US 12,339,172 B2
Device for acoustic temperature measurement
Peter Kalkert, Jülich (DE)
Assigned to KIMA PROCESS CONTROL GMBH, Jülich (DE)
Appl. No. 17/786,029
Filed by KIMA PROCESS CONTROL GMBH, Jülich (DE)
PCT Filed Dec. 11, 2020, PCT No. PCT/EP2020/085688
§ 371(c)(1), (2) Date Jun. 16, 2022,
PCT Pub. No. WO2021/122353, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 19217306 (EP), filed on Dec. 18, 2019.
Prior Publication US 2023/0358619 A1, Nov. 9, 2023
Int. Cl. G01K 11/24 (2006.01); G01K 13/024 (2021.01); G01N 29/024 (2006.01); G01N 29/22 (2006.01); G01N 29/24 (2006.01); G01N 29/32 (2006.01); G01N 29/34 (2006.01); G01N 29/44 (2006.01)
CPC G01K 11/24 (2013.01) [G01K 13/024 (2021.01); G01N 29/024 (2013.01); G01N 29/221 (2013.01); G01N 29/223 (2013.01); G01N 29/2437 (2013.01); G01N 29/326 (2013.01); G01N 29/343 (2013.01); G01N 29/4436 (2013.01); G01N 2291/011 (2013.01); G01N 2291/02881 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A device for an acoustic temperature measurement in a gaseous medium passing a medium channel by means of runtime measurement of an acoustic pulse running through the gaseous medium from at least a first transmitter arrangement to at least a first receiver arrangement,
the first transmitter arrangement comprising a sound pulse generator for generating the acoustic pulse, which is connected by a first acoustic channel to a transmitter which transmits the acoustic pulse into the medium, the first acoustic channel being of acoustically dispersive design, and, the first receiver arrangement comprising a receiver for receiving the acoustic pulse after it has passed through the medium and for transmitting it via a second acoustic channel to a first microphone for detecting the acoustic pulse, the first acoustic channel being curved towards the sound pulse generator in such a way that the radiant heat of the medium on the sound pulse generator is at least greatly reduced,
wherein at least the transmitter comprises on its side facing the medium to be measured an interfering element which is configured as a ring or an appropriate shape around the output of the transmitter and reflects a part of the acoustic pulse back to the first acoustic channel of the first transmitter arrangement, in which a second microphone is arranged for detecting the back-reflected part of the acoustic pulse, the device further comprising a pulse discriminator designed to determine the arrival times of the recorded acoustic pulses in a suitable way and to transmit them to an evaluation unit designed to determine the temperature of the medium from the runtime of the acoustic pulse from the transmitter to the receiver, taking into account the arrival times determined by the pulse discriminator and the acoustic pulses detected by first and second microphones.