engines
AltSql Core and Six Prototypes Built Around It
AltSql Core is the engine the project started with. It keeps key-value data and time-series readings on a device, answers SQL on a gateway, and copies the same records to …
Tag
Alpha Demo
engines
AltSql Ask Puts One SQL Question to 500 Simulated Machines and Brings Back Only the Answers
An engineer wants to know which machines ran hot last night. The usual way is to pull every machine’s readings to a server first and ask there. That moves every raw …
case studies
Machine Monitoring Case Study: Overheat Alarm Handled on the Sensor While Wi-Fi Was Down
A temperature sensor on a machine takes one reading a second. When the machine runs hot, the fan has to come on right away, whether or not the plant’s Wi-Fi is …
case studies
Cold Chain Case Study: Truck Logger Records a 51-Minute Excursion With No Coverage
Medicines and fresh food travel in refrigerated trucks, and many loads must stay between 2 and 8 °C for the whole trip. When the cooling fails, somebody has to know how …
case studies
Agriculture Case Study: Soil Sensor Runs the Valve Itself and Reports in 38 Bytes a Day
A soil sensor in a field usually runs on a battery and talks over a radio that carries a few dozen bytes a day. It cannot wait for a server to tell it when to water. In …
engines
AltSql Vector Teaches a Device What a Healthy Motor Sounds Like, in 32-Byte Fingerprints
A vibration sensor on a motor hears a lot. Most of it is the motor doing its job. The useful part is the moment the sound changes into something new, like a bearing …
engines
AltSql Wave Keeps Raw Vibration Bursts on the Device, Lossless, and Sends Only Their Features
When a pump’s bearing starts to fail, an analyst wants two things. A quick figure to spot it, and the raw signal to understand it. Devices usually keep one or the …
engines
AltSql Mesh Keeps Twelve Devices on One Table on a Simulated Farm With No Signal and No Gateway
Some places have no mobile coverage and nowhere to put a gateway. A big sheep farm is one. The people working it still need the same picture: which troughs are low, which …
engines
AltSql Realtime Meets a 10 ms Deadline on a Simulated Flash Chip That Takes 45 ms to Erase
A controller runs its loop 100 times a second. Every cycle it saves a value and logs a row, and those writes have to finish within 10 ms. The trouble is the flash chip. …
engines
AltSql Instant: A Battery-Free Sensor on MRAM Saved 1,428 Readings in a Simulated Minute, Against 220 for AltSql Core on Flash
Some sensors have no battery. A small solar cell charges a capacitor, and when it is full the sensor wakes and works until the charge runs out. Then the power goes, …