CN2718960Y

CN2718960Y - Anti-water immersing data memery module for vehicle black box

Info

Publication number: CN2718960Y
Application number: CN 200420060212
Authority: CN
Inventors: 严德生
Original assignee: Sitong Ducheng Science And Technology Development Co Ltd Chongqing
Current assignee: Sitong Ducheng Science And Technology Development Co Ltd Chongqing
Priority date: 2004-07-09
Filing date: 2004-07-09
Publication date: 2005-08-17
Anticipated expiration: 2014-07-09

Abstract

The utility model relates to an anti-water immersing data memory module for vehicle black boxes, comprising a memory 1, a circuit board 5, an insulated heat resistant casing 2, an insulated heat resistant and anti-water immersing filler 3 and a socket 4. The utility model is characterized in that the insulated heat resistant casing 2 is arranged on the peripheries of the memory 1 and the circuit board 5. The insulated heat resistant and anti-water immersing filler 3 is embedded on the housing 2 and between the memory 1 and circuit board 5. The circuit board 5 is connected with the socket 4 whose one end extends out of the housing 2. The circuit board 5 is provided with an anti-water immersing power-off protection circuit. The utility model has the advantages of reasonable and simple structure, low cost and good anti-water protecting effect.

Description

The anti-water logging data memory module of automobile black box

One, technical field:

The utility model relates to a kind of automobile-used black box, the anti-water logging data memory module of particularly a kind of automobile black box.

Two, background technology:

At present, automobile black box claims automobile travel recorder again, and essential record, store car running data, data memory module are again the very important data record memory cell of automobile black box.It can be to driving information, automobile integrated information, storage keeps a record, it is to breaks in traffic rules and regulations such as containment fatigue driving, overspeed of vehicle, and bad steering behavior, support vehicles driving safety and the road traffic accident Analysis and Identification of constraint human pilot have important function.Fast development along with Chinese national economy; the traffic safety accident is in rising trend; the weight of vehicle, especially big traffic accident take place frequently; bring massive losses to the country and people; automobile is by serious impact, extruding in particularly meeting with a street accident; perhaps meet with high-temp combustion; perhaps plough under in the rivers; if the data in the automobile black box are damaged; brought the difficulty that is difficult to overcome for traffic administration person, operation management person's accident analysis and field data recovery; therefore, it is extremely important the data memory module to be carried out protection.Simultaneously; we can not be as aircraft black box, marine black box; the reproduction of taking expensive material and complicated technology structural measure to solve data; thereby should develop a kind of safeguard structure anti-water logging data memory module simple, with low cost; fall in the rivers data protection function of data memory module in the automobile black box so that solve automobile, realize that automobile black box applies.

Three, summary of the invention:

The purpose of this utility model provides the anti-water logging data memory module of a kind of simple in structure, cheap automobile black box.

Concrete scheme of the present utility model is: the anti-water logging data memory module of a kind of automobile black box, comprise memory, circuit board, it is characterized in that: memory and circuit board are with the insulation heat resistant casing outward, embedding has the heat-resisting anti-water logging filler of insulation between shell and memory and circuit board, circuit board is connected with socket, and socket one end stretches out outside the shell.

The circuit board of described data memory module is provided with anti-water logging power-off protecting circuit.

The utility model is at memory; circuit board is outside equipped with the insulation heat resistant casing; at memory; embedding has the organic silicon rubber of the heat-resisting protection against the tide of insulation between circuit board and the insulation heat resistant casing; and the 50 core needle sockets that are connected with data memory module are also handled through moistureproof conducting resinl coated; data memory module after the embedding has anti-water logging function like this; in addition; the circuit board of data memory module is provided with anti-water logging power-off protecting circuit; purpose is in order to prevent that module from meeting the water short circuit and causing that device burns out in the module; reach the usefulness of protection; thereby the module after the outage; can stand in 20 meters scopes of the depth of water; after the water logging 24 hours; take off from connector, at the accident treatment center or transportation management department can sense data the total data of memory module.

The utility model has the advantages that: rational in infrastructure, simple, cheap, anti-water logging protection is effective.

Four, description of drawings:

Fig. 1 is a front schematic view of the present utility model;

Fig. 2 is the sectional view of Fig. 1;

Fig. 3 is the circuit diagram of the anti-water logging power-off protecting circuit on the circuit board 5 of data memory module in the utility model.

Five, embodiment:

From Fig. 1, Fig. 2 as can be known: the utility model mainly is made up of memory 1, circuit board 5, insulation heat resistant casing 2, heat-resisting, the anti-water logging filler 3 of insulation, socket 4, it is characterized in that: memory 1 and the circuit board 5 outer insulation heat resistant casings 2 that are with, embedding has the heat-resisting anti-water logging filler 3 of insulation between shell 2 and memory 1 and circuit board 5, circuit board 5 is connected with socket 4, and socket 4 one ends stretch out outside the shell 2.Memory 1 is a non-volatile RAM.

As can be seen from Figure 3: the data memory module circuit board is provided with anti-water logging power-off protecting circuit, this anti-water logging power-off protecting circuit is by the first divider resistance R1, the second divider resistance R2, the 3rd divider resistance R3, current-limiting resistance R4, comparator IC1, little electromagnetic relay J, fast acting fuse F and water sensor constitute, measurement point a wherein, b forms water sensor, the second divider resistance R2 and the 3rd divider resistance R3 tie point are connected the input P2 of comparator IC1 by current-limiting resistance R4, the output P3 of comparator IC1 is connected with the contact of little electromagnetic relay J, another contact ground connection of little electromagnetic relay J, fast acting fuse F is made up of two coils, one contact of one of them coil is connected with the output P3 of comparator IC1, its another contact ground connection, another coil connects the 5V positive source; Be connected with measurement point a between the first divider resistance R1 and the second divider resistance R2, be connected with measurement point b between the second sub-resistance R2 and the 3rd dividing potential drop R3, measurement point a and measurement point b are installed in shell 2 outsides.The measurement point a of this moment and measurement point b play the effect of immersion transducer.

When operate as normal, resistance (R1+R2) and resistance R 3 dividing potential drops, get voltage and receive the input P2 of integrated comparator IC1 through R4, integrated comparator IC1 adopts M51201, inside has the reference voltage of voltage ratio than usefulness, the voltage of input P2 is designed to lower than reference voltage, this moment integrated comparator IC1 output P3 no-output, direct current+5V voltage is normally by little electromagnetic relay J, fast acting fuse F operating circuit power supply rearwards; When measurement point a on being contained in shell 2 and measurement point b run into water; because the conductivity of water; make measurement point a and measurement point b short circuit; its resistance is very little; the voltage of putting between divider resistance R3 and the R2 is raise rapidly; the reference data voltage that is higher than integrated comparator IC1; this moment integrated comparator IC1 output P3 output current; start little electromagnetic relay J adhesive; disconnected normally closed electric shock; make fast acting fuse F fusing simultaneously; input P2 at integrated comparator IC1 has disconnected power supply circuits, has protected the back circuit, and this protective circuit makes module obtain power-off protection effectively; because the transducer at shell can just shift to an earlier date power-off protection early than the circuit contacts water in the shell.

Claims

1, the anti-water logging data memory module of a kind of automobile black box, comprise memory (1), circuit board (5), it is characterized in that: the outer insulation heat resistant casing (2) that is with of memory (1) and circuit board (5), embedding has insulation heat-resisting anti-water logging filler (3) between shell (2) and memory (1) and circuit board (5), circuit board (5) is connected with socket (4), and socket (4) one ends stretch out outside the shell (2).

2, the anti-water logging data memory module of automobile black box according to claim 1, it is characterized in that: the circuit board of data memory module (5) is provided with anti-water logging power-off protecting circuit, this anti-water logging power-off protecting circuit is by first divider resistance (R1), second divider resistance (R2), the 3rd divider resistance (R3), current-limiting resistance (R4), comparator (IC1), little electromagnetic relay (J), fast acting fuse (F) and water sensor constitute, measurement point (a wherein, b) form water sensor, second divider resistance (R2) and the tie point of the 3rd divider resistance (R3) are connected the input (P2) of comparator (IC1) by current-limiting resistance (R4), the output (P3) of comparator (IC1) is connected with a contact of little electromagnetic relay (J), another contact ground connection of little electromagnetic relay (J), fast acting fuse (F) is made up of two coils, one contact of one of them coil is connected with the output (P3) of comparator (IC1), its another contact ground connection, another coil connects the 5V positive source; Be connected with measurement point (a) between first divider resistance (R1) and second divider resistance (R2), be connected with measurement point (b) between second sub-resistance (R2) and the 3rd dividing potential drop (R3), measurement point (a) and measurement point (b) are installed in shell (2) outside.