WO2018165947A1

WO2018165947A1 - Pos machine, and physical protection device for pos machine

Info

Publication number: WO2018165947A1
Application number: PCT/CN2017/076970
Authority: WO
Inventors: 谢振辉; 刘正
Original assignee: 深圳大趋智能科技有限公司
Priority date: 2017-03-16
Filing date: 2017-03-16
Publication date: 2018-09-20
Also published as: CN107820626A

Abstract

A POS machine, and a physical protection device for the POS machine. The physical protection device for the POS machine is disposed the POS machine, and comprises conductive carbon particles (5), a solder mask (1), a parasitic capacitor (2), and a grounding plane (3). The solder mask (1), the parasitic capacitor (2) and the grounding plane (3) are all disposed on a PCB board (4). Two polar plates of the parasitic capacitor (2) are respectively connected to the solder mask (1) and the grounding plane (3). The conductive carbon particles (5) are pressed by the housing of the POS machine and are in contact with the solder mask (1), and the conductive carbon particles (5) are connected to a power supply (7) of the POS machine. The solder mask (1) is provided with an input/output port (8) connected to a processor of the POS machine.

Description

Technical field

[0001] The present invention relates to the field of POS machines, and in particular to a physical protection device for a POS machine and a POS machine.

Background technique

[0002] A POS machine is a sales terminal with a non-cash settlement function, and is widely used in supermarkets, chain stores, hypermarkets, restaurants, and the like. Because it involves money transactions such as bank cards, it has high requirements for its security performance. It is necessary to ensure that important data such as keys in the POS machine are not stolen.

[0003] The physical protection devices of today's POS machines are physically compliant, and the physical barriers are not only costly, but also bulky, and are also prone to false triggering, resulting in poor reliability.

technical problem

[0004] The main object of the present invention is to provide a POS physical protection device with small volume and good reliability and a POS machine having the physical protection device of the POS machine.

Problem solution

Technical solution

[0005] The present invention provides a physical protection device for a POS machine, which is disposed inside the POS machine and includes conductive carbon particles, a solder resist layer, a parasitic capacitance, and a ground plane. The solder resist layer, the parasitic capacitance, and the ground plane are all disposed on the PCB. The two plates of the parasitic capacitor are respectively connected to the solder resist layer and the ground plane; the conductive carbon particles are pressed by the POS casing and contacted with the solder resist layer, and the conductive carbon particles are connected to the POS power supply; the solder resist layer is provided with input/output The port, the input/output port is connected to the processor of the POS machine, and the processor detects the charging and discharging of the parasitic capacitance.

[0006] Further, the conductive carbon particles are cylindrical, and the two ends thereof are respectively abutted against the POS casing and the solder resist layer.

Further, the conductive carbon particles have a cross-sectional diameter of 1 to 1.5 mm.

Further, the parasitic capacitance has a capacitance of 5 pf to 20 pf.

[0009] Further, the conductive carbon particles are connected to the POS power source through a resistor, and the resistance is 5 to 10 megahertz.

[0010] Further, when the input \output port is set to an output and outputs a low level, the parasitic capacitance is discharged.

The input\output port is configured as a floating input mode, enabling and configuring a high-level interrupt, which begins to charge. [0011] Further, the outer side wall of the conductive carbon particle vertical solder resist layer is empty.

[0012]

[0013] A POS machine, comprising the above physical protection device of the POS machine.

Advantageous effects of the invention

Beneficial effect

[0014] The physical protection device of the POS machine and the POS machine of the invention adopts conductive carbon particles and a solder resist layer to form a touch barrier to replace the existing physical barrier, has small volume and low cost, and can be disposed as much as possible in a limited space. Multiple, forming multi-point arming, improve the safety of the POS machine, and its quality is very light, it is not easy to cause accidental collision in the case of shaking, etc., and the safety of the POS machine is also better.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of an embodiment of a physical protection device for a POS device according to the present invention;

2 is a schematic diagram of an equivalent circuit of FIG. 1.

[0017]

[0018] The implementation, functional features, and advantages of the present invention will be further described with reference to the accompanying drawings.

BEST MODE FOR CARRYING OUT THE INVENTION

The specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0020] Referring to FIG. 1-2, an embodiment of a POS physical protection device includes a conductive carbon particle 5, a solder resist layer 1, a parasitic capacitor 2, and a ground plane 3. The POS physical protection device is disposed inside the POS machine. The solder resist layer 1, the parasitic capacitor 2 and the ground plane 3 are all disposed on the PCB board 4; the two plates of the parasitic capacitor 2 are respectively connected to the solder resist layer 1 and the ground plane 3; the conductive carbon particles 5 are pressed by the POS casing The solder resist layer 1 is in contact, the conductive carbon particles 5 are connected to the POS power supply 7; the solder resist layer 1 is provided with an input/output port 8, the input/output port 8 is a GPIO, and the input/output port 8 is connected to the processor of the POS machine, and the processing is performed. The device detects the charge and discharge of the parasitic capacitance 2.

[0021] Referring to FIG. 2, wherein the conductive carbon particles 5 and the solder resist layer 1 form a touch barrier 9, the POS machine normally receives the contact with the solder resist layer 1 by the outer shell, and the touch barrier 9 is closed. When the shell is removed, the conductive carbon particles 5 go Except for the shell extrusion, it will be separated from the solder resist layer 1. When it touches the switch 9 and breaks, when the touch is turned off, the processor will detect the abnormality and judge the POS machine is not safe.

[0022] In the same way, the code read as the security firmware of the processor (CPU) needs to be verified by the signature before being downloaded, and cannot be arbitrarily falsified to ensure the security of the POS machine.

[0023] The daytime reading code includes information such as the time required for the parasitic capacitance 2 to be fully charged, the error range allowed during the day.吋读取读取对比对比对比对比对比对比对比对比对比读取读取读取 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Inside, it can be assumed that the POS machine is not working properly.

[0024] Under normal conditions, the touch switch 9 is closed, when the GPIO is set as the output and the output is low, the parasitic capacitance 2 is discharged until the parasitic capacitance 2 is zero; when the GPIO is set to the floating input mode, POS The power supply 7 charges the parasitic capacitor 2 and starts counting the charging time. When the parasitic capacitor 2 is fully charged, the charging behavior is automatically interrupted. At the end of this calculation, the data between the charging is sent to the processor, and the charging time is charged. Compared with the setting in the processor, it can be judged whether the capacitance of the parasitic capacitance 2 changes by the change of the charging time. When the capacitance changes beyond the allowable variation range of the set point, it is determined that the POS machine is no longer safe.

[0025] The charge and discharge condition of the parasitic capacitance 2 includes whether the parasitic capacitance 2 can be charged and the parasitic capacitance 2 is used for charging. The processor determines whether or not the conductive carbon particles 5 are detached and the capacitance of the parasitic capacitance 2 changes when the conductive carbon particles 5 are detached by the charge and discharge condition of the parasitic capacitance 2; when the capacitance of the parasitic capacitance 2 changes, it may be a POS The machine is filled with glue and other materials to fix the conductive carbon particles 5 and then the shell is removed. On behalf of the POS machine, there is a risk of modification. It is no longer safe to be properly handled. The monitoring of the physical protection device of the POS machine can reduce the risk of using the POS machine.

In the present embodiment, the conductive carbon particles 5 are cylindrical, and their ends are respectively abutted against the POS casing and the solder resist layer 1.

The conductive carbon particles 5 have a cross-sectional diameter of 1 to 1.5 mm. The physical protection device of the POS machine is small in size, and the cost is relatively low. The physical protection device of multiple POS machines can be set in one POS machine to reduce the risk that the physical protection device of the PO S machine is targeted.

[0027] The parasitic capacitance 2 has a capacitance of 5 pf to 20 pf. The small capacitance can be more sensitive to changes in capacitance, and it is less likely to be handled, and the safety of POS machines is higher.

[0028] The conductive carbon particles 5 are connected to the POS power source 7 through the resistor 6, and the resistor 6 functions as a protection circuit to prevent the current in the circuit from being excessive, and the resistor 6 is 5 to 10 megahertz. Resistor 6 is suitable for today's POS power supply 7 and parasitic capacitance 2 The circuit where the capacitor is located.

[0029] In this embodiment, when the input/output port 8 is set as an output and outputs a low level, the parasitic capacitance 2 is discharged; the input/output port 8 is configured as a floating input mode, enabled and configured high. Level interrupt, this parasitic capacitor 2 starts to charge.

[0030] When the capacitor is discharged until the power of the capacitor is discharged, the charge amount of the capacitor is zero, which can detect the accuracy of the parasitic capacitance 2 and reduce the probability of error.

[0031] In this embodiment, the outer side wall of the conductive carbon particle 5 vertical solder resist layer 1 is empty, that is, there is no other medium outside the conductive carbon particle 5, and there are other connection solder resist layers around the conductive carbon particle 5. The solid or liquid medium 吋, the capacitance of the parasitic capacitance 2 changes. In this way, when the material of the fixed conductive carbon particle 5 is artificially injected, the processor monitors the capacitance of the parasitic capacitance 2, thereby monitoring the situation that the POS machine is artificially modified and the POS machine is not safe enough to ensure the safety of the POS machine. Sex.

[0032] The POS machine is provided with a physical protection device for the POS machine to protect from the hardware side, and also has an anti-modification protection setting from the software side to fully protect the POS machine, and the POS machine has higher security.

[0033] The POS physical protection device of the present invention uses conductive carbon particles and the solder resist layer 1 to form a touch barrier 9 instead of the existing physical barrier, which is small in size and low in cost, and can be set as much as possible in a limited space. The formation of multi-point arming improves the safety of the POS machine, and its quality is very light. It is not easy to cause accidental collision under shaking and the like, and the safety of the POS machine is also better.

[0034]

[0035] The present invention also includes a POS machine including the above-described POS physical protection device.

[0036] The POS machine of the present invention adopts the above physical protection device of the POS machine, has small volume and low cost, and can be arranged as many as possible in a limited space to form a multi-point arming, thereby improving the safety of the POS machine, and the quality thereof. Very light, it is not easy to cause accidental bumps when shaking, etc., and the safety of the POS machine is better.

[0037] An embodiment of the invention:

[0038] Al, a POS physical protection device, is disposed inside the POS machine, and includes conductive carbon particles and a solder resist layer

, parasitic capacitance and ground plane;

[0039] the solder resist layer, the parasitic capacitance and the ground plane are both disposed on the PCB;

[0040] the two plates of the parasitic capacitance are respectively connected to the solder resist layer and the ground plane;

[0041] the conductive carbon particles are pressed by the POS casing to contact the solder resist layer, and the conductive carbon particles are connected to the POS machine. power supply;

[0042] The solder resist layer is provided with an input \ output port, and the input/output port is connected to a processor of the POS machine, and the processor detects a charge and discharge condition of the parasitic capacitance.

[0043]

[0044] A 2. The POS physical protection device as described in A1, wherein the conductive carbon particles are cylindrical, and the two ends thereof respectively abut the POS casing and the solder resist layer.

[0045]

[0046] A 3. The physical protection device of the POS machine as described in A 1, wherein the conductive carbon particles have a cross-sectional diameter of 1 to 1.5 mm.

[0047]

[0048] A. The POS physical protection device according to A1, wherein the parasitic capacitance has a capacitance of 5p and 20pf.

[0049]

[0050] A. The POS physical protection device according to A1, wherein the conductive carbon particles are connected to the POS power source through a resistor, and the resistance is 5 to 10 megahertz.

[0051]

[0052] A 6. The POS physical protection device according to A1, wherein when the input/output port is set as an output and outputs a low level, the parasitic capacitance is discharged; the input/output port configuration For floating mode, enable and configure a high-level interrupt, and the parasitic capacitor begins to charge.

[0053]

[0054] A. The POS physical protection device according to A1, wherein the conductive carbon particles are empty outside the sidewall of the solder resist layer.

[0055] An embodiment of the invention:

[0056] Bl, a POS machine, comprising the physical protection device of the POS machine according to any one of A1-7.

[0057]

[0058] The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are used directly or indirectly. Other related technical fields are equally included in the scope of patent protection of the present invention.

Claims

Claim

[Claim 1] A POS physical protection device is disposed inside the POS machine and includes a conductive carbon particle, a solder resist layer, a parasitic capacitance, and a ground plane;

The solder resist layer, the parasitic capacitance and the ground plane are all disposed on the PCB;

The two plates of the parasitic capacitance are respectively connected to the solder resist layer and the ground plane; the conductive carbon particles are pressed by the POS casing to contact the solder resist layer, and the conductive carbon particles are connected to the POS power source;

The solder resist layer is provided with an input \ output port, and the input/output port is connected to a processor of the POS machine, and the processor detects a charge and discharge condition of the parasitic capacitance.

[Claim 2] The POS physical protection device according to claim 1, wherein the conductive carbon particles are cylindrical, and the two ends thereof respectively abut the POS casing and the solder resist layer.

[Claim 3] The physical protection device for a POS machine according to claim 1, wherein the conductive carbon particles have a cross-sectional diameter of 1 to 1.5 mm.

[Claim 4] The POS physical protection device according to claim 1, wherein the parasitic capacitance has a capacitance of 5 pf to 20 pf.

[Claim 5] The POS physical protection device according to claim 1, wherein the conductive carbon particles are connected to the POS power source through a resistor, and the resistance is 5 to 10 megahertz.

[Claim 6] The POS physical protection device according to claim 1, wherein when the input/output port is set as an output and outputs a low level, the parasitic capacitance is discharged; the input\output port configuration For floating mode, enable and configure a high-level interrupt, and the parasitic capacitor begins to charge.

[Claim 7] The POS physical protection device according to claim 1, wherein the conductive carbon particles are empty outside the side wall of the solder resist layer.

[Claim 8] A POS machine, comprising the physical protection device for a POS machine according to any one of claims 1-7.