Ask the automation professional expert to help the little brother solve the problem!!

I studied automation, but this involves too many aspects to explain! I'll leave a name to see how the master is.

I'll try to talk about the temperature: let's start with the common room temperature range (minus 40 degrees to plus 150 degrees – I don't think so, not accurate) sensors.

It can be used in almost all civilian products. Temperature control of rice cookers, water heaters, and air conditioners, temperature measurement of advanced charger batteries, temperature measurement of CPU on the motherboard, and alarm clocks with temperature displays, as long as the manufacturers and units of these products use temperature sensors.

In addition, there are room temperature sensors in boilers, fermentation, chemical production and other equipment, but the accuracy, stability, anti-interference and other aspects are not of the same order of magnitude as the aforementioned civilian products.

High temperature, industrial use. Smelting monitoring equipment (thousands of degrees, very fun), boiler furnaces, automobile engines, smaller ones such as temperature control welding stations, etc.

For low temperatures, the first is the refrigerator, and then the scientific research instruments, low temperature control equipment, etc.

I am doing electronic research and development, I have been in contact with a lot of component sales, generally they know more than me, but they are very shallow (this is inevitable, broad and shallow, specialized and refined!). If you are just starting to do sales, you can first contact some old customers to see how their sensors are used. Sometimes you can pull down your face and directly call the manufacturer you don't know, ask them what sensor they need, and then sell it to them, and don't call the purchasing department, but directly call the person in the R&D department - statement:

As developers, I hate doing this, and it makes us developers feel like they're being used and interfering with the project.

But since I have your problem, I want to be objective, so I still have to say this trick.

I can't tell you all about it, because you're asking too much. I don't expect you, but if you can, can you get me a few free room temperature range sensors to play with (LM35DZ, DS18B20 are good), it's a sample. Above!

You may be selling temperature, pressure, flow, material (liquid) level or analytical instruments, which mainly depends on your customer base, which means that your product is suitable for the chemical industry, biopharmaceutical industry or petrochemical industry, which is very important. Siemens instrument sales are divided by industry, he will first ask you what company you are, what industry you belong to, so that you have a target. Because different industries have different requirements for instruments!

Your company has no professional training.

The best way for you is to see where your old salesmen sell.

Generally, it takes 2-3 months to have a basic understanding of the target customer group.

The real road begins.

Function introduction Three-terminal voltage regulator integrated circuit is also known as three-terminal voltage regulator tube, it looks like an ordinary transistor, and the three-terminal voltage regulator integrated circuit commonly seen in electronic products has 78 series of positive voltage output and 79 series of negative voltage output. As the name suggests, a three-terminal IC means that the integrated circuit used for voltage regulation has only three pinouts, which are the input, output, and ground. Orient the identified side of the component towards you, in the case of the 78 series, the three pins are the input, ground, and output; In the case of the 79 series, the three pins are ground, input, and output.

There are very few external components required to use the 78 79 series three-terminal regulated IC to form a regulated power supply, and there are overcurrent, overheating and adjustment tube protection circuits inside the circuit, which is reliable, convenient and cheap to use. The number after 78 or 79 in this series of integrated regulator IC models represents the output voltage of the three-terminal integrated regulator circuit, such as 7806 indicates that the output voltage is positive 6V, and 7909 indicates that the output voltage is negative 9V. Sometimes there is an M or L after the number 78 or 79, such as 78M12 or 79L24, which is used to distinguish the output current and package form, etc., among which the maximum output current of the 78L series is 100mA, the maximum output current of the 78M series is 1A, and the maximum output current of the 78 series is 1 5A.

They are also available in a variety of packages, which vary depending on the placement of the components. In practical applications, a sufficiently large heat sink should be installed on the three-terminal integrated voltage regulator circuit (of course, not in the case of low power). When the temperature of the regulator tube is too high, the regulation performance will deteriorate or even be damaged.

Where to find the topic?,It's so difficult.。。。

As far as I understand it, an automated system is a system that is designed by humans to operate according to the design intent without human involvement. These few sections of the circuit, digital, electro, model, electricity and microcomputer principle are the knowledge of the hardware platform you realize the control function, programming is the knowledge of software, of course, the microcomputer principle also involves assembly language, and the principle of automatic control is to introduce the fundamental idea and control method of control. That is to say, the principle of automatic control introduces the method of control, such as open-loop or closed-loop control, while the circuit number electro-model and so on tells you how to implement this method.

In practice, it can be said that the vast majority of factories use automatic control to a greater or lesser extent. I haven't studied operations research, and I don't have a voice.

I'm a chemistry student, so help ask someone else!

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The temperature hysteresis is the largest, and I usually use DCS or PLC to make PID