When installing a ground induction coil for the door op […]
When installing a ground induction coil for the door opener, you need to pay special attention to the material of the coil, the shape of the coil, and even the number of turns of the coil.
Under ideal conditions (regardless of the influence of all environmental factors), only the area (or circumference) and the number of turns are considered when embedding the inductance coil for the sliding door operator, and the material of the wire can be ignored. However, in actual engineering, the mechanical strength of the wire and the high and low temperature anti-aging issues must be considered, and the acid and alkali corrosion resistance must also be considered in some places with harsh environments. Once the wire is aging or the tensile strength is not enough to cause the wire to be damaged, the detector will not work normally. In actual projects, it is recommended to use Teflon high-temperature flexible wires over 1.0mm.
Usually the detection coil should be rectangular. The two long sides are perpendicular to the direction of movement of the metal object, and the distance between each other is recommended to be 1 meter. The length of the long side depends on the width of the road, and the distance between the two ends is usually 0.3m to 1m narrower than the distance between the roads.
In order to make the detector work in a good condition, the inductance of the coil should be kept between 100uH?-300uH. When the inductance of the coil remains unchanged, the number of turns of the coil has an important relationship with the circumference. The smaller the circumference, the more turns. As there may be various cable pipelines, steel bars, sewer covers and other metal materials buried under the road, these will have a great impact on the actual inductance of the coil, so the data in the above table is for user reference only. In the actual construction, the user should use the inductance tester to actually test the inductance value of the inductor coil to determine the actual number of turns in the construction, as long as the final inductance value of the coil is within a reasonable working range (for example, between 100uH-300uH).