#Show it off# What sensors have you used? Which ones are made in China?

nmg

#Show it off# What sensors have you used? Which ones are made in China? [Copy link]

 

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As the title says, as the title says, this vast world of sensors

Which sensors have you actually handled?

Which ones are made in China?

What are the pitfalls, problems and challenges encountered during use?

Which sensors are you interested in playing with?

Welcome to share your thoughts~

秦天qintian0303

This is too much, temperature and humidity, pressure, ultrasound, differential pressure, CO2, oxygen, NO, infrared, etc. The engineer has to come up with a lot of

damiaa

Temperature and humidity SHT30, I don’t remember the model of the gas sensor,

PM2.5 is made of climbing vines.

Infrared receiver and transmitter, I don’t remember the specific model, but they are made in China.

Thermocouple sensor, max6675 acquisition or something like that...

I used a strain sensor a long time ago, but I can't remember the model.

. . .

Thank you for the points you gave.

nmg

Qintianqintian0303 posted on 2024-7-5 09:20 This is too much, temperature and humidity, pressure, ultrasound, differential pressure, CO2, oxygen, NO, infrared, etc., the engineer has to make a lot of them

It feels really common. You have done it before. Is it required for product design?

aramy

Let's talk about temperature sensors! DS18B20 and DS1825 are both from Maxim, single bus temperature sensors. SHT30, an I2C interface temperature sensor, is also from abroad.

The domestically produced temperature sensor used is Nanochip's NST112X temperature sensor, which has an I2C interface and is very small in size.

beyond_笑谈

Domestically produced sensors are not used often. The angle and travel sensors used in the previous assisted steering system were domestically produced, but the chips inside were not domestically produced.

beyond_笑谈

In terms of actual sensor models, LM35 has been used in actual products (to collect temperature in the cabinet of the communication power system, and to collect temperature in the snow melting sensor and controller), slot-type photoelectric switch to collect motor speed, Asahi Kasei's Hall sensor to collect DC brushless motor speed, homemade capacitance detection sensor (using AD7746), homemade water quality detection sensor (TDS), etc.

In actual use, it is troublesome to use AD7746 to collect capacitance values because the signal is easily affected by parasitic parameters.

秦天qintian0303

nmg posted on 2024-7-5 10:33 It feels quite common. Have you done it? Is it required for product design?

Yes, there are basically several sensors of the same type, especially in the selection stage.

nmg

beyond_笑谈Published on 2024-7-5 14:22 In terms of actual sensor models, LM35 has been used in actual products (collecting temperature in cabinets of communication power supply systems, collecting temperature in snow melting sensors and controllers) ...

How do we generally deal with parasitic parameters?

beyond_笑谈

nmg posted on 2024-7-5 17:05 How do you usually deal with parasitic parameters?

Just talking about the capacitance detection project, the capacitance value being measured is at the pf level. The circuit that originally used MOSFET switches was finally replaced with a long-life electromagnetic relay and the switching frequency was reduced.

beyond_笑谈

nmg posted on 2024-7-5 17:05 How do you usually deal with parasitic parameters?

If it is a conventional circuit, assuming that the schematic diagram remains unchanged, the parasitic capacitance and inductance can be improved by adjusting the PCB layout, such as reducing the wire length and reducing the current loop. Of course, you can also replace components, adjust the switching frequency, improve the on and off current, etc.

lugl4313820

This is too much, temperature and humidity, pressure, ultrasound, differential pressure, CO2, oxygen, NO, infrared, etc. The engineer has to come up with a lot of +1

lugl4313820

In fact, the first gas sensor I used was a domestically produced one, the one with a single bus. It took me a long time to learn how to use it.

nmg

lugl4313820 posted on 2024-7-6 11:44 In fact, the first gas sensor I used was a domestically made one, the one with a single bus. It took me a long time to learn how to use it.

Which one? What's the main difficulty?

吾妻思萌

The first one I used seemed to be a humidity sensor that came with the 89C51 microcontroller kit when I was in school.

It is used to detect the ambient humidity and then drive the click to rotate when the threshold is reached.