Detection device, detection system, transmission line, and detection method

A detection system comprising:

• a detection device;
• and
• a switching device,
• the detection device performing a detection process that includes outputting a measurement signal having a frequency component to a transmission line, receiving, from the transmission line, a response signal including a signal in which the measurement signal is reflected, measuring at least one of an amplitude and a phase of the received response signal, calculating an evaluation value based on a measurement result, and detecting a partial damage of the transmission line, based on the calculated evaluation value,
• the switching device performing a process of switching a state of an end, different from an input end for the measurement signal, of the transmission line, between a normal state where the detection device is allowed to communicate with another device via the transmission line, and a test state where the detection device is allowed to perform the detection process, wherein
• the process of switching the state of the end to the test state is at least one of a process of switching to a state where the end is open, a process of switching to a state where the end is connected to a ground node, and a process of switching to a state where the end is connected to a load for a test,
• the detection device transmits a control signal to the switching device via the transmission line, and
• the switching device performs the process of switching the state of the end to the test state, according to the control signal received from the detection device.

A transmission line comprising:

• a cable part;
• and
• a connector part provided at a first end of the cable part,
• the connector part including a switching device configured to perform a process of switching a state of the first end between a normal state where communication via the transmission line is allowed, and a test state where a test of the transmission line is allowed, wherein
• the process of switching the state of the first end to the test state is at least one of a process of switching to a state where the first end is open, a process of switching to a state where the first end is connected to a ground node, and a process of switching to a state where the first end is connected to a load for the test.

A detection method in a detection device, comprising:

• outputting a measurement signal having a frequency component to a transmission line;
• receiving, from the transmission line, a response signal including a signal in which the measurement signal is reflected, and measuring at least one of an amplitude and a phase of the received response signal;
• and
• performing a detection process of calculating an evaluation value based on a measurement result, and detecting a partial damage of the transmission line, based on the calculated evaluation value, wherein
• the performing the detection process includes performing a process of switching a state of an end, different from an input end for the measurement signal, of the transmission line, between a normal state where the detection device is allowed to communicate with another device via the transmission line, and a test state where the detection device is allowed to perform the detection process,
• the process of switching the state of the end to the test state is at least one of a process of switching to a state where the end is open, a process of switching to a state where the end is connected to a ground node, and a process of switching to a state where the end is connected to a load for a test, and
• the performing the detection process includes transmitting a control signal for switching the state of the end via the transmission line, as the process of switching the state of the end to the test state.

A detection device comprising:

• a signal output unit configured to output a measurement signal having a frequency component to a transmission line;
• a measurement unit configured to receive, from the transmission line, a response signal including a signal in which the measurement signal is reflected, and measure at least one of an amplitude and a phase of the received response signal;
• and
• a detection unit configured to perform a detection process of calculating an evaluation value based on a measurement result obtained by the measurement unit, and detecting a partial damage of the transmission line, based on the calculated evaluation value, wherein
• the detection unit performs a process of switching a state of an end, different from an input end for the measurement signal, of the transmission line, between a normal state where the detection device is allowed to communicate with another device via the transmission line, and a test state where the detection device is allowed to perform the detection process,
• the process of switching the state of the end to the test state is at least one of a process of switching to a state where the end is open, a process of switching to a state where the end is connected to a ground node, and a process of switching to a state where the end is connected to a load for a test, and
• the detection unit transmits a control signal for switching the state of the end via the transmission line, as the process of switching the state of the end to the test state.