German BERCU sensor BERCU model BERCU price

BERCU sensor is a sensor that measures the air flow drawn into the engine. In electronic control gasoline injection engines, to obtain the optimal mixture concentration under various operating conditions, it is necessary to accurately measure the amount of air drawn into the engine at every instant, using this as the main basis for the ECU to calculate (control) the fuel injection quantity. If the air flow sensor or its wiring fails, the ECU will not receive the correct intake air signal, preventing normal control of the fuel injection quantity, which will cause the mixture to be too rich or too lean, resulting in abnormal engine operation.

BERCU sensor classification

Load cells are divided into 8 types based on conversion methods, including photoelectric, hydraulic, electromagnetic force, capacitive, magnetic pole variation, vibratory, gyroscopic, and resistive strain gauge types, with resistive strain gauge being the most widely used. 1) Photoelectric type: Includes grating and code disk types. Grating sensors use Moiré fringes formed by gratings to convert angular displacement into photoelectric signals. There are two gratings: one fixed grating and one moving grating mounted on the dial shaft. The object being weighed on the load-bearing platform rotates the dial shaft through a force transmission lever system, driving the moving grating to rotate and causing the Moiré fringes to move. Using a phototube, conversion circuit, and display instrument, the number of moved Moiré fringes can be calculated to measure the angle of grating rotation, thereby determining and reading the mass of the object. Code disk sensor: The code disk (symbol plate) is a piece of transparent glass mounted on the dial shaft, featuring black and white codes arranged according to a specific encoding method. When the object on the load-bearing platform rotates the dial shaft via the force transmission lever, the code disk also rotates by a certain angle. A photocell receives the light signal passing through the code disk and converts it into an electrical signal, which is then digitally processed by the circuit, finally displaying the number representing the measured mass on the display. Photoelectric sensors were mainly used in electromechanical combination scales. 2) Hydraulic type: When subjected to the gravity P of the object being weighed, the pressure of the hydraulic oil increases, with the degree of increase proportional to P. By measuring the increase in pressure, the mass of the object can be determined. Hydraulic sensors have a simple and robust structure and a large measurement range, but the accuracy generally does not exceed 1/100. 3) Capacitive type: It operates based on the direct proportional relationship between the oscillation frequency f of the capacitor oscillator circuit and the distance d between the plates. There are two plates, one fixed and the other movable. When the object is loaded onto the load-bearing platform, the leaf spring deflects, changing the distance between the two plates, which in turn changes the oscillation frequency of the circuit. By measuring the change in frequency, the mass of the object on the load-bearing platform can be calculated. Capacitive sensors consume little power, have low cost, and have an accuracy of 1/200 to 1/500.

BERCU sensor features

Resistors, inductors, and capacitors are the three major types of passive components in electronics. A capacitive sensor is a sensor that converts changes in the measured quantity into changes in capacitance; it is essentially a capacitor with variable parameters. Capacitive sensors have the following advantages: high impedance, low power, requiring only very low input energy. They can achieve large changes, resulting in high signal-to-noise ratio and system stability. Fast dynamic response, with operating frequencies reaching several megahertz, suitable for non-b contact measurement, applicable to both conductive and semiconductor objects. Simple structure, strong adaptability, capable of working in harsh environments such as high/low temperatures and strong radiation, with wide applications. With the development of electronic technology and computer technology, the disadvantages of capacitive sensors, such as susceptibility to interference and distributed capacitance, have been continuously overcome, and capacitive grid displacement sensors and integrated capacitive sensors have been developed. Therefore, they are widely used in non-electrical quantity measurement and automatic detection, capable of measuring parameters such as pressure, displacement, speed, acceleration, A level, thickness, liquid level, humidity, vibration, and component content. Capacitive sensors have good development prospects.

BERCU sensor installation precautions

1) Handle load cells with care, especially small-capacity sensors with aluminum alloy elastic bodies, as any impact or drop caused by vibration is likely to cause significant output errors. 2) When designing the loading device and during installation, ensure that the axis of the loading force coincides with the force-bearing axis of the load cell to minimize the effects of tilted and eccentric loads. 3) Regarding level adjustment. If using a load cell, use a spirit level to adjust the installation plane of its base until it is level; if multiple sensors are measuring simultaneously, their base installation surfaces should be kept as level as possible, primarily to ensure that the force borne by each sensor is basically consistent. 4) Determine the rated load of the sensor used based on the load cell capacity selection specified in its instructions. 5) To prevent chemical corrosion, it is advisable to coat the outer surface of the load cell with Vaseline during installation. Avoid use in locations with direct sunlight exposure and drastic environmental temperature changes. 6) Add bypasses made of copper braided wire to both ends of the load cell loading device. 7) Do not extend the cable yourself; if extension is absolutely necessary, solder the joints and add moisture-proof sealant. 8) It is best to use some baffles around the load cell to cover it. This prevents debris from falling into the moving parts of the sensor, affecting its measurement accuracy. 9) The sensor's cable should be kept away from high-power power lines or places with pulse waves. If avoidance is impossible, the load cell cable should be threaded separately into an iron pipe, and the connection distance should be shortened as much as possible. 10) Determine the rated load of the sensor used based on the load cell capacity selection specified in its instructions. Although the load cell itself has a certain overload capacity, such situations should be avoided during installation and use. Sometimes even short-term overload can cause permanent damage to the sensor. 11) For high-precision applications, the load cell and instrument should be used after preheating for 30 minutes.

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