Product aging abnormity detection circuit

Abstract

The utility model discloses a product aging abnormity detection circuit comprising a power supply used for supplying power to a product to be aged; the power-on indicating circuit is connected in series between the power supply and the to-be-aged product, the power-on indicating circuit is provided with an indicating lamp, and the indicating lamp is used for lighting when the to-be-aged product is in an access state; and the short circuit alarm circuit is connected in series between the power supply and the to-be-aged product, the short circuit alarm circuit is provided with a buzzer, and the buzzer is used for buzzing and alarming under the condition that the sampling current of the to-be-aged product is greater than a preset threshold value. According to the utility model, the indicating lamp is turned on when the product to be aged is in an access state, and the buzzer performs buzzing alarm when the sampling current of the product to be aged is greater than the preset threshold value, so that the aging efficiency and safety of the product can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to product aging technical field, especially a product aging abnormality detection circuit. BACKGROUND

[0002] The common practice of the existing network camera (IP Camera, IPC) module in production aging is to check the product power-on current whether abnormal on the 12V power supply line by connecting the ammeter in series, which depends on manual time or time to check each product, not only high cost, but also can not find abnormality in time, and it is difficult to find the product short circuit problem in the aging process, which is easy to cause fire. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art is solved, and for this purpose, the utility model provides a product aging abnormality detection circuit, and the indicator light is lighted under the access state of the product to be aged, and the buzzer carries out the buzzer alarm under the condition that the sampling current of the product to be aged is greater than the preset threshold value, which can improve the efficiency and safety of product aging.

[0004] The product aging abnormality detection circuit according to the utility model embodiment comprises:

[0005] A power supply is used to supply power for the product to be aged.

[0006] A power-on indication circuit is connected in series between the power supply and the product to be aged, and the power-on indication circuit has an indicator light, and the indicator light is used to light under the access state of the product to be aged.

[0007] A short circuit alarm circuit is connected in series between the power supply and the product to be aged, and the short circuit alarm circuit has a buzzer, and the buzzer is used to carry out the buzzer alarm under the condition that the sampling current of the product to be aged is greater than the preset threshold value.

[0008] The product aging abnormality detection circuit according to the utility model embodiment has at least the following beneficial effects:

[0009] The power supply is used to supply power for the product to be aged, and the product to be aged can be aged, the power-on indication circuit can light under the access state of the product to be aged, and the product to be aged is indicated to be aging, the short circuit alarm circuit can monitor whether the product to be aged is short-circuited in the aging process, and the buzzer alarm is carried out under the condition that the sampling current of the product to be aged is greater than the preset threshold value, so that timely processing is obtained, and fire is avoided.

[0010] According to some embodiments of the utility model, the power-on indication circuit comprises:

[0011] A first sampling resistor has one end connected to the power supply and the other end connected to the product to be aged;

[0012] A first comparator has a first detection voltage input end, a first reference voltage input end and a first output end, the first detection voltage input end being connected to the other end of the first sampling resistor;

[0013] A first switch tube has a first control end, a first connection end and a second connection end, the first control end being connected to the first output end, and the first connection end being used for connecting the ground wire;

[0014] A first resistor has one end connected to the second connection end;

[0015] The positive pole of the indicator lamp is used for connecting the power supply, and the negative pole is connected to the other end of the first resistor;

[0016] A first reference voltage circuit is connected to the first reference voltage input end.

[0017] According to some embodiments of the present application, the first switch tube is a first MOS tube, the gate of the first MOS tube being connected to the first output end, the source being used for connecting the ground wire, and the drain being connected to the one end of the first resistor.

[0018] According to some embodiments of the present application, the first reference voltage circuit comprises:

[0019] A first reference resistor has one end connected to the power supply and the other end connected to the first reference voltage input end;

[0020] A second reference resistor has one end connected to the ground wire and the other end connected to the other end of the first reference resistor and the first reference voltage input end respectively.

[0021] According to some embodiments of the present application, the resistance value of the first sampling resistor is 10 ohms, the resistance value of the first reference resistor is 100 ohms, and the resistance value of the second reference resistor is 4.7 kilo-ohms.

[0022] According to some embodiments of the present application, the indicator lamp is an LED.

[0023] According to some embodiments of the present application, the short circuit alarm circuit comprises:

[0024] A second sampling resistor has one end connected to the power supply and the other end connected to the product to be aged;

[0025] A second comparator has a second detection voltage input end, a second reference voltage input end and a second output end, the second detection voltage input end is connected with the one end of the second sampling resistor;

[0026] A second switch tube has a second control end, a third connection end and a fourth connection end, the second control end is connected with the second output end, the third connection end is used for connecting the ground wire;

[0027] A second resistor has one end connected with the fourth connection end;

[0028] The positive pole of the buzzer is used for connecting the power supply, and the negative pole is connected with the other end of the second resistor;

[0029] A second reference voltage circuit is connected with the second reference voltage input end.

[0030] According to some embodiments of the utility model, the second switch tube adopts a second MOS tube, the gate of the second MOS tube is connected with the second output end, the source is used for connecting the ground wire, and the drain is connected with the one end of the second resistor.

[0031] According to some embodiments of the utility model, the second reference voltage circuit comprises:

[0032] A third reference resistor has one end connected with the power supply and the other end connected with the second reference voltage input end;

[0033] A fourth reference resistor has one end connected with the ground wire and the other end connected with the other end of the third reference resistor and the second reference voltage input end respectively.

[0034] According to some embodiments of the utility model, the resistance value of the second sampling resistor is 10 ohms, the resistance value of the third reference resistor is 2 kilo-ohms, and the resistance value of the fourth reference resistor is 4.7 kilo-ohms.

[0035] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0036] The utility model will be further explained in combination with the drawings and embodiments, wherein:

[0037] Figure 1 It is the electrical schematic diagram of the product aging abnormality detection circuit of one embodiment of the utility model.

[0038] Reference signs:

[0039] A power supply 100;

[0040] to-be-aged product 200;

[0041] power-on indication circuit 300;

[0042] short-circuit alarm circuit 400. DETAILED DESCRIPTION

[0043] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explaining the present application, and should not be understood as a limitation of the present application.

[0044] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0045] In the description of the present application, the plural refers to two or more. If there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the sequence of technical features indicated.

[0046] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0047] The following will be combined Figure 1 The product aging abnormality detection circuit of the embodiments of the present application will be described clearly and completely, obviously, the following described embodiments are part of the embodiments of the present application, not all embodiments.

[0048] Reference Figure 1 , Figure 1 is the electrical schematic diagram of the product aging abnormality detection circuit of an embodiment of the present application.

[0049] According to the product aging abnormality detection circuit of the embodiments of the present application, the product aging abnormality detection circuit comprises a power supply 100, a power-on indication circuit 300 and a short-circuit alarm circuit 400.

[0050] The power supply 100 is used for supplying power for the to-be-aged product 200;

[0051] The power-on indication circuit 300 is connected in series between the power supply 100 and the product to be aged 200, and the power-on indication circuit 300 has an indicating lamp for lighting when the product to be aged 200 is in the connected state.

[0052] The short-circuit alarm circuit 400 is connected in series between the power supply 100 and the product to be aged 200, and the short-circuit alarm circuit 400 has a buzzer for alarming when the sampling current of the product to be aged 200 is greater than a preset threshold.

[0053] In some embodiments of the utility model, the power supply 100 adopts a high-power 12V power adapter. The product to be aged 200 is a camera (IPC). The power-on indication circuit 300 and the short-circuit alarm circuit 400 are connected in series between the power adapter and the camera (IPC). When there is no camera connected, the power-on indication circuit 300 has no voltage change, and the indicating lamp is not lit. When the camera is connected, the indicating lamp is lit, indicating that the camera is being aged. The short-circuit alarm circuit 400 detects whether the sampling current of the camera is greater than a preset threshold. If it is greater, the buzzer alarms. If it is not greater, it does not sound.

[0054] In some embodiments of the utility model, with reference to Figure 1 , the power-on indication circuit 300 comprises a first sampling resistor R1, a first comparator U1, a first switch tube Q1, a first resistor R5, an indicating lamp and a first reference voltage circuit.

[0055] The first sampling resistor R1 has one end connected with the power supply 100 and the other end connected with the product to be aged 200.

[0056] The first comparator U1 has a first detection voltage input end, a first reference voltage input end and a first output end, and the first detection voltage input end is connected with the other end of the first sampling resistor R1.

[0057] The first switch tube Q1 has a first control end, a first connection end and a second connection end, the first control end is connected with the first output end, and the first connection end is used for connecting the ground wire.

[0058] The first resistor R5 has one end connected with the second connection end.

[0059] The indicating lamp has a positive electrode for connecting the power supply 100 and a negative electrode connected with the other end of the first resistor R5.

[0060] The first reference voltage circuit is connected with the first reference voltage input end.

[0061] In some embodiments of the utility model, with reference to Figure 1 , the first reference voltage circuit comprises a first reference resistor R3 and a second reference resistor R4.

[0062] a first reference resistor R3, one end of which is connected with the power supply 100, and the other end of which is connected with the first reference voltage input end;

[0063] a second reference resistor R4, one end of which is connected with the ground wire, and the other end of which is connected with the other end of the first reference resistor R3 and the first reference voltage input end respectively.

[0064] In some embodiments of the present application, the reference Figure 1 , the resistance value of the first sampling resistor R1 is 10 ohms, the resistance value of the first reference resistor R3 is 100 ohms, and the resistance value of the second reference resistor R4 is 4.7 kilo-ohms.

[0065] The first sampling resistor R1 is connected in series on the power line, and the connection of the product to be aged 200 will generate a voltage drop. When the product to be aged 200 is not connected to the power supply, V2>V1, the first comparator U1 outputs a low level, the first switch tube Q1 is not connected, and the indicator light is not lit. After connecting the product to be aged 200, V2V1, the first comparator U1 outputs a high level, the first switch tube Q1 is turned on, and the indicator light is lit.

[0066] It should be noted that the specific resistance values of the first sampling resistor R1, the first reference resistor R3 and the second reference resistor R4 cannot be regarded as a limitation of the present application, and other resistance values can also be selected according to actual conditions.

[0067] In some embodiments of the present application, the reference Figure 1 , the first switch tube Q1 adopts a first MOS tube, the gate of the first MOS tube is connected with the first output end, the source is used for connecting the ground wire, and the drain is connected with one end of the first resistor R5. The MOS tube has a low on-resistance and a fast switching speed, can complete the conversion of the on and off states in a short time, and can reduce the switching loss. The input impedance of the MOS tube is high, the driving power is small, the excitation signal will not produce voltage drop, the voltage can be driven, the sensitivity is high, the response speed of the indicator light can be accelerated. The gate input capacitance of the MOS tube is small, which can be controlled by a low-power driving circuit, thereby reducing the power consumption of the control circuit. The MOS tube will not appear secondary breakdown phenomenon at high temperature, has negative temperature current characteristics, and is pure resistance after conduction. The MOS tube does not contain mechanical moving parts, so it has a long service life and high reliability, and is suitable for long-term stable work. The packaging structure of the MOS tube is compact, small in size, and suitable for high-density circuit board design and compact power supply design. In addition, with the development of technology and the increase of market demand, the production cost of the MOS tube is relatively low.

[0068] In some embodiments of the present application, the reference Figure 1The indicator light adopts LED. The LED has high light emitting efficiency, can provide brighter light, and consumes less electric energy. The circuit design of the LED is simple, convenient to use, and facilitates installation and maintenance. The LED can be conveniently controlled in optics. The LED has long service life.

[0069] It should be noted that other light emitting devices can also be used for the indicator light, and this cannot be regarded as a limitation of the utility model.

[0070] In some embodiments of the utility model, reference Figure 1 The short circuit alarm circuit 400 comprises a second sampling resistor R2, a second comparator U2, a second switch tube Q2, a second resistor R6, a buzzer and a second reference voltage circuit.

[0071] The second sampling resistor R2 has one end connected with the power supply 100 and the other end connected with the product to be aged 200;

[0072] The second comparator U2 has a second detection voltage input end, a second reference voltage input end and a second output end, and the second detection voltage input end is connected with one end of the second sampling resistor R2;

[0073] The second switch tube Q2 has a second control end, a third connection end and a fourth connection end, the second control end is connected with the second output end, and the third connection end is used for connecting the ground wire;

[0074] The second resistor R6 has one end connected with the fourth connection end;

[0075] The buzzer has a positive electrode used for connecting the power supply 100 and a negative electrode connected with the other end of the second resistor R6;

[0076] The second reference voltage circuit is connected with the second reference voltage input end.

[0077] In some embodiments of the utility model, reference Figure 1 The second reference voltage circuit comprises a third reference resistor R7 and a fourth reference resistor R8.

[0078] The third reference resistor R7 has one end connected with the power supply 100 and the other end connected with the second reference voltage input end;

[0079] The fourth reference resistor R8 has one end connected with the ground wire and the other end connected with the other end of the third reference resistor R7 and the second reference voltage input end respectively.

[0080] In some embodiments of the utility model, reference Figure 1 The resistance value of the second sampling resistor R2 is 10 ohms, the resistance value of the third reference resistor R7 is 2 kilo-ohms, and the resistance value of the fourth reference resistor R8 is 4.7 kilo-ohms.

[0081] The second sampling resistor R2 is connected in series on the power supply line, and a voltage drop is generated when the to-be-aged product 200 is connected. When the sampling current of the to-be-aged product 200 is normal, V4>V3, the second comparator U2 outputs a low level, the second switch tube Q2 is not turned on, and the buzzer does not sound. When the sampling current of the to-be-aged product 200 is too large and exceeds the preset threshold, V4V3, the second comparator U2 outputs a high level, the second switch tube Q2 is turned on, and the buzzer sounds.

[0082] It should be noted that the specific resistance values of the second sampling resistor R2, the third reference resistor R7 and the fourth reference resistor R8 cannot be regarded as a limitation of the utility model, and other resistance values can also be selected according to actual conditions.

[0083] In some embodiments of the utility model, the reference Figure 1 The second switch tube Q2 adopts a second MOS tube, the gate of the second MOS tube is connected with the second output end, the source is used for connecting the ground wire, and the drain is connected with one end of the second resistor R6. The MOS tube has a low conduction resistance and a fast switching speed, can complete the conversion of the conduction and cutoff states in a short time, and can reduce the switching loss. The MOS tube has a high input impedance and a small driving power, will not cause a voltage drop to the excitation signal, can be driven by voltage, has a high sensitivity, and can accelerate the response speed of the buzzer. The gate input capacitance of the MOS tube is small, can be controlled by a low-power driving circuit, thereby reducing the power consumption of the control circuit. The MOS tube will not appear secondary breakdown at high temperature, has a negative temperature current characteristic, and is purely resistive after conduction. The MOS tube does not contain mechanical moving parts, has a long service life and high reliability, and is suitable for long-time stable work. The packaging structure of the MOS tube is compact, small in size, and suitable for high-density circuit board design and compact power supply design. In addition, with the development of technology and the increase of market demand, the production cost of the MOS tube is relatively low.

[0084] The product aging abnormality detection circuit according to the utility model embodiment can supply power for the to-be-aged product 200 through the power supply 100, can age the to-be-aged product 200, can light up when the to-be-aged product 200 is in the connected state through the power-on indication circuit 300, indicates that the to-be-aged product 200 is being aged, can monitor whether the to-be-aged product 200 is short-circuited in the aging process through the short-circuit alarm circuit 400, and alarms through the buzzer when the sampling current of the to-be-aged product 200 is greater than the preset threshold, so that timely processing is obtained and a fire is avoided.

[0085] The utility model is described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled persons in the technical field without departing from the purpose of the utility model.

Claims

1. A product abnormal aging detection circuit characterized by comprising: The application relates to an aging device for products, which comprises: a power supply for supplying power to the products to be aged; a power-on indication circuit connected in series between the power supply and the products to be aged, the power-on indication circuit being provided with an indicator lamp for lighting up when the products to be aged are in an access state; a short-circuit alarm circuit connected in series between the power supply and the products to be aged, the short-circuit alarm circuit being provided with a buzzer for buzzing alarm when the sampling current of the products to be aged is greater than a preset threshold value.

2. The product aging anomaly detection circuit according to claim 1, characterized by, The power-on indication circuit comprises: a first sampling resistor having one end connected with the power supply and the other end connected with the products to be aged; a first comparator having a first detection voltage input end, a first reference voltage input end and a first output end, the first detection voltage input end being connected with the other end of the first sampling resistor; a first switch tube having a first control end, a first connection end and a second connection end, the first control end being connected with the first output end, the first connection end being used for connecting a ground wire; a first resistor having one end connected with the second connection end; the indicator lamp having a positive electrode used for connecting the power supply and a negative electrode connected with the other end of the first resistor; a first reference voltage circuit connected with the first reference voltage input end.

3. The product aging anomaly detection circuit according to claim 2, characterized by, The first switch tube is a first MOS tube, the gate of the first MOS tube being connected with the first output end, the source being used for connecting the ground wire, and the drain being connected with the one end of the first resistor.

4. The product aging anomaly detection circuit according to claim 2, characterized by, The first reference voltage circuit comprises: a first reference resistor having one end connected with the power supply and the other end connected with the first reference voltage input end; a second reference resistor having one end connected with the ground wire and the other end connected with the other end of the first reference resistor and the first reference voltage input end respectively.

5. The product aging anomaly detection circuit according to claim 4, characterized by, The resistance value of the first sampling resistor is 10 ohms, the resistance value of the first reference resistor is 100 ohms, and the resistance value of the second reference resistor is 4.7 kilo-ohms.

6. The product abnormal aging detection circuit according to claim 1 or 2, characterized by, The indicator lamp is an LED.

7. The product aging anomaly detection circuit according to claim 1, characterized by, The short-circuit alarm circuit comprises: a second sampling resistor having one end connected with the power supply and the other end connected with the products to be aged; a second comparator having a second detection voltage input end, a second reference voltage input end and a second output end, the second detection voltage input end being connected with the one end of the second sampling resistor; a second switch tube having a second control end, a third connection end and a fourth connection end, the second control end being connected with the second output end, and the third connection end being used for connecting a ground wire; a second resistor having one end connected with the fourth connection end; the buzzer having a positive electrode used for connecting the power supply and a negative electrode connected with the other end of the second resistor; a second reference voltage circuit connected with the second reference voltage input end.

8. The product aging anomaly detection circuit according to claim 7, characterized by, The second switch tube is a second MOS tube, the gate of the second MOS tube being connected with the second output end, the source being used for connecting the ground wire, and the drain being connected with the one end of the second resistor.

9. The product aging anomaly detection circuit according to claim 7, characterized by, The second reference voltage circuit comprises: a third reference resistor, one end of which is connected with the power supply and the other end of which is connected with the second reference voltage input end; a fourth reference resistor, one end of which is connected with the ground wire and the other end of which is connected with the other end of the third reference resistor and the second reference voltage input end respectively.

10. The product aging anomaly detection circuit according to claim 9, characterized by, The resistance value of the second sampling resistor is 10 ohms, the resistance value of the third reference resistor is 2 kilo-ohms, and the resistance value of the fourth reference resistor is 4.7 kilo-ohms.

Images