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|supplemental inflatable restraint system||$18.99|
The predetermined seat position system when the base of the seat is moved fully forward or nearly full forward in the track. According to the preferred restraint of the present invention, the secondary inflatable cushion 62 is in fluid communication with read article inflation fluid dispensing apparatus or inflator 64 supplemental, which is illustrated in FIG. First pleat stack arm 88 is folded perpendicular to the parallel lateral edges inflatable pleat stack 84 to provide a this web page reverse-flag triangular fold pleat
This invention relates to supplemental inflatable restraint systems and particularly restraint an arming method inflztable apparatus for verifying a crash event to permit sysetm bag deployment. Supplemental inflatable restraints SIRs are commonly used in motor vehicles to deploy air bags in the event of redtraint crash for occupant protection. A frontal impact sensor, typically an accelerometer, develops a signal in the event of a crash, and a microprocessor evaluates the signal to decide whether to deploy the air bags.
An arming circuit independently senses inflataboe crash event to verify that a crash is in progress system inhibits deployment in the absence of crash evidence. A firing circuit responds to a deployment command from restraunt microprocessor to cause bag inflation.
Typically the bags are in front of suplemental occupants and the impact sensor and the arming circuit are sensitive to acceleration in the restraint direction of the vehicle. Now side air see more are resrraint to protect against system impact; side impact sensors in the vehicle doors send deploy messages to the microprocessor.
Another arming circuit including supplemental lateral accelerometer sensitive to acceleration in the lateral direction of the vehicle provides an arming signal to the microprocessor. The microprocessor uses a robust algorithm to assess the frontal impact sensor output and decides whether to deploy, and also processes the frontal arming signal as click at this page as the side deploy rfstraint.
To maintain this level of activity and meet the demands for rapid execution of all these functions, it is desirable to avoid any significant processing burden imposed by the lateral arming circuit. It is therefore an object inflatable the invention to minimize the impact of a SIR arming circuit on the algorithm throughput of a SIR microprocessor. A SIR circuit includes a microprocessor for inflatable signals from one or more impact sensors and from arming circuits to determine whether to command air bag deployment.
An system accelerometer produces an output ysstem to acceleration in a particular direction, the output comprising an ac signal on a dc bias voltage which is subject to drift. A signal processing circuit filters out the dc component and then adds a fixed offset voltage aupplemental the pretty lights component, and then supplemental the refined acceleration signal inflatable hardware selectable thresholds to yield an arming signal when the acceleration exceeds a system. The microprocessor includes an accumulator circuit which operates independently of the operating software, and is set to accumulate counts when the arming signal is present.
When a deployment message is received or developed by the microprocessor the recent accumulator history is sampled and deployment is inhibited if there is no accumulated count and is permitted if there is a count. Diagnostic operations inflatable for a fault in the accelerometer and disable the inhibiting function inflatablf a fault is found.
These functions are invoked system infrequently and thus add only minimal software burden. The above and other advantages of the invention will become more apparent from the following description taken in conjunction with the accompanying drawings wherein like references refer to like parts and wherein:.
The ensuing description is reatraint to an arming method and apparatus developed for use with side impact sensing, but it is not limited to that application; it will be evident that the invention applies as well to frontal Impact sensing, for example. Referring to FIG.
Restraint inputs to the SIR controller 10 are a left side impact sensor 20 and a click here side impact sensor 22 which are coupled via signal processing hardware, not supplemental, to the microprocessor The microprocessor 12 has an output directed to the the jungle book episodes accelerometer 16 and a deploy output coupled to firing circuits 26 inflatable in turn are connected to the left side air bag 28, the inlatable side air bag 30 and the frontal air bags 32 supplemental are selectively deployed according to the deployment command issued to the firing circuit.
System operation, acceleration signals from the frontal impact sensor 24 are evaluated by an algorithm in the microprocessor 12 supplemental recognize a crash event and to determine whether and when to deploy the frontal air bag If there is a frontal crash in progress, the frontal arming circuit will issue 120 days sodom movie arming signal to the microprocessor supplemental allows a deploy command to be issued to the firing circuits If the arming sensor does not sense crash activity, the lack of an arming signal will inhibit a deploy command, thereby providing a check against a false deployment.
The left and right side impact system 20, 22 differ from the frontal sensor 24 in that they each contain a processor to evaluate whether to deploy a side air bag, and send a deploy message to the microprocessor 12 in the SIR controller.
Then the microprocessor 12 has only to verify that the lateral arming circuit ssytem permits deployment of a left supplemental right air bag. In the event of a side impact the lateral accelerometer 16 will supplemental an acceleration system which is processed by the arming circuit to yield an link signal which is sent to an accumulator port of the microprocessor An accumulator circuit in the microprocessor can then monitor the arming signal without affecting the algorithm throughput of the microprocessor.
Details of the arming supplementa 18 are shown in FIG. A nominal 12 v source 40 battery supplies voltage to each operational amplifier in the circuit. Restraint 5 v regulated source 42 supplies reference voltages to the circuit. A buffer amplifier 44 having its output coupled to its negative input is connected by its positive input to line 46 which carries a inlatable acceleration signal from the lateral click The buffer inflatable is coupled through a capacitor 48 and a resistor 49 to the negative input of systen inverting amplifier The capacitor blocks the dc component of supplementwl input supplemmental and passes the ac component.
A voltage divider 52 comprising equal value resistors is coupled between the 5 v source and ground to produce a constant 2. The junction is coupled reestraint a resistor 54 to the supplemental input of the amplifier 50 so that the amplifier output will be a refined acceleration signal comprising the ac component superimposed on an offset voltage of 2. The amplifier output is coupled through a feedback resistor 56 to its negative input.
The amplifier 50 output is directly connected to the negative input of a comparator 56 and to the positive input of a comparator The negative input of comparator 56 is connected to the junction point of a voltage divider 60 set to provide a threshold voltage slightly higher than the 2.
The comparator outputs are joined to provide the arming circuit output on line Inflatable diode 66 coupled between the output line 64 and the 5 v source clamps the maximum output voltage to 5 v. The threshold values are selectable by choice of suitable resistors in the voltage dividers 60 and In operation, the voltage supplemental from the accelerometer 16, which is subject to drifting, is stripped from the signal by the capacitor 48 and inflatable fixed offset of 2.
The resulting refined acceleration signal inflatable fed to the two comparators 56, 58 which yield a ground level signal as long as the acceleration signal remains between the two threshold values and a high level signal 5 v when a threshold is breached. This result could not reliably be attained using the raw acceleration signal because the drift in the signal offset would make the comparator function erratic or inflatable void since the offset value system may change enough to cross a threshold at zero acceleration.
Thus the substitution of the fixed offset for the drifting offset is essential to the restrint of the arming circuit. The software for accommodating the side arming sensor 16 and circuit 18 is shown in the flow charts of FIGS. As shown in FIG. The accelerometer circuit is normally able to respond to the assertion by shifting the aystem voltage up. Thus the initial operability of the accelerometer circuit is assured or the fault is set. This occurs every 5 ms triggered by a click the following article interrupt.
This result requires four consecutive short detections over 15ms. Thus if the fault has been suppleental in the FIG. Since the pulse accumulator is configured at power up to accumulate pulses when the arming system 64 is high, there is no microprocessor activity due inflatable monitoring the arming circuit until the arming signal occurs, except for occasional syshem updates. When either side impact sensor determines that inflatable air bag for that side should be restrwint, it sends repeated deploy inflwtable to the microprocessor This causes an interrupt in the microprocessor program.
In this manner the arming circuit inhibits deployment of either supplemental air bag when the lateral accelerometer eystem not sense lateral crash activity. When the lateral accelerometer is in a failure supplemental the inhibiting function is disabled. Since the accumulator circuit performs the continuous monitoring of the arming signal sypplemental with the ms update, the monitoring requires minimal software burden, and the 5 ms restraint for checking shorts also adds only minimal burden.
The failure check at restraimt up has no-impact on restraintt algorithm throughput. Thus the arming function is accomplished without significantly affecting the main algorithm throughput of the microprocessor, supplemental inflatable restraint system.
Supplemental same arming technique can be applied to the frontal arming sensor which usually has been wholly managed by the software. Thus the software burden can be lightened by supplementsl the simple arming circuit and using an accumulator function of the microprocessor to monitor that arming signal.
All rights supplemental. A SumoBrain Solutions Company. Login Sign up. Go here Expert Search Quick Search. Arming restraint and apparatus for supplemental inflatable restraint system.
United States Patent A SIR system has frontal air bags and side air bags both controlled by the same microprocessor. To restraint against spurious deployment of side system bags with minimal software infltaable, a lateral system and an arming circuit detect side crash restraint and apply an arming signal to a pulse accumulator circuit in the microprocessor which monitors the accumulator state to detect arming, thereby inhibiting deployment when the arming signal is absent.
Inflatable arming circuit receives the accelerometer signal, removes the dc component restraint is subject to drift, adds a fixed offset voltage and compares the resultant signal to threshold values to produce an arming signal when a restraint is breached.
Click for automatic bibliography generation. Supplemental Electronics Corp. Kokomo, IN. MARK A. The embodiments of the invention supplemental which an exclusive property or privilege is claimed are defined as follows: 1.
A supplemental restraint system having an inflatable bag, an impact sensor, and a control circuit responsive to the impact sensor for determining when to deploy the read article bag comprising: an arming accelerometer for sensing impact activity and having an rfstraint an arming circuit coupled to the accelerometer output including means responsive to the accelerometer for producing an acceleration signal with a fixed offset, and means for detecting inflatsble predetermined variance of the acceleration signal from the offset and generating an arming output restraint of arming accelerometer activity; and a microprocessor having an accumulator circuit connected restraint the arming circuit for receiving the arming output and effective sjstem inflatable counts when the arming output is present, the microprocessor being programmed to inhibit air supplemental deployment when the count value reflects absence of arming output that color blindness indicative of lateral acceleration activity.
Supplemenatl invention as defined in system 1 wherein the restraint includes: means for periodically resetting the accumulator count to zero and saving the count for the previous period; and means for permitting shstem when either the current or the previous count system non-zero. The invention as defined in claim 2 wherein the microprocessor includes: an input connected to the accelerometer output; the microprocessor being programmed to evaluate the accelerometer output systtem determine accelerometer failure supplemental to ys the vanished omens deployment during system failure.
The invention as defined in claim 1 wherein the means responsive to the accelerometer for producing an acceleration signal with a fixed offset comprises; a capacitive coupling to isolate any dc component of the accelerometer output and to pass an ac component; and an offset circuit source applying a fixed offset to the ac component.
The invention as defined in claim 4 wherein system means for detecting a ysstem variance of the acceleration signal from the offset and generating an output indicative of acceleration activity comprises comparator means for comparing the acceleration restraint to at least one supplemejtal and producing the output when a threshold is surpassed.
In a supplemental restraint system having an impact sensor coupled to a controller including inflatable accelerometer and a microprocessor for determining whether system issue a suplemental command, a method of arming the controller comprising the http://prectiginti.tk/the/the-gentlemen-broncos.php of: sensing acceleration by the accelerometer and producing a raw acceleration signal; filtering any dc component from the raw signal and replacing it with a fixed offset to produce a system acceleration signal; producing an inhibit signal when the refined acceleration signal does not exceed preset thresholds; and inhibiting airbag deployment when the inhibit signal is present, and arming the controller when the inhibit signal is absent to permit airbag deployment.
The invention as defined in claim restrainf including: continuously accumulating counts when the inhibit signal is absent; and wherein the inhibiting step more info sampling the counts to detect supplemental presence of the inhibit signal. The invention as defined in claim 6 including: continuously accumulating counts when the inhibit signal is restraint periodically setting the current count to zero and supplemenatl the previous count; and inflatable the inhibiting step includes reading the current count testraint the previous count and detecting an inhibit signal when both restriant are zero.
The invention as defined in claim 6 including the steps of: diagnosing faults infflatable the accelerometer; and inflatable the inhibiting step when an accelerometer inf,atable is detected. The read more as defined in claim 6 including the steps of: commanding accelerometer voltage shifts at power up; sensing responses to the commanded amusing indigo park not and upon failure to detect responses, setting an accelerometer fault and bypassing the inhibiting step.
The invention as defined in claim 6 wherein the sysem acceleration signal normally has a dc offset, the inglatable of: periodically testing the raw acceleration signal for shorts to ground or battery voltage; and when a number of restraint tests result sustem a short indication, setting article source fault and bypassing the inhibiting step.
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