CN211402517U - Current detection circuit applied to elevator device - Google Patents
Current detection circuit applied to elevator device Download PDFInfo
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- CN211402517U CN211402517U CN201921866917.4U CN201921866917U CN211402517U CN 211402517 U CN211402517 U CN 211402517U CN 201921866917 U CN201921866917 U CN 201921866917U CN 211402517 U CN211402517 U CN 211402517U
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- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 238000001914 filtration Methods 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 9
- 238000002955 isolation Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a be applied to elevator device's current detection circuit, including ACS712 current sensor, voltage-stabilizing capacitor C1, filter capacitor C2 and emitting diode D1. The current detection circuit applied to the elevator device realizes the automatic detection of the current of the elevator device through the on-off control of the ACS712 current sensor, can judge whether the detected current in the elevator device exceeds the maximum range, and turns off the power supply, thereby realizing the self-protection function. Compared with a resistance detection method, the method has the advantages of high reliability, high energy utilization rate and high cost performance, can realize the function of electrical isolation, and enhances the safety of a switch circuit. Compared with a current transformer detection method, the method has the advantages of small volume and low operation cost, and can be widely applied to a switching power supply and overcurrent protection.
Description
Technical Field
The utility model relates to a detection circuitry specifically is a be applied to elevator device's current detection circuit.
Background
With the rapid development of economy, there are more and more high-rise buildings and building buildings, and therefore the number of installed elevators is increasing, and the detected amount in an elevator system is also increasing. However, if the elevator device is lack of a related detection circuit, the related data cannot be accurately detected and analyzed, and then the problems of resource waste, environmental pollution, low operation efficiency and the like are caused. The current detection circuit is additionally arranged in the elevator control device, so that the related data of the current in the circuit can be accurately obtained, and the problems of fire and the like can be avoided.
There are many methods for detecting current commonly used in power supplies, such as resistance detection, current transformer detection, hall sensor element detection, etc., each of which has advantages and disadvantages.
The method for detecting the current by using the resistor has the advantages of simple and practical structure, good real-time property, low cost, stable temperature coefficient and low energy utilization rate, does not have an electrical isolation function and has poor anti-interference capability.
The method for detecting the current by using the current transformer has the advantages of simple and reliable function, electrical isolation function, long service cycle and convenient maintenance, and has the disadvantages of high cost performance and large weight and volume.
The method for detecting the current by utilizing the Hall sensor has the advantages of small volume, simple structure, high reliability, electrical isolation function and susceptibility to ESD due to the fact that the method is easily interfered by an external magnetic field.
The ACS712 chip is a linear current sensor that incorporates a precise, low-bias linear hall sensor circuit capable of outputting a voltage proportional to the sensed ac or dc current. The ACS712 chip has the advantages of low noise, fast response time, maximum total output error of 1.5%, high output sensitivity of 66 mV/A-185 mV/A, convenient use, high cost performance, high insulation voltage and the like, and is mainly applied to motor control, load detection and management, switch-mode power supplies, overcurrent fault protection and the like. The stabilized chopping technology provides the Hall components and the amplifier in the chip with the minimum bias voltage, and the technology can almost eliminate the output drift of the chip caused by temperature.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a be applied to elevator device's current detection circuit to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a current detection circuit applied to an elevator device comprises an ACS712 current sensor, a voltage stabilizing capacitor C1, a filter capacitor C2 and a light emitting diode D1; the ACS712 current sensor comprises 8 pins, wherein the 8 pins are a No. 1 pin IP +, a No. 2 pin IP +, a No. 3 pin IP-, a No. 4 pin IP-, a No. 5 pin GND, a No. 6 pin FILTER, a No. 7 pin VIOUT and a No. 8 pin VCC respectively; the No. 1 pin IP + and the No. 2 pin IP + are connected and connected to one side of the circuit; the No. 3 pin IP-and the No. 4 pin IP-are connected and connected with the other side of the tested circuit, and the No. 1 pin IP + and the No. 2 pin IP + as well as the No. 3 pin IP-and the No. 4 pin IP-are connected in series on the circuit; the No. 5 pin GND is grounded; the No. 6 pin FILTER is connected to one side of a FILTER capacitor C2 for filtering specific waveband frequencies in the signals, and the other side of the FILTER capacitor C2 is grounded; the No. 7 pin VIOUT is connected with the signal input end of the singlechip; the No. 8 pin VCC is connected with a +5V power supply; one ends of the voltage-stabilizing capacitor C1 and the light-emitting diode D1 are both connected to a +5V power supply, and the other ends are both grounded.
As a further aspect of the present invention: the model of the ACS712 current sensor is ACS712 ELCTR-05B-T.
As a further aspect of the present invention: the capacitance of the voltage-stabilizing capacitor C1 is 0.1 uF.
As a further aspect of the present invention: the capacitance of the filter capacitor C2 is 1nF in size.
As a further aspect of the present invention: the input voltage VCC ranges from 4.5V to 5.5V.
As a further aspect of the present invention: and a resistor R1 for limiting current is also connected between the light-emitting diode D1 and the +5V power supply.
Compared with the prior art, the beneficial effects of the utility model are that: the ACS712 current sensor is controlled to be switched on and off, so that the current of the elevator device is automatically detected, whether the detected current in the elevator device exceeds the maximum range or not can be judged, the power supply is switched off, and the self-protection function is realized. Compared with a resistance detection method, the method has the advantages of high reliability, high energy utilization rate and high cost performance, can realize the function of electrical isolation, and enhances the safety of a switch circuit. Compared with a current transformer detection method, the method has the advantages of small volume and low operation cost, and can be widely applied to a switching power supply and overcurrent protection.
Drawings
Fig. 1 is a schematic configuration diagram of a current detection circuit applied to an elevator apparatus in embodiment 1.
Fig. 2 is a schematic configuration diagram of a current detection circuit applied to an elevator apparatus in embodiment 2.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Example 1
Referring to fig. 1, the present embodiment provides a current detection circuit applied to an elevator apparatus, including an ACS712 current sensor, a voltage stabilizing capacitor C1, a filter capacitor C2, and a light emitting diode D1; the ACS712 current sensor comprises 8 pins which are respectively a No. 1 pin IP +, a No. 2 pin IP +, a No. 3 pin IP-, a No. 4 pin IP-, a No. 5 pin GND, a No. 6 pin FILTER, a No. 7 pin VIOUT and a No. 8 pin VCC; the No. 1 pin IP + and the No. 2 pin IP + are connected and connected to one side of the circuit; the No. 3 pin IP-and the No. 4 pin IP-are connected and connected with the other side of the tested circuit, and the No. 1 pin IP + and the No. 2 pin IP + as well as the No. 3 pin IP-and the No. 4 pin IP-are connected in series on the circuit; the No. 5 pin GND is grounded; the No. 6 pin FILTER is connected to one side of a FILTER capacitor C2 for filtering specific waveband frequencies in the signals, and the other side of the FILTER capacitor C2 is grounded; the No. 7 pin VIOUT is connected with the signal input end of the singlechip; the No. 8 pin VCC is connected with a +5V power supply; one ends of the voltage-stabilizing capacitor C1 and the light-emitting diode D1 are both connected to a +5V power supply, and the other ends are both grounded.
The type of the ACS712 current sensor is not limited, and in this embodiment, the type of the ACS712 current sensor is preferably ACS712 ELCTR-05B-T.
The capacitance of the voltage-stabilizing capacitor C1 is not limited, and in this embodiment, the capacitance of the voltage-stabilizing capacitor C1 is preferably 0.1 uF.
The capacitance of the filter capacitor C2 is not limited, and in this embodiment, the capacitance of the filter capacitor C2 is preferably 1 nF.
The range of the input voltage VCC is not limited, and in this embodiment, preferably, the range of the input voltage VCC is 4.5V to 5.5V.
The working principle of the embodiment is as follows: when current flows through the ACS712 current sensor, the ACS712 current sensor works, the voltage stabilizing capacitor C1 enables the external power supply voltage 5V to be more stable, the filter capacitor C2 is used for filtering and filtering specific waveband frequencies in signals, and interference is restrained and prevented, and when the circuit is in a working state, namely the 5V power supply voltage is switched on, the light emitting diode D1 is switched on, and the light emitting diode D1 emits light.
Example 2
Referring to fig. 2, the embodiment is further improved on the basis of embodiment 1, and the improvement is as follows: and a resistor R1 for limiting current is connected between the light emitting diode D1 and the +5V power supply, and the resistor R1 plays a role in limiting current and prevents the light emitting diode D1 from exploding due to overlarge current.
It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
Claims (6)
1. A current detection circuit applied to an elevator device is characterized by comprising an ACS712 current sensor, a voltage-stabilizing capacitor C1, a filter capacitor C2 and a light-emitting diode D1; the ACS712 current sensor comprises 8 pins, wherein the 8 pins are a No. 1 pin IP +, a No. 2 pin IP +, a No. 3 pin IP-, a No. 4 pin IP-, a No. 5 pin GND, a No. 6 pin FILTER, a No. 7 pin VIOUT and a No. 8 pin VCC respectively; the No. 1 pin IP + and the No. 2 pin IP + are connected and connected to one side of the circuit; the No. 3 pin IP-and the No. 4 pin IP-are connected and connected with the other side of the tested circuit, and the No. 1 pin IP + and the No. 2 pin IP + as well as the No. 3 pin IP-and the No. 4 pin IP-are connected in series on the circuit; the No. 5 pin GND is grounded; the No. 6 pin FILTER is connected to one side of a FILTER capacitor C2 for filtering specific waveband frequencies in the signals, and the other side of the FILTER capacitor C2 is grounded; the No. 7 pin VIOUT is connected with the signal input end of the singlechip; the No. 8 pin VCC is connected with a +5V power supply; one ends of the voltage-stabilizing capacitor C1 and the light-emitting diode D1 are both connected to a +5V power supply, and the other ends are both grounded.
2. The current sensing circuit for an elevator apparatus according to claim 1, wherein said ACS712 current sensor is of the type ACS712 ELCTR-05B-T.
3. The current detection circuit applied to the elevator device according to claim 2, wherein the capacitance of the voltage stabilizing capacitor C1 is 0.1uF in magnitude.
4. The current sensing circuit as claimed in claim 1, wherein the filter capacitor C2 has a capacitance of 1 nF.
5. The current sensing circuit as recited in claim 1, further comprising an input voltage VCC for powering the circuit, wherein the input voltage VCC is in a range of 4.5V to 5.5V.
6. The current detection circuit applied to the elevator device according to claim 1, wherein a resistor R1 for limiting current is further connected between the light emitting diode D1 and the +5V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921866917.4U CN211402517U (en) | 2019-10-31 | 2019-10-31 | Current detection circuit applied to elevator device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921866917.4U CN211402517U (en) | 2019-10-31 | 2019-10-31 | Current detection circuit applied to elevator device |
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| CN211402517U true CN211402517U (en) | 2020-09-01 |
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| CN201921866917.4U Active CN211402517U (en) | 2019-10-31 | 2019-10-31 | Current detection circuit applied to elevator device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12113351B2 (en) | 2022-06-21 | 2024-10-08 | Gemstone Lights | Circuit breaker having a current sensing circuit, control circuit, comparison circuit, electric relay and latching circuit |
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2019
- 2019-10-31 CN CN201921866917.4U patent/CN211402517U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12113351B2 (en) | 2022-06-21 | 2024-10-08 | Gemstone Lights | Circuit breaker having a current sensing circuit, control circuit, comparison circuit, electric relay and latching circuit |
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