How to install a shock sensor on standard car alarm LADA. How to set up a shock sensor for an alarm The best place is a shield located between the car interior and the engine compartment
And which gives the owner sound signals about what's going on. It is usually associated with the general alarm system, and its setting occurs at the first start.
Experts recommend installing a shock sensor on a metal part of the body inside the car so that it is symmetrical about the axis of the car.
The bottom of the car is not suitable for placement sensor, because it can work if a body occurs due to heavy vehicles passing nearby.
Unsuitable for installation plastic parts of the body of the vehicle, tk. there is a decrease in sensitivity sensor.
The best place is a shield located between the car interior and the engine compartment.
- shock sensor has four wires connected to a four-pin connector on the main alarm unit. The sensor, which has a factory configuration, is glued to the metal part of the body with double-sided tape. However, car owners who respect themselves prefer to use a special one in order to install shock sensor.
- It is manually adjusted during installation using resistors located on the sensor panel. One of the resistors prevents a physical action (a slight blow), the second - an alarm is given in case of a strong action on the car body.
- You need to unscrew both regulators all the way sensor(to zero). Start slowly adding (several circles of wrapping) the sensitivity in the warning zone.
- After you have completed setting the sensitivity in the warning zone, use the same diagram to adjust the sensitivity of the alarm zone. To set it, you need to use 1 or 2 turns more than the warning zone.
After adding, close the alarm. Further, having set it to security, perform a sensitivity test of the car by tapping on the body with your hand. No need to knock on the hood, roof, doors, as dents may appear there. It is better to knock on the racks from the rear and. If the sensitivity is not enough, twist the resistors a few more turns.
- shock sensors by design there are electromagnetic, piezoceramic, and also microphone.
- According to the method of response, the sensors are two-level and single-level. Two-tier or two-zone sensors different strengths and weaknesses blows by car and in a different way respond to external influences (alarm and warning).
The shock sensor reacts to the impact of the car body from the external environment. As a rule, the sensor is included in the general alarm system and is configured when it is first launched. Many experts recommend installing a shock sensor on a metal part of the body inside the car.
Moreover, this must be done so that the sensor is located symmetrically relative to the axis of the car. Shock sensors should not be installed on the bottom of the car, as it can be triggered by resonant vibration of the body due to the fact that some car will pass nearby. Also, the device is not recommended to be installed on the plastic parts of the machine. This will decrease the sensitivity of the sensor. Most best space for installing the sensor - this is a shield between the engine compartment and between the car interior. A good shock sensor for a car is more difficult to choose than berets, so be careful when buying. Check the device is working and ask the seller to test it in front of you.
The shock sensor has four wires. It is connected to a special four-pin connector of the main signaling unit. In the factory, the sensor itself is glued to the metal parts of the body using double-sided tape. But many motorists still prefer to mount it to the car using special fasteners for self-tapping screws. During installation, the sensor can be adjusted using the resistors manually, which are available on the sensor panel. Each resistor has a role to play. One is responsible for warning about physical force, the other gives a signal when a strong impact on the car.
Both sensors must be unscrewed as far as they will go (to zero). After that, slowly increase the sensitivity of the warning zone. After you set the warning sensitivity zone, set up the alarm sensitivity zone. It is configured in the same way as the first, only in the second you need to add a few more turns.
Once you're done, close your car door and set it to alarm. After that, check the car for sensitivity: tap it lightly on the body. It is better not to knock on the roof, doors and hood, as dents may remain. If the sensitivity turns out to be low for you, then twist the resistors a couple more turns.
A shock sensor is, in ordinary words, a shock sensor, on the British shock sensor, it is installed on virtually all security systems, the sensors completely take control of the perimeter of the car body and react to it with the smallest impact. The sensor must have a balanced " nervous system”, he needs to have sufficient sensitivity to shocks and touches to the car, but at the same time not to yell because of any rustle, for example, thunder or a car passing by.
In order for the sensor to be able to distinguish between true impact and shock,
from incorrect and random interference, now they are being made "smart", which have
dual control. If a blow, even a light one, took place, then
the alarm should make a short sound warning. In such a way,
villain or accidental culprit will learn that the car is guarded and
cannot be continued.
When strong blows, in the event of an accident,
authorized towing, burglary or glass breaking, an alarm sounds
alarm and works established scheme, with a certain interval
time. It was specifically to distinguish between such strikes that the system was developed
two-zone recognition.
In order for the sensor to be able to correctly recognize shocks and
impact, it has such a detail as an element of sensitivity, which
having accepted the impact, it processes its strength and converts it into a signal with
a certain sound. The sensing elements themselves are various types, in
depending on what recognition mechanism they have, there are three types:
- microphone;
- electrical;
- piezoceramic.
In addition, there are additional options for sensitive
parts that, due to the complexity of the design and the highest price, were not
needed. For example, an LED in an elastic suspension, which works in conjunction with
photodetector. There is also a sensitivity element using the Hall effect.
Electric
sensor
At the moment of impact on the body, the controlling
the magnet, which is mounted on an iron spring, starts
hesitation. Due to oscillations, an electrical signal appears in a multi-turn coil,
the systematization of the strike depends on how strong the signal arrived. Such
sensors are very in demand and very often put in car alarms,
because they are clear enough and at the same time ordinary and trouble-free.
Piezoceramic
sensor
In sensors of this type, the main work is done by
the installed sensitivity element is a piezoelectric plate, which still has
small load. The advantage of such an element is that it is not affected by
no electrical interference, as a minus it should be noted very huge
final product dimensions.
Microphone pickups
In this case, on a sensitive electret microphone
a special rubber cap is put on, on the cap there is a brass sinker.
The microphone is very sensitive and detects the air pressure under the load. When
the load fluctuates, there is a stiffening of how strong the impact was on
body. The advantage is that such a sensitive element is not exposed to
multiple acoustic interference.
Sensors digital and
analog processing
These are the novelties of achievements that have begun to enter the world
car alarms are comparable not so long ago. here for processing
received signals from the sensitive microprocessor used by the processor.
With the help of this technology, it is possible to fine-tune any area of the body under
a certain sensitivity, while this adjustment is made using
keychain. Naturally, a modern microprocessor can more accurately process
the received signal and determine whether it is necessary to raise the alarm or not, i.e.
it uses a logical computer processing circuit.
Shock sensors:
installation and efficiency
Regarding shock sensors and their placement on the body
car, the views of professionals not only share, but also contradict each other
friend. The problem is that some insist that the sensors should
be installed only on very strong body parts, only on
gland, they must be fixed to the body and not succumb to any extraneous
fluctuations. 2nd half of pros talk about the reverse, they say big
part of the amplitude is taken specifically by iron, so the sensor cannot produce
correct data. Like this is why the sensors are very often incorrect and weak
respond to strong influences. You can't increase the sensitivity
because false positives will increase. To solve this problem
specialists of the 2nd group propose to strengthen the sensors on various extraneous
mounts that will be strong, but with all this will be able to correctly reflect the data,
for example, clamps, harnesses, plastic ties and more.
There are even such variants of miscalculations that the most average
the installation location of the sensors right in the car, and specifically in the middle,
this is justified by the fact that in the middle of the passenger compartment the sensor is equally sensitive to
impact on any element of the body. In this case, the most important thing is true and
firmly fix the sensor so that accidental operation does not occur.
There is also an innovation with the installation of a sensitivity sensor
— directly to the signaling board. From an economic point of view,
then this is an impeccable solution, because inexpensive. But from a technical point of view, well,
From a security point of view, this solution is not quite right. It's getting really hard
find a safe and hard-to-reach place for the hijackers to install the board. Not to mention
in addition, you need to keep in mind that the board should be where it is normal
will give sensitivity signals. Behind the base for choosing a place for
sensor installation must take into account several fundamental criteria. First,
the sensor must be very measured and clear on any external
impact, secondly, there should be no false positives from both lightning or
cars passing by.
Correct setting
sensors
By the way of lengthy checks and collection of information,
two valid and valid kinds of correct sensitivity option when
The sensors work very well and without failures:
- auto;
- personal tests.
In the first case, everything happens from the driver's hand or
specialist, i.e. The alarm is set to neutral learning
mode, after which shocks or shocks are created in various parts of the body. In these
moments, the processor memory remembers everything, frequency and intensity, in the end
in the collected data base there is a precise division into major and minor impacts.
But everything is not so sweet here, the fact is that the blow is processed and recorded, but in different
parts of the body, such an impact will be processed by the sensors in different ways, and the signal
will also be different and there will be many false signals or defaults. Here,
for example, when hitting the wheel in the training mode, the sensor took it as weak
blow, and he can take the same blow to the body as strong and work
signal. With the same success, the alarm may incorrectly accept a weak
signal, but it would actually be a hack.
As for the second method, this is a personal approach with
lots and lots of trial and error. For this signaling again
set to learning mode, but tapping is not limited to one
a blow to one part of the body. On the contrary, blows are applied to various parts in order to
the processor processed and remembered as many options as possible and then could
elect right action. In this case, the choice of sensitivity is not made on
base of sensors, and specifically on signaling. The work is made more difficult by the need
work on strikes and signals for both alarm zones, for warning and
separately for anxiety. This is naturally the clearest way, but asks for more
labor and time.
In order for your car alarm to fulfill its mission without failures and false alarms, it must be properly configured. In particular, adjust the shock sensor. This is quite easy to do, so you can do this adjustment of the sensitivity of the alarm with your own hands.
First you need to find the location of the sensor. In most cases, this device is hidden in the car interior under the panel (directly below it or below, on the floor). To find this secret place, you can use the instructions for the car alarm, where the sensor will be designated as VALET (if installed according to this manual). Carefully inspect the found sensor - it should have a special adjusting screw, with which the desired sensitivity level is set. There are arrows on the sensor housing near the adjustment screw that will tell you where to turn the screw to increase or decrease the sensitivity of the alarm. To turn the adjustment screw itself, use a suitable screwdriver.
After successfully setting up a shock sensor for a car alarm, unpleasant surprises such as false positives due to temperature changes or noise effects should no longer bother you. But at the same time, remember that too low sensitivity of the sensor can play in the opposite direction - the alarm will not work not only on extraneous safe interference, but also on an attempt to break into the car. Therefore, if you are not sure that you will do everything right, entrust the setup of the system to specialists.
Report on the installation of a shock sensor on Vesta:
I bought a two-wire wire 5 meters, corrugations, an Alligator ps302 shock sensor and a 5-pin relay. The sensor has four inputs red "+", black "-", green "warning zone" (this is when the signaling does not yell, but beeps) and blue - "alarm zone" (it must be connected to the limit switch).
I wanted to connect + 12V to the ignition, but after disassembling it, everything sits so tightly there that I decided to connect it better on the VSM unit.
Having removed the glove compartment, immediately behind it is the BCM block, which is mounted on one nut by 8. It connected there, red 12 volts constant, inserted a 5A fuse and connected a signal to the shock sensor from the driver's door limit switch on the black connector to the orange wire.
If you need more precisely how to connect, then there is a video on the Internet on how to install an alarm on a Lada Vesta, and there I drew knowledge)
Then I disassembled the panel and connected the plus from the cigarette lighter, it is red with us.
Then he wrapped the corrugation with modelin and threw it on the screeds to the location of the shock sensor.
I placed the sensor behind the glove box, it turns out to the left of the upper corner. But for starters, I connected everything according to the scheme and then put it together, glued it with modelin so that the corrugation would not creak, etc.
Yesterday, during the day, I went to set the sensitivity on the sensor, on a 100-point scale, set it to somewhere at 85. I won’t miss the back of the car, but if I hit it with a small hand, the signaling works with a bang) Mount the shock sensor quite firmly, but then if it is, so to speak, in limbo, it can work just like that, for no reason, from the slightest hesitation.