CN220207766U - Optical fingerprint test circuit and device suitable for multi-fingerprint test - Google Patents
Optical fingerprint test circuit and device suitable for multi-fingerprint test Download PDFInfo
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- CN220207766U CN220207766U CN202321581712.8U CN202321581712U CN220207766U CN 220207766 U CN220207766 U CN 220207766U CN 202321581712 U CN202321581712 U CN 202321581712U CN 220207766 U CN220207766 U CN 220207766U
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Abstract
The utility model discloses an optical fingerprint test circuit and a device thereof, which are suitable for multi-fingerprint test; wherein, it is realized by the following two aspects: in a first aspect, an optical fingerprint test circuit adapted for multi-fingerprint testing, comprising: n fingerprint modules, wherein N is a natural number greater than 1; the communication switching module is respectively connected with the N fingerprint modules; the main control chip is connected with the communication switching module; the power supply module is connected with the main control chip; in a second aspect, an optical fingerprint testing device suitable for multi-fingerprint testing comprises a testing base, and further comprises an optical fingerprint testing circuit suitable for multi-fingerprint testing, wherein a testing table is arranged at the top of the testing base; the optical fingerprint test circuit suitable for multi-fingerprint test realizes the test and transmission connection of a plurality of fingerprint modules by replacing IO transmission with communication transmission; the optical fingerprint testing device suitable for multi-fingerprint testing is time-saving and labor-saving, and can realize batch testing.
Description
Technical Field
The utility model relates to the technical field of fingerprint testing, in particular to an optical fingerprint testing circuit and device suitable for multi-fingerprint testing.
Background
The existing fingerprint module testing device is usually a single fingerprint module testing device, namely, a manufacturer needs to be equipped with a testing scheme for testing in order to meet the fingerprint module specially designed for self production.
Therefore, after the fingerprint module is purchased, a tester needs to match corresponding test schemes and test flows according to different fingerprint modules in the test process.
However, the above test procedure suffers from two drawbacks:
1. the fingerprint module needs to be tested one by one according to the type of the fingerprint module, and the defects of time and labor waste exist;
2. if the testers match the test schemes which are wrongly corresponding, misjudgment is easy to occur, and the fingerprint module is seriously damaged.
Meanwhile, the optical fingerprint test circuit inside the fingerprint module test device comprises a main control chip which directly performs signal transmission with the fingerprint modules through the IO interfaces, and the main control chip is also provided with interfaces for power supply, monitoring, output, logic control and the like, so that the available IO interfaces on the main control chip are fewer and a plurality of fingerprint modules cannot be connected again. Therefore, the optical fingerprint test circuit has the defect that a plurality of fingerprint modules cannot be tested.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide an optical fingerprint test circuit and a device thereof, wherein the optical fingerprint test circuit is suitable for multi-fingerprint test, and communication transmission replaces IO transmission, so that a plurality of fingerprint module tests and transmission connection are expanded and realized, and the optical fingerprint test device is suitable for multi-fingerprint test, and is time-saving and labor-saving.
In order to achieve the above purpose, the present utility model is realized by the following technical scheme:
an object of the present utility model is an optical fingerprint test circuit suitable for multi-fingerprint testing, comprising:
the fingerprint detection device comprises N fingerprint modules, a detection module and a detection module, wherein the N fingerprint modules are used for sensing fingerprint pressing, collecting fingerprint images and generating fingerprint collecting signals, wherein N is a natural number larger than 1;
the communication transfer module is respectively connected with the N fingerprint modules and is used for transmitting fingerprint acquisition signals;
the main control chip is connected with the communication switching module and is used for receiving the fingerprint acquisition signal, identifying the type of the fingerprint module and carrying out fingerprint test processing on the fingerprint acquisition signal;
and the power supply module is connected with the main control chip.
Preferably, the communication switching module comprises an I2C expansion module, and the I2C expansion module comprises a main communication interface connected with the main control chip and sub communication interfaces connected with the N fingerprint modules respectively.
Preferably, the fingerprint module comprises a pressure detection unit, an optical sensor and a fingerprint acquisition chip, and the fingerprint acquisition chip is connected with the sub-communication interface.
Preferably, the main control chip comprises a chip connection module, the chip connection module is connected with the main communication interface, the chip connection module is provided with a seventh pin, and the seventh pin is connected with a test indicator lamp.
Preferably, the I2C expansion module is a DFR0576 module or a PCA9548 module; the DFR0576 module has the advantage of more expansion interfaces, and the PCA9548 module has the advantages of smaller volume and power consumption.
Preferably, the power supply module comprises a USB power supply module and a 3.3V voltage stabilizing module connected with the USB power supply module.
Preferably, the 3.3V voltage stabilizing module is an EMP8130 module, and the EMP8130 module outputs 3.3V voltage more stably.
The utility model further provides an optical fingerprint testing device suitable for multi-fingerprint testing, which comprises a testing base and an optical fingerprint testing circuit suitable for multi-fingerprint testing, wherein the optical fingerprint testing circuit is arranged on the testing base, a testing table is arranged at the top of the testing base, N first mounting grooves for inserting fingerprint testing modules are formed in the testing table, a second mounting groove for mounting a power supply module is formed above the first mounting groove, a display screen is arranged on one side of the second mounting groove, and the display screen is connected with a main control chip.
Compared with the prior art, the utility model has the beneficial effects that:
1. the optical fingerprint test circuit suitable for multi-fingerprint test provided by the utility model replaces IO transmission by communication transmission, and expands and realizes the test and transmission connection of a plurality of fingerprint modules; the fingerprint module type identification device is characterized in that N fingerprint modules are connected with a communication transfer module, the communication transfer module is connected with a main control chip through an SDA data transmission line and an SCL clock transmission line of a communication interface, and the main control chip judges the fingerprint module type by receiving fingerprint acquisition signals and analyzing data content of the fingerprint acquisition signals or identifies the fingerprint module type through an interface address and a preset program of the fingerprint module corresponding to the communication transfer module. Therefore, the optical fingerprint test circuit has the advantages that the number of IO interface connections of the main control chip is reduced, and the number of fingerprint module tests is increased.
2. The optical fingerprint testing device suitable for multi-fingerprint testing is convenient for testers to directly test N fingerprint modules, achieves batch testing, saves time and labor, and also avoids the situations of mismatching of the testers, misjudgment or damage of the fingerprint modules caused by different types of the fingerprint modules.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic circuit diagram of an optical fingerprint test circuit suitable for multi-fingerprint testing according to embodiment 1 of the present utility model;
fig. 2 is a schematic structural diagram of a fingerprint module provided in embodiment 1 of the present utility model;
fig. 3 is a schematic structural diagram of a chip connection module according to embodiment 1 of the present utility model;
fig. 4 is a top view of an optical fingerprint test apparatus suitable for multi-fingerprint testing according to embodiment 2 of the present utility model.
The drawings include:
1. a fingerprint module; 11. a pressure detection unit; 12. an optical sensor; 13. a fingerprint acquisition chip; 2. a chip connection module; 21. a test indicator light; 3. a test bench; 31. a first mounting groove; 32. a second mounting groove; 33. a third mounting groove; 34. and a display screen.
Detailed Description
The technical solutions of the present embodiment of the present utility model will be clearly and completely described below with reference to the drawings in the present embodiment of the present utility model, and it is apparent that the described present embodiment is one embodiment of the present utility model, but not all the present embodiments. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
Example 1:
referring to fig. 1 to 3, an optical fingerprint test circuit suitable for multi-fingerprint test according to an embodiment of the present utility model includes: the fingerprint detection device comprises N fingerprint modules 1, a fingerprint detection module and a fingerprint detection module, wherein the N fingerprint modules are used for sensing fingerprint pressing, collecting fingerprint images and generating fingerprint collection signals, wherein N is a natural number larger than 1; the communication transfer module is respectively connected with the N fingerprint modules 1 and is used for transmitting fingerprint acquisition signals; the main control chip is connected with the communication switching module and is used for receiving the fingerprint acquisition signal, identifying the type of the fingerprint module 1 and carrying out fingerprint test processing on the fingerprint acquisition signal; and the power supply module is connected with the main control chip.
The communication transfer module comprises an I2C expansion module, wherein the I2C expansion module comprises a main communication interface connected with a main control chip and sub communication interfaces respectively connected with the N fingerprint modules 1. The main communication interface and the N sub communication interfaces each include an SDA data transmission line and an SCL clock transmission line. The N sub-communication interfaces of the I2C expansion module may be equipped with N different interface addresses, so as to identify which position of the fingerprint module 1 is being fingerprint tested when the fingerprint is collecting a signal.
The fingerprint module 1 includes pressure detection unit 11, optical sensor 12 and fingerprint acquisition chip 13, and pressure detection unit 11 is used for responding to the fingerprint and presses, and optical sensor 12 is used for gathering fingerprint image, and fingerprint acquisition chip 13 is used for generating fingerprint acquisition signal, and fingerprint acquisition chip 13 is connected with sub-communication interface, specifically, SDA interface and SCL interface on the fingerprint acquisition chip 13 are connected with SDA data transmission line and SCL clock transmission line in the sub-communication interface respectively.
The main control chip comprises a chip connection module 2, wherein the chip connection module 2 can be an integrated functional module of the main control chip or a connection module which is expanded outside the main control chip, and the aim is to reduce the number of IO port connections of the main control chip and optimize the circuit connection layout. The chip connection module 2 is connected with the main communication interface, the chip connection module 2 is provided with seven pins, namely a first pin to a seventh pin, wherein the first pin and the sixth pin are respectively grounded, the second pin is connected to an SDA data transmission line of the main communication interface, the third pin is connected to an SCL clock transmission line of the main communication interface, the first pin is externally connected to a grounding end of the main control chip, the fourth pin is connected to a power supply end of the main control chip and a power supply end of the power supply module, the seventh pin is connected with a test indicator lamp 21, and when the main control chip receives a fingerprint acquisition signal, the seventh pin can be triggered to light the test indicator lamp 21.
The I2C expansion module is a DFR0576 module or a PCA9548 module. The DFR0576 module has the advantage of more expansion interfaces, and the PCA9548 module has the advantages of smaller volume and power consumption.
The power supply module comprises a USB power supply module and a 3.3V voltage stabilizing module connected with the USB power supply module, wherein the 3.3V voltage stabilizing module is connected with the main control chip, and the 3.3V voltage stabilizing module is an EMP8130 module. The EMP8130 module outputs 3.3V voltage more stably.
An optical fingerprint test circuit suitable for multi-fingerprint test in this embodiment, the theory of operation is: pressing one fingerprint module 1 of the N fingerprint modules 1 to test, wherein the fingerprint module 1 collects fingerprint images and generates fingerprint collection signals, the fingerprint module 1 transmits the fingerprint collection signals to a communication transfer module, and the communication transfer module transmits the fingerprint collection signals to a main control chip; the first function of the main control chip is to receive the fingerprint acquisition signal. The second function is to identify the type of fingerprint module 1, and the type of fingerprint module 1 has two methods: firstly, a fingerprint module 1 type judging program is set in the fingerprint module, namely the data content of fingerprint acquisition signals of different fingerprint module 1 types is different, and judgment is carried out according to the different data content; the second type of the fingerprint module 1 is different through the interface address of the communication transfer module, what the type of the fingerprint module 1 of each interface address is preset, one interface address corresponds to the same fingerprint module 1, when the fingerprint module 1 is connected, as long as the fingerprint module 1 sends out a fingerprint acquisition signal, the main control chip can receive the interface address and the corresponding fingerprint acquisition signal, and the fingerprint acquisition signal is subjected to fingerprint test processing immediately. The third function of the main control chip is to perform fingerprint test processing on the fingerprint acquisition signal according to the fingerprint test program in the main control chip by the corresponding type of the fingerprint module 1.
The optical fingerprint test circuit suitable for multi-fingerprint test has the advantages that: the number of IO interface connections of the main control chip is reduced, and the number of tests of the fingerprint module 1 is increased. In addition, the number of main control chips is reduced, the multi-fingerprint test can be realized by a single main control chip, the circuit structure is optimized, and the volume of the circuit board is reduced.
Example 2:
referring to fig. 4, an embodiment of the present utility model provides an optical fingerprint testing apparatus suitable for multi-fingerprint testing, which includes a testing base, and further includes an optical fingerprint testing circuit suitable for multi-fingerprint testing, which is installed on the testing base and is provided with a testing table 3 at the top of the testing base, N first mounting slots 31 for inserting a fingerprint testing module are provided on the testing table 3, a second mounting slot 32 for installing a power supply module is provided above the first mounting slot 31, a display screen 34 is provided on one side of the second mounting slot 32, and the display screen 34 is connected with a main control chip.
The number of N is 4, that is, the number of test modules is set to 4, and the number of the first mounting grooves 31 is correspondingly set to 4.
The bottom of the first mounting groove 31 is provided with an SDA plug and an SCL plug for inserting the SDA interface and the SCL interface of the fingerprint acquisition chip 13 of the fingerprint module 1, and the SDA plug and the SCL plug are connected to the sub-communication interface of the communication transfer module.
The second mounting groove 32 is mainly used for mounting a USB power module for plugging in by a user.
The main control chip, the communication switching module and the 3.3V voltage stabilizing module of the power supply module are arranged inside the test base.
The other side of the second mounting groove 32 is also provided with a third mounting groove 33 for inserting and mounting the test indicator lamp 21.
The optical fingerprint testing device suitable for multi-fingerprint testing is convenient for a tester to directly test N fingerprint modules 1, saves time and labor, and also avoids the situations of misjudgment or damage to the fingerprint modules 1 caused by mismatching and miscorrespondence of the testers due to different types of the fingerprint modules 1. In addition, the optical fingerprint testing device is wider in application range, meets the testing environment requirements of testing more fingerprint modules 1, and realizes batch testing.
The foregoing is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the utility model, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present utility model.
Claims (8)
1. An optical fingerprint test circuit suitable for multi-fingerprint testing, comprising:
the fingerprint detection device comprises N fingerprint modules (1) which are used for sensing fingerprint pressing, collecting fingerprint images and generating fingerprint collecting signals, wherein N is a natural number larger than 1;
the communication transfer module is respectively connected with the N fingerprint modules (1) and is used for transmitting fingerprint acquisition signals;
the main control chip is connected with the communication switching module and is used for receiving the fingerprint acquisition signal, identifying the type of the fingerprint module (1) and carrying out fingerprint test processing on the fingerprint acquisition signal;
and the power supply module is connected with the main control chip.
2. The optical fingerprint test circuit for multi-fingerprint test according to claim 1, wherein the communication switching module comprises an I2C expansion module, and the I2C expansion module comprises a main communication interface connected with a main control chip and sub communication interfaces respectively connected with the N fingerprint modules (1).
3. An optical fingerprint test circuit suitable for multi-fingerprint testing according to claim 2, wherein the fingerprint module (1) comprises a pressure detection unit (11), an optical sensor (12) and a fingerprint acquisition chip (13), and the fingerprint acquisition chip (13) is connected with a sub-communication interface.
4. An optical fingerprint test circuit suitable for multi-fingerprint testing according to claim 2, characterized in that the main control chip comprises a chip connection module (2), the chip connection module (2) is connected with a main communication interface, the chip connection module (2) is provided with a seventh pin, and the seventh pin is connected with a test indicator lamp (21).
5. An optical fingerprint test circuit adapted for multi-fingerprint testing according to claim 2, wherein the I2C expansion module is a DFR0576 module or a PCA9548 module.
6. The optical fingerprint test circuit of claim 1, wherein the power supply module comprises a USB power module and a 3.3V voltage regulator module connected to the USB power module.
7. The optical fingerprint test circuit of claim 6, wherein the 3.3V voltage regulator module is an EMP8130 module.
8. The utility model provides an optical fingerprint testing device suitable for many fingerprint tests, includes test base, its characterized in that still including installing on test base and an optical fingerprint test circuit suitable for many fingerprint tests as in any one of claims 1-7, test base top is equipped with testboard (3), set up N on testboard (3) and be used for supplying fingerprint test module male first mounting groove (31), first mounting groove (31) top is equipped with second mounting groove (32) that are used for power module to install, second mounting groove (32) one side is equipped with display screen (34), display screen (34) are connected with the master control chip.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321581712.8U CN220207766U (en) | 2023-06-20 | 2023-06-20 | Optical fingerprint test circuit and device suitable for multi-fingerprint test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321581712.8U CN220207766U (en) | 2023-06-20 | 2023-06-20 | Optical fingerprint test circuit and device suitable for multi-fingerprint test |
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| CN220207766U true CN220207766U (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321581712.8U Active CN220207766U (en) | 2023-06-20 | 2023-06-20 | Optical fingerprint test circuit and device suitable for multi-fingerprint test |
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| Country | Link |
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| CN (1) | CN220207766U (en) |
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- 2023-06-20 CN CN202321581712.8U patent/CN220207766U/en active Active
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