Waar zijn we mee bezig ?

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Sandrowski
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Re: Waar zijn we mee bezig ?

Bericht door Sandrowski »

motoindo schreef: wo 31 aug, 2022 09:13 amMooi, Sander ?
Die leeft ook nog steeds... :)

Niet zoveel spannends te melden eigenlijk. De afgelopen tijd vooral druk geweest met andere, niet elektronica gerelateerde, zaken. Mijn projectje ie in de fase van meten aangekomen, maar met de bloedhitte van de afgelopen weken heb ik mezelf er niet toe kunnen zetten om dat te gaan doen. Nu de herfst er weer aan komt hoop ik daar weer iets aan te gaan doen.
Groet,
Sander
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motoindo
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Re: Waar zijn we mee bezig ?

Bericht door motoindo »

Sandrowski schreef: zo 04 sep, 2022 09:44 am bloedhitte van de afgelopen weken
Ha, ik stond met die tempraturen te cnc'jen, lijmen en warnexen maar als pinda kan ik natuurlijk wat beter tegen de warmte :lol:

Op klantverzoek - amputatie kindervingertjes vond hij geen optie - toch maar frontjes voor de grown/up's gemaakt en alhoewel het helegaar niet mijn ding is toch aardig gelukt om de stof er een beetje netjes omheen te krijgen:

1662289434418.jpg
1662289434448.jpg

En oja, aanstaande zaterdag is er weer een luisterdagje van onze zba lotgenoten, in Ermelo dit maal :

zba.10.sept.png
Je hebt niet voldoende permissies om de bijlagen van dit bericht te bekijken.
Chris Camphuisen
mfb does to the ear what a pretty face does to the eye
ds23man
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Re: Waar zijn we mee bezig ?

Bericht door ds23man »

Ben ook weer terug. Viel me de laatste tijd al op dat er dit forum niets meer gebeurde. Blijkt dat de KPN dit forum op de spamlist heeft staan en als je een bericht mist er geen updates via de mail meer binnenkomen...
De Sapman
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Sandrowski
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Re: Waar zijn we mee bezig ?

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Erg veel gebeurt er ook niet de laatste tijd :) Iedereen is druk met andere zaken of heeft z'n spulletjes werkend denk ik.
Anyway, ik krijg gewoon mailtjes van een nieuw bericht (zit ook bij KPN)...
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Sander
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Re: Waar zijn we mee bezig ?

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ds23man schreef: do 17 nov, 2022 18:39 pm... Blijkt dat de KPN dit forum op de spamlist heeft staan...
Waaruit blijkt dat?
Groeten,
Hans
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Re: Waar zijn we mee bezig ?

Bericht door motoindo »

Sandrowski schreef: do 17 nov, 2022 20:38 pmAnyway, ik krijg gewoon mailtjes van een nieuw bericht (zit ook bij KPN)...
Yup, ik ook.
Chris Camphuisen
mfb does to the ear what a pretty face does to the eye
ds23man
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Re: Waar zijn we mee bezig ?

Bericht door ds23man »

Hans schreef: do 17 nov, 2022 21:24 pm
ds23man schreef: do 17 nov, 2022 18:39 pm... Blijkt dat de KPN dit forum op de spamlist heeft staan...
Waaruit blijkt dat?
Omdat ie in mijn spamlist stond, bleek inmiddels 15 berichten achter te lopen. Nu komt het wel in mijn normale inbox terecht.
De Sapman
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motoindo
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Re: Waar zijn we mee bezig ?

Bericht door motoindo »

https://chat.openai.com/chat

Q: what sensor technique is best suitable to build a servo loudspeaker
A: There are several different sensor techniques that could be used to build a servo loudspeaker. Some potential options include using a capacitive sensor to detect the movement of the speaker cone, a magnetoresistive sensor to measure the position of the speaker cone, or an inductive sensor to track the position of a coil attached to the speaker cone. Ultimately, the best sensor technique for a servo loudspeaker will depend on the specific design and requirements of the speaker system.
Q: for bass loudspeakers operating between 30 and 300 hz
A: For bass loudspeakers operating between 30 and 300 Hz, an inductive sensor may be a good option. This type of sensor uses a coil and a magnetic field to track the movement of the speaker cone. The coil is attached to the speaker cone, and as the cone moves back and forth, the magnetic field generated by the coil changes. This change in the magnetic field can be detected and used to control the speaker system, allowing it to produce high-quality bass sounds within the desired frequency range.
Q:but an inductive sensor may pickup the driving coil field ?
A: Yes, an inductive sensor may pick up the magnetic field generated by the driving coil in a loudspeaker system. However, this can be mitigated by carefully designing the sensor and the loudspeaker system to minimize interference between the two. For example, the sensor and the driving coil can be positioned in such a way that they do not interfere with each other, or the sensor can be designed to only detect changes in the magnetic field that are caused by the movement of the speaker cone. Additionally, the sensor can be calibrated to account for any interference from the driving coil, allowing it to accurately track the movement of the speaker cone.
Q:but pickup coils suffer from nonlinearities caused by a change in BL as the voicecoil moves in and out the magnet gap
A: Yes, pickup coils used in inductive sensors can suffer from nonlinearities caused by changes in the magnetic field (known as the "BL" value) as the voice coil moves in and out of the magnet gap. This can cause the sensor to produce inaccurate or distorted readings, which can negatively impact the performance of the loudspeaker system. To mitigate this issue, the sensor can be carefully designed and calibrated to minimize nonlinearities, and the loudspeaker system can be designed to minimize changes in the magnetic field as the voice coil moves. Additionally, the sensor can be compensated for any nonlinearities during operation, allowing it to produce accurate and reliable readings despite changes in the magnetic field.
Q: Are there sensors that better perform in this task
A: There may be sensors that perform better than inductive sensors for tracking the movement of a speaker cone in a loudspeaker system. For example, magnetoresistive sensors or capacitive sensors could be used instead of inductive sensors. These types of sensors use different principles to track the movement of the speaker cone, and they may be less sensitive to nonlinearities caused by changes in the magnetic field. However, the best sensor for a given loudspeaker system will depend on the specific design and requirements of the system, and it may be necessary to experiment with different sensors to find the one that provides the best performance.
Q: what kind of sensor techniques are available ?
A: There are many different sensor techniques available for a wide range of applications. Some common types of sensors include:
  • Optical sensors, which use light to detect the presence or absence of an object, or to measure its position or movement. Examples include photodiodes, which detect changes in light intensity, and camera systems, which can be used to create images of an object or scene.
  • Mechanical sensors, which use physical mechanisms such as levers, springs, or pressure sensors to detect changes in position, movement, or pressure. Examples include accelerometers, which measure acceleration, and force-sensitive resistors, which can detect changes in force.
  • Electrical sensors, which use electrical signals or currents to detect changes in voltage, current, or resistance. Examples include thermocouples, which measure temperature, and strain gauges, which can detect changes in the shape or size of an object.
  • Chemical sensors, which use chemical reactions to detect the presence of specific substances. Examples include gas sensors, which can detect the presence of gases such as carbon monoxide, and biosensors, which can detect the presence of specific biomolecules such as proteins or DNA.
Q: which sensor is best when used with woofers ?
A: There is no one "best" sensor for use with woofers, as the optimal sensor will depend on the specific design and requirements of the woofer system. However, some potential options include using an inductive sensor to track the movement of the woofer cone, a magnetoresistive sensor to measure the position of the woofer cone, or a capacitive sensor to detect the movement of the cone. Ultimately, the best sensor for a given woofer system will depend on the specific design and requirements of the system, and it may be necessary to experiment with different sensors to find the one that provides the best performance.
Q:what kinds of feedback mechanisms are available for low frequency servo loudspeakers
A:There are several different feedback mechanisms that can be used for low-frequency servo loudspeakers. Some potential options include:
  • Voltage feedback: In this type of feedback mechanism, the output voltage of the amplifier is used to control the position of the speaker cone. The amplifier produces a voltage that is proportional to the desired position of the cone, and this voltage is used to drive the speaker coil. As the speaker cone moves, the coil generates a changing magnetic field, which is detected by the sensor and used to adjust the amplifier's output voltage to maintain the desired position of the cone.
  • Current feedback: In this type of feedback mechanism, the output current of the amplifier is used to control the position of the speaker cone. The amplifier produces a current that is proportional to the desired position of the cone, and this current is used to drive the speaker coil. As the speaker cone moves, the coil generates a changing magnetic field, which is detected by the sensor and used to adjust the amplifier's output current to maintain the desired position of the cone.
  • Hybrid feedback: In this type of feedback mechanism, both the voltage and the current of the amplifier are used to control the position of the speaker cone. The amplifier produces a voltage and a current that are proportional to the desired position of the cone, and these signals are used to drive the speaker coil. As the speaker cone moves, the coil generates a changing magnetic field, which is detected by the sensor and used to adjust the amplifier's output voltage and current to maintain the desired position of the cone.
Ultimately, the best feedback mechanism for a low-frequency servo loudspeaker will depend on the specific design and requirements of the system. It may be necessary to experiment with different feedback mechanisms to find the one that provides the best performance.
Q:What is better : position, velocity or acceleration feedback when used with woofers that operate between 30 and 300hz ?
A:For woofers that operate between 30 and 300 Hz, it is generally best to use position feedback rather than velocity or acceleration feedback. This is because position feedback provides more precise control over the speaker cone, allowing it to produce high-quality sound within the desired frequency range. Velocity and acceleration feedback may be less effective at producing accurate and stable sound at low frequencies, as the speaker cone may not move quickly enough to generate a strong signal for the sensor to detect. Additionally, using position feedback allows the loudspeaker system to maintain a constant phase relationship between the input signal and the speaker cone, which can improve the overall sound quality.
Chris Camphuisen
mfb does to the ear what a pretty face does to the eye
Hans
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Re: Waar zijn we mee bezig ?

Bericht door Hans »

Dat is nog eens een verzameling bla-bla, onzin en halve waarheden! Wauw :(
Groeten,
Hans
ds23man
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Re: Waar zijn we mee bezig ?

Bericht door ds23man »

Ik zat het met verbazing te lezen. :shock:
De Sapman
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