Port detection circuit and method
A port detection and port technology, applied in the direction of electrical components, line transmission components, line transmission monitoring/testing, etc., can solve the problems of difficult operation and long detection time, and achieve the effect of simple and convenient operation and short detection time
Active Publication Date: 2022-03-11
BEIJING TASSON SCI & TECH CO LTD
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[0003] Based on this, it is necessary to provide a port detection circuit and method for the problems of long detection time and difficult operation
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[0028] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail through the following embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.
[0029] The serial numbers numbered for components in this document, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequence or technical meaning. The "connection" and "connection" mentioned in this application include direct and indirect connection (connection) unless otherwise specified. In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "i...
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The invention relates to a port detection circuit and method. The port detection circuit comprises a first signal transmitting module, a second signal transmitting module, an echo cancellation circuit, a first switch, a second switch, a receiving module and a data processing module. And the first switch and the second switch are used for controlling the work of the echo cancellation circuit. And when the first switch and the second switch are switched off, the echo cancellation circuit does not work. At the moment, the first signal transmitting module and the second signal transmitting module are controlled to transmit signals. The first level of a signal is measured with the receiving module. And when the first port and the second port are in different connection states, the measured numbers of the first levels are different from each other. And the connection state of the first port and the second port at the moment can be judged according to the number of the first levels. An external detection circuit or an external test signal source is not needed, the operation is simple and convenient, and the detection time is short.
Description
technical field [0001] The present application relates to the field of vehicle Ethernet port connection state detection, in particular to a port detection circuit and method. Background technique [0002] The interface circuit of the vehicle Ethernet is composed of an Ethernet chip and a twisted pair socket. The signal transmission is realized through the physical connection between the twisted pair socket and the twisted pair. In order to detect whether two twisted pair ports are open or only one is open and whether there is a short circuit, in the traditional technology, there are mainly two methods for detecting the connection status of the ports. (1) Add a test signal source at the interface chip of the Ethernet physical layer, such as a time domain reflectometer TDR. (2) Add additional analog detection circuit. It takes a long time to detect the connection state of the port by using the traditional technology, and the operation is not easy. Contents of the inventio...
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IPC IPC(8): H04B3/46H04L25/02
CPCH04B3/46H04L25/0272Y02D30/50
Inventor 应子罡杨丽丽徐秀波张雄波刘银栋
Owner BEIJING TASSON SCI & TECH CO LTD