The world's first metal detector was born in 1931, and was patented by Dr. Fisher, Gerhard R. Fisher, in the Fisher Lab in Palo, California, and was named Metalloscope (M-scope). The patent in the United States Patent and Trademark Office, the patent number is US002066561, in the European Patent database published patent number of US2066561 (A). In this respect, Bruce B. Abbott in the "hidden-metal detector" in the article, his grandfather Raymond B. Abbott employed by Kraufertswil businessman Shirl Herr, in 1924 to create the prototype of metal detectors, And in 1927, an improvement was made, unless Fisher could come up with evidence of a metal detector earlier, or the father of the metal detector should be at least shirl Herr. Bruce B. Abbott admits Fisher was the first to market a metal detector, but refused to admit he was the father of a metal detector. However, because Fisher applied for a patent first, and the metal detectors to market, widely used in mineral exploration, forensic detection, industrial detection, treasure detection and other fields, the community still recognized Dr. Fisher as the father of metal detectors.
Metal detection security Door was born in 1960, entered the Industrial age of the original metal detectors are mainly used in the mining industry, is to check mineral purity, improve efficiency of the right-hand men. With the development of society, crime cases rise. The 1970 metal detectors were introduced into a new area of application-the security check, the prototype of the metal detector security we used today, which means that the human perception of security has entered a new era.
The emergence of a product led to the development of an industry, so security is unfamiliar and familiar with the industry began to enter the market. Over more than 50 years later, metal detectors have undergone several generations of detection technology changes, from the initial signal simulation technology to the continuous wave technology to today's use of digital pulse technology, metal detectors simple magnetic field cutting principle has been introduced into a variety of scientific and technological achievements. Whether it is sensitivity, resolution, detection accuracy or work performance has a qualitative leap. The application field also extends to many industries with the improvement of product quality.