CN217443440U - Current acquisition circuit and device - Google Patents
Current acquisition circuit and device Download PDFInfo
- Publication number
- CN217443440U CN217443440U CN202221055008.4U CN202221055008U CN217443440U CN 217443440 U CN217443440 U CN 217443440U CN 202221055008 U CN202221055008 U CN 202221055008U CN 217443440 U CN217443440 U CN 217443440U
- Authority
- CN
- China
- Prior art keywords
- circuit
- analog
- digital conversion
- signal
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a current acquisition circuit and a device, which comprises a microprocessor, a digital-to-analog conversion circuit, a Hall sensor and an analog-to-digital conversion circuit; the detection end of the Hall sensor is arranged in the detected loop, and the output end of the Hall sensor is electrically connected with the input end of the analog-to-digital conversion circuit; the Hall sensor is used for detecting a current detection signal of the detected loop and outputting a voltage detection signal to the analog-to-digital conversion circuit according to the current detection signal; the signal detection end of the microprocessor is in communication connection with the output end of the analog-to-digital conversion circuit, the signal receiving end of the microprocessor is in communication connection with the upper computer, the control signal output end of the microprocessor is in communication connection with the input end of the digital-to-analog conversion circuit, the output end of the digital-to-analog conversion circuit is in electrical connection with the range setting end of the Hall sensor, the current acquisition circuit can achieve isolation detection of current signals in a detected loop, the range is wide, the precision is high, and the circuit principle is simple and easy to achieve.
Description
Technical Field
The utility model relates to a signal acquisition technical field especially relates to a current acquisition circuit and device.
Background
In the current measurement scheme, a sampling resistor is generally connected in series in a measurement loop to acquire a current signal of a measured loop.
Adopt the mode of sampling resistor collection electric current, can be generally with MCU and measurement return circuit in order to reach the simple purpose of circuit altogether, the isolation between detection circuitry and the measured return circuit is relatively poor, and when the resistance of sampling resistor was too big, the consumption that its resistance produced is great, the temperature rise of resistance also can be great, lead to the great influence measurement accuracy of resistance deviation, and sampling resistor is less, it is also comparatively difficult to the sampling of small-signal, make the detection to the electric current have the limitation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a current acquisition circuit and device to realize the higher current detection device of isolation and precision.
According to the utility model discloses an aspect provides a current acquisition circuit, include: the device comprises a microprocessor, a digital-to-analog conversion circuit, a Hall sensor and an analog-to-digital conversion circuit;
the detection end of the Hall sensor is arranged in a detected loop, and the output end of the Hall sensor is electrically connected with the input end of the analog-to-digital conversion circuit; the Hall sensor is used for detecting a current detection signal of the detected loop and outputting a voltage detection signal to the analog-to-digital conversion circuit according to the current detection signal;
the signal detection end of the microprocessor is in communication connection with the output end of the analog-to-digital conversion circuit, the signal receiving end of the microprocessor is in communication connection with an upper computer, the control signal output end of the microprocessor is in communication connection with the input end of the digital-to-analog conversion circuit, and the output end of the digital-to-analog conversion circuit is electrically connected with the range setting end of the Hall sensor.
Optionally, the analog-to-digital conversion circuit includes: the differential input circuit and the analog-to-digital conversion chip; the output end of the Hall sensor comprises a detection signal output end and a reference signal output end,
a first input end of the differential input circuit is electrically connected with the detection signal output end, and a second input end of the differential input circuit is electrically connected with the reference signal output end;
a first output end of the differential input circuit is electrically connected with a first differential signal input end of the analog-to-digital conversion chip, and a second output end of the differential input circuit is electrically connected with a second differential signal input end of the analog-to-digital conversion chip;
and the output end of the analog-to-digital conversion chip is in communication connection with the signal detection end of the microprocessor.
Optionally, the differential input circuit includes: the circuit comprises a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor;
the first resistor is electrically connected between the detection signal output end of the Hall current sensor and the first differential signal input end of the analog-to-digital conversion chip;
the second resistor is electrically connected between the reference signal output end of the Hall current sensor and the second differential signal input end of the analog-to-digital conversion chip;
the first differential signal input end is grounded through the first capacitor, the second differential signal input end is grounded through the second capacitor, and the first differential signal input end and the second differential signal input end are also electrically connected through the third capacitor.
Optionally, the microprocessor includes an analog-to-digital conversion control end;
the analog-to-digital conversion control end is in communication connection with the control end of the analog-to-digital conversion chip.
Optionally, the current collecting circuit further includes: a communication module;
and the microprocessor is in communication connection with the upper computer through the communication module.
Optionally, the current collecting circuit further includes: a switching circuit;
the input end of the switch circuit is electrically connected with the detection end of the Hall sensor, the output end of the switch circuit is electrically connected with the load, and the control end of the switch circuit receives a switch control signal.
Optionally, the microprocessor includes a first switch control terminal;
the first switch control end is electrically connected with the control end of the switch circuit.
Optionally, the hall sensor includes a second switch control end;
the second switch control end is electrically connected with the control end of the switch circuit.
Optionally, the current collecting circuit further includes: a display;
the display is in communication connection with the output end of the microprocessor; the display is used for displaying the current detection signal in real time.
According to another aspect of the present invention, there is provided a current collecting device, comprising the above current collecting circuit.
The current detection circuit provided by the embodiment of the utility model can realize the isolation detection of the current signal in the tested loop through the Hall sensor, has wider range of measurement, does not have the problems of large power consumption and high temperature rise caused by the sampling resistor compared with the setting mode of acquiring the current signal in the tested loop through the sampling resistor with small resistance and large power, has relatively higher measurement precision, is also provided with the analog-to-digital conversion circuit with the functions of signal amplification and analog-to-digital conversion, can amplify and perform analog-to-digital conversion on the received voltage signal to enable the voltage signal to become the voltage signal of digital quantity which can be identified by the microprocessor, so that the microprocessor can determine the current signal in the tested loop according to the voltage signal of the digital quantity, realizes the detection of the current signal in the tested loop, and can indirectly set the measurement range of the Hall sensor through the communication between the upper computer and the microprocessor, the microprocessor calculates and processes the range setting signal and then sends the range setting signal to the Hall sensor through the digital-to-analog conversion circuit, so that the current detection range of the Hall sensor is set, the circuit principle is simple and easy to realize, the precision is high, and the current signal in the detected loop can be effectively detected.
It should be understood that the statements herein are not intended to identify key or critical features of any embodiment of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a current collecting circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another current collecting circuit provided in the embodiment of the present invention;
fig. 3 is a schematic structural diagram of another current collecting circuit provided in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of another current collecting circuit provided in the embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below 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 shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a current collecting circuit provided by an embodiment of the present invention, as shown in fig. 1, the current collecting circuit: the Hall sensor 10, the analog-to-digital conversion circuit 20, the microprocessor 30 and the digital-to-analog conversion circuit 40; the detection ends (IP + and IP-) of the Hall sensor 10 are arranged in the detected loop 00, and the output end of the Hall sensor 10 is electrically connected with the input end CH of the analog-to-digital conversion circuit 20; the hall sensor 10 is used for detecting a current detection signal of the detected loop 00 and outputting a voltage detection signal to the analog-to-digital conversion circuit 20 according to the current detection signal; the signal detection end IN1 of the microprocessor 30 is IN communication connection with the output end DO of the analog-to-digital conversion circuit 20, the signal receiving end IN2 of the microprocessor 30 is IN communication connection with the upper computer, the control signal output end CO1 of the microprocessor 30 is IN communication connection with the input end IN3 of the digital-to-analog conversion circuit 40, and the output end A0 of the digital-to-analog conversion circuit 40 is electrically connected with the measuring range setting end VOC of the Hall sensor 10.
Specifically, for easy understanding, the detected loop 00 can be set as a simpler loop only including the power supply E0 and the load RL, that is, the power supply E0, the load RL and the ground GND are electrically connected in sequence, the detection end of the hall sensor 10 includes IP + and IP-, when detecting the current signal in the detected loop 00, the detection ends IP + and IP-can be sequentially set between the power supply and the load RL in the detected loop 00, the current in the detected loop 00 flows from the power supply E0 to the ground GND through the detection end IP +, the detection end IP-and the load RL of the hall sensor 10 in sequence, when the current in the detected loop 00 flows through the hall element in the hall sensor 10, and when a magnetic field passes through the magnetic sensing surface of the hall element, the output end of the detected loop 00 outputs a hall potential, thereby realizing the insulation isolation detection of the current signal in the detected loop 00, that is, the hall sensor 10 can convert the current detection signal IN the measured loop 00 into a voltage detection signal, and output the voltage detection signal to the analog-to-digital conversion circuit 20 through the output end, the analog-to-digital conversion circuit 20 can amplify and convert the received voltage detection signal, so that the voltage detection signal is converted into a digital voltage signal which can be recognized by the microprocessor 30 and then is sent to the signal detection end IN1 of the microprocessor 30, and thus the microprocessor 30 can determine the current of the measured loop 00 according to the digital voltage detection signal, and thus can detect the current signal of the measured loop 00; IN addition, the microprocessor 30 may also receive a range setting signal sent by the upper computer 01 through the signal receiving terminal IN2, and after performing calculation processing on the range setting signal, send the range setting signal to the digital-to-analog conversion circuit 40 through the control signal output terminal CO1, the digital-to-analog conversion circuit 40 performs digital-to-analog conversion processing on the range setting signal, and outputs the range setting signal of the analog quantity to the range setting terminal VOC of the hall sensor 10, so that the hall sensor 10 can determine an allowable maximum current detection value according to the range setting signal of the analog quantity.
The current detection circuit provided by the embodiment of the utility model can realize the isolation detection of the current signal in the tested loop through the Hall sensor, has wider range of measurement, does not have the problems of large power consumption and high temperature rise caused by the sampling resistor compared with the setting mode of acquiring the current signal in the tested loop through the sampling resistor with small resistance and large power, has relatively higher measurement precision, is also provided with the analog-to-digital conversion circuit with the functions of signal amplification and analog-to-digital conversion, can amplify and perform analog-to-digital conversion on the received voltage signal to enable the voltage signal to become the voltage signal of digital quantity which can be identified by the microprocessor, so that the microprocessor can determine the current signal in the tested loop according to the voltage signal of the digital quantity, realizes the detection of the current signal in the tested loop, and can indirectly set the measurement range of the Hall sensor through the communication between the upper computer and the microprocessor, the microprocessor calculates and processes the range setting signal and then sends the range setting signal to the Hall sensor through the digital-to-analog conversion circuit, so that the current detection range of the Hall sensor is set, the circuit principle is simple and easy to realize, the precision is high, and the current signal in the detected loop can be effectively detected.
Optionally, fig. 2 is a schematic structural diagram of another current collecting circuit provided in the embodiment of the present invention, as shown in fig. 2, the analog-to-digital conversion circuit 20 includes: a differential input circuit 21 and an analog-to-digital conversion chip U1; the output end of the hall sensor 10 comprises a detection signal output end VIOUT and a reference signal output end VZCR, the first input end of the differential input circuit 21 is electrically connected with the detection signal output end VIOUT, and the second input end of the differential input circuit 21 is electrically connected with the reference signal output end VZCR; a first output end of the differential input circuit 21 is electrically connected with a first differential signal input end CH0 of the analog-to-digital conversion chip U1, and a second output end of the differential input circuit 21 is electrically connected with a second differential signal input end CH1 of the analog-to-digital conversion chip U1; an output of the analog-to-digital conversion chip U1 is communicatively coupled to a signal detection terminal IN1 of the microprocessor 30.
Specifically, the analog-to-digital conversion chip U1 may be integrated with a differential amplification module and an analog-to-digital conversion module, and therefore the differential input circuit 21 may be configured to provide a differential signal to the differential amplification module, that is, a voltage detection signal output by the hall sensor 10 through the detection signal output terminal VIOUT and a reference signal output by the reference signal output terminal VZCR may be provided as a set of differential signals to the differential amplification module of the analog conversion chip U1 through the differential input circuit 21, the differential amplification module performs differential amplification on the voltage detection signal according to the received voltage detection signal and the reference signal, and performs analog-to-digital conversion on the differentially amplified voltage detection signal through the analog-to-digital conversion module, so as to output a voltage detection signal of a digital quantity that can be recognized by the microprocessor.
Alternatively, referring to fig. 2, the differential input circuit 21 includes: a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, and a third capacitor C3; the first resistor R1 is electrically connected between the detection signal output terminal VIOUT of the hall current sensor 10 and the first differential signal input terminal CH0 of the analog-to-digital conversion chip U1; the second resistor R2 is electrically connected between the reference signal output terminal VZCR of the hall current sensor 10 and the second differential signal input terminal CH1 of the analog-to-digital conversion chip U1; the first differential signal input terminal CH0 is grounded through a first capacitor C1, the second differential signal input terminal CH1 is grounded through a second capacitor C2, and the first differential signal input terminal CH0 and the second differential signal input terminal CH1 are electrically connected through a third capacitor C3.
Specifically, the first resistor R1 and the second resistor R2 are used for voltage division, that is, the voltage detection signal is transmitted to the first differential signal input terminal CH0 of the analog-to-digital conversion chip U1 after being divided by the first resistor R1, the reference signal is transmitted to the second differential signal input terminal CH1 of the analog-to-digital conversion chip U1 after being divided by the second resistor R2, and the first capacitor C1, the second capacitor C2 and the third capacitor C3 are all used for filtering, that is, the voltage detection signal and the reference signal provided to the analog-to-digital conversion chip U1 are filtered. The resistances of the first resistor R1 and the second resistor R2, and the capacitances of the first capacitor C1, the second capacitor C2, and the third capacitor C3 may be set according to design requirements, for example, the resistances of the first resistor R1 and the second resistor R2 may be set to be 1K Ω, and the capacitances of the first capacitor C1, the second capacitor C2, and the third capacitor C3 may be set to be 1 nF.
Optionally, fig. 3 is a schematic structural diagram of another current collecting circuit provided in the embodiment of the present invention, as shown in fig. 3, the microprocessor 10 further includes an analog-to-digital conversion control terminal CO2, and the analog-to-digital conversion control terminal CO2 is communicatively connected to the control terminal CIN of the analog-to-digital conversion chip U1.
Specifically, the microprocessor 10 may further control the amplification factor of the differential amplification module in the analog-to-digital conversion chip 20, that is, the microprocessor 10 may send a factor adjustment signal to the control terminal CIN of the analog-to-digital conversion chip U1 through the analog-to-digital conversion control terminal CO2, so that the differential amplification module in the analog-to-digital conversion chip U1 may adjust the amplification factor by the factor adjustment signal.
Optionally, referring to fig. 3, the current collecting circuit further includes a communication module 60; the microprocessor 10 is in communication connection with the upper computer 50 through a communication module 60.
Specifically, the communication module 60 may be a USB converter, and may convert the serial communication received by the microprocessor 10 into a USB interface to communicate with the upper computer 50.
Optionally, with reference to fig. 3, the current collecting circuit further includes a switch circuit 70, an input end of the switch circuit 70 is electrically connected to the detection end of the hall sensor 10, an output end of the switch circuit 70 is electrically connected to the load RL, and a control end of the switch circuit 70 receives the switch control signal.
Specifically, the input end of the switch circuit 70 may be electrically connected to the detection end IP-of the hall sensor 10 close to the load RL, and the output end of the switch circuit 70 is electrically connected to the end of the load RL far from the ground GND, and the switch circuit 70 may be turned on or off according to a switch control signal received by the control end of the switch circuit, when the switch circuit 70 is in the on state, the current in the measured loop 00 sequentially flows from the power supply E0 through the detection end IP +, the detection end IP-, the switch circuit and the load RL of the hall sensor 10 to the ground GND, when the switch circuit 70 is in the off state, the measured loop 00 is open-circuited without a current signal, and when the detection current obtained by the hall sensor exceeds the range, the switch circuit 70 is controlled to be turned off in time to perform a protection function.
Illustratively, the switching circuit 70 may include a transistor Q1, the transistor Q1 is preferably an IGBT, and the IGBT transistor may be an N-type IGBT or a P-type IGBT according to design requirements, which is not particularly limited by the embodiment of the present invention, and the IGBT transistor is illustrated as an N-type transistor, for example, as shown in fig. 3, when the switching circuit 70 includes an N-type IGBT transistor, the drain of the IGBT transistor is electrically connected to the detection terminal IP-of the hall sensor 10, and the source of the IGBT transistor is electrically connected to the load RL.
Optionally, with continued reference to fig. 3, the microprocessor 10 includes a first switch control CO 3; the first switch control terminal CO3 is electrically connected to the control terminal of the switch circuit 70.
Specifically, the microprocessor 10 may determine the maximum detection current of the hall sensor 10 according to the range setting signal of the upper computer 50, that is, the maximum value of the detection range of the hall sensor 10, compare the current detection signal obtained in real time with the maximum detection current, and when the current detection signal is greater than the maximum detection current, send a switch control signal for turning off the switch circuit 70 to the control terminal of the switch circuit 70 through the first switch control terminal CO3, so as to prevent the hall sensor 10 from being damaged by an excessive current in the detected loop 00, and when the current detection signal does not exceed the maximum value of the detection range of the hall sensor 10, send a switch control signal for turning on the switch circuit 70 to the control terminal of the switch circuit 70 through the first switch control terminal CO3, so that the detected loop 00 forms a current path.
Optionally, fig. 4 is a schematic structural diagram of another current collecting circuit provided in the embodiment of the present invention, as shown in fig. 4, the hall sensor 10 includes a second switch control terminal FAULT; the second switch control terminal FAULT is electrically connected to the control terminal of the switch circuit 70.
Specifically, the hall sensor 10 may be further configured to control the on/off of the switch circuit 70, at this time, a comparison module may be built in the hall sensor 10, and is configured to compare the acquired current detection signal with the maximum value of the measurement range thereof, similarly, when the current detection signal is greater than the maximum value of the measurement range, the hall sensor 10 sends a switch control signal for turning off the hall sensor to the control terminal of the switch circuit 70 through the second switch control terminal FAULT, so as to prevent the internal components of the hall sensor 10 from being damaged by an excessive current in the measured loop 00, and when the current detection signal does not exceed the maximum value of the measurement range, sends a switch control signal for turning on the hall sensor to the control terminal of the switch circuit 70 through the second switch control terminal FAULT, so that the measured loop 00 forms a current path, and thus, the current in the measured loop 00 shape can be acquired in real time; compared with the case of controlling the switch circuit 70 by the microprocessor 10, the protection circuit has higher response speed and can protect the circuit more effectively without transmission through the analog-to-digital conversion circuit.
Optionally, referring to fig. 3 or fig. 4, the current collecting circuit further includes a display 80, and the display 80 is connected to the output IO of the microprocessor 10 in a communication manner; the display 80 is used for displaying the current detection signal in real time.
Specifically, the display 80 may be an OLED display, and after determining the current detection signal IN the tested loop 00 according to the digital voltage detection signal received by the detection terminal IN1, the microprocessor 10 further sends the current detection signal to the display 80 through the output terminal IO thereof, so that the display 80 can display the detected current IN the tested loop 00 IN real time.
The embodiment of the utility model provides a current acquisition circuit can carry out the higher detection of precision to the electric current in the measured return circuit, and detects the range comparatively wide, and application scope is wider to set up switch circuit, can in time break off the electric current route in the measured return circuit when measuring current is great, realized the protection to circuit device side.
Based on the same inventive concept, the embodiment of the utility model provides a still provides a current collection device, and this current collection device includes the utility model discloses the current acquisition circuit that any embodiment provided, consequently the utility model discloses the current collection device that the embodiment provided includes the utility model discloses the technical characteristics of the current acquisition circuit that any embodiment provided can reach the utility model discloses the beneficial effect of the current acquisition circuit that any embodiment provided, the same part can refer to the above-mentioned right the utility model provides a description of the current acquisition circuit that the embodiment provides, no longer describe herein.
The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A current collection circuit, comprising: the device comprises a microprocessor, a digital-to-analog conversion circuit, a Hall sensor and an analog-to-digital conversion circuit;
the detection end of the Hall sensor is arranged in a detected loop, and the output end of the Hall sensor is electrically connected with the input end of the analog-to-digital conversion circuit; the Hall sensor is used for detecting a current detection signal of the detected loop and outputting a voltage detection signal to the analog-to-digital conversion circuit according to the current detection signal;
the signal detection end of the microprocessor is in communication connection with the output end of the analog-to-digital conversion circuit, the signal receiving end of the microprocessor is in communication connection with an upper computer, the control signal output end of the microprocessor is in communication connection with the input end of the digital-to-analog conversion circuit, and the output end of the digital-to-analog conversion circuit is electrically connected with the range setting end of the Hall sensor.
2. The current acquisition circuit of claim 1 wherein the analog-to-digital conversion circuit comprises: the differential input circuit and the analog-to-digital conversion chip; the output end of the Hall sensor comprises a detection signal output end and a reference signal output end,
a first input end of the differential input circuit is electrically connected with the detection signal output end, and a second input end of the differential input circuit is electrically connected with the reference signal output end;
a first output end of the differential input circuit is electrically connected with a first differential signal input end of the analog-to-digital conversion chip, and a second output end of the differential input circuit is electrically connected with a second differential signal input end of the analog-to-digital conversion chip;
and the output end of the analog-to-digital conversion chip is in communication connection with the signal detection end of the microprocessor.
3. The current acquisition circuit of claim 2 wherein the differential input circuit comprises: the circuit comprises a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor;
the first resistor is electrically connected between the detection signal output end of the Hall sensor and the first differential signal input end of the analog-to-digital conversion chip;
the second resistor is electrically connected between the reference signal output end of the Hall sensor and the second differential signal input end of the analog-to-digital conversion chip;
the first differential signal input end is grounded through the first capacitor, the second differential signal input end is grounded through the second capacitor, and the first differential signal input end and the second differential signal input end are also electrically connected through the third capacitor.
4. The current collection circuit of claim 2, wherein the microprocessor comprises an analog-to-digital conversion control terminal;
the analog-to-digital conversion control end is in communication connection with the control end of the analog-to-digital conversion chip.
5. The current acquisition circuit of claim 1, further comprising: a communication module;
and the microprocessor is in communication connection with the upper computer through the communication module.
6. The current acquisition circuit of claim 1, further comprising: a switching circuit;
the input end of the switch circuit is electrically connected with the detection end of the Hall sensor, the output end of the switch circuit is electrically connected with the load, and the control end of the switch circuit receives a switch control signal.
7. The current collecting circuit according to claim 6, wherein the microprocessor comprises a first switch control terminal;
the first switch control end is electrically connected with the control end of the switch circuit.
8. The current collecting circuit of claim 6, wherein said Hall sensor comprises a second switch control terminal;
the second switch control end is electrically connected with the control end of the switch circuit.
9. The current acquisition circuit of claim 1, further comprising: a display;
the display is in communication connection with the output end of the microprocessor; the display is used for displaying the current detection signal in real time.
10. A current collection device comprising the current collection circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221055008.4U CN217443440U (en) | 2022-05-06 | 2022-05-06 | Current acquisition circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221055008.4U CN217443440U (en) | 2022-05-06 | 2022-05-06 | Current acquisition circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217443440U true CN217443440U (en) | 2022-09-16 |
Family
ID=83218805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221055008.4U Active CN217443440U (en) | 2022-05-06 | 2022-05-06 | Current acquisition circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217443440U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116735929A (en) * | 2023-06-12 | 2023-09-12 | 深圳市开步电子有限公司 | Shunt, new energy automobile and energy storage equipment thereof |
-
2022
- 2022-05-06 CN CN202221055008.4U patent/CN217443440U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116735929A (en) * | 2023-06-12 | 2023-09-12 | 深圳市开步电子有限公司 | Shunt, new energy automobile and energy storage equipment thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103424580B (en) | Electronic load | |
| CN104991115B (en) | A kind of chopped mode direct current detection method and circuit | |
| CN104020346A (en) | Micro-current signal extraction system | |
| CN203705533U (en) | Current detection circuit of Hall current sensor of electric automobile | |
| CN217443440U (en) | Current acquisition circuit and device | |
| CN103257324A (en) | Magnetic sensor device | |
| CN103605396B (en) | Output current of converter treatment circuit and method | |
| CN109282856B (en) | Single-chip sensor capable of detecting temperature/voltage/current signals simultaneously | |
| CN103698578A (en) | Power output control method of automatic electric power meter reading system and automatic electric power meter reading system | |
| CN204008934U (en) | A kind of detection of electrical leakage and warning circuit | |
| CN211785744U (en) | High-side current detection device and system | |
| CN209014646U (en) | The current detection circuit and electric machine controller of direct measuring type Hall sensor | |
| CN202182911U (en) | Automatic gain regulating current detection circuit of low voltage soft starter | |
| CN201788222U (en) | AC-DC (alternating current-direct current) compatible isolated voltage sampling circuit | |
| CN107219392B (en) | Real-time current signal data processing system | |
| CN202599895U (en) | Bias voltage and non bias voltage operating circuit of electrochemistry gas sensor and bias voltage configuration circuit | |
| CN202614719U (en) | Amplifying circuit for carbon monoxide sensor | |
| CN102706931B (en) | Biasing and non-biasing operating circuit of electrochemical gas sensor and biasing configuration circuit | |
| CN213544659U (en) | Non-isolated direct current bus voltage detection circuit | |
| CN210323186U (en) | Current detection circuit | |
| CN207397132U (en) | High-precision temperature calibration system based on MCU | |
| CN216978170U (en) | Temperature sensor circuit structure | |
| CN218629989U (en) | Circuit and device for measuring two-terminal grounding resistance by using natural field | |
| CN109085417A (en) | The current detection circuit and electric machine controller of direct measuring type Hall sensor | |
| CN213364866U (en) | Current detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 198, Ruike Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province 215,300 Patentee after: Jiangsu Kerian Technology Co.,Ltd. Address before: 215300 Room No. 1299 Hengsheng Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: JIANGSU COWAIN AUTOMATION TECH. Co.,Ltd. |
|
| CP03 | Change of name, title or address |