IEC 63041-3 pdf free download

IEC 63041-3 pdf free download.Piezoelectric sensors – Part 3: Physical sensors.
3.1.1
piezoelectric acceleration sensor element
piezoelectric sensor component whose resonance frequency or delay is used to measure the change in velocity of an object with time
3.1.2
piezoelectric humidity sensor element
piezoelectric sensor component whose resonance frequency or delay is used for dew point and moisture detection
3.1.3
piezoelectric tilt angle sensor element
piezoelectric sensor component whose resonance frequency or delay is used to measure tilt angles, elevation, or depression of an object with respect to gravity’s detection
3.1.4
piezoelectric vibration sensor element
piezoelectric sensor component whose resonance frequency or delay is used for measurement of vibration
3.1.5
dual mode sensor
piezoelectric sensor which is able to detect physical quantities from a change in resonance frequencies of two independent modes on a single piezoelectric plate
Note I to entry: In order to achieve improved precision and/or to eliminate undesired influence factors, sensor solutions are employed that utilize two or more modes. By evaluation of combinations of these modes’ sensitivities to various ambient conditions, on the one hand, improved detection sensitivity can be achieved, while, on the other hand, undesirable sensitivities can be reduced or eliminated.
3.1.6
differential sensor
piezoelectric sensor which is able to detect physical quantities from a change in resonance frequencies or delays of two independent and same micro-acoustic structures assembled on the same or different piezoelectric plates
3.1.7
multi-measurand sensor
piezoelectric sensor which is able to detect two or more different physical quantities from an analysis of different sensor responses
3.2 Symbols and units
The symbols and units given in IEC 63041-1 apply.
4 Specifications
4.1 General
Key points of the specification are identified in IEC 63041-1:2017, Clause 5.
4.2 Conceptual diagrams of sensor types
4.2.1 General
In addition to the sensor types listed in IEC 63041-1:2017, Clause 4, specific realizations are common for surface acoustic wave (SAW) sensors.
4.2.2 Conceptual diagram for sensor elements of SAW resonator type
Figure 1 and Figure 2 show conceptual diagrams for resonator type SAW sensors. Figure 1 provides one resonance which is sensitive to undesirable influence factors such as frequency pulling. In the case of Figure 2, comprising e.g. a parallel connection of two resonators at different resonance frequencies, the sensor will be designed to have similar sensitivities of both resonators to such undesired effects and is therefore suitable to achieve higher accuracy with respect to the target measurand due to this compensation technique.
4.2.3 Conceptual diagram for sensor elements of SAW delay-line type
Figure 3 shows a transmission type (two-port) and Figure 4 shows a reflective type (one-port). Reflective delay lines use the SAW propagation path which is evaluated for delay and attenuation changes twice for incident and reflected wave, and therefore can be designed as smaller realizations. Reflective delay-line sensors can be designed to feature a unique sensor identification, in combination with their sensor capabilities, by using several SAW reflector structures resulting in a characteristic pattern of the reflected signal which can be distinguished from other sensors using the same frequency range.
4.3 Technical documents
The physical reaction in sensor cell and detection methods are defined in Annex A.
The following a) to f) shall clearly be defined in the specifications to be concluded between the manufacturer and customers:
a) Avoidance of coupling of main and unwanted vibration modes;
b) Detection direction of sensor element;
c) Hysteresis of sensor elements;
d) Linearity between sensor outputs and physical quantities to be detected;
e) Overload characteristics by excessive physical quantities to be detected;
f) Response time of sensor elements.IEC 63041-3 pdf download.