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Almost every security system cars and modern brands of car alarms are equipped today with a safety sensor or, as it is commonly called, a shock sensor. It is necessary to timely notify the owner of any external influences on his vehicle. Today we will discuss where to put the shock sensor.
Explore modern car alarms http://radar-detector-expert.ru/autosignalizacii of famous brands that have proven themselves excellently among motorists. Nowadays, almost every car is equipped with a car alarm and there is wide choose by the range of prices and functions of these devices.
These devices differ only in their physical principle, but they have one algorithm of operation: when extraneous movements are detected to the address of the machine, they send a signal to the system.
At the moment, there are two main opinions about the location of the shock sensor in the car. Where to install the shock sensor - supporters of the first argue that the shock sensor must be installed using metal body parts that are rigidly and firmly attached to the surface of the machine itself.
Their opponents are sure that this option is unacceptable, since iron dampens the amplitude of the oscillations and thereby degrades the quality of the device's operation, the shock sensor weakens the reaction to extraneous influences.
Even by adding sensitivity in the settings to the device, this problem cannot be solved, because in this case, at the slightest sound, it will work and disturb the owner for nothing. Where to install the shock sensor - as an alternative, it is proposed to install a shock sensor on the wiring harnesses, where plastic clamps will serve as fasteners.
Some car service workers prefer to mount the shock sensor in the center of the vehicle interior, considering this location to be the most suitable. This action makes sense, since when in the middle of the car, the shock sensor provides optimal sensitivity to extraneous influences on all parts of the body. The most important thing here is the firm installation of the appliance.
Recently, the shock sensor began to be attached to 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 to install the shock sensor? We can conclude that it is necessary to install the shock sensor where it will consistently give signals without false reactions with a loud sound, strong wind and other external influences.
Correct shock sensor setting alarm plays an important role in the operation of the car. If the shock sensor is configured incorrectly, the car will either react to false alarms or not react to real ones. To configure the shock sensor, you can contact the service center, or you can perform this operation yourself.
Shock sensor setting most often required if the alarm 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 blows on it.
To adjust the sensitivity of the alarm, you need to find the location of the shock sensor. Most often it is installed under the dashboard. If you do not know where it is, it is better to check with the alarm installer.
Modern alarms are most often equipped with a two-level shock sensor. The first level is triggered by a small impact on the body or wheel of the car, in response, the alarm gives a short beep and sends a warning to the alarm key fob. The second level is triggered by a strong impact on the car, while a continuous sound signal is turned on.
There are adjusting screws on the shock sensor to adjust the sensitivity of each level.
To find out what level a screw corresponds to, opposite them there are lamps that are actuation indicators. If you easily knock on the sensor, then only the first level signal will turn on (green light in our case). If you knock harder, then the second light will turn on, corresponding to the second level.
The direction of rotation of the screws is marked with + and - signs. Turning clockwise increases sensitivity, counterclockwise decreases sensitivity.
To work, you need a flat screwdriver of the appropriate width.
We start the setup from the first level of the shock sensor. By turning the screw counterclockwise, set the sensitivity to minimum.
After that, we slightly increase the sensitivity, close the car and put it in the 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 a blow in the middle of the body, in the area of the B-pillar.
A small shock should trigger the first level of the shock sensor and the alarm should emit a short warning signal. If too much impact is needed to trigger, reopen the vehicle and re-add sensitivity with the adjusting screw.
Thus, we configure the first level as we need it. Then we move on to setting the second level. Here everything is done in the same way, but it should work with a stronger blow.
Having adjusted the sensitivity of both levels, we check the reliability of the shock sensor attachment to the car. Insecure fastening can cause false alarms. If everything is fine, then we enjoy the work done.
A shock sensor is in ordinary words a shock sensor, in 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 at the smallest impact. The sensor must have a balanced "nervous system", it must have sufficient sensitivity to shocks and touches to the car, but at the same time it must not yell because of any rustle, for example, thunder or a car passing nearby.
So that the sensor is able to distinguish between true impact and impacts,
from false and accidental interference, now they are made "smart" who have
two-zone control. If a blow, even a light one, took place, then
the alarm should make a short audible warning. So Makar,
a villain or an accidental culprit learns that the car is guarded and
it is impossible to continue the impact.
If there is a strong shock, in the event of an accident, do not
authorized towing, burglary or glass breaking, an alarming
alarm and works according to the established scheme, with a certain interval
time. It is specifically to distinguish such blows that the system was developed
two-zone recognition.
In order for the sensor to be able to correctly recognize impacts and
impact, it has such a detail as a sensitivity element that
accepting the impact, processes its strength and converts it into a signal with
a certain sound. The sensing elements themselves are different types, v
depending on which recognition mechanism they have, there are three types of them:
- microphone;
- electrical;
- piezoceramic.
In addition, there is still additional options sensitive
parts that, due to the difficulty of construction and highest price were not
are 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, a controller works here.
the magnet, which is mounted on an iron spring, starts on impact
hesitation. Due to oscillations, an electrical signal appears in the multi-turn coil,
the systematization of the impact depends on how strong the signal was received. Such
sensors are very much in demand and are very often installed in car alarms,
since they are clear enough and at the same time ordinary and reliable.
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 very huge
dimensions of the final product.
Microphone sensors
In this case, a sensitive electret microphone
a special rubber cap is put on, there is a brass sinker on the cap.
The microphone is very sensitive and detects air pressure under the load. When
the load fluctuates, there is frozen, how strong the impact was on
body. The advantage is that such a sensing element is not exposed to
multiple acoustic interference.
Digital and
analog processing
These are the novelties of achievements that began to enter the world
auto alarms are comparable not so long ago. Here for processing
the signals received from the sensitive microprocessor are 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
received signal and determine whether it is necessary to raise the alarm or not, i.e.
he uses a logical computer processing scheme.
Shock sensors:
installation and efficiency
About shock sensors and their placement on the body
car, the views of professionals are not just shared, but contradict each other
friend. The problem is that some insist that the sensors should
installed only on very strong body parts, only on
iron, they must be fixed to the body and not succumb to any outsiders
fluctuations. The second half of the professionals say the reverse, they say that a large
part of the amplitude is taken specifically by iron, so the sensor cannot give
correct data. That's why the sensors are very often incorrect and weak
react to strong influences. And you cannot increase the sensitivity level,
since false positives will become more frequent. To solve this obstacle
experts of the 2nd group propose to strengthen the sensors on various outsiders
fasteners that will be strong, but with all this will be able to correctly reflect the data,
for example, clamps, harnesses, plastic ties, etc.
There are even such options for miscalculations that the average
the place of installation of sensors directly 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 identically sensitive to
influences on any element of the body. In this case, the most important thing is true and
fix the sensor firmly to prevent accidental operation.
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, well, with
from a security point of view, such a solution is not entirely. 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, it is necessary to keep in mind that the board should be where it is normal
will give sensitivity signals. For the base for choosing a place for
the sensor installation must take into account several fundamental criteria. First,
the sensor should be very measured and clear for any outdoor
impact, secondly, there should be no false positives as from lightning or
passing cars.
Correct setting
sensors
Through the method of lengthy checks and collection of information,
two valid and effective kinds of correct sensitivity option when
the sensors work very well and without any glitches:
- auto;
- personal tests.
In the first case, everything happens by the driver's hand, either
specialist, i.e. The alarm is set to neutral teaching
mode, after that, shocks or blows are created in various parts of the body. In these
moments the processor memory remembers everything, frequency and intensity, ultimately
in the database of collected data, there is a clear distinction between hard and minor impacts.
But everything is not so sweet here, the fact is that the beat is processed and recorded, but in different
parts of the body, such a blow will be processed by the sensors in different ways, and the signal
will also be different and there will be many wrong signals or defaults. Here,
for example, when hitting a wheel in training mode, the sensor received it as weak
blow, and the same blow to the body, he can take as strong and work
signal. With the same success, the alarm can incorrectly accept a weak
signal, but it will actually be a hack.
As for the second method, it is a personal approach with
multiple and painful trial and error. To do this, the alarm again
set to training mode, but tapping is not limited to one
blow to one part of the body. On the contrary, the blows are applied to different parts so that
the processor processed and memorized as many options as possible and then could
choose the right action. In this case, the choice of sensitivity is not made on
the base of sensors, and specifically for the alarm. The work is complicated by the fact that it is necessary
work shocks and signals for both alarm zones, for warning and
separate for anxious. This is naturally the clearest way, but asks for more.
labor and time.
An incorrectly adjusted car alarm causes inconvenience to the car owner. The result of errors in setting up the shock sensor of the alarm 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 much 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 a thunderstorm, passing cars and other obstacles);
- if it 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 work incorrectly. There are several most likely reasons:
- components are loose;
- the car alarm parameters are incorrectly adjusted.
Check if the sensors and the alarm electronic control unit are securely installed. You may be able to solve the problem simply by putting them back in place.
Adjusting the sensitivity of the shock sensor
The general procedure for adjusting the sensitivity of the shock sensor is shown below:
- Disconnect the battery. Attention! The documentation for some car alarms prohibits doing this. In this case, remove the light fuse to prevent the battery from losing power too quickly.
- Locate the installation location for the alarm sensing element. In most cases, it is located under the front panel, but it is possible different variants... Read the instructions for the vehicle. Look for the term VALET on it - this is the standard designation for a shock sensor.
- Disarm the security mode before starting to adjust the parameters. Switch the system to programming mode. The exact method of setting the shock sensor depends on the features of the installed car alarm. In old models, a screw is used for this, in new ones - buttons.
- Pay attention to the alarm sensitivity scale. It indicates 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, this is usually set to 5.
- It is not recommended to increase the sensitivity of the shock sensor too much. Most alarm models are designed for about 10 operations per 1 cycle, after which the car will have to re-arm the car alarm.
The choice of specific parameters for car alarms depends on the characteristics of the car (its weight, installation method of security components) and the situation in the parking place. When choosing a suitable indicator, it is recommended to constantly check the stability of the sensor response. Pick a certain number and hit the body lightly. If there is no reaction, hit a little harder. Determine how hard the security alert sounds.
For maximum accuracy, arm the car and wait for about three minutes, then check the sensitivity of the alarm. Wait a couple more minutes after each check. In many protective systems, car alarms are put into increased sensitivity mode if the case has just been subjected to mechanical stress.
Sometimes it is possible to configure the alarm in a semi-automatic mode. In this case, the sensor is switched to the "learning" mode, after which it is necessary to strike the body with blows of different strengths. However, remember that car alarms perceive mechanical stress on different parts of the car differently. For example, the impact on the wheel is less "felt" than the impact on the hood.
Starline Alarm Shock Sensor Setup
Let's consider the regulation process using the example of the widely used Starline A61 car alarm.
The process is simple enough. The only tool you need is a thin Phillips screwdriver. The main difficulty is finding the installed Starline device. The official instructions say that it should be placed at the base of the steering column. V service centers usually follow this instruction by placing the alarm component in the column next to the pedals.
The Starline shock sensor is equipped with fine 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 to the right, it increases.
In the process, it is recommended to periodically check the work efficiency. Car alarm Starline A61 works on the piezoelectric effect. Upon impact on the car body, a sound wave is generated, which propagates through the internal components and reaches the Starline impact sensor. Optimum performance is only guaranteed if the sensitive alarm component is firmly attached to the metal.
To adjust the sensitivity of the car alarm, turn off both zones 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 sensitivity of the device is too strong, lower the parameter. If the alarm does not work, increase it. In a similar way, the Starline car alarm full alarm zone is configured.
The main difficulties when setting up
If after adjustment the Starline shock sensor continues to work incorrectly, try resetting the parameters. Information on how to do this is indicated in the instructions. If there is no information, it is better to go to a car service - they know how to work with any type of alarm.
The regulation process for Starline car alarms is relatively simple. The main thing is to check the result correctly and set the desired sensitivity level. Remember that in the absence of 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 the service station.
Shock sensor installation report on Vesta:
I bought a two-core wire 5 meters, corrugations, an Аlligator ps302 shock sensor and a 5-pin relay. The sensor has four inputs red "+", black "-", green "warning zone" (this is when the signal 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 to the high-speed rail unit.
After removing the glove compartment, immediately behind it is the BCM unit, which is attached to one nut for 8. It connected, red 12 volts constant, inserted a 5A fuse and connected the signal to the shock sensor from the driver's door switch on the black connector to the orange wire.
If you need to be more precise about how to connect, then there is a video on the Internet of how to install an alarm on the Lada Vesta, that's where I got my knowledge)
Then I disassembled the panel and connected the plus from the cigarette lighter, we have it red.
Then he wrapped the corrugation with modelin and threw it on the ties to the location of the shock sensor.
I placed the sensor behind the glove compartment, it turns out to the left of the upper corner. But first I connected everything according to the scheme and then gathered it in a heap, pasted it over with modelin so that the corrugation did not creak, etc.
Yesterday, during the day, I went to set the sensitivity on the sensor, on a 100-point scale, set it to about 85. The pain will not be enough for the back of the car, but if you do not have a big blow with your hand, the signaling works with a bang) Attach the shock sensor quite rigidly, and then if it is, so to speak, in limbo, it can work just like that, for no reason, from the slightest hesitation.