The importance of various types of sensors on the Shenzhou 9 rocket

On June 16, 2012, the manned spacecraft Shenzhou 9 was successfully launched. What preparations do you need to make before launching? What role does the various types of sensors and transducers on the rocket play? In the few seconds of vacant, is everything normal? When it is the most critical time, has it come to a critical moment that the escape procedure must be initiated to ensure the safety of astronauts? All these problems depend on various types of sensors.

Most of the rocket's various types of sensors are mounted on key parts of the rocket. Small sensors are insignificant on large rockets, but they play a vital role. Using the system liquid level sensor, it can measure the remaining amount of the propellant level measurement, provide real-time, continuous and accurate information on the remaining level of the propellant, control the engine regulating valve to open or close, and monitor the propellant mixture ratio flowing to the engine. Keep the oxidizer and combustion agent mass ratio in the tank within the optimal range.

Vibration and noise do not seem to be destructive at ordinary times, but the destructiveness caused by high-speed flight is enormous. Therefore, a special sensor for monitoring vibration and noise is also set on the rocket so that the vibration and noise generated during the rocket flight can not exceed the level that the human body can accept, and the astronauts' riding comfort can be improved.

It is important to use emergency escape tools during the takeoff of the rocket. This decision will depend on the acceleration sensor. If there is a serious failure of the rocket and endangers the safety of the astronaut, it will manifest itself as a deviation of the acceleration from the design value. The sensor will sense this change for the first time and send a signal to initiate the escape procedure. Help astronauts quickly emerge from danger.

There are many kinds of sensors on the rocket. The working principle is capacitive, resistive, and photoelectric. The measured parameters include pressure, displacement, and strain. The monitored physical quantities include acceleration, position, temperature, noise, vibration, and so on. But don't underestimate these sensors. In an emergency, these sensors will be the decisive factor. They can sense changes in the physical quantity on the arrow. The transformer is responsible for converting physical quantities into electrical signals for transmission. The rocket control system and the ground control center serve as the basis for judgment, just as the changes in the eyes are closely related to the indicators, and they are predictive for the command center. Provide evidence.