WO2012146152A1

WO2012146152A1 - Removal prevention equipment and gps monitoring terminal of moving target

Info

Publication number: WO2012146152A1
Application number: PCT/CN2012/074461
Authority: WO
Inventors: 周翔; 李俊; 杨栋
Original assignee: 湖南三一智能控制设备有限公司; 三一重工股份有限公司
Priority date: 2011-04-29
Filing date: 2012-04-20
Publication date: 2012-11-01
Also published as: CN102231945A

Abstract

A removal prevention equipment and a GPS monitoring terminal of moving target are provided. The removal prevention equipment includes a case(2), a handle(1), an elastic component(7) for driving the handle(1), a ratchet(3), a variable resistor(4) coaxially connected to the ratchet, a pawl(5), a pawl return component(6), and driving teeth(11) on the body of the handle(1) for engaging the ratchet(3). By employing the ratchet mechanism with the ratchet(3) engaging the pawl(5) and the driving teeth(11), once the removal occurs, the handle(1) is driven by the elastic component(7) to extend out of the case(2), and the driving teeth(11) drives the ratchet(3) to rotate because of the moving of the handle(1). The rotating ratchet(3) would change the resistance value of the variable resistor(4), and a changing signal is provided to the control circuit. After rotating, the ratchet(3) is fixed because of the securing function of the pawl(5), therefore, even if a power failure occurs in the system, a single-chip microcomputer could read out the changed resistance value signal of the variable resistor after the power recovers. The removal prevention equipment involves a record function, and could record that whether the removal occurs despite the power failure, and once the power recovers, an alarm is given. With power supply, the alarm is given once the removal occurs.

Description

-Partial dismantling device and GPS mobile target monitoring terminal This application claims to be submitted to the China Patent Office on April 29, 2011, application number 201110109502.4, the Chinese patent entitled "A tamper device and GJPS mobile target monitoring terminal" Priority of the application, the entire contents of which are incorporated herein by reference.

Technical field

The present invention relates to a tamper-removing device, and further to a GPS mobile target monitoring terminal equipped with the tamper-preventing device.

Background technique

At present, in the field of construction machinery, devices related to the control of construction machinery and equipment, such as electronic control instruments, electric control boxes or GPS mobile target monitoring terminals, etc., because these devices and devices are more important, except for professionals, outsiders are not allowed to open and disassemble at will. . In order to prevent the user from opening and causing damage, the tamper is installed on the device or device. Used to prevent disassembly and provide the manufacturer with information on whether or not there is disassembly.

At present, the more commonly used tamper mechanisms have the following two mechanisms.

The detachment device of the infrared radiation detector is mainly composed of a mounting bracket, a cover and an alarm circuit; the mounting bracket is composed of a bottom plate and a vertical plate, and has an "L" shape, and the vertical plate is provided with a strip shape for fixing the cap The hole has a fixing hole formed on the bottom plate, and a light-melting switch for controlling the alarm circuit is disposed on the bottom plate; a resilient contact is disposed in the cover corresponding to the position of the tact switch. Once the cover is disengaged from the mounting bracket, the tactile switch action will trigger an alarm circuit and sound an alarm. The disadvantages are: The system cannot work under power failure, it can be self-recovery, and there is no recording function.

The other is a tamper-proof device for burglar alarms, including a push rod, a casing, an elastic member, a movable contact piece and a static contact piece, which are connected to an external circuit through a connecting wire, wherein one end of the pusher is extended through the small hole Out of the outer casing, the movable contact piece is fixedly integrated with the push sill, and the push rod is provided with an elastic member. Under the action of the elastic force, the push rod moves axially along the guide rail of the inner wall of the outer casing, and drives the movable contact piece and the static touch fixed in the outer casing. The slice realizes the mutual conversion of the on and off states. In the normal installation state, the push rod is supported by the inner wall of the periphery of the installation. When there is an external force, the periphery of the installation is disengaged, and when the pressure on the push rod is subsided, the push rod is displaced under the action of the elastic force to realize the movable contact piece and The change of the on-off state of the static contact piece triggers the alarm device and sends an alarm signal to achieve the purpose of tampering. The structure also has the above disadvantages: The system cannot work under power failure, can be self-recoverable, and has no recording function. Summary of the invention In order to overcome the above-mentioned drawbacks and deficiencies of the prior art, the present invention provides a tamper-evident device using a ratchet structure, which not only serves the existing tamper-proof purpose, but also records the disassembled information and provides the manufacturer with disassembly record information.

In addition, the present invention also provides a GPS mobile target monitoring terminal mounted with the detaching device.

The invention provides a tampering device, comprising: a casing, a push rod, an elastic component for driving the push rod to move, and a wheel that is rotatable relative to the pusher, connected to the ratchet and has a resistance value with a ratchet A rotating variable resistor that resets the spine/reset element, the pusher body having drive teeth that mesh with the ratchet.

Preferably, a reset element for resetting the pawl is further included.

Preferably, the elastic member is a spring, and one end of the spring abuts against the outer casing, and the other end abuts against the push rod.

Preferably, the body of the outer casing is provided with a through hole through which the push rod is extended, and the elastic member is used for driving the rod 412 to protrude from the through hole.

Preferably, the ratchet is located in the outer casing and is rotatably coupled to the outer casing.

Preferably, the resetting member is a spring piece, and one end of the elastic piece is fixed and the other end is abutted against the spine claw.

Optionally, the one end of the pawl is rotatably connected to the outer casing, and the other end is abutted against the ratchet tooth by the elastic piece, and further comprises a positioning component, wherein the claw is located at the reset component Locating between components.

Optionally, the body of the push rod is provided with an elastic element, one end of the elastic element abuts against the push rod body, and the other end abuts against the driving tooth, the driving tooth is in the ^ The top of the tooth is placed under the top of the pusher body and is reset under the top of the elastic element.

The present invention provides a GPS mobile object monitoring terminal, comprising a box body, a cover covering the box body, a GPS circuit system installed in the box body, and any one of the above items is also installed in the box body. In the tamper device, the front end of the push rod abuts against the cover.

Preferably, the GPS circuit system comprises a single chip, and the variable resistor is connected to a signal input terminal of the single chip machine.

Preferably, in a state in which the cover is closed with the case, the push rod is located in the outer casing, and the elastic member is in a compressed state. The tampering device provided by the invention has the following beneficial effects: (1) a ratchet mechanism that uses a ratchet, a pawl and a driving tooth to mesh with each other, and once disassembled, the pusher pushes out the outer casing driven by the spring while driving The tooth drives the ratchet under the action of the push rod movement, and the rotating ratchet changes the resistance of the variable resistor, thereby providing a change signal for the control circuit. After the rotation, the ratchet is fixed by the positioning of the pawl, even if the system is powered off. After recovery, the MCU can also read the resistance signal changed by the variable resistor. The tamper-removing device has a recording function, and it can record whether there is disassembly in the case of power failure, and the alarm can be recovered when one end is restored to the power supply; (2) A compression spring is arranged between the driving tooth and the push rod body, and the compression spring abuts against the driving tooth. In the initial state, the driving tooth meshes with the ratchet tooth under the top of the compression spring, and the movement of the pushing rod is The rotation of the ratchet is driven by the driving tooth. When the push rod needs to be reset back to the original position, the push rod is moved downward, the ratchet tooth will abut against the driving tooth, and the compression spring is compressed, so that the push rod moves downward. After moving into position, the drive teeth are reset under the top of the compression spring. The structure is elastically abutted by the compression spring, and is reset, which reduces the hard friction between the driving teeth and the ratchet teeth during the resetting, and prolongs the service life of the teeth.

The GPS moving target monitoring terminal provided by the invention has the beneficial effects that: the above-mentioned tamper-preventing device is installed in the box body, and the front end of the push rod is abutted against the lid of the box, and once the lid is disassembled and opened, the push rod is When the spring is extended, the driving gear will drive the ratchet to rotate, and the variable circuit signal changes. The single-chip microcomputer in the GPS circuit system will "receive the change signal, and then issue corresponding control commands to prevent the GPS moving target monitoring terminal from being disassembled. If the disassembly occurs, record it in time and feedback the disassembly information.

Appendix

1 is a schematic view showing the overall structure of a tampering device of the present invention; and FIG. 2 is a circuit diagram of a varistor accessing circuit in the tampering device of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. As shown in FIG. 1 , a tamper-preventing device provided by the present invention includes a casing 2 and a casing 2 having a hollow structure. The body is provided with a through hole 21 through which the push rod 1 can be extended, and the push rod 1 is disposed on the outer casing. 2, the front end thereof is opposite to the through bar 21 so as to extend out of the outer casing 2 from the through hole 21, and drive the elastic member 7 of the pusher 1 to move. The elastic member 7 is a spring, which is placed on the push rod 1, and one end of the spring It abuts against the inner wall of the outer casing 2 and the other end abuts against the push rod 1. Also included is a ratchet 3 rotatable relative to the push rod 1, a variable resistor 4 coupled to the ratchet 3 and having a resistance value that varies with the rotation of the ratchet wheel 3, resetting the reset element 6 of the pawl 5, the push The body of the rod 1 has drive teeth n that mesh with the ratchet 3.

As shown in Fig. 1, a ratchet 3 is located in the outer casing 2 and is rotatably coupled to the outer casing 2, and the rotational connection described herein is connected to the outer casing 2 via a pin shaft, which is rotatable by itself. The resetting member 6 is a spring piece, and one end of the elastic piece is fixed on the outer casing 2, and the other end is abutted against the pawl 5. One end of the pawl 5 is rotatably connected to the outer casing 2, and the other end is abutted against the ratchet 3 teeth under the action of the elastic piece, in order to prevent the pawl 5 from falling under the elastic piece and the ratchet 3 The tooth is disengaged, and is further provided with a positioning component. The positioning component is a positioning post fixed on the outer casing 2 and located on one side of the pawl 5, and the pawl 5 is located between the elastic piece and the positioning post, when the pawl 5 is shrapnel When entering the ratchet 3, the other side of the pawl 5 abuts against the positioning post, and does not leave the ratchet 3 under the limit of the positioning post. The rotation of the pawl 5 and the outer casing 2 is also connected to the outer casing through the pin shaft, and is rotatable by itself. The pawl 5 abuts against the teeth of the ratchet wheel 3 under the action of the resetting member 6. When the ratchet wheel 3 rotates, the teeth of the ratchet wheel 3 The pawl 5 is ejected. When the ratchet stops rotating, the pawl 5 re-enters the teeth of the ratchet 3 under the elastic force of the resetting member 6, and is positioned against the top. At this time, no matter whether the seed is reset or not, it will not affect the rotation of the ratchet 3. Therefore, after the power is turned off again, the MCU can also read the resistance of the variable resistor 4, and the disassembly in the case of power failure can also be performed. Implement the record.

In another preferred embodiment, the body of the push rod 1 is provided with a compression spring, one end of the compression spring abuts against the push rod body 1 and the other end abuts against the driving tooth 11 The driving tooth 11 enters the body of the pusher 1 under the abutment of the teeth of the * wheel 3, and is reset under the top of the compression spring. The structure facilitates the driving of the tooth 1 when the push rod 1 moves downwards, and does not cause hard friction with the ratchet tooth. Compared with the above embodiment, the structure is elastically abutted and reset by the compression spring, which is reduced in The hard friction between the tooth and the ratchet tooth is promoted during the reset to prolong the service life of the tooth. Thus, the pawl 5 is soft-ended

It can be flexibly bent and reset. When the ratchet wheel 3 rotates, the tooth moves the front end of the pawl 5 to bend the front end. When the rotation is stopped, the front end of the pawl 3

Paws 5 can be used with steel sheets or other

Strength at positioning, preventing ratchet 3

The front end to the rear end of the claw gradually increase.

In addition to the above-mentioned tampering device, a GPS moving target monitoring terminal is provided, including a box body, a GPS circuit system that is attached to the box body and mounted in the box body, and the box body is further installed with the above-mentioned scheme. The tampering device has a front end of the push rod 1 abutting against the cover. The GPS circuit system includes a single chip microcomputer, and the variable resistor 4 is connected to a signal input terminal of the single chip microcomputer. In a state in which the cover is closed with the case, the push rod 1 is located in the outer casing 2, and the elastic member 7 is in a compressed state. In practical applications, the front end of the push rod abuts against the lid, and after the lid is closed with the box body, the push rod is pressed into the outer casing of the tamper device by the lid, and the elastic member 7 is in a compressed state, once the lid is When the disassembly is opened, the push rod i is extended by the action of the spring, and the driving gear 11 drives the ratchet wheel 3 to rotate, and the variable circuit signal changes.

Discharge information, specifically in the application, once the MCU receives the disassembled signal, the information is sent through the communication terminal. After receiving the information, the remote terminal knows that the device at the location is disassembled.

The GPS mobile target monitoring terminal is a well-known technology in the art, and the internal GPS circuit system provides the location information of the engineering machinery equipment. Once the GPS mobile target monitoring terminal is disassembled and damaged, the manufacturer loses the monitoring of the construction machinery state. Therefore, the mobile target monitoring terminal is equipped with a tamper-proof device, which can effectively prevent disassembly, and can record and feed back information in time even if disassembly occurs, thereby playing a monitoring role.

As shown in Figure 2, R1 and variable resistor 7 (ie, R2 in the figure) form a voltage divider loop. When the resistance of R2 changes, the sampling voltage of R3 must be changed, thus driving the DI pin of the main control CPU. Flat change. After the main control CPU detects this change, it immediately records and local alarms, and simultaneously performs remote alarms and remote locks through the GPS module, from 3⁄4 to the purpose of tampering. Since the GPS mobile target monitoring terminal is a well-known technology in the art, and the improvement is that the above-mentioned tamper device is installed, those skilled in the art can realize the content described in the specification, so the structure and connection are not used here. The connection relationship and working principle are not described. The specific installation structure is that the tamper device is installed in the box of the monitoring terminal. The push rod 1 is located at the connection between the box and the cover. The rod 1 abuts against the lid, and once the lid is removed and opened, the pusher 1 can be extended by the elastic member 7 to produce a subsequent action.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

A tampering device comprising a housing (2), a pusher (1), and an elastic member (7) for driving the push rod (1) to move, characterized in that: further comprising a push rod (relative to the push rod) 1) a rotating ratchet (3), a variable resistor (4) connected to the ratchet (3) and having a resistance value that changes with the rotation of the ratchet (3), a pawl (5) of the positioning ratchet (3), the push The body of 衧(1) has drive teeth (11) that mesh with the ratchet (3).

2. A tamper evident device according to claim 1, further comprising a reset element (6) for resetting said pawl (5).

The tampering device according to claim 1 or 2, wherein: the elastic member (7) is a spring, one end of the spring abuts against the outer casing (2), and the other end abuts against the The putter (1).

The tamper-removing device according to claim 3, wherein: the body of the outer casing (2) is provided with a through hole (21) through which the push rod (I) protrudes, and the elastic member ( 7) for driving the push button (1) to protrude from the through hole (21).

The tamper device according to claim 4, characterized in that: the ratchet (3) is located in the outer casing (2) and is rotatably coupled to the outer casing (2).

The tamper-removing device according to claim 5, wherein the reset member (6) is a spring piece, and one end of the elastic piece is fixed and the other end is abutted against the claw (5).

7. The tamper device according to claim 6, wherein: the end of the pawl (5) is rotatably coupled to the outer casing (2), and the other end is abutted against the outer portion of the pawl In the ratchet (3) tooth, a positioning element is also included, the pawl being located between the reset element and the positioning element.

The tampering device according to any one of claims 1 to 3, wherein: the body of the pusher (1) is provided with an elastic member, and one end of the elastic member abuts against the push a rod body (1) with the other end abutting against the driving tooth (11), the driving tooth (11) entering the pusher (1) body under the top of the ratchet (3) tooth Resetting under the top of the elastic element.

9. A GPS moving target monitoring terminal, comprising a box body, a lid covering the box body, and a GPS circuit system installed in the box body, wherein: the box body further has the above claims The tamper device according to any one of 1 to 7, wherein the front end of the push rod (1) abuts against the cover.

10. The GPS mobile target monitoring terminal according to claim 9, wherein: the GPS circuit system comprises a single chip, and the variable resistor (4) is connected to a signal input terminal of the single chip microcomputer.

The GPS moving object monitoring terminal according to claim 9, wherein: in a state in which the cover is closed with the case, the pusher (1) is located in the outer casing (2), The elastic member (7) is in a compressed state.

The GPS moving object monitoring terminal according to claim 9, wherein the elastic member drives the push rod to move when the lid portion against which the pusher is abutted is separated from the casing.