Speed Sensor Data Transmission Block Status Register
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current magnetic speed sensor systems face complete loss of data transmission blocks due to current supply interruptions, leading to incomplete data transmission to the electronic control unit (ECU), especially during microbreak events or electrostatic discharges.
Innovation Solution
Incorporating a transmission block status register to store a bit indicative of whether a data transmission block has been triggered, allowing the sensor circuit to detect interrupt events and avoid complete loss of data by resuming transmission based on the bit value, ensuring that data blocks are completed even after interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor uses current modulation protocol for data transmission, then the data transmission can be optimized for different protocols, but complete loss of transmission blocks occurs during supply interruptions
Solution Approach 1:
The sensor circuit sets a status bit in advance to indicate whether a transmission block has been triggered, so that when an interrupt occurs, the status information is already prepared and can be used to determine whether to retransmit the block after interruption
Solution Approach 2:
The sensor circuit uses the status bit as feedback information to determine the appropriate action after an interrupt. By checking the status bit value, the circuit can decide whether to repeat the transmission block, ensuring reliable data transmission without complete information loss
2Speed
If the protocol is interrupted immediately after triggering, then the sensor can respond quickly to interrupts, but the complete protocol is lost and not transmitted to the ECU
Solution Approach 1:
The status bit is set preliminarily when the transmission block is triggered, before any interruption occurs. This preliminary action ensures that when an interrupt happens, the status information is ready to guide the resumption of transmission
Solution Approach 2:
The transmission block is resumed continuously after interruption based on the status bit indication. The useful action of transmitting protocol data is continued rather than restarted from beginning, maintaining efficiency while ensuring completeness
3Reliability
If the sensor repeats the complete protocol after interruption, then data transmission reliability is improved, but transmission time and energy consumption increase
Solution Approach 1:
Instead of repeating the complete protocol, the sensor circuit performs partial action by only repeating the necessary transmission block based on the status bit. This partial repetition approach maintains reliability while minimizing time and energy consumption
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents the complete loss of data transmission blocks during supply interruptions, ensuring reliable data transmission to the ECU and maintaining system integrity by resuming transmission correctly after interruptions.
Implementation Method 1
at least one sensor element configured to generate at least one sensor signal based on magnetic field that is modulated by the rotation of the object
Data Source
AI summary
A magnetic sensor configured to detect a rotation of an object includes at least one sensor element configured to generate at least one sensor signal based on a magnetic field that is modulated by the rotation of the object; a sensor circuit configured to generate a data transmission signal based on the at least one sensor signal, wherein the data transmission signal comprises a plurality of data transmission blocks; and a memory configured to store transmission block status information indicative of whether or not one of the plurality of data transmission blocks has been triggered for transmission. The sensor circuit is configured to detect an interrupt event that disrupts the transmission of the data transmission signal and avoid a complete loss of a data transmission block due to the detected interrupt event based on the transmission block status information present at a time the interrupt event is detected.