What is a central collision sensor

What is a central collision sensor?

The central collision sensor is also called the central acceleration sensor.
Detect the deceleration when the car collides, and determine whether to detonate the gas generator according to the magnitude of the collision deceleration.

What is the branch current method?

Any circuit that cannot be simplified by the equivalent transformation of resistors in series and parallel is generally called a complex circuit.
For complex circuits, we can use KCL and KVL to derive various analysis methods, and branch current method is one of them.
Branch current method: take the current of each branch in the circuit as the unknown quantity. Then apply Kirchhoff’s current law and voltage law to list the required equations for nodes and loops respectively, and then solve each unknown branch current. For any complex circuit, if the current of each branch is the unknown quantity. To use KCL and KVL to write equations, you must first select the reference direction of the unknown branch current and voltage or electromotive force on the circuit diagram.

What are the two special features of Rl4 in terms of structure?

1. When using the BL instruction to call the subroutine, the return address will be automatically stored in Rl4.
2. When an abnormal interruption occurs, care should be taken to ensure that the exception handler will not destroy the LR. Because LR saves the return address of the exception handler, that is, saves the return address of the exception handler to the exception mode register corresponding to LR. The return after completion of the exception handler is achieved by writing the value of LR to the PC while restoring the CPSR from the SPSR register.

What is the detection method of the switch contact throttle position sensor?

• General inspection.
• Open circuit detection method.

What are the main features of ZigBee technology?

Low cost, economical transmission speed, network topology.

What are the main threats to cybersecurity?

• The security threats faced by computer networks are various. The main threats can be divided into four categories: the impact of harsh environments, accidental failures and errors, human attack and damage, and computer virus infection:
  1. Computer virus: Computer virus is able to spread through a certain medium or network, lurking in the computer storage medium (or program). A set of programs or instruction sets that are activated when certain conditions are met and have a destructive effect on computer resources.   All programs that can cause computer failures and destroy computer data are collectively called computer viruses. Then worms, Trojan horses, malicious web scripts, email viruses and hacker attack programs are all computer viruses.  Computer viruses have basic characteristics such as infectivity, concealment, latentness, destructiveness, pertinence, derivation, parasiticity and unknownness.
  2. Network attack: Generally, the methods of network attack can be divided into the following two categories. ①Passive attack: refers to the intrusion of the attacker into the network system, only to understand the internal structure and data of the network system. Or the attacker observes and analyzes the data units transmitted externally, and understands the address, identity, and nature of the communication without interfering with the information flow. This attack is imperceptible. ②Active attack: Refers to attackers intruding into the network system and destroying the functional structure and internal data of the network system. Or the attacker performs various processing on the intercepted externally transmitted data unit, such as selectively changing, deleting, or even sending forged data to the connection. Common network attack methods include: attack by exploiting network system vulnerabilities; attack by email; decryption attack: backdoor software attack; denial of service attack, etc.

What should I pay attention to when conducting wireless environment testing?

1. It is not necessary to measure every floor (measuring every 4 to 6 floors for buildings with the same structure).
2. Non-standard floors must be tested for each floor (for floors with different building structures, each floor must be tested).
3. It is not necessary to perform a frequency sweep test in areas where there is no signal (e.g. elevators, parking lots, etc.).

What is cluster computing?

It is a parallel collection of processing nodes.
Grid computing, with communication and distributed network management mechanisms.
Ultimately funneling information all the way to the Legion, think of it as a kind of integrated global computer.

What are the integrated sensitive units?

The integrated sensitive unit includes elastic sensitive elements and transducers.

What are the advantages of noninvasive detecting sensors?

Non-invasive detection sensors are mostly indirect measurements.
Should have higher sensitivity and accuracy, with higher anti-interference performance and signal-to-noise ratio.