CN220819025U

CN220819025U - Device capable of detecting disassembly of notebook

Info

Publication number: CN220819025U
Application number: CN202322783199.7U
Authority: CN
Inventors: 刘媛媛; 广晖; 潘林; 谢自英; 代启龙
Original assignee: LCFC Hefei Electronics Technology Co Ltd
Current assignee: LCFC Hefei Electronics Technology Co Ltd
Priority date: 2023-10-17
Filing date: 2023-10-17
Publication date: 2024-04-19
Anticipated expiration: 2033-10-17

Abstract

The utility model provides a device capable of detecting the disassembly of a notebook, which comprises: the sensor is arranged in the accommodating space of the notebook; the triggering device is arranged on the inner side of the rear cover of the notebook and is opposite to the sensor; an embedded controller electrically connected to the sensor; in a state that the triggering device triggers the sensor, the sensor transmits a parameter value to the embedded controller, and the embedded controller judges and determines whether the rear cover is detached or not based on a ratio between the parameter value and a preset value; according to the device capable of detecting the disassembly of the notebook computer, disclosed by the embodiment of the utility model, as the sensor has higher measurement precision, the sensor is triggered by the triggering device, so that the detection accuracy can be effectively improved.

Description

Device capable of detecting disassembly of notebook

Technical Field

The utility model belongs to the technical field of electronic equipment, and particularly relates to a device capable of detecting the disassembly of a notebook.

Background

Notebook computers are becoming an indispensable tool in life and work of people due to their advantages of high performance, high portability, and the like. Notebook computers are typically assembled from a variety of electronic and structural devices, whether electronic or structural, that a user may experience after a period of use. In order to improve user experience, notebook computer manufacturers can provide quality guarantee period, and quality guarantee is bad in normal use process of users.

Because the warranty is free maintenance, whether the bad notebook computer is caused by the private disassembly of the terminal user needs to be detected and eliminated, if the bad notebook computer belongs to the private disassembly of the user, the bad notebook computer is not in the warranty range, and under the premise, if the client still needs to maintain the notebook computer, the manufacturer needs to collect certain maintenance cost. If the manufacturer cannot effectively detect the reasons for causing the bad occurrence of the notebook computer, the maintenance cost of the notebook manufacturer is greatly improved, so that the detection of whether the terminal user disassembles the computer privately is very necessary, the maintenance cost of the notebook manufacturer can be reduced, after-sale disputes can be avoided, and the customer experience is improved.

The current method for detecting whether a user secretly dismantles a notebook is to integrate a trigger switch on a notebook motherboard, for example, when the motherboard is not assembled in the notebook, the switch is in an open-close state, and after the motherboard is assembled in the notebook, a notebook back cover is tightly combined with the motherboard to form a certain pressure to press a switch push handle, so that the switch is in a closed state. After a client privately unpacks the notebook, the pushing handle loses the pressure of the rear cover and then bounces off, so that the switch is changed into an open-close state from a closed state, and then the change of the switch state is known through the detection of the switch voltage by the main board of the notebook, so that whether a user unpacks the notebook in an unauthorized state is known, whether the defect of the notebook belongs to a quality assurance range is judged, and a corresponding maintenance mode is adopted.

The above-described manner of determining whether to privately disassemble a notebook has the following drawbacks,

1. The push-down stroke interval of the push handle of the human trigger switch is small, the inherent assembly tolerance of the rear cover structural member is relatively large, and once the push-down stroke of the push handle is insufficient or is overlarge, the push handle cannot effectively spring up, so that the rear cover cannot be effectively detected.

2. The trigger switch pushing handle is usually a plastic part, has insufficient strength, is easy to break or damage due to stress when impacted, is quite common in the production process, and has the problem of easy damage due to the switch pushing handle, and the yield and the production efficiency of a production line are also affected.

3. When the user is not subjective, the notebook rear cover is tilted, the switch is also tilted, the rear cover is triggered to detect, misjudgment is caused, and further after-sales disputes are caused.

Disclosure of utility model

In view of the above-mentioned problems in the prior art, the present utility model provides a device for detecting the disassembly of a notebook computer, which has a simple structure, is easy to assemble, and can accurately determine whether the disassembly exists.

In order to achieve the above purpose, the technical scheme adopted by the embodiment of the utility model is as follows:

Provided is a device capable of detecting the disassembly of a notebook, comprising: the sensor is arranged in the accommodating space of the notebook; the triggering device is arranged on the inner side of the rear cover of the notebook and is opposite to the sensor; an embedded controller electrically connected to the sensor; and in the state that the triggering device triggers the sensor, the sensor transmits the parameter value to the embedded controller, and the embedded controller judges and determines whether the rear cover is detached or not based on the ratio between the parameter value and a preset value.

In some embodiments of the present utility model, the sensor is disposed on the main board, and is located in the accommodating space enclosed by the front cover and the rear cover together with the main board.

In some embodiments of the utility model, the sensor is configured as a south pole responsive hall sensor.

In some embodiments of the utility model, the triggering device is configured as a magnet; the magnet and the rear cover form fixed connection in a buckling mode, or the magnet is arranged in the rear cover.

In some embodiments of the present utility model, the input end of the south pole response hall sensor is electrically connected with an input power supply through a first resistor, and the south pole response hall sensor is connected in parallel with a first capacitor and is grounded through the first capacitor; the first resistor is connected with the first capacitor in parallel and forms a filtering unit of the south pole response Hall sensor input end; the output end of the south pole response Hall sensor is electrically connected with a second resistor and is electrically connected with an input power supply through the second resistor, the south pole response Hall sensor is connected with a second capacitor in parallel, the second capacitor is grounded, and the output end of the south pole response Hall sensor is filtered through the second capacitor; and the south pole response Hall sensor is electrically connected with the embedded controller.

In some embodiments of the utility model, the magnet is coated with a galvanized iron sheet on a surface of a side thereof facing the rear cover.

In some embodiments of the utility model, the sensor is provided with a pressure sensitive sensor; the pressure-sensitive sensor includes: piezoresistive pressure-sensitive sensor, piezoelectric pressure-sensitive sensor or capacitive pressure-sensitive sensor.

In some embodiments of the utility model, the triggering device is configured as a boss; the boss is attached to the pressure-sensitive sensor.

In some embodiments of the present utility model, the pressure-sensitive sensor is composed of a third resistor, a fourth resistor, a fifth resistor, and a sixth resistor which are sequentially electrically connected and made by the piezoresistive effect of the monocrystalline silicon material; the pressure-sensitive sensor is integrated with a temperature compensation circuit and a differential amplifier, wherein one ends of the third resistor and the sixth resistor are electrically connected with the temperature compensation circuit; and the other ends of the third resistor, the sixth resistor and the fourth resistor and one end of the fifth resistor are electrically connected with the differential amplifier.

In some embodiments of the utility model, the pressure sensitive sensor is electrically connected to the embedded controller through an output of the differential amplifier.

Compared with the prior art, the utility model has the beneficial effects that:

According to the device for detecting the disassembly of the notebook, disclosed by the embodiment of the utility model, the triggering device and the sensor cooperate, and the sensor has the characteristic of high measurement precision, so that the problem that whether a user secretly disassembles the notebook can be effectively solved, and the maintenance cost of a notebook manufacturer is reduced; meanwhile, the sensor has the characteristic of miniaturization, is not easy to damage, and further can effectively improve the yield and the production efficiency of the production line.

Drawings

In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings illustrate various embodiments by way of example in general and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive of the present apparatus or method.

FIG. 1 is a schematic diagram of a device for detecting the detachment of a notebook according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a Hall switch of a device for detecting the detachment of a notebook according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a Hall sensor according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram illustrating the operation of a Hall switch according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a pressure sensor module of a device for detecting the removal of a notebook computer according to an embodiment of the present utility model.

Description of the reference numerals

1-A sensor; 11-south pole response hall sensor; 12-piezoresistive pressure-sensitive sensors;

2-triggering means; 3-a main board; 4-a rear cover;

An EC-embedded controller; r _V -a first resistor; r _L -a second resistor; c _P -a first capacitance;

C _L -a second capacitance; VCC-input power; GND-ground; v _OUT -output voltage;

I-bias current; b-magnetic field strength; u _H -output voltage;

V _OL -low; v _OH -high; a Bop-operating point; brp-release point;

r1-a third resistor; r2-fourth resistor; r3-fifth resistor; r4-sixth resistance.

Detailed Description

Hereinafter, specific embodiments of the present utility model will be described in detail with reference to the accompanying drawings, but not limiting the utility model. In order to better understand the technical solutions of the present disclosure, the following detailed description of the present disclosure is provided with reference to the accompanying drawings and the specific embodiments. Embodiments of the present disclosure will be described in further detail below with reference to the drawings and specific embodiments, but not by way of limitation of the present disclosure.

All terms (including technical or scientific terms) used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In order to reduce the maintenance cost of the notebook computer after sale, manufacturers producing notebook computers generally need to adopt effective detection means to judge the real cause of the abnormality of the notebook computer, but the existing technical means cannot realize accurate judgment results, so the utility model provides the following solution.

Referring to fig. 1, the present utility model provides a device for detecting the disassembly of a notebook, comprising: the sensor 1 is arranged in the accommodating space of the notebook; the triggering device 2 is arranged on the inner side of the rear cover 4 of the notebook and is opposite to the sensor 1; an embedded controller EC electrically connected to the sensor 1; in a state in which the triggering device 2 triggers the sensor 1, the sensor 1 transmits the parameter value to the embedded controller EC, and the embedded controller EC judges and determines whether the rear cover 4 is detached based on a ratio between the parameter value and a preset value. In this embodiment, since the sensor 1 has the characteristic of high measurement accuracy and is miniaturized, not only the accuracy of judging whether the notebook computer is disassembled or not can be improved, but also the production efficiency can be improved.

Further, the sensor 1 is disposed on the main board 3, and is located in the accommodating space enclosed by the front cover and the rear cover 4 together with the main board 3.

In the first embodiment of the present utility model, the sensor 1 is arranged as a south pole responsive hall sensor 11. The triggering device 2 is configured as a magnet; the magnet is fixedly connected with the rear cover 4 in a buckling manner, or is built in the rear cover 4. The south pole is spaced from the magnet in response to the hall sensor 11.

In the first embodiment, the south pole response hall sensor 11 has the characteristics of high sensitivity, high response speed, high precision and good reliability, and can accurately measure tiny magnetic field intensity change in an electromagnetic environment with the characteristic of high sensitivity and perform quick response to the magnetic field intensity change, so that in the embodiment, once the notebook computer is subjected to private disassembly, the south pole response hall sensor 11 can quickly respond, acquire related data information and perform analysis and judgment on the basis; erroneous judgment can be avoided by setting a variation interval of the magnetic field intensity. The magnet can be correspondingly arranged according to the actual application scene, in order to prevent the magnet from influencing the outside of the notebook computer, in the embodiment, a galvanized iron sheet is coated on the surface of one side of the magnet facing the rear cover 4, and the galvanized iron sheet is used for shielding radiation of magnetic force lines to the outside.

Further, referring to fig. 2, fig. 2 is a schematic diagram of a hall switch of a device capable of detecting detachment of a notebook computer according to an embodiment of the present utility model, in a first embodiment, a south pole is electrically connected to an input power VCC through a first resistor R _V in response to an input terminal of a hall sensor 11, and the south pole is connected in parallel to a first capacitor C _P in response to the hall sensor 11 and is grounded to a ground GND through a first capacitor C _P; the first resistor R _V is connected in parallel with the first capacitor C _P and forms a filter unit RC of the south pole response Hall sensor 11 input end so as to reduce line interference through filtering; the output end of the south pole response Hall sensor 11 is electrically connected with a second resistor R _L and is electrically connected with an input power supply VCC through a second resistor R _L, the south pole response Hall sensor 11 is connected with a second capacitor C _L in parallel, the ground wire GND is grounded through a second capacitor C _L, and the output end of the south pole response Hall sensor 11 is filtered through a second capacitor C _L; the south pole response hall sensor 11 is electrically connected to the embedded controller EC.

The working principle of the south pole response hall sensor 11 of the first embodiment is also briefly described here.

Referring to fig. 3, fig. 3 is a schematic diagram of a hall sensor, where I represents a bias current of the hall sensor, B represents a magnetic field strength, and U _H represents an output voltage of the hall sensor.

In the first embodiment, when the hall sensor is set to have the south pole responsive hall sensor 11 and the bias current I is a constant value, the output voltage U _H of the south pole responsive hall sensor 11 depends on the magnitude of the magnetic field strength B, which depends on the distance between the magnet on the notebook back cover 4 and the south pole responsive hall sensor 11, and the smaller the distance, the larger the magnetic field strength B; conversely, the greater the distance, the smaller the magnetic field strength B.

Referring to fig. 4, fig. 4 is a schematic diagram of the operation of the hall switch. When the magnetic field strength B is larger than or equal to the magnetic field strength of the working point Bop, namely, the distance L between the magnet and the south pole responding to the Hall sensor 11 is smaller than or equal to Lrp, wherein Lrp is expressed as the length of the magnet from the south pole responding to the release point Brp of the Hall sensor 11, at the moment, a low level V _OL is output, and the output voltage is kept unchanged; when the magnetic field intensity B is smaller than or equal to the magnetic field intensity of the release point Brp, namely, the distance L between the magnet and the south pole responding to the Hall sensor 11 is larger than or equal to Lop, wherein Lop is expressed as the length of the magnet from the south pole responding to the working point Bop of the Hall sensor 11, and at the moment, a high level V _OH is output; that is, when the north pole is close to the hall switch, l+.lrp, output low level V _OL; when the north pole is far away from the Hall switch, L is more than or equal to Lop, and a high level V _OH is output; when Lop < L < Lrp, the level V ₁ and V _OL＜V₁＜V_OH are output.

An explanation of the operation point Bop and the release point Brp in the embodiment of the present utility model is described as follows:

The operating point Bop refers to a critical point at which the hall switch changes from the no-magnetic-field state to the magnetic-field state, and the magnetic field strength gradually increases, and the hall switch changes from the no-output state to the output state. Correspondingly, the release point Brp refers to a critical point at which the hall switch is turned from the output state to the no-output state in the process that the magnetic field intensity of the hall switch is gradually reduced from the magnetic field state to the no-magnetic field state.

With continued reference to fig. 2, in the first embodiment of the present utility model, the first resistor R _V and the first capacitor C _P form a filtering unit RC connected to the interface of the hall switch input power VCC, and the output voltage V _OUT is pulled up through the second resistor R _L and filtered through the second capacitor C _L to reduce line interference. The output voltage V _OUT is input to a GPIO interface (general purpose input output interface) of the embedded controller EC for detecting a change in the output voltage V _OUT, thereby detecting whether the notebook back cover 4 is opened.

In order to determine the change of the voltage V _OUT, record the voltage value of the output voltage V _OUT, in the first embodiment, a counter T is set in the embedded controller EC, and detect the change of the voltage value of the output voltage V _OUT, that is, when V _OUT＝V_OH, the counter t+1, and at the same time, the counter T acquires the voltage value of V _OUT of the GPIO interface every time T, and determine whether the change occurs, and at the same time record the voltage value of V _OUT through the dual-bit register a.

In the practical application process, when a user purchases a notebook computer and starts the notebook computer for the first time, the magnetic field strength B is more than or equal to the magnetic field strength of the working point Bop, at this time, the voltage value V _OUT＝V_OL of the GPIO interface, the counter T is initialized, T=0, the double-position register A is also initialized, and A=00. When the user privately removes the notebook, the rear cover 4 is opened, the magnetic field intensity B is changed, the magnetic field intensity B is smaller than or equal to the magnetic field intensity of the release point Brp, V _OUT＝V_OH, the counter starts to count, T is not equal to 0, and a=11. After the user sends the notebook to the maintenance point, the maintenance personnel inquires the value of the counter T by utilizing the root authority, and when the inquiry is made that T is not equal to 0, the user is shown to disconnect the notebook, and the maintenance or charge maintenance is not performed. When t=0 is queried, free warranty is provided, and after warranty is finished, T is reset to 0 again by using the root authority, and the register value a is reinitialized to 00.

If, for example, when the rear cover 4 of the notebook is damaged or the rear cover 4 of the notebook is buckled loose, the rear cover 4 is slightly tilted, at this time, a gap appears between the rear cover 4 and the main board 3, but the gap appears differently from the case of privately disassembling the rear cover 4, at this time Brp < L < Bop, the voltage value V _OUT of the GPIO interface of the embedded controller EC is within the range of the interval, that is, V _OL＜V_OUT≤V_OH, at this time, the counter T value is not changed, T is still 0, but the register a is changed, a=01; after the user sends the notebook computer to a maintenance point, the maintenance personnel inquires that T=0 and A=01, the user does not privately detach the rear cover 4, the user can timely carry out free maintenance, and the register value A is reinitialized to 00 by using the root authority after the maintenance is finished.

In a second embodiment of the utility model, the sensor 1 is provided with a pressure sensitive sensor; the pressure-sensitive sensor includes: piezoresistive pressure-sensitive sensor 12, piezoelectric pressure-sensitive sensor or capacitive pressure-sensitive sensor. Further, the triggering device 2 is configured as a boss; the boss is attached to the pressure-sensitive sensor.

In a second embodiment, referring to fig. 5, fig. 5 is a schematic diagram of a pressure-sensitive sensor module of a device for detecting detachment of a notebook according to an embodiment of the present utility model, where the pressure-sensitive sensor is composed of a third resistor R1, a fourth resistor R2, a fifth resistor R3, and a sixth resistor R4, which are electrically connected in sequence, and are made of a piezoresistive effect of a single crystal silicon material; the pressure-sensitive sensor is integrated with a temperature compensation circuit and a differential amplifier, wherein one end of a third resistor R1 and one end of a sixth resistor R4 are electrically connected with the temperature compensation circuit; the other ends of the third resistor R1 and the sixth resistor R4, and one ends of the fourth resistor R2 and the fifth resistor R3 are electrically connected with the differential amplifier. Further, the pressure-sensitive sensor is electrically connected with the embedded controller EC through the output end of the differential amplifier. In the second embodiment, in a state that the third resistor R1, the fourth resistor R2, the fifth resistor R3, and the sixth resistor R4 are subjected to force, the resistivity corresponding to each resistor is changed, an electric signal proportional to the force change is obtained through a measurement circuit (not shown) integrated in the pressure sensor, and the electric signal is output to the embedded controller EC through the differential amplifier, so that whether the back cover 4 of the notebook is detached or not can be determined.

The operation principle of the pressure-sensitive sensor of the second embodiment will be briefly described.

The piezoresistive pressure sensor 12 is a sensor made of the piezoresistive effect of a monocrystalline silicon material, and when the monocrystalline silicon material is subjected to a force, the resistivity of the monocrystalline silicon material changes, and an electrical signal output proportional to the force change can be obtained through a measurement circuit integrated in the piezoresistive pressure sensor 12.

The working principle of the pressure sensor is as follows:

The output voltage V _OUT of the pressure-sensitive sensor is input to the GPIO interface of the embedded controller EC, and whether the notebook back cover 4 is opened is detected by detecting the change of V _OUT.

When the notebook computer is assembled, the piezoresistive pressure-sensitive sensor 12 on the main board 3 is attached to the boss, for example, the piezoresistive pressure-sensitive sensor 12 is tightly attached to the boss, the piezoresistive pressure-sensitive sensor 12 is under the action of pressure, and the output voltage V _OUT is V ₁; when a user privately dismounts the notebook, the rear cover 4 is opened, the piezoresistive pressure-sensitive sensor 12 is separated from the boss, the piezoresistive pressure-sensitive sensor 12 is not subjected to pressure effect, the pressure is 0, and at the moment, the output voltage V _OUT is changed into V ₂; when there is a slight gap between the rear cover 4 and the main board 3, the pressure sensor still receives pressure, and the output voltage V _OUT is V ₃, and V ₂＜V₃＜V₁ is the same.

A counter T is provided in the embedded controller EC, which counter t+1 when the piezoresistive pressure-sensitive sensor 12 outputs a voltage V _OUT＝V₃. At the same time, the state in which the rear cover 4 is slightly tilted is recorded by the register a. When the maintenance personnel inquires that T is not equal to 0, the user is informed to detach the notebook, and after the user is determined to detach the notebook, the operation method of the second embodiment is the same as that of the first embodiment, and the detailed description is omitted.

Furthermore, although illustrative embodiments are described herein, the scope includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of schemes across various embodiments), adaptations or alterations based on the present disclosure. Elements in the claims will be construed broadly based on the language used in the claims and not limited to examples described in the specification or during the lifetime of the application. Furthermore, the steps of the disclosed methods may be modified in any manner, including by reordering steps or inserting or deleting steps. It is intended, therefore, that the description be regarded as examples only, with a true scope being indicated by the following claims and their full range of equivalents.

The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. Other embodiments may be used by those of ordinary skill in the art after reading the above description. Moreover, in the foregoing detailed description, various features may be grouped together to simplify the present disclosure. This should not be interpreted as intending that an unclaimed disclosed feature is essential to any claim. Thus, the following claims are incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with one another in various combinations or permutations. The scope of the utility model should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

Claims

1. A device for detecting the removal of a notebook, comprising:

The sensor is arranged in the accommodating space of the notebook;

the triggering device is arranged on the inner side of the rear cover of the notebook and is opposite to the sensor;

An embedded controller electrically connected to the sensor;

And in the state that the triggering device triggers the sensor, the sensor transmits the parameter value to the embedded controller, and the embedded controller judges and determines whether the rear cover is detached or not based on the ratio between the parameter value and a preset value.

2. The device for detecting detachment of a notebook computer according to claim 1, wherein the sensor is disposed on a main board and is located in the accommodating space defined by the front cover and the rear cover together with the main board.

3. The device of claim 1, wherein the sensor is configured as a south pole responsive hall sensor.

4. The device for detecting the removal of a notebook according to claim 3, wherein the triggering device is configured as a magnet;

The magnet and the rear cover form fixed connection in a buckling manner, or

The magnet is internally arranged in the rear cover.

5. The device for detecting the removal of a notebook according to claim 4, wherein,

The input end of the south pole response Hall sensor is electrically connected with an input power supply through a first resistor, and the south pole response Hall sensor is connected with a first capacitor in parallel and is grounded through the first capacitor;

the first resistor is connected with the first capacitor in parallel and forms a filtering unit of the south pole response Hall sensor input end;

The output end of the south pole response Hall sensor is electrically connected with a second resistor and is electrically connected with an input power supply through the second resistor, the south pole response Hall sensor is connected with a second capacitor in parallel, the second capacitor is grounded, and the output end of the south pole response Hall sensor is filtered through the second capacitor;

and the south pole response Hall sensor is electrically connected with the embedded controller.

6. The device for detecting the removal of a notebook according to claim 4, wherein the magnet is coated with a galvanized iron sheet on a surface of a side thereof facing the rear cover.

7. The device for detecting the removal of a notebook according to claim 1, wherein the sensor is provided with a pressure-sensitive sensor; the pressure-sensitive sensor includes: piezoresistive pressure-sensitive sensor, piezoelectric pressure-sensitive sensor or capacitive pressure-sensitive sensor.

8. The device for detecting the removal of a notebook according to claim 7, wherein the triggering device is configured as a boss; the boss is attached to the pressure-sensitive sensor.

9. The device for detecting the disassembly of the notebook computer according to claim 8, wherein the pressure-sensitive sensor is composed of a third resistor, a fourth resistor, a fifth resistor and a sixth resistor which are sequentially and electrically connected through the piezoresistive effect of the monocrystalline silicon material; the pressure-sensitive sensor is integrated with a temperature compensation circuit and a differential amplifier, wherein one ends of the third resistor and the sixth resistor are electrically connected with the temperature compensation circuit; and the other ends of the third resistor, the sixth resistor and the fourth resistor and one end of the fifth resistor are electrically connected with the differential amplifier.

10. The device for detecting the removal of a notebook computer according to claim 9, wherein the pressure-sensitive sensor is electrically connected to the embedded controller through an output terminal of the differential amplifier.