Device and method for measuring sensitivity of auto-darkening welding filter

Abstract

The invention provides a device and a method for measuring the sensitivity of an auto-darkening welding filter. The sensitivity measuring device comprises a trigger light source used for simulating and providing welding arc light; the environment light source simulation unit is used for simulating and providing environment light; the reflective mirror is used for reflecting the ambient light to enable the ambient light to reach the front surface of a sample, and the reflective mirror comprises a light transmitting part; when the opening and closing part is in a closed state, the light transmitting part is shielded, and the welding arc light cannot penetrate through the light transmitting part; and when the opening and closing part is in an open state, the light transmitting part is not shielded, and the welding arc light can penetrate through the light transmitting part to reach the front surface of the sample. The measuring device and the measuring method are simple, low in cost, vivid in simulation environment and accurate in test result.

Description

Technical Field

[0001] This application mainly relates to the technical field of the detection of personal protective equipment products, and particularly relates to a sensitivity measurement device and a sensitivity measurement method for an automatic dimming welding filter. Background Art

[0002] An automatic dimming welding filter (AWF) is a personal protective equipment for defending against harmful strong lights such as ultraviolet, infrared, and blue light during welding operations. It is a high-tech product integrating disciplines such as optics, electronics, and materials science, and mainly consists of components such as a control circuit, a liquid crystal light valve (LCD), a filter, a photosensitive tube, and a battery.

[0003] When an arc is generated during a welding operation, the photosensitive tube can detect the arc light instantaneously. The circuit control module amplifies and transmits the arc light signal, and quickly (generally in milliseconds) drives the LCD to work (darken) by current, so as to block the arc light and protect the human eye. The LCD working or darkening means that its shading number increases from a lower value such as 4 (corresponding to a visible light transmittance of about 5%) to a higher value such as 11 (corresponding to a visible light transmittance of about 0.005%) at a millisecond level, and can maintain the dark state shading number unchanged when there is an arc.

[0004] Generally, the AWF is powered by a battery and / or a solar cell. The control of the power supply can be automatic or manual. Figure 1 This is the side of the AWF powered by a solar cell facing the welding arc light. It includes a solar cell 111, a photosensitive tube 112, and a liquid crystal light valve 113. Figure 2 This is the side of the AWF with manual power control facing the welder, which includes a power switch 121, a dark state shading number control button 122, a sensitivity control button 123, and a liquid crystal light valve 124. When the power switch is in the on state, if there is no welding, the AWF usually stays in the light state (such as shading number 4), that is, a state with a relatively large visible light transmittance, which is convenient for the welder to observe the solder joint.

[0005] The photosensitive tube in the AWF is usually composed of two symmetric photodiodes and is used to detect the welding arc light. Whether the photosensitive tube can quickly detect the welding arc light is very crucial for the AWF to work. In some AWFs, the sensitivity of the photosensitive tube is fixed. In some AWFs, the sensitivity of the photosensitive tube can be manually adjusted or automatically adjusted. Some AWFs provide an adjustment knob for the sensitivity of the photosensitive tube, that is, such as Figure 2The sensitivity control button 123 shown is provided to facilitate the welder to adjust according to the actual situation of the welding operation. However, the sensitivity of the photosensitive tube is not the higher the better. In the actual application environment, in order to prevent the AWF from being triggered by the welding arc light in the adjacent working area and working, the photosensitive tube cannot be too sensitive. The ideal adjustment effect is to be as sensitive as possible while ensuring that it is not accidentally triggered by sunlight, ambient light or the arc light of adjacent welding operations.

[0006] There is currently no measuring device and measuring method for measuring the sensitivity of AWF in an ambient light environment. Summary of the Invention

[0007] In view of the above technical problems, the present application provides a sensitivity measuring device and a sensitivity measuring method for an automatically dimming welding filter, which can accurately simulate the welding arc light and the ambient light environment, and conveniently and accurately measure the sensitivity of the AWF.

[0008] To solve the above technical problems, the present application provides a sensitivity measuring device for an automatically dimming welding filter, including: a trigger light source for simulating and providing welding arc light; an ambient light source simulation unit for simulating and providing ambient light; a reflecting mirror for reflecting the ambient light so that the ambient light reaches the front surface of the sample, the reflecting mirror including a light-transmitting part; and an opening and closing part. When the opening and closing part is in the closed state, the light-transmitting part is blocked, and the welding arc light cannot pass through the light-transmitting part; when the opening and closing part is in the open state, the light-transmitting part is not blocked, and the welding arc light can pass through the light-transmitting part to reach the front surface of the sample.

[0009] In an embodiment of the present application, the ambient light source simulation unit includes an ambient light source, a diffuser plate and a diaphragm. The ambient light source is used to generate initial ambient light, the diffuser plate is used to mix the initial ambient light evenly to generate the ambient light, and the diaphragm is used to adjust the illuminance of the ambient light.

[0010] In an embodiment of the present application, the ambient light source includes an indoor ambient light source and an outdoor ambient light source. The indoor ambient light source is used to generate indoor ambient light, and the outdoor ambient light source is used to generate outdoor ambient light. Among them, the indoor ambient light source includes a fluorescent lamp, and the outdoor ambient light source includes an incandescent lamp.

[0011] In an embodiment of the present application, the trigger light source includes a xenon arc lamp.

[0012] In an embodiment of the present application, the trigger light source further includes a drive circuit for driving the xenon arc lamp. The drive circuit includes a processor, and the drive circuit is configured to modulate the light emitted by the xenon arc lamp through a reference signal so that the light emitted by the xenon arc lamp meets a preset spectrum. Wherein, the reference signal includes a DC component and an AC component. The DC component is the average light output level of the xenon arc lamp, and the AC component is generated by the processor according to preset data.

[0013] In an embodiment of the present application, the drive circuit further includes a microcontroller and an igniter. The igniter is connected to the xenon arc lamp. The microcontroller is configured to control the igniter to start to light the xenon arc lamp and continuously output the reference signal after the xenon arc lamp is lit, so that the xenon arc lamp continuously emits light.

[0014] In an embodiment of the present application, the opening and closing part includes a shutter.

[0015] In an embodiment of the present application, the sample is disposed on a platform, and the reflecting mirror is obliquely disposed on the platform.

[0016] In an embodiment of the present application, it further includes a sample holder for placing the sample. There is a distance between the sample holder and the trigger light source, and the distance is such that the illuminance of the welding arc light at the sample is 132 ± 10 lx.

[0017] The present application also proposes a method for measuring the sensitivity of an automatically dimming welding filter for solving the above technical problems. The method is applied to the sensitivity measuring device as described above and includes: keeping the opening and closing part in a closed state; turning on and preheating the trigger light source; turning on the ambient light source simulation unit to provide outdoor ambient light and placing the sample in the environment of the outdoor ambient light; opening the opening and closing part to allow the welding arc light and the outdoor ambient light to irradiate the front surface of the sample, and obtaining the bright and dark state of the sample; and closing the opening and closing part.

[0018] In an embodiment of the present application, it further includes: turning on the ambient light source simulation unit to provide indoor ambient light and outdoor ambient light, placing the sample in the environment of the indoor ambient light and the outdoor ambient light; opening the opening and closing part to allow the welding arc light, the indoor ambient light and the outdoor ambient light to irradiate the sample, and obtaining the bright and dark state of the sample; and closing the opening and closing part.

[0019] In an embodiment of the present application, turning on the ambient light source simulation unit to provide outdoor ambient light and placing the sample in the environment of the outdoor ambient light includes: adjusting the brightness and diaphragm of the outdoor ambient light source in the ambient light source simulation unit so that the illuminance at the sample reaches 2000 ± 200 lx.

[0020] In one embodiment of the present application, the ambient light source simulation unit is turned on to provide indoor ambient light and outdoor ambient light, so that the sample is in the environment of the indoor ambient light and the outdoor ambient light, including: adjusting the brightness of the outdoor ambient light source, the brightness of the indoor ambient light source and the diaphragm in the ambient light source simulation unit, so that the illuminance at the sample reaches 200±10 lx.

[0021] By setting a trigger light source and an ambient light source simulation unit, the sensitivity measurement device of the present application can simulate the welding arc light and ambient light in different scenarios. By setting a reflector including a light transmissive part and setting an opening and closing part to cooperate with the light transmissive part, it is possible to control the welding arc light and / or ambient light to reach the front surface of the sample, so that the sensitivity test of the sample can be realized. The measurement device and measurement method of the present application are simple, low-cost, the simulated environment is realistic, the test results are accurate, and a practical solution is provided for the AWF sensitivity test. Description of the Drawings

[0022] Including the drawings is to provide a further understanding of the present application. They are incorporated and constitute a part of the present application. The drawings show embodiments of the present application and, together with this specification, serve to explain the principles of the present application. In the drawings:

[0023] Figure 1 is the side of the AWF facing the welding arc light powered by a solar cell;

[0024] Figure 2 is the side of the AWF facing the welder with manual power control;

[0025] Figure 3 is a schematic diagram of the sensitivity measurement device according to an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of the trigger light source in the sensitivity measurement device according to an embodiment of the present application;

[0027] Figure 5 is a schematic spectrum diagram of a typical welding arc light;

[0028] Figure 6 is an exemplary flowchart of the sensitivity measurement method according to an embodiment of the present application;

[0029] Figure 7 is a partial step exemplary flowchart of the sensitivity measurement method according to another embodiment of the present application. Detailed Description of the Invention

[0030] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the figures represent the same structure or operation.

[0031] As shown in the present application, unless the context clearly indicates otherwise, words such as "a", "an", "one", and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0032] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions, and numerical values described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the sake of convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the description. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0034] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be oriented "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0035] In addition, although the terms used in this application are selected from well-known and commonly used terms, some of the terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are described in the relevant parts of the description herein. In addition, it is required to understand this application not only through the actual terms used, but also through the meaning implied by each term.

[0036] Flowcharts are used in this application to illustrate the operations performed by the systems according to the embodiments of this application. It should be understood that the operations before or below do not necessarily have to be performed precisely in sequence. On the contrary, various steps may be performed in reverse order or simultaneously. Also, other operations may be added to these processes, or one or several steps may be removed from these processes.

[0037] The sensitivity measurement device and method of the auto-darkening welding filter of this application do not limit the specific model of the auto-darkening welding filter. Sensitivity refers to the sensitivity of the auto-darkening welding filter to the change in the shade number when the welding arc light changes. In some embodiments, the sensitivity may refer to the sensitivity of the photosensitive tube in the auto-darkening welding filter.

[0038] Figure 3 is a schematic diagram of the sensitivity measurement device according to an embodiment of this application. Refer to Figure 3As shown, the sensitivity measurement device of the present application includes: a trigger light source 310, an ambient light source simulation unit 320, a reflector 330, and an opening and closing part 340. Among them, the trigger light source 310 is used to simulate and provide welding arc light; the ambient light source simulation unit 320 is used to simulate and provide ambient light; the reflector 330 is used to reflect the ambient light so that the ambient light reaches the front surface of the sample 301, and the reflector 330 includes a light-transmitting part 331; when the opening and closing part 340 is in the closed state, the light-transmitting part 331 is blocked, and the welding arc light cannot pass through the light-transmitting part; when the opening and closing part 340 is in the open state, the light-transmitting part 331 is not blocked, and the welding arc light can pass through the light-transmitting part to reach the front surface of the sample 301.

[0039] Among them, the sample 301 is the automatically dimming welding filter to be measured. In the actual application scenario, the front surface of the automatically dimming welding filter faces outward, and when the welding arc light is generated, it will irradiate the front surface of the automatically dimming welding filter. Therefore, when using the sensitivity measurement device of the present application to detect the sensitivity of the sample 301, the front surface of the sample 301 faces the direction of the light emission. As Figure 3 shown, where the arrow indicates the direction of the welding arc light emitted by the trigger light source 310, that is, towards the front surface of the sample 301; and the direction of the ambient light emitted by the ambient light source simulation unit 320, that is, towards the reflector 330.

[0040] According to the sensitivity measurement device of the present application, the trigger light source 310 can provide simulated welding arc light, and the ambient light source simulation unit 320 can provide simulated ambient light, so that the sample 301 is in a controllable ambient light and trigger light source environment, enabling users to conveniently measure the sensitivity of the sample 301.

[0041] In some embodiments, the ambient light source simulation unit 320 includes an ambient light source, a diffusion plate, and a diaphragm. The ambient light source is used to generate initial ambient light, the diffusion plate is used to mix the initial ambient light evenly to generate ambient light, and the diaphragm is used to adjust the illuminance of the ambient light.

[0042] The ambient light source can be any type of light source, and the present application does not limit this.

[0043] The diffusion plate can be a plate with a sieve mesh, and the light can be mixed evenly after passing through the sieve mesh. In some embodiments, the fineness of the particles or micropores on the surface of the diffusion plate is greater than or equal to 1500 mesh, that is, there are 1500 holes on the sieve mesh per unit area. The higher the mesh number, the finer the particles of the diffusion plate, or the smaller and denser the micropore size. Such a diffusion plate can usually make the light scatter more evenly and subtly when passing through, so as to achieve a better diffusion effect and make the outgoing light softer and more uniform.

[0044] In some embodiments, the surface of the diffusion plate is polished and coated with an antireflection film.

[0045] A diaphragm is an optical element used to limit a light beam. The aperture size of the diaphragm is used to limit the diameter of the imaging light beam, thereby controlling the light flux entering the optical system. For example, in a camera, the diaphragm can adjust the amount of incident light. When the light is sufficient, the aperture of the diaphragm is reduced to decrease the amount of incident light and prevent overexposure of the film. When the light is dim, the aperture of the diaphragm is increased to increase the amount of incident light and enable the film to obtain sufficient brightness.

[0046] As Figure 3 shown, in some embodiments, the ambient light source includes an indoor ambient light source 321a and an outdoor ambient light source 321b. The indoor ambient light source 321a is used to generate indoor ambient light, and the outdoor ambient light source 321b is used to generate outdoor ambient light. Among them, the indoor ambient light source 321a includes fluorescent lamps, and the outdoor ambient light source 321b includes incandescent lamps.

[0047] According to these embodiments, the light emitted by the fluorescent lamps can be used to simulate indoor ambient light, and the light emitted by the incandescent lamps can be used to simulate outdoor ambient light. During actual measurement, the indoor ambient light source 321a can be turned on alone, or the outdoor ambient light source 321b can be turned on alone, or both the indoor ambient light source 321a and the outdoor ambient light source 321b can be turned on simultaneously to simulate different test environments.

[0048] For example, when the application scenario of the AWF is outdoors, only the outdoor ambient light source 321b can be turned on to simulate the ambient light. When the application scenario of the AWF is indoors and the room is not a dark room, there will also be outdoor light entering the application scenario through windows, etc. In this case, both the indoor ambient light source 321a and the outdoor ambient light source 321b can be turned on simultaneously.

[0049] According to this ambient light source, the ambient light in different application scenarios can be flexibly simulated.

[0050] In some embodiments, the trigger light source 310 includes a xenon arc lamp. The xenon arc lamp mainly consists of a quartz glass tube, electrodes, and xenon gas, etc. The quartz glass tube has good high-temperature resistance and light transmission performance and can withstand the high temperature and high pressure inside the lamp. The electrodes are usually made of high-temperature-resistant materials such as tungsten and are used to emit and receive electrons. When a voltage is applied across the two ends of the lamp, an electric field is formed between the electrodes, prompting the xenon gas to ionize and discharge. The xenon arc lamp can generate extremely high brightness, and its luminous efficiency is much higher than that of ordinary incandescent lamps and fluorescent lamps. The light emitted by the xenon arc lamp can simulate the welding arc light involved when the AWF is in use.

[0051] In some embodiments, the trigger light source 310 further includes a drive circuit for driving the xenon arc lamp. The drive circuit includes a processor. The drive circuit is used to modulate the light emitted by the xenon arc lamp through a reference signal so that the light emitted by the xenon arc lamp meets a preset spectrum. Among them, the reference signal includes a DC component and an AC component. The DC component is the average light output level of the xenon arc lamp, and the AC component is generated by the processor according to preset data.

[0052] Figure 4 FIG. 1 is a schematic diagram of a trigger light source in a sensitivity measurement device according to an embodiment of the present application. Figure 4 As shown, the trigger light source includes a xenon arc lamp 410 and a driving circuit 420. Figure 4 All circuit structures except the xenon arc lamp 410 belong to the driver circuit 420. Typically, the xenon arc lamp 410 is driven by a high voltage. That is, when a sufficiently high voltage is applied across the xenon arc lamp 410, the xenon gas is ionized, forming a plasma. Under the action of the electric field, electrons accelerate in the plasma and collide with xenon atoms, exciting the xenon atoms to a high-energy state. When the excited xenon atoms return to the ground state, they radiate photons, generating intense visible light. This light can simulate the brightness of a welding arc, but it cannot guarantee a stable and repeatable welding arc.

[0053] Figure 5 This is a typical spectrum diagram of welding arc. Figure 5 As shown, the horizontal axis X represents the frequency in Hz, and the vertical axis Y is a dimensionless relative value used to represent the intensity of the welding arc. Figure 5 The solid line in the figure is the relative spectrum intensity distribution curve of the welding arc, and the dotted line is the tolerance. In order to make the spectrum characteristics of the light emitted by the xenon arc lamp 410 the same as the actual welding arc, the embodiment of the present application sets a processor 421 in the driving circuit 420. The processor 421 can be specifically implemented as a computer or a computer terminal. Assume Figure 5 The spectrum curve shown is the target spectrum curve to be obtained. The processor 421 can read preset data, which is from the target spectrum curve. For example, the preset data is a two-dimensional data column including frequency and intensity. The processor 421 generates the AC component U according to the preset data. ACref The AC component U ACref For and DC component U DCref Together they form the reference signal U Pref , the reference signal U Pref Used to modulate the light emitted by the xenon arc lamp 410.

[0054] In some embodiments, as Figure 4 As shown, the driving circuit 420 also includes an amplifier A volt and A curr , respectively used to detect the voltage and current of the xenon arc lamp 410, and respectively provide signals U volt and U curr . Signal U volt and U curr After multiplication by the multiplier, a power signal U is obtained. pow , which is the power loss of the xenon arc lamp 410. The driving circuit 420 also includes a subtractor, whichpow Subtract the reference voltage U pref Get a differential voltage signal U diff . Amplifier A err The differential voltage signal U diff After amplification, it is fed back to the power driver A pow , power driver A pow Controls the current passing through it and controls the voltage on the xenon arc lamp 410. According to the driving circuit 420 of this embodiment, as long as the reference signal U Pref Keeping constant, the power dissipated by the xenon arc lamp 410 is constant, and the light emitted by the xenon arc lamp 410 is stable. Pref The value of can modulate the light of the xenon arc lamp 410 to form a desired spectrum. Therefore, the driving circuit 420 is a power-stabilized driving circuit with adjustable amplitude.

[0055] Reference signal U Pref By a DC component U DCref and an AC component U ACref Among them, the DC component U DCref Defines the average light output level of a xenon arc lamp and operates at a rated power of 75W. ACref Superimposed on the DC component U DCref The final output light is modulated, and the AC component U DCref The shape and amplitude of U are to accurately simulate the spectrum characteristics of the welding arc. ACref The preset data read by the computer comes from the computer and data acquisition and control board. Figure 5 The spectrum curve is shown.

[0056] In some embodiments, the driving circuit 420 further includes a microcontroller 430 and an igniter 440. The igniter 440 is connected to the xenon arc lamp 410. The microcontroller 430 is used to control the igniter 440 to start to light the xenon arc lamp 410 and continuously output the reference signal U after the xenon arc lamp 410 is lit. Pref , so that the xenon arc lamp 410 continues to emit light.

[0057] During the ignition process of the xenon arc lamp 410, the voltage on the xenon arc lamp 410 is generally required to be higher than the rated value before it can be lit. Compared with the existing drive circuit, the drive circuit 420 of this embodiment of the present application has an additional microcontroller 430. The microcontroller 430 mainly has two functions: one is to start the ignition, that is, to control the igniter 440 to start and light the xenon arc lamp 410; the other is to ensure that the xenon arc lamp continues to emit light after ignition, and continuously provide a stable DC component U DCref . So that the DC component U DCref With AC component UACref Together form a reference signal U Pref , so that the light emitted by the xenon arc lamp 410 meets a preset spectrum, thereby more realistically simulating the welding arc light.

[0058] Such as Figure 4 As shown, in some embodiments, the drive circuit 420 further includes a switch for controlling the on or off of the drive circuit 420. When the switch is on, the drive circuit 420 is powered on, enabling the microcontroller 430 to start working.

[0059] Continue to refer to Figure 3 , in some embodiments, the opening and closing part 340 of the present application is a shutter. The shutter can be mechanical or electronic. If the working state of the automatic dimming welding filter is judged by the human eye, a mechanical shutter is selected; if the working state of the automatic dimming welding filter is judged by a computer, an electronic shutter is selected. In some embodiments, the reflector 330 is a mirror with an opening, and the opening is the light transmitting part 331. The shutter can be arranged at the opening. When the shutter is in the closed state, the light transmitting part 331 is blocked, and the welding arc light cannot pass through the light transmitting part 331; when the shutter is in the open state, the light transmitting part 331 is not blocked, and the welding arc light can pass through the light transmitting part 331 to reach the front surface of the sample 301. In some other embodiments, the light transmitting part 331 may not be an opening, but be formed of a light transmitting material through which light can pass.

[0060] In other embodiments, the opening and closing part 340 can also be connected to the reflector 330 in other connection ways. For example, by means of hinging or a rotating shaft, it is connected near the opening of the reflector 330. The opening and closing part 340 can rotate around a rotation axis to close to the surface of the reflector 330 to block the light transmitting part 331, or open to move away from the surface of the reflector 330 to expose the light transmitting part 331.

[0061] Such as Figure 3 As shown, in some embodiments, the sample 301 is arranged on the platform 302, and the reflector 330 is inclined on the platform 302. There is an included angle between the surface of the reflector 330 and the platform 302. The reflector 330 is used to reflect the ambient light so that the reflected light reaches the front surface of the sample 301 in parallel. This purpose can be achieved by setting the positional relationship between the ambient light source simulation unit 320 and the reflector 330.

[0062] In other embodiments, it is not necessary for the ambient light and the welding arc light to reach the front surface of the sample 301 in parallel. In an actual welding operation scenario, the welding arc light and the ambient light do not reach the AWF surface in parallel. The angles at which the welding arc light and the ambient light are incident on the AWF surface can be adjusted according to the actual situation, and the present application does not limit this.

[0063] In some embodiments, the angle between the reflector 330 and the surface of the platform 302 is 45 degrees. The sample 301 is placed vertically on the platform 302.

[0064] In some embodiments, the sensitivity measurement device further includes a sample holder 350 for placing the sample 301. There is a distance d between the sample holder 350 and the trigger light source 310. The distance d is such that the illuminance of the welding arc light at the sample 301 is 132 ± 10 lx. This distance d can be adjusted when installing the sensitivity measurement device. Specifically, guide rails can be provided on the platform 302, and both the trigger light source 310 and the sample holder 350 are installed on the guide rails. The trigger light source 310 and the sample holder 350 can move on the guide rails. Turn on the trigger light source 310, move the trigger light source 310 or the sample holder 350, and detect the illuminance at the sample 301. When the illuminance is within the range of 132 ± 10 lx, fix the trigger light source 310 or the sample holder 350.

[0065] By setting the distance d, the sensitivity measurement device can more truly simulate the actual use scenario of AWF and improve the authenticity of the simulation.

[0066] Figure 6 It is an exemplary flowchart of the sensitivity measurement method according to an embodiment of the present application. This sensitivity measurement method is applied to the sensitivity measurement device described above. Therefore, the content about the sensitivity measurement device above can be used to explain this sensitivity measurement method, and the same content will not be repeated.

[0067] Combined Figure 3 and Figure 6 As shown, the sensitivity measurement method of this embodiment includes:

[0068] Step S610: Make the opening and closing part 340 in a closed state;

[0069] Step S620: Turn on the preheating trigger light source 310;

[0070] Step S630: Turn on the ambient light simulation unit 320 to provide outdoor ambient light, and make the sample 301 in an environment of outdoor ambient light;

[0071] Step S640: Open the opening and closing part 340, so that the welding arc light and the outdoor ambient light irradiate the front surface of the sample 301, and obtain the bright and dark state of the sample 301; and

[0072] Step S650: Close the opening and closing part 340.

[0073] In the above step S610, making the opening and closing part 340 in a closed state means that even if the light-transmitting part 331 is blocked, the light emitted by the trigger light source 310 will not reach the sample 301.

[0074] In some embodiments, the preheating duration of the trigger light source 310 is greater than or equal to 15 minutes. At this time, it can be considered that the switch of the driving circuit 420 is turned on, but the xenon arc lamp 410 has not been lit yet.

[0075] Steps S610 - S650 are used to simulate the scenario of outdoor operation. Therefore, in step S630, specifically, the outdoor environmental light source 321b in the environmental light source simulation unit 320 is turned on, while the indoor environmental light source 321a is kept off.

[0076] In some embodiments, step S630 includes: adjusting the brightness and diaphragm 323b of the outdoor environmental light source 321b in the environmental light source simulation unit 320 so that the illuminance at the sample 301 reaches 2000 ± 200 lx. In this embodiment, by making the illuminance reach 2000 ± 200 lx, a stable outdoor environmental light can be simulated.

[0077] In step S640, at this time, the preheating duration of the trigger light source 310 has reached the expectation, the xenon arc lamp 410 has been lit, the opening and closing part 340 is opened, so that the light of the xenon arc lamp 410 and the outdoor environmental light simulated by the incandescent lamp are parallelly irradiated on the sample 301 together. Obtaining the bright and dark states of the sample 301 includes manual observation and computer acquisition. Manual observation includes: manually observing whether the AWF of the sample 301 changes from the bright state to the dark state. If so, it indicates that the sensitivity of the sample 301 is normal; if not, it indicates that the sample 301 is abnormal. Computer acquisition includes: other devices collect the transmittance of the AWF and judge whether the transmittance drops instantaneously. If so, it indicates that the sensitivity of the sample 301 is normal; if not, it indicates that the sample 301 is abnormal. At the same time, as long as the xenon arc lamp 410 is in the lit state, the AWF should remain in the dark state, otherwise it indicates that the sample 301 is abnormal. According to the speed of the bright and dark conversion of the AWF, the size of its sensitivity can also be judged. The speed of this bright and dark conversion is proportional to the size of the sensitivity.

[0078] In step S650, after closing the opening and closing part 340, the bright and dark states of the sample 301 can also be obtained. At this time, the welding arc light is isolated, and only the outdoor environmental light exists in the environment where the sample 301 is located. The AWF should sequentially change to the initial bright state. At this time, the bright and dark states of the sample 301 are obtained, and according to this bright and dark state, it is judged whether the AWF is normal and the size of its sensitivity.

[0079] According to the above steps S610 - S650, it can be judged whether the sample 301 is normal and its sensitivity when the welding arc light occurs (the opening and closing part 340 is opened) and disappears (the opening and closing part 340 is closed).

[0080] Figure 7 It is an exemplary flowchart of part of the steps of the sensitivity measurement method according to another embodiment of the present application. Refer to Figure 3 and Figure 7As shown, the sensitivity measurement method of this embodiment further includes:

[0081] Step S710: Turn on the environmental light source simulation unit 320 to provide indoor environmental light and outdoor environmental light, so that the sample 301 is in an environment of indoor environmental light and outdoor environmental light;

[0082] Step S720: Open the opening and closing part 340, so that the welding arc light, indoor environmental light, and outdoor environmental light irradiate the sample 301, and obtain the bright and dark state of the sample 301; and

[0083] Step S730: Close the opening and closing part 340.

[0084] The above steps S710 - S730 can be executed after steps S610 and S620. The execution order of steps S710 - S730 and steps S630 - S650 can be interchanged.

[0085] According to S710 - S730, it is applicable to simulate the indoor operation scenario, that is, the scenario with both indoor environmental light and outdoor environmental light.

[0086] In some embodiments, step S710 includes: adjusting the brightness of the outdoor environmental light source 321b, the brightness of the indoor environmental light source 321a, and the diaphragms 323a, 323b in the environmental light source simulation unit 320, so that the illuminance at the sample 301 reaches 200 ± 10 lx. In this embodiment, by making the illuminance reach 200 ± 10 lx, the regularly changing indoor environmental light can be simulated. Specifically, the "regular change" here refers to the change in frequency. For example, fluorescent lamps have stroboscopic effects that are imperceptible to the human eye. In fact, the indoor environmental light has flickers, and this kind of flicker may trigger the AWF product to work. Therefore, when designing the AWF product, the situation of mis - triggering due to flicker should be avoided. The environmental light source simulation unit 320 of the present application can simulate the stroboscopic indoor environmental light and simulate the real working environment with environmental light interference, which is beneficial to more accurately testing the sensitivity of the sample.

[0087] In some embodiments, when testing the sample 301, steps S630 and S640 can be repeatedly executed, or steps S710 and S720 can be repeatedly executed to observe whether the sample 301 can work normally.

[0088] By using the sensitivity measurement device and the sensitivity measurement method of the present application, it is possible to test whether the sensitivity of the AWF is good or bad in the presence of environmental light interference. The measurement device and the measurement method are simple, low - cost, the simulated environment is realistic, the test results are accurate, and a practical solution is provided for the AWF sensitivity test.

[0089] This application uses specific terms to describe the embodiments of this application. For example, "an embodiment", "one embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0090] Similarly, it should be noted that, in order to simplify the description of this application and thus help the understanding of one or more embodiments of the invention, in the foregoing description of the embodiments of this application, sometimes multiple features are grouped into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this application are more than the features mentioned. In fact, the features of the embodiment are fewer than all the features of the single embodiment disclosed above.

[0091] In some embodiments, numbers are used to describe the components and the quantity of attributes. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately", or "substantially" in some examples. Unless otherwise specified, "about", "approximately", or "substantially" indicate that the said numbers allow a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in this application are all approximate values, and these approximate values can be changed according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should consider the specified significant digits and adopt the method of retaining the general number of digits. Although the numerical ranges and parameters used in some embodiments of this application to confirm the breadth of their scope are approximate values, in specific embodiments, such numerical settings are as precise as possible within the feasible range.

Claims

1. An automatic dimming welding filter sensitivity measurement device, characterized in that Comprising: A trigger light source for simulating and providing welding arc light; An ambient light source simulation unit for simulating and providing ambient light; A reflector for reflecting the ambient light so that the ambient light reaches the front surface of the sample, the reflector comprising a light-transmitting portion; and An opening and closing portion, when the opening and closing portion is in a closed state, the light-transmitting portion is blocked, and the welding arc light cannot pass through the light-transmitting portion; when the opening and closing portion is in an open state, the light-transmitting portion is not blocked, and the welding arc light can pass through the light-transmitting portion to reach the front surface of the sample.

2. The sensitivity measurement device according to claim 1, characterized in that, The ambient light source simulation unit includes an ambient light source, a diffusion plate, and a diaphragm. The ambient light source is used to generate initial ambient light, the diffusion plate is used to mix the initial ambient light evenly to generate the ambient light, and the diaphragm is used to adjust the illuminance of the ambient light.

3. The sensitivity measurement device according to claim 1, wherein The ambient light source includes an indoor ambient light source and an outdoor ambient light source. The indoor ambient light source is used to generate indoor ambient light, and the outdoor ambient light source is used to generate outdoor ambient light. Among them, the indoor ambient light source includes fluorescent lamps, and the outdoor ambient light source includes incandescent lamps.

4. The sensitivity measurement device according to claim 1, wherein, The trigger light source includes a xenon arc lamp.

5. The sensitivity measurement device according to claim 4, wherein, The trigger light source further includes a drive circuit for driving the xenon arc lamp. The drive circuit includes a processor, and the drive circuit is used to modulate the light emitted by the xenon arc lamp through a reference signal so that the light emitted by the xenon arc lamp meets a preset spectrum. Among them, the reference signal includes a DC component and an AC component. The DC component is the average light output level of the xenon arc lamp, and the AC component is generated by the processor according to preset data.

6. The sensitivity measurement device according to claim 5, characterized in that, The drive circuit further includes a microcontroller and an igniter. The igniter is connected to the xenon arc lamp. The microcontroller is used to control the igniter to start to light the xenon arc lamp, and continuously output the reference signal after the xenon arc lamp is lit so that the xenon arc lamp continuously emits light.

7. The sensitivity measurement device according to claim 1, characterized in that, The opening and closing portion includes a shutter.

8. The sensitivity measurement device according to claim 1, characterized in that, The sample is disposed on a platform, and the reflector is inclined and disposed on the platform.

9. The sensitivity measurement device according to claim 1, wherein, It further includes a sample holder for placing the sample. There is a distance between the sample holder and the trigger light source, and the distance is such that the illuminance of the welding arc light at the sample is 132±10 lx.

10. A method for measuring the sensitivity of an automatically dimming welding filter, applied to the sensitivity measuring device according to any one of claims 1-9, characterized in that, Comprising: Put the opening and closing portion in a closed state; Turn on and preheat the trigger light source; Turn on the ambient light source simulation unit to provide outdoor ambient light, and place the sample in the environment of the outdoor ambient light; Open the opening and closing portion so that the welding arc light and the outdoor ambient light irradiate the front surface of the sample, and obtain the bright and dark state of the sample; And Close the opening and closing portion.

11. The sensitivity measurement method according to claim 10, characterized in that, It further includes: Turn on the ambient light source simulation unit to provide indoor ambient light and outdoor ambient light, and place the sample in the environment of the indoor ambient light and the outdoor ambient light; Open the opening and closing portion so that the welding arc light, the indoor ambient light, and the outdoor ambient light irradiate the sample, and obtain the bright and dark state of the sample; And Close the opening and closing portion.

12. The sensitivity measurement method according to claim 10, wherein Turn on the environmental light source simulation unit to provide outdoor ambient light, and place the sample in the environment of the outdoor ambient light, including: adjusting the brightness and diaphragm of the outdoor ambient light source in the environmental light source simulation unit so that the illuminance at the sample reaches 2000 ± 200 lx.

13. The sensitivity measurement method according to claim 11, wherein Turn on the environmental light source simulation unit to provide indoor ambient light and outdoor ambient light, and place the sample in the environment of the indoor ambient light and outdoor ambient light, including: adjusting the brightness of the outdoor ambient light source, the brightness of the indoor ambient light source and the diaphragm in the environmental light source simulation unit so that the illuminance at the sample reaches 200 ± 10 lx.

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