CN110133402A - A kind of position finding and detection method, system and the mobile terminal of circuit board screw - Google Patents
A kind of position finding and detection method, system and the mobile terminal of circuit board screw Download PDFInfo
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- CN110133402A CN110133402A CN201910397672.3A CN201910397672A CN110133402A CN 110133402 A CN110133402 A CN 110133402A CN 201910397672 A CN201910397672 A CN 201910397672A CN 110133402 A CN110133402 A CN 110133402A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The present invention provides position finding and detection method, system and the mobile terminals of a kind of circuit board screw, by for set screw each on circuit board corresponding series connection one and its whether in place associated resistance, and it is connected in parallel with each other between each resistance, situation of change by monitoring all-in resistance identifies the situation in place of each set screw, and according to the relation table in bit distribution of preset all-in resistance and set screw, set screw information in place corresponding with current all-in resistance is inquired, realizes the monitoring to set screw on circuit board.The method and system of offer of the present invention, only by resistance of connecting for each set screw just realize to circuit board tighten up a screw whether detection in place, it is convenient and easily operated to realize, to be provided convenience extremely as caused by the loosening of set screw on timely discovery circuit plate.
Description
Technical field
The present invention relates to SOT state of termination detection technique field more particularly to a kind of detection and localization sides of circuit board screw
Method, system and mobile terminal.
Background technique
Make to be typically all to carry out positioning admittedly to it using set screw on circuit board and peripheral devices inside mobile terminal
It is fixed, while the mechanical strength of circuit board and peripheral devices is also increased, in mobile terminal in use, the circuit board of mobile terminal
Set screw may be caused to loosen due to being shaken or colliding for a long time, will lead under mobile terminal machinery intensity
It drops or causes circuit board short-circuit, so that mobile terminal can not work normally.
Furthermore although mobile terminal can generally stick tamper identification label on one piece of set screw at present, user needs
Tamper must be identified label damage by the machine of tearing open, so that mobile terminal is put after sale by checking that tamper identifies that label is to judge user
It is no have tear machine open privately, but this traditional method first increases the cost of tamper identification paper, and second is easy the purchase of current network
Object is flourishing, and user becomes more readily available corresponding tamper identification label to restore to tear open machine scene, it is therefore necessary to mobile terminal
Each piece of set screw monitoring whether in place in circuit board, to record whether each piece of set screw the case where dislocation occurs.
Therefore, the existing technology needs further improvement.
Summary of the invention
In view of the above shortcomings in the prior art, it is an object of the invention to provide a kind of circuit board screw for user
Position finding and detection method and its system, overcome detection mode in the prior art single, and the defect that detection efficiency is low.
The technical proposal for solving the technical problem of the invention is as follows:
A kind of position finding and detection method of circuit board screw, wherein applied to the circuit board for being equipped with positioning detecting circuit；It is described fixed
Position detection circuit includes: several resistance in parallel and determines with several described concatenated several of resistance one-to-one correspondence in parallel
Position screw, each resistance pass through a set screw ground connection；
The method includes the steps:
A, the total resistance value of several resistance parallel with one another on the circuit board, and the total resistance value that will acquire are obtained
Compared with predetermined resistance value pair, judge whether identical, if not identical, thens follow the steps B；The predetermined resistance value is on circuit board
Total resistance value when set screw is in place；
B, it according to the mapping table of pre-stored total resistance value and set screw information in place, finds out and the total resistance value
Corresponding set screw information in place.
Optionally, before the step A, further includes:
A01, each set screw one resistance of series connection respectively on circuit boards；Wherein, each set screw is connected a resistance
Resistance value meets: the total resistance value after parallel with one another between one or more is different；
A02, it will be connected in parallel with each other between each resistance.
Optionally, before the step A, further includes:
A03, it is recorded respectively when one or more set screws are in place, corresponds to concatenated resistance and be linked into the detection and localization
Total resistance value after circuit, and according to one or more set screws information in place concatenated electricity corresponding with set screw of record
Resistance is linked into the total resistance value after the positioning detecting circuit, forms the corresponding relationship of total resistance value and set screw information in place
Table.
Optionally, the circuit board is mounted on the inside of mobile terminal and is connected with central processing unit；
The step A further include:
A11, the central processing unit obtain circuit by detecting the voltage value for the GPIO pin output that it is connected with circuit board
The total voltage value of plate；
A12, the total resistance value that the circuit board is calculated according to the total voltage value.
Optionally, the method also includes steps:
C, the voltage value of the output of GPIO pin described in the central processing unit timing acquisition, and institute is calculated according to the voltage value
State the total resistance value of circuit board；
D, when calculating the total resistance value and default total resistance value is not identical, then prompting message is issued.
Another embodiment provided by the invention is a kind of position detecting system of circuit board screw, wherein includes: setting
Positioning detecting circuit and circuitous resistance positioning detecting circuit on circuit boards；
The positioning detecting circuit includes: several resistance in parallel and connects with several described resistance one-to-one correspondence in parallel
Several set screws, each resistance passes through set screw ground connection；
The circuitous resistance positioning detecting circuit, comprising: resistance value detection module and Distribution Search module；
The resistance value detection module, for obtaining the total resistance value of several resistance parallel with one another on the circuit board, and will
The total resistance value got judges whether identical compared with predetermined resistance value pair；The predetermined resistance value is on circuit board
Total resistance value when set screw is in place；
The Distribution Search module, the mapping table of the total resistance value pre-stored for basis and set screw information in place,
Find out set screw information in place corresponding with the total resistance value.
Optionally, one resistance of each set screw series connection in the positioning detecting circuit；Wherein, each set screw series connection
The resistance value of one resistance meets: the total resistance value after parallel with one another between one or more is different.
Optionally, the circuitous resistance positioning detecting circuit further include: memory module；
The memory module is also used to store the mapping table of the total resistance value Yu set screw information in place；
The mapping table of the total resistance value and set screw information in place are as follows: one or more set screw information in place with
Set screw corresponds to the corresponding relationship between the total resistance value after concatenated resistance is linked into the positioning detecting circuit.
Another embodiment provided by the invention is a kind of mobile terminal, wherein includes: determining for the circuit board screw
Position detecting system and central processing unit；
The circuit board accesses the central processing unit by GPIO pin；
The central processing unit calculates total electricity of the circuit board for the voltage value by detecting the GPIO pin output
Resistance value.
Optionally, the central processing unit further include: abnormity prompt module；
The abnormity prompt module, for the voltage value of the output of GPIO pin described in timing acquisition, and according to the voltage value meter
Calculate the total resistance value of the circuit board；If the total resistance value and default total resistance value be not identical, prompting message is issued.
Beneficial effect, the present invention provides position finding and detection method, system and the mobile terminals of a kind of circuit board screw, pass through
For the corresponding series connection one of each set screw with its whether associated resistance, and company parallel with one another between each resistance in place
It connects, the situation of change by monitoring all-in resistance identifies the situation in place of each set screw, and according to preset total electricity
The relation table in bit distribution of resistance and set screw, inquires set screw information feelings in place corresponding with current all-in resistance
Condition realizes the monitoring to set screw on circuit board.The method and system of offer of the present invention, only by for each positioning
Screw connect a resistance just realize to circuit board tighten up a screw whether detection in place, it is convenient to realize, and easily operated, is
It is provided convenience extremely as caused by the loosening of set screw on timely discovery circuit plate.
Detailed description of the invention
Fig. 1 is the step flow chart of the position finding and detection method of circuit board screw of the present invention；
Fig. 2 is the realization principle schematic diagram that positioning detecting circuit described in the method for the invention is applied on mobile terminal；
Fig. 3 is the schematic illustration of positioning detecting circuit in the method for the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and do not have to
It is of the invention in limiting.
Since the set screw loosening on mobile terminal or other equipment on circuit board will have a direct impact on the items of equipment
Performance, and whether the set screw on circuit board is loosened and is detected, it needs to carry out equipment to dismantle and whether send out it
The machine situation of tearing open was given birth to be identified.Tear open machine to equipment, then not only process is complicated, it is also necessary to each set screw whether
Loosening is checked, therefore detection process is comparatively laborious, and equipment has been split machine and can not loosen as set screw
Judgment basis, therefore it is simple to judge that method that set screw loosens is not able to satisfy process in the prior art, is easy to grasp
The characteristics of making.
The present invention provides a kind of position finding and detection methods of circuit board screw, applied to the electricity for being equipped with positioning detecting circuit
Road plate；The positioning detecting circuit includes several resistance in parallel and connects with several described resistance one-to-one correspondence in parallel
Several set screws, each resistance passes through set screw ground connection；Whether each resistance accesses the detection and localization electricity
Whether the set screw that road is secured to installation is in place corresponding；
It the described method comprises the following steps as shown in Figure 1:
S1, the total resistance value for obtaining several resistance parallel with one another on the circuit board, and the all-in resistance that will acquire
Value judges whether identical compared with predetermined resistance value pair, if not identical, thens follow the steps S2；The predetermined resistance value is circuit
Total resistance value when set screw is in place on plate.
It connects respectively a resistance to each set screw on circuit board first.Specifically, whether the resistance accesses
Whether positioning detecting circuit is associated in place with set screw, that is to say: when set screw is in place, then connecting with the set screw
Resistance access positioning detecting circuit not in place, then do not connect with the concatenated resistance of the set screw if set screw loosens
Enter positioning detecting circuit.
In this method, for ease of calculation and convenient for operation, ignore the resistance value of the set screw in access circuit, but it is real
Each set screw has certain resistance value in the application of border, can be by first to each set screw when being calculated
Resistance value is detected, and the resistance value of each set screw resistance itself is obtained, and further according to the resistance value of the resistance of series connection with it, is calculated
Total resistance value of entire positioning detecting circuit.
Due to it is each with the concatenated resistance of set screw be between each other to be connected in parallel, when wherein one or more not
Positioning detecting circuit is accessed, can also detect the total resistance value of entire positioning detecting circuit respectively.
Since the resistance being laid out on circuit board is related to the position of set screw and number, also wrapped before this step
It includes:
S01, each set screw one resistance of series connection respectively on circuit boards；Wherein, each set screw is connected a resistance
Resistance value meets: the total resistance value after parallel with one another between one or more is different；
S02, it will be connected in parallel with each other between each resistance.
In order to realize that the variation of the total resistance value of circuit board corresponds to a kind of set screw state in place, therefore on circuit board
The resistance value that each resistance needs to meet resistance is different, and the total resistance value that wherein one or more parallel connection access circuits obtain is not
Identical requirement.
S2, according to the mapping table of pre-stored total resistance value and set screw information in place, find out with it is described total
The corresponding set screw of resistance value information in place.
When detecting that the total resistance value on circuit board changes in above-mentioned steps, then illustrate to position on circuit board
Screw situation not in place, then by by the total resistance value and set screw information in place of current total resistance value and default storage
Corresponding relationship mark in total resistance value compared to pair, obtain set screw information in place corresponding thereto.
The set screw information in place include: one or more resistance be respectively connected to it is corresponding when positioning detecting circuit
Total resistance value.The resistance access positioning detecting circuit of different resistance and different numbers is all satisfied total resistance value difference, that is to say
One total resistance value corresponds to a kind of set screw information in place.
Further, before the step S1, further includes:
S03, it is recorded when one or more set screws are in place, after concatenated resistance is linked into positioning detecting circuit respectively
Total resistance value, and be linked into according to the one or more set screws information in place and the concatenated resistance of the set screw of record
Total resistance value after the positioning detecting circuit forms the mapping table of total resistance value and set screw information in place.
Further, the circuit board is mounted on the inside of mobile terminal and is connected with central processing unit；Central processing
Therefore voltage value that device can be exported by connecting interface detection circuit board, calculates total resistance value according to the voltage value of output.
Specifically, the step S1 further include:
The voltage value for the GPIO pin output that S11, the detection central processing unit are connected with circuit board；
S12, the total resistance value that the circuit board is calculated according to the voltage value.
As shown in Fig. 2, circuit board of the present invention is arranged inside mobile terminal, the set screw on the circuit board is used for
Electronic component is fixed, the positioning detecting circuit on the circuit board is linked on central processing unit by GPIO pin.Institute
The all-in resistance of positioning detecting circuit on circuit board can be obtained by GPIO pin by stating central processing unit, described total to what is got
Whether the resistance value of resistance changes, to realize whether be monitored in place to set screw on circuit board.
Due to central processing unit can timing the situation in place of set screw is monitored, then it is further, can be with
Information warning is issued according to the case where monitoring.
Specifically, the method also includes steps:
The voltage value of the output of GPIO pin described in S3, the central processing unit timing acquisition, and calculated according to the voltage value
The total resistance value of the circuit board；
S4, judge whether the total resistance value is identical as default total resistance value, if not identical, issue prompting message.
The prompting message can be the combination of acoustic information, text information or acoustic information and text information.
It is to position spiral shell on a kind of circuit board the present invention also provides another embodiment on the basis of above-mentioned monitoring method
Silk whether monitoring system in place, wherein include: setting positioning detecting circuit on circuit boards and circuitous resistance detection and localization
Circuit；
The positioning detecting circuit includes: several resistance in parallel and connects with several described resistance one-to-one correspondence arranged side by side
Several set screws, each resistance passes through set screw ground connection；Whether each resistance accesses circuit series connection with it
Whether set screw is in place corresponding；
The circuitous resistance positioning detecting circuit, comprising: resistance value detection module and Distribution Search module；
The resistance value detection module, for obtaining the total resistance value of several resistance parallel with one another on the circuit board, and will
The total resistance value got judges whether identical compared with predetermined resistance value pair；The predetermined resistance value is on circuit board
Total resistance value when set screw is in place；
The Distribution Search module, the mapping table of the total resistance value pre-stored for basis and set screw information in place,
Find out set screw information in place corresponding with the total resistance value.
Set screw and resistance correspond in the positioning detecting circuit, and the resistance value of each resistance is all different, and
It is connected in parallel with each other between each resistance.
The circuitous resistance positioning detecting circuit further include: memory module；
The memory module is also used to store the mapping table of the total resistance value Yu set screw information in place；
The mapping table of the total resistance value and set screw information in place are as follows: record is when one or more set screws respectively
When in place, correspond to the total resistance value that concatenated resistance is linked into after the positioning detecting circuit, and according to one of record or
Multiple corresponding concatenated resistance of set screw information in place are linked into the total resistance value institute shape after the positioning detecting circuit
At.
It is a kind of mobile terminal the present invention also provides another embodiment, as shown in connection with fig. 2, comprising: the circuit
Set screw monitoring system whether in place and central processing unit 200 on locating circuit board on plate；
The circuit board 100 accesses the central processing unit 200 by GPIO pin；
The central processing unit 200 calculates the circuit board for the voltage value by detecting the GPIO pin output
Total resistance value.
As shown in connection with fig. 3, the voltage Vgpio on GPIO is obtained, detection and localization electricity can be obtained by according to following formula
The resistance value Rc on road；
When VDD-Vgpio is not equal to zero, Rc is Vgpio * R0/(VDD-Vgpio)
When VDD-Vgpio is equal to zero, Rc is infinity, i.e., all set screws are not in place.
In order to save the energy of mobile terminal, in the electricity for obtaining positioning detecting circuit on circuit board every the presetting time
Following steps can also be used when resistance value:
A1 enables VDD；
A2 obtains the resistance value of positioning detecting circuit；
A3 closes VDD.
Optionally, the central processing unit further include: abnormity prompt module；
The abnormity prompt module, for the voltage value of the output of GPIO pin described in timing acquisition, and according to the voltage value meter
Calculate the total resistance value of the circuit board；If the total resistance value and default total resistance value be not identical, prompting message is issued.
Further, the calculated result in parallel between the resistance of each set screw, each resistance is not mutually equal specific
It is provided that
If N number of resistance being not mutually equal that N number of set screw is configured is R1、R2、R3、……、RN-1、RN；It needs to meet following
Each value is not mutually equal:
R1、R2、R3、……、RN-1、RN 、
R1//R2、R1//R3、R1//R4、……、R1//RN-1、R1//RN 、
R2//R3、R2//R4、R2//R5、……、R2//RN-1、R2//RN 、
R3//R4、R3//R5、R3//R6、……、R3//RN-1、R3//RN 、
……、
RN-3//RN-2、RN-3//RN-1、RN-3//RN 、
RN-2//RN-1、RN-2//RN 、
RN-1//RN 、
……、
R1//R2//R3、R1//R2//R4、R1//R2//R5、……、R1//R2//RN-1、R1//R2//RN 、
R2//R3//R4、R2//R3//R5、R2//R3//R6、……、R2//R3//RN-1、R2//R3//RN 、
R3//R4//R5、R3//R4//R6、R3//R4//R7、……、R3//R4//RN-1、R3//R4//RN 、
……、
RN-4//RN-3//RN-2、RN-4//RN-3//RN-1、RN-4//RN-3//RN、
RN-3//RN-2//RN-1、RN-3//RN-2//RN 、
RN-2//RN-1//RN 、
……、
R1//R2//R3//……//RN-1//RN
Wherein, the resistance value after X//Y indicates resistance X and resistance Y and hinders, i.e. X//Y=(X*Y)/(X+Y)；
Two simply examples are lifted again to come illustratively:
Example one, R1=2k ohm, R2=3k ohm, R3=5k ohm, then R1=2k ohm, R2=3k ohm, R3=5k ohm,
R1//R2=1.2k ohm, R1//R3=1.429k ohm, R2//R3=1.875k ohm, R1//R2//R3=0.968k ohm this
A little resistance values are not mutually equal, therefore R1=2k ohm, R2=3k ohm, R3=5k ohm can be respectively as three set screws
Resistance；
Example two, R1=2k ohm, R2=3k ohm, R3=1.2k ohm, then R1//R2=1.2k ohm and R3It is equal, therefore
R1=2k ohm, R2=3k ohm, R3=5k ohm of the resistance that cannot function as three set screws.
Based on the positioning detecting circuit, any one set screw state has unique resistance value to be corresponding to it, because
This, can realize the state for set screws all on mobile terminal by the variation of monitoring positioning detecting circuit resistance value
Monitoring: for example, have one piece or more pieces of set screws loosen, specifically which piece or more pieces of set screw pines can be monitored to
It is dynamic；Again for example, because all set screws are not in place when tearing machine open, therefore all set screws each time are recorded in the terminal
It is not in place, thus to record the number that mobile terminal is split machine.
Below by taking concrete application embodiment as an example, the method disclosed in the present, system and mobile terminal are done further
Detailed explanation.
If only as described below to the case where three positioning screws are monitored on circuit board:
The resistance connected on three set screws is respectively as follows: R1=2k ohm of resistance, the set screw 2 connected on set screw 1
R3=5k ohm of resistance connected on R2=3k ohm of the resistance of upper connection, set screw 3.When set screw is in place, correspond to
Featured resistance and ground short circuit, when set screw is not in place, corresponding resistance and ground open a way, therefore, be based on above-mentioned resistance
Value has determined that whether the corresponding three gongs nail of each resistance value is in place on inspection positioning detecting circuit in mobile terminal production
State is as follows:
| The resistance value Rc of positioning detecting circuit | The state of three set screws |
| R1, that is, 2k ohm | Set screw 1 is in place, set screw 2 is not in place, set screw 3 is not in place |
| R2, that is, 3k ohm | Set screw 1 is not in place, set screw 2 is in place, set screw 3 is not in place |
| R3, that is, 5k ohm | Set screw 1 is not in place, set screw 2 is not in place, set screw 3 is in place |
| R1//R2, that is, 1.2k ohm | Set screw 1 is in place, set screw 2 is in place, set screw 3 is not in place |
| R1//R3That is 1.429k ohm | Set screw 1 is in place, set screw 2 is not in place, set screw 3 is in place |
| R2//R3That is 1.875k ohm | Set screw 1 is not in place, set screw 2 is in place, set screw 3 is in place |
| R1//R2//R3That is 0.968k ohm | Set screw 1 is in place, set screw 2 is in place, set screw 3 is in place |
| It is infinitely great | Set screw 1 is not in place, set screw 2 is not in place, set screw 3 is not in place |
In view of the convenience of detection in actually detected, using the electricity on detection GPIO99 pin in concrete application embodiment
Vgpio is pressed to replace the resistance value Rc of detection detection device, transformational relation is very simple:
Vgpio=Rc * VDD/(R0+Rc)
Wherein, resistance R0 plays the role of partial pressure and current limliting.It can be obtained based on above-mentioned formula, need to can only be known according to Vgpio
Rc.According to Rc in conjunction with aforementioned table it is known that the situation in place of each piece of set screw.
The present invention provides position finding and detection method, system and the mobile terminals of a kind of circuit board screw, by being each fixed
The corresponding series connection one of position screw and its whether in place associated resistance, and be connected in parallel with each other between each resistance, pass through
The situation of change of monitoring all-in resistance identifies the situation in place of each set screw, and according to preset all-in resistance and positions
The relation table in bit distribution of screw inquires set screw information state in place corresponding with current all-in resistance, realizes
Monitoring to set screw on circuit board.The method and system of offer of the present invention, only by for each set screw it is equal
Resistance of connecting just realize to circuit board tighten up a screw whether detection in place, it is convenient to realize, and easily operated, for hair in time
It is provided convenience extremely as caused by the loosening of set screw on existing circuit board.
It, can according to the technique and scheme of the present invention and its hair it is understood that for those of ordinary skills
Bright design is subject to equivalent substitution or change, and all these changes or replacement all should belong to the guarantor of appended claims of the invention
Protect range.
Claims (10)
1. a kind of position finding and detection method of circuit board screw, which is characterized in that applied to the circuit for being equipped with positioning detecting circuit
Plate；The positioning detecting circuit includes: several resistance in parallel and connects with several described resistance one-to-one correspondence in parallel
Several set screws, each resistance passes through set screw ground connection；
The method includes the steps:
A, the total resistance value of several resistance parallel with one another on the circuit board, and the total resistance value that will acquire are obtained
Compared with predetermined resistance value pair, judge whether identical, if not identical, thens follow the steps B；Wherein, the predetermined resistance value is electricity
Total resistance value when set screw is in place on the plate of road；
B, it according to the mapping table of pre-stored total resistance value and set screw information in place, finds out and the total resistance value
Corresponding set screw information in place.
2. the position finding and detection method of circuit board screw according to claim 1, which is characterized in that before the step A, also
Include:
A01, each set screw one resistance of series connection respectively on circuit boards；Wherein, each set screw is connected a resistance
Resistance value meets: the total resistance value after parallel with one another between one or more is different；
A02, it will be connected in parallel with each other between each resistance.
3. the position finding and detection method of circuit board screw according to claim 2, which is characterized in that before the step A, also
Include:
A03, it is recorded respectively when one or more set screws are in place, corresponds to concatenated resistance and be linked into the detection and localization
Total resistance value after circuit, and it is corresponding with its set screw concatenated according to one or more set screws information in place of record
Resistance is linked into the total resistance value after the positioning detecting circuit, forms total resistance value pass corresponding with set screw information in place
It is table.
4. the position finding and detection method of circuit board screw according to claim 2, which is characterized in that the circuit board is mounted on
The inside of mobile terminal and it is connected with central processing unit；
The step A further include:
A11, the central processing unit obtain circuit by detecting the voltage value for the GPIO pin output that it is connected with circuit board
The total voltage value of plate；
A12, the total resistance value that the circuit board is calculated according to the total voltage value.
5. the position finding and detection method of circuit board screw according to claim 4, which is characterized in that the method also includes steps
It is rapid:
C, the voltage value of the output of GPIO pin described in the central processing unit timing acquisition, and institute is calculated according to the voltage value
State the total resistance value of circuit board；
D, when calculating the total resistance value and default total resistance value is not identical, then prompting message is issued.
6. a kind of position detecting system of circuit board screw characterized by comprising detection and localization electricity on circuit boards is arranged
Road and circuitous resistance positioning detecting circuit；
The positioning detecting circuit includes: several resistance in parallel and connects with several described resistance one-to-one correspondence in parallel
Several set screws, each resistance passes through set screw ground connection；
The circuitous resistance positioning detecting circuit, comprising: resistance value detection module and Distribution Search module；
The resistance value detection module, for obtaining the total resistance value of several resistance parallel with one another on the circuit board, and will
The total resistance value got judges whether identical compared with predetermined resistance value pair；The predetermined resistance value is on circuit board
Total resistance value when set screw is in place；
The Distribution Search module, the mapping table of the total resistance value pre-stored for basis and set screw information in place,
Find out set screw information in place corresponding with the total resistance value.
7. the position detecting system of circuit board screw according to claim 6, which is characterized in that the positioning detecting circuit
In each set screw connect a resistance；Wherein, the resistance value of one resistance of each set screw series connection meets: between one or more
Total resistance value after parallel with one another is different.
8. the position detecting system of circuit board screw according to claim 6, which is characterized in that the circuitous resistance positioning
Detection circuit further include: memory module；
The memory module is also used to store the mapping table of the total resistance value Yu set screw information in place；
The mapping table of the total resistance value and set screw information in place are as follows: one or more set screw information in place with
Set screw corresponds to the corresponding relationship between the total resistance value after concatenated resistance is linked into the positioning detecting circuit.
9. a kind of mobile terminal characterized by comprising the positioning of the described in any item circuit board screws of claim 6-8 is examined
Examining system and central processing unit；
The circuit board accesses the central processing unit by GPIO pin；
The central processing unit calculates total electricity of the circuit board for the voltage value by detecting the GPIO pin output
Resistance value.
10. mobile terminal according to claim 9, which is characterized in that the central processing unit further include: abnormity prompt mould
Block；
The abnormity prompt module, for the voltage value of the output of GPIO pin described in timing acquisition, and according to the voltage value meter
Calculate the total resistance value of the circuit board；If the total resistance value and default total resistance value be not identical, prompting message is issued.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910397672.3A CN110133402A (en) | 2019-05-14 | 2019-05-14 | A kind of position finding and detection method, system and the mobile terminal of circuit board screw |
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|---|---|---|---|
| CN201910397672.3A CN110133402A (en) | 2019-05-14 | 2019-05-14 | A kind of position finding and detection method, system and the mobile terminal of circuit board screw |
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| CN110133402A true CN110133402A (en) | 2019-08-16 |
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|---|---|---|---|
| CN201910397672.3A Pending CN110133402A (en) | 2019-05-14 | 2019-05-14 | A kind of position finding and detection method, system and the mobile terminal of circuit board screw |
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Cited By (2)
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Application publication date: 20190816 |