DE19838876A1 - Electronic tachometer; has electrodynamic energy supply provided by magnet co-operating with induction coil to provide induced voltage for charging energy storage capacitor - Google Patents
Electronic tachometer; has electrodynamic energy supply provided by magnet co-operating with induction coil to provide induced voltage for charging energy storage capacitorInfo
- Publication number
- DE19838876A1 DE19838876A1 DE1998138876 DE19838876A DE19838876A1 DE 19838876 A1 DE19838876 A1 DE 19838876A1 DE 1998138876 DE1998138876 DE 1998138876 DE 19838876 A DE19838876 A DE 19838876A DE 19838876 A1 DE19838876 A1 DE 19838876A1
- Authority
- DE
- Germany
- Prior art keywords
- induction coil
- energy supply
- magnet
- operating
- storage capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000006698 induction Effects 0.000 title claims abstract description 11
- 230000005520 electrodynamics Effects 0.000 title claims abstract description 8
- 239000003990 capacitor Substances 0.000 title abstract description 6
- 238000004146 energy storage Methods 0.000 title abstract description 3
- 230000006870 function Effects 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 238000011156 evaluation Methods 0.000 description 5
- 230000003750 conditioning effect Effects 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein elektronisches Tachometer nach dem elektrodynamischen Prinzip.The invention relates to an electronic speedometer according to the electrodynamic principle.
Die meisten der bekannten elektronischen Tachometer weisen den Nachteil auf, daß zur Energieversorgung eine oder mehrere Batterien erforderlich sind. Die sich daraus ergebenden Nachteile sind Unwirtschaftlichkeit, hohe Betriebskosten, Recyclingprobleme, Umweltbelastungen durch leere Batterien und eventuell Datenverlust von eingestellten Parametern, wie z. B. Raddurchmesser beim Batteriewechsel.Most of the known electronic tachometers have the Disadvantage that one or more batteries for energy supply required are. The resulting disadvantages are Inefficiency, high operating costs, recycling problems, Environmental pollution from empty batteries and possible data loss from set parameters, such as B. wheel diameter at Battery change.
Der Erfindung liegt die Aufgabe zugrunde, ein elektronisches Tachometer derart auszubilden, daß die erwähnten Nachteile nicht entstehen. Diese Aufgabe wird dadurch gelöst, daß statt der üblicherweise zum Einsatz kommenden Magnetfeldsensoren eine geeignete Induktionsspule (2) Verwendung findet, deren Aufgabe es ist, zusammen mit einem oder mehreren geeigneten Magneten (1) die elektrische Energie für die Spannungsversorgung eines elektronischen Tachometers nach dem elektrodynamischen Prinzip zu liefern. Gleichzeitig kann die Anordnung von Magnet oder Magneten (1) und Induktionsspule (2) auch als Sensor für die Drehzahl oder auch daraus abgeleiteter Größen fungieren.The invention has for its object to design an electronic tachometer such that the disadvantages mentioned do not arise. This object is achieved in that instead of the magnetic field sensors usually used, a suitable induction coil ( 2 ) is used, the task of which, together with one or more suitable magnets ( 1 ), is the electrical energy for the voltage supply of an electronic tachometer according to the electrodynamic Deliver principle. At the same time, the arrangement of the magnet or magnets ( 1 ) and the induction coil ( 2 ) can also function as a sensor for the speed or for quantities derived therefrom.
Die Energieversorgung wird dadurch bewerkstelligt, daß die durch die Bewegung des Magneten (1) in die Induktionsspule (2) induzierte Spannung über eine geeignete Spannungsaufbereitungsschaltung (3) einen Energiespeicher (4) lädt. Die Spannungsaufbereitungsschaltung (3) kann im einfachsten Fall aus einer z. B. mittels einer Diode realisierbaren Spitzenwertgleichrichtung und nachgeschalteter Spannungsstabilisierung bzw. -begrenzung bestehen.The energy supply is accomplished in that the voltage induced by the movement of the magnet ( 1 ) in the induction coil ( 2 ) charges an energy store ( 4 ) via a suitable voltage conditioning circuit ( 3 ). The voltage conditioning circuit ( 3 ) can in the simplest case from a z. B. by means of a diode realizable peak value rectification and downstream voltage stabilization or limitation.
Der Energiespeicher (4) kann im einfachsten Fall aus einem Kondensator geeigneter Kapazität bestehen. Auch die Verwendung eines Akkumulators oder die Kombination von Akkumulator bzw. großen Kondensators mit einem kleineren Kondensator in Verbindung mit einer "intelligenten" Spannungsaufbereitung (3) ist möglich. Der Vorteil einer solchen "intelligenten" Spannungsversorgung (3) ist darin zu sehen, daß die Spannungsversorgung zunächst den kleinen Kondensator schon nach wenigen Umdrehungen aufgeladen hat und überschüssige Energie in den Akkumulator lädt mit dem Ergebnis, daß das Tachometer schon nach wenigen Umdrehungen betriebsbereit ist.In the simplest case, the energy store ( 4 ) can consist of a capacitor of suitable capacitance. It is also possible to use an accumulator or to combine an accumulator or large capacitor with a smaller capacitor in conjunction with an "intelligent" voltage conditioner ( 3 ). The advantage of such an "intelligent" power supply ( 3 ) can be seen in the fact that the power supply has initially charged the small capacitor after only a few revolutions and loads excess energy into the accumulator, with the result that the speedometer is ready for operation after only a few revolutions.
In einigen Anwendungen wird eine Leitung zwischen Sensor und Auswerteelektronik als störend empfunden und durch eine Funkstrecke ersetzt. In einem solchen Fall ist es möglich, nur die Sensoreinheit nach demselben elektrodynamischen Prinzip aufzubauen und die Auswerte- und Anzeigeeinheit üblicherweise aus Batterien, Akkus oder Solarzellen mit Energie zu versorgen.In some applications, a line between the sensor and Evaluation electronics perceived as disturbing and by a radio link replaced. In such a case, it is possible to readjust only the sensor unit to build the same electrodynamic principle and the evaluation and display unit usually made of batteries, rechargeable batteries or solar cells to provide with energy.
Über einen Impulsformer (5) wird aus der Induktionsspannung der Drehzahlimpuls abgeleitet, und der Auswerteelektronik (7) zugeführt so daß ein separater Sensor zur Drehzahlmessung überflüssig ist.The speed pulse is derived from the induction voltage via a pulse shaper ( 5 ) and fed to the evaluation electronics ( 7 ) so that a separate sensor for speed measurement is unnecessary.
Der nichtflüchtige Speicher z. B. EEPROM (6) verhindert einen Datenverlust bei längerem Radstillstand.The non-volatile memory z. B. EEPROM ( 6 ) prevents data loss if the wheel is not used for a long time.
Eingestellte Parameter, wie z. B. Raddurchmesser etc., können über die Anzeigeeinheit der Auswerteelektronik (7) angezeigt oder auch im nichtflüchtigen Speicher (EEPROM) (6) hinterlegt werden. Mittels einer Tastatur können solche Parameter eingegeben und verändert werden.Set parameters, such as B. wheel diameter, etc. can be displayed on the display unit of the evaluation electronics ( 7 ) or stored in the non-volatile memory (EEPROM) ( 6 ). Such parameters can be entered and changed using a keyboard.
11
Magnet
magnet
22nd
Induktionsspule
Induction coil
33rd
Spannungsaufbereitung
Voltage conditioning
44th
Energiespeicher
Energy storage
55
Impulsformer
Pulse shaper
66
Nichtflüchtiger Speicher
Non-volatile memory
77
Auswerteelektronik mit Anzeigeeinheit und evtl. Tastatur
Evaluation electronics with display unit and possibly keyboard
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1998138876 DE19838876A1 (en) | 1998-08-27 | 1998-08-27 | Electronic tachometer; has electrodynamic energy supply provided by magnet co-operating with induction coil to provide induced voltage for charging energy storage capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1998138876 DE19838876A1 (en) | 1998-08-27 | 1998-08-27 | Electronic tachometer; has electrodynamic energy supply provided by magnet co-operating with induction coil to provide induced voltage for charging energy storage capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19838876A1 true DE19838876A1 (en) | 2000-03-02 |
Family
ID=7878830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1998138876 Withdrawn DE19838876A1 (en) | 1998-08-27 | 1998-08-27 | Electronic tachometer; has electrodynamic energy supply provided by magnet co-operating with induction coil to provide induced voltage for charging energy storage capacitor |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE19838876A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3575802A1 (en) * | 2018-06-01 | 2019-12-04 | The Swatch Group Research and Development Ltd | Method and system for measuring speed and/or a distance travelled by a bicycle |
| EP3715858A1 (en) * | 2019-03-28 | 2020-09-30 | The Swatch Group Research and Development Ltd | Method and system for measuring at least one physical parameter for a bicycle |
-
1998
- 1998-08-27 DE DE1998138876 patent/DE19838876A1/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3575802A1 (en) * | 2018-06-01 | 2019-12-04 | The Swatch Group Research and Development Ltd | Method and system for measuring speed and/or a distance travelled by a bicycle |
| EP3715858A1 (en) * | 2019-03-28 | 2020-09-30 | The Swatch Group Research and Development Ltd | Method and system for measuring at least one physical parameter for a bicycle |
| WO2020193107A1 (en) | 2019-03-28 | 2020-10-01 | The Swatch Group Research And Development Ltd | Method and system for measuring at least one physical parameter for a bicycle |
| US11976941B2 (en) | 2019-03-28 | 2024-05-07 | The Swatch Group Research And Development Ltd | Method and system for measuring speed and distance of a bicycle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8122 | Nonbinding interest in granting licenses declared | ||
| 8139 | Disposal/non-payment of the annual fee |