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Anonymous users2024-02-11For general acoustic emission applications, the signal frequency band range is mostly between 25kHz and 750kHz, so resonant sensors are more suitable. Resonant narrowband sensors with a general broadband frequency of 150kHz are commonly used for metal materials and other applications; For acoustic emission signals such as corrosion and leakage, resonant sensors with a resonant frequency of 40kHz are commonly used; Due to the relatively low response sensitivity of wideband sensors in a wide frequency band, wideband sensors are selected for spectrum analysis. Qingcheng acoustic emission sensor is made of high-quality stainless steel material, and the overall shielding design can effectively reduce interference; It is suitable for bridge wire fracture monitoring, valve pipeline leakage monitoring, tool wear monitoring, wind power equipment monitoring, rotating equipment acoustic emission monitoring, structural parts damage monitoring, storage tank floor acoustic emission monitoring.
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Anonymous users2024-02-10If an alternating current is passed through the circle, a magnetic flux is generated, and if a metal object is passed, an eddy current is generated in the object to emit a magnetic flux to prevent this change. As a result, the induction of the coil will change. The amount of change in this induction is a function of the distance between the coil and the object, and as a result, the distance displacement of the object can be measured.
The ultrasonic displacement sensor sends ultrasonic waves to the object from the oscillator and receives the reflected waves through the receiver. A method of calculating distance by calculating the relationship between the time it takes for an ultrasonic wave to be sent to it and the speed of sound. This page is a description of the terms used in optical linear sensors.
For terms of sensors using other methods and principles, please refer to the listing page for each model. The error of the linear output relative to the ideal straight line.
It is usually compared to the full scale (FS) and expressed as a percentage, e.g., 1% FS....
Temperature characteristics. The amount of linear output fluctuation corresponding to changes in ambient temperature.
It is usually expressed as %FS when compared to the full scale (FS). Example) The figure below shows the general relationship between displacement, response time, and resolution.
If you want to measure the displacement correctly, postpone the setting of the response time.
Responsiveness is reduced).
When you want to get fast response time, set the fast response time.
At this point, the resolution is reduced).
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Anonymous users2024-02-09Proximity sensor is a general term for sensors that are used to detect the object without touching the detection object instead of contact detection methods such as limit switches. It can detect the movement and presence of objects and convert them into electrical signals. Among the detection methods that are replaced with electrical signals, there are methods that use the eddy current generated in the metal body of the detection object caused by electromagnetic induction, the method of changing the capacity of the electrical signal caused by the proximity of the measuring body, and the method of turning stones and guiding switches.
And if the contact is too frequent, maybe she will put you on the blacklist, and she won't be able to see the messages you send >>>More
Actually, I'm really afraid of hurting you when I say this, and I can clearly see from your account that this girl has no feelings for you. When I was in school, I was in a similar situation to you. Two suggestions for you: >>>More
WiFi signal belongs to electromagnetic waves, it is actually not essentially different from mobile phone signals, all belong to the microwave band in electromagnetic waves, generally located in the 800 MHz-2500 MHz band, there is no really strong scientific basis to show that it will destroy human DNA or protein structure, thereby affecting human health. The main effect of WiFi signals on the human body is the thermal effect. The thermal effect is mainly the friction and heat generation of polar molecules in living organisms under the action of microwave high-frequency electric field, which is mainly water in the human body. >>>More
How to say that the harm is certain, the main thing is that the transformer is pressed by silicon steel sheet in order to reduce iron loss, and the effect of electromagnetic force should produce uniform jitter, which is the buzzing sound that people hear, and there is the electric transformation of magnetism, which must be polluted by magnetic field, and the transformer oil may pollute the environment, of course, the risk of electric shock is the most terrifying!
There are a lot of people like you, but you should be very light, because you are willing to change, and that's fine, remember, just see others as well-intentioned, and at the same time spend more time with others and you can overcome it quickly.