CN221281163U - Relay actuation detection circuit - Google Patents
Relay actuation detection circuit Download PDFInfo
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- CN221281163U CN221281163U CN202322901241.0U CN202322901241U CN221281163U CN 221281163 U CN221281163 U CN 221281163U CN 202322901241 U CN202322901241 U CN 202322901241U CN 221281163 U CN221281163 U CN 221281163U
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- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 230000003287 optical effect Effects 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract description 9
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The utility model relates to the technical field of relay ageing tests, in particular to a relay actuation detection circuit. It comprises the following steps: a relay including an electromagnetic portion and a switching portion; the switch part is connected with a power supply unit and a counting trigger unit, the power supply unit is electrically connected with the counting trigger unit through the switch part, and the counting trigger unit externally transmits a trigger level; the electromagnetic part is connected with a power supply and a switch unit, and the switch unit controls the power supply to supply power to the electromagnetic part; the control end of the switch unit is connected with a pulse circuit. According to the utility model, the relay is triggered to be switched on or off through the pulse circuit, and the switching on or off of the relay is fed back through the optocoupler so as to acquire the switching on frequency of the relay, so that the ageing degree of the relay is effectively detected.
Description
Technical Field
The utility model relates to the technical field of relay ageing tests, in particular to a relay actuation detection circuit.
Background
The relay is an important component in the intelligent switch, the service life of the relay directly influences the quality of the intelligent switch, so that ageing test is required to be carried out on parameters such as the service life of the relay before delivery, ageing test equipment aiming at the relay is currently on the market, during the test, a switch part of the relay is connected with a detection lamp in series to form a loop, and then the change in the ageing test is observed through manual staring at the detection lamp; however, when the relay is detected, whether the number of times of the suction of the relay is matched with the number of times of the power failure of the controlled relay cannot be displayed, so that the ageing condition of the relay cannot be accurately fed back.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a relay actuation detection circuit which can assist in detecting that the actuation frequency and the power-off frequency of a relay are the same so as to improve the accuracy of ageing detection.
A relay actuation detection circuit, comprising: a relay including an electromagnetic portion and a switching portion; the switch part is connected with a power supply unit and a counting trigger unit, the power supply unit is electrically connected with the counting trigger unit through the switch part, and the counting trigger unit externally transmits a trigger level;
The electromagnetic part is connected with a power supply and a switch unit, and the switch unit controls the power supply to supply power to the electromagnetic part; the control end of the switch unit is connected with a pulse circuit.
Further, the switch unit comprises a triode Q1, and the base electrode of the triode Q1 is connected with the pulse circuit through a resistor R2; the emitter of the triode Q1 is grounded and connected with the base through a resistor R1; the collector of the triode Q1 is connected with a power supply, and the power supply is grounded through an electromagnetic part.
Of course, other circuit configurations may be used, such as: the switching unit comprises a triode Q1, and the base electrode of the triode Q1 is connected with the pulse circuit through a resistor R2; the emitter of the triode Q1 is grounded and connected with the base through a resistor R1; the collector of the triode Q1 is sequentially connected with the electromagnetic part and the power supply.
When the pulse circuit controls the on and off of the triode Q1, the state of the triode Q1 controls whether the electromagnetic part is electrified, so that the on state of the control switch part is achieved.
Further, the power supply unit comprises a rectifying unit, one end of the switch part is connected with the live wire, the other end of the switch part is connected with the rectifying unit, and the rectifying unit is connected with the counting unit through a current limiting resistor R3 and a current limiting resistor R4 which are connected in series.
Preferably, the rectifying unit comprises a rectifying diode D2 or a rectifying bridge.
Further, the counting triggering unit comprises an optical coupler U1, and two ends of a light-emitting part of the optical coupler U1 are respectively connected with an output end of the resistor R4 and a zero line; one end of a light receiving part of the optical coupler U1 is connected with a power supply VC through a resistor R5 and is connected with a signal transmitting end RE1; the other end of the light receiving part is grounded, and the output end of the resistor R5 is grounded through a capacitor C1.
Further, the device also comprises a count display circuit; the counting display circuit comprises two four-bit cathode nixie tubes and a TM1650 chip, and the counting trigger unit comprises an MCU which is electrically connected with the TM1650 chip; the TM1650 chip was electrically connected to the cathode nixie tube.
The utility model has the beneficial effects that: according to the utility model, the relay is triggered to be switched on or off through the pulse circuit, and the switching on or off of the relay is fed back through the optocoupler so as to acquire the switching on frequency of the relay, so that the ageing degree of the relay is effectively detected.
Drawings
Fig. 1 is a schematic circuit diagram of the present embodiment.
Detailed Description
The utility model is described in detail below with reference to the accompanying drawings. As shown in fig. 1.
Example 1: a relay actuation detection circuit, comprising: a relay including an electromagnetic portion and a switching portion; the switch part is connected with a power supply unit and a counting trigger unit, the power supply unit is electrically connected with the counting trigger unit through the switch part, and the counting trigger unit externally transmits a trigger level;
The electromagnetic part is connected with a power supply and a switch unit, and the switch unit controls the power supply to supply power to the electromagnetic part; the control end of the switch unit is connected with a pulse circuit.
The pulse circuit is an existing circuit and is used for controlling the on-off frequency of the relay; the on-off frequency of the switch unit is controlled through the pulse circuit, so that the on-off frequency of the electromagnetic part is controlled; the on-off frequency of the switch unit is controlled. The pulse circuit is a rectangular wave generating circuit. When the control end of the switch unit receives the high level or the low level of the pulse circuit, the switch unit is turned into an on or off state, the electromagnetic part is in a working or stopping state, the switch part is correspondingly in an on or off state, and the counting trigger unit outputs the high level or the low level outwards; the output end of the counting triggering unit can be connected with the signal detection end of the CPU when in actual application, and the signal detection end detects the frequency of level signal change, namely the frequency of relay actuation disconnection. When the level output by the counting triggering unit is changed from low level to high level or from high level to low level, the count is increased by 1, and the counting is accumulated.
Further, the switch unit comprises a triode Q1, and the base electrode of the triode Q1 is connected with the pulse circuit through a resistor R2; the emitter of the triode Q1 is grounded and connected with the base through a resistor R1; the collector of the triode Q1 is connected with a power supply, and the power supply is grounded through an electromagnetic part.
Normally, the electromagnetic part is electrified to attract the switch part, and the switch part is conducted; when the pulse circuit has high level, the base potential of the triode Q1 becomes high, and the triode Q1 is conducted; the power supply is directly grounded through the triode Q1, the electromagnetic part is short-circuited, no current basically passes through, and the switch part is disconnected; when the pulse circuit changes to a low level, the base potential of the triode Q1 is reduced, and the triode Q1 is cut off; the power supply is grounded through the electromagnetic part, the electromagnetic part works, and the switch part is closed and conducted.
Of course, other circuit configurations may be used, such as: the switching unit comprises a triode Q1, and the base electrode of the triode Q1 is connected with the pulse circuit through a resistor R2; the emitter of the triode Q1 is grounded and connected with the base through a resistor R1; the collector of the triode Q1 is sequentially connected with the electromagnetic part and the power supply.
When the pulse circuit controls the on and off of the triode Q1, the state of the triode Q1 controls whether the electromagnetic part is electrified, so that the on state of the control switch part is achieved.
Further, the power supply unit comprises a rectifying unit, one end of the switch part is connected with the live wire, the other end of the switch part is connected with the rectifying unit, and the rectifying unit is connected with the counting unit through a current limiting resistor R3 and a current limiting resistor R4 which are connected in series.
Preferably, the rectifying unit comprises a rectifying diode D2 or a rectifying bridge.
Considering the occasion that the relay was used, its switch portion is generally used for controlling the break-make of live wire, consequently the power supply unit still adopts the live wire in this technical scheme, and the live wire provides alternating current, then forms direct current through rectifying element rectification. The current limiting resistor R3 and the current limiting resistor R4 are used for reducing current in the circuit, and the counting unit counts through potential change of the detection end; this is prior art.
Further, the counting triggering unit comprises an optical coupler U1, and two ends of a light-emitting part of the optical coupler U1 are respectively connected with an output end of the resistor R4 and a zero line; one end of a light receiving part of the optical coupler U1 is connected with a power supply VC through a resistor R5 and is connected with a signal transmitting end RE1; the other end of the light receiving part is grounded, and the output end of the resistor R5 is grounded through a capacitor C1.
The voltage of the power supply unit is larger, so that the detection is not suitable for direct; the optocoupler U1 is arranged to carry out photoelectric isolation, so that the detection part is prevented from being impacted, and when the optocoupler works, the signal transmitting end RE1 is at a low level; when the optocoupler does not work, the signal transmitting terminal RE1 is at a high level.
Further, the device also comprises a count display circuit; the counting display circuit comprises two four-bit cathode nixie tubes and a TM1650 chip, and the counting trigger unit comprises an MCU which is electrically connected with the TM1650 chip; the TM1650 chip was electrically connected to the cathode nixie tube.
The detection end of the MCU receives the high and low levels, then the relay actuation times are counted according to the high and low level signals, signals are sent to the TM1650, and the TM1650 controls the cathode nixie tube to display. This is not described in detail in the prior art.
The foregoing is merely exemplary of the utility model, and those skilled in the art will recognize that the utility model is not limited thereto, except insofar as modifications may be made by those skilled in the art in light of the teachings of the utility model.
Claims (6)
1. A relay actuation detection circuit, comprising: a relay including an electromagnetic portion and a switching portion; the method is characterized in that:
The switch part is connected with a power supply unit and a counting trigger unit, the power supply unit is electrically connected with the counting trigger unit through the switch part, and the counting trigger unit externally transmits a trigger level;
The electromagnetic part is connected with a power supply and a switch unit, and the switch unit controls the power supply to supply power to the electromagnetic part; the control end of the switch unit is connected with a pulse circuit.
2. The relay actuation detection circuit of claim 1, wherein: the switching unit comprises a triode Q1, and the base electrode of the triode Q1 is connected with the pulse circuit through a resistor R2; the emitter of the triode Q1 is grounded and connected with the base through a resistor R1; the collector of the triode Q1 is connected with a power supply, and the power supply is grounded through an electromagnetic part.
3. The relay actuation detection circuit of claim 1, wherein: the power supply unit comprises a rectifying unit, one end of the switch part is connected with the live wire, the other end of the switch part is connected with the rectifying unit, and the rectifying unit is connected with the counting unit through a current limiting resistor R3 and a current limiting resistor R4 which are connected in series.
4. A relay actuation detection circuit according to claim 3, wherein: the rectifying unit includes a rectifying diode D2 or a rectifying bridge.
5. A relay actuation detection circuit according to claim 3, wherein: the counting triggering unit comprises an optical coupler U1, and two ends of a light-emitting part of the optical coupler U1 are respectively connected with the output end of the resistor R4 and a zero line; one end of a light receiving part of the optical coupler U1 is connected with a power supply VC through a resistor R5 and is connected with a signal transmitting end RE1; the other end of the light receiving part is grounded, and the output end of the resistor R5 is grounded through a capacitor C1.
6. The relay actuation detection circuit of claim 1, wherein: the device also comprises a counting display circuit; the counting display circuit comprises two four-bit cathode nixie tubes and a TM1650 chip, and the counting trigger unit comprises an MCU which is electrically connected with the TM1650 chip; the TM1650 chip was electrically connected to the cathode nixie tube.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221281163U true CN221281163U (en) | 2024-07-05 |
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