introduction
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The tanker is a liquid volume measuring system that adds fuel to motor vehicles. It can have functions such as IC card refueling and oil and gas recovery. The tanker used for domestic oil trade settlement should have tax control function and anti-spoofing function. The current scheme uses a photoelectric encoder and a monitoring microprocessor to cooperate with each other. Each time the fuel is refueled, the microprocessor compares the oil quantity data sent by the encoder ciphertext with the oil quantity data sent by the metering party to see if it exceeds the allowable precision range. If the error range is exceeded, the relevant information is recorded and displayed, and the microprocessor will prohibit the refueling machine from refueling. However, based on the safety requirements of the tanker system, it is necessary to design an explosion-proof, anti-cheating, fully sealed encoder device, and can work in a harsh oil and gas environment, which makes the application of the photoelectric encoder have certain limitations.
With a resolution of up to 16 bits, the Avago AEAT-6600-T16 magnetic encoder provides accurate angle measurement over a full 360-degree range. The use of magnetic technology in motion control and remote sensing activities enables non-contact operation from mechanical wear. The encoder is a system-on-a-chip that integrates integrated Hall elements, analog front ends, and digital signal processing in a single device. With this high level of integration, the encoder has built-in programmability with customizable encoder settings, saving customers significant encoder inventory. The AEAT-6600-T16 can work in harsh oil and gas environments and meet the explosion-proof, anti-cheating, and fully sealed design requirements of tankers. This article gives a brief introduction to AEAT-6600-T16.
First, AEAT-6600-T16 magnetic encoder
1. Feature introduction
The AEAT-6600-T16 is equipped with an absolute encoder function and an incremental encoder function. The absolute encoder function can be selected from four resolutions of 10, 12, 14, and 16 bits, including the right turn/left turn, etc., and the user can use the OTP (one time programmable) function to set. The incremental encoder function can use the OTP function to set 8 resolutions and 4 origin signal widths. Four working modes can be set by setting different combinations of three pins ALIGN, PROG and PWRDOWN, as shown in the figure below.
AEAT-6600-T16 integrates Hall element, analog front end and digital signal processing functions. It has two modules, absolute encoder and incremental encoder. The block diagram is as follows.
2. Output signal
After programming different operating modes, the AEAT-6600-T16 can output the following four pulse signals:
2.1. SSI signal output
2.2 ABI signal output
2.3. UVW signal output
2.4. PWM signal output
3. AEAT-6600-T16 application peripheral schematic
Second, the application of AEAT-6600-T16 in the tanker system
AEAT-6600-T16 magnetic encoder can realize the output of position signals A, B and I in the system. After the flow signal is converted by the encoder, it is directly converted into oil quantity data, encrypted and sent to the monitoring MCU and metering MCU. Perform data processing.
The AEAT-6600-T16 Hall-effect magnetic encoder can be used in harsh oil and gas environments and meets the design requirements for explosion-proof, anti-cheating, and full-sealing design of fuel dispensers. The encoder enables high-precision, high-rate signal detection with built-in programmability, which saves the encoder inventory and reduces the design size and design difficulty. Advanced positioning information for demanding industrial applications such as non-contact rotary position detection, robotics, motor feedback and valve control, and medical applications.
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