CN211878154U - Voltage and current sensor testing device - Google Patents
Voltage and current sensor testing device Download PDFInfo
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- CN211878154U CN211878154U CN201922168135.XU CN201922168135U CN211878154U CN 211878154 U CN211878154 U CN 211878154U CN 201922168135 U CN201922168135 U CN 201922168135U CN 211878154 U CN211878154 U CN 211878154U
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Abstract
The utility model discloses a voltage and current sensor testing device, which comprises a power supply, a voltage and current sensor and an amplifying and conditioning circuit; the input end of the voltage and current sensor is connected with a voltage/current point to be measured, the output end of the voltage and current sensor is connected with the input end of the amplification conditioning circuit, and the output end of the amplification conditioning circuit is connected with the oscilloscope; and the power supply supplies power to the voltage and current sensor and the amplifying and conditioning circuit respectively. The utility model can be used for most of subways, has wide adaptability, and is simple and portable; the structure is simple, and the performance test can be carried out on the voltage and current sensor.
Description
Technical Field
The utility model belongs to the rail transit traction system field specifically indicates a voltage current sensor testing arrangement.
Background
The voltage sensor applied by the subway train traction system can have occasional faults of loss of detection voltage signals, so that certain potential safety hazards are caused to subway operation. Therefore, in order to improve the operation quality of the subway, the detection of the subway train sensor becomes an indispensable link, and the normal detection of the voltage and current sensor is the guarantee that the train can run safely and stably. However, currently, no specific test equipment can realize the function test of the voltage and current sensor in the subway train traction system.
In view of the above, it is actually necessary to provide a voltage and current sensor testing platform to realize normal detection of the voltage and current sensor.
Disclosure of Invention
An object of the present invention is to provide a voltage and current sensor testing device, which can solve the problem that the existing detection equipment can not meet the requirement of the testing function of the voltage and current sensor in the traction system of the subway train.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a voltage and current sensor testing device, which comprises a power supply, a voltage and current sensor and an amplifying and conditioning circuit; the input end of the voltage and current sensor is connected with a voltage/current point to be measured, the output end of the voltage and current sensor is connected with the input end of the amplification conditioning circuit, and the output end of the amplification conditioning circuit is connected with the oscilloscope; and the power supply supplies power to the voltage and current sensor and the amplifying and conditioning circuit respectively.
Further, the power supply includes: the battery pack comprises a 6V storage battery, an MC34063 voltage regulating chip and an MC7805 three-terminal voltage regulating chip, wherein the 6V storage battery supplies power to the MC34063 voltage regulating chip, and the voltage is regulated by the MC34063 voltage regulating chip to obtain +/-15V voltage; wherein, +15V voltage supplies power and obtains 5V voltage for MC7805 three-terminal regulator chip, and 5V voltage supplies power for voltage and current sensor, and 15V voltage supplies power for amplifying and conditioning circuit.
Further, the voltage and current sensors are Hall sensors.
Furthermore, an NE5532P chip is adopted in the amplification conditioning circuit.
The utility model discloses well collection voltage and current sensor's output signal is as voltage follower circuit's input signal, and voltage follower circuit enlargies voltage and current sensor, and the signal input after will enlarging further enlargies in the second grade amplitude enlargies the conditioning circuit, enlarges to the required amplitude of oscilloscope, and then exports and show for the oscilloscope. The voltage follower circuit works by using an NE5532P chip, the two-stage amplitude amplification circuit adopts a 2.5V reference source as a voltage reference, and a signal is amplified and output to an oscilloscope by an amplification circuit formed by the NE5532P chip.
The utility model can automatically read the data value collected by the sensor for the subway train sensor test system; through the detection to sensor performance state continuously, guarantee the reliability of sensor to can in time carry out preventive replacement to unstable period, thereby guarantee subway train safe operation.
The utility model has the advantages that:
the utility model can be used for most of subways, has wide adaptability, and is simple and portable; the structure is simple, and the performance test can be carried out on the voltage and current sensor.
Drawings
Fig. 1 is a schematic block diagram of the device of the present invention.
Fig. 2 is a schematic diagram of a power supply providing + 15V.
Fig. 3 is a schematic diagram of a power supply providing a voltage of-15V.
Fig. 4 is a circuit diagram of the apparatus of the present invention.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
Referring to fig. 1 to 4, a voltage and current sensor testing device of the present invention includes a power supply, a voltage and current sensor, and an amplifying and conditioning circuit; the input end of the voltage and current sensor is connected with a voltage/current point to be measured, the output end of the voltage and current sensor is connected with the input end of the amplification conditioning circuit, and the output end of the amplification conditioning circuit is connected to the oscilloscope; and the power supply supplies power to the voltage and current sensor and the amplification conditioning circuit respectively.
The power supply includes: the battery pack comprises a 6V storage battery, an MC34063 voltage regulating chip and an MC7805 three-terminal voltage regulating chip, wherein the 6V storage battery supplies power to the MC34063 voltage regulating chip, and the voltage is regulated by the MC34063 voltage regulating chip to obtain +/-15V voltage; wherein, +15V voltage supplies power and obtains 5V voltage for MC7805 three-terminal regulator chip, and 5V voltage supplies power for voltage and current sensor, and 15V voltage supplies power for amplifying and conditioning circuit.
And the voltage and current sensor is a Hall sensor.
The utility model discloses well collection voltage and current sensor's output signal is as voltage follower circuit's input signal, and voltage follower circuit enlargies voltage and current sensor, and the signal input after will enlarging further enlargies in the second grade amplitude enlargies the conditioning circuit, enlarges to the required amplitude of oscilloscope, and then exports and show for the oscilloscope. The voltage follower circuit works by using an NE5532P chip, the two-stage amplitude amplification circuit adopts a 2.5V reference source as a voltage reference, and a signal is amplified and output to an oscilloscope by an amplification circuit formed by the NE5532P chip.
The utility model discloses the concrete application way is many, and the above-mentioned only is the preferred embodiment of the utility model, should point out, to ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements, and these improvements also should be regarded as the utility model discloses a scope of protection.
Claims (4)
1. A voltage and current sensor testing device is characterized by comprising a power supply, a voltage and current sensor and an amplifying and conditioning circuit; the input end of the voltage and current sensor is connected with a voltage/current point to be measured, the output end of the voltage and current sensor is connected with the input end of the amplification conditioning circuit, and the output end of the amplification conditioning circuit is connected with the oscilloscope; and the power supply supplies power to the voltage and current sensor and the amplifying and conditioning circuit respectively.
2. The voltage current sensor testing arrangement of claim 1, wherein said power supply comprises: the device comprises a 6V storage battery, an MC34063 voltage regulation chip and an MC7805 three-terminal voltage regulation chip; the 6V storage battery supplies power to the MC34063 voltage regulating chip, and the voltage is regulated by the MC34063 voltage regulating chip to obtain +/-15V voltage; wherein, +15V voltage supplies power and obtains 5V voltage for MC7805 three-terminal regulator chip, and 5V voltage supplies power for voltage and current sensor, and 15V voltage supplies power for amplifying and conditioning circuit.
3. The voltage-current sensor testing device of claim 1, wherein an NE5532P chip is adopted in the amplification conditioning circuit.
4. The voltage-current sensor testing device according to claim 1, wherein said voltage and current sensors are hall sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922168135.XU CN211878154U (en) | 2019-12-06 | 2019-12-06 | Voltage and current sensor testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922168135.XU CN211878154U (en) | 2019-12-06 | 2019-12-06 | Voltage and current sensor testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211878154U true CN211878154U (en) | 2020-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922168135.XU Active CN211878154U (en) | 2019-12-06 | 2019-12-06 | Voltage and current sensor testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211878154U (en) |
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2019
- 2019-12-06 CN CN201922168135.XU patent/CN211878154U/en active Active
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