap.

5. The arc discharge light source according to claim 4, characterized in that The excitation platform also includes: a transmitting induction probe and a receiving induction probe, which are respectively arranged at both ends of the analysis gap to detect whether the rod electrode and the disk electrode are placed, the distance of the analysis gap and the position of the sample to be tested.

6. The arc discharge light source according to claim 5, characterized in that The exciting platform further includes: a fixing frame and a protective cover, wherein the fixing frame is used to fix the transmitting sensing probe and the receiving sensing probe, and the protective cover is used to shield the transmitting sensing probe and the receiving sensing probe.

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