Sounder control system
AssigneeRobert Bosch GmbH
InventorsWalter Friedrich Strohbeck, Roderick John Pettit
Life of this patent
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Abstract
A sounder control system, including a converter circuit for converting a drive signal to a signal for activating a sounder and a drive circuit for generating the drive signal. The drive circuit includes a microprocessor for receiving at least one input signal representative of one of a plurality of control parameters for the sounder control system and for adjusting the drive signal on the basis of the at least one input signal, such that the sounder exhibits a predetermined sound pressure level characteristic.
Claims19
A sounder control system, comprising:
- a sounder;
- a drive circuit for generating a drive signal, the drive circuit including a microprocessor for receiving a voltage signal representative of a level of a supply voltage for the sounder control system and for adjusting the drive signal on the basis of the voltage signal, such that the sounder exhibits a predetermined sound pressure level characteristic;
- and
- a converter circuit for converting the drive signal to a signal for activating the sounder.
A sounder control system, comprising:
- a sounder;
- a drive circuit for generating a drive signal, the drive circuit including a microprocessor for receiving a temperature signal representative of a temperature inside a housing of the sounder control system and the sounder and for adjusting the drive signal on the basis of the temperature signal, such that the sounder exhibits a predetermined sound pressure level characteristic;
- and
- a converter circuit for converting the drive signal to a signal for activating the sounder.
A siren control system, comprising:
- a sounder;
- a transformer including a secondary coil and a primary coil, the secondary coil connected across the sounder and the primary coil;
- a switch connected to the primary coil to cause a current to flow in the primary coil when the switch is activated;
- and
- a control device for controlling an activation of the switch, such that the sounder exhibits a predetermined sound pressure level characteristic;
- wherein the predetermined sound pressure level characteristic corresponds to a sound pressure level that is substantially constant for a range of the predetermined sound pressure level characteristic;
- wherein the control device generates a PWM signal to activate the switch;
- and
- wherein the PWM signal includes a pulse width determined based on a level of a supply voltage for the primary coil.
Dependencies are inferred from the claim text.