Controlling and monitoring circuit for electrical seat heating means, especially of automotive vehicles
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H05B-001/02
출원번호
US-0458681
(1990-02-01)
우선권정보
DE-3818974 (1988-06-03)
국제출원번호
PCT/EP89/00608
§371/§102 date
19900201
(19900201)
국제공개번호
WO-8912268
(1989-12-14)
발명자
/ 주소
Lorenzen Gnter (Olching DEX) Ruthenberg Bodo (Munich DEX)
출원인 / 주소
Warme-undEletrotechn (DEX 03)
인용정보
피인용 횟수 :
20인용 특허 :
0
초록▼
Fast and highly sensitive monitoring of electrical resistance-type heating elements of seat heaters in automotive vehicles is achieved by short-time breaking of the power supply to the electrical resistance-type heating element and coupling the electrical resistance-type heating element during this
Fast and highly sensitive monitoring of electrical resistance-type heating elements of seat heaters in automotive vehicles is achieved by short-time breaking of the power supply to the electrical resistance-type heating element and coupling the electrical resistance-type heating element during this interruption to an electrical measuring section for applying to the electrical resistance-type heating element a measuring current which is significantly lower than the heating current. A controlling and monitoring circuit operating in this way permits testing of the electrical resistance-type heating element for a plurality of types of faults within a wide range of operating conditions.
대표청구항▼
A controlling circuit for the heating current of electrical seat heating means, especially for automative vehicles, comprising a heat current source (UB) for the electrical resistance-type heating element (11), a measuring current source for supplying an essentially lower measuring current to the he
A controlling circuit for the heating current of electrical seat heating means, especially for automative vehicles, comprising a heat current source (UB) for the electrical resistance-type heating element (11), a measuring current source for supplying an essentially lower measuring current to the heating element (11), further comprising an interruption circuit (12-17, 35, 20, 21, 10) for the heating current, and a measuring section (25) for the resistance of the heating element (11) which includes comparator means (31, 32) for comparing the measured resistance signal of the heating element (11) with corresponding reference signals supplied from adjustable reference voltage sources (27, 28, 29, 30), and comprising a connection circuit (33) for supplying an output signal of the measuring means which depends on the said comparison, to an output line (34), a) wherein the output signal of the measuring means (25) is an error signal which switches off the seat heating means in the case of a defect, b) wherein a first reference voltage source (29, 30) supplies a first reference value corresponding to the short-circuit resistance of the heating element (11), c) wherein a second reference voltage source (27, 28) supplies a second reference value corresponding to an interruption of the heating element (11), d) wherein the connection circuit (33) is a OR circuit which supplies an interruption signal to the exit line (34), if an exit signal is present at one of both comparison means (31, 32) corresponding to a short-circuit or to an interruption of the heating element (11), e) wherein a resistance (13) which is dependent on the temperature, is provided in the area of the heating element (11), but is without electrical contact with this heating element, which resistance (13) is compared with an adjustable temperature reference value in a temperature comparator (17) for supplying a corresponding output signal, f) wherein the output signal of the temperature comparator (17) activates a pulse generator (20) to supply an input pulse to the switch (10) for supplying heating current, as long as this output signal is present and the temperature of the heating element (11) is below an adjusted reference value, g) wherein between two input pulses (1.997 sec) a short output pulse (0.003 sec) is provided, h) and wherein the pulse generator (20) supplies an input signal to a measuring switch (24) via a further output line (23) only during this output pulse, such that in essence the measuring means (25) is activated at the same time in which the heating current switch (10) is interrupted.
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이 특허를 인용한 특허 (20)
Topp Rainer,DEX ; Materna Gerald,DEX, Circuit for temperature-dependent regulation of the heating current of seat heaters.
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Sheppard Clyde H. (Boeing Aerospace Company ; P.O. Box 399 ; M/S 73-09 Seattle WA 98124-2499) Lubowitz Hyman R. (26 Coral Tree Ln. Rolling Hills Estates CA 90274), Methods for making liquid molding compounds using diamines and dicyanates.
Dubos Laurent,FRX ; Duval Thierry,FRX, Thermal overload protection system providing supply voltage reduction in discrete steps at predetermined temperature thr.
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