Fuse fusing time detection circuit
By designing a fuse blow time detection circuit, the photoelectric characteristics of the optocoupler and transistor are used to achieve automated timing, which solves the problem of large manual timing error, improves the timing accuracy, and is suitable for industrial production.
Patent Information
- Application Number
- CN202420818940.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-04-19
AI Technical Summary
In the prior art, the fuse blowing time detection mainly relies on manual timing, which has large errors and difficult timing accuracy to meet standards, affecting industrial production.
A detection circuit including fuse, switch, optocoupler, transistor and timer is designed, and the photoelectric characteristics of the optocoupler and transistor are used to realize the automatic timing of the fuse blowing time, and the fuse time is recorded through the timer to improve the timing accuracy.
It realizes automatic timing of fuse blowing time, which has higher accuracy than manual timing, reduces errors, and is suitable for industrial production needs.
Smart Images
Figure CN222365084U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a detection circuit, in particular to a fuse fusing time detection circuit. Background Art
[0002] During the production process of fuses, due to the limitations of production process conditions, there is a possibility that the width of the produced fuse circuits may have errors. Therefore, the finished products usually need to be spot-checked to see if the fuse's fusing time meets the requirements. Currently, the fuse's fusing time is usually detected by manual timing. This method has a large detection error and the timing accuracy is difficult to meet the standard, which is not conducive to industrial production. Utility Model Content
[0003] In order to overcome the above defects, the utility model provides a fuse blowing time detection circuit, which has the advantages of automatic timing and high timing accuracy.
[0004] The utility model adopts a technical solution to solve the technical problem: a fuse fusing time detection circuit, comprising: a fuse F, a switch S, an optical coupler O, a transistor V, a timer T and a load RL, wherein the positive electrode of a power supply is connected to the positive electrode of the load RL, the negative electrode of the power supply is connected to the negative electrode of the load RL, the fuse F and the switch S are connected in series between the positive electrode of the power supply and the positive electrode of the load RL, the optical coupler O comprises a light emitting diode and a photosensitive diode, the positive electrode of the light emitting diode is connected to the positive electrode of the load RL, the negative electrode of the light emitting diode is connected to the negative electrode of the load RL, the positive electrode of the photosensitive diode is connected to the negative electrode of the power supply, the negative electrode of the photosensitive diode is connected to the positive electrode of the power supply, the emitter of the transistor V is connected to the positive electrode of the photosensitive diode, the base of the transistor V is connected to the negative electrode of the photosensitive diode, the collector of the transistor V is connected to the positive electrode of the power supply, and the timer T is connected to the emitter of the transistor V and the collector of the transistor V.
[0005] Optionally, an ammeter A is connected in series between the fuse F and the switch S.
[0006] Optionally, a first resistor R1 is connected in series between the positive electrode of the light-emitting diode and the positive electrode of the load RL, a second resistor R2 is connected in series between the base of the transistor V and the positive electrode of the power supply, and a third resistor R3 is connected in series between the collector of the transistor V and the positive electrode of the power supply.
[0007] Optionally, the resistance of the first resistor R1 is 5,600 ohms, the resistance of the second resistor R2 is 8,200 ohms, the resistance of the third resistor R3 is 4,700 ohms, the resistance of the load RL is 2 ohms, and the rated power of the load RL is 100 watts.
[0008] The beneficial technical effect of the utility model is: the fuse blowing time detection circuit includes: fuse F, switch S, optical coupler O, transistor V, timer T and load RL. When in use, the user turns on switch S, the light-emitting diode of optical coupler O emits light, and the photosensitive diode of optical coupler O turns on after receiving light. At this time, the base and emitter of transistor V are cut off, and the collector of transistor V is at a high level. At the same time, timer T starts timing until fuse F blows. At this time, the light-emitting diode of optical coupler O is turned off, the photosensitive diode of optical coupler O is cut off, and the base and emitter of transistor V are forward biased and turned on. At this time, timer T stops timing, realizing automatic timing of fuse T blowing time, which is more accurate than manual timing. It has the advantages of automatic timing and high timing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is the circuit diagram of the whole machine of the utility model; DETAILED DESCRIPTION
[0010] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.
[0011] This specific embodiment describes in detail the fuse blowing time detection circuit described in this application, such as Figure 1As shown, the fuse fusing time detection circuit includes: a fuse F, a switch S, an optical coupler O, a transistor V, a timer T and a load RL, the positive electrode of the power supply is connected to the positive electrode of the load RL, the negative electrode of the power supply is connected to the negative electrode of the load RL, the fuse F and the switch S are connected in series between the positive electrode of the power supply and the positive electrode of the load RL, the optical coupler O includes a light emitting diode and a photosensitive diode, the positive electrode of the light emitting diode is connected to the positive electrode of the load RL, the negative electrode of the light emitting diode is connected to the negative electrode of the load RL, the positive electrode of the photosensitive diode is connected to the negative electrode of the power supply, the negative electrode of the photosensitive diode is connected to the positive electrode of the power supply, the emitter of the transistor V is connected to the positive electrode of the photosensitive diode, the base of the transistor V is connected to the negative electrode of the photosensitive diode, the collector of the transistor V is connected to the positive electrode of the power supply, and the timer T is connected to the emitter of the transistor V and the collector of the transistor V. When in use, the user turns on the switch S, the light-emitting diode of the optical coupler O emits light, and the photosensitive diode of the optical coupler O is turned on after receiving the light. At this time, the base and emitter of the transistor V are cut off, and the collector of the transistor V is at a high level. At the same time, the timer T starts timing until the fuse F blows. At this time, the light-emitting diode of the optical coupler O is turned off, the photosensitive diode of the optical coupler O is cut off, and the base and emitter of the transistor V are forward biased and turned on. At this time, the timer T stops timing, realizing the automatic timing of the fuse T blowing time, which is more accurate than manual timing. It has the advantages of automatic timing and high timing accuracy. In this embodiment, the power supply is a DC power supply, and the timer T is an electronic timer in this embodiment. The timer T has its own storage device, which can record the blowing time of multiple fuses F. In this embodiment, the model of the optical coupler O is MCT2E, and the model of the transistor V is 2N2222.
[0012] In this embodiment, an ammeter A is optionally connected in series between the fuse F and the switch S. The ammeter A can detect the current value and record the maximum current value, so that the user can record the melting current of the fuse F. In this embodiment, the ammeter A is provided with a dial that can display the current value in real time.
[0013] In this embodiment, optionally, a first resistor R1 is connected in series between the positive electrode of the light-emitting diode and the positive electrode of the load RL, a second resistor R2 is connected in series between the base of the transistor V and the positive electrode of the power supply, and a third resistor R3 is connected in series between the collector of the transistor V and the positive electrode of the power supply. The first resistor R1 can protect the light-emitting diode from overload, and the second resistor R2 and the third resistor R3 can protect the transistor V from overload.
[0014] Optionally in this embodiment, the resistance of the first resistor R1 is 5,600 ohms, the resistance of the second resistor R2 is 8,200 ohms, the resistance of the third resistor R3 is 4,700 ohms, the resistance of the load RL is 2 ohms, and the rated power of the load RL is 100 watts.
[0015] The fuse blowing time detection circuit in this embodiment has the advantages of automatic timing and high timing accuracy.
Claims
1. A fuse blowing time detection circuit, characterized in that: include: Fuse F, switch S, optocoupler O, transistor V, timer T and load RL, the positive electrode of the power supply is connected to the positive electrode of the load RL, the negative electrode of the power supply is connected to the negative electrode of the load RL, the fuse F and switch S are connected in series between the positive electrode of the power supply and the positive electrode of the load RL, the optocoupler O comprises a light emitting diode and a photosensitive diode, the positive electrode of the light emitting diode is connected to the positive electrode of the load RL, the negative electrode of the light emitting diode is connected to the negative electrode of the load RL, the positive electrode of the photosensitive diode is connected to the negative electrode of the power supply, the negative electrode of the photosensitive diode is connected to the positive electrode of the power supply, the emitter of the transistor V is connected to the positive electrode of the photosensitive diode, the base of the transistor V is connected to the negative electrode of the photosensitive diode, the collector of the transistor V is connected to the positive electrode of the power supply, and the timer T is connected to the emitter of the transistor V and the collector of the transistor V.
2. The fuse blowing time detection circuit according to claim 1, characterized in that: An ammeter A is connected in series between the fuse F and the switch S.
3. The fuse blowing time detection circuit according to claim 1, characterized in that: A first resistor R1 is connected in series between the positive electrode of the light emitting diode and the positive electrode of the load RL, a second resistor R2 is connected in series between the base of the transistor V and the positive electrode of the power supply, and a third resistor R3 is connected in series between the collector of the transistor V and the positive electrode of the power supply.
4. The fuse blowing time detection circuit according to claim 3, characterized in that: The resistance value of the first resistor R1 is 5,600 ohms, the resistance value of the second resistor R2 is 8,200 ohms, the resistance value of the third resistor R3 is 4,700 ohms, the resistance value of the load RL is 2 ohms, and the rated power of the load RL is 100 watts.