Identity recognition device based on hand pyroelectric infrared information

Abstract

The utility model relates to an identity recognition device based on hand pyroelectric infrared information. The identity recognition device comprises a shell, wherein six pyroelectric sensors, a motor assembly, a control module, a motor driving module and a circuit module are fixed in the shell; a pyroelectric signal conditioning circuit in the circuit module is respectively connected with a probe of the pyroelectric sensor and the control module, the control module is connected with the motor driving module, the motor driving module is connected with an asynchronous motor of the motor assembly, an A / D converter is integrated in the control module, and a motor driving circuit of the circuit module is connected with the motor driving module; the asynchronous motor is fixed with the pyroelectric sensor baffle and forms a rotating structure with the motor driving module, and the pyroelectric sensor array and the rotating structure form an infrared information acquisition module. According to the utility model, the probe is intermittently shielded by rotating the baffle plate, the human body infrared information of the hand is acquired by using the pyroelectric infrared sensor to carry out identity recognition, the equipment is small in size, and the production cost is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of identification devices, and in particular relates to an identity identification device based on hand pyroelectric infrared information. Background Art

[0002] With the development of social economy and the improvement of scientific and technological level, information security has received more and more attention, and identity recognition methods have flourished, becoming a hot topic for research by major domestic and foreign institutions. At present, video imaging devices or fingerprint sensors are usually used for identity recognition on the market. However, the recognition technology based on video imaging devices has the defects of high cost and great environmental interference. Although the recognition technology based on fingerprint sensors is low-cost, fingerprint-type biometrics are not only easy to imitate, but also the contact-based information collection method increases the risk of spreading germs, which is not conducive to social health and safety.

[0003] Pyroelectric infrared sensors are widely used in the field of body recognition because of their low power consumption, stable performance and low cost. The sensor can detect the infrared rays radiated by human body movement in the environment and convert them into electrical signals for output. In this way, it can work normally even in poor lighting conditions or without lighting. And it does not need to contact the human body, which largely makes up for the defect of contact biometric technology that is easy to spread germs. Therefore, the sensor is suitable for all-weather human identity recognition systems.

[0004] At present, the known devices using pyroelectric infrared sensors for identification are not convenient to use and cannot be applied to certain places in daily life; and other hand recognition devices are easily interfered by external factors and there is a risk of missing collected features. The prior art discloses a method and device for identity recognition based on time-frequency domain cross-correlation, which performs time-frequency domain correlation calculation on the infrared signal approaching the object and the recorded information template, and then inputs the calculation result into the trained support vector machine for identity recognition and outputs the recognition result. The device structure principle is simple and can realize the collection of infrared information of fingers, but its structure requires the finger to be inserted into the pyroelectric sensor array, which is extremely inconvenient to use. The prior art also discloses a palm-swipe payment method, system, device and storage medium based on a depth camera, which uses a depth camera with a liquid lens for focusing to meet the real-time needs of palm swiping. The liquid lens can quickly adjust the position of the focal plane, and the position of the focal plane to be adjusted is independent of the current position of the focal plane, so that the surface texture of the human hand can be quickly imaged clearly, and the stable palm-swipe payment can be realized. However, due to the interference of external factors, such as sampling equipment contamination, background light brightness, palm print damage and other factors, the collected palm print images are prone to the risk of feature missing.

[0005] Based on this, it is urgent to develop a new type of identity recognition device based on hand pyroelectric infrared information to effectively solve the above problems. Summary of the invention

[0006] The purpose of the utility model is to provide an identity recognition device based on hand pyroelectric infrared information to solve the problems of loss risk in hand feature extraction of existing hand identity recognition devices and inconvenience in using existing human infrared information identity recognition devices.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] An identity recognition device based on hand pyroelectric infrared information comprises a housing 9, a cover plate 12 fixed to the top of the housing 9, and a pyroelectric sensor baffle 10 with a hole in the middle of the cover plate 12 and capable of rotating in the hole of the cover plate 12 under the action of an external force;

[0009] Six pyroelectric sensors, a motor assembly, a control module 5, a motor drive module 7 and a circuit module 8 are fixed in the housing 9; the six pyroelectric sensors form a pyroelectric sensor array surrounding the motor assembly, the probes of the pyroelectric sensors are connected to the pyroelectric signal conditioning circuit in the circuit module 8 through wires, and the pyroelectric signal conditioning circuit is connected to the control module 5 through wires;

[0010] The control module 5 is connected to the motor drive module 7 through a wire, and the motor drive module 7 is connected to the asynchronous motor 2 of the motor assembly through a wire. The control module 5 is integrated with an A / D converter, which can convert the infrared signal of the human hand collected by the pyroelectric sensor array into an AD signal after being processed by the pyroelectric signal conditioning circuit of the circuit module 8; the motor drive circuit of the circuit module 8 is connected to the motor drive module 7 through a wire;

[0011] The asynchronous motor 2 is fixed to the pyroelectric sensor baffle 10 and forms a rotating structure with the motor drive module 7. When the asynchronous motor 2 rotates, it can drive the pyroelectric sensor baffle 10 to rotate and intermittently shield the probe.

[0012] The pyroelectric sensor array and the rotating structure form an infrared information acquisition module, which can collect infrared signals from human hands and perform AD conversion by the control module 5 after being processed by the signal conditioning circuit.

[0013] Furthermore, the cover plate 12 is fixed to the top of the housing 9 by four screws. A circular hole is opened in the middle of the cover plate 12 , into which the circular pyroelectric sensor baffle 10 can be embedded. A gap is left between the pyroelectric sensor baffle 10 and the cover plate 12 .

[0014] Furthermore, six circular through holes 11 are formed on the pyroelectric sensor baffle 10 , and a slot is formed at the bottom of the pyroelectric sensor baffle 10 , which can be fixedly connected to the top of the asynchronous motor 2 .

[0015] Furthermore, the pyroelectric sensor comprises a pyroelectric sensor base 1 which is integrally formed with the housing 9 , and a pyroelectric infrared probe is mounted on the top of the pyroelectric sensor base 1 .

[0016] Furthermore, the housing 9 is in the shape of a rectangular box, and a rectangular wiring port 6 is provided on one side wall thereof. The external power supply part can be connected to the infrared information acquisition module, the control module 5, the circuit module 8 and the motor drive module 7 respectively through the wiring port 6 to supply power to them.

[0017] Furthermore, the probe is fixed on the pyroelectric sensor base 1 by glue or binding tape.

[0018] Furthermore, the motor assembly also includes a motor fixing cover plate 3 and a motor fixing seat 4. The motor fixing cover plate 3 and the motor fixing seat 4 are connected by four screws to form a box structure, and the asynchronous motor 2 is fixed therein. The motor fixing seat 4 and the outer shell 9 are integrally formed.

[0019] Furthermore, the circuit module 8 includes a motor drive circuit and a pyroelectric signal conditioning circuit, and the two circuits are integrated on a circuit board.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The utility model is provided with a rotating baffle mechanism, which intermittently blocks the pyroelectric infrared probe by the rotating baffle to collect dynamic infrared signals so that the device has the ability to collect infrared information of static hands; by using the pyroelectric infrared sensor to collect human infrared information of the hand for identity recognition, the size of the device is greatly reduced, the device is simplified, and the production cost is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The main structure of the identity recognition device based on the pyroelectric infrared information of the hand;

[0024] Figure 2 The main structure of the hand pyroelectric infrared acquisition device;

[0025] Figure 3 The structure of the pyroelectric sensor array;

[0026] Figure 4 A three-dimensional diagram of an identity recognition device based on pyroelectric infrared information of the hand.

[0027] In the figure: 1. Pyroelectric sensor base 2. Asynchronous motor 3. Motor fixing cover 4. Motor fixing base 5. Control module 6. Wiring port 7. Motor drive module 8. Circuit module 9. Housing 10. Pyroelectric sensor baffle 11. Through hole 12. Cover. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with embodiments:

[0029] The utility model is an identity recognition device based on hand pyroelectric infrared information, comprising a housing 9, a pyroelectric sensor baffle 10 and a cover plate 12. The cover plate 12 is fixed to the top of the housing 9 by four screws, and a circular hole is opened in the middle of the cover plate 12, into which the circular pyroelectric sensor baffle 10 can be embedded, and a certain gap is left between the pyroelectric sensor baffle 10 and the cover plate 12, so that the pyroelectric sensor baffle 10 can rotate in the circular hole of the cover plate 12 under the action of external force.

[0030] Specifically, the housing 9 is in the shape of a rectangular box, and a rectangular wiring port 6 is provided on one side wall thereof.

[0031] like Figure 2 As shown, a plurality of pyroelectric sensors, a motor assembly, a control module 5, a motor drive module 7 and a circuit module 8 are fixed in the housing 9. In the present utility model, there are six pyroelectric sensors.

[0032] Among them, 6 pyroelectric sensors form a pyroelectric sensor array, which surrounds the periphery of the motor assembly. Specifically, the pyroelectric sensor includes a pyroelectric sensor base 1, which is integrally formed with the housing 9. A pyroelectric infrared probe is installed on the top of the pyroelectric sensor base 1, and the probe is fixed to the pyroelectric sensor base 1 by glue or a strap. The signal conditioning circuit of the pyroelectric sensor is connected to the control module 5 and the 6 pyroelectric infrared probes through wires respectively. The motor assembly is composed of an asynchronous motor 2, a motor fixing cover plate 3 and a motor fixing seat 4. The motor fixing cover plate 3 and the motor fixing seat 4 are connected to each other by 4 screws to form a box structure, and the asynchronous motor 2 is fixed therein. Among them, the motor fixing seat 4 is integrally formed with the housing 9.

[0033] The control module 5 is connected to the motor drive module 7 through a wire, and the motor drive module 7 is connected to the asynchronous motor 2 through a wire. The control module 5 is integrated with an A / D converter, which can convert the infrared signal of the human hand collected by the pyroelectric sensor array into an AD signal after being processed by the signal conditioning circuit. The control module 5 sends control instruction information to the motor drive module 7, and the motor drive module 7 controls the asynchronous motor 2 to rotate according to the control instruction. The control module 5 is also connected to an external relay, an unlocking module, and a storage module through a wiring port 6.

[0034] The circuit module 8 includes a motor drive circuit and a pyroelectric signal conditioning circuit, and the two circuits are integrated on a circuit board. The circuit module 8 is connected to the control module 5 through a wire. The pyroelectric signal conditioning circuit in the circuit module 8 is a signal conditioning circuit of a pyroelectric sensor, which is connected to 6 pyroelectric infrared probes through a wire. The signal conditioning circuit of the pyroelectric sensor is also connected to the control module 5 through a wire. The motor drive circuit in the circuit module 8 is connected to the motor drive module 7 through a wire.

[0035] The pyroelectric sensor baffle 10 has six circular through holes 11, and a slot is formed at the bottom of the pyroelectric sensor baffle 10, which can be fixedly connected with the top of the asynchronous motor 2 and form a rotating structure with the motor drive module 7. When the asynchronous motor 2 rotates, the pyroelectric sensor baffle 10 can be driven to rotate.

[0036] In the utility model, the pyroelectric sensor array and the rotating structure form an infrared information acquisition module, which can realize intermittent shielding of the pyroelectric infrared probe to collect dynamic infrared signals, so that the recognition device has the ability to collect infrared information of a stationary hand.

[0037] In the utility model, the pyroelectric sensor baffle 10 is rotated to intermittently block the pyroelectric infrared probe on the pyroelectric sensor array to collect dynamic infrared signals, so that the device has the ability to collect infrared information of static hands. The infrared information collection module is responsible for collecting infrared information of the human body, and the collected information is transmitted to the control module 5 for subsequent use in opening the intelligent access control lock.

[0038] The external power supply part is respectively connected to the infrared information acquisition module, the control module 5, the circuit module 8 and the motor drive module 7 via the wiring port 6 to supply power to them.

[0039] Example 1

[0040] like Figure 2 As shown, an identity recognition device based on hand pyroelectric infrared information includes a motor component, a pyroelectric sensor array, a control module 5, a motor drive module 7 and a circuit module 8.

[0041] The motor assembly is composed of an asynchronous motor 2, a motor fixing cover plate 3 and a motor fixing seat 4. The motor fixing cover plate 3 and the motor fixing seat 4 are connected by four screws to form a box structure, in which the asynchronous motor 2 is fixed, and the motor fixing seat 4 and the housing 9 are integrally formed.

[0042] The circuit module 8 includes a motor driving circuit and a pyroelectric signal conditioning circuit of the pyroelectric sensor 1 , and the two circuits are integrated on a circuit board.

[0043] The pyroelectric sensor array is composed of 6 pyroelectric sensors, which surround the motor assembly. The pyroelectric sensor includes a pyroelectric sensor base 1 integrally formed with the housing 9, and a pyroelectric infrared probe is mounted on the top of the pyroelectric sensor base 1, which is fixed to the pyroelectric sensor base 1 by glue or a strap. The signal conditioning circuit of the pyroelectric sensor is connected to the control module 5 and the 6 pyroelectric infrared probes by wires.

[0044] The housing 9 is in the shape of a rectangular box, and the six pyroelectric sensors, the motor assembly, the control module 5, the motor drive module 7 and the circuit module 8 are fixed in the housing 9. The top cover plate 12 is fixed to the top of the housing 9 by four screws, and a circular hole is opened in the middle of the cover plate 12, and a circular pyroelectric sensor baffle 10 can be embedded. There is a certain gap between the pyroelectric sensor baffle 10 and the cover plate 12, so that the pyroelectric sensor baffle 10 can rotate in the circular hole of the cover plate 12 under the action of external force.

[0045] The pyroelectric sensor baffle 10 is a circular disk, and is provided with 6 circular through holes 11, so that the pyroelectric probe can completely collect the infrared signal of the hand.

[0046] A rectangular wiring port 6 is provided on the left side wall of the housing 9 to connect to an external power source and perform output operations. For example, the control module 5 is connected to an external relay, an unlocking module, a storage module, a control gate switch, etc. through the wiring port 6. Since the external relay, the unlocking module, the storage module, etc. are conventional structures, and the present utility model does not protect their structures and uses, they are not described in detail here.

[0047] The external power supply part is respectively connected to the infrared information acquisition module, the control module 5, the circuit module 8 and the motor drive module 7 via the wiring port 6 to supply power to them.

[0048] The control module 5 is integrated with an A / D converter, which can convert the infrared signal of the human hand collected by the pyroelectric sensor array into an AD signal after being processed by the signal conditioning circuit. Specifically, after the infrared signal of the human hand is collected by the pyroelectric infrared probe, it is processed by the signal conditioning circuit and then transmitted to the A / D converter for AD conversion.

[0049] The control module 5 is connected to the motor drive module 7 via a wire and sends control instruction information to the motor drive module 7. The motor drive module 7 is connected to the asynchronous motor 2 via a wire and controls the asynchronous motor 2 to rotate according to the control instruction.

[0050] In this embodiment, the asynchronous motor 2, the motor drive module 7 and the pyroelectric sensor baffle 10 form a rotating structure. The pyroelectric sensor baffle 10 is provided with 6 circular through holes 11, and the bottom of the pyroelectric sensor baffle 10 is provided with a card slot, which can be fixedly connected with the top of the asynchronous motor 2. When the asynchronous motor 2 rotates, the pyroelectric sensor baffle 10 can be driven to rotate, so that the baffle intermittently blocks the probe installed on the pyroelectric infrared probe array base 1 to collect dynamic infrared signals.

[0051] In this embodiment, the infrared information collection module is composed of a pyroelectric sensor array and a rotating structure, which can intermittently block the pyroelectric infrared probe to collect dynamic infrared signals, so that the recognition device has the ability to collect infrared information of static hands. Figure 3 As shown, by rotating the pyroelectric sensor baffle 10 to intermittently block the pyroelectric infrared probe on the pyroelectric sensor array to collect dynamic infrared signals, the device has the ability to collect infrared information of stationary hands. The infrared information collection module is responsible for collecting infrared information of the human body, and the collected information is processed by the control module 5 and stored in the storage module. The control module 5 directly issues instructions to the external door prohibition drive circuit.

[0052] The motor drive circuit of the circuit module 8 is connected to the motor drive module 7 via a wire. In addition, the motor drive circuit is also connected to a relay and a drive unlocking module. The external power supply circuit can supply power to the infrared information acquisition module, the control module 5, the access control drive circuit, the relay and the unlocking module respectively. The storage of the above-mentioned human infrared information, the control of the external access control drive circuit by the control module 5, the connection of the drive circuit to the relay through a wire, the drive unlocking module, and the external power supply circuit supplying power to the access control drive circuit, the relay and the unlocking module are all common technologies in the prior art and have nothing to do with the protection content of this device. The present utility model does not protect some of the above-mentioned structures, connections, etc., and will not be repeated here.

[0053] In this embodiment, the control module 5 can be any one of a single-chip microcomputer, a DSP, an FPGA, and a CPU, or can identify whether an approaching object is a target object based on a correlation algorithm and a classifier. These are prior arts and are not the focus of protection of the present utility model. The control module 5 can control the infrared information acquisition module to perform parallel multi-channel signal extraction on the hand of the target object, and add the extracted signals to the infrared information library of the storage module after processing; the control module 5 can also control the infrared information acquisition module to perform parallel multi-channel signal extraction on the hand of the approaching object, and process the extracted signals and hand them over to the control device for the next step of identity recognition. This part of the content is not the content protected by the present utility model, and will not be elaborated here.

[0054] The utility model collects dynamic human infrared information by intermittently shielding the pyroelectric infrared probe, solves the problem that the pyroelectric infrared human body detection device cannot function on a static human body, and reduces the product volume and cost at the same time.

[0055] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An identity recognition device based on hand pyroelectric infrared information, characterized in that: It comprises a housing (9), a cover plate (12) fixed to the top of the housing (9), and a pyroelectric sensor baffle (10) which is located in the middle of the cover plate (12) and can rotate in the hole of the cover plate (12) under the action of an external force; Six pyroelectric sensors, a motor assembly, a control module (5), a motor drive module (7) and a circuit module (8) are fixed in the housing (9); the six pyroelectric sensors form a pyroelectric sensor array surrounding the motor assembly, the probes of the pyroelectric sensors are connected to the pyroelectric signal conditioning circuit in the circuit module (8) via wires, and the pyroelectric signal conditioning circuit is connected to the control module (5) via wires; The control module (5) is connected to the motor drive module (7) via a wire, and the motor drive module (7) is connected to the asynchronous motor (2) of the motor assembly via a wire. The control module (5) is integrated with an A / D converter, which can convert the infrared signal of the human hand collected by the pyroelectric sensor array into an AD signal after being processed by the pyroelectric signal conditioning circuit of the circuit module (8); the motor drive circuit of the circuit module (8) is connected to the motor drive module (7) via a wire; The asynchronous motor (2) is fixed to the pyroelectric sensor baffle (10) and forms a rotating structure with the motor drive module (7). When the asynchronous motor (2) rotates, it can drive the pyroelectric sensor baffle (10) to rotate, thereby intermittently shielding the probe. The pyroelectric sensor array and the rotating structure form an infrared information acquisition module, which can collect infrared signals from human hands and perform AD conversion after being processed by a signal conditioning circuit by a control module (5).

2. The identity recognition device based on hand pyroelectric infrared information according to claim 1, characterized in that: The cover plate (12) is fixed to the top of the housing (9) by means of four screws. A circular hole is provided in the middle of the cover plate (12) into which a circular pyroelectric sensor baffle (10) can be embedded. A gap is left between the pyroelectric sensor baffle (10) and the cover plate (12).

3. The identity recognition device based on hand pyroelectric infrared information according to claim 2, characterized in that: The pyroelectric sensor baffle (10) is provided with six circular through holes (11), and the bottom of the pyroelectric sensor baffle (10) is provided with a slot capable of being clamped and fixed to the top of the asynchronous motor (2).

4. The identity recognition device based on hand pyroelectric infrared information according to claim 1, characterized in that: The pyroelectric sensor comprises a pyroelectric sensor base (1) which is integrally formed with a housing (9), and a pyroelectric infrared probe is mounted on the top of the pyroelectric sensor base (1).

5. The identity recognition device based on hand pyroelectric infrared information according to claim 1, characterized in that: The housing (9) is in the shape of a rectangular box, and a rectangular wiring port (6) is provided on one side wall thereof. The external power supply part can be connected to the infrared information acquisition module, the control module (5), the circuit module (8) and the motor drive module (7) respectively through the wiring port (6) to supply power to them.

6. The identity recognition device based on hand pyroelectric infrared information according to claim 1, characterized in that: The probe is fixed on the pyroelectric sensor base (1) by glue or binding tape.

7. The identity recognition device based on hand pyroelectric infrared information according to claim 1, characterized in that: The motor assembly further comprises a motor fixing cover plate (3) and a motor fixing seat (4); the motor fixing cover plate (3) and the motor fixing seat (4) are connected by four screws to form a box structure, in which the asynchronous motor (2) is fixed; the motor fixing seat (4) and the housing (9) are integrally formed.

8. The identity recognition device based on hand pyroelectric infrared information according to claim 1, characterized in that: The circuit module (8) comprises a motor drive circuit and a pyroelectric signal conditioning circuit, and the two circuits are integrated on a circuit board.

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