CN220709305U - Relay state detection circuit for ammeter - Google Patents
Relay state detection circuit for ammeter Download PDFInfo
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- CN220709305U CN220709305U CN202321797996.4U CN202321797996U CN220709305U CN 220709305 U CN220709305 U CN 220709305U CN 202321797996 U CN202321797996 U CN 202321797996U CN 220709305 U CN220709305 U CN 220709305U
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- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 238000004353 relayed correlation spectroscopy Methods 0.000 claims abstract description 28
- 239000003990 capacitor Substances 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims 2
- 230000003287 optical effect Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of ammeter communication, and discloses a RELAY state detection circuit for an ammeter, which comprises a RELAY RELAY1, wherein a second pin of a switch K1 of the RELAY RELAY1 is connected with one end of a first resistor R1, the other end of the first resistor R2 is connected with one end of a second resistor R2, the other end of the second resistor R2 is connected with one end of a third resistor R3, the other end of the third resistor R3 is connected with one end of a fourth resistor R4, the other end of the fourth resistor R4 is connected with a cathode of a first diode D1 and a first pin of a second optocoupler U2, and the second pin of the second optocoupler U2 and an anode of the first diode D1 are connected with a zero line end of the RELAY; the utility model can accurately complete the detection of the state of the relay switch according to the high and low levels output by the relay signal pin through simple electronic device connection, and has ideal effect.
Description
Technical Field
The utility model relates to the technical field of ammeter relay detection, in particular to a relay state detection circuit for an ammeter.
Background
The relay is widely applied in the field of electric meters, along with the industrial development and the increasing complexity of the running environments of the electric meters and the like, people put forward higher requirements on devices such as the electric meters and the like, wherein the devices are required to detect the state of the relay, but the existing detection circuit is relatively complex, the circuit devices are more, most of the circuit devices are required to be configured with corresponding control cabinets/systems and the like to be completed, and the relay is not applicable to the field of the electric meters and is not ideal in effect.
Disclosure of Invention
The utility model aims to provide a relay state detection circuit for an ammeter, which is used for solving the problems in the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a RELAY state detection circuit for ammeter, including RELAY RELAY1, RELAY RELAY 1's live line end is connected with the first pin of inside switch K1, switch K1's second pin is connected with the one end of first resistance R1, the other end of first resistance R2 is connected with the one end of second resistance R2, the other end of second resistance R2 is connected with one end of third resistance R3, the other end of third resistance R3 is connected with one end of fourth resistance R4, the other end of fourth resistance R4 is connected with the negative pole of first diode D1 and the first pin of second opto-coupler U2, the second pin of second opto-coupler U2 and the positive pole of first diode D1 are connected with the zero line end of RELAY;
the fourth pin of the second optocoupler U2 is respectively connected with a power supply VCC and one end of a fifth resistor R5, and the other end of the fifth resistor R5 is connected with the collector of the first triode Q1, one end of the first capacitor C1 and a relay signal pin of the first chip U1;
the third pin of the second optocoupler U2 is connected with one end of a seventh resistor R7, one end of a second capacitor C2 and one end of a sixth resistor R6, the other end of the sixth resistor R6 is connected with the base set of the first triode Q1, and the other end of the seventh resistor R7, the other end of the second capacitor C2, the emitter of the first triode Q1 and the other end of the first capacitor C1 are commonly grounded.
Preferably, in the present technical solution, the resistances of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 are the same, and the resistances are all 150kΩ.
Preferably, in the present technical solution, the capacitance value of the first capacitor C1 is 100nF;
the capacitance value of the second capacitor C2 is 10uF.
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, through simple electronic device connection, the switching state of the RELAY can be judged according to the high and low levels output by the RELAY signal pin (RELAY_DET pin) of the first chip U1, and the detection of the state of the RELAY can be accurately completed, so that the effect is ideal.
Drawings
Fig. 1 is a schematic circuit diagram of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, a RELAY state detection circuit for an ammeter includes a RELAY1, wherein a live wire end of the RELAY1 is connected with a first pin of an internal switch K1 of the RELAY, a second pin (l_ UOT pin) of the switch K1 is connected with one end of a first resistor R1, the other end of the first resistor R2 is connected with one end of a second resistor R2, the other end of the second resistor R2 is connected with one end of a third resistor R3, the other end of the third resistor R3 is connected with one end of a fourth resistor R4, the other end of the fourth resistor R4 is connected with a cathode of a first diode D1 and a first pin of a second optocoupler U2, and the second pin of the second optocoupler U2 and an anode of the first diode D1 are connected with a zero line end of the RELAY;
the fourth pin of the second optocoupler U2 is connected with a power supply VCC and one end of a fifth resistor R5, and the other end of the fifth resistor R5 is connected with the collector of the first triode Q1, one end of the first capacitor C1 and a RELAY signal pin (RELAY_DET pin) of the first chip U1;
the third pin of the second optocoupler U2 is connected with one end of a seventh resistor R7, one end of a second capacitor C2 and one end of a sixth resistor R6, the other end of the sixth resistor R6 is connected with the base set of the first triode Q1, and the other end of the seventh resistor R7, the other end of the second capacitor C2, the emitter of the first triode Q1 and the other end of the first capacitor C1 are grounded together.
Preferably, the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 have the same resistance values, and the resistance values are all 150kΩ.
Preferably, the capacitance value of the first capacitor C1 is 100nF; the capacitance value of the second capacitor C2 is 10uF.
Preferably, the first chip U1 is a microprocessor MCU of the electric meter, and its specification and model may be any one of STM32F030RC, HT601x, HT602x, HT501x, HT502x and FM33A0xx, but not limited to the present utility model.
Preferably, the method comprises the steps of,
the circuit principle of the utility model is described as follows:
when the RELAY is normally closed (namely, the connection between the L_OUT and the L end is normal), the first optocoupler U2 is conducted, at the moment, the base electrode of the first triode Q1 is at a high level, the Q1 of the first triode is conducted, the RELAY_DET output of the first chip is at a low level, and the first chip U1 judges that the RELAY is closed; when the RELAY is turned off (i.e., the l_out is turned off from the L terminal), the first optocoupler U2 is turned off, and at this time, the base of the first triode Q1 is at a low level, and the first triode Q1 is turned off and turned off, and the RELAY signal pin (relay_det pin) of the first chip U1 outputs at a high level, and the first chip U1 determines that the RELAY is turned off.
In this process, the first diode D1 is used to protect the first optocoupler U2 from being knocked down by the reverse voltage (the reverse withstand voltage of the optocoupler 1,2 pins is 6V); the second capacitor C2 functions to discharge the sustain voltage when the L terminal is at the negative half cycle.
In summary, the utility model can judge the switch state of the RELAY according to the high and low levels output by the RELAY signal pin (relay_det pin) of the first chip U1 through simple electronic device connection, and accurately complete the detection of the RELAY state, and has ideal effect.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The RELAY state detection circuit for the ammeter is characterized by comprising a RELAY RELAY1, wherein a fire wire end of the RELAY RELAY1 is connected with a first pin of an internal switch K1, a second pin of the switch K1 is connected with one end of a first resistor R1, the other end of the first resistor R2 is connected with one end of a second resistor R2, the other end of the second resistor R2 is connected with one end of a third resistor R3, the other end of the third resistor R3 is connected with one end of a fourth resistor R4, the other end of the fourth resistor R4 is connected with a cathode of a first diode D1 and a first pin of a second optical coupler U2, and the second pin of the second optical coupler U2 and an anode of the first diode D1 are connected with a zero wire end of the RELAY;
the fourth pin of the second optocoupler U2 is respectively connected with a power supply VCC and one end of a fifth resistor R5, and the other end of the fifth resistor R5 is connected with the collector of the first triode Q1, one end of the first capacitor C1 and a relay signal pin of the first chip U1;
the third pin of the second optocoupler U2 is connected with one end of a seventh resistor R7, one end of a second capacitor C2 and one end of a sixth resistor R6, the other end of the sixth resistor R6 is connected with the base set of the first triode Q1, and the other end of the seventh resistor R7, the other end of the second capacitor C2, the emitter of the first triode Q1 and the other end of the first capacitor C1 are commonly grounded.
2. The relay state detection circuit for an electricity meter according to claim 1, wherein the resistances of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 are the same, and the resistances are all 150kΩ.
3. The relay state detection circuit for an electricity meter according to claim 1, wherein a capacitance value of the first capacitor C1 is 100nF;
the capacitance value of the second capacitor C2 is 10uF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321797996.4U CN220709305U (en) | 2023-07-10 | 2023-07-10 | Relay state detection circuit for ammeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321797996.4U CN220709305U (en) | 2023-07-10 | 2023-07-10 | Relay state detection circuit for ammeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220709305U true CN220709305U (en) | 2024-04-02 |
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ID=90436286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321797996.4U Active CN220709305U (en) | 2023-07-10 | 2023-07-10 | Relay state detection circuit for ammeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220709305U (en) |
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2023
- 2023-07-10 CN CN202321797996.4U patent/CN220709305U/en active Active
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