CN110609303B - Position sensor and safety chip based on position sensor - Google Patents
Position sensor and safety chip based on position sensor Download PDFInfo
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- CN110609303B CN110609303B CN201810612471.6A CN201810612471A CN110609303B CN 110609303 B CN110609303 B CN 110609303B CN 201810612471 A CN201810612471 A CN 201810612471A CN 110609303 B CN110609303 B CN 110609303B
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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
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Radar, Positioning & Navigation (AREA)
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Abstract
A position sensor comprises a satellite signal receiving unit, an alarm unit and a detection unit; the satellite signal receiving unit sends position information to the detecting unit; the detection unit receives the position information, detects the position information according to a preset position range, obtains a detection result, and sends the detection result to the alarm unit; and the alarm unit outputs a working state control signal according to the detection result, wherein the working state control signal is used for controlling the working state of the safety chip where the position sensor is positioned. Therefore, the working state of the security chip where the position sensor is located can be used for judging whether the position information is attacked or not.
Description
Technical Field
The present disclosure relates to the field of information security technologies, and in particular, to a position sensor and a security chip based on the position sensor.
Background
With the development of the Internet of things technology, the Internet of things becomes a trend, and the Internet of things greatly improves the production efficiency, thereby bringing great convenience to the production and life of people. With the wide application of the internet of things in the aspects of national infrastructure, industrial production, natural resources, intelligent home, intelligent driving, security and the like, the information security has risen to the national level, and the security chip has software incomparable attack resistance and becomes a core component of security protection.
The existing sensors in the prior art can sense external environment information such as temperature, voltage, frequency and the like to determine whether the equipment is attacked by the temperature, the voltage, the frequency and the like, but cannot judge whether the equipment position is attacked.
Disclosure of Invention
Based on this, it is necessary to provide a position sensor and a position sensor-based security chip for solving the problem that the conventional sensor cannot determine whether the device position is attacked.
A position sensor comprises a satellite signal receiving unit, an alarm unit and a detection unit;
the satellite signal receiving unit sends position information to the detecting unit; the detection unit receives the position information, detects the position information according to a preset position range, obtains a detection result, and sends the detection result to the alarm unit; and the alarm unit outputs a working state control signal according to the detection result, wherein the working state control signal is used for controlling the working state of the safety chip where the position sensor is positioned.
In one embodiment, the detection unit comprises a self-test unit; the position information comprises first preset position information and second preset position information, the first preset position information is in the preset position range, and the second preset position information is out of the preset position range;
when the self-checking unit receives the first preset position information, a first self-checking result is obtained according to a first working state of the alarm unit when the alarm unit is in the first preset position information; when the self-checking unit receives the second preset position information, a second self-checking result is obtained according to a second working state of the alarm unit when the alarm unit is in the second preset position information; the self-checking unit determines a first detection result according to the first self-checking result and the second self-checking result; the detection result includes the first detection result.
In one embodiment, when the first self-checking result and the second self-checking result are both passed, the self-checking unit determines that the first checking result is that the position sensor works normally; when any one of the first self-checking result and the second self-checking result is failed, determining that the first checking result is abnormal in operation of the position sensor;
when the working state control signal of the first working state is a first working state control signal, a first self-checking result is passed; and when the working state control signal of the second working state is the second working state control signal, the second self-checking result is passed.
In one embodiment, the alarm unit outputs a second working state control signal when the first detection result is abnormal.
In one embodiment, the second working state control signal is an interrupt signal or a reset signal.
In one embodiment, the detection unit includes: a real-time detection unit; the position information comprises real-time position information of the position sensor determined by the satellite signal receiving unit;
the real-time detection unit detects the position relation between the real-time position information and the preset position range when receiving the real-time position information, and a second detection result is obtained; the detection result includes the second detection result.
In one embodiment, the real-time detection unit determines that the second detection result is normal when the real-time position information is within the preset position range;
and when the real-time position information is out of the preset position range, the real-time detection unit determines that the second detection result is abnormal.
In one embodiment, the alarm unit outputs a second working state control signal when the second detection result is abnormal.
In one embodiment, a security chip based on a position sensor is further provided, and the security chip comprises a central processing unit and the position sensor, wherein the central processing unit is connected with the alarm unit, and the alarm unit controls the working state of the central processing unit.
In one embodiment, the location sensor based security chip further includes a reset unit, a storage unit for storing data, a communication interface unit for connecting devices, a security algorithm unit for performing security operations, a temperature sensor for detecting temperature, a voltage sensor for detecting voltage, a frequency sensor for detecting frequency, and a time sensor for detecting time;
the reset unit receives the reset signal generated by the alarm unit and controls whether the central processing unit is in a reset state.
The position sensor and the safety chip based on the position sensor comprise a satellite signal receiving unit, an alarm unit and a detection unit, wherein the detection unit acquires position information through the satellite signal receiving unit, detects the position information according to a preset position range, acquires a detection result, sends the detection result to the alarm unit, and generates a working state control signal according to the detection result to further control the working state of the safety chip where the position sensor is located. Therefore, the working state of the security chip where the position sensor is located can be used for judging whether the position information is attacked or not.
Drawings
FIG. 1 is a schematic diagram of a position sensor in one embodiment;
FIG. 2 is a schematic diagram of a position sensor in another embodiment;
FIG. 3 is a schematic diagram illustrating a relationship between a preset position range and a device in one embodiment;
FIG. 4 is a schematic diagram of the structure of a position sensor based security chip in one embodiment;
FIG. 5 is a schematic diagram of a position sensor based security chip according to another embodiment;
FIG. 6 is a schematic diagram illustrating the operation steps of a security chip according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The present application provides a position sensor, as shown in fig. 1, which includes a satellite signal receiving unit 110, a detecting unit 120, and an alarm unit 130.
The satellite signal receiving unit 110 transmits the position information to the detecting unit 120.
The detection unit 120 receives the position information, detects the position information according to a preset position range, obtains a detection result, and sends the detection result to the alarm unit.
The alarm unit 130 outputs a working state control signal according to the detection result, where the working state control signal is used to control the working state of the security chip where the position sensor is located.
The preset position range may be preset according to actual situations, and in a specific embodiment, the position range may be a latitude and longitude range.
In one embodiment, the detection unit 120 includes a self-checking unit and a real-time detection unit, where the self-checking unit is configured to perform self-checking on the sensor, and detect whether the position sensor is attacked; the real-time detection unit is used for detecting the position of equipment connected with the safety chip where the sensor is located, and detecting whether the position information of the equipment is attacked.
The satellite signal receiving unit sends position information to the detecting unit, the detecting unit detects the position information to obtain a detection result, and the obtained detection result is sent to the alarm unit. The alarm unit generates corresponding working state control signals according to the detection result, and different working state control information is used for controlling the working state of the safety chip where the position sensor is located.
The position sensor comprises a satellite signal receiving unit, an alarm unit and a detection unit, wherein the detection unit acquires position information through the satellite signal receiving unit, detects the position information according to a preset position range, obtains a detection result, sends the detection result to the alarm unit, and generates a working state control signal according to the detection result to further control the working state of a safety chip where the position sensor is located. Therefore, the working state of the security chip where the position sensor is located can be used for judging whether the position information is attacked or not.
In one embodiment, as shown in FIG. 2, the detection unit includes a self-test unit 210; in this embodiment, the position information sent by the satellite signal receiving unit is two preset position points, which are used for performing self-checking on the position sensor, and the position information includes first preset position information and second preset position information. The first preset position information is located in the preset position range, and the second preset position information is located outside the preset position range. In practical situations, it is only required that one of the two position points is within a preset position range, and the other is not within the preset range, in this embodiment, the position point within the preset position range is marked as first preset position information, and the position point outside the preset position range is marked as second preset position information.
In this embodiment, the process of detecting the position information is referred to as a self-checking process, i.e., detecting whether the position sensor can normally operate.
In one embodiment, when receiving the first preset position information, the self-checking unit 210 obtains a first self-checking result according to a first working state of the alarm unit when the alarm unit is in the first preset position information; when the self-checking unit receives the second preset position information, a second self-checking result is obtained according to a second working state of the alarm unit when the alarm unit is in the second preset position information; the self-checking unit determines a first detection result according to the first self-checking result and the second self-checking result; the detection result includes the first detection result.
When the self-checking unit receives that the position information from the satellite signal receiving unit is the first preset position information, the alarm unit is in a working state, and the working state is recorded as the first working state of the alarm unit when the first preset position information is received. When the self-checking unit receives that the position information from the satellite signal receiving unit is the second preset position information, the alarm unit is in another working state, and the other working state is recorded as the second working state of the alarm unit when the alarm unit is in the second preset position information.
Further, the first detection result is a detection result obtained after the self-checking unit judges whether the position sensor works normally or not under the preset position information.
In one embodiment, when the first self-checking result and the second self-checking result are both passed, the self-checking unit determines that the first checking result is that the position sensor works normally; and when any one of the first self-checking result and the second self-checking result is failed, determining that the first checking result is abnormal in operation of the position sensor.
In one embodiment, the first preset position information is a position point within a preset position range, and the normal working state of the alarm unit should be a non-alarm state. In one embodiment, the second preset position information is a position point outside the preset position range, and the normal working state of the alarm unit should be an alarm state.
In this embodiment, if the first working state of the alarm unit in the first preset position information is not the alarm state, and the second working state of the alarm unit in the second preset position information is the alarm state, the position sensor is considered to work normally.
Further, if the first working state of the alarm unit when the first preset position information is the alarm state or the second working state of the alarm unit when the second preset position information is the non-alarm state, the abnormal working of the position sensor is determined.
In one embodiment, when the working state control signal of the first working state is a first working state control signal, a first self-checking result is passed; and when the working state control signal of the second working state is the second working state control signal, the second self-checking result is passed.
In one embodiment, the first working state control signal is a release reset signal, and is used for controlling the position sensor to end the reset state, i.e. the alarm unit does not alarm; the second working state control signal is a reset signal or an interrupt signal and is used for controlling the position sensor to enter a reset state or an interrupt state and is used for controlling the position sensor to temporarily stop working, namely the alarm unit alarms.
Further, if the working state control signal of the first working state is a release reset signal, the alarm unit works normally when judging the first preset position information, namely the first self-check passes. When the working state control signal of the second working state is a reset signal or an interrupt signal, the warning unit works normally when judging the second preset position information, namely the second self-checking passes. If the two self-checking results are passed at the same time, the position sensor is considered to be capable of working normally, and the obtained first checking result is normal. If any one of the two self-detection results is failed, the position sensor is considered to be incapable of working normally, and the obtained first detection result is abnormal.
In one embodiment, the alarm unit outputs a second working state control signal when the first detection result is abnormal.
In this embodiment, the self-checking process of the self-checking unit is ended, and a first detection result is obtained. The first detection result represents the final result of one self-detection; the first detection result is abnormal, namely the position sensor fails to pass the self-checking, and the alarm unit outputs a second working state control signal to control the position sensor to stop working temporarily. In one embodiment, the second operation state control signal is an interrupt signal or a reset signal.
In one embodiment, the obtained first detection result is normal, i.e. the position sensor passes the self-check, the alarm unit outputs a first operation state control signal (i.e. controls the position sensor to start operating), or the position sensor passes the self-check, and the alarm unit does not output an alarm signal (i.e. controls the position sensor to keep operating).
In one embodiment, self-tests include power-on self-tests and real-time self-tests during operation. In one embodiment, the alarm unit outputs the second working state control signal when the first detection result is abnormal after the power-on self-test and the self-test of the real-time self-test in the working process are finished. When the first detection result is normal after the power-on self-detection is finished, the alarm unit outputs a first working state control signal; after the self-checking is finished in the working process, the alarm unit does not output an alarm signal, and the position sensor is controlled to keep the working state.
In one embodiment, as shown in FIG. 2, the detection unit includes a real-time detection unit 220. In this embodiment, the position information includes real-time position information where the position sensor determined by the satellite signal receiving unit is located.
In this embodiment, the real-time position information of the position sensor, that is, the real-time position information of the device connected to the security chip where the position sensor is located. The real-time detection unit detects the real-time position of the equipment and judges whether the position of the equipment accords with the preset range of the position of the equipment. The preset range for the equipment position is a preset position range.
The real-time position information is position information obtained by receiving a satellite signal from a satellite signal receiving unit and analyzing the satellite signal. In one particular embodiment, the position sensor may acquire position via a navigation system satellite such as GPS, beidou, geronus (GLONASS), galileo (GALILEO), or the like.
The real-time detection unit 220 detects the position relationship between the real-time position information and the preset position range when receiving the real-time position information sent by the satellite signal receiving unit, and obtains a second detection result; the detection result includes the second detection result.
In this embodiment, when the position information received by the real-time detection unit is real-time position information, the position information is detected by the position sensor in the working process by the device connected to the chip where the sensor is located. The second detection result is obtained by judging whether the real-time position is attacked by the real-time detection unit.
In one embodiment, the real-time detection unit 220 determines that the second detection result is normal when the real-time position information is within the preset position range; the real-time detection unit 220 determines that the second detection result is abnormal when the real-time position information is outside the preset position range.
In one embodiment, the alarm unit generates a second working state control signal when the second detection result is abnormal.
In this embodiment, if the real-time position information is detected to be outside the preset position range, it is determined that the real-time position information does not conform to the allowable movement range preset for the position of the device, and the second detection result determined by the real-time detection unit is abnormal, that is, the alarm unit generates alarm information, and the safety chip where the position sensor is located is controlled to stop working, where the alarm information may be an interrupt signal or a reset signal. Similarly, if the real-time position information is detected to be in the preset position range, the real-time position information is determined to be in accordance with the preset allowable movement range of the equipment position, and the second detection result determined by the real-time detection unit is normal, so that the alarm unit does not generate an alarm signal, and the safety chip where the position sensor is located keeps a normal working state.
The position sensor designed by receiving the navigation satellite signals enables the sensor to accurately acquire the position information of the equipment, and has non-forgery. The position sensor has the characteristics of non-bypass and non-falsification because the position sensor has the functions of power-on self-detection and real-time detection.
In a specific embodiment, as shown in fig. 3, a schematic diagram of a relationship between a preset position range and a device in which a preset range is set for the device in this embodiment is shown. Firstly, the latitude and longitude range (shown by a dotted line box in the figure) where the mobile equipment can be allowed to move is set, the mobile equipment is monitored in real time by a safety chip containing the position sensor, and an alarm mechanism is started once the real-time position information of the equipment is detected to be out of the set range, and an alarm unit generates corresponding alarm signals, for example, the equipment is forbidden or limited to work, and the alarm signals are sent to a background management system.
In one embodiment, as shown in fig. 4, the present application further provides a security chip based on a position sensor, which includes a central processing unit 410 (CPU) and the position sensor 420, where the central processing unit is connected to the alarm unit, and the alarm unit controls the working state of the central processing unit.
In one embodiment, as shown in fig. 5, the location sensor based security chip further includes a reset unit 510, a storage unit 520 for storing data, other sensors 540, a security algorithm unit 550 for performing security operations, and a communication interface unit 530 for connecting devices. In one embodiment, the other sensors 540 may include: a temperature sensor for detecting temperature, a voltage sensor for detecting voltage, a frequency sensor for detecting frequency, and a time sensor for detecting time. In other embodiments, the security chip may also include other security sensors.
The reset unit 510 receives the reset signal generated by the alarm unit and controls whether the central processing unit is in a reset state.
The other sensors are respectively connected with the central processing unit, and the working state of the central processing unit can be controlled by the detection results of the sensors.
The position sensor has the safety characteristics of non-bypass property, self-checking property, resistance to unsealing, probe detection and the like, and is combined with the traditional chip safety technology, so that the designed safety chip with the position sensor can cope with hacking against the position, and the safety of mobile equipment is ensured.
In one embodiment, a range allowing the device to move is preset inside the security chip before the device loaded with the security chip leaves the factory, and in one embodiment, the range allowing the device to move is longitude and latitude information. The first longitude and latitude information and the second longitude and latitude information are respectively in and out of a range of a preset permission device to move.
In one embodiment, the working steps of the security chip are as shown in fig. 6, and the steps include the following steps:
step S1: the chip is powered on to perform position sensor self-checking firstly:
1) The navigation satellite receiving unit sends preset first fixed longitude and latitude information to the self-checking unit, wherein the first fixed longitude and latitude information is in a preset range. When the self-checking unit receives the first longitude and latitude information, if the alarm unit does not alarm, the first step self-checking passes;
2) The navigation satellite receiving unit sends preset second fixed longitude and latitude information to the self-checking unit, wherein the second fixed longitude and latitude information is not in a preset range. When the self-checking unit receives the second longitude and latitude information, if the alarm unit alarms, the second step self-checking passes;
3) The self-checking unit performs merging judgment on the self-checking results of the first step and the second step, and sends the final self-checking result to the safety alarm unit, and if the self-checking of the first step and the self-checking of the second step are passed, the self-checking is considered to pass, otherwise, the self-checking is not passed;
4) If the self-checking passes, the safety alarm unit releases a reset signal; if the self-test is not passed, the position sensor is considered to be attacked, the reset signal is valid, and the chip is always in a reset state;
step S2: the other safety sensors perform self-checking, if the self-checking is passed, the CPU is started, otherwise, the chip is in a reset state; wherein, other security sensor self-tests can be performed in parallel or in series with the position sensor self-test.
Step S3: after the chip works normally, namely the CPU is started, the real-time detection unit monitors the position information of the current equipment in real time and transmits the result to the alarm unit;
step S4: if the real-time position information exceeds the preset latitude and longitude range, the alarm unit sends alarm information; the user can set the alarm information as interrupt or reset according to the actual situation, and the CPU processes the alarm interrupt or forces the chip to be in a reset state, so that information leakage is avoided;
step S5: and in the normal working process of the security chip, a self-checking instruction can be sent by the CPU irregularly, the position sensor is subjected to self-checking to confirm whether the position sensor receives attack or not, a self-checking result is sent to the security alarm unit, and the step of the self-checking process is the same as the step of powering on the self-checking in the step S1.
Step S6: the safety alarm sends out an alarm signal in an interrupt or reset mode.
The safety chip based on the position sensor comprises the position sensor and can sense the position information of the mobile equipment. The position sensor comprises a satellite signal receiving unit, an alarm unit and a detection unit, wherein the detection unit acquires position information through the satellite signal receiving unit, detects the position information according to a preset position range, obtains a detection result, sends the detection result to the alarm unit, and generates a working state control signal according to the detection result to further control the working state of a safety chip where the position sensor is located. Therefore, the working state of the security chip can be used for judging whether the equipment position information of the security chip is attacked or not.
The safety chip based on the position sensor can solve the safety requirement of the mobile device on the position information, and in a specific embodiment, the practical application can protect the allowable movement range of the device by setting an electronic fence or ensure that a moving object moves within a limited range. In addition, the position sensor acquires the position by receiving satellite signals, so that the reliability and the non-counterfeitability of the position information are ensured; meanwhile, the position sensor has the functions of power-on self-detection and implementation detection, so that the position sensor has the security characteristics of incapability of bypass, attack prevention, real-time detection and the like, can perform real-time effective position protection on the mobile equipment, can cope with hacking aiming at the position, and ensures the position security of the mobile networking equipment.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. The position sensor is characterized by comprising a satellite signal receiving unit, an alarm unit and a detection unit;
the satellite signal receiving unit sends position information to the detecting unit; the detection unit receives the position information, detects the position information according to a preset position range, obtains a detection result, and sends the detection result to the alarm unit; the alarm unit outputs a working state control signal according to the detection result, wherein the working state control signal is used for controlling the working state of the safety chip where the position sensor is positioned;
the detection unit comprises a self-detection unit; the position information comprises first preset position information and second preset position information, the first preset position information is in the preset position range, and the second preset position information is out of the preset position range; when the self-checking unit receives the first preset position information, a first self-checking result is obtained according to a first working state of the alarm unit when the alarm unit is in the first preset position information; when the self-checking unit receives the second preset position information, a second self-checking result is obtained according to a second working state of the alarm unit when the alarm unit is in the second preset position information; the self-checking unit determines a first detection result according to the first self-checking result and the second self-checking result; the detection result includes the first detection result.
2. The position sensor of claim 1, wherein:
when the first self-checking result and the second self-checking result are both passed, the self-checking unit determines that the first detection result is that the position sensor works normally; when any one of the first self-checking result and the second self-checking result is failed, determining that the first checking result is abnormal in operation of the position sensor;
when the working state control signal of the first working state is a first working state control signal, a first self-checking result is passed; and when the working state control signal of the second working state is the second working state control signal, the second self-checking result is passed.
3. The position sensor of claim 2, wherein: and the alarm unit outputs a second working state control signal when the first detection result is abnormal.
4. A position sensor according to claim 3, wherein the second operating state control signal is an interrupt signal or a reset signal.
5. The position sensor according to any one of claims 1 to 4, wherein the detection unit includes: a real-time detection unit; the position information comprises real-time position information of the position sensor determined by the satellite signal receiving unit;
the real-time detection unit detects the position relation between the real-time position information and the preset position range when receiving the real-time position information, and a second detection result is obtained; the detection result includes the second detection result.
6. The position sensor of claim 5, wherein:
when the real-time position information is in the preset position range, the real-time detection unit determines that a second detection result is normal;
and when the real-time position information is out of the preset position range, the real-time detection unit determines that the second detection result is abnormal.
7. The position sensor of claim 6, wherein the alarm unit outputs a second operation state control signal when the second detection result is abnormal.
8. The position sensor of claim 1, wherein the predetermined position range comprises a latitude and longitude range.
9. A position sensor based security chip comprising a central processor and a position sensor according to any one of claims 1 to 8, the central processor being connected to the alarm unit, the alarm unit controlling the operating state of the central processor.
10. The position sensor-based security chip according to claim 9, further comprising a reset unit, a storage unit for storing data, a communication interface unit for connecting devices, a security algorithm unit for performing security operations, a temperature sensor for detecting temperature, a voltage sensor for detecting voltage, a frequency sensor for detecting frequency, and a time sensor for detecting time;
the reset unit receives the reset signal generated by the alarm unit and controls whether the central processing unit is in a reset state.
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| CN110609303A (en) | 2019-12-24 |
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