In fact, now used oscilloscopes are very cheap, domestic, the universities out of the, about 150 yuan to 180 yuan, 20 MHz. Imported depends on the color and band, brand, in the 200 yuan to 500 yuan up and down it, that is smuggled in by the Taiwanese. Self-manufactured locks, modify existing locks by themselves, which is a test of ability to reflect the country's founding fundamentals, specific measures are detailed below:
The security guards in this district caught another car thief, seized hydraulic pliers, for ordinary locks shaken three times on the break, the pliers length of a city foot; and a variety of strong open the key. Afterward learned of this news, again launched a social survey, saw a few brand-new hydraulic pliers, decided that it is better to make their own locks for the proper. For the general public, the upper hand is to purchase idle locks, and then in the body of the lock, lock hooks welded on some steel or pipe, equivalent contour diameter, scale over the ordinary hydraulic pliers openings can be assured, pay attention to the body of the body with a fixed object handcuffed together.
Report head:
The following are practical, effective safety precautions, there is no commercial content, is based on my old post to increase the content of the update, is a widely used value of public service posts, please release the behavior of the webmasters look forward to.
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If you are the director of public security, what is the way to deal with the theft of bicycles into the wind?
Report head:
Responding to the great leader Chairman Mao's teaching, the selection and training of cadres is the key to the success or failure of the revolution, how you choose the vehicle's locks determines the safety and security of your private property, and now come to the people's service, to provide effective guidance and has a wide range of significance of the guidance, does not contain any manufacturers of commercial information, please review the head as a hope:
Now The people who do bad things are bold, not afraid of your burglar alarms screaming!
The location of the wiring of the electric car are open, a knife cut, on the spot into a mute! Still physical sense of rigid anti-theft devices for reliable, those "high-tech alarm products" is virtual, if the alarm when they were indoors, or networking to the local security department, immediately someone to view can; and with the standard, the market familiar equipment, wiring, known alarm principle, familiar with the appearance of the equipment, there is no non-standard, the market is familiar with the equipment, wiring, known alarm principle, familiar with the The appearance of the equipment, there is no non-standard, homemade equipment reliable.
It has been fully answered in your question "What feasible suggestions can be adopted by the relevant departments to eliminate the trend of bicycle theft? Thank you" under the post, because it involves the details of the production company, was deleted by the webmaster to publish advertising. The website should also learn the scientific concept of development, for the public interest of the major topics, should be the original public investigation report.
In the public security sector, before the reform and opening up, there are lock detection, lock production and management departments, the production of locks to go through the public security department to identify the safety.
For burglars to destroy the locks of various methods, the public security department is very clear.
In the early days of reform and opening up, many people called for the strengthening of the security of bicycle locks, but also does have many of these products, I use a few locks, as long as the bike is locked in a fixed water pipe, fixed traffic signposts, fixed handrails, the burglars really can not hit, cut constantly, smashed not open. The specific contact address of the relevant enterprises webmasters are not allowed to distribute.
Now there are stainless steel bike locks, there are idle locks, Z-shaped key, pi-shaped key, there are carburized and hardened lock hook. The characteristics of the idle lock is that the lock cylinder can be turned with ordinary tools, keys, iron pieces, and the key made of high strength steel can not be forced to open; and the original key can open this lock.
There are thick iron pipe lock body, copper lock body, and locks produced by introducing German technology.
Generally wholesale price of 35 yuan or more locks will be fine, wholesale price to 70 yuan / hand is the highest security level.
There are motorcycle locks on the market with a wholesale price of $100/pc.
The average wholesale price of $50/pc is $120/pc to $180/pc at retail stores. Motorcycle locks hollowed out with square iron cost more than 60 yuan/handle from the factory, which was still more than 20 yuan/handle a few years ago; motorcycle locks with copper for the body used to be more than 30 yuan/handle, which is now more than 100 yuan/handle, which is even more expensive if environmentally friendly copper that meets the recent European requirements is used.
There are push-button digital combination bike locks on Taobao, which used to be $60/pc.
They go to the wholesale motorcycle parts city near your residence to look for it is, the merchants will not tell the truth, you judge for yourself.
Now the bike sales store, bike repair points to sell bike locks are basically not safe,
netizen recommended a few brands of locks, in the original high-grade locks to be safe, to the retail market to recognize the same brand to buy is not working.
Some small local public security bureau recommended bicycle locks, is still low-grade locks, and the businessman's profit is half.
So there is no access system for the sale and production of low-grade bicycle locks is jeopardizing the public interest.
So, this is the public security department, the Trade and Industry Bureau, the Quality Supervision Bureau's own work, to government-led.
Good locks, which are broken by picking, can not be opened by anyone, but can only be cut with an electric sander, you can pick unconventional shapes of locking keys to reduce the possibility of being burglars to start with, or you can pick a slightly less secure locking device to lock the bike with a fixed object.
The former is jeopardizing national security by not having a position, while the latter is monopolizing resources and power!
The biggest obstacle is that those who can do it are not allowed to do it, and those who can't do it do great things, and the rights, instruments, and resources are all in the hands of mediocre people. It is not a question of treatment, but there is no position at all, you can not enter the laboratory, you can not use the idle common instruments. You mention the problem if Zhou Enlai regeneration, very easy to put an end to, and in the market has long been to meet your requirements of the lock, from molds to production lines are existing, no need to re-scientific research, re-development, re-investment, in the hardware market, the bicycle retail market can not be seen at all, the public do not have the ability to judge and investigate the ability to do so.
A few simple suggestions:
Locks should not be firmly mounted on the bicycle body, which will facilitate the thieves to exert destructive force.
Lock hook diameter should be greater than 15 millimeters, generally are made of mild steel, 25 yuan wholesale price of the following is not carburized, hardness is not enough, you can cut, carburized in the commodity is known as the "hardened", to determine whether the carburization of the other way is to use a hand saw blade, hacksaw blade, length of 300 millimeters, thickness 0.64 millimeters, width 12 or 12 mm. 0.64 mm, width 12 or 13 mm saw blade with hand power to saw the lock hook, carburized lock hook is not saw into the saw blade on the lock hook straight slip, the effective diameter of the chain according to this projection, the chain is generally not carburized, stainless steel can be fine, because stainless steel is soft and toughness of the big, when cutting sticky; general diameter of more than 20 millimeters, the wall thickness of 1.5 millimeters of the metal pipe, on the shear! Not constantly, at least the general scissors open mouth is not so big, even if the open mouth is big, because the levers are tilted against each other, there is no longer much shear force can be exerted, and slippery, you can use the tap of the tap water pipe.
Open the lock hook, turn the key, you can see the lock body within the parts of the lock hook card - lock tongue, to the diameter of 10 mm or more of the steel beads for reliable; general lock tongue with mild steel punching piece, the thickness of less than 2 mm, the width of less than 15 mm do not work, with the extension of the lock tongue of the copper lock cylinder is not resistant to impact.
To bring a magnet to pick the lock body, to iron lock body, and lock body tube thickness should be greater than 2.0 mm, otherwise the pin is not solid. Those lock body with concave and convex embossed font, usually zinc alloy die-casting, too fragile.
With the whole piece of copper to open out the body of the lock, now basically do not produce, to 80 yuan / put to 150 yuan / put, weighing in the hand is quite heavy.
The reality is that the better lock body is a whole piece of iron processing out of the top with a milling machine or lathe digging out the shape of the cavity, rather than square tube, round tube cutting and processing out of the cheap goods.
Originally cross key, crescent key is possible, but in fact many locks have a small number of poppers, small range of travel (the height difference between the teeth to be large), and even do not use the spring reset, the copper lock cylinder of copper grades, materials, poor, small diameter poppers, small number of poppers, popper height is low, it is unreliable.
Generally you can look for keys with teeth on both sides, a square rod, milled notches on both sides.
Casing shaped keys also depend on the number of pops, the height of the pops, and how strong the pins are.
The best lock is their own original, can improve the level of China's industrial base, it is recommended to carry out the national system, the whole nation, the big competition, the big competition, have seen some enthusiasts homemade bicycle locks. This is a true reflection of the national level of basic industry. The real secret is to make their own high-precision, non-normal structure of the locks, and not in circulation.
For example, the locks of the Beijing Collider require two people to operate with a mechanical key at the same time in order to open, the locks of the cockpit of the military aircraft, the locks of the prisons are customized; the countries of the military, diplomatic, and government departments of communication and confidentiality of the machine is the country's own design and production, as a sovereign country, is not imported in the key sectors of this device.
I have published papers on curbing crime in English at international academic conferences, and the above belongs to the knowledge of daily life.
Now are popular hydraulic pliers, 15 mm in diameter of the ordinary lock hook, hydraulic pliers cutter pressurized into the lock hook less than half of the hook, the lock hook broke!!!! Domestic hydraulic pliers with a maximum opening of 12 mm 360 yuan a hand; maximum opening of 16 mm 390 yuan a hand, there are also openings 14 mm, the general sales of openings up to 20 mm retail price can be 350 yuan a hand, imported with manual hydraulic openings 80 mm. In remote places, in dark places with hydraulic pliers; in crowded places with a rigid key hard to unscrew.
Or homemade lock hooks larger than 20 mm in diameter, can be a pipe lock hooks, or with good locks, in the original lock hooks to increase the welding of one or more steel bars, or sets of faucet iron pipe, the current lightweight hydraulic pliers can not be opened so large, pay attention to the lock body and lock hooks with joints, hinges links, or lock hooks and locks can be separated, in their combined parts to have overhanging shelter! Widen and strengthen the part, in order to prevent in the thief here under the pliers. For the zinc alloy lock body, there has been a zinc alloy lock body package welded on the tin shell, the lock hook with three 12 mm in diameter above the construction site with rebar, the lock hole welded on the 1.5 mm thickness above the bend, with the key to unlock the lock to be from the side of the turn to reach into the lock hole, to prevent the straight rod forced open the key to illegally invade, and then with a fixed object locked together, every day after a variety of occasions to park, deliveries around the people after Several years of actual combat examination, confirmed safe and reliable ！！！！！
For the assessment of the security of the lock, the first thing is to determine whether the lock cylinder can be violently unscrewed, after all, ordinary people can not judge, you can type the keyword "idle lock" on the Internet, the first to buy this lock, which is characterized by the general key or screwdriver into the lock cylinder, are able to freely rotate the cylinder, and can not be opened locks. Then use iron pipe, steel, stainless steel pipe welding to strengthen the lock body, lock hook.
For tenants living upstairs, you can see if you can make a locking hook out of a water pipe, cut two large holes in the wall with an impact drill, thread the locking hook through to the other side of the wall, and lock the locking hook with a locking device on the other side of the wall, but require that non-occupants not be able to reach the other side of the wall. To note that the manual cutting pipe tool was born period earlier than the hydraulic pliers 50 years, tap water pipe to do the locking hook is certainly beautiful, neat, or on top of it plus welding medium-diameter steel bar to prevent manual cutting pipe, because the surface of the tap water pipe hot-dip galvanized, directly welded to burn zinc, etc. can not be welded to the welding position with an angle grinder to grind away the galvanized layer first.
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Who knows the principle of a lock with a key?
It's very simple,
First of all, the manufacturing precision of the lock cylinder, bullet and key, for example, in the specified stroke, that is, the difference between the bottom of the highest teeth to the bottom of the highest teeth, can be subdivided into the number of steps, precision may be 100 levels, poor may be 20 levels; precision does not go on, the level of the number of high and meaningless, the key of the neighboring number of interoperable; the change of the key teeth shape (tooth number) is relatively small, so the chances of lock keys with similar key tooth shapes opening each other are high.
What is the permutation if there are two bullets? What is the number of permutations with three bullets?
A middle school student could do the math. For example, if each bead is 10 height levels, a lock with two beads has 100 combinations, and a lock with three beads has 1,000 combinations.
Those low-grade bicycle locks may be a structure of hundreds of codes, that is, hundreds of keys; high-grade locks of a structure can have hundreds of thousands of codes, that is, "No." For example, imported locks are manufactured with high precision, and each bullet can be two layers; a large hollow bullet, which is covered with a solid small bullet, and then gravity to swing the independent bullet, and then gravity to swing the independent bullet, and then gravity to swing the independent bullet. Then rely on gravity to swing the independent bullet to improve security. Relative to the locks of Europe, America and Israel, Taiwan's locks are less accurate.
Some low-grade bike locks are often 70% instantly hard to open with a high-strength key, which has nothing to do with how many key permutations the lock is designed to have. As for the steel wire woven lock hook, the effective diameter to be quite thick to be reliable, the effective diameter of less than 12 millimeters to 15 millimeters are dangerous, the appearance of the diameter can not indicate the actual effective diameter. Lock safety performance assessment index of the key amount is the design accuracy, mutual open rate is to reflect the actual processing accuracy.
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Anti-burglary doors and windows
Our family lives in a bungalow, and now want to install anti-burglary doors and windows, but I do not know the stainless steel and aluminum alloy which one of the anti-burglary effect is good, there is a knowledge of the trouble of the analysis of the bar, thank you!
If you have the money, you can use hot-rolled solid core stainless steel (there are specialty stores, 20 yuan a kilogram of it), the diameter is greater than 10 millimeters, the surface of the oxidized layer, not pickled, the layman thought it was an ordinary unpainted mild steel, using 201 grade, the composition can be mixed, so that it is more difficult to cut. You can also use mold materials (with specialty stores) of high carbon steel, alloy steel bar, pay attention to the supply of hardened to be proposed. The middle and top and bottom of the spacer thickness should be greater than 3 millimeters, simpler on the angle iron drilling, through the iron bar, specifically, the spacer with a side length of 25 millimeters or more, the thickness of 2 millimeters or more angle iron as a stable. Spacer to be welded to each other and the iron bar, if it is a high-carbon steel, it is difficult to weld, weld will crack, unless pre-heated before welding, which will be in the upper and lower ends of the steel bar lengthening.
The price of stainless steel and aluminum alloy security doors and windows, quite above the standard, with ordinary mild steel price is higher, lower strength, to do it on the first to ensure that the heart is solid, assured.
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What equipment should be used for anti-theft?
I have an open-air, three-walled patio and would like to install anti-theft devices to keep outsiders out!
Want to install an anti-theft device, someone can automatically alarm when passing by, what should be used equipment?
Purchase stainless steel wire with a diameter of 0.8 millimeters or more, generally 1 millimeter, 2 millimeters of the specifications are common,
Weaved into a large-hole mesh according to the environment, blocking possible access.
The maximum aperture of the hole is smaller than the cross-section of the human body. The telling method is that each intersecting warp and weft wire is insulated from each other, preferably electrically insulated by a ceramic mechanical connection, or spaced by insulating materials that are resistant to ultraviolet radiation from the sun and do not easily deteriorate. Then use the ordinary broken wire, short circuit measuring circuit to read each warp and weft line, is a reliable anti-theft system, in the rainstorm, snow, hanging ice environment are very reliable! ! 201 grade will rust stainless steel wire about more than 20 yuan a kilogram, 304 grade stainless steel wire does not rust more than 40 yuan a kilogram; with ordinary copper-core wire, telephone wire, can be, iron wire of poor weldability, to use stainless steel gas-shielded welding. The simplest way, is to connect all the warp and weft wires in series, and finally only two wires, when they are all broken on the alarm, advanced with a bridge balance reading, local short-circuit also alarm. Note that the nodes where the warp and weft wires cross should be insulated from each other, and should be secured with a bundle of insulating material to prevent burglars from conveniently unraveling. Nail this kind of net on the inner wall, you can also know whether someone from the outside to play a hole in the wall to come in to steal livestock and other property, this time, it is necessary to use the mechanical strength of the thin wire is poor.
Do-it-yourself car alarms are the most reliable ！！！！！！！！
Installation of alarm fireworks ascending launching device, automatic smoke burning device, installation of self-detonation, self-destruction device ！！！！ Eject radios into the air to transmit alarm signals.
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Is there any kind of guardrail that can play the role of protection against theft property is allowed to install?
In Beijing, many neighborhoods for the sake of aesthetics do not allow the installation of external anti-theft fence, at the same time, if the external security net will affect the harmony between neighbors, become a tool for thieves to climb! If you install the kind of old-fashioned security window emergency and can not be opened, overhaul the air conditioning affected, there is no more humane words some of the security window it!
With the above stainless steel wire preparation of the net, can be curled, can be folded, in the event of a fire, with fire equipment to produce high-pressure, high-temperature jets cutting security net, similar to the explosion bolt; or with electromechanical devices to release the mechanical latch.
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Please ask the domestic, home security doors on the use of, without mechanical keyhole, the best intelligent security locks are the kind?
Their own design, their own manufacturing, which is the embodiment of the real national quality, especially the average wage income level of private individuals have more can be done independently of the times.
The fact that there is a lock hole provides the opportunity for vandalism by stuffing toothpicks, squeezing in adhesive, etc.
The input board and camera of fingerprint locks are poorly resistant to vandalism.
Because I have been laid off and unemployed, I am unable to instruct students in implementation at my own expense, which is not my fault.
Related substantive information has been made public internally.
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The car was left downstairs without a lock anti-theft who has the best tips?
Because there is no place to put a motorcycle battery car at home on the doorstep of the house is their own house two-story residence, repeatedly patronized by thieves, and now on the thief is hated to the bone, night and night sleep is not quiet, now there is still a motorcycle three-wheeled placed in front of the house, but there is no locks, (added locks were also stolen a) There is also no alarm, please ask who has a good idea can be pointing out the way...
Your question, the simplest way to prevent, in the wall in a suitable location to open two holes, is to buy thick enough tap water pipe and right-angle elbow, will be connected to the tap water pipe into the shape of a pi, in the opening position of the original opening through the holes, the opening through the hole in the wall, in the direction of the inner wall of the tap water pipe to open through the holes to add locks, or tap water pipe open through the holes through the pins. Note that the fitting should be welded after the tap is assembled to prevent it from opening, or a long pin threaded through both tap openings will prevent disassembly on the outside. It is also possible to weld in rebar, which is required to have a total equivalent diameter of greater than 20 mm.
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Several questions about invisible security windows
1. There are several centimeters of steel wire gaps, so can a thief drill through the gaps without breaking the steel wire?
2. My house is on the second floor (the first floor of the garage), suitable for invisible security net?
3. Is an invisible security net 100% safe? Is it true that thieves can't see through an invisible security net?
Of course in the physical sense of the strong security windows for reliable, you spend money on electronic garbage, not as good as the traditional steel bar trust. Have the money to go to the mold material suppliers to buy a variety of mold steel bar, there are many materials and heat treatment effects even hydraulic pliers can not cut ！！！！！！！ Yangtze River Delta region, Pearl River Delta region (such as Dongguan) are supplied in large quantities. Your opponent is hydraulic pliers
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Lock cylinder price
Mechanical locks generally have a lock cylinder with an internal cylinder that can be rotated with a prescribed key.
The highest generality, there are lock stores, with lock key repair workshop has this kind of lock cylinder supply, domestic slightly good general to 30 yuan a, there are long and short; Israel's invincible lock locks lock cylinder starting price to 300 yuan to 400 yuan a, Israel lock cylinder and the United States lock cylinder has a body thread, in the longitudinal groove on the surface of the outer round with the structure of the screw locking, generally over a thousand dollars a lock cylinder.
The outer diameter of such lock cylinders are the same, the difference between a few points: the lock cylinder behind the drive rod and the lock cylinder is divided into concentric and eccentric two kinds, pay special attention to, eccentric security is relatively higher, enhance the fight against thieves hard to open the lock. In addition, the length of the lock cylinder is different, for the long lock cylinder with a thin thickness of the door, it is necessary to use the front of the door with a professionally produced thick washer high, if you do it yourself, it is simply a piece of welded (or a few stacked) thick iron ring, the outer edge of the outer growth of more than 10 centimeters, the bigger, the better, the higher the security against the damage to the dismantling of the locks; can also be padded inside the door to raise the lock seat.
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Home burglary
My home is always stolen ~ ~ ~ either the locks were trick, or the door was smashed, reported to the public security, now the public security does not give money not to do 。。。。。。 The people of the countryside are simply ignored, yesterday I went out to work, and came back at night to find the computer don't steal, the police, the police asked me to invoice, no computer invoice will not be processed, but I did not ask for an invoice when I bought the computer, so the police do not care about this matter. I am very sad, my home a *** was stolen 4 times, I have to go out to work ah, can not day and night in the home to watch it so I want to install a TV to put the kind of monitor, but I do not understand, in the end how to say it? What should I buy? What's the name of that monitor? Help me, okay? Hey, the world is too crazy, I want to install one of those things at home, who can help me? Thank you
Question added: I am a farmer's child, the family does not have too much money just want to fight, I hope you consider my financial situation to give me a suitable monitor, as long as the kind of daytime all-day thing to record the kind of good, the best to be small and well hidden kind of, thank you. I'm going to cry. Why won't anyone give me a satisfactory answer?
Digging a cellar and burying treasures when you're away from home is standard parlance for holding the fort.
Or dig a tunnel under the police station and build a stash that is networked to the police station.
Or just dig right in front of the police station. What anti-theft devices, cameras, hiring security guards, renting a warehouse, renting a bank safe are all totally free, the security of locks, door locks, security doors are judged by the time it takes to break them, which is much better than them.
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How are expansion bolts stressed when the wall is hollow block?
I am installing the invisible security net, often encountered hollow brick wall, M6 * 80 expansion bolts into it, or loose. I don't know what is the best way?
Grouting ！！！！！！！！ Especially grouting expansion cement
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On the issue of installing security windows
Baby already walks, the home windows are quite low, and it is not possible to look at him 24 hours a day for fear that he will go to climb the window, do you think there is a need to install security windows it
Life is the most ！！！！！！！！！
The first nylon rope to do the net, multi-layered, in order to prevent the metal wire injury to the baby, easily do not use the wire diameter of the small metal net.