The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 1990
Filed:
Oct. 14, 1988
Jonathan Castle, Mission Hills, CA (US);
Moore Industries-International, Inc., Sepulveda, CA (US);
Abstract
A wireless weighing system for determining the weight of each wheel of a vehicle and for combinations and percentages thereof. Wheel weighing pads are placed under respective wheels of the vehicle and each contains a load cell whose analog output is converted to a digital value which can be transmitted to a central control. The communications technique uses infra-red radiation and a digital protocol which allows the central control to interrogate each individual weighing pad and receive a weight response without interference. The interrogation signal of the central control comprises a series of pulse envelopes containing high intensity IR pulses of a short duration where the duration of the envelope and position in the sequence indicates an address of a respective wheel pad. As each wheel pad is interrogated, it responds with an information signal, which comprises a series of pulse groups in an envelope containing high intensity IR pulses of a short duration where the duration of a pulse group indicates the presence or absence of a data bit in the sequence.