Cadence detection: Definition of cadence correction | PCMag

3 марта, 2023

Definition of cadence correction | PCMag

The restoration of the original frame sequence in video material. It is commonly used to reverse the telecine process that converted movies shot on film into interlaced video, back into the original 24 frames-per-second progressive film sequence. Cadence correction is part of deinterlacing, which, in order to apply the appropriate algorithm, must determine if the original movie was shot with a film or video camera. Also called «cadence detection,» «film mode detection,» «reverse telecine,» «inverse telecine» and «reverse 3:2 pulldown.»

Advanced correction circuits can detect almost any repeating cadence, such as 2:3:3:2, 3:2:3:2:2, 3:3, etc., which can be the result of splicing video and film clips together as well as careless editing in the studio. See deinterlace and telecine.

Correcting Cadence
Algolith’s Dragonfly removed the telecine cadence in this example to restore the original progressive frame sequence at the bottom. The Dragonfly is a separate, high-end component used in home theaters (see videophile). (Image courtesy of Algolith Inc., www.algolith.com)

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Cadence and Torque Sensors

Contents

  1. Cadence Sensors
  2. Torque Sensors (Torque Sensors)
  3. Are Torque Sensors Always Better?
  4. Are torque sensors worth the extra money?

Before you buy an e-bike, you should understand the difference between a cadence sensor and a torque sensor. These sensors “tell” the e-bike motor how much assistance needs to be provided. The type of sensor determines the pedaling experience and battery consumption. nine0003

Some cyclists find the difference between a cheaper cadence sensor and a more fancy and expensive torque sensor to be huge. They are confident that the sensors make a big difference in ride quality.
For other cyclists, torque sensors are not worth the money. They are quite satisfied with the cadence sensor. As a result, we have two religious sects. Whatever you get into, it will be useful for you to know the difference between these two electronic things. nine0003

Cadence sensors

Cadence sensors were the first to be introduced on e-bikes. They measure how fast you pedal using a group of magnets located around the cranks. An e-bike can have 8-14 magnets arranged in a circle. When motion is detected, the sensor tells the motor that it is time to start working.

Swytch’s regular bike electrification kit uses a 12-magnet cadence sensor. nine0026

E-bikes with a cadence sensor are designed in such a way that the engine power depends on the cadence and the selected cadence assist level. For example, if your bike is set to low pedal assist, then the motor will have a certain amount of power it can provide at a given cadence.

Almost all e-bikes under $1,500 only have a cadence sensor. nine0003

Torque sensors (torque sensors)

Torque sensors () measure how hard you press the pedals .

At first glance, it might seem that cadence is directly related to effort. This is partly true, but not always. For example, when climbing a hill, carrying a heavy load or starting off, you will need more power than when driving on a flat road. Likewise, you probably want your e-bike to have less motor assist when going downhill. Since the torque sensor constantly analyzes force rather than simply responding to rotation, it can adjust the motor assistance more dynamically and appropriately to the particular situation. nine0003

Let’s say you were driving on a level road and then you start up a hill. On a bike with a cadence sensor, you’ll get the same amount of motor power as you climb uphill as you would on level ground. If you had a weak pedaling assist mode set when riding on flat terrain, you can increase the assist by switching to a more powerful pedaling mode before starting to climb.

Juiced Bikes offers a combined cadence and torque sensor system

With a torque sensor, the engine power can be varied more widely and dynamically. In some cases, you won’t need to switch to the more powerful hill assist mode because the ebike’s controller will «know» that you need more motor assistance.

E-bikes equipped with cadence sensors in powerful support modes may jerk when pedaling starts, as the motor is putting in too much power. Systems equipped with rotation sensors tend to take longer to «calculate» your cadence. nine0003 Sample HTML page

An e-bike with a torque sensor better «understands» when and how much power the motor needs for an adequate support situation. If you pedal softly and carefully (say, when riding on slippery substrate), the bike won’t put out a ton of power, even if you set the support level to high.

An e-bike with a torque sensor well integrated into the system will feel almost like a regular bike without a motor. It will just seem to you that you have very powerful legs. nine0003

E-bikes equipped with torque sensors use only as much power as needed, so they use the battery more sparingly. But you have to pay for everything. Torque sensors are complex electronic components and are therefore much more expensive to manufacture. Most e-bikes with torque sensors cost more than $2,000. If a bike’s specification does not specify a sensor type, it will almost certainly only use a cadence sensor. nine0003

Are torque sensors always better?

In my experience, yes. But there are some nuances to be aware of. Some e-bikes with cadence sensors use smoother power delivery curves and/or have more magnets that «read» cadence at shorter intervals.

The Shimano Steps E5000 motor uses a torque sensor.
This graph shows that both High and Normal support modes can provide the same maximum level of assistance. It’s just that in «High» mode, the power builds up faster with less effort on your part. nine0026

If you need a throttle, you are more likely to find it on ebikes with cadence sensors. This is because most torque-sensing e-bikes have center motors, and most of which do not support «throttle» handles.

Throttle compatible bottom bracket motors: Bafang Ultra Max, Bafang BBS01, BBS02 and BBSHD, Tongsheng.

People with sensitive or sore joints may prefer ebikes with rotation sensors as they can be ridden with little effort. Just enough to pedal. nine0003

Are torque sensors worth the extra money?

* If you are passionate about mountain and technical trails.
* If you don’t mind the extra thousand dollars for a better e-bike.
* If you are a fan of modern technologies in ebike breeding.

* If an e-bike is just a vehicle for getting from home to work, transporting goods, or for business or pleasure trips.
* If you drive on the plain. nine0003

If possible, try testing e-bikes with different sensors. No texts or videos will help you understand the nuances of the differences between these two systems.

Source
Author author: Napier Lopez
Translation: Dmitry Konstantinov
Photos of manufacturers

pedals of pedals Magene S014 ONELAP Trainer with Bluetooth 9000 9000 9000

drem0023
FCC ID: 2ALZG-S014

Trainer cadence sensor introduction When the battery is installed, the red indicator flashes to indicate the

sensor is in cadence mode.

  1. Red mode indicator
  2. Battery lock/unlock indicator
  3. Silicone Gasket Installation Location

Trainer Cadence Sensor Installation

*A new cadence sensor comes with a battery insulating sheet that must be removed from the battery compartment before use.
Cadence Sensor Mode
1. Remove and reinstall the battery, the red light will turn on to indicate that the sensor is in cadence mode.
2. Place a flat silicone gasket on the bottom of the sensor and install the sensor on the inside of the left crank with the rubber ring. nine0017 3. Turn the handle and search for the cadence sensor using the Bluetooth device.

Note:

  • Rotate the crank to wake up the sensor. The sensor will be found in the list of connected devices within 60 seconds after waking up. If it is not connected within 60 seconds, the sensor will stop sending Bluetooth broadcast messages, preventing the software from detecting it. If this happens, stop crank rotation for 3 seconds and then repeat the wake-up operation. nine0006
  • After installing the sensor, make sure that the sensor and rubber ring do not rub against your shoes or bicycle while riding to avoid damage or loss of the sensor during use.
Download One lap

One lap is an application specialized in indoor cycling training.
Diverse workout types meet your different fitness needs with realistic outdoor cycling experience.

http://www.onelap.com

scan the QR code to join the game

One lap cycling(1)

When you log in to the One lap APP for the first time, you can connect it to the training module according to the prompts of the software or follow the steps below.

  1. Click «Login» to enter the One lap application.
  2. Select «Settings» and then click «Device» for SPIN BIKE.
  3. Select SPIN BIKE on the pairing screen. nine0006
  4. Find the corresponding Bluetooth ID, click on it, and the name of the connected device will be displayed.
  5. Confirm your bike type: freewheel or fixed gear
  6. Select «QUICK GAME» and then press «WORKOUT».
  7. Select Improve Metabolic Rate and then do a One Lap cycle.
Single Lap Cycling(2)

Note:

  • The sensor will only start sending Bluetooth broadcast messages after it has been properly installed and activated. You can then use the appropriate device or app to search and connect. nine0006
  • When using the Bluetooth protocol, you can only connect to one device or application at a time. Please disable your previous device or app if you want to replace it.
  • When using the smartphone app, you need to search for the module in the app, searching in the Bluetooth settings of the phone system is invalid.
  • After the sensor is removed, it will automatically go into sleep mode for 60 seconds to save power.
    • IP66 Type of battery and service life CR2032, 3 V, 1 year, 1 hour/day Frequency wireless

    .5 MHC

    .5 MHz batteries are subject to temperature and environmental influences.

    Battery replacement
    1. Open the battery compartment by turning the position mark on the battery cover counterclockwise from the locked position to the unlocked position. nine0006
    2. Place a new battery in the battery compartment and press the battery cover until the marker aligns with the unlock indicator (as shown below). After the battery cover is fully pressed in, turn the battery cover clockwise to align the indicator with the locked position.
    FAQ
    1. Why is the sensor not detected by other equipment if it has not been used for a long time? nine0023
      A: To conserve battery power, the sensor will go into sleep mode if no data is detected for 1 minute. Normal broadcasting will resume when the device is in use.
    2. Why doesn’t the light come on when I reinstall the battery?
      A: It is possible that the battery connector is covered with foreign matter or the spring is not depressed.
      If the connector is clean and spring loaded, replace the battery with a new battery (battery model CR2032-3V).
      If the problem is not resolved, contact online support. nine0006
    3. Why can’t the sensor be detected by other equipment? You should check:
      • Make sure the sensor is in the correct mode. Red: Cadence
      • Is the software compatible.
      • Are there any inductive magnets causing interference.
      If the battery is dead, replace it with a new one.
      • If the problem is not resolved, contact Technical Support Online.
      • support service.
    4. Is there a delay in the sensor data? nine0023
      A: The cadence sensor uses geomagnetic sensor measurement data, abandoning the traditional magnet detection circuit, the installation is more convenient, but there is a certain delay in the calculation of the data, but the main reason for the data display delay is that the device uses the averaging algorithm to smooth data.
    FAQ

    5. How many hours can the cadence sensor be used?
    A: Battery life is approximately 12 months at 1 hour per day (differs due to temperature and environment). If it is not paired with One lap APP, please do not install it, which will keep the sensor in the Bluetooth broadcast state and speed up power consumption. nine0003

    Feel free to contact us if you have any questions or concerns:
    email: [email protected]
    Website: www.