Hall type detection circuit and detection device

Through Hall-type detection circuit and detection device, the stability and durability problems of the wind turbine lubrication pump system in extreme environments are solved, and high-precision, fast response and low-cost detection effects are achieved, which are suitable for harsh environments.

CN223180419UActive Publication Date: 2025-08-01TOFI SENSING TECH (SHANGHAI CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422521673.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-17
Publication Date
2025-08-01
Estimated Expiration
2034-10-17

AI Technical Summary

Technical Problem

The existing monitoring technology of wind turbine lubrication pump system is insufficient in stability and durability in extreme environments, especially in ambient temperature sensitive and costly, and has poor waterproofing and pressure resistance.

Method used

The Hall detection circuit is adopted, including power supply circuit, signal delivery circuit and Hall sensor circuit, and the Hall chip is used to detect the product status, and IP69K is reached through high-strength shell and protection level. Combined with the back magnetic Hall chip and output filter circuit, high precision and rapid response are achieved.

Benefits of technology

Working stably under extreme temperature conditions, high detection accuracy, fast response speed, low cost, strong protection functions and multiple circuit protection capabilities, improving the safety and service life of the detector.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223180419U_ABST
    Figure CN223180419U_ABST
Patent Text Reader

Abstract

The utility model discloses a Hall type detection circuit and a detection device. The Hall type detection circuit comprises a power supply circuit; one end of the power supply circuit is connected with the signal transmission circuit, and the other end is connected with the Hall sensor circuit; the Hall sensor circuit collects signals of a product through a Hall chip and detects whether the product is activated or not, the signal transmission circuit processes the signals of the Hall sensor circuit so as to determine the state of the product, and the power supply circuit is used for supplying power to the product, the signal transmission circuit and the Hall sensor circuit so as to ensure that the product works normally when activated or not activated; the device can work stably under extreme temperature conditions, is high in detection precision, is high in response speed, is low in cost, and is suitable for severe environments such as a lubricant pump system of a wind driven generator. And meanwhile, the detector has a strong protection function and multiple circuit protection capability, so that the safety and the service life of the detector are effectively improved and prolonged.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a Hall detection circuit and a detection device. Background Art

[0002] With the continuous development of wind power generation technology, the stable operation requirements of wind turbines are becoming increasingly strict. Among them, the lubricating pump system is an important part to ensure the stable operation of wind turbines. Therefore, the precise monitoring of the piston in the pump is particularly important.

[0003] Currently, the common monitoring technologies mainly rely on a complex electronic control system combined with optoelectronic sensors for monitoring. However, the existing solutions have problems such as being sensitive to environmental temperature, high cost, or poor waterproof and pressure resistance. As a result, in extreme environments, especially in application scenarios with changing environments such as wind power generation, the stability of the circuit and the durability of the device still need to be improved. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a Hall detection circuit and a detection device are proposed.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions: A Hall detection circuit includes:

[0006] A power supply circuit;

[0007] One end of the power supply circuit is connected to the signal transmission circuit, and the other end is connected to the Hall sensor circuit;

[0008] The Hall sensor circuit collects the signal of the product through a Hall chip to detect whether the product is activated. The signal transmission circuit processes the signal of the Hall sensor circuit to determine the state of the product. The power supply circuit is used to provide power for the product, the signal transmission circuit, and the Hall sensor circuit to ensure normal operation when the product is activated and deactivated.

[0009] As a further description of the above technical solution: The power supply circuit includes: a first triode, the emitter of the first triode is connected to the power input terminal, the collector of the first triode is connected to a first resistor, the other end of the first resistor is connected to the cathode of a first diode, and the cathode of the first diode is connected to the base of the first triode.

[0010] As a further description of the above technical solution: A first capacitor and a second capacitor are connected in parallel between the emitter of the first triode and the anode of the first diode, and one end of the second capacitor is grounded.

[0011] As a further description of the above technical solution: The signal transmission circuit includes: a second resistor, one end of the second resistor is connected to the emitters of the first resistor and the second triode, the other end of the second resistor is connected to the base of the second triode, and the collector of the second triode is grounded.

[0012] As a further description of the above technical solution: A third capacitor is connected in parallel between the emitter and the collector of the second triode, one end of the third capacitor is connected to a thermistor, and the other end of the thermistor is connected to the cathode of a second diode.

[0013] As a further description of the above technical solution: The anode of the second diode is connected to a transient voltage suppression diode, the other end of the transient voltage suppression diode is connected to the third capacitor, and the base of the second triode is connected in series with a first light-emitting diode and a second light-emitting diode.

[0014] As a further description of the above technical solution: The Hall sensor circuit includes a Hall chip, the Hall chip is connected to the cathode of the second light-emitting diode, one end of the Hall chip is connected to the power input terminal, and the other end is grounded.

[0015] As a further description of the above technical solution: The Hall sensor circuit further includes a third resistor, the third resistor is connected to the end of the first resistor close to the second resistor, the other end of the third resistor is connected to a fourth resistor, the other end of the fourth resistor is connected to the cathode of the second light-emitting diode and a fourth capacitor, and the other end of the fourth capacitor is grounded.

[0016] As a further description of the above technical solution: The end of the third resistor close to the first resistor is connected to the emitter of a third triode, the base of the third triode is connected to the fourth resistor, and the collector of the third triode is connected to the Hall chip.

[0017] There is also provided a Hall type detection device, which is applicable to the Hall sensor circuit described in any one of the above technical solutions, and includes:

[0018] A housing;

[0019] A volume cavity is formed on the inner side of the housing, and a Hall chip is arranged on the inner side of the housing;

[0020] One end of the Hall chip is connected to a circuit board;

[0021] The other end of the circuit board is provided with a plug.

[0022] The above technical solution has the following advantages or beneficial effects:

[0023] It can work stably under extreme temperature conditions, with high detection accuracy, fast response speed, low cost, and is suitable for harsh environments such as the lubricating pump system of wind turbines; at the same time, it has strong protection functions and multiple circuit protection capabilities, effectively improving the safety and service life of the detector. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the detection circuit proposed by the present utility model;

[0025] Figure 2 It is a schematic structural diagram of the detection device proposed by the present utility model.

[0026] Legend Explanation:

[0027] 1. First triode; 2. First resistor; 3. First diode; 4. First capacitor; 5. Second capacitor; 6. Second resistor; 7. Second triode; 8. Third capacitor; 9. Thermistor; 10. Second diode; 11. Transient voltage suppression diode; 12. First light-emitting diode; 13. Second light-emitting diode; 14. Hall chip; 15. Third resistor; 16. Fourth resistor; 17. Fourth capacitor; 18. Third triode; 19. Housing; 20. Circuit board; 21. Plug. Detailed Embodiment

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] Refer to Figure 1 , an embodiment provided by the present utility model: A Hall-type detection circuit, including: a power supply circuit; one end of the power supply circuit is connected to a signal transmission circuit, and the other end is connected to a Hall sensor circuit; the Hall sensor circuit collects the signal of the product through the Hall chip 14 to detect whether the product is activated, and the signal transmission circuit processes the signal of the Hall sensor circuit to determine the state of the product. The power supply circuit is used to supply power to the product, the signal transmission circuit, and the Hall sensor circuit to ensure normal operation when the product is activated and deactivated.

[0030] In this embodiment, it mainly solves the problem of stably detecting the presence or absence of a magnetically conductive metal piston rod in the lubricating pump system of a wind turbine under extreme temperature environments (-40°C - 8°C), and provides a detection solution with low cost, IP69K waterproof, high response frequency, strong compressive ability, and multiple circuit protection functions.

[0031] The Hall sensor circuit is used to detect the presence of a magnetically permeable metal piston rod; the signal transmission circuit is used to process the signals of the Hall sensor circuit to determine the state of the piston rod, and can be compatible with both NPN and PNP output wiring methods, and has reverse connection protection, short circuit protection and surge protection functions; the power supply circuit is used to stably supply power to the product to ensure normal operation when the product is activated and deactivated. It can work stably under extreme temperature conditions, has high detection accuracy, fast response speed, low cost, and is suitable for harsh environments such as the lubricating pump system of wind turbines; at the same time, it has strong protection functions and multiple circuit protection capabilities, effectively improving the safety and service life of the detector.

[0032] The power supply circuit includes: a first triode 1, the emitter of the first triode 1 is connected to the power input terminal, the collector of the first triode 1 is connected to a first resistor 2, the other end of the first resistor 2 is connected to the cathode of a first diode 3, and the cathode of the first diode 3 is connected to the base of the first triode 1; a first capacitor 4 and a second capacitor 5 are connected in parallel between the emitter of the first triode 1 and the anode of the first diode 3, and one end of the second capacitor 5 is grounded.

[0033] In this embodiment, a linear voltage regulator circuit is jointly formed by the first triode 1, the first resistor 2, the first diode 3, the first capacitor 4 and the second capacitor 5. The first diode 3 is a 5.6V zener diode. When the product is not activated, since the second triode 7 is not conducting, the voltage flowing into the collector of the first triode 1 is about 23V. After linear voltage regulation, the emitter of the first triode 1 outputs a voltage of 5V. When the product is activated, since the second triode 7 is conducting, the voltage flowing into the collector of the first triode 1 is about 2.4V. The linear voltage regulator circuit does not work, and at this time, the power supply for the Hall chip 14 is provided by the third triode 18.

[0034] The signal transmission circuit includes: a second resistor 6, one end of the second resistor 6 is connected to the first resistor 2 and the emitter of the second triode 7, the other end of the second resistor 6 is connected to the base of the second triode 7, and the collector of the second triode 7 is grounded; a third capacitor 8 is connected in parallel between the emitter and the collector of the second triode 7, one end of the third capacitor 8 is connected to a thermistor 9, and the other end of the thermistor 9 is connected to the cathode of a second diode 10; the anode of the second diode 10 is connected to a transient voltage suppression diode 11, the other end of the transient voltage suppression diode 11 is connected to the third capacitor 8, and the base of the second triode 7 is connected in series with a first light-emitting diode 12 and a second light-emitting diode 13.

[0035] In this embodiment, the signal transmission circuit mainly consists of a second diode 10, a transient voltage suppression diode 11 (TVS diode), a thermistor 9, a third capacitor 8, a second triode 7, a second resistor 6, a first light-emitting diode 12, and a second light-emitting diode 13. The second diode 10 is an anti-reverse connection protection diode with a forward conduction voltage drop of 0.2V, thereby reducing the conduction voltage drop of the input circuit. The thermistor 9 plays a role in protecting and limiting the current when the circuit current is greater than 200mA. The transient voltage suppression diode 11 plays a protective role when the circuit is subjected to lightning surges, improving the anti-interference ability of the product. The third capacitor 8 is a power high-frequency filtering capacitor to filter out the clutter in the power supply; the second resistor 6 is a bias resistor. The second triode 7 is an output PNP-type triode, and the first light-emitting diode 12 and the second light-emitting diode 13 are output indicator light-emitting diodes. When the product is activated, the first light-emitting diode 12 and the second light-emitting diode 13 light up and turn on the second triode 7. When the product is not activated, the first light-emitting diode 12 and the second light-emitting diode 13 do not light up and turn off the second triode 7.

[0036] The Hall sensor circuit includes a Hall chip 14. The Hall chip 14 is connected to the cathode of the second light-emitting diode 13. One end of the Hall chip 14 is connected to the power input terminal, and the other end is grounded; the Hall sensor circuit further includes a third resistor 15. The third resistor 15 is connected to the end of the first resistor 2 close to the second resistor 6. The other end of the third resistor 15 is connected to a fourth resistor 16. The other end of the fourth resistor 16 is connected to the cathode of the second light-emitting diode 13 and a fourth capacitor 17. The other end of the fourth capacitor 17 is grounded; the end of the third resistor 15 close to the first resistor 2 is connected to the emitter of a third triode 18. The base of the third triode 18 is connected to the fourth resistor 16, and the collector of the third triode 18 is connected to the Hall chip 14.

[0037] In this embodiment, the Hall sensor circuit mainly consists of a third triode 18, a third resistor 15, a fourth resistor 16, a fourth capacitor 17, and a Hall chip 14; when the product is not activated, the output of the Hall chip 14 is non-conductive, making the base of the third triode 18 at a high level, and the third triode 18 is not conductive at this time; when the product is activated, the output of the Hall chip 14 is conductive, making the output of the fourth resistor 16 at a low level, and the third triode 18 is conductive, directly supplying 2.4V from the power supply terminal to the Hall chip 14 for power supply; the low level of the output terminal of the Hall chip 14 also makes the first light-emitting diode 12 and the second light-emitting diode 13 indicator lights light up, and the reference of the second triode 7 is at a low level and thus conducts.

[0038] Refer to Figure 2, further including an embodiment of a Hall detection device. The detection device is applicable to any Hall sensor circuit in the above technical solutions and includes: a housing 19; a volume cavity is formed inside the housing 19, and a Hall chip 14 is arranged inside the housing 19; one end of the Hall chip 14 is connected to a circuit board 20; a plug 21 is arranged at the other end of the circuit board 20.

[0039] In this embodiment, to improve the compressive resistance and waterproof performance to the IP69K level, the housing 19 is made of an integral high-strength corrosion-resistant 304 stainless steel material; to meet the requirement of a response frequency of 10KHz, a back-magnetic Hall chip is adopted. Combined with an output filter circuit, it can realize the induction of a magnetically conductive object, ensuring real-time response and high-precision detection; the output end of the circuit board 20 adopts a two-wire circuit scheme. Users only need to connect the power supply, and they can use NPN output wiring or PNP wiring, which is more convenient to use; for the convenience of wiring, the plug 21 adopts a standard M12 plug. After being connected to a standard M12 cable, the protection level can reach the IP69K level, improving the durability of the device.

[0040] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A Hall detection circuit, characterized in that, Comprising: A power supply circuit; One end of the power supply circuit is connected to a signal transmission circuit, and the other end is connected to a Hall sensor circuit; The Hall sensor circuit collects signals of the product through a Hall chip (14) to detect whether the product is activated. The signal transmission circuit processes the signals of the Hall sensor circuit to determine the state of the product. The power supply circuit is used to supply power to the product, the signal transmission circuit, and the Hall sensor circuit to ensure normal operation when the product is activated and deactivated.

2. The detection circuit according to claim 1, characterized in that: The power supply circuit includes: a first triode (1), the emitter of the first triode (1) is connected to a power input terminal, the collector of the first triode (1) is connected to a first resistor (2), the other end of the first resistor (2) is connected to the cathode of a first diode (3), and the cathode of the first diode (3) is connected to the base of the first triode (1).

3. The detection circuit according to claim 2, wherein: A first capacitor (4) and a second capacitor (5) are connected in parallel between the emitter of the first triode (1) and the anode of the first diode (3), and one end of the second capacitor (5) is grounded.

4. The detection circuit according to claim 2, wherein: The signal transmission circuit includes: a second resistor (6), one end of the second resistor (6) is connected to the first resistor (2) and the emitter of a second triode (7), the other end of the second resistor (6) is connected to the base of the second triode (7), and the collector of the second triode (7) is grounded.

5. The detection circuit according to claim 4, characterized in that: A third capacitor (8) is connected in parallel between the emitter and the collector of the second triode (7), one end of the third capacitor (8) is connected to a thermistor (9), and the other end of the thermistor (9) is connected to the cathode of a second diode (10).

6. The detection circuit according to claim 5, wherein: The anode of the second diode (10) is connected to a transient voltage suppression diode (11), the other end of the transient voltage suppression diode (11) is connected to the third capacitor (8), and the base of the second triode (7) is connected in series with a first light-emitting diode (12) and a second light-emitting diode (13).

7. The detection circuit according to claim 6, characterized in that: The Hall sensor circuit includes a Hall chip (14), the Hall chip (14) is connected to the cathode of the second light-emitting diode (13), one end of the Hall chip (14) is connected to a power input terminal, and the other end is grounded.

8. The detection circuit according to claim 6, wherein: The Hall sensor circuit further includes a third resistor (15), the third resistor (15) is connected to the end of the first resistor (2) close to the second resistor (6), the other end of the third resistor (15) is connected to a fourth resistor (16), the other end of the fourth resistor (16) is connected to the cathode of the second light-emitting diode (13) and a fourth capacitor (17), and the other end of the fourth capacitor (17) is grounded.

9. The detection circuit according to claim 8, wherein: The end of the third resistor (15) close to the first resistor (2) is connected to the emitter of a third triode (18), the base of the third triode (18) is connected to the fourth resistor (16), and the collector of the third triode (18) is connected to the Hall chip (14).

10. A Hall-type detection device, characterized in that, The detection device is applicable to the Hall sensor circuit according to any one of the above claims 1-9, and includes: A housing (19); A volume cavity is formed inside the housing (19), and a Hall chip (14) is arranged inside the housing (19); One end of the Hall chip (14) is connected to the circuit board (20); A plug (21) is arranged at the other end of the circuit board (20).