CN216560857U - Direct current withstand voltage test output live indicating circuit - Google Patents
Direct current withstand voltage test output live indicating circuit Download PDFInfo
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- CN216560857U CN216560857U CN202123049959.9U CN202123049959U CN216560857U CN 216560857 U CN216560857 U CN 216560857U CN 202123049959 U CN202123049959 U CN 202123049959U CN 216560857 U CN216560857 U CN 216560857U
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Abstract
The utility model discloses a direct current voltage withstanding test output live indicating circuit, which relates to the field of direct current voltage withstanding tests, and comprises: the sampling module is used for acquiring sampling voltage through the voltage at the output end of the voltage withstanding test and outputting the sampling voltage to the main control module and the voltage comparison module; the main control module is used for calculating the voltage of the output end of the voltage withstanding test according to the sampling voltage and sending the voltage to the display module; the display module is used for displaying the voltage of the output end of the voltage withstanding test; the voltage comparison module is used for comparing the magnitude of the sampling voltage with the set voltage, and when the sampling voltage is large, the conduction module is conducted; compared with the prior art, the utility model has the beneficial effects that: aiming at the defects in the prior art, the utility model detects whether the voltage of the output end of the withstand voltage test exceeds 36V (human body safety voltage), and whether the disconnection is thorough or not, thereby preventing the danger of electric shock after an operator touches the circuit and ensuring that the output end has no voltage when the operator operates the circuit.
Description
Technical Field
The utility model relates to the field of direct-current voltage withstand test, in particular to a direct-current voltage withstand test output live indicating circuit.
Background
The voltage withstanding test is used for testing the voltage withstanding capability of various high-voltage and low-voltage electrical devices, insulating materials and insulating structures. The basic theory of the pressure resistance test is that a product is exposed to a severe environment, and if the product can maintain a normal condition under the severe environment, the product can be determined to work under the normal environment and can also maintain the normal condition. Different products have different specifications, and basically, a high voltage is applied to the product for a voltage withstand test, and the voltage must be maintained for a predetermined period of time. If the leakage current of a component is kept within a specified range within a specified time, the component can be determined to operate safely under normal conditions. Good design and selection of a good insulating material can protect the user.
In the prior art, a voltage sampling signal is amplified by an operational amplifier and then is sent to an MCU. The MCU is processed and then sent to the display, as shown in FIG. 1. After the test is finished, the MCU is reset, the A/D stops working, and the display screen is not displaying voltage.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to provide a dc voltage withstanding test output live indication circuit to solve the above problems in the prior art.
In order to achieve the purpose, the utility model provides the following technical scheme:
direct current withstand voltage test output live indicating circuit includes:
the sampling module is used for acquiring sampling voltage through the voltage at the output end of the voltage withstand test and outputting the sampling voltage to the main control module and the voltage comparison module;
the main control module is used for calculating the voltage of the output end of the withstand voltage test according to the sampling voltage and sending the voltage to the display module;
the display module is used for displaying the voltage magnitude of the output end of the voltage withstanding test;
the voltage comparison module is used for comparing the magnitude of the sampling voltage with the set voltage, and when the sampling voltage is large, the conduction module is conducted; when the sampling voltage is small, the conduction module is not conducted;
the conduction module is used for indicating the module to work when in conduction;
the indicating module is used for displaying that the voltage of the output end of the withstand voltage test exceeds a threshold value in a light-emitting manner; judging whether the voltage-withstanding test output end with the voltage exceeding the threshold is completely disconnected or not, and the voltage-withstanding test output end still emits light when the voltage-withstanding test output end is not completely disconnected;
the sampling module is connected with the main control module and the voltage comparison module, the main control module is connected with the display module, the voltage comparison module is connected with the conduction module, and the conduction module is connected with the indication module.
As a still further scheme of the utility model: the sampling module comprises a resistor R41, an amplifier IC5B, a resistor R40 and a capacitor C22, the resistor R41 is connected with the in-phase end of the amplifier IC5B, the inverting end of the amplifier IC5B is connected with the output end of the amplifier IC5B, the main control module and the resistor R40, the other end of the resistor R40 is connected with the capacitor C22 and the voltage comparison module, and the other end of the capacitor C22 is grounded.
As a still further scheme of the utility model: the voltage comparison module comprises an amplifier IC4A, a capacitor C11, a resistor R36, a resistor R31 and a potentiometer XL, one end of the potentiometer XL is grounded, the sliding end of the potentiometer XL is connected with the resistor R31 and the resistor R36, the other end of the resistor R31 is grounded, the other end of the resistor R36 is connected with the capacitor C11 and the in-phase end of the amplifier IC4A, the inverting end of the amplifier IC4A is connected with the sampling module, and the output end of the amplifier IC4A is connected with the conduction module.
As a still further scheme of the utility model: the conducting module comprises a resistor R59, a resistor R58 and a triode Q1, the base electrode of the triode Q1 is connected with the resistor R58, the other end of the resistor R58 is connected with the resistor R59 and the voltage comparison module, the other end of the resistor R59 is connected with 12V voltage, the collector electrode of the triode Q1 is grounded, and the emitter electrode of the triode Q1 is connected with the indication module.
As a still further scheme of the utility model: the indicating module comprises a Light Emitting Diode (LED) and a resistor R57, the negative electrode of the LED is connected with the conducting module, the positive electrode of the LED is connected with the resistor R57, and the other end of the resistor R57 is connected with 12V voltage.
Compared with the prior art, the utility model has the beneficial effects that: aiming at the defects in the prior art, the utility model detects whether the voltage of the output end of the withstand voltage test exceeds 36V (human body safety voltage), and whether the disconnection is thorough or not, thereby preventing the danger of electric shock after an operator touches the circuit and ensuring that the output end has no voltage when the operator operates the circuit.
Drawings
Fig. 1 is a circuit diagram of a conventional withstand voltage test indicating circuit.
Fig. 2 is a schematic diagram of a dc withstand voltage test output live indication circuit.
Fig. 3 is a circuit diagram of a dc withstand voltage test output live indication circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 2, the dc withstand voltage test output charging indicating circuit includes:
the sampling module is used for acquiring sampling voltage through the voltage at the output end of the voltage withstand test and outputting the sampling voltage to the main control module and the voltage comparison module;
the main control module is used for calculating the voltage of the output end of the withstand voltage test according to the sampling voltage and sending the voltage to the display module;
the display module is used for displaying the voltage magnitude of the output end of the voltage withstanding test;
the voltage comparison module is used for comparing the magnitude of the sampling voltage with the set voltage, and when the sampling voltage is large, the conduction module is conducted; when the sampling voltage is small, the conduction module is not conducted;
the conduction module is used for indicating the module to work when in conduction;
the indicating module is used for displaying that the voltage of the output end of the withstand voltage test exceeds a threshold value in a light-emitting manner; judging whether the voltage-withstanding test output end with the voltage exceeding the threshold is completely disconnected or not, and the voltage-withstanding test output end still emits light when the voltage-withstanding test output end is not completely disconnected;
the sampling module is connected with the main control module and the voltage comparison module, the main control module is connected with the display module, the voltage comparison module is connected with the conduction module, and the conduction module is connected with the indication module.
In this embodiment: referring to fig. 3, the sampling module includes a resistor R41, an amplifier IC5B, a resistor R40, and a capacitor C22, the resistor R41 is connected to the non-inverting terminal of the amplifier IC5B, the inverting terminal of the amplifier IC5B is connected to the output terminal of the amplifier IC5B, the main control module, and the resistor R40, the other end of the resistor R40 is connected to the capacitor C22 and the voltage comparison module, and the other end of the capacitor C22 is grounded.
When the voltage of the output end of the withstand voltage test exceeds 36V, the voltage is considered to exceed the threshold value, the resistor R41 samples the voltage of the output end of the withstand voltage test, and the voltage is finally output to the inverting end of the amplifier IC 4A.
In this embodiment: referring to fig. 3, the voltage comparison module includes an amplifier IC4A, a capacitor C11, a resistor R36, a resistor R31, and a potentiometer XL, wherein one end of the potentiometer XL is grounded, a sliding end of the potentiometer XL is connected to the resistor R31 and the resistor R36, the other end of the resistor R31 is grounded, the other end of the resistor R36 is connected to the capacitor C11 and a non-inverting end of the amplifier IC4A, an inverting end of the amplifier IC4A is connected to the sampling module, and an output end of the amplifier IC4A is connected to the conduction module.
The voltage of the in-phase end of the amplifier IC4A acquires a rated voltage, and when the voltage of the output end of the withstand voltage test is 36V, the rated voltage is equal to the sampling voltage, so that when the voltage of the output end of the withstand voltage test is more than 36V, the amplifier IC4A outputs a low level; when the voltage of the output end of the withstand voltage test is less than 36V, the amplifier IC4A outputs high level.
In this embodiment: referring to fig. 3, the conducting module includes a resistor R59, a resistor R58, and a transistor Q1, a base of the transistor Q1 is connected to the resistor R58, another end of the resistor R58 is connected to the resistor R59 and the voltage comparing module, another end of the resistor R59 is connected to the 12V voltage, a collector of the transistor Q1 is grounded, and an emitter of the transistor Q1 is connected to the indicating module.
The transistor Q1 is a PNP transistor, and is turned on when the base voltage is low, so that the transistor Q1 is turned on when the voltage of the output terminal of the withstand voltage test is greater than 36V.
In this embodiment: referring to fig. 3, the indication module includes a light emitting diode LED and a resistor R57, a cathode of the light emitting diode LED is connected to the conduction module, an anode of the light emitting diode LED is connected to the resistor R57, and the other end of the resistor R57 is connected to the 12V voltage.
After the triode Q1 is conducted, the branch circuit where the light-emitting diode LED is located is conducted, the light-emitting diode LED emits light to prompt a user that the voltage of the output end of the withstand voltage test is larger than 36V, and after the output end of the withstand voltage test is disconnected, the user can determine that the human body at the output end of the withstand voltage test is safe to directly contact with the human body (the human body safe voltage is 36V, so that if the output voltage of the output end of the withstand voltage test is lower than 36V, the human body cannot be harmed by the electricity.
The working principle of the utility model is as follows: sampling module obtains sampling voltage through the output voltage of withstand voltage test, host system calculates out withstand voltage test's output voltage according to sampling voltage, and send it to display module, display module shows withstand voltage test's output voltage size, voltage comparison module compares sampling voltage and the size of settlement voltage, when sampling voltage is big, the module that switches on, sampling voltage is hour, the module that switches on does not switch on, indicate module work after the module that switches on, luminous display withstand voltage test's output voltage surpasss the threshold value, judge whether the output breaks off completely after the output breaks off, it is still luminous to break off completely not, guarantee user's safety.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. Direct current withstand voltage test output is electrified indicating circuit, its characterized in that:
this direct current withstand voltage test outputs electrified indicating circuit includes:
the sampling module is used for acquiring sampling voltage through the voltage at the output end of the voltage withstand test and outputting the sampling voltage to the main control module and the voltage comparison module;
the main control module is used for calculating the voltage of the output end of the withstand voltage test according to the sampling voltage and sending the voltage to the display module;
the display module is used for displaying the voltage magnitude of the output end of the voltage withstanding test;
the voltage comparison module is used for comparing the magnitude of the sampling voltage with the set voltage, and when the sampling voltage is large, the conduction module is conducted; when the sampling voltage is small, the conduction module is not conducted;
the conduction module is used for indicating the module to work when in conduction;
the indicating module is used for displaying that the voltage of the output end of the withstand voltage test exceeds a threshold value in a light-emitting manner; judging whether the voltage-withstanding test output end with the voltage exceeding the threshold is completely disconnected or not, and the voltage-withstanding test output end still emits light when the voltage-withstanding test output end is not completely disconnected;
the sampling module is connected with the main control module and the voltage comparison module, the main control module is connected with the display module, the voltage comparison module is connected with the conduction module, and the conduction module is connected with the indication module.
2. The direct current voltage withstand test output live indicating circuit according to claim 1, wherein the sampling module comprises a resistor R41, an amplifier IC5B, a resistor R40 and a capacitor C22, the resistor R41 is connected with the in-phase end of the amplifier IC5B, the inverting end of the amplifier IC5B is connected with the output end of the amplifier IC5B, the main control module and the resistor R40, the other end of the resistor R40 is connected with the capacitor C22 and the voltage comparison module, and the other end of the capacitor C22 is grounded.
3. The direct current withstand voltage test output electrification indicating circuit according to claim 1, wherein the voltage comparison module comprises an amplifier IC4A, a capacitor C11, a resistor R36, a resistor R31 and a potentiometer XL, one end of the potentiometer XL is grounded, a sliding end of the potentiometer XL is connected with the resistor R31 and the resistor R36, the other end of the resistor R31 is grounded, the other end of the resistor R36 is connected with the capacitor C11 and the same-phase end of the amplifier IC4A, the reverse-phase end of the amplifier IC4A is connected with the sampling module, and the output end of the amplifier IC4A is connected with the conduction module.
4. The direct current voltage withstand test output live indicating circuit according to claim 1, wherein the conducting module comprises a resistor R59, a resistor R58, a transistor Q1, a base of the transistor Q1 is connected with the resistor R58, the other end of the resistor R58 is connected with the resistor R59 and the voltage comparing module, the other end of the resistor R59 is connected with 12V voltage, a collector of the transistor Q1 is grounded, and an emitter of the transistor Q1 is connected with the indicating module.
5. The DC withstand voltage test output live indicating circuit of claim 4, wherein the indicating module comprises a Light Emitting Diode (LED) and a resistor R57, the cathode of the LED is connected with the conducting module, the anode of the LED is connected with the resistor R57, and the other end of the resistor R57 is connected with 12V voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123049959.9U CN216560857U (en) | 2021-12-07 | 2021-12-07 | Direct current withstand voltage test output live indicating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123049959.9U CN216560857U (en) | 2021-12-07 | 2021-12-07 | Direct current withstand voltage test output live indicating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216560857U true CN216560857U (en) | 2022-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123049959.9U Active CN216560857U (en) | 2021-12-07 | 2021-12-07 | Direct current withstand voltage test output live indicating circuit |
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| Country | Link |
|---|---|
| CN (1) | CN216560857U (en) |
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2021
- 2021-12-07 CN CN202123049959.9U patent/CN216560857U/en active Active
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