CN212460021U - Sensor detection table - Google Patents
Sensor detection table Download PDFInfo
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- CN212460021U CN212460021U CN202021069298.9U CN202021069298U CN212460021U CN 212460021 U CN212460021 U CN 212460021U CN 202021069298 U CN202021069298 U CN 202021069298U CN 212460021 U CN212460021 U CN 212460021U
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Abstract
The utility model discloses a sensor detects platform, including first power, second power, on-resistance measuring circuit, insulation resistance measuring circuit, analog-to-digital conversion unit, the control unit, display element, memory cell and drive interface unit. The utility model discloses sensor detects integrated analog-to-digital conversion circuit of platform, treater and FPGA module, has stronger data processing ability, and data transmission is fast, can show the state and the result of self-checking and test procedure in real time, and the insulation resistance when detecting the electric bridge and measuring external voltage and adopt constant current source resistance-measuring, the test accuracy is high.
Description
Technical Field
The utility model relates to a sensor check out test set especially relates to sensor examines test table.
Background
The traditional resistance tester consists of resistance tubes, and has the disadvantages of high power consumption, high heating weight, large error, poor data processing capability and expansion capability, slow data transmission and incapability of displaying the state and result of the self-checking and testing process in real time.
SUMMERY OF THE UTILITY MODEL
The present invention aims to solve the above problems by providing a sensor testing platform, which comprises a first power supply, a second power supply, an on-resistance measuring circuit, an insulation resistance measuring circuit, an analog-to-digital conversion unit, a control unit, a display unit, a storage unit and a driving interface unit; the on-resistance measuring circuit and the insulation resistance measuring circuit are connected with the input end of the analog-to-digital conversion unit through the signal processing circuit; the output end of the analog-to-digital conversion unit is connected with the input end of the control unit; the control unit is connected with the display unit, the storage unit and the driving interface unit; the on-resistance measuring circuit comprises a first power supply and a first signal processing circuit, and the first power supply is connected with the analog-to-digital conversion unit through the first signal processing circuit; the insulation resistance measuring circuit comprises a second power supply and a second signal processing circuit; the second power supply is connected with the analog-to-digital conversion unit through a second signal processing circuit.
The beneficial effects of the utility model reside in that: the utility model discloses sensor detects integrated analog-to-digital conversion circuit of platform, treater and FPGA module, has stronger data processing ability, and data transmission is fast, can show the state and the result of self-checking and test procedure in real time, and the insulation resistance when detecting the electric bridge and measuring external voltage and adopt constant current source resistance-measuring, the test accuracy is high.
Drawings
FIG. 1 is a system diagram of the present invention;
FIG. 2 is a circuit diagram of a detection bridge;
fig. 3 is a circuit diagram of a signal conditioning circuit.
In the figure: u shapeREF-a reference power supply; u1 — first power supply; u2 — second power supply; r1 — first resistance; r2 — second resistance; r3 — third resistance; r4-fourth resistor; r5-fifth resistor; r6-sixth resistance; r7 — seventh resistor; r8 — eighth resistance; r9 — ninth resistor; an N-zener diode; a V-operational amplifier.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1, the sensor detection table of the present invention comprises a first power supply, a second power supply, an on-resistance measurement circuit, an insulation resistance measurement circuit, an analog-to-digital conversion unit, a control unit, a display unit, a storage unit and a driving interface unit; the on-resistance measuring circuit and the insulation resistance measuring circuit are connected with the input end of the analog-to-digital conversion unit through the signal processing circuit; the output end of the analog-to-digital conversion unit is connected with the input end of the control unit; the control unit is connected with the display unit, the storage unit and the driving interface unit; the on-resistance measuring circuit comprises a first power supply and a first signal processing circuit, and the first power supply is connected with the analog-to-digital conversion unit through the first signal processing circuit; the insulation resistance measuring circuit comprises a second power supply and a second signal processing circuit; the second power supply is connected with the analog-to-digital conversion unit through a second signal processing circuit.
Specifically, the first power supply is a 250V power supply; the second power supply is a constant current source.
Specifically, the first signal processing circuit comprises a detection bridge and a first programmable amplifier; the first power supply, the detection bridge, the first program control amplifier and the analog-to-digital conversion unit are connected in sequence.
Specifically, the detection bridge comprises a reference power supply, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor; the first output end of the first power supply is connected with the first end of the first resistor and the first end of the third resistor; the second input end of the first power supply is connected with the second end of the second resistor and the second end of the fifth resistor; the second end of the first resistor and the first end of the second resistor are connected with the input end of the reference power supply; the second end of the third resistor is connected with the first end of the fourth resistor; and the second end of the fourth resistor and the first end of the fifth resistor are connected with the output end of the detection bridge.
Specifically, the second signal processing circuit includes a signal conditioning circuit and a second program-controlled amplifier; the second power supply, the signal conditioning circuit, the second program control amplifier and the analog-to-digital conversion unit are connected in sequence.
Specifically, the signal conditioning circuit comprises a sixth resistor, a seventh resistor, a voltage stabilizing diode, an operational amplifier, an eighth resistor and a ninth resistor; the second power supply is connected with the first end of the seventh resistor and the cathode of the voltage stabilizing diode through a sixth resistor; the anode of the voltage stabilizing diode is grounded; the second end of the seventh resistor is connected with the homodromous input end of the operational amplifier; the output end of the operational amplifier is connected with the first end of the eighth resistor and the first output end of the signal conditioning circuit; the reverse input end of the operational amplifier is connected with the second end of the eighth resistor, the first end of the ninth resistor and the second output end of the signal conditioning circuit; and the second end of the ninth resistor is grounded.
Specifically, the control unit adopts a ZYNQ 7000 chip.
Specifically, the driving interface unit comprises a CAN driver and an RS485 driver; the CAN driver and the RS485 driver are respectively connected with the control unit. The display adopts an LCD display.
Measuring the insulation resistance of an applied voltage by using a detection bridge, testing the current flowing through the detection bridge, and converting the current into a giant insulation resistance value; the constant current source is adopted to measure the resistance, so that the error caused by the adoption of a voltmeter and an ammeter in measurement is avoided.
The control unit sends out a test command through the CAN bus, when the detected equipment receives the command and responds, the control unit automatically sends out self-checking information through the CAN bus, and after receiving the information, the control unit immediately displays the information on a screen and simultaneously stores the information in a system memory.
The utility model discloses sensor detects integrated analog-to-digital conversion circuit of platform, treater and FPGA module, has stronger data processing ability, and data transmission is fast, can show the state and the result of self-checking and test procedure in real time, and the insulation resistance when detecting the electric bridge and measuring external voltage and adopt constant current source resistance-measuring, the test accuracy is high.
The technical scheme of the utility model is not limited to the restriction of above-mentioned specific embodiment, all according to the utility model discloses a technical scheme makes technical deformation, all falls into within the protection scope of the utility model.
Claims (8)
1. The sensor detection table is characterized by comprising a first power supply, a second power supply, an on-resistance measurement circuit, an insulation resistance measurement circuit, an analog-to-digital conversion unit, a control unit, a display unit, a storage unit and a driving interface unit; the on-resistance measuring circuit and the insulation resistance measuring circuit are connected with the input end of the analog-to-digital conversion unit through the signal processing circuit; the output end of the analog-to-digital conversion unit is connected with the input end of the control unit; the control unit is connected with the display unit, the storage unit and the driving interface unit; the on-resistance measuring circuit comprises a first power supply and a first signal processing circuit, and the first power supply is connected with the analog-to-digital conversion unit through the first signal processing circuit; the insulation resistance measuring circuit comprises a second power supply and a second signal processing circuit; the second power supply is connected with the analog-to-digital conversion unit through a second signal processing circuit.
2. The sensor testing station of claim 1, wherein said first power supply is a 250V power supply; the second power supply is a constant current source.
3. The sensor testing station of claim 1, wherein said first signal processing circuit comprises a sensing bridge and a first programmable amplifier; the first power supply, the detection bridge, the first program control amplifier and the analog-to-digital conversion unit are connected in sequence.
4. The sensor testing station of claim 3, wherein said testing bridge comprises a reference power source, a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor; the first output end of the first power supply is connected with the first end of the first resistor and the first end of the third resistor; the second input end of the first power supply is connected with the second end of the second resistor and the second end of the fifth resistor; the second end of the first resistor and the first end of the second resistor are connected with the input end of the reference power supply; the second end of the third resistor is connected with the first end of the fourth resistor; and the second end of the fourth resistor and the first end of the fifth resistor are connected with the output end of the detection bridge.
5. The sensor testing station of claim 1, wherein said second signal processing circuitry comprises signal conditioning circuitry and a second programmable amplifier; the second power supply, the signal conditioning circuit, the second program control amplifier and the analog-to-digital conversion unit are connected in sequence.
6. The sensor testing station of claim 5, wherein the signal conditioning circuit comprises a sixth resistor, a seventh resistor, a zener diode, an operational amplifier, an eighth resistor, and a ninth resistor; the second power supply is connected with the first end of the seventh resistor and the cathode of the voltage stabilizing diode through a sixth resistor; the anode of the voltage stabilizing diode is grounded; the second end of the seventh resistor is connected with the homodromous input end of the operational amplifier; the output end of the operational amplifier is connected with the first end of the eighth resistor and the first output end of the signal conditioning circuit; the reverse input end of the operational amplifier is connected with the second end of the eighth resistor, the first end of the ninth resistor and the second output end of the signal conditioning circuit; and the second end of the ninth resistor is grounded.
7. The sensor testing station of claim 1, wherein said control unit employs a ZYNQ 7000 chip.
8. The sensor testing station of claim 1, wherein said drive interface unit comprises a CAN driver and an RS485 driver; the CAN driver and the RS485 driver are respectively connected with the control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021069298.9U CN212460021U (en) | 2020-06-11 | 2020-06-11 | Sensor detection table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021069298.9U CN212460021U (en) | 2020-06-11 | 2020-06-11 | Sensor detection table |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212460021U true CN212460021U (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021069298.9U Active CN212460021U (en) | 2020-06-11 | 2020-06-11 | Sensor detection table |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212460021U (en) |
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2020
- 2020-06-11 CN CN202021069298.9U patent/CN212460021U/en active Active
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