Internet of things terminal capable of automatic adjusting launch power by using ultrasonic measured distance

Abstract

The invention discloses an internet of things terminal capable of automatic adjusting launch power by using an ultrasonic measured distance. The internet of things terminal capable of automatic adjusting the launch power by using the ultrasonic measured distance comprises a main control unit, a radio frequency unit and a memory unit, wherein the internet of things terminal capable of automatic adjusting the launch power by using the ultrasonic measured distance has an ultrasonic ranging program, a ultrasonic measured distance probe is installed in a housing on the back of the internet of things terminal, a launch window and a receiving window of the ultrasonic measured distance probe are exposed on the outer face of the housing on the back of the internet of things terminal, a radio frequency antenna is installed in the housing on the back of the internet of things terminal, and located below the ultrasonic measured distance probe, a main radiation direction of the radio frequency antenna is perpendicular to the surface of the back of the housing, and a launch direction of the ultrasonic measured distance probe is parallel to the main radiation direction of the radio frequency antenna. According to the internet of things terminal capable of automatic adjusting the launch power by using the ultrasonic measured distance, the ultrasonic measured distance probe is added on a prior hand type internet of things terminal, a whole machine can adjust the launch power automatically according to a target distance after matched with software, and labor intensity of operation personnel is reduced. And simultaneously, misreading to a distant target is avoided, and therefore usability of the whole machine and reliability of a system are increased.

Description

technical field [0001] The present invention relates to a hand-held Internet of Things terminal, in particular to an Internet of Things terminal that can automatically adjust transmission power by using ultrasonic distance measurement in fields such as electronic license plates and ETC. Background technique [0002] Handheld IoT terminals are widely used, but in the process of ETC, electronic license plate issuance, charging and other operations, the problem that the distance from the terminal transmitting antenna to the tag cannot be determined is often encountered, because the power of the transmitting antenna will affect the reading distance of the tag , When preparing to read the previous target, due to the short distance and excessive transmission power, the latter tag will be read at the same time, which may cause misreading. At this time, the user needs to control the distance from the transmitting antenna to the target to be read or manually reduce the transmitting p...

AI Technical Summary

Problems solved by technology

[0002] Handheld IoT terminals are widely used, but in the process of ETC, electronic license plate issuance, charging and other operations, the problem that the distance from the terminal transmitting antenna to the tag cannot be determined is often encountered, because the power of the transmitting antenna will affect the reading distance of the tag , when preparing to read the previous target, due to the short distance and excessive transmission power, the latter tag will be read at the same time, which may cause misreading

At this time, the user needs to control the distance from the transmitting antenna to the target to be read or manually reduce the transmitting power to avoid misreading, which brings great inconvenience to the user.

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