CN212872612U - Current sampling system and current sampling device - Google Patents
Current sampling system and current sampling device Download PDFInfo
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- CN212872612U CN212872612U CN202021766619.0U CN202021766619U CN212872612U CN 212872612 U CN212872612 U CN 212872612U CN 202021766619 U CN202021766619 U CN 202021766619U CN 212872612 U CN212872612 U CN 212872612U
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Abstract
The utility model provides a current sampling system and a current sampling device, wherein the current sampling system comprises a first Hall sensor and a second Hall sensor which are reversely connected; the input end of the Hall sensor group is connected with a circuit to be tested, the first output end of the Hall sensor group is connected with the input end of the operation storage module, and the output end of the operation storage module is connected with the first input end of the control module. Therefore, the first Hall sensor and the second Hall sensor in the Hall sensor group are reversely connected, so that the influence of the Hall sensors in the Hall sensor group caused by temperature drift is reduced, and the accuracy of the sampling result of the current sampling system is improved.
Description
Technical Field
The utility model relates to a circuit technical field especially relates to a current sampling system and current sampling device.
Background
With the progress of the human society, automatic control has been extended to various fields. As a main detection link of an automatic control system, sensor technology is rapidly developed. The Hall sensor is a typical detection device, utilizes magnetic sensitivity to detect, has the characteristics of short response time, high precision and the like, and is particularly suitable for monitoring large-current signals.
Because of the above-described characteristics of hall sensors, hall sensors are typically provided on current sampling systems. At present, the precision of Hall sensors on the market is generally 1.0 grade and rarely reaches 0.5 grade, and the main reason influencing the precision is temperature drift. On the premise that the Hall sensor has the temperature drift problem, the sampling result of the current sampling system is inaccurate. The existing Hall sensor can not well solve the influence of temperature drift on the Hall sensor, so that the Hall sensor and a current sampling system which can solve the problem of temperature drift must be designed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a current sampling system and current sampling device, the utility model discloses aim at solving the influence of the unable fine reduction temperature drift of hall sensor among the current sampling system, and then lead to the unsafe problem of current sampling result.
In order to achieve the above object, the present invention provides a current sampling system, which comprises a hall sensor group, an operation storage module and a control module;
the Hall sensor group comprises a first Hall sensor and a second Hall sensor, and the first Hall sensor and the second Hall sensor are reversely connected; the input end of the Hall sensor group is connected with a circuit to be tested, the first output end of the Hall sensor group is connected with the input end of the operation storage module, and the output end of the operation storage module is connected with the first input end of the control module;
the Hall sensor group is used for sending a corresponding first electric signal to the operation storage module according to the current of the circuit to be tested;
the operation storage module is used for storing the first electric signal and sending the first electric signal to the control module;
and the control module is used for determining the current value of the circuit to be tested according to the first electric signal.
Optionally, the current sampling system further includes a temperature detection module;
the input end of the temperature detection module is connected with the second output end of the Hall sensor group, and the output end of the temperature detection module is connected with the second input end of the control module;
and the temperature detection module is used for detecting the temperature of the Hall sensor group and sending a corresponding second electric signal to the control module.
Optionally, the current sampling system further includes a signal amplification module;
the input end of the signal amplification module is connected with the output end of the temperature detection module, and the output end of the signal amplification module is connected with the second input end of the control module;
the signal amplification module is used for amplifying the second electric signal and sending the amplified second electric signal to the control module.
Optionally, the operation storage module includes a first resistor, a second resistor, a third resistor, a fourth resistor, and an operational amplifier;
the first end of the first resistor and the first end of the second resistor are connected with the Hall sensor group, and the second end of the first resistor and the second end of the second resistor are connected with the inverting input end of the operational amplifier;
the first end of the third resistor and the first end of the fourth resistor are connected with the Hall sensor group, and the second end of the third resistor and the second end of the fourth resistor are connected with the non-inverting input end of the operational amplifier.
Optionally, the operation storage module further includes a zeroing circuit;
the first end of the zero setting circuit is connected with the inverting input end of the operational amplifier, and the second end of the zero setting circuit is connected with the non-inverting input end of the operational amplifier.
Optionally, the temperature detection module includes a detection element, a fifth resistor and a sixth resistor;
the first end of the fifth resistor is externally connected with a power supply, and the second end of the fifth resistor is grounded;
the first end of the sixth resistor is externally connected with a power supply, the second end of the sixth resistor is connected with the first end of the detection element, and the second end of the detection element is respectively connected with the Hall sensor group and the power supply.
Optionally, the temperature detection module further includes a capacitor, a first end of the capacitor is connected to the second end of the fifth resistor, and a second end of the capacitor is grounded.
Optionally, the detection element is a thermistor.
Optionally, the current sampling system includes at least 2 temperature detection modules.
The scheme of the application provides a current sampling system and a current sampling device, wherein the current sampling system comprises a first Hall sensor and a second Hall sensor which are reversely connected; the input end of the Hall sensor group is connected with a circuit to be tested, the first output end of the Hall sensor group is connected with the input end of the operation storage module, and the output end of the operation storage module is connected with the first input end of the control module. The Hall sensor group is used for sending a corresponding first electric signal to the operation storage module according to the current of the circuit to be tested; the operation storage module is used for storing the first electric signal and sending the first electric signal to the control module; and the control module is used for determining the current value of the circuit to be tested according to the first electric signal. Therefore, the first Hall sensor and the second Hall sensor in the Hall sensor group are reversely connected, so that the influence of the Hall sensors in the Hall sensor group caused by temperature drift is reduced, and the accuracy of the sampling result of the current sampling system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a circuit structure diagram of a current sampling system provided by the present invention;
fig. 2 is a circuit structure diagram of the hall sensor group provided by the present invention;
fig. 3 is a specific circuit structure diagram of the current sampling system provided by the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Hall sensor group | R3 | |
| 20 | Operation storage module | R4 | |
| 30 | Control module | R5 | |
| 40 | Temperature detection module | R6 | |
| 50 | Signal amplification module | 21 | |
| 11 | First Hall sensor | 22 | |
| 12 | |
41 | Detection element |
| R1 | A first resistor | C1 | Capacitor with a capacitor element |
| R2 | Second resistance |
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, in order to achieve the above object, the present invention provides a current sampling system, which includes a hall sensor group 10, an operation storage module 20 and a control module 30; the hall sensor group 10 comprises a first hall sensor 11 and a second hall sensor 12, and the first hall sensor 11 and the second hall sensor 12 are reversely connected; the input end of the hall sensor group 10 is connected with the circuit to be tested, the first output end of the hall sensor group 10 is connected with the input end of the operation storage module 20, and the output end of the operation storage module 20 is connected with the first input end of the control module 30.
In this embodiment, the hall sensor group 10 is configured to send a corresponding first electrical signal to the operation storage module 20 according to a current of a circuit to be tested; the operation storage module 20 is used for storing the first electric signal and sending the first electric signal to the control module 30; and the control module 30 is used for determining the current value of the circuit to be tested according to the first electric signal.
Please refer to fig. 2, which is shown, wherein I0Is the current in the Hall sensor group 10, I1Is the current of the first Hall sensor 11, I2For the current of the second hall sensor 12, which can be taken from fig. 2, I1And I2The current direction of (2) is opposite. In the present embodiment, the first hall sensor 11 and the second hall sensor 12 are configured as identical hall sensors, so that the 2 hall sensors in the hall sensor group 10 utilize the positive and negative directions to superimpose the temperature drift value, thereby reducing the influence caused by the temperature drift. Therefore, the first electric signal received by the control module is not interfered by temperature drift, and the accuracy of the sampling result of the current sampling system is further improved.
Further, with continued reference to fig. 1, the current sampling system further includes a temperature detection module 40; the input end of the temperature detection module 40 is connected to the second output end of the hall sensor group 10, and the output end of the temperature detection module 40 is connected to the second input end of the control module 30. The current sampling system further comprises a signal amplification module 50; the input end of the signal amplification module 50 is connected to the output end of the temperature detection module 40, and the output end of the signal amplification module 50 is connected to the second input end of the control module 30;
the temperature detecting module 40 in this embodiment is configured to detect a temperature of the hall sensor group 10, and send a corresponding second electrical signal to the control module 30. The signal amplifying module 50 in this embodiment is configured to amplify the second electrical signal and send the amplified second electrical signal to the control module 30. In this way, the temperature of the hall sensor group 10 is detected by the temperature detection module 40, a second electrical signal is generated, and after the second electrical signal is amplified by the signal amplification module 50, the amplified second electrical signal is sent to the control module 30. Therefore, when the second electrical signal is higher than the preset threshold, the control module 30 determines that the temperature of the hall sensor group 10 is too high, and controls the current sampling system to stop working, so as to prevent the hall sensor group 10 from being damaged due to the over-temperature.
Further, referring to fig. 3, the operation storage module 20 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and an operational amplifier 21; a first end of the first resistor R1 and a first end of the second resistor R2 are connected with the Hall sensor group 10, and a second end of the first resistor R1 and a second end of the second resistor R2 are connected with the inverting input end of the operational amplifier 21; the first end of the third resistor R3 and the first end of the fourth resistor R4 are connected with the Hall sensor group 10, and the second end of the third resistor R3 and the second end of the fourth resistor R4 are connected with the non-inverting input end of the operational amplifier 21.
Further, the operation storage module 20 further includes a zeroing circuit 22; a first terminal of the zeroing circuit 22 is connected to the inverting input terminal of the operational amplifier 21, and a second terminal of the zeroing circuit 22 is connected to the non-inverting input terminal of the operational amplifier 21. The zeroing circuit 22 may be any conventional zeroing circuit 22 as long as it can reduce the output error of the operational amplifier 21.
The operation storage module 20 is configured in the above manner, so that the operation storage module 20 can store the first electrical signal and send the first electrical signal to the control module 30.
Further, with reference to fig. 3, the temperature detecting module 40 includes a detecting element 41, a fifth resistor R5 and a sixth resistor R6; a first end of the fifth resistor R5 is externally connected with a power supply, and a second end of the fifth resistor R5 is grounded; the first end of the sixth resistor R6 is externally connected to a power supply, the second end of the sixth resistor R6 is connected to the first end of the detection element, and the second end of the detection element 41 is connected to the hall sensor group 10 and the power supply, respectively, wherein the detection element 41 may be a thermistor.
Furthermore, the temperature detection module further comprises a capacitor C1, a first end of the capacitor C1 is connected to a second end of the fifth resistor R5, and a second end of the capacitor C1 is grounded.
In this embodiment, 2 temperature detection modules 40 may be provided, that is, one temperature detection module 40 may be provided to detect the temperature of the first hall sensor 11 in the hall sensor group 10, and another temperature detection module 40 is provided to detect the temperature of the second hall sensor 12 in the hall sensor group. Of course, only one temperature detection module 40 may be provided, and the average temperature of the first hall sensor 11 and the second hall sensor 12 may be determined as the temperature of the hall sensor group 10.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (10)
1. A current sampling system, characterized by: the device comprises a Hall sensor group, an operation storage module and a control module;
the Hall sensor group comprises a first Hall sensor and a second Hall sensor, and the first Hall sensor and the second Hall sensor are reversely connected; the input end of the Hall sensor group is connected with a circuit to be tested, the first output end of the Hall sensor group is connected with the input end of the operation storage module, and the output end of the operation storage module is connected with the first input end of the control module;
the Hall sensor group is used for sending a corresponding first electric signal to the operation storage module according to the current of the circuit to be tested;
the operation storage module is used for storing the first electric signal and sending the first electric signal to the control module;
and the control module is used for determining the current value of the circuit to be tested according to the first electric signal.
2. The current sampling system of claim 1, further comprising a temperature detection module;
the input end of the temperature detection module is connected with the second output end of the Hall sensor group, and the output end of the temperature detection module is connected with the second input end of the control module;
and the temperature detection module is used for detecting the temperature of the Hall sensor group and sending a corresponding second electric signal to the control module.
3. The current sampling system of claim 2, further comprising a signal amplification module;
the input end of the signal amplification module is connected with the output end of the temperature detection module, and the output end of the signal amplification module is connected with the second input end of the control module;
the signal amplification module is used for amplifying the second electric signal and sending the amplified second electric signal to the control module.
4. The current sampling system of claim 1, wherein the operational storage module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, and an operational amplifier;
the first end of the first resistor and the first end of the second resistor are connected with the Hall sensor group, and the second end of the first resistor and the second end of the second resistor are connected with the inverting input end of the operational amplifier;
the first end of the third resistor and the first end of the fourth resistor are connected with the Hall sensor group, and the second end of the third resistor and the second end of the fourth resistor are connected with the non-inverting input end of the operational amplifier.
5. The current sampling system of claim 4, wherein the operational storage module further comprises a zeroing circuit;
the first end of the zero setting circuit is connected with the inverting input end of the operational amplifier, and the second end of the zero setting circuit is connected with the non-inverting input end of the operational amplifier.
6. The current sampling system of claim 2, wherein the temperature detection module comprises a detection element, a fifth resistor, and a sixth resistor;
the first end of the fifth resistor is externally connected with a power supply, and the second end of the fifth resistor is grounded;
the first end of the sixth resistor is externally connected with a power supply, the second end of the sixth resistor is connected with the first end of the detection element, and the second end of the detection element is respectively connected with the Hall sensor group and the power supply.
7. The current sampling system of claim 6, wherein the temperature detection module further comprises a capacitor, a first end of the capacitor is connected to a second end of the fifth resistor, and a second end of the capacitor is grounded.
8. The current sampling system of any one of claims 6-7, wherein the sensing element is a thermistor.
9. The current sampling system of claim 2, wherein the current sampling system comprises at least 2 temperature detection modules.
10. A current sampling device, characterized in that the current sampling device comprises a current sampling system according to any one of claims 1 to 9, wherein the current sampling system comprises a hall sensor group, an operation storage module and a control module; the Hall sensor group comprises a first Hall sensor and a second Hall sensor, and the first Hall sensor and the second Hall sensor are reversely connected; the input end of the Hall sensor group is connected with a circuit to be tested, the first output end of the Hall sensor group is connected with the input end of the operation storage module, and the output end of the operation storage module is connected with the first input end of the control module.
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| CN202021766619.0U CN212872612U (en) | 2020-08-21 | 2020-08-21 | Current sampling system and current sampling device |
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| CN202021766619.0U CN212872612U (en) | 2020-08-21 | 2020-08-21 | Current sampling system and current sampling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391208A (en) * | 2021-05-27 | 2021-09-14 | 浙江南都电源动力股份有限公司 | Needling test method of lithium battery pack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391208A (en) * | 2021-05-27 | 2021-09-14 | 浙江南都电源动力股份有限公司 | Needling test method of lithium battery pack |
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Effective date of registration: 20230925 Address after: 410000 Rooms 102 and 103, Torch City, Yinpenling Street, Yuelu District, Changsha City, Hunan Province Patentee after: CHANGSHA UNITED ELECTRIC TECH Address before: 410000 rooms 1012 and 1013, building 5, shengdaze Xicheng, 158 Yuelu Avenue, yinpenling street, Yuelu District, Changsha City, Hunan Province (cluster registration) Patentee before: Changsha Yirui Electronic Technology Co.,Ltd. |