CN218383030U - Automatic power supply voltage judgment and test device - Google Patents
Automatic power supply voltage judgment and test device Download PDFInfo
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- CN218383030U CN218383030U CN202222608833.9U CN202222608833U CN218383030U CN 218383030 U CN218383030 U CN 218383030U CN 202222608833 U CN202222608833 U CN 202222608833U CN 218383030 U CN218383030 U CN 218383030U
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Abstract
The utility model discloses a power supply voltage automatic judgment and test device, which comprises an upper limit and a lower limit reference voltage regulating circuit, a voltage sampling circuit of a measured object, a VCC power supply circuit, an operational amplifying circuit, a logic circuit and an indicating circuit; the output end of the upper and lower limit reference voltage regulating circuit is connected with the input end of the operational amplification circuit, the output end of the tested object voltage sampling circuit is connected with the input end of the operational amplification circuit, the output end of the operational amplification circuit is connected with the input end of the logic circuit, the output end of the logic circuit is connected with the input end of the indicating circuit, and the VCC power supply circuit is connected with the upper and lower limit reference voltage regulating circuit, the operational amplification circuit and the logic circuit for power supply. Compared with the prior art, the utility model simple structure promotes efficiency of software testing.
Description
Technical Field
The utility model belongs to the technical field of the electronic product manufacture trade, in particular to supply voltage automatic judgement testing arrangement.
Background
Whether the output voltage is in a specified range or not needs to be judged according to the specification during power supply product testing, the FT1 station testing uses electronic load testing and displays the output voltage to operation manual judgment to judge whether the output voltage is in the specification range or not, and the manual judgment has the risks of long judgment time and wrong judgment and poor quality loss.
The patent with publication number CN105022000A discloses an automatic test equipment for power supply circuit boards, which comprises a computer host and a test module, and is characterized in that the test module controls a cylinder to be pressed downwards, a tested power supply circuit board is electrically connected with the test module through a thimble, the voltage of the power supply circuit board of a microwave oven is detected, whether the tested power supply circuit board works normally is automatically judged, and the voltage value obtained by the test and the judgment result are returned to the computer host to be displayed and recorded in a database for storage. The structure can fully automatically test the power supply circuit board of the microwave oven, realize that the test and the fault detection can be carried out without human intervention, an operator does not participate in the judgment of the quality of the electric control board, and can simultaneously operate a plurality of devices together, thereby realizing that more power supply boards can be tested without increasing the number of testers; the test module has a certain testable voltage range, so that the test module is not limited to testing one power supply circuit board, and other power supply circuit boards can be tested only by changing the configuration file.
However, the patent is used for testing the circuit board, and the application provides a judgment device for testing the power supply voltage, so that the risk that the judgment time is long and the quality is lost due to misjudgment in the manual judgment is avoided.
SUMMERY OF THE UTILITY MODEL
For solving the problem that proposes among the above-mentioned background art, the utility model provides a power supply voltage judges testing arrangement automatically, and the circuit is simple, improves efficiency of software testing, can the automatic display test result.
In order to achieve the above object, the utility model provides a following technical scheme:
a power supply voltage automatic judgment test device comprises an upper limit and a lower limit reference voltage regulating circuit, a voltage sampling circuit of a measured object, a VCC power supply circuit, an operational amplification circuit, a logic circuit and an indication circuit; the output end of the upper and lower limit reference voltage regulating circuit is connected with the input end of the operational amplifying circuit, the output end of the measured object voltage sampling circuit is connected with the input end of the operational amplifying circuit, the output end of the operational amplifying circuit is connected with the input end of the logic circuit, the output end of the logic circuit is connected with the input end of the indicating circuit, and the VCC power supply circuit is connected with the upper and lower limit reference voltage regulating circuit, the operational amplifying circuit and the logic circuit for power supply.
As a preferred embodiment of the present invention, the VCC power supply circuit of the present invention includes a three-terminal regulator U6, a capacitor CE1, and a capacitor CE2; the positive electrode of the capacitor CE1 is connected with an IN pin of the three-terminal voltage regulator U6, and the negative electrode of the capacitor CE1 is grounded; the anode of the capacitor CE2 is connected with the OUT pin of the three-terminal voltage regulator U6, and the cathode of the capacitor CE2 is grounded; and the GND pin of the three-terminal voltage regulator U6 is grounded.
As the preferred embodiment of the utility model, three terminal regulator U6's model is L7912CV three terminal regulator, provides 12V voltage.
As a preferred embodiment of the present invention, the operational amplifier circuit is composed of an operational amplifier U1, the model of the operational amplifier is LM358.
As a preferred embodiment of the present invention, the upper and lower limit reference voltage adjusting circuits of the present invention include an upper limit reference voltage adjusting input circuit and a lower limit reference voltage adjusting input circuit; the upper limit reference voltage regulating input circuit consists of a resistor R5 and an adjustable resistor VR1 which are connected in series and outputs the upper limit reference voltage regulating input circuit to a pin 3 of an operational amplifier U1; the lower limit reference voltage regulating input circuit consists of a resistor R5 and an adjustable resistor VR1 which are connected in series and outputs the lower limit reference voltage regulating input circuit to a pin 6 of an operational amplifier U1.
As a preferred embodiment of the present invention, the measured object voltage sampling circuit includes resistor R1, resistor R2, resistor R3 and resistor R4, resistor R1, resistor R2 and resistor R3 are connected in series in proper order, and operational amplifier U1's pin 2 and pin 5 are connected to resistor R3's output, resistor R4 one end connecting resistance R3's output, other end ground connection.
As the preferred embodiment of the present invention, the logic circuit is composed of a logic chip U5, and the model of the logic chip U5 is CD4081BE.
As the preferred embodiment of the present invention, the indicating circuit is composed of the light emitting diodes LED1 and LED 2.
As the preferred embodiment of the present invention, the LED2 is connected in series with a buzzer.
The utility model has the advantages that:
1. the output voltage of the tested object is sampled by a current divider circuit to an operational amplifier circuit and compared with the debugged upper and lower limit reference voltages to obtain two electric signals, if the output voltage of the tested object is within the specification range, the two signals are both high level and then are transmitted to two sampling points of a logic circuit to obtain a high level signal to control a rear PASS indicating circuit, otherwise if the output voltage of the tested object is beyond or below the specification range, an AND gate chip cannot simultaneously obtain two high levels, only one low level signal can be output to control the rear FAIL indicating circuit, the purpose of automatically judging the test result is achieved, and a tester only needs to look up an indicating lamp;
2. the processing efficiency is improved, the test result is automatically judged, the buzzer bad early warning circuit is arranged, and the test bad leakage risk is greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic block diagram of the overall structure of the present invention;
FIG. 2 is a detailed circuit diagram of the present invention;
fig. 3 is a schematic diagram of the VCC power supply circuit of the present invention;
FIG. 4 is a schematic diagram of the structure of the upper and lower limit reference voltage adjusting circuit, the voltage sampling circuit of the measured object, and the operational amplifying circuit of the present invention;
FIG. 5 is a schematic diagram of the logic circuit structure of the present invention;
fig. 6 is a schematic diagram of the indicating circuit structure of the present invention.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1-2, an automatic power supply voltage determination testing apparatus includes an upper and lower limit reference voltage regulating circuit, a voltage sampling circuit of an object to be tested, a VCC power supply circuit, an operational amplifier circuit, a logic circuit, and an indication circuit; the output end of the upper and lower limit reference voltage regulating circuit is connected with the input end of the operational amplifying circuit, the output end of the measured object voltage sampling circuit is connected with the input end of the operational amplifying circuit, the output end of the operational amplifying circuit is connected with the input end of the logic circuit, the output end of the logic circuit is connected with the input end of the indicating circuit, and the VCC power supply circuit is connected with the upper and lower limit reference voltage regulating circuit, the operational amplifying circuit and the logic circuit for power supply.
As shown in fig. 3, according to the preferred embodiment of the present invention, the VCC power supply circuit of the present invention includes a three-terminal regulator U6, a capacitor CE1 and a capacitor CE2; the anode of the capacitor CE1 is connected with an IN pin of the three-terminal voltage regulator U6, and the cathode of the capacitor CE1 is grounded; the anode of the capacitor CE2 is connected with the OUT pin of the three-terminal voltage regulator U6, and the cathode of the capacitor CE2 is grounded; and the GND pin of the three-terminal voltage regulator U6 is grounded. Three terminal regulator U6's model is L7912CV three terminal regulator, provides 12V voltage. VCC power supply: an L7912CV three-terminal regulator is adopted to provide 12V voltage for supplying power to the chip and the reference sampling circuit.
As shown in fig. 4, the operational amplifier circuit of the present invention is composed of an operational amplifier U1, the model of which is LM358. The upper and lower limit reference voltage regulating circuit of the utility model comprises an upper limit reference voltage regulating input circuit and a lower limit reference voltage regulating input circuit; the upper limit reference voltage regulating input circuit consists of a resistor R5 and an adjustable resistor VR1 which are connected in series and outputs the upper limit reference voltage regulating input circuit to a pin 3 of an operational amplifier U1; the lower limit reference voltage regulating input circuit consists of a resistor R5 and an adjustable resistor VR1 which are connected in series and outputs the lower limit reference voltage regulating input circuit to a pin 6 of an operational amplifier U1. Measured object voltage sampling circuit includes resistance R1, resistance R2, resistance R3 and resistance R4, resistance R1, resistance R2 and resistance R3 establish ties each other in proper order, and operational amplifier U1's pin 2 and pin 5 are connected to resistance R3's output, resistance R4 one end connecting resistance R3's output, other end ground connection. The R1/R2/R3/R4 current partial pressure samples the voltage of the measured object and inputs the sampled voltage to the pin 2/5 of the chip, R5/VR1 is the voltage upper limit reference voltage and adjusts the input to the pin 3 of the chip, R6/VR2 lower limit reference voltage adjusts the input to the pin 6 of the chip, when the measured voltage is in the specification range: the voltage of the pin 2 is less than the voltage of the pin 3, and S1 (pin 1) outputs high level; the voltage of the 5 pin is more than that of the 6 pin, and S2 (pin 7) outputs high level; and conversely, when the voltage of the measured object is higher or lower than the specification range, one of S1 or S2 is low.
As shown in fig. 5, the logic circuit of the present invention is composed of a logic chip U5, and the model of the logic chip U5 is CD4081BE. The CD4081BE logic operation chip outputs high level when S1 (pin 1) and S2 (pin 2) simultaneously satisfy high level, OUT1 (pin 3).
As shown in fig. 6, the indication circuit of the present invention is composed of light emitting diodes LED1 and LED 2. The test result indicating circuit: when the measured voltage is within the specification range, OUT1 outputs high level, Q1 conducts LED1, and a green light is on, which represents testing PASS; otherwise, when the voltage is not in the specification range, the OUT1 outputs low level, the Q1 is not conducted, the Q3 is conducted, the LED2 is turned on, and a red light is on, so that FAIL testing is represented.
Example 2
The difference from the embodiment 1 is that the other structure is the same, and the embodiment 2 is additionally added with a buzzer connected in series with the LED 2. The LED2 can be additionally provided with a relay and a buzzer circuit according to the requirement to give an alarm when the detected object is bad. And a buzzer bad early warning circuit is arranged, so that the risk of bad leakage in testing is greatly reduced.
The working principle of the utility model is as follows: the testing device samples the output voltage of the tested object to the LM358 chip through the current divider circuit and compares the output voltage with the debugged upper and lower limit reference voltage to obtain two electric signals, if the output voltage of the tested object is in the specification range, the two signals are high levels and then are transmitted to two sampling points of the CD4081BE AND gate chip, a high level signal is obtained to control the rear PASS indicating circuit, otherwise, if the output voltage of the tested object exceeds or is lower than the specification range, the AND gate chip can not obtain two high levels simultaneously, only one low level signal can BE output to control the rear FAIL indicating circuit, the purpose of automatically judging the test result is achieved, and a tester only needs to look over the indicating lamp. If there is a buzzer bad early warning circuit, the risk of bad leakage is greatly reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a power supply voltage automatic judgement testing arrangement which characterized in that: the device comprises an upper limit and lower limit reference voltage regulating circuit, a voltage sampling circuit of a measured object, a VCC power supply circuit, an operational amplification circuit, a logic circuit and an indicating circuit; the output end of the upper and lower limit reference voltage regulating circuit is connected with the input end of the operational amplifying circuit, the output end of the measured object voltage sampling circuit is connected with the input end of the operational amplifying circuit, the output end of the operational amplifying circuit is connected with the input end of the logic circuit, the output end of the logic circuit is connected with the input end of the indicating circuit, and the VCC power supply circuit is connected with the upper and lower limit reference voltage regulating circuit, the operational amplifying circuit and the logic circuit for power supply.
2. The power supply voltage automatic determination test apparatus according to claim 1, characterized in that: the VCC power supply circuit comprises a three-terminal regulator U6, a capacitor CE1 and a capacitor CE2; the positive electrode of the capacitor CE1 is connected with an IN pin of the three-terminal voltage regulator U6, and the negative electrode of the capacitor CE1 is grounded; the positive electrode of the capacitor CE2 is connected with the OUT pin of the three-terminal voltage regulator U6, and the negative electrode of the capacitor CE2 is grounded; and the GND pin of the three-terminal regulator U6 is grounded.
3. The power supply voltage automatic determination test apparatus according to claim 2, characterized in that: the model of the three-terminal regulator U6 is an L7912CV three-terminal regulator, and 12V voltage is provided.
4. The power supply voltage automatic determination test apparatus according to claim 1, characterized in that: the operational amplification circuit is composed of an operational amplifier U1, and the model of the operational amplifier is LM358.
5. The power supply voltage automatic determination test apparatus according to claim 4, characterized in that: the upper and lower limit reference voltage regulating circuit comprises an upper limit reference voltage regulating input circuit and a lower limit reference voltage regulating input circuit; the upper limit reference voltage regulating input circuit consists of a resistor R5 and an adjustable resistor VR1 which are connected in series and outputs the upper limit reference voltage regulating input circuit to a pin 3 of an operational amplifier U1; the lower limit reference voltage regulating input circuit consists of a resistor R5 and an adjustable resistor VR1 which are connected in series and outputs the lower limit reference voltage regulating input circuit to a pin 6 of an operational amplifier U1.
6. The automatic determination test device for power supply voltage according to claim 4, wherein: the measured object voltage sampling circuit comprises a resistor R1, a resistor R2, a resistor R3 and a resistor R4, the resistor R1, the resistor R2 and the resistor R3 are sequentially connected in series, the output end of the resistor R3 is connected with a pin 2 and a pin 5 of an operational amplifier U1, one end of the resistor R4 is connected with the output end of the resistor R3, and the other end of the resistor R4 is grounded.
7. The power supply voltage automatic determination test apparatus according to claim 1, characterized in that: the logic circuit is composed of a logic chip U5, and the model of the logic chip U5 is CD4081BE.
8. The power supply voltage automatic determination test apparatus according to claim 1, characterized in that: the indicating circuit is composed of light emitting diodes LED1 and LED 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222608833.9U CN218383030U (en) | 2022-09-30 | 2022-09-30 | Automatic power supply voltage judgment and test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222608833.9U CN218383030U (en) | 2022-09-30 | 2022-09-30 | Automatic power supply voltage judgment and test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218383030U true CN218383030U (en) | 2023-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222608833.9U Active CN218383030U (en) | 2022-09-30 | 2022-09-30 | Automatic power supply voltage judgment and test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218383030U (en) |
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2022
- 2022-09-30 CN CN202222608833.9U patent/CN218383030U/en active Active
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