Sensitivity measuring device of auto-darkening welding filter

Abstract

The utility model provides a sensitivity measuring device of an auto-darkening welding filter lens. 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 is easy to operate, low in cost, vivid in simulation environment and accurate in test result.

Description

Sensitivity measuring device for automatic light-changing welding filters Technical Field

[0001] This application mainly relates to the field of testing technology for personal protective equipment products, and in particular to a sensitivity measuring device for an automatic light-changing welding filter. Background Technology

[0002] Automatic Welding Filter (AWF) is a personal protective equipment that protects against harmful strong light such as ultraviolet, infrared and blue light during welding operations. It is a high-tech product that integrates optics, electronics and materials science, and is mainly composed of control circuits, liquid crystal light valve (LCD), filter, phototube and battery.

[0003] When an electric arc is generated during welding, the phototube can detect the arc light instantly. The circuit control module amplifies and transmits the arc light signal, and the current rapidly (typically on the order of milliseconds) drives the LCD to operate (darken) to block the arc light and protect the human eye. The LCD operating or darkening means that its light-blocking value increases from a lower value, such as 4 (corresponding to a visible light transmittance of approximately 5%), to a higher value, such as 11 (corresponding to a visible light transmittance of approximately 0.005%), at a speed of milliseconds, and it can maintain the dark light-blocking value unchanged when an electric arc is present.

[0004] Generally, the weld arc flash (AWF) is powered by a battery and / or a solar cell. Power control can be automatic or manual. Figure 1 shows the side of the AWF powered by a solar cell facing the welding arc. This includes the solar cell 111, the phototube 112, and the liquid crystal light valve 113. Figure 2 shows the side of the AWF with manually controlled power facing the welder, including a power switch 121, a dark-state shielding control button 122, a sensitivity control button 123, and a liquid crystal light valve 124. When the power switch is on, if no welding is occurring, the AWF is usually in a bright state (e.g., shielding button 4), meaning it has high visible light transmission, making it easier for the welder to observe the weld joint.

[0005] The photocell in an welder's arc flash (AWF) typically consists of two symmetrical photodiodes used to detect welding arc light. The photocell's ability to quickly detect the welding arc light is crucial for the AWF's proper functioning. In some AWFs, the photocell's sensitivity is fixed. In others, the sensitivity can be adjusted manually or automatically. Some AWFs provide a sensitivity adjustment knob, as shown in Figure 2 (sensitivity control buttons 123), allowing welders to adjust it according to the actual welding operation. However, higher sensitivity is not always better. In practical applications, to prevent the AWF from being triggered by welding arc light from adjacent work areas, the photocell should not be too sensitive. Ideally, it should be as sensitive as possible while ensuring it is not falsely triggered by sunlight, ambient light, or arc light from adjacent welding operations.

[0006] Currently, there are no measurement devices or methods for measuring the sensitivity of AWF under ambient light conditions. Summary of the Invention

[0007] This application addresses the aforementioned technical problems by providing a sensitivity measurement device for an automatic light-changing welding filter (AWF), which can accurately simulate welding arc light and ambient light environment, and conveniently and accurately measure the sensitivity of the AWF.

[0008] To address the aforementioned technical problems, this application provides a sensitivity measurement device for an automatic light-changing welding filter, 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 a sample, the reflector including a light-transmitting portion; and an opening / closing portion, wherein when the opening / 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; and when the opening / 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.

[0009] In one embodiment of this application, the ambient light source simulation unit includes an ambient light source, a diffuser plate, and an aperture. 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 aperture is used to adjust the illuminance of the ambient light.

[0010] In one embodiment of this 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. The indoor ambient light source includes a fluorescent lamp, and the outdoor ambient light source includes an incandescent lamp.

[0011] In one embodiment of this application, the triggering light source includes a xenon arc lamp.

[0012] In one embodiment of this application, the trigger light source further includes a driving circuit for driving the xenon arc lamp. The driving circuit includes a processor and is used to modulate the light emitted by the xenon arc lamp using a reference signal so that the light emitted by the xenon arc lamp meets a preset spectrum. 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 one embodiment of this application, the driving 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 and light up the xenon arc lamp, and to continuously output the reference signal after the xenon arc lamp is lit, so that the xenon arc lamp continues to emit light.

[0014] In one embodiment of this application, the opening / closing portion includes a shutter.

[0015] In one embodiment of this application, the sample is placed on a platform, and the reflector is tilted on the platform.

[0016] In one embodiment of this application, a sample holder is further included for placing the sample. The sample holder is at a distance from the trigger light source such that the illuminance of the welding arc light at the sample is 132±10 lx.

[0017] The sensitivity measurement device of this application, by setting up a trigger light source and an ambient light source simulation unit, can simulate welding arc light and ambient light under different scenarios. By setting up a reflector including a light-transmitting part, and setting an opening and closing part to cooperate with the light-transmitting part, the arrival of welding arc light and / or ambient light on the front surface of the sample can be controlled, thereby realizing the testing of sample sensitivity. The measurement device of this application is simple to operate, low in cost, simulates the environment realistically, and provides accurate test results, providing a practical solution for AWF sensitivity testing. Attached Figure Description

[0018] The accompanying drawings are included to provide a further understanding of this application; they are incorporated into and constitute a part of this application. The drawings illustrate embodiments of this application and, together with this specification, serve to explain the principles of this application. In the drawings:

[0019] Figure 1 shows the side of the AWF powered by solar cells facing the welding arc.

[0020] Figure 2 shows the AWF of the manual control power supply facing the welder;

[0021] Figure 3 is a schematic diagram of a sensitivity measuring device according to an embodiment of this application;

[0022] Figure 4 is a schematic diagram of the trigger light source in a sensitivity measuring device according to an embodiment of this application;

[0023] Figure 5 is a schematic diagram of the spectrum of a typical welding arc.

[0024] Figure 6 is an exemplary flowchart of a sensitivity measurement method according to an embodiment of this application;

[0025] Figure 7 is an exemplary flowchart of some steps of a sensitivity measurement method according to another embodiment of this application. Detailed Implementation

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0027] As indicated in this application, unless the context clearly indicates otherwise, the words "a," "an," "an," 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 explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0029] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0030] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0031] Furthermore, although the terminology used in this application is selected from commonly known and used terms, some terms mentioned in this application's specification may have been chosen by the applicant according to his or her judgment, and their detailed meanings are explained in the relevant sections of the description herein. Moreover, this application is to be understood not only by the actual terms used, but also by the meaning implied by each term.

[0032] Flowcharts are used in this application to illustrate the operations performed by the system according to embodiments of this application. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, various steps can be processed in reverse order or simultaneously. Furthermore, other operations may be added to these processes, or one or more steps may be removed from these processes.

[0033] The sensitivity measurement device and method for the automatic brightness-changing welding filter in this application do not limit the specific model of the automatic brightness-changing welding filter. Sensitivity refers to the sensitivity of the automatic brightness-changing welding filter to changes in the light-blocking number when the welding arc light changes. In some embodiments, sensitivity may refer to the sensitivity of the phototube in the automatic brightness-changing welding filter.

[0034] Figure 3 is a schematic diagram of a sensitivity measuring device according to an embodiment of this application. Referring to Figure 3, the sensitivity measuring device of this application includes: a trigger light source 310, an ambient light source simulation unit 320, a reflector 330, and an opening / closing part 340. 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 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 / 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 / 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.

[0035] Sample 301 is the auto-dimming welding filter to be measured. In real-world applications, the front surface of the auto-dimming welding filter faces outwards, and the welding arc light will illuminate its front surface. Therefore, when using the sensitivity measurement device of this application to test the sensitivity of sample 301, the front surface of sample 301 is oriented towards the direction of light emission. As shown in Figure 3, the arrows indicate the direction of the welding arc light emitted by the trigger light source 310, i.e., towards the front surface of sample 301; and the direction of the ambient light emitted by the ambient light source simulation unit 320, i.e., towards the reflector 330.

[0036] According to the sensitivity measuring device of this 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 environment of ambient light and trigger light source, enabling the user to conveniently measure the sensitivity of the sample 301.

[0037] In some embodiments, the ambient light source simulation unit 320 includes an ambient light source, a diffuser plate, and an aperture. 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 ambient light, and the aperture is used to adjust the illuminance of the ambient light.

[0038] The ambient light source can be any type of light source, and this application does not impose any restrictions on it.

[0039] A diffuser plate can be a plate with a screen, through which light is mixed uniformly. In some embodiments, the fineness of the particles or micropores on the surface of the diffuser plate is greater than or equal to 1500 mesh, meaning there are 1500 holes per unit area of ​​screen. A higher mesh number indicates finer particles or smaller, more densely distributed micropores. Such diffusers typically enable more uniform and subtle scattering of light as it passes through, resulting in better diffusion and softer, more uniform emitted light.

[0040] In some embodiments, the surface of the diffuser plate is polished and coated with an anti-reflection film.

[0041] An aperture is an optical element used to limit a beam of light. The size of the aperture limits the diameter of the imaging beam, thereby controlling the amount of light entering the optical system. For example, in a camera, the aperture can adjust the amount of light entering. In bright light, the aperture can be narrowed to reduce the amount of light entering and prevent overexposure of the film; in dim light, the aperture can be widened to increase the amount of light entering and provide sufficient brightness to the film.

[0042] As shown in Figure 3, 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. The indoor ambient light source 321a includes a fluorescent lamp, and the outdoor ambient light source 321b includes an incandescent lamp.

[0043] According to these embodiments, light emitted by fluorescent lamps can be used to simulate indoor ambient light, and light emitted by incandescent lamps can be used to simulate outdoor ambient light. In actual measurements, only the indoor ambient light source 321a, only the outdoor ambient light source 321b, or both the indoor ambient light source 321a and the outdoor ambient light source 321b can be turned on to simulate different test environments.

[0044] For example, when the AWF is used outdoors, only the outdoor ambient light source 321b can be turned on to simulate ambient light. When the AWF is used indoors, and the indoor environment is not dark, outdoor light will enter the application scene through windows, etc., then both the indoor ambient light source 321a and the outdoor ambient light source 321b can be turned on simultaneously.

[0045] Based on this ambient light source, ambient light in different application scenarios can be flexibly simulated.

[0046] 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. The quartz glass tube has excellent high-temperature resistance and light transmission properties, and can withstand the high temperature and pressure inside the lamp. The electrodes are typically made of high-temperature resistant materials such as tungsten, and are used to emit and receive electrons. When a voltage is applied across the lamp, an electric field is formed between the electrodes, causing the xenon gas to ionize and discharge. Xenon arc lamps can produce extremely high brightness, and their luminous efficiency is far higher than that of ordinary incandescent and fluorescent lamps. The light emitted by a xenon arc lamp can simulate the welding arc light involved in AWF (Autoclave Welding) operations.

[0047] In some embodiments, the trigger light source 310 further includes a driving circuit for driving the xenon arc lamp. The driving circuit includes a processor and 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. 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.

[0048] Figure 4 is a schematic diagram of the trigger light source in a sensitivity measurement device according to an embodiment of this application. As shown in Figure 4, the trigger light source includes a xenon arc lamp 410 and a driving circuit 420. It should be noted that the circuit structure in Figure 4, except for the xenon arc lamp 410, belongs to the driving 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, xenon gas is ionized to form 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 emit photons, thereby producing intense visible light. Such light can simulate the brightness of a welding arc, but it cannot guarantee a stable and repeatable welding arc.

[0049] Figure 5 is a typical spectrum diagram of a welding arc. As shown in Figure 5, the horizontal axis X represents frequency in Hz, and the vertical axis Y is a dimensionless relative value used to represent the intensity of the welding arc. The solid line in Figure 5 is the relative spectral intensity distribution curve of the welding arc, and the dashed line represents the tolerance. To ensure that the light emitted by the xenon arc lamp 410 has the same spectral characteristics as the actual welding arc, this embodiment includes a processor 421 in the drive circuit 420. The processor 421 can be specifically implemented as a computer or computer terminal, etc. Assuming the spectrum curve shown in Figure 5 is the desired target spectrum curve, the processor 421 can read preset data from the target spectrum curve, for example, the preset data is a two-dimensional data column including frequency and intensity. The processor 421 generates an AC component U based on this preset data. ACref The AC component U ACref Used for DC component U DCref Together they form a reference signal U Pref The reference signal U Pref Used to modulate the light emitted by the xenon arc lamp 410.

[0050] In some embodiments, as shown in FIG4, the driving circuit 420 further includes amplifier A. volt and A curr These are used to detect the voltage and current of the xenon arc lamp 410, and respectively provide signal U. volt and U curr . SignalU volt and U curr After multiplication by a multiplier, a power signal U is obtained.pow This refers to the power loss of the xenon arc lamp 410. The drive circuit 420 also includes a subtractor, from U... pow Subtract the reference voltage U from the middle pref A differential voltage signal U is obtained diff Amplifier A err The differential voltage signal U diff The amplified signal is fed back to the power driver A. pow Power driver A pow The current flowing through it is controlled, while the voltage on the xenon arc lamp 410 is also controlled. According to the drive circuit 420 of this embodiment, as long as the reference signal U... Pref By keeping the reference signal U constant, the power dissipated by the xenon arc lamp 410 remains constant, and the light emitted by the xenon arc lamp 410 is stable. Pref The value of the value can be used to modulate the light from the xenon arc lamp 410, thereby forming the desired spectrum. Therefore, the drive circuit 420 is an amplitude-adjustable power-stabilized drive circuit.

[0051] Reference signal U Pref Consists of a DC component U DCref And an AC component U ACref Composition. Among them, the DC component U DCref The average light output level of the xenon arc lamp was defined, and the xenon arc lamp was operated at its rated power of 75W. AC component U ACref Superimposed on the DC component U DCref The final output light is then modulated, with the AC component U... DCref The shape and amplitude are designed to accurately simulate the spectral characteristics of welding arc light. In some embodiments, the AC component U... ACref The preset data, which is generated by a computer and a data acquisition and control board, is derived from the spectrum curve shown in Figure 5.

[0052] In some embodiments, the drive 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 controls the igniter 440 to start up the xenon arc lamp 410 and continuously outputs a reference signal U after the xenon arc lamp 410 is lit. Pref This ensures that the xenon arc lamp 410 continues to emit light.

[0053] During the ignition process of the xenon arc lamp 410, it is generally required that the voltage on the xenon arc lamp 410 be higher than the rated value in order to be lit. Compared with the existing drive circuit, the drive circuit 420 of this embodiment adds a microcontroller 430. The microcontroller 430 mainly performs two functions: first, to start ignition, that is, to control the igniter 440 to start and light the xenon arc lamp 410; second, to continuously provide a stable DC component U so that the xenon arc lamp can continue to emit light after ignition.DCref This makes the DC component U DCref With the exchange component U ACref Together they form a reference signal U Pref This ensures that the light emitted by the xenon arc lamp 410 meets the preset spectrum, thereby more realistically simulating welding arc light.

[0054] As shown in Figure 4, in some embodiments, the drive circuit 420 further includes a switch for controlling the drive circuit 420 to turn on or off. When the switch is on, the drive circuit 420 is powered on, causing the microcontroller 430 to start working.

[0055] Referring again to Figure 3, in some embodiments, the opening / closing portion 340 of this application is a shutter. The shutter can be mechanical or electronic. If the working state of the automatic light-changing welding filter is determined by the human eye, a mechanical shutter is selected; if the working state of the automatic light-changing welding filter is determined by a computer, an electronic shutter is selected. In some embodiments, the reflector 330 is a mirror with an opening, which is the light-transmitting portion 331, and the shutter can be located at this opening. When the shutter is closed, the light-transmitting portion 331 is blocked, and the welding arc light cannot pass through the light-transmitting portion 331; when the shutter is open, the light-transmitting portion 331 is not blocked, and the welding arc light can pass through the light-transmitting portion 331 to reach the front surface of the sample 301. In other embodiments, the light-transmitting portion 331 may not be an opening, but may be formed of a light-transmitting material, through which light can pass.

[0056] In other embodiments, the opening / closing portion 340 can also be connected to the reflector 330 in other ways. For example, it can be connected near the opening of the reflector 330 by means of a hinge or pivot. The opening / closing portion 340 can rotate about a rotation axis to close to the surface of the reflector 330 to block the light-transmitting portion 331, or to open to the surface of the reflector 330 to expose the light-transmitting portion 331.

[0057] As shown in Figure 3, in some embodiments, sample 301 is placed on platform 302, and reflector 330 is tilted on platform 302. An angle exists between reflector 330 and the surface of platform 302. Reflector 330 is used to reflect ambient light so that the reflected light reaches the front surface of sample 301 in parallel. This can be achieved by adjusting the positional relationship between ambient light source simulation unit 320 and reflector 330.

[0058] In other embodiments, the ambient light and welding arc light do not necessarily have to arrive at the front surface of sample 301 in parallel. In actual welding operation scenarios, the welding arc light and ambient light do not arrive at the AWF surface in parallel. The angle at which the welding arc light and ambient light are incident on the AWF surface can be adjusted according to the actual situation, and this application does not impose any restrictions on this.

[0059] 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.

[0060] In some embodiments, the sensitivity measuring device further includes a sample holder 350 for placing a sample 301. A distance d is provided between the sample holder 350 and the trigger light source 310, such that the illuminance of the welding arc light at the sample 301 is 132 ± 10 lx. This distance d can be adjusted during the installation of the sensitivity measuring device. Specifically, a guide rail can be provided on the platform 302, and both the trigger light source 310 and the sample holder 350 can be mounted on the guide rail, allowing them to move. The trigger light source 310 is turned on, the trigger light source 310 or the sample holder 350 is moved, and the illuminance at the sample 301 is detected. When the illuminance is within the range of 132 ± 10 lx, the trigger light source 310 or the sample holder 350 is fixed.

[0061] By setting a distance d, the sensitivity measurement device can more realistically simulate the actual use scenario of AWF, thus improving the authenticity of the simulation.

[0062] Figure 6 is an exemplary flowchart of a sensitivity measurement method according to an embodiment of this application. This sensitivity measurement method is applied to the sensitivity measurement device described above; therefore, the content regarding the sensitivity measurement device described above can be used to explain this sensitivity measurement method, and the same content will not be repeated.

[0063] Referring to Figures 3 and 6, the sensitivity measurement method of this embodiment includes:

[0064] Step S610: Put the opening / closing part 340 into the closed state;

[0065] Step S620: Turn on the preheating trigger light source 310;

[0066] Step S630: Turn on the ambient light simulation unit 320 to provide outdoor ambient light, so that the sample 301 is in an outdoor ambient light environment;

[0067] Step S640: Open the opening / closing part 340 to allow the welding arc light and outdoor ambient light to illuminate the front surface of the sample 301, and obtain the bright and dark state of the sample 301; and

[0068] Step S650: Close the opening / closing part 340.

[0069] In step S610 above, the opening and closing part 340 is in a closed state, so 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.

[0070] In some embodiments, the preheating time for 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 drive circuit 420 is turned on, but the xenon arc lamp 410 has not yet been lit.

[0071] Steps S610-S650 are used to simulate outdoor operation scenarios. Therefore, step S630 specifically involves turning on the outdoor ambient light source 321b in the ambient light source simulation unit 320, while keeping the indoor ambient light source 321a off.

[0072] In some embodiments, step S630 includes adjusting the brightness of the outdoor ambient light source 321b and the aperture 323b in the ambient light source simulation unit 320 to achieve an illuminance of 2000±200 lx at the sample 301. In this embodiment, by achieving an illuminance of 2000±200 lx, stable outdoor ambient light can be simulated.

[0073] In step S640, the preheating time of the trigger light source 310 has reached the expected duration, the xenon arc lamp 410 has been lit, and the opening / closing part 340 is opened, allowing the light from the xenon arc lamp 410 to illuminate the sample 301 in parallel with the outdoor ambient light simulated by the incandescent lamp. The brightness state of the sample 301 is obtained through both manual observation and computer acquisition. Manual observation includes manually observing whether the AWF of the sample 301 transitions from a bright state to a dark state. If it does, it indicates that the sensitivity of the sample 301 is normal; otherwise, it indicates an abnormality. Computer acquisition includes acquiring the transmittance of the AWF using other devices and determining whether the transmittance drops instantaneously. If it does, it indicates that the sensitivity of the sample 301 is normal; otherwise, it indicates an abnormality. Simultaneously, as long as the xenon arc lamp 410 is lit, the AWF should remain in a dark state; otherwise, it indicates an abnormality in the sample 301. The speed of the AWF brightness-to-dark transition can also be used to determine its sensitivity. This brightness-to-dark transition speed is directly proportional to the sensitivity.

[0074] In step S650, after closing the opening / closing part 340, the brightness state of sample 301 can also be acquired. At this time, the welding arc light is isolated, and the environment in which sample 301 is located is only outdoor ambient light. The AWF should gradually transition back to the initial brightness state. At this time, the brightness state of sample 301 is acquired, and the AWF's normal operation and sensitivity are determined based on this brightness state.

[0075] Based on the above steps S610-S650, it can be determined whether the sample 301 is normal and its sensitivity when the welding arc occurs (opening part 340 opens) and disappears (opening part 340 closes).

[0076] Figure 7 is an exemplary flowchart of some steps of a sensitivity measurement method according to another embodiment of this application. Referring to Figures 3 and 7, the sensitivity measurement method of this embodiment further includes:

[0077] Step S710: Turn on the ambient light simulation unit 320 to provide indoor ambient light and outdoor ambient light, so that the sample 301 is in the environment of indoor ambient light and outdoor ambient light;

[0078] Step S720: Open the opening / closing part 340 to allow the welding arc light, indoor ambient light, and outdoor ambient light to illuminate the sample 301, and obtain the brightness and darkness state of the sample 301; and

[0079] Step S730: Close the opening / closing part 340.

[0080] Steps S710-S730 can be performed after steps S610 and S620. The order of steps S710-S730 and steps S630-S650 can be interchanged.

[0081] According to S710-S730, it is suitable for scenarios that simulate indoor operation, that is, scenarios with both indoor and outdoor ambient light.

[0082] In some embodiments, step S710 includes adjusting the brightness of the outdoor ambient light source 321b, the brightness of the indoor ambient light source 321a, and the apertures 323a and 323b in the ambient light source simulation unit 320 to achieve an illuminance of 200±10 lx at the sample 301. In this embodiment, by achieving an illuminance of 200±10 lx, a regularly changing indoor ambient light can be simulated. Specifically, "regular change" here refers to frequency variation. For example, fluorescent lamps flicker, which is imperceptible to the human eye. Indoor ambient light actually flickers, and this flickering may trigger the operation of AWF products. Therefore, when designing AWF products, it is necessary to avoid the situation where false triggering occurs due to flickering. The ambient light source simulation unit 320 of this application can simulate flickering indoor ambient light, simulating a real working environment with ambient light interference, which is beneficial for more accurate testing of the sensitivity of the sample.

[0083] In some embodiments, when testing sample 301, steps S630 and S640, or steps S710 and S720, can be repeated to observe whether sample 301 can work normally.

[0084] Using the sensitivity measurement device and method of this application, it is possible to test whether the sensitivity of an AWF is good or bad under the condition of ambient light interference. The measurement device and method are simple, low cost, simulate the environment realistically, and provide accurate test results, thus providing a practical solution for AWF sensitivity testing.

[0085] This application uses specific terms to describe embodiments of the application. Terms such as "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0086] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned. In fact, the embodiments have fewer features than all the features of the single embodiments disclosed above.

[0087] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in this application are approximate values, which may be changed according to the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit preservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this application are approximate values, in specific embodiments, such numerical values ​​are set as precisely as feasible.

Claims

1. A sensitivity measuring device for an automatic dimmable welding filter, characterized in that, include: Trigger light source, used to simulate and provide welding arc light; An ambient light simulation unit is used to simulate and provide ambient light. A reflector is used to reflect ambient light so that the ambient light reaches the front surface of the sample. The reflector includes a light-transmitting part and an opening / closing part. When the opening / closing part is in a closed state, the light-transmitting part is blocked and the welding arc light cannot pass through the light-transmitting part. When the opening / closing part is in an 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.

2. The sensitivity measuring device as described in claim 1, characterized in that, The ambient light source simulation unit includes an ambient light source, a diffuser plate, and an aperture. 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 aperture is used to adjust the illuminance of the ambient light.

3. The sensitivity measuring device as described in claim 1, characterized in that, 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. The indoor ambient light source includes a fluorescent lamp, and the outdoor ambient light source includes an incandescent lamp.

4. The sensitivity measuring device as described in claim 1, characterized in that, The triggering light source includes a xenon arc lamp.

5. The sensitivity measuring device as described in claim 4, characterized in that, The trigger light source also includes a driving circuit for driving the xenon arc lamp. The driving circuit includes a processor and is used to modulate the light emitted by the xenon arc lamp using a reference signal so that the light emitted by the xenon arc lamp meets a preset spectrum. 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 measuring device as described in claim 5, characterized in that, The driving circuit also 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 and light up the xenon arc lamp, and to continuously output the reference signal after the xenon arc lamp is lit, so that the xenon arc lamp continues to emit light.

7. The sensitivity measuring device as described in claim 1, characterized in that, The opening and closing part includes a shutter.

8. The sensitivity measuring device as described in claim 1, characterized in that, The sample is placed on a platform, and the reflector is tilted on the platform.

9. The sensitivity measuring device as described in claim 1, characterized in that, It also includes a sample holder for placing the sample, and the sample holder is at a distance from the trigger light source such that the illuminance of the welding arc light at the sample is 132±10lx.

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