KontrollVahend ja Tehnika (KVT) OÜ
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Hottinger Baldwin Messtechnik GmbH, Germany
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Test device control parameters, engines and power measurements

The test stand for testing of internal combustion engines

01-Испытательный-стенд-для-проверки-двигателей.pngtorque measurement, calculation speed and power - a key issue in engine tests. The measuring unit of the test stand is a torque sensor. The model shown in the figure, is used T40B torque sensor, attached to the 3-phase induction motor. T40B Digital gauge is designed for precision measurements of torque even at low revs and monitoring of the direction of rotation. T40B sensor is not sensitive to dust and oil contaminants, so can be used in engine test stands. speed and torque signals are amplified using MGCplus measuring amplifier. All signals from the test stands, for example, power calculation on the values of speed and torque, processed by a computer. But this operation can fulfill himself MGCplus amplifier.

Additional advantages: The digital interface TMC in T40B sensor stator allows you to connect to the interface module TIM40, which makes it possible not only to gauge a standalone application, but also by its integration into a variety of test systems on the basis of field bus, for example, CAN, Profibus-DP and EtherCAT .

Test bench for steering

02-Испытательная-стенд-для-рулевого-механизма.pngThe figure shows the system debugging steering operation. The steering mechanism is tested in the unloaded condition, so torque sensor T5, located between the steering mechanism and the motor, only measures the internal friction. Both the direction of rotation booster tested for about 1 minute to determine the amount of friction that must be within certain limits. These measurements can be made, for example, service stations, having a number of such test beds. The amplifier MGCplus designed to operate in industrial environments. The amplifier supports all major types of sensors, simultaneous data collection is carried out by Ethernet, USB, CANBus, ProfibusDP.

Additional benefits: torque sensor T5 has a nominal torque of 10 Nm ... 200 Nm and the accuracy class of 0.1.

Measuring the efficiency of differential gear

03-Измерение-КПД-дифференциального-механизма.pngDetermination of the efficiency of the differential mechanism is a complex measurement tasks. Power loss in the differential is relatively small, it has a capacity given engine, approximately equal to the power that receives the load. To determine the efficiency necessary to measure the difference between the capacity with high accuracy. The figure below uses digital precision torque sensors T40B. In an amplifier using the MGCplus measuring amplifier, which brings to light the rotation speed, torque and power through three channels. To calculate the efficiency of the interface, you can connect your computer.

Additional advantages: The sender characteristics T40B: the range of the rated torque: 50 N · m ... 10 kN · m, accuracy class of 0.05, low weight and moment of inertia of the rotor.

Universal test stand for internal combustion engines


In the development of the internal combustion engine is required to carry out numerous measurements of various engine parameters of state and their subsequent processing on a computer. The main parameters are: torque, pressure, speed, temperature and fuel consumption. The figure below shows a selection of the most important measuring points. Conventional flowmeters fuel not used because of low accuracy. Instead, they propose to weigh the fuel tank with the help of weight load cell C2 and monitor the weight loss at specified time intervals. To measure the parameters used by the amplifier MGCplus with twelve channels. The processing results are transmitted to the computer. HBM offers a well developed professional software for a variety of measurement tasks.

Additional advantages: You can take advantage of a complete measurement chain from the HBM: from strain gages and strain gage sensors to measuring systems and software.

Check the operation of the oil distributor block in an automatic transmission


Central to the automatic transmission holds the oil distributor block which is cast from aluminum labyrinth having predetermined dimensions. With the valves, he distributes the oil flow created by the converter. For a functional test the unit is installed in the gearbox. The unit has 24 holes that allow you to measure pressure at different stages of a gear change. P3MB pressure sensors are located in the control panel and connected to the openings via flexible hoses. The control panel can also be equipped with measuring amplifier MGCplus.

Additional benefits: Sensors Р3MB intended for use with fixed and variable pressure engines. The sensor features a corrosion resistance and an IP65 or IP67. Measuring amplifier MGCplus supports standard USB interfaces, Ethernet, RS232C, CANBus, ProfibusDP.

Testing of anti-lock systems


The figure shows a measuring system used for brake fluid pressure monitoring before and after it passes through the anti-lock system. Inlet and outlet pressure is measured with the help of 2 pressure sensors РЗМВ. High resonant frequency of the sensor makes it possible to measure the rapidly changing pressure without errors. MGCplus measuring amplifier is used for simultaneous amplification and processing of the results obtained with the transfer to a computer. Simultaneous measurements are needed for comparing pressure measurements over a period of time of two channels.

ДExtra benefits: Sensor P3MB works in the ranges of 0 ... 1 - 0 ... 5 bar with a piezoresistive measuring principle (is possible to measure gauge pressure) in the range of 0 ... 10 - 0 ... 3000 bar with a piezoresistive measuring principle; degree of protection IP65 or IP67 sensor. Perhaps intrinsically safe.

Test engines washing machine


Washing machines, like other equipment are electric motors. In the development and manufacture of washing machine motors require speed detection, torque and engine power at high speeds. To solve this problem, it can be used T20WN torque sensor. This sensor can be used for measuring torque in rotating and stationary structural elements. The integrated sensor system for measuring the rotation angle and rotation speed.

Additional advantages: The sender characteristics T20WN: rotary analog torque sensor with contactless signal transmission method, a nominal torque range: 0.1 Nm ... 200 kN · m, accuracy class 0.2.