摘要:
A device for measuring a flowing air quantity is proposed which comprises a sensor element which is exposed to the flowing air, is constructed in thick-film technology and contains a heating film resistor (R.sub.H), which is arranged on an insulating substrate (10) and through which current flows, and a sensor film resistor (R.sub.S) which is likewise arranged on the insulating substrate (10), serves to sense the temperature of the heating film resistor (R.sub.H) and is a component of a bridge circuit. The heating film resistor (R.sub.H) and the sensor film resistor (R.sub.S), separated from one another by an intermediate film (13) which is a good conductor of heat but is electrically insulating, are accommodated in a bubble (11) which is made of ceramic material, in particular of glass ceramic, and is arched on the insulating substrate (10). The thin diaphragm (14) made of a ceramic material ensures effective thermal uncoupling of the film resistors (R.sub.H, R.sub.S) from the insulating substrate (10). Short response times are thereby achieved.
摘要:
A fast-responding temperature sensor, for measuring temperature of a medium, features a resistance element (12) formed as a film on an insulating substrate (10). The resistance element is disposed in a bubble or dome (11) of ceramic, preferably glass ceramic, which is formed on, and bowed with respect to, the insulating substrate (10).
摘要:
An electronic device includes a resonant circuit and an evaluation circuit. The resonant circuit includes an acceleration-sensitive sensor which is excited to vibrate during a testing phase of the acceleration-sensitive sensor. The evaluation circuit is coupled to the resonant circuit to determine a performance reliability of the acceleration-sensitive sensor.
摘要:
An electrical circuit unit, particularly for motor vehicles, features a grounded housing (1) and a printed circuit board (2) which, for protection against incoming and outgoing radiation of electrical noise, is short-circuited at high frequencies to the grounded housing. For this purpose, a noise suppression capacitor (6) on the PC board (2) is connected in series to a second capacitor. This second capacitor is formed by a metallized surface (8) on the board (2) and a metal-filled adhesive, as a first plate, a metal inner surface (11) of the housing (1) as a second plate, and an intermediate passivation or eloxal layer serving as a dielectric (13). The metal-filled adhesive acts to electrically bridge most of the gap between the metallized surface (8) and the housing surface (11), thereby capacitively coupling the metal-filled adhesive to the housing (1) and increasing the capacitance.
摘要:
An air bag system is provided for use in a motor vehicle. The air bag system includes at least one air bag module. A multiple level gas generation source is coupled to the air bag module for generating a selected gas generation level applied to the air bag module. An electronic control unit controls the operation of multiple level gas generation source. At least one temperature sensor is coupled to the electronic control unit for sensing ambient temperature. At least one seat belt sensor is coupled to the electronic control unit for sensing seat belt usage. An acceleration sensor is coupled to the electronic control unit for sensing deceleration during a crash. The electronic control unit is responsive to a combination of sensed inputs from the temperature sensor, the seat belt sensor and the acceleration sensor for determining both an optimum gas generation level and inflation sequence times for controlling the multiple level gas generation source.
摘要:
The flexible printed circuit device, includes at least one hybrid circuit structure having assigned contact areas, a rigid printed circuit board, a flexible printed circuit board portion also having assigned contact areas on one end region thereof and being connected electrically to the rigid printed circuit board, a plurality of bonding electrical conductors, each of the electrical conductors being bonded at one end thereof to one of the assigned contact areas on the at least one hybrid circuit structure and, at the other end thereof, to one of the assigned contact areas on the end region of the flexible printed circuit board portion; and a rigid support, the hybrid circuit structure being mounted on the rigid support. The end region of the flexible printed circuit board portion is fixedly mounted on the rigid support in side-by-side relationship with the hybrid circuit structure. A protective frame is provided enclosing the electrical conductors electrically connecting the assigned contact areas on the hybrid circuit structure and the end region of the flexible printed circuit board portion.
摘要:
The holder (1) for an electronic component (20), especially a hybrid module, is preferably a unitary plastic element having an elongated base plate (2) formed with openings (14) therein to permit insertion of terminal pins or lugs (21) projecting from the component therethrough. Two holder arms (30) project from the base plate, the holder arms having module support portions (3) and oppositely projecting posts (4). The posts fit into receiving openings (26, 27) of a printed circuit board, which receiving openings having a spacing (S) which is greater than the distance (D) between the posts so that, upon insertion of the posts in the openings the arms (30) will tilt towards each other, thus clamping a module, typically in card or board form, between the module support (3) of the arms. The holder can also form a transport holder for the module, by forming, for example, in the module a notch spaced from the upper edge, and engaging the notch (22) with a projecting rim (9) formed on the upper ends of the support portions (3) of the arms, the notch being so spaced that the terminal lugs or pins (21) then just fit into the openings (14) in the base plate, thereby protecting the pins against damage.
摘要:
A multi-phase generator has a separately excited shunt field which is controlled by a voltage regulator. A free-wheeling diode is connected in parallel with the field. The voltage regulator is included in a single, hermetically sealed housing which has a metal base plate forming one terminal of the voltage regulator; two insulated terminals project from the voltage regulator and are sealed, in insulated relation, through the housing, preferably the base plate. Three monolithic semi-conductor integrated circuit (IC) chips are located within the sealed housing, two of them soldered to the base plate so that one of the semi-conductor connections of the chip are directly connected to the base plate, the connection being for the collector of the power transistor and the anode of the free-wheeling diode, the control portion of the voltage regulator being secured to a ceramic plate which is attached to the base plate, other terminals from the voltage regulator are being effected internally, by bonding wires, and to the two externally excessible contacts, so that the entire assembly is simple, readily manufactured, and requires little assembly, labor and time for connection to an alternator structure.