CN201338576Y - Contact-type broken-circuit and short-circuit two-state automobile passenger sensor - Google Patents

Abstract

The utility model discloses a contact-type broken-circuit and short-circuit two-state automobile passenger sensor. A plurality of through holes are arranged on a clapboard, and the two surfaces of the clapboard are sequentially compounded with wafer-shaped conductive compounded laminar structures comprising conductive carbon paste layers and conductive silver paste layers; and wafers are positioned at the through holes to form a trigger switch. Conductive silver paste at one side of the clapboard is first electrodes and second electrodes, which form two groups independent from each other and are connected with a vehicle control system. Conductive silver paste at the other side of the clapboard is third electrodes. A bottom film bearing body and a pressure-sensing film bearing body that are composed by insulating films are compounded outside the conductive silver paste layers to form laminar structures. When no external pressure is added, the first and the second electrodes of the sensor form a broken-circuit state; and when an external force acts on the sensor, the first and the second electrodes are connected with each other by the third electrodes to form a short-circuit connection state. Due to the adoption of two contact-type states, i.e. the broken-circuit state and the short-circuit state, to judge whether a passenger is in, the sensor overcomes the defects of complex circuit and incorrect sensing information of existing piezoelectric type crash sensors.

Description

Contact opens circuit and short circuit bifurcation automobile passenger perceptron

Technical field:

A kind of contact that discloses the utility model opens circuit and short circuit bifurcation automobile passenger perceptron, and whether the passenger seat that is used for the machines motor-car is occupied, belongs to vehicle safety detector technical field.

Background technology

In the vehicle in modern times, seat occupancy sensor is used widely, so that whether detect passenger seat occupied.Can use subsequently about the information that passenger seat takies, so that control is to the expansion of one or more air bags that are associated with seat.Present most of sensor is to adopt the piezoelectric type crash sensor, and it is that electric charge mouth at common piezoelectric transducer connects built-in circuit, and the piezoelectric element of sensor is as the feedback element of op amp in the built-in circuit.Circuit complexity in this sensor, and easily go wrong, it is accurate that amplifying signal is difficult to, so sensor senses is not very accurate.

The utility model content

A kind of contact that discloses the utility model opens circuit and short circuit bifurcation automobile passenger perceptron, the employing contact opens circuit and the short circuit two states is a switch, serviceability is safe and reliable, and is economical and practical, overcome existing piezoelectric type crash sensor circuit complexity, the inaccurate shortcoming of sensory information.

The utility model technical solution is as follows: dividing plate is made of the insulation adhesive tape, is distributed with some through holes on it; The compound successively conductive composite layer shape structure that is made of conductive carbon paste layer and conductive silver slurry layer in the two sides of dividing plate, conductive silver slurry layer and conductive carbon paste layer are respectively some contact shapes and constitute, and contact is positioned at the lead to the hole site place of dividing plate, constitute trigger switch; The conductive silver paste of dividing plate one side be two groups independently first, second electrode connect vehicle control system; The conductive silver paste of dividing plate opposite side is a third electrode; End film supporting body and pressure sensitivity film supporting body that insulation film constitutes are compounded in conductive silver slurry layer and constitute laminar texture outward;

The utility model is arranged at perceptron between the covering and foaming of seat when using, and whether it is subjected to ambient pressure to come sensing, and no ambient pressure is done the time spent on perceptron, and first, second electrode of conductive silver slurry layer becomes off state; When external force acted on the perceptron, first, second electrode connected and composed the short circuit coupled condition by the third electrode of conductive silver slurry layer.There are two states in perceptron, off state and short-circuit condition, and send signal to vehicle control system, and then judge the existence whether occupant is arranged on the seat.

The utility model is with respect to the advantage that prior art has: the employing contact opens circuit and the short circuit two states is a switch, serviceability is safe and reliable, economical and practical, overcome existing piezoelectric type crash sensor circuit complexity, the inaccurate shortcoming of sensory information, guaranteed the safety of vehicle.

Description of drawings

Fig. 1 is the utility model structure principle chart;

Fig. 2 is the utility model working state schematic representation.

The specific embodiment

According to shown in Figure 1, the utility model constitutes laminar texture by end film supporting body 7 and the pressure sensitivity film supporting body 1 that dividing plate 4, conductive carbon paste layer 3,5 and conductive silver slurry layer 4,6 and insulation film constitute.Wherein, dividing plate 4 is made of the insulation adhesive tape, is distributed with some through holes 8 on it; The two sides of dividing plate 4 is compounded with the conductive composite layer shape structure of conductive carbon paste layer 3,5 and conductive silver slurry layer 2,6 formations successively, conductive silver slurry layer 2,6 and conductive carbon paste layer 3,5 are some contact cascaded structures, contact is positioned at the lead to the hole site place of dividing plate 4, constitutes trigger switch; Conductive silver paste 6 be two groups independently first, second electrode connect vehicle control system; Conductive silver paste 2 is a third electrode; End film supporting body 7 and pressure sensitivity film supporting body 1 that insulation film constitutes are compounded in conductive silver slurry layer 2,6 outer formation laminar textures.

According to shown in Figure 2, during no ambient pressure, first, second electrode of conductive silver slurry layer 6 becomes off state in the perceptron; When external force acted on the perceptron, first, second electrode that extruding makes conductive silver slurry layer 6 connected and composed the short circuit coupled condition by the third electrode of conductive silver slurry layer 2, connect the detection that vehicle control system realizes having or not in the car occupant.

Claims (1)

1, a kind of contact opens circuit and short circuit bifurcation automobile passenger perceptron, it is characterized in that: dividing plate (4) is made of the insulation adhesive tape, is distributed with some through holes (8) on it; The two sides of dividing plate (4) is compounded with the conductive composite layer shape structure of conductive carbon paste layer (3), (5) and conductive silver slurry layer (2), (6) formation successively, conductive silver slurry layer (2), (6) are some contact cascaded structures with conductive carbon paste layer (3), (5), contact is positioned at through hole (8) position of dividing plate (4), constitutes trigger switch; Conductive silver paste (6) be two groups independently first, second electrode connect vehicle control system; Conductive silver paste (2) is a third electrode; End film supporting body (7) and pressure sensitivity film supporting body (1) that insulation film constitutes are compounded in conductive silver slurry layer (2), (6) outer formation laminar texture.

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