Pressure sensors (also called tensometrami) are devices that convert mechanical energy into electrical energy by determining the pressure force exerted on the surface and convert it to the figure, an electrical signal (current or voltage) whose value is proportional to the ratio of the pressure force. Pressure sensors find application, in particular, in various electronic scales, and wherever mass is a critical value, rzutującą on the correct functioning of the device or object. Our store also offers a beam strain gaugeto measure the strength of clip objects with a maximum total weight range from 1 kg to 40 kg.
Pressure sensor reduces its resistance when the force put to the square tip, increases. The sensor is in the form of a rectangle with sides of 33 mm. The set has 4 pieces, working in the range of up to 50 kg each. The sensors require a corresponding amplifier, to work.
The piezoelectric elements are useful for detecting the vibration or knocking. You can use them in a simple way by reading the voltage at the output. It can also be used for very small audio converters such as buzzer. Membrane with an outer diameter of 20 mm, internal 14 mm and the thickness of 0.20 mm. An impedance is 1000 Ω,...
The membrane is made of a conductive material. The pressure, at any point, changes the resistance, which leads to the measurable change of the voltage in a simple way. The membrane has dimensions of 280 x 280 x 0.1 mm, it can be freely bent.
Strain-gauge beam operating in the range of up to 1 kg (approx. 10 N). The smallest version is used, for example, in kitchen scales, portable scales. The connecting cable has tips with the removed insulation, and its length is 25 cm.
The pressure sensor reduces its resistance when the force put to the square tip, increases. The sensor in the form of a rectangle with the side of 34 mm. For the operation of the sensors, required is an appropriate amplifier. The sensors work in pairs (half bridge) or in fours (full bridge).
Strain-gauge beam operating in the range of up to 5 kg (approx. 50 N). The smallest version is used, for example, in kitchen scales, portable scales. The connecting cable has tips with the removed insulation, and its length is 25 cm.
Resistive pressure sensor FSR)consists of two layers, of insulated electrically relative to each other. When there is force applied pressure on the top layer in the form of a membrane foil, sheath insulating the pressure on the active layer, which is covered with measurement points electrically conductive. The more pressure, the less contact resistance between the measurement points. The conductor layer is connected under the power supply of the auxiliary voltage, and the voltage signal, which is the projection of the applied force pressure, can be read by Arduino with the help of a Converter analog-to-digital and based on the algorithm, the programs, processed the weights provided on the surface of the sensor weight. The result of the measurement can be changed on the LCD.
FSR flat sensors are made from very soft material and during their installation it is necessary to exercise extreme caution. At the stage of prototyping, the easiest way for such a sensor to be connected to the contact plate directly, or by using crocodile clips” or connection of SHEETS with screw terminals. If you want to solder the pressure sensor PCB, you must take care of the cleanliness of the grotto of the soldering and the soldering surface, as even for a few seconds can occur by flooding of the layers of the sensor, causing damage.