Shock sensor for standard alarm. Shock sensor: types, purpose, installation
And which gives the owner sound signals about what is happening. It is usually associated with common system alarm, and its configuration 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 relative to the axis of the car.
The underbody of the car is not suitable for placement sensor, because it can work if there is a body collision due to heavy vehicles passing nearby.
Plastic parts of the vehicle body are unsuitable for installation, because sensitivity decreases sensor.
The best place is a shield located between the car interior and the engine compartment.
- Shock sensor has four wires connected to the four-pin connector on the main alarm unit. The factory-equipped sensor is glued to a metal part of the body with double-sided tape. However, car owners who respect themselves prefer to use a special one so that install a shock sensor.
- It is manually adjusted during installation using resistors located on the sensor panel. One of the resistors prevents physical action (not swipe), the second - an alarm signal is given in the event of a strong impact on the car body.
- You need to unscrew both regulators all the way sensor(to zero). Start to slowly increase (several circles of rotation) the sensitivity in the warning zone.
- Once you have completed setting the sensitivity in the warning zone, use the same diagram to set the sensitivity of the alarm zone. To adjust it, you need to use 1 or 2 turns more than the warning zone.
After adding, close the alarm. Next, having set it to security, check the sensitivity of the car by tapping your hand on the body. There is no need to knock on the hood, roof, or doors, as dents may appear there. It is better to knock on the racks from the rear and. If sensitivity is insufficient, twist the resistors a few more turns.
- Shock sensors By design there are electromagnetic, piezoceramic, and also microphone.
- According to the method of response, sensors can be two-level or single-level. Two-level or two-zone sensors differ in strengths and weaknesses blows by car and in different ways react to external influences (alarm and warning).
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 are also additional options for 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 under load air pressure. 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 an 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 with technical point, and with
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 different parts in order to
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.
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:
- 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 power too quickly.
- Find the installation location sensitive element alarms. In most cases it is located under the front panel, but it is possible different options. Read the instructions for the vehicle. Look for the term VALET on it - this is the standard designation for a shock sensor.
- Before you start adjusting the parameters, disable the security mode. Switch the system to programming mode. Exact method The shock sensor settings depend on the features of the installed car alarm. In older models, a screw is used for this; in new models, buttons are used.
- 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.
- 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, method of installing security components) and the situation 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 up an alarm in semi-automatic mode. In this case, the sensor is switched to the “learning” mode, after which it is necessary to strike the body different strengths. 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 consider the regulation process using the example of a widespread car Alarm Starline A61.
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. IN official instructions it says it should be placed at the base of the steering column. 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 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. Car alarm Starline A61 works on the piezoelectric effect. When hitting the car body, it forms sound wave, which spreads through the internal components and reaches the Starline shock 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 down 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 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.
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 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 body or wheel of the car; in response, the alarm sounds 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.
Almost every security system Cars and modern car alarm brands are now 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 on 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.
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 claim that the shock sensor should be installed using metal parts bodies 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.
Some car service workers prefer to mount the shock sensor in the center of the cabin. vehicle, considering this place 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 consistently produce signals without false reactions when the sound is loud, strong wind and other external influences.