Afraid of buying water-injected pork when going to the vegetable market, not wanting to change shoes when visiting a friend’s house, the car breaking down on the highway, but finding no safety warning signs... These are the troubles that people often encounter in daily life. Shen Changsheng's little invention was easy to solve. This retired physics teacher in his 60s is keen on inventions and creations. He currently has hundreds of inventions, big and small, of which more than 20 have obtained national invention patents. Shen Changsheng said with a smile that his invention embodies the principle of "three closenesses": close to life, close to the masses, close to reality, discovering problems in life, and creating inventions in life.
Reflection on car accidents
Reflective panels create warning signs
In 2006, Bashu comedian Li Yongling died on the highway. The reason was that driving The crew failed to place a warning sign behind the disabled vehicle in time. "I was thinking, with so many people dying in secondary car accidents every year, why are no one willing to carry warning signs with their cars?" After careful investigation, Shen Changsheng found that some warning signs were bulky and inconvenient to carry, and he came up with an idea: Can you invent a warning sign that is easy to carry, lightweight and durable?
Shen Changsheng was inspired by the reflectors used in photography. He found a red filter and a roll of thick steel wire. After several experiments, two portable traffic warning signs finally took shape: one is with a cone structure, When opened, the shape is no different from the common conical buckets on the street. When not in use, it shrinks into a round bag shape with a diameter of 20 cm; the other is composed of three circles with warnings made of reflective materials pasted on them. logo. "This portable warning sign is small in size, easy to carry, folds like a raincoat bag, and has good reflective properties." Shen Changsheng said that the invention has passed the preliminary review of the National Patent Office.
Whether water has been injected?
You will know with just one prick of the test pen
"Teacher Shen, please help me identify whether this piece of meat has been filled with water." Often A neighbor made a request to Shen Changsheng. As a physics teacher, Shen Changsheng used his professional expertise to make use of the characteristic that the water content of pork will change the resistance. He used the simplest electronic components to create a water-injected pork detection pen, and obtained a national utility model patent certificate.
This kind of pen looks about the same size as an electric pen. The difference is that the front contact point is made of two steel needles. When using, the steel needles can be inserted into the pork. If the moisture content of the pork exceeds the standard, the detection pen will display a red light and the operation is very simple. Shen Changsheng is currently improving the detection pen and trying to add the function of identifying counterfeit banknotes. In this way, with a "pen" in hand, not only can the water-injected pork "hit the nail on the head", but it can also make counterfeit money nowhere to hide.
Don’t change into slippers
Every time you step in the door, it’s spotless
“Should you take off your shoes?” This is a problem that most people encounter when visiting other people’s homes. Although some people have slippers, they are not cleaned for a long time, and it is not hygienic when people come and go. Shen Changsheng believed that when people enter a room from the outside, shoe soles are the main source of pollution, so the dust-collecting shoe sole cleaning machine he developed came into being. Guests only need to step on this machine before entering the door, and the soles of their shoes will be spotless after being cleaned, and all the dust will be collected into a closed box, which is convenient and practical.
Lifelong wish
Let children fall in love with technology
After graduating from a normal school in 1965, Shen Changsheng has been engaged in teaching in Chengdu Liewu Middle School for many years. Won numerous awards. In 2007, his work "New Technology Plan for Magnetoelectric Experimental Demonstration" also won the first prize in the National Science and Technology Counselor Science and Education Innovation Competition.
Shen Changsheng, who had reached retirement age, was re-employed by the school as an exception, and he was given two large classrooms as laboratories. "Cultivating students' interest in science and technology is the real quality education." Shen Changsheng said that this is also the real motivation for him to persist in invention.