Eltra linear sensor from Italy

The function of the linear sensor is to convert the linear mechanical displacement into an electrical signal. In order to achieve this effect, the variable resistance slide rail is usually fixed on the fixed part of the sensor, and different resistance values are measured by the displacement of the slide plate on the slide rail. The sensor slide is connected to a steady-state DC voltage, allowing a small current of microamperes to flow, and the voltage between the slide and the start is proportional to the length of the slide. Using the sensor as a voltage divider can minimize the requirements for the accuracy of the total resistance of the slide, because the resistance change caused by the temperature change will not affect the measurement result.

　　 Linear displacement sensor parameters:

Wear-resistant life >100X106 times >25X106 meters noiseless output engineering guide rail

　　 Linear accuracy error<0.05[%]

　　 Repeatability error <0.005mm

　　Maximum moving speed 10m/s

　　Maximum allowable voltage DC60V/5KΩ～20KΩ DC40V/2 KΩ DC24V/1KΩ temperature drift coefficient<1.5ppm/℃

　　 Resolution Uninterrupted analysis

　　Tie rod (including two ends hinged type) or slider type, general type or micro surface electrophoresis, anti-static and radiation

　　High wear-resistant engineering slip ring and seal

　　All are high temperature and aging resistant type -60～+150℃

　　 All adopt high protection grade IP67, IP65

Requirements for the use of linear sensors:

　　 1. The supply voltage should be stable

　　Industrial power supply requires a stability of ±0.1%. For example, the reference voltage is 10V, and a fluctuation of ±0.01V is allowed, otherwise, it will cause the displayed trap to fluctuate. If the displayed fluctuation range at this time does not exceed the fluctuation range of the fluctuation voltage, the displacement sensor electronic ruler is normal.

　　2, prevent electrostatic interference

　　 Electrostatic interference and FM interference can easily make the digital display of the electronic ruler jump. Separate the strong current line of the equipment from the signal line of the electronic ruler in a wire duct. The electronic ruler should use a compulsory grounding support, and the electronic ruler housing (the resistance between the end cover screw and the support can be measured, should be less than 1Ω resistance) is well grounded, the signal line should be shielded, and one end of the electrical box should be shielded The wire is grounded. In the case of static electricity interference, the voltage measurement of the general multimeter is very normal, but it shows the digital bounce; the phenomenon is the same when the high frequency device is interfered. To verify whether it is electrostatic interference, use a power cord to short-circuit the cover screw of the electronic ruler with a certain point of metal on the machine. As long as a short-circuit, the electrostatic interference will be eliminated immediately. However, it is difficult to eliminate high-frequency interference by the above-mentioned methods, and high-frequency interference occurs frequently in robots and inverters, which can be verified by stopping the robot or the inverter power saver.

　　3, can not connect three wrong lines

　　 "1" and "3" lines are power lines, and "2" is output lines. Except for power lines ("1" and "3" lines) can be changed, "2" lines can only be output lines. Once the above wires are connected wrongly, there will be large linear errors, very difficult to control, poor control accuracy, and easy to display bounce.

　　4, the power supply capacity should be sufficient

　　 If the power supply capacity is too small, the following situations are likely to occur: the mold clamping movement will cause the display of the glue injection ruler to jump, or the melt movement will cause the display of the mold clamping electronic ruler to fluctuate. Especially when the solenoid valve drive power supply is combined with the electronic ruler power supply, the above situation is likely to occur. In severe cases, the voltage fluctuation can be measured with the voltage file of a multimeter. If the problem cannot be solved even if the electrostatic interference and high-frequency interference are eliminated and the neutrality is not good, it can also be suspected that the power of the power supply is too low.

　　 5. The installation should be neutral

　　The angle tolerance is ±12°, and the parallelism tolerance is ±0.5mm. If the angle error and parallelism error are both too large, it will cause the display number to jump. In this case, the angle and parallelism must be adjusted.

　　6, prevent short circuit

　　During the working process of the displacement sensor electronic ruler, the displayed data is regularly bounced or not displayed at a certain point. In this case, it is necessary to check whether the connection line insulation is damaged and the ground short circuit caused by regular contact with the machine's metal casing.

　　7, avoid aging

　　 For the electronic ruler that has been used for a long time, the seal is aging, there may be a lot of impurities, and the mixture of oil and water, which affects the contact resistance of the brush, causing the display number to jump, which can be considered as the early damage of the displacement sensor electronic ruler itself.

Eltra sensor heavy-duty series; measuring range up to 10m; sturdy structure design; shell is made of metal material; stainless steel drawstring; 10m range series Eltra sensor has such characteristics, Eltra sensor it The structure is light and small, the installation is very convenient, does not require too much space, and its measurement stroke is also very long, and the accuracy is also high, its shell and reel have undergone certain anti-corrosion treatment, so the durability is very good This ensures that the quality of Eltra sensors will not be affected by other factors, and can work normally under any extreme environmental and climatic conditions.

Eltra sensor: 10m range series of Eltra sensors have output modes: resistance type, voltage type, current type, incremental pulse type, absolute pulse type. The function of the Eltra drawstring displacement sensor is to convert mechanical motion. Into an electrical signal that can be measured, recorded or transmitted. The longer its range, the more electrical signals it can measure, which is of great help to the measurement of industrial machinery and equipment.