CN114526760A - Shell opening monitoring method - Google Patents
Shell opening monitoring method Download PDFInfo
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- CN114526760A CN114526760A CN202210022815.4A CN202210022815A CN114526760A CN 114526760 A CN114526760 A CN 114526760A CN 202210022815 A CN202210022815 A CN 202210022815A CN 114526760 A CN114526760 A CN 114526760A
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- Prior art keywords
- initial value
- adjustable resistor
- gear
- cover
- resistance value
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000002159 abnormal effect Effects 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/16—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance
- G01D5/165—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance by relative movement of a point of contact or actuation and a resistive track
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/86—Secure or tamper-resistant housings
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The invention belongs to the technical field of shell opening monitoring, and discloses a shell opening monitoring method, which adopts a monitoring system, wherein the monitoring system comprises: the gear is arranged in the shell, an adjustable resistor is arranged on the gear, and the resistance value of the adjustable resistor is changed when the gear rotates; the rack is arranged on the cover and can be meshed with the gear, and when the cover is opened or closed, the rack can drive the gear to rotate so as to change the resistance value of the adjustable resistor; the shell opening monitoring method comprises the following steps: whether the initial value needs to be reconfigured; if the current resistance value of the adjustable resistor is not the same as the initial value, the cover is opened abnormally and is marked as an abnormal state; if the two signals are the same, entering a normal working mode; if reconfiguration is required, reconfiguration is performed. By the monitoring system and the monitoring method, whether the cover is abnormally opened or not can be determined, and the problem that other cover opening monitoring is easy to crack is solved.
Description
Technical Field
The invention belongs to the technical field of shell opening monitoring, and particularly relates to a shell opening monitoring method.
Background
The encryption device needs to monitor whether the illegal person is opened by the illegal shell in order to prevent the illegal person from stealing important data through the dismantling device. At present, the shell opening monitoring on the market is realized in a single mode, such as a mechanical button or an illumination mode, and the principle is that the state of the mechanical button can be changed or the illumination can be changed when the shell is opened so as to achieve the purpose of monitoring.
However, when the shell is opened and analyzed without being powered on, a corresponding coping method is easily found, for example, a non-lock switch is pressed or a photosensitive sensor is covered and then powered on, which causes the data protection means to be invalid.
Therefore, a method for monitoring the opening of the housing is needed to solve the above technical problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a shell opening monitoring method which can determine whether a cover is opened abnormally and the resistance values of a gear and rack structure change at any time, so that the problem that other cover opening monitoring is easy to crack is solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
there is provided a housing opening monitoring method employing a monitoring system comprising:
the gear is arranged in the shell, an adjustable resistor is arranged on the gear, and the resistance value of the adjustable resistor is changed when the gear rotates;
the rack is arranged on the cover and can be meshed with the gear, and when the cover is opened or closed, the rack can drive the gear to rotate so as to change the resistance value of the adjustable resistor;
the shell opening monitoring method comprises the following steps:
whether the initial value needs to be reconfigured;
if the reconfiguration is not needed, detecting whether the current resistance value of the adjustable resistor is the same as the initial value or not, if the current resistance value of the adjustable resistor is different from the initial value, if the current resistance value of the adjustable resistor is abnormal, the cover is opened, and the cover is marked to be in an abnormal state; if the two signals are the same, entering a normal working mode;
if reconfiguration is required, reconfiguration is performed.
As a preferred technical scheme of the shell opening monitoring method, the adjustable resistor is a single-ring adjustable resistor.
As a preferred technical solution of the shell opening monitoring method, the reconfiguration includes a configuration state waiting configuration instruction, and the configuration instruction includes setting an initial value, updating the initial value, and exiting the configuration;
setting an initial value comprises reading the current resistance value of the adjustable resistor and storing the current resistance value as an initial value;
updating the initial value comprises reading the current resistance value of the adjustable resistor to replace the stored initial value and storing;
and exiting the configuration after the initial value is set or updated.
As a preferred technical solution of the shell opening monitoring method, an initial value needs to be set after initial use or abnormal opening.
As a preferred technical solution of the case opening monitoring method, the initial value needs to be updated after the cover is normally opened.
As a preferable technical solution of the method for monitoring the opening of the housing, the gear, the rack, and the cover are made of the same material.
As a preferred technical scheme of the shell opening monitoring method, the adjustable resistor is adhered to the gear.
As a preferable embodiment of the method for monitoring the opening of the housing, the rack is fixed to the cover by a screw.
Compared with the prior art, the invention has the following beneficial effects:
when the cover is illegally disassembled, the cover inevitably drives the gear to rotate through the rack, so that the adjustable resistor is driven to rotate, and the resistance value of the adjustable resistor is changed; due to the randomness of the meshing points of the gear and the rack, 100% restoration of the meshing surfaces of the gear and the rack is difficult to realize after disassembly, and meanwhile, the resistance value is difficult to restore to the previous data, so that when equipment is started, whether the cover is opened or not is monitored, the resistance value and the initial value are monitored to be different, the abnormal state is judged, and data protection operation can be carried out immediately, so that the defect that other uncovering monitoring is easy to crack is overcome.
When the cover is normally opened and closed, the initial value can be reset, and the equipment is prevented from entering an abnormal state by mistake.
By the monitoring system and the monitoring method, whether the cover is abnormally opened or not can be determined, and the resistance values of the gear and rack structure change at any time, so that the problem that other cover opening monitoring is easy to crack is solved.
Drawings
FIG. 1 is a schematic structural diagram of a monitoring system according to the present invention;
fig. 2 is a schematic structural diagram of a housing opening monitoring method provided by the present invention.
Wherein, 1, a shell; 2. a cover; 3. a gear; 4. a rack; 5. and (4) an adjustable resistor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1 and 2, the present embodiment discloses a housing opening monitoring method using a monitoring system including a gear 3 and a rack 4.
The gear 3 is rotatably arranged in the shell 1, the gear 3 is provided with an adjustable resistor 5, and the resistance value of the adjustable resistor 5 is changed when the gear 3 rotates. The adjustable resistor 5 is a single-turn adjustable resistor 5, which is different from a multi-turn resistor in that the resistance value of the single-turn adjustable resistor 5 is greatly changed by a small rotation, i.e. the sensitivity of the single-turn adjustable resistor 5 is high. Specifically, the adjustable resistor 5 is bonded to the gear 3, specifically, to one side of the gear 3 through glue.
The rack 4 is arranged on the cover 2, the rack 4 can be meshed with the gear 3, and when the cover 2 is opened or closed, the rack 4 can drive the gear 3 to rotate so that the resistance value of the adjustable resistor 5 is changed. The toothed rack 4 is fixed to the lid 2 by means of screws. The gear 3, the rack 4 and the cover 2 are made of the same material. The resistance value is ensured to be the same and not to be changed under the normal working state due to the factors of expansion with heat and contraction with cold.
The shell opening monitoring method comprises the following steps:
whether the initial value needs to be reconfigured;
if the reconfiguration is not needed, detecting whether the current resistance value of the adjustable resistor 5 is the same as the initial value, if the current resistance value is different, the cover 2 is opened abnormally, and if the current resistance value is the same, entering a normal working mode;
if reconfiguration is required, reconfiguration is performed.
Specifically, the reconfiguration includes a configuration state waiting configuration instruction, and the configuration instruction includes setting an initial value, updating the initial value, and exiting the configuration;
setting an initial value comprises reading the current resistance value of the adjustable resistor 5 and storing the current resistance value as an initial value;
updating the initial value comprises reading the current resistance value of the adjustable resistor 5 to replace the stored initial value and storing;
and exiting the configuration after the initial value is set or updated.
Specifically, the initial value needs to be set after the initial use or abnormal opening, and the initial value needs to be updated after the normal opening of the lid 2.
The specific configuration flow is as follows:
s1, after starting up, waiting for whether an initial value reconfiguration instruction is received within a first preset time (specifically 1S) or according to specific actual conditions, wherein the initial value reconfiguration instruction is artificial external input; step S2 is performed if a reconfiguration initial value instruction is received, step S4 is performed if a reconfiguration initial value instruction is not received,
s2, waiting for a configuration instruction;
s3, determining which one of the initial value setting, initial value updating and configuration exiting is specified by the configuration command,
if the current resistance value is the initial value setting instruction, reading the current resistance value of the adjustable resistor 5 and storing the current resistance value as an initial value, and then performing step S2;
if the command is the update initial value command, reading the current resistance value of the adjustable resistor 5 and storing the current resistance value as an initial value, replacing the stored initial value in the process, and then performing step S2;
if the command is an exit configuration command, go to step S4;
s4, detecting the current resistance value of the adjustable resistor 5;
s5, comparing whether the current resistance value is the same as the initial value, if so, entering a normal working mode; if the difference is not the case, the cover 2 is abnormally opened, the abnormal state is marked, and the encryption and decryption work is stopped.
When the cover 2 is illegally disassembled, the gear 3 is inevitably driven to rotate through the rack 4, so that the adjustable resistor 5 is driven to rotate, and the resistance value of the adjustable resistor is changed; due to the randomness of the occlusion points of the gear 3 and the rack 4, 100% restoration of the occlusion surfaces of the gear 3 and the rack 4 is difficult to realize after disassembly, and meanwhile, the resistance value is difficult to restore to the previous data, so that when equipment is started, whether the cover 2 is opened or not is monitored, the resistance value and the initial value are different when the cover is monitored, the abnormal state is judged, data protection operation can be performed immediately, and the defect that other cover opening monitoring is easy to crack is overcome.
When the cover 2 is normally opened, the initial value can be reset after the cover 2 is closed, and the equipment is prevented from entering an abnormal state by mistake.
By the monitoring system and the monitoring method, whether the cover 2 is abnormally opened or not can be determined, and the resistance values of the structures of the gear 3 and the rack 4 change at any time, so that the problem that other cover opening monitoring is easy to crack is solved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. A method of monitoring opening of a housing, the method employing a monitoring system comprising:
the gear (3) is arranged in the shell (1), the gear (3) is provided with an adjustable resistor (5), and the resistance value of the adjustable resistor (5) when the gear (3) rotates changes;
the rack (4) is arranged on the cover (2), the rack (4) can be meshed with the gear (3), and when the cover (2) is opened or closed, the rack (4) can drive the gear (3) to rotate so as to change the resistance value of the adjustable resistor (5);
the shell opening monitoring method comprises the following steps:
whether the initial value needs to be reconfigured;
if the reconfiguration is not needed, detecting whether the current resistance value of the adjustable resistor (5) is the same as the initial value or not, if the current resistance value of the adjustable resistor is different from the initial value, if the current resistance value of the adjustable resistor is abnormal, the cover (2) is opened, and marking the cover as an abnormal state; if the two signals are the same, entering a normal working mode;
if reconfiguration is required, reconfiguration is performed.
2. A housing opening monitoring method according to claim 1, characterized in that the adjustable resistor (5) is a single turn adjustable resistor (5).
3. The method of claim 1, wherein the reconfiguration includes a configuration state wait configuration command, the configuration command including setting an initial value, updating the initial value, and exiting the configuration;
setting an initial value comprises reading the current resistance value of the adjustable resistor (5) and storing the current resistance value as an initial value;
updating the initial value comprises reading the current resistance value of the adjustable resistor (5) to replace the stored initial value and storing the initial value;
and exiting the configuration after the initial value is set or updated.
4. A housing opening monitoring method according to claim 3, characterized in that an initial value needs to be set after initial use or abnormal opening.
5. A housing opening monitoring method according to claim 3, characterized in that the initial value needs to be updated after normal opening of the lid (2).
6. Method for monitoring the opening of a housing according to claim 1, characterized in that the gear (3), the rack (4) and the cover (2) are of the same material.
7. Method for monitoring the opening of a housing according to claim 1, characterized in that said adjustable resistor (5) is glued to said toothed wheel (3).
8. Method for housing opening monitoring according to claim 1, characterized in that the rack (4) is fixed to the lid (2) by means of screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210022815.4A CN114526760A (en) | 2022-01-10 | 2022-01-10 | Shell opening monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210022815.4A CN114526760A (en) | 2022-01-10 | 2022-01-10 | Shell opening monitoring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114526760A true CN114526760A (en) | 2022-05-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210022815.4A Pending CN114526760A (en) | 2022-01-10 | 2022-01-10 | Shell opening monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114526760A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4588949A (en) * | 1983-09-16 | 1986-05-13 | Sangamo Weston, Inc. | Meter removal indicator |
| CN1076534A (en) * | 1992-02-26 | 1993-09-22 | 国际商业机器公司 | Personal computer system and its implementation with security protection feature |
| EP1431766A1 (en) * | 2002-12-16 | 2004-06-23 | Iskraemeco, Merjenje in Upravljanje Energije, D.D. | Casing adapted to detect any opening of the casing |
| CN102231945A (en) * | 2011-04-29 | 2011-11-02 | 三一重工股份有限公司 | Tamper device and global position system (GPS) moving target monitoring terminal |
| CN103294141A (en) * | 2012-04-16 | 2013-09-11 | 关涛 | Safety protection computer case |
| CN113806828A (en) * | 2021-09-22 | 2021-12-17 | 深圳市共进电子股份有限公司 | Cover opening protection device and method |
-
2022
- 2022-01-10 CN CN202210022815.4A patent/CN114526760A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4588949A (en) * | 1983-09-16 | 1986-05-13 | Sangamo Weston, Inc. | Meter removal indicator |
| CN1076534A (en) * | 1992-02-26 | 1993-09-22 | 国际商业机器公司 | Personal computer system and its implementation with security protection feature |
| EP1431766A1 (en) * | 2002-12-16 | 2004-06-23 | Iskraemeco, Merjenje in Upravljanje Energije, D.D. | Casing adapted to detect any opening of the casing |
| CN102231945A (en) * | 2011-04-29 | 2011-11-02 | 三一重工股份有限公司 | Tamper device and global position system (GPS) moving target monitoring terminal |
| CN103294141A (en) * | 2012-04-16 | 2013-09-11 | 关涛 | Safety protection computer case |
| CN113806828A (en) * | 2021-09-22 | 2021-12-17 | 深圳市共进电子股份有限公司 | Cover opening protection device and method |
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Application publication date: 20220524 |