CN114876287A - Method and device for detecting vault door lock - Google Patents
Method and device for detecting vault door lock Download PDFInfo
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- CN114876287A CN114876287A CN202210477843.5A CN202210477843A CN114876287A CN 114876287 A CN114876287 A CN 114876287A CN 202210477843 A CN202210477843 A CN 202210477843A CN 114876287 A CN114876287 A CN 114876287A
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- door lock
- disturbance
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B37/00—Permutation or combination locks; Puzzle locks
- E05B37/0003—Permutation or combination locks; Puzzle locks preventing detection of the combination
- E05B37/001—Permutation or combination locks; Puzzle locks preventing detection of the combination through listening or feeling
- E05B37/0013—Permutation or combination locks; Puzzle locks preventing detection of the combination through listening or feeling by producing noise
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B65/00—Locks or fastenings for special use
- E05B65/0075—Locks or fastenings for special use for safes, strongrooms, vaults, fire-resisting cabinets or the like
Abstract
The invention discloses a method and a device for detecting a vault door lock, wherein the method comprises the following steps: along with the rotation of a dial of the safe door lock, a direct-current generator connected with a rotating shaft of the dial generates a voltage signal; amplifying, rectifying and disturbing the voltage signal to obtain a disturbed output signal; and analyzing the output signal added with the disturbance, and determining the rotation information of the cashbox door lock dial under the condition of avoiding obtaining the cashbox door lock password. The invention can accurately judge the rotation information of the dial of the safe door lock, such as the rotation direction, the rotation state and the rotation speed, under the condition of reducing or even avoiding the possibility of reversely pushing the password of the safe door lock, so as to realize the quick detection of the safe door lock.
Description
Technical Field
The invention relates to the technical field of monitoring, in particular to a method and a device for detecting a safe door lock.
Background
In vault door combination lock monitoring equipment, a dial stalled or slowed rotation while rotating can cause a combination to be invalid. In order to monitor the normal operation of an operator and avoid false lock of a coded lock and false lock closing of a vault door caused by wrong operation, the rotating direction, the rotating state and the rotating speed of a dial plate need to be effectively monitored.
According to the management system of the coded lock of the bank, the code of the coded lock can be only mastered by an operator of the coded lock, and the input of the code is strictly ensured not to be peeped and monitored. Because the rotation angles of the dial plates correspond to the passwords one to one, the detection of the rotation angle of the dial plates by the equipment should ensure the inaccuracy in detection in order to avoid unknown danger caused by the theoretical monitoring capability of the equipment; meanwhile, in order to accurately judge the rotating speed and the pause condition, the detection needs to have enough approximation degree, and excessive deviation cannot occur.
At present, the vault door of a bank is not provided with such monitoring equipment in the use process, the compliance of all operations can only be manually monitored through a remote monitoring camera (clear dial code is avoided), fine operation cannot be identified, and the vault door does not have actual monitoring capability.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting a vault door lock, which solve the problem that the prior art does not have actual monitoring capability on the vault door lock.
The embodiment of the invention provides a method for detecting a safe door lock, which comprises the following steps: along with the rotation of a dial of the safe door lock, a direct-current generator connected with a rotating shaft of the dial generates a voltage signal; amplifying, rectifying and disturbing the voltage signal to obtain a disturbed output signal; and analyzing the output signal added with the disturbance, and determining the rotation information of the cashbox door lock dial under the condition of avoiding obtaining the cashbox door lock password.
Preferably, the amplifying, rectifying and disturbing the voltage signal to obtain a disturbed output signal includes: carrying out disturbance processing in the process of amplifying the voltage signal, and carrying out rectification processing on the obtained signal to obtain the output signal added with disturbance; wherein the performing of the perturbation process in the process of performing the amplification process on the voltage signal comprises: and adding stable disturbance based on the nonlinear relation between the input voltage and the output current of the N-channel depletion type MOSFET in the process of amplifying the voltage signal by using the N-channel depletion type MOSFET to obtain an amplified signal added with the stable disturbance.
Preferably, the amplifying, rectifying and disturbing the voltage signal to obtain a disturbed output signal includes: amplifying the voltage signal to obtain an amplified signal, and performing disturbance processing in the process of rectifying the amplified signal to obtain the output signal added with disturbance; wherein, the performing disturbance processing in the process of rectifying the amplified signal to obtain the output signal added with disturbance comprises: and in the process of rectifying the amplified signal by using the RC filter circuit, adding nonlinear disturbance based on the inherent nonlinear loss of the RC filter circuit to obtain an output signal with increased nonlinearity as the output signal with added disturbance.
Preferably, the amplifying, rectifying and disturbing the voltage signal to obtain a disturbed output signal includes: performing disturbance processing in the processes of sequentially performing amplification processing and rectification processing on the voltage signal to obtain the output signal added with disturbance; wherein, the process of sequentially amplifying and rectifying the voltage signals is disturbed, and the obtaining of the output signal added with disturbance comprises: adding stable disturbance based on the nonlinear relation between the input voltage and the output current of the N-channel depletion type MOSFET in the process of amplifying the voltage signal by using the N-channel depletion type MOSFET to obtain an amplified signal added with the stable disturbance; and in the process of rectifying the amplified signal added with the stable disturbance by using the RC filter circuit, adding the nonlinear disturbance based on the inherent nonlinear loss of the RC filter circuit to obtain the output signal added with the disturbance.
Preferably, the amplifying, rectifying, and disturbing the voltage signal to obtain a disturbed output signal includes: after the voltage signal is sequentially subjected to amplification processing and rectification processing, then disturbance processing is carried out to obtain the output signal added with disturbance;
after the voltage signal is sequentially amplified and rectified, the voltage signal is disturbed to obtain the disturbed output signal, wherein the disturbed output signal comprises: amplifying the voltage signal by using an amplifying circuit to obtain an amplified signal; rectifying the amplified signal by using a rectifying circuit to obtain a rectified signal; and carrying out disturbance processing on the rectified signal by using a disturbance signal generator to obtain an output signal added with disturbance.
Preferably, the dc generator is a dc brushed generator, and accordingly, the voltage signal having voltage jitter and instantaneous return-to-zero characteristics is generated based on voltage changes of brushes of the dc brushed generator during commutation.
Preferably, the rotation information of the vault door lock dial includes a rotation direction, a rotation speed, and a rotation state of the vault door lock dial, the analyzing of the output signal added with the disturbance is performed, and the determining of the rotation information of the vault door lock dial under the condition of avoiding obtaining the vault door lock password includes: determining an output voltage difference according to the voltage value of the output signal added with the disturbance and the known voltage value of the generator in a static state; according to the output voltage difference, the rotating direction and the rotating state of the cashbox door lock dial plate are determined; and determining the rotating speed of the cashbox door lock dial corresponding to the output voltage difference according to the known corresponding relation between the rotating speed of the direct current generator and the output voltage difference and the known corresponding relation between the rotating speed of the direct current generator and the rotating speed of the cashbox door lock dial.
Preferably, the method further comprises: determining the time of the cashbox door lock dial in a continuous rotation state from the beginning of rotation to the stop of rotation; determining the number of turns of continuous rotation of the cashbox door lock dial according to the time of the cashbox door lock dial in a continuous rotation state and the rotation speed; and determining the operation compliance or violation of the cashbox door lock dial according to the number of continuous rotating turns of the cashbox door lock dial.
The embodiment of the invention also provides a device for detecting the door lock of the safe, which comprises: the direct current generator is connected with a rotating shaft of the cashbox door lock dial and is used for generating a voltage signal along with the rotation of the cashbox door lock dial; the signal processing module is used for amplifying, rectifying and disturbing the voltage signal to obtain an output signal added with disturbance; and the door lock detection module is used for analyzing the output signal added with the disturbance and determining the rotation information of the cashbox door lock dial under the condition of avoiding obtaining the cashbox door lock password.
Preferably, the door lock detection module is further configured to: determining the time of the cashbox door lock dial in a continuous rotation state from the beginning of rotation to the stop of rotation, determining the number of continuous rotation turns of the cashbox door lock dial according to the time of the cashbox door lock dial in the continuous rotation state and the rotation speed, and determining the operation compliance or violation of the cashbox door lock dial according to the number of continuous rotation turns of the cashbox door lock dial.
In the embodiment of the invention, during the rotation of the cashbox door lock dial, the direct current generator connected with the rotating shaft of the dial generates a voltage signal, the voltage signal is amplified, rectified and disturbed to obtain a disturbed output signal, the disturbed output signal is analyzed, the rotation information of the dial, such as the rotation direction, the rotation state, the rotation speed and the like, is accurately judged, and meanwhile, because the output signal has disturbance, the rotation angle of the dial is difficult to accurately estimate, thereby avoiding the possibility of reversely pushing the cashbox door lock password.
Drawings
Fig. 1 is a flowchart of a method for detecting a vault door lock according to an embodiment of the present invention;
fig. 2 is a block diagram of a cashbox door lock detection apparatus according to an embodiment of the present invention;
fig. 3 is a schematic main structure diagram of a cashbox door lock detection device provided by an embodiment of the invention;
fig. 4 is a circuit diagram of signal processing of the cashbox door lock detecting device provided by the embodiment of the invention;
description of reference numerals: 1-belt drive structure; 2-a rotating shaft of the dial; 3-a transmission; 4-direct current brush generator.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described below are only for the purpose of illustrating and explaining the present invention, and are not to be construed as limiting the present invention.
Fig. 1 is a flowchart of a method for detecting a vault door lock according to an embodiment of the present invention, and as shown in fig. 1, the method includes:
step S101: along with the rotation of a dial of the safe door lock, a direct-current generator connected with a rotating shaft of the dial generates a voltage signal;
step S102: amplifying, rectifying and disturbing the voltage signal to obtain a disturbed output signal;
step S103: and analyzing the output signal added with the disturbance, and determining the rotation information of the cashbox door lock dial under the condition of avoiding obtaining the cashbox door lock password.
In the first embodiment, the step S102 includes: and carrying out disturbance processing in the process of amplifying the voltage signal, and carrying out rectification processing on the obtained signal to obtain the output signal added with disturbance. Wherein the performing of the perturbation process in the process of performing the amplification process on the voltage signal comprises: and adding stable disturbance based on the nonlinear relation between the input voltage and the output current of the N-channel depletion type MOSFET in the process of amplifying the voltage signal by using the N-channel depletion type MOSFET to obtain an amplified signal added with the stable disturbance.
In the second embodiment, the step S102 includes: and amplifying the voltage signal to obtain an amplified signal, and performing disturbance processing in the process of rectifying the amplified signal to obtain the output signal added with disturbance. Wherein, the performing disturbance processing in the process of rectifying the amplified signal to obtain the output signal added with disturbance comprises: and in the process of rectifying the amplified signal by using the RC filter circuit, adding nonlinear disturbance based on the inherent nonlinear loss of the RC filter circuit to obtain an output signal with increased nonlinearity as the output signal with added disturbance.
In the third embodiment, the step S102 includes: and after the voltage signal is sequentially amplified and rectified, carrying out disturbance processing to obtain the output signal added with disturbance. After the voltage signal is sequentially amplified and rectified, the voltage signal is disturbed to obtain the disturbed output signal, wherein the disturbed output signal comprises: amplifying the voltage signal by using an amplifying circuit to obtain an amplified signal; rectifying the amplified signal by using a rectifying circuit to obtain a rectified signal; and carrying out disturbance processing on the rectified signal by using a disturbance signal generator to obtain an output signal added with disturbance.
In addition, at least two of the three embodiments may be combined to obtain the output signal with disturbance added thereto, for example, the first and second embodiments are combined, and the step S102 may include: the voltage signal is subjected to disturbance processing in the processes of amplification processing and rectification processing in sequence to obtain the output signal added with disturbance, wherein the voltage signal is subjected to disturbance processing in the processes of amplification processing and rectification processing in sequence to obtain the output signal added with disturbance, and the disturbance processing comprises the following steps: adding stable disturbance based on the nonlinear relation between the input voltage and the output current of the N-channel depletion type MOSFET in the process of amplifying the voltage signal by using the N-channel depletion type MOSFET to obtain an amplified signal added with the stable disturbance; and in the process of rectifying the amplified signal added with the stable disturbance by using the RC filter circuit, adding the nonlinear disturbance based on the inherent nonlinear loss of the RC filter circuit to obtain the output signal added with the disturbance.
Furthermore, on the basis of the above-mentioned embodiments, the dc generator may be a dc brushed generator, such that the voltage signal having voltage jitter and transient return-to-zero characteristics is generated based on voltage variations of brushes of the dc brushed generator during commutation.
In this embodiment, the rotation information of the national treasury door lock dial includes a rotation direction, a rotation speed, and a rotation state of the national treasury door lock dial, and the step S103 may include: firstly, determining an output voltage difference according to the voltage value of the output signal added with disturbance and the known voltage value of the generator in a static state, wherein the voltage value of the generator in the static state is related to parameters of the generator and parameters of elements (such as a pull-up level, a divider resistor and a depletion diode) of a circuit where the generator is located, and is generally determined through actual measurement after installation; then according to the output voltage difference, determining that the rotation direction of the cashbox door lock dial is in forward rotation or reverse rotation and determining that the rotation state of the cashbox door lock dial is in a continuous rotation state or a rotation stop state, namely, when the output voltage difference is greater than zero, determining that the cashbox door lock dial is in forward rotation, and when the output voltage difference is less than zero, determining that the cashbox door lock dial is in reverse rotation, in other words, when the output voltage is not equal to zero, determining that the cashbox door lock dial is in a continuous rotation state, and when the output voltage is equal to zero, determining that the cashbox door lock dial is in a rotation stop state; and determining the rotating speed of the cashbox door lock dial corresponding to the output voltage difference according to the known corresponding relation between the rotating speed of the direct current generator and the output voltage difference and the known corresponding relation between the rotating speed of the direct current generator and the rotating speed of the cashbox door lock dial. The disturbance is added in the detection processing process of the voltage signal (namely the induced voltage) generated by the direct current generator, so that the final output signal is the output signal added with the disturbance, and therefore, the rotation information (such as the rotation direction, the rotation speed and the rotation state) of the cashbox door lock dial can be estimated by utilizing the voltage value of the output signal added with the disturbance, but the rotation angle of the cashbox door lock dial cannot be accurately estimated, and the precise detection method of the cashbox door lock, which can avoid obtaining the cashbox door lock password, is realized.
In this embodiment, when it is determined that the cashbox door lock dial starts to rotate, a timer is started, and when it is determined that the cashbox door lock dial finishes rotating, the time of being in a continuous rotation state is determined, so that the number of turns of the cashbox door lock dial in continuous rotation is determined according to the time of being in the continuous rotation state and the rotation speed of the cashbox door lock dial, and according to the number of turns of the cashbox door lock dial in continuous rotation, the operation compliance or violation of the cashbox door lock dial can be determined, for example, the number of turns of the cashbox door lock dial in incomplete rotation is enough, the operation is considered as violation, which is beneficial to monitoring the compliance of the cashbox door lock operation by a worker.
In the embodiment of the invention, during the rotation of the cashbox door lock dial, the direct current generator connected with the rotating shaft of the dial generates a voltage signal, the voltage signal is amplified, rectified and disturbed to obtain a disturbed output signal, the disturbed output signal is analyzed, the rotation information of the dial, such as the rotation direction, the rotation state, the rotation speed and the like, is accurately judged, and meanwhile, because the output signal has disturbance, the rotation angle of the dial is difficult to accurately estimate, thereby avoiding the possibility of reversely pushing the cashbox door lock password.
Fig. 2 is a block diagram of a cashbox door lock detection apparatus according to an embodiment of the present invention, and as shown in fig. 2, the apparatus includes: the system comprises a direct current generator 10, a signal processing module 20 and a door lock detection module 30.
The direct current generator 10 is connected with a rotating shaft of the cashbox door lock dial and is used for generating a voltage signal along with the rotation of the cashbox door lock dial;
the signal processing module 20 is configured to amplify, rectify, and disturb the voltage signal to obtain an output signal added with disturbance;
and the door lock detection module 30 is used for analyzing the output signal added with the disturbance and determining the rotation information of the cashbox door lock dial under the condition of avoiding obtaining the cashbox door lock password.
In the first embodiment, the signal processing module 20 is specifically configured to perform perturbation processing during the process of amplifying the voltage signal, and perform rectification processing on the obtained signal to obtain the output signal with perturbation added. Wherein the performing of the perturbation process in the process of performing the amplification process on the voltage signal comprises: and adding stable disturbance based on the nonlinear relation between the input voltage and the output current of the N-channel depletion type MOSFET in the process of amplifying the voltage signal by using the N-channel depletion type MOSFET to obtain an amplified signal added with the stable disturbance.
In the second embodiment, the signal processing module 20 is specifically configured to perform amplification processing on the voltage signal to obtain an amplified signal, and perform disturbance processing during rectification processing on the amplified signal to obtain the output signal with disturbance added. Wherein, the performing disturbance processing in the process of rectifying the amplified signal to obtain the output signal added with disturbance comprises: and in the process of rectifying the amplified signal by using the RC filter circuit, adding nonlinear disturbance based on the inherent nonlinear loss of the RC filter circuit to obtain an output signal with increased nonlinearity as the output signal with added disturbance.
In the third embodiment, the signal processing module 20 is specifically configured to perform the perturbation processing after sequentially performing the amplification processing and the rectification processing on the voltage signal, so as to obtain the output signal with the perturbation added. After the voltage signal is sequentially amplified and rectified, the voltage signal is disturbed to obtain the disturbed output signal, wherein the disturbed output signal comprises: amplifying the voltage signal by using an amplifying circuit to obtain an amplified signal; rectifying the amplified signal by using a rectifying circuit to obtain a rectified signal; and carrying out disturbance processing on the rectified signal by using a disturbance signal generator to obtain an output signal added with disturbance.
In addition, a disturbance-added output signal may also be obtained by combining at least two of the three embodiments, for example, by combining the first and second embodiments, where the signal processing module 20 is specifically configured to perform disturbance processing during both the processes of sequentially performing amplification processing and rectification processing on the voltage signal to obtain the disturbance-added output signal, where the obtaining the disturbance-added output signal includes: adding stable disturbance to the voltage signal in the process of amplifying the voltage signal by using the N-channel depletion type MOSFET based on the nonlinear relation between the input voltage and the output current of the N-channel depletion type MOSFET to obtain an amplified signal added with the stable disturbance; and in the process of rectifying the amplified signal added with the stable disturbance by using the RC filter circuit, adding the nonlinear disturbance based on the inherent nonlinear loss of the RC filter circuit to obtain the output signal added with the disturbance.
Furthermore, on the basis of the above-mentioned embodiments, the dc generator 10 may be a dc brushed generator, so that the voltage signal having voltage jitter and instantaneous return-to-zero characteristics is generated based on voltage changes of brushes of the dc brushed generator during commutation.
In this embodiment, the rotation information of the national treasury door lock dial includes a rotation direction, a rotation speed, and a rotation state of the national treasury door lock dial, and the door lock detection module 30 is specifically configured to determine an output voltage difference according to a voltage value of the output signal added with disturbance and a known voltage value of the generator in a static state; according to the output voltage difference, determining that the rotation direction of the cashbox door lock dial is forward rotation or reverse rotation and determining that the rotation state of the cashbox door lock dial is a continuous rotation state or a rotation stop state; and determining the rotating speed of the cashbox door lock dial corresponding to the output voltage difference according to the known corresponding relation between the rotating speed of the direct current generator and the output voltage difference and the known corresponding relation between the rotating speed of the direct current generator and the rotating speed of the cashbox door lock dial.
Further, the door lock detection module 30 may be further configured to start a timer when it is determined that the cashbox door lock dial starts to rotate, and determine time of being in a continuous rotation state when it is determined that the cashbox door lock dial finishes rotating, so that a number of turns of the cashbox door lock dial in continuous rotation is determined according to the time of being in the continuous rotation state of the cashbox door lock dial and the rotation speed, and an operation compliance or violation of the cashbox door lock dial can be determined according to the number of turns of the cashbox door lock dial in continuous rotation, for example, a sufficient number of turns of incomplete rotation is determined, and the cashbox door lock dial is considered to be an illegal operation.
In the embodiment of the invention, during the rotation of the cashbox door lock dial, the direct current generator connected with the rotating shaft of the dial generates a voltage signal, the voltage signal is amplified, rectified and disturbed to obtain a disturbed output signal, the disturbed output signal is analyzed, the rotation information of the dial, such as the rotation direction, the rotation state, the rotation speed and the like, is accurately judged, and meanwhile, because the output signal has disturbance, the rotation angle of the dial is difficult to accurately estimate, thereby avoiding the possibility of reversely pushing the cashbox door lock password.
The present invention will be described in detail below with reference to fig. 3 and 4.
Fig. 3 is a schematic structural diagram of a main body of the cashbox door lock detection device provided by the embodiment of the invention, and as shown in fig. 3, in order to achieve the effects of inaccurate measurement and sufficient monitoring capability, a micro-generator 4, a matched transmission mechanism and a monitoring module are added on a rotating shaft 1 of a dial plate. A DC brush micro generator (motor) 4 is driven by a driving belt wheel 2 and a speed changer 3. When the dial rotating shaft 1 rotates, induced voltage is generated at the output end of the generator 4, and disturbance such as voltage disturbance and time domain disturbance is added to the induced voltage through a disturbance circuit, wherein the time domain disturbance is disturbance caused by uneven rotating speed and irregular pause when a worker rotates the dial, and the rotating angle can be prevented from being accurately calculated through an integral algorithm. Finally, the monitoring module estimates the rotating speed and the rotating direction of the rotating shaft 1 by detecting the final output voltage, can meet the requirements of measuring the rotating speed, the rotating direction and the rotating continuity, can have enough deviation with the actual rotating angle, and avoids monitoring the password input value.
Considering that the induced voltage generated by the motor 4 is small and unstable, the embodiment obtains the output signal added with disturbance through the processing of the amplifying circuit, the rectifying circuit and the disturbing circuit so as to be really used for detection. To this end, the present embodiment provides a circuit diagram of signal processing of the cashbox door lock detecting device, as shown in fig. 4, wherein:
one, generator
The rotating speed of the rotating shaft 1 is properly amplified through the belt pulley 2 and the speed changer 3, so that the rotating speed of the rotating shaft 1 is within the range of rated power generation voltage at the rotating speed of 3 circles/second of the rotating shaft of the generator 4, and the condition that the rear-stage output is not over-voltage is ensured.
Second, amplifying circuit
The weak voltage signal output by the generator is amplified by a voltage amplifying element (MOSFET, etc.) to be stably detected. In order to ensure the detection and amplification capability of low voltage signals, the depletion type MOSFET is selected to amplify the voltage signals output by the generator, and the voltage output with the rotating speed ranging from zero to the set rotating speed is ensured to be in the amplification area of the amplification circuit, so that the rotating speed of the generator can be reliably identified.
It should be noted that the N-channel depletion type field effect transistor is adopted to amplify the voltage change, so that the detection sensitivity during stall or low rotation speed can be improved, and the field effect transistor is reasonably selected, so that the output voltage of the motor can be ensured to be within the rated input voltage range. In the embodiment, on one hand, the characteristic that the depletion type field effect transistor is conducted when 0 voltage is input is utilized, the voltage change can be stably amplified when the micro generator is static (when 0 voltage is output), and the zero-speed state and the low-speed state can be sensitively identified; on the other hand, the characteristic of high input resistance of the field effect transistor is utilized to enable the output end of the generator to be in an open circuit state, and reverse current or induced voltage is avoided. In addition, the value of R1 needs to be reasonably selected to ensure V DS Is positioned in a constant flow area;
third, rectifier circuit
Because the brush generator is selected, the output voltage is short and returns to zero instantly in the rotating process of the dial rotating shaft, and the LC filtering framework is selected, so that continuous voltage output can be realized. The measured fluctuation frequency is low, the load impedance is large, and the accurate shape keeping is not needed, so that the simple RC filter circuit is selected in the embodiment.
It should be noted that the capacitor may be selected from the category of non-temperature drift suppression type electrolytic capacitors, etc., and the temperature drift variation input and output are used to provide additional nonlinear effects.
Four, disturbance circuit
Before the voltage is detected at the voltage output end, a disturbance circuit can be added to enable the voltage to be compared with the output of the generator, nonlinear disturbance exists, and the capability of reversely deducing the rotation angle by using the output voltage is eliminated theoretically.
Considering that the disturbance signal generator is large in size and high in price, the embodiment combines with practical application scenes, and utilizes the working interval of the MOSFET and the parameter selection of the RC filter to realize the addition of disturbance to the output signal, namely the output signal added with the disturbance is obtained. The specific mode is as follows:
1. by selecting N-channel MOSFETs, R1, R2, U is guaranteed GS Voltage drop resistance R2 two-terminal V when equal to 0 R2 MOSFET pinch-off voltage V p The output voltage V when the generator reaches a set rotational speed (e.g., 360 DEG/sec) out The following conditions are met to ensure that the output is cut off when the generator reaches or exceeds a set rotating speed;
V p- V R2 ＝V out while satisfying the saturation V d ＝V out And is in the amplification zone.
At the moment, the rotating speed can be judged to reach more than one circle per second only through voltage, then the rotating speed enters a saturation area and a cut-off area, and the real rotating speed cannot be measured, so that integral reverse thrust of a rotating angle is effectively avoided;
using MOSFET input voltage V GS And an output current I D The nonlinear relation between the two is substituted into stable disturbance, so that the accurate measurement of the rotation angle is avoided;
2. the inherent nonlinear loss caused by the RC circuit in the rectification circuit is utilized, so that the possibility of accurately identifying the rotation angle through an integration method is fundamentally avoided
3. The direct current brush generator is adopted, and the possibility of accurately identifying the rotation angle through an integral method is fundamentally avoided through voltage change interference in the brush reversing process.
After obtaining the output signal added with the disturbance, performing signal analysis, specifically as follows:
1. and detecting a voltage signal between the voltage output end + and the voltage output end-, and confirming that the dial plate starts to rotate when the voltage change is detected.
2. According to the difference of the output voltages, i.e. (V) Output of -V At rest ) Specifically, the detected output voltage is compared with a voltage median value (namely a preset value), if the value of the output voltage is greater than the voltage median value, namely the output voltage difference is greater than zero, the dial is determined to rotate forwards, and if the value of the output voltage is less than the voltage median value, namely the output voltage difference is less than zero, the dial is determined to rotate backwards.
The voltage V at the time of the generator standstill state is described At rest The voltage median is the voltage median, the magnitude of the voltage median is related to the element parameters of the circuit where the generator is located, for example, the voltage median varies according to the difference of parameters such as a pull-up level, a voltage-dividing resistor, a depletion diode and a motor, and the calculation error is large, so the voltage median is generally determined through actual measurement after installation.
3. The rotating speed of the dial is estimated by utilizing the characteristic that the rotating speed of the generator is in direct proportion to the output voltage difference.
4. And identifying the rotation stopping state according to the output voltage, specifically, continuously monitoring the voltage change, and judging that the dial plate stops rotating once the voltage returns to zero.
5. Judging the compliance or violation, and if the detection data of the number of turns in the main system shows that the main system cannot completely rotate enough turns, zero resetting of the voltage is regarded as the violation of operation; and if the stop state occurs after the specified number of turns is reached, the operation compliance is considered.
In the embodiment, on the first hand, the existence of the electric brush is utilized to bring voltage jitter and instantaneous zero, so that the rotation angle estimation precision is reduced; in addition, when the generator reaches or exceeds a set rotating speed, the MOSFET is guaranteed to be cut off, so that the real rotating speed cannot be measured, and the integral reverse-pushing rotating angle is avoided; in the third aspect, the output of the MOSFET passes through a capacitor or an inductor in the rectifying circuit, so that voltage change delay and nonlinearity are increased, and accurate corner measurement is avoided. In addition, an A/D module can be added at the output end of the rectification circuit, voltage is discretely sampled through the A/D module, the sampling interval is set to be 100ms, certain integral error is brought, the precision of the reverse-thrust rotation angle is further reduced, and meanwhile effective estimation capacity is guaranteed.
Although the present invention has been described in detail, the present invention is not limited thereto, and those skilled in the art can modify the principle of the present invention, and thus, various modifications made in accordance with the principle of the present invention should be understood to fall within the scope of the present invention.
Claims (10)
1. A method for detecting a vault door lock is characterized by comprising the following steps:
along with the rotation of a dial of the safe door lock, a direct-current generator connected with a rotating shaft of the dial generates a voltage signal;
amplifying, rectifying and disturbing the voltage signal to obtain a disturbed output signal;
and analyzing the output signal added with the disturbance, and determining the rotation information of the cashbox door lock dial under the condition of avoiding obtaining the cashbox door lock password.
2. The method of claim 1, wherein the amplifying, rectifying, and perturbing the voltage signal to obtain a perturbed output signal comprises:
carrying out disturbance processing in the process of amplifying the voltage signal, and carrying out rectification processing on the obtained signal to obtain the output signal added with disturbance; wherein the performing of the perturbation process in the process of performing the amplification process on the voltage signal comprises: and adding stable disturbance based on the nonlinear relation between the input voltage and the output current of the N-channel depletion type MOSFET in the process of amplifying the voltage signal by using the N-channel depletion type MOSFET to obtain an amplified signal added with the stable disturbance.
3. The method of claim 1, wherein the amplifying, rectifying, and perturbing the voltage signal to obtain a perturbed output signal comprises:
amplifying the voltage signal to obtain an amplified signal, and performing disturbance processing in the process of rectifying the amplified signal to obtain the output signal added with disturbance; wherein, the performing disturbance processing in the process of rectifying the amplified signal to obtain the output signal added with disturbance comprises: and in the process of rectifying the amplified signal by using the RC filter circuit, adding nonlinear disturbance based on the inherent nonlinear loss of the RC filter circuit to obtain an output signal with increased nonlinearity as the output signal with added disturbance.
4. The method of claim 1, wherein the amplifying, rectifying, and perturbing the voltage signal to obtain a perturbed output signal comprises:
performing disturbance processing in the processes of sequentially performing amplification processing and rectification processing on the voltage signal to obtain the output signal added with disturbance; wherein, the process of sequentially amplifying and rectifying the voltage signals is disturbed, and the obtaining of the output signal added with disturbance comprises: adding stable disturbance based on the nonlinear relation between the input voltage and the output current of the N-channel depletion type MOSFET in the process of amplifying the voltage signal by using the N-channel depletion type MOSFET to obtain an amplified signal added with the stable disturbance; and in the process of rectifying the amplified signal added with the stable disturbance by using the RC filter circuit, adding the nonlinear disturbance based on the inherent nonlinear loss of the RC filter circuit to obtain the output signal added with the disturbance.
5. The method of claim 1, wherein the amplifying, rectifying, and perturbing the voltage signal to obtain a perturbed output signal comprises: after the voltage signal is sequentially subjected to amplification processing and rectification processing, then disturbance processing is carried out to obtain the output signal added with disturbance;
after the voltage signal is sequentially amplified and rectified, the voltage signal is disturbed to obtain the disturbed output signal, wherein the disturbed output signal comprises: amplifying the voltage signal by using an amplifying circuit to obtain an amplified signal; rectifying the amplified signal by using a rectifying circuit to obtain a rectified signal; and carrying out disturbance processing on the rectified signal by using a disturbance signal generator to obtain an output signal added with disturbance.
6. The method according to any of claims 1-5, wherein the direct current generator is a direct current brushed generator, and the voltage signal having voltage jitter and transient return-to-zero characteristics is generated accordingly based on voltage variations of brushes of the direct current brushed generator during commutation.
7. The method of claim 1, wherein the rotational information of the vault door lock dial includes a rotational direction, a rotational speed, and a rotational state of the vault door lock dial, and wherein analyzing the perturbed output signal and determining the rotational information of the vault door lock dial while avoiding acquiring the vault door lock password comprises:
determining an output voltage difference according to the voltage value of the output signal added with the disturbance and the known voltage value of the generator in a static state;
determining the rotation direction and the rotation state of the dial of the safe door lock according to the output voltage difference;
and determining the rotating speed of the cashbox door lock dial corresponding to the output voltage difference according to the known corresponding relation between the rotating speed of the direct current generator and the output voltage difference and the known corresponding relation between the rotating speed of the direct current generator and the rotating speed of the cashbox door lock dial.
8. The method of claim 7, further comprising:
determining the time of the cashbox door lock dial in a continuous rotation state from the beginning of rotation to the stop of rotation;
determining the number of turns of continuous rotation of the cashbox door lock dial according to the time of the cashbox door lock dial in a continuous rotation state and the rotation speed;
and determining the operation compliance or violation of the cashbox door lock dial according to the number of continuous rotating turns of the cashbox door lock dial.
9. A safe door lock detection device, characterized in that, the device includes:
the direct current generator is connected with a rotating shaft of the cashbox door lock dial and is used for generating a voltage signal along with the rotation of the cashbox door lock dial;
the signal processing module is used for amplifying, rectifying and disturbing the voltage signal to obtain an output signal added with disturbance;
and the door lock detection module is used for analyzing the output signal added with the disturbance and determining the rotation information of the cashbox door lock dial under the condition of avoiding obtaining the cashbox door lock password.
10. The apparatus of claim 9, wherein the door lock detection module is further configured to: determining the time of the cashbox door lock dial in a continuous rotation state from the beginning of rotation to the stop of rotation, determining the number of continuous rotation turns of the cashbox door lock dial according to the time of the cashbox door lock dial in the continuous rotation state and the rotation speed, and determining the operation compliance or violation of the cashbox door lock dial according to the number of continuous rotation turns of the cashbox door lock dial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210477843.5A CN114876287A (en) | 2022-04-29 | 2022-04-29 | Method and device for detecting vault door lock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210477843.5A CN114876287A (en) | 2022-04-29 | 2022-04-29 | Method and device for detecting vault door lock |
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| CN114876287A true CN114876287A (en) | 2022-08-09 |
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| CN202210477843.5A Pending CN114876287A (en) | 2022-04-29 | 2022-04-29 | Method and device for detecting vault door lock |
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Citations (4)
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|---|---|---|---|---|
| US5061923A (en) * | 1988-09-29 | 1991-10-29 | C & M Technology, Inc. | Computerized combination lock |
| CN101581181A (en) * | 2009-06-11 | 2009-11-18 | 胡中华 | Vault door wireless short message alarm system |
| CN201381737Y (en) * | 2009-03-04 | 2010-01-13 | 黄江 | Intelligent vault door |
| US20100180649A1 (en) * | 2009-01-20 | 2010-07-22 | Harvey Michael P | Self-powered electronic lock |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5061923A (en) * | 1988-09-29 | 1991-10-29 | C & M Technology, Inc. | Computerized combination lock |
| US20100180649A1 (en) * | 2009-01-20 | 2010-07-22 | Harvey Michael P | Self-powered electronic lock |
| CN201381737Y (en) * | 2009-03-04 | 2010-01-13 | 黄江 | Intelligent vault door |
| CN101581181A (en) * | 2009-06-11 | 2009-11-18 | 胡中华 | Vault door wireless short message alarm system |
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| 蔡立志 主编: "《大数据测评》", 上海科学技术出版社, pages: 164 * |
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