US 11,982,548 B2
Sensor and sensor arrangement
Sven-Matthias Scheibe, Reichenberg (DE); and Stefan Pilz, Geithain (DE)
Assigned to Endress+Hauser Conducta GmbH+Co. KG, Gerlingen (DE)
Appl. No. 17/271,804
Filed by Endress+Hauser Conducta GmbH+Co. KG, Gerlingen (DE)
PCT Filed Jul. 30, 2019, PCT No. PCT/EP2019/070463
§ 371(c)(1), (2) Date Feb. 26, 2021,
PCT Pub. No. WO2020/043414, PCT Pub. Date Mar. 5, 2020.
Claims priority of application No. 10 2018 120 878.2 (DE), filed on Aug. 27, 2018.
Prior Publication US 2021/0341311 A1, Nov. 4, 2021
Int. Cl. G01D 5/20 (2006.01); G01D 11/24 (2006.01); H01F 38/14 (2006.01)
CPC G01D 5/204 (2013.01) [G01D 11/245 (2013.01); H01F 38/14 (2013.01); H01F 2038/143 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A sensor, comprising:
a sensor element embodied to detect a measurand;
a sensor circuit, including:
a microcontroller and an associated memory; and
a modulator/de-modulator circuit,
wherein the sensor circuit is in electrical contact with the sensor element and is configured to process values derived from the measurand, and
wherein the sensor circuit has a maximum input voltage and a maximum input current; and
an ex-circuit including:
a secondary coil embodied to detachably connect with a primary coil and thereby form an inductive coupling with the primary coil, wherein the inductive coupling forms an ex-interface to decouple the sensor circuit ex-technically from the cable, wherein the ex-circuit is configured to receive an electrical signal via the inductive coupling, wherein the electrical signal includes data modulated onto the electrical signal;
a voltage limiter embodied to limit a voltage of the electrical signal to the maximum input voltage of the sensor circuit; and
a current limiter embodied to limit a current of the electrical signal to the maximum input current of the sensor circuit,
wherein the ex-circuit is configured to supply the voltage-limited and current-limited electrical signal to the sensor circuit,
wherein the sensor circuit is further configured to de-modulate the data from the electrical signal and to modulate measurand data onto the electrical signal.