METRIX original European and American full range supply of vibration sensors

METRIX original European and American full range supply of vibration sensors

METRIX vibration sensor ST5484E-151-0132-00 is supplied with the full range of European and American original products

Shanghai Pumin has its own branch in Germany and the United States specializing in importing spare parts from Europe and America. The company has overseas original factory channels with good prices and short delivery times.

Quick quotation: For advantageous brands, we have a price list and maintain daily phone communication with suppliers to provide you with fast and timely quotations.

Price advantage: We directly obtain quotes from spot goods, avoiding many intermediate links. Many spot goods provide us with fixed discounts, ensuring that we offer customers favorable prices.

The application of METRIX in the United States is as follows:

1) Photoelectric switches can be used in various applications, avoiding strong light sources. Photoelectric switches can generally work stably in high environmental illumination. But avoid aligning the sensor's optical axis directly with strong light sources such as sunlight and incandescent bulbs. When the angle between the optical axis of the sensor (receiver) and the strong light source cannot be changed, a light shielding plate or a long light shielding tube can be installed around the top of the sensor.

2) To prevent mutual interference, MGK series new photoelectric switches usually have the function of automatically preventing mutual interference, so there is no need to worry about mutual interference. However, when HGK series infrared photoelectric switches are installed in parallel and close proximity, adjacent groups and mutual interference should be prevented. An effective way to prevent this interference is to cross set the projector and receiver, and when there are more than two groups, the group spacing should be widened. Of course, using models with different frequencies is also a good approach.

The effective way to prevent mutual interference in HGK series reflective photoelectric switches is to widen the gap. And the farther the detection distance, the larger the interval should be, and the specific interval should be determined according to the debugging situation. Of course, models with different operating frequencies can also be used.

3) Mirror angle influence: When the object being tested has luster or encounters a smooth metal surface, the reflectivity is generally high, which has an approximate mirror effect. At this time, the projector should be installed at an angle of 10-20 ° with the object being tested, so that its optical axis is not perpendicular to the object being tested, thereby preventing misoperation.

4) Excluding the influence of background objects: When using a reflective diffusion type projector or receiver, sometimes the photoelectric switch may not be able to detect stably due to the proximity of the detected object to the background object, or because the background is a smooth and high reflectivity object. Therefore, distance limited projectors and receivers can be used instead, or methods such as keeping away from the background, removing the background, painting the background black without light, or trying to make the background rough and dark can be used to eliminate it.

5) Self diagnostic function usage: During installation or use, there may be slight deviation of the optical axis, lens contamination, dust accumulation, external noise, and environmental temperature exceeding the range due to the influence of the table or background, as well as vibration during use. These issues may cause the photoelectric switch to deviate from the stable working area. In this case, the self diagnostic function of the photoelectric switch can be used to send a notification through the STABLITY green stability indicator light to remind the user to adjust it in a timely manner.

METRIX Vibration Sensor Classification:

1. Relative equation

Electric sensors are based on the principle of electromagnetic induction, which means that when a moving conductor cuts magnetic lines in a fixed magnetic field, an electromotive force is induced at both ends of the conductor. Therefore, sensors produced using this principle are called electric sensors.

From the perspective of mechanical receiving principle, a relative electric sensor is a displacement sensor. Due to the application of electromagnetic induction law in the electromechanical transformation principle, the electromotive force generated is proportional to the measured vibration velocity, so it is actually a speed sensor.

2. Eddy current type

Eddy current sensor is a relative non-contact sensor that measures the vibration displacement or amplitude of an object by changing the distance between the sensor end and the measured object. Eddy current sensors have the advantages of a wide frequency range (0-10 kHz), a large linear working range, high sensitivity, and non-contact measurement. They are mainly used for measuring static displacement, measuring vibration displacement, and monitoring shaft vibration in rotating machinery.

3. Inductive type

According to the relative mechanical receiving principle of sensors, inductive sensors can convert changes in the measured mechanical vibration parameters into changes in electrical parameter signals. Therefore, there are two forms of inductive sensors: variable gap and variable magnetic field area.

4. Capacitive type

Capacitive sensors are generally divided into two types. Variable gap type and variable common area type. Variable gap type can measure the displacement of linear vibration. The variable area equation can measure the angular displacement of torsional vibration.

5. Inertial type

The inertial electric sensor consists of a fixed part, a movable part, and a supporting spring part. In order for the sensor to operate in a displacement sensor state, the mass of its movable part should be sufficiently large, and the stiffness of the supporting spring should be sufficiently small, that is, the sensor should have a sufficiently low natural frequency.

According to the law of electromagnetic induction, the induced electromotive force is u=Blx&r, where B is the magnetic flux density, l is the effective length of the coil in the magnetic field, and r x&is the relative velocity of the coil in the magnetic field.

In terms of sensor structure, an inertial electric sensor is a displacement sensor. However, due to the fact that the output electrical signal is generated by electromagnetic induction, according to the law of electromagnetic induction, when the coil makes relative motion in a magnetic field, the induced electromotive force is proportional to the speed at which the coil cuts through the magnetic field lines. Therefore, in terms of the output signal of the sensor, the induced electromotive force is proportional to the measured vibration speed, so it is actually a speed sensor.

METRIX original European and American full range supply of vibration sensors

6. Piezoelectric type

The mechanical receiving part of the piezoelectric accelerometer is based on the principle of inertial acceleration mechanical receiving, and the electromechanical part utilizes the positive piezoelectric effect of piezoelectric crystals. The principle is that certain crystals (such as artificially polarized ceramics, piezoelectric quartz crystals, etc., different piezoelectric materials have different piezoelectric coefficients, which can generally be found in the performance table of piezoelectric materials) will generate charges on their crystal or polarization surfaces when subjected to external forces in a certain direction or deformation. This transformation from mechanical energy (force, deformation) to electrical energy (charge, electric field) is called the positive piezoelectric effect. The transformation from electrical energy (electric field, voltage) to mechanical energy (deformation, force) is called the inverse piezoelectric effect.

Therefore, by utilizing the piezoelectric effect of crystals, force sensors can be made. In vibration measurement, due to the fact that the force acting on the piezoelectric crystal is the inertial force of the inertial mass, the number of charges generated is proportional to the magnitude of acceleration. Therefore, piezoelectric sensors are acceleration sensors.

7. Piezoelectric force

In vibration testing, in addition to measuring vibration, it is often necessary to measure the dynamic excitation force applied to the specimen. Piezoelectric force sensors have the advantages of wide frequency range, large dynamic range, small size, and light weight, and therefore have been widely used. The working principle of piezoelectric force sensors is to utilize the piezoelectric effect of piezoelectric crystals, that is, the output charge signal of piezoelectric force sensors is proportional to external forces.

8. Impedance head

Impedance head is a comprehensive sensor. It integrates piezoelectric force sensors and piezoelectric acceleration sensors, and its function is to measure the excitation force at the force transmission point while measuring the motion response of that point. Therefore, the impedance head consists of two parts, one is the force sensor and the other is the acceleration sensor. Its advantage is to ensure that the response of the measurement point is the response of the excitation point. When in use, connect the small head (force measuring end) to the structure and the large head (acceleration measuring end) to the force rod of the exciter. Measure the excitation force signal from the "force signal output terminal" and the response signal of acceleration from the "acceleration signal output terminal".

Note that impedance heads can generally only withstand light loads, and therefore can only be used for measuring lightweight structures, mechanical components, and material samples. Whether it is a force sensor or an impedance head, their signal conversion components are piezoelectric crystals, so their measurement circuits should be voltage amplifiers or charge amplifiers.

9. Resistance strain gauge

Resistance strain sensors convert the measured mechanical vibration into a change in the resistance of the sensing element. There are various forms of sensing elements that can achieve this electromechanical conversion, among which the most common is the resistance strain sensor.

The working principle of resistance strain gauges is that when the strain gauge is attached to a certain specimen, the specimen is subjected to force deformation, the original length of the strain gauge changes, and thus the resistance value of the strain gauge changes. Experimental results have shown that within the elastic range of the specimen, the relative change in resistance of the strain gauge is proportional to the relative change in its length.

10. Laser

Laser sensor is a sensor that uses laser technology for measurement. It consists of a laser, a laser detector, and a measurement circuit. Laser sensor is a new type of measuring instrument, which has the advantages of non-contact long-distance measurement, fast speed, high accuracy, large range, strong resistance to light and electrical interference, and is extremely suitable for non-contact measurement applications in industry and laboratories.

The hot selling models of Shanghai Pumin are as follows:

METRIX vibration transmitter st5484e-132-013-00

METRIX vibration transmitter st5484e-132-014-00

METRIX vibration transmitter st5484e-132-020-00

METRIX vibration transmitter st5484e-132-021-00

METRIX vibration transmitter st5484e-132-032-00

METRIX vibration transmitter st5484e-132-033-00

METRIX vibration transmitter st5484e-132-034-00

METRIX vibration transmitter st5484e-132-042-00

METRIX vibration transmitter st5484e-132-043-00

METRIX vibration transmitter ST5484E-121-024-00

METRIX vibration transmitter ST5484E-121-030-00

METRIX vibration transmitter ST5484E-121-031-00

METRIX vibration transmitter ST5484E-121-032-00

METRIX vibration transmitter ST5484E-121-033-00

METRIX vibration transmitter ST5484E-121-034-00

METRIX vibration transmitter ST5484E-121-040-00

METRIX vibration transmitter ST5484E-121-041-00

METRIX vibration transmitter ST5484E-121-042-00

METRIX vibration transmitter ST5484E-121-043-00

For more product information, please click:Shanghai Pumin Industrial Automation Equipment Co., Ltd