Connecting a shock sensor to an alarm system. Shock sensor: types, purpose, installation

A shock sensor is, in ordinary words, a shock sensor, in 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 at the slightest 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 yell because of any rustle, for example, thunder or a car passing nearby.

So that the sensor can distinguish between true impact and impacts,
from incorrect and random interference, now they are made “smart”, which have
dual zone control. If a blow, even a light one, took place, then
The alarm should give a brief audible warning. In this way,
the villain or the random culprit will learn that the car is guarded and
the influence cannot be continued.

If strong impacts occur, in the event of an accident, do not
authorized towing, burglary or breaking of glass, an alarm will sound
alarm and works established scheme, at a certain interval
time. It is specifically to distinguish between such strikes that the system was developed
dual-zone recognition.

In order for the sensor to be able to correctly recognize impacts and
influence, it contains such a detail as an element of sensitivity, which
having received the impact, processes its strength and converts it into a signal with
a certain sound. The sensitive elements themselves are various types, V
Depending on what recognition mechanism they have, there are three types:

  • microphone;
  • electrical;
  • piezoceramic.

In addition, there is also additional options sensitive
parts that, due to the complexity of the design and the high price, were not
needed. For example, an LED in an elastic suspension that 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, a supervisor works here
a magnet, which is mounted on an iron spring, begins to
hesitation. Due to oscillations, an electrical signal appears in a multi-turn coil,
The systematization of the blow depends on how strong the signal was received. Such
sensors are very popular and are often installed in car alarms,
because they are quite clear 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 piezoplate, 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 that it is very huge
dimensions of the final product.

Microphone sensors

IN in this case on a sensitive electret microphone
a special rubber cap is put on; the cap has a brass sinker.
The microphone is very sensitive and detects air pressure under the load. When
the load fluctuates, it freezes how strong the impact was on
body. The advantage is that such a sensitive element is not subject to
multiple acoustic interference.

Sensors digital and
analog processing

These are the latest achievements that have begun to enter the world
car alarms are comparable not so long ago. Here for processing
Incoming signals from a sensitive microprocessor are used by the processor.
Using this technology, you can finely tune any area of ​​the body to suit
a certain sensitivity, and this adjustment is made using
keychain Naturally, a modern microprocessor can more accurately process
received signal and determine whether it is necessary to raise an alarm or not, i.e.
he uses logical computer circuit processing.

Shock sensors:
installation and efficiency

Regarding shock sensors and their placement on the body
car, the ideas of professionals are not only divided, but even contradict each other
to a friend. The problem is that some insist that sensors should
be installed only on very strong body parts, only on
iron, they must be secured to the body and not succumb to any outside influences
fluctuations. The second half of professionals talk about the opposite, they say that the big
part of the amplitude is taken directly by the iron, so the sensor cannot produce
correct data. Apparently this is why sensors are very often incorrect and weak
react to strong influences. But you can’t increase the sensitivity level,
because false positives will become more frequent. To solve this problem
specialists of the 2nd group propose strengthening sensors for various foreign
fastenings that will be strong, but at the same time will be able to accurately reflect the data,
for example, clamps, harnesses, plastic ties, etc.

There are even such miscalculations that the most average
the location where the sensors are installed is right inside the car, and specifically in the middle,
This is justified by the fact that in the middle of the cabin the sensor is equally sensitive to
influences on any element of the body. In this case, the most important thing is true and
securely secure the sensor to prevent accidental activation.

There is also innovation with the installation of a sensitivity sensor
- directly to the signaling board. If you look at it from an economic point of view,
then this is an ideal solution, because... inexpensive. But from a technical point of view, well,
From a security point of view, this solution is not entirely correct. It's getting very difficult
find a place to install the board that is safe and difficult for thieves to reach. Not counting
In addition, you need to keep in mind that the board should be placed where it is normal
will produce sensitivity signals. For the basis for choosing a place for
When installing a sensor, several fundamental criteria must be taken into account. Firstly,
the sensor must be very measured and clear to any external
impact, secondly, there should be no false positives such as from lightning or
cars passing by.

Correct setting
sensors

Through lengthy checks and information collection, we developed
two valid and effective types of correct sensitivity option when
The sensors work very well and without failures:

  • auto;
  • personal tests.

In the first case, everything happens at the hands of the driver or
specialist, i.e. The alarm is set to neutral training
mode, after which shocks or impacts are created in various parts of the body. In these
moments the processor memory remembers everything, frequency and intensity, ultimately
in the database collected there is a precise division into high and low impact 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 differently by the sensors, and the signal
The messages will also be different and there will be many incorrect signals or omissions. Here,
for example, when hitting a wheel in training mode, the sensor accepted it as weak
blow, and the same blow to the body it can take as strong and work
signal. With the same success, the alarm may incorrectly receive a weak
signal, but in reality it will be a hack.

As for the second method, this is a personal approach with
multiple and painful trials and errors. For this purpose the alarm is again
is set to training mode, but tapping is not limited to one
hitting one part of the body. On the contrary, blows are delivered to various parts so that
the processor processed and remembered as much as possible more options and then I could
elect right action. In this case, the choice of sensitivity is not made based on
based on sensors, specifically alarm systems. The work is complicated by what is needed
work shocks and signals for both alarm zones, for warning and
separately for anxiety. This is naturally the clearest way, but requires more
labor and time.

Correct shock sensor setting Alarm systems play an important role when operating a car. If the crash sensor is not configured correctly, the vehicle will either respond to false alarms or not respond to real ones. To configure the shock sensor, you can contact a service center, or you can perform this operation yourself.

Setting up the shock sensor Most often it is required if the alarm system is too sensitive: it reacts to passing cars, thunderstorms, etc. And sometimes it happens the other way around - the car does not react even to strong impacts on it.

To adjust the alarm sensitivity, you need to find the location of the shock sensor. Most often it is installed under the instrument panel. If you don't know where it is, it's best to check with your alarm installer.

Modern alarm systems are most often equipped with a two-level shock sensor. The first level is triggered when there is a slight impact on the car body or wheel; in response, the alarm emits a short beep and sends a warning to the alarm key fob. The second level is triggered when there is a strong impact on the car, and a continuous sound signal is activated.

To adjust the sensitivity of each level, the shock sensor has adjusting screws.


To find out which screw corresponds to which level, there are lights opposite them, which are operation indicators. If you lightly tap the sensor, only the first level signal will turn on (the green light in our case). If you knock harder, the second light, corresponding to the second level, turns on.

The direction of rotation of the screws is marked with + and - signs. When turned clockwise, the sensitivity increases, counterclockwise - decreases.

To work, you need a flat-head screwdriver of the appropriate width.

We start setting up from the first level of the shock sensor. By turning the screw counterclockwise, we set the sensitivity to minimum.

After this, we increase the sensitivity a little, lock the car and put it in security mode.

We wait until the alarm goes into security mode (on some cars this happens with a delay of 30-40 seconds), and then we try to lightly hit the body. It is better to strike in the middle part of the body, in the area of ​​the central pillar.


A small impact should trigger the first level of the shock sensor and the alarm should emit a short warning signal. If the shock is too strong to trigger, reopen the car and again add sensitivity using the adjusting screw.

Thus, we configure the first level as we need. Then we move on to setting the second level. Here everything is done in the same way, but it should trigger with a stronger blow.

Having adjusted the sensitivity of both levels, we check the reliability of fastening the shock sensor to the car. Insecure mounting may cause false alarms. If everything is fine, then we enjoy the work done.

In order for your car alarm to fulfill its mission without failures or false alarms, it must be configured correctly. In particular, adjust the shock sensor. This is quite easy to do, so you can do this adjustment of the alarm sensitivity yourself.

First you need to find the location of the sensor. In most cases, this device is hidden hidden in the car 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 it is installed according to this manual). Carefully inspect the found sensor - it should have a special adjustment screw, with the help of which the desired sensitivity level is set. There are arrows on the sensor body in the area of ​​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 screwdriver of suitable size.


Now set the car alarm and after a minute test its sensitivity. Since security system should be triggered specifically by jolts, its operation should be checked by jolts or blows. To do this, push or hit the car (body or windshield) - first slightly, and then harder.


If the alarm sounds after a light touch to the car, you have overdone the system sensitivity level and it needs to be reduced. If the siren does not turn on even after several intense impacts, the shock sensor should be adjusted towards greater sensitivity.


After successfully setting up a car alarm shock sensor, such unpleasant surprises as false alarms due to temperature changes or noise effects should no longer bother you. But remember that too low sensitivity of the sensor can also play a role in reverse side– the alarm will not work not only in the presence of harmless outside interference, but also in the event of an attempt to break into the car. Therefore, if you are not sure that you will do everything correctly, entrust the installation of the system to specialists.

Almost every car security system and modern car alarm brands today are equipped with a security sensor or, as it is commonly called, a shock sensor. It is necessary to timely notify the owner of any external influences to his vehicle. Today we will discuss where to install the shock sensor.

Study modern car alarms http://radar-detector-expert.ru/autosignalizacii of famous brands that have proven themselves excellent among car enthusiasts. These days, almost every car is equipped with an auto alarm and there is a wide choice of prices and functions of these devices.

These devices differ only in their physical principle, but they have the same operating algorithm: when they detect extraneous movements toward the machine, they send a signal to the system.

On at the moment There are two main opinions regarding the location of the shock sensor in the car. Where to install the shock sensor - supporters of the first argue that the shock sensor should be installed using metal body parts that have a rigid and durable attachment to the surface of the car itself.

Their opponents are confident that this option is unacceptable, since iron dampens the amplitude of vibration and thereby worsens the quality of the device’s operation; the shock sensor’s response to external influences weakens.

Even adding sensitivity in the settings to the device cannot solve this problem, because in this case it will go off at the slightest sound and disturb the owner over trifles. Where to install the shock sensor - as an alternative, it is proposed to install the shock sensor on the wiring harnesses, where plastic clamps will serve as fasteners.

Workers at some car service centers prefer to mount the shock sensor in the center of the vehicle interior, considering this location to be the most suitable. This action is not without meaning, since when located in the middle of the car, the shock sensor provides optimal sensitivity to external influences on all parts of the body. The most important thing here is that the device is firmly installed.

Recently, the shock sensor began to be mounted on the alarm board. This solution is the most profitable in material terms, but its effectiveness is noticeably reduced. This happens because it is almost impossible to find a place for such a device that will be inaccessible to burglars.

Where should I put the shock sensor? We can conclude that the shock sensor needs to be installed where it will stably provide signals without false reactions during loud sounds, strong winds and other external influences.

An incorrectly adjusted car alarm causes inconvenience to the car owner. The result of errors when setting up the alarm shock sensor is too frequent activation of the alert or a complete lack of reaction to what is happening. Follow the instructions below and you will quickly, without special effort set the car alarm sensors to the desired mode.

Why do you need to change the sensitivity of the shock sensor?

The process is performed in the following cases:

  • if the alarm is too sensitive (triggered by thunderstorms, passing cars and other interference);
  • if she does not react in any way even to impacts on the car.

Before starting work, you need to determine what causes the car alarm to not work properly. There are several most likely reasons:

  • components are poorly secured;
  • The car alarm parameters are incorrectly adjusted.

Check that the sensors and electronic alarm control unit are securely installed. Perhaps the problem can be solved by simply returning them to their place.

Adjusting the sensitivity of the shock sensor

The general sequence of actions when setting the sensitivity of the shock sensor is given below:

  1. Disconnect the battery. Attention! The documentation for some car alarms prohibits this. In this case, remove the light fuse to prevent the battery from losing energy too quickly.
  2. Locate the installation location of the alarm sensor. In most cases it is located under the front panel, but it is possible different options. Read the instructions for vehicle. Look for the term VALET on it - this is standard designation shock sensor.
  3. Before you start adjusting the parameters, disable the security mode. Switch the system to programming mode. The exact method of setting the shock sensor depends on the features of the installed car alarm. In older models, a screw is used for this, in new ones, buttons are used.
  4. Pay attention to the alarm sensitivity scale. It indicates the available levels. Their number usually ranges from 0 to 10, where 0 is a complete lack of reaction to events, and 10 is the maximum possible sensitivity. In new cars the indicator is usually set to 5.
  5. It is not recommended to increase the sensitivity of the shock sensor too much. Most alarm models are designed for approximately 10 alarms per cycle, after which the car will have to be reset to security mode.

The choice of specific car alarm parameters depends on the characteristics of the car (its weight, installation method security components) and the conditions in the parking area. When choosing a suitable indicator, it is recommended to constantly check the stability of the sensor response. Select a specific number and lightly hit the body. If there is no reaction, hit a little harder. Determine the force at which the security alarm sounds.

To achieve maximum accuracy, put the car in security mode and wait about three minutes, then check the sensitivity of the alarm. After each check, wait a couple more minutes. In many protective systems The car alarm is switched to high sensitivity mode if the body has just been subjected to mechanical stress.

Sometimes it is possible to set the alarm in semi-automatic mode. In this case, the sensor is switched to the “learning” mode, after which it is necessary to apply blows of varying strength to the body. However, remember that car alarms perceive mechanical loads on different parts of the car differently. For example, a blow to a wheel is “felt” weaker than a blow to the hood.

Setting up the Starline alarm shock sensor

Let's look at the regulation process using the example of the widely used Starline A61 car alarm.

The process is quite simple. The only tool you will need is a thin Phillips screwdriver. The main difficulty is finding an installed Starline device. The official instructions say that it should be placed at the base of the steering column. IN service centers Typically they follow this instruction by placing the alarm component in the column next to the pedals.

The Starline shock sensor is equipped with subtle mechanisms for adjusting its parameters. A screwdriver is used to adjust the sensitivity. If you turn the mechanism to the left, the sensitivity of the car alarm decreases, if you turn it to the right, it increases.

During the process, it is recommended to periodically check the effectiveness of the work. The Starline A61 car alarm operates on the piezoelectric effect. When a car body is hit, a sound wave is generated, which propagates through the internal components and reaches the Starline impact sensor. Optimal performance is only guaranteed if the sensitive alarm component is securely fixed to metal.

To adjust the sensitivity of the car alarm, turn both zones down and add a warning zone (located next to the green LED). Set the car to security mode and wait about a minute. Now hit her body firmly. If the device sensitivity is too high, lower the setting. If the alarm doesn't work, increase it. In a similar way, you can configure the full alarm zone of the Starline car alarm.

The main difficulties when setting up

If, after adjustment, the Starline shock sensor continues to respond incorrectly, try resetting the parameters. Information on how to do this is provided in the instructions. If there is no information, it is better to go to a car service center - they know how to work with any type of alarm system.

The process of regulating the Starline car alarm is relatively simple. The main thing is to correctly check the result and set the desired level of sensitivity. Remember that if you have no experience in solving such issues or if you want to adjust the alarm as quickly and efficiently as possible, it is better to go to a service station.