60s: I have a store

Chapter 304 Magnetoelectric Sensor
The advent of television brought a small shock to the courtyard house.

That night, many people came to Zhou Yimin's house and watched TV until the program ended.

At that time, TV stations were not on 24-hour broadcasts, and there were not that many programs to broadcast. Except for documentaries and science and education films, all other programs were live broadcasts.

In the past two years, I didn’t even watch TV every day.

Take Capital TV for example. During its trial run two years ago, it broadcast two programs a week, each lasting two to three hours, including news programs, social education programs, and cultural programs.

Zhou Yimin saw the current “No. 1 person on Chinese screen” - Shen Li.

It is said that during the first two years of Capital Television's establishment, there was only one announcer, Shen Li, who had to broadcast news, social education, literature, sports programs, and even live broadcasts of the Tiananmen Festival celebrations and large-scale literary and artistic evenings.

She created a dignified and generous television screen image.

After watching TV, many people still feel unsatisfied. After all, there are too few TV programs now and the broadcast time is not long every day.

"Yimin, come to my house for dinner tomorrow." The old man said to Zhou Yimin before he went back.

Zhou Yimin asked with a smile: "Is it an important festival?"

An old man said bluntly: "The barefoot doctor manual you told us about before has been compiled through everyone's efforts. It will be published within this month and will be popularized throughout the country, especially in rural areas."

This matter is a big deal in their medical field, and even great people have asked about it.

It is said that after listening to the report, the great man was very happy and demanded that a group of qualified barefoot doctors be trained as soon as possible to improve the medical and health level in rural areas and make it more convenient for rural people to see doctors and receive treatment.

"So fast?" Zhou Yimin was surprised.

"You have no idea how much manpower was mobilized to create the barefoot doctor manual as quickly as possible."

The uncle knew that almost all medical experts were involved, especially those experienced Chinese medicine practitioners. After all, Chinese medicine is easier to obtain in rural areas, which further reduces the difficulty for farmers to see a doctor.

After the barefoot doctor manual came out, an old man received a reward from above.

There is even a hospital that has invited him to work there. However, the old man has not yet made up his mind.

The steel mill has its advantages, and Director Hu promised him that he would promote him. Going to the hospital also has its advantages. From a long-term development perspective, it is definitely better to go to the hospital.

It is not easy to work in a hospital nowadays.

Without Zhou Yimin, he would not have been able to obtain these. Therefore, no matter what, he had to treat Zhou Yimin to a meal, and this favor was not over yet.

"Great." Zhou Yimin praised.

"What a pity! The quick-acting heart-saving pill has not been developed yet."

An old man has been researching a quick-acting heart-saving pill for the past two months, but he has tried many methods without success.

The two chatted for a while.

The next day, Zhou Yimin came to the steel plant. If nothing goes wrong, the sensor can be made today. It is too advanced and cannot be made with the level of their factory.

Airbag sensors are an important part of the car safety system and are mainly divided into two types: trigger collision sensors and protection collision sensors. Trigger collision sensors, also called collision intensity sensors, are used to detect acceleration changes during a collision and transmit collision signals to the airbag.

When a car collides, this sensor can detect the intensity of the collision and transmit a signal to the airbag computer to determine whether it is necessary to detonate the inflator element to inflate the airbag, thereby ensuring the safety of the driver and passengers.

Depending on the structure, collision sensors can be divided into electromechanical collision sensors, electronic collision sensors and mechanical collision sensors.

The electromechanical collision sensor controls the movement of electrical contacts through mechanical movement, and then controls the connection and disconnection of the airbag circuit by the opening and closing of the contacts.

Electronic collision sensors do not have electrical contacts. Currently, the two most commonly used types are resistive strain type and piezoelectric effect type.

The mechanical collision sensor uses the conductive property of mercury to control the connection and disconnection of the airbag circuit. This is the simplest and least technologically advanced type of sensor.

In fact, Zhou Yimin could have bought one from the store in his mind as a sample, but he couldn't explain it clearly, so he had to take the masters with him and make it himself.

What they made is a magnetoelectric sensor, which consists of a shell, magnetic material, an inertial body, a soft iron connected to the inertial body, a spring to support and adjust the displacement amplitude, a permanent magnet installed in a convex column connected to the shell, and a coil and lead wound on the soft iron.

The magnetoelectric sensor not only has a low error rate in the electronic identification circuit and a high and accurate reliability in sensing collision signals, but also can adjust the width of its sensing range through the standard hammer drop test to meet the reproduction of the pulses generated by the car collision, so it can be installed on any part of the car body.

Another thing is that it has a simple design and a low price, so it is no longer a prohibitive luxury for most car users.

"Yimin, do you think this will work?" Several masters came to Zhou Yimin with the sensors they had just made and asked them.

Zhou Yimin: "Let me try it out."

As for the materials of the airbag and the substance that produces gas, Zhou Yimin and his team have already solved it.

While Zhou Yimin and his colleagues were assembling and testing, several people came to the steel plant, accompanied by Director Hu and other leaders, and it looked like they were going to be something serious.

One of them saw Zhou Yimin and others testing and asked Director Hu in confusion: "What are they doing?"

The people who are in charge of their country's major secret project came to the steel plant to explore the steel plant's manufacturing level. Some things need to be built.

"A few days ago, the Ministry of Commerce asked our steel plant to develop an automobile airbag, which should be undergoing testing now. Do you want to go and take a look?" asked Director Hu.

"Go and have a look."

Airbags? As researchers, they were curious and felt it was new.

When I got closer, I heard a young man explaining something while testing it.

They listened to some of the contents and were surprised to learn that it was equipped with a magnetoelectric sensor.

"Comrade, are you talking about the magnetoelectric sensor?"

Sensors are also a part they are researching. The research and development work has been handed over to a research institute, but there is still no result!
Can a steel plant produce this?

Seeing Zhou Yimin's puzzled look, Director Hu quickly gave a brief introduction. In fact, the information he introduced was very limited, and even he didn't know the detailed origins of these people.

He only knew that the Minister of Industry asked the steel mills to actively cooperate with the work of these comrades and not to be negligent.

(End of this chapter)