The LJ-ZDY-1000 Flatness Measuring Instrument is primarily designed for flatness measurement and recording during rail weld joint construction, maintenance, and monitoring. It is widely applicable to various units involved in the construction and maintenance of seamless rail transit infrastructure, including railway bureau engineering departments, rail welding bases, construction engineering companies, subway construction and maintenance parties, and scientific research institutions.

Equipment Components: 1 Charging Indicator Light: Illuminates when the main unit is plugged in (red during charging, green when charging is complete)
2. Operation Indicator Light: Displays the device operating status (slow red flashing when the device is not connected, fast green flashing when WiFi is successfully connected, fast blue flashing when Bluetooth is successfully connected, fast red flashing during testing)
3. Carrying Handle: Handle for short-distance on-site movement of the device
4. Left and Right Insulation Components: Built-in communication antenna and magnetic suction components, with a top button controlling the bottom magnet to adhere to the measured surface of the device casing
5. Device Power Switch (automatically shuts down after 10 minutes in a disconnected state)
6. Device Nameplate, WiFi Antenna, Bluetooth Antenna
7. Left and Right Positioning Brackets: Curved edge facing downward for running surface measurement, long straight edge facing downward for guiding surface measurement (can only rotate in one direction). Left and Right Reference Contact Blocks: The measurement reference points of the entire electronic scale (placed on a flat area and in good contact with the measured track)
8. Power Module, 14 Lithium Battery Pack
9. Measurement and Main Control Circuit
10. Sensor Detection Surface: Arranged from left to right with 100 capacitive sensors (protect this surface from external impact) 19 DC Charging Port 20 Device Model

Specifications:
Measuring Length 1m Battery Capacity 4x3.7v LI-ION/12800mAh
Horizontal Resolution 100 points (1 point/cm) Bluetooth Standby Time 150 hours (>5000 measurements)
Vertical Resolution 0.003mm WiFi Standby Time 80 hours (>3000 measurements)
Measurement Accuracy ±0.01mm Protection Rating IP65
Measurement Stability rms 0.01mm Operating Ambient Temperature -20℃~+50℃
Linearity Error ± 0.2% Rail Operating Temperature -40℃~+80℃
Measurement Range -2.5mm~+2.5mm Humidity Requirement <90%
Single Measurement Time <6s Charging Interface DC
Device Net Weight 5KG Communication Interface
Main Body Dimensions 1200mmx57.5mmx50mm Positioning Module GPS/BeiDou