CN216794699U - AC/DC power supply circuit of ultrasonic detection equipment - Google Patents
AC/DC power supply circuit of ultrasonic detection equipment Download PDFInfo
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- CN216794699U CN216794699U CN202122956266.1U CN202122956266U CN216794699U CN 216794699 U CN216794699 U CN 216794699U CN 202122956266 U CN202122956266 U CN 202122956266U CN 216794699 U CN216794699 U CN 216794699U
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Abstract
The utility model discloses an alternating current-direct current power supply circuit of ultrasonic detection equipment, which comprises a three-gear six-pin switch, a first alternating current-direct current conversion circuit, a second alternating current-direct current conversion circuit, a first relay, a second relay, a charging module, a rechargeable battery and a load circuit. The beneficial effects are that: when the power supply is supplied to a load, the three-gear six-pin switch is kept in a 1-gear state, and when the power supply is supplied by the alternating current power supply, the first relay is automatically attracted and supplies power to the load circuit by using the alternating current power supply; when the alternating current power supply stops supplying power, the first relay does not attract and a rechargeable battery is used for supplying power to the load circuit through the second relay and the first relay; when the rechargeable battery needs to be charged; when the rechargeable battery is charged, the three-gear six-pin switch is kept in a 2-gear state, and the second relay is attracted and supplies power to the rechargeable battery by using the charging module; the self-adaptive switching between the power supply of the alternating current power supply and the power supply of the rechargeable battery can be realized, and the emergency power supply operation is simplified.
Description
Technical Field
The utility model relates to the technical field of electronic circuits, in particular to an alternating current-direct current power supply circuit of ultrasonic detection equipment.
Background
The mobile locomotive axle ultrasonic detection equipment is specially used for ultrasonic detection of an in-service locomotive axle, and a battery is usually adopted as a power supply. The mobile detection equipment is generally charged before being used, so that the battery capacity can meet the detection requirement of the whole locomotive, but the situation that the power is off due to work errors, non-pre-charging or battery aging and damage is not eliminated. The mobile detection equipment is automatic equipment, and if power is cut off in the detection process, the equipment is difficult to reset manually under the condition of not damaging the equipment, so that an external power supply is usually accessed for emergency use. The existing mobile detection equipment mostly uses a switch to switch emergency power supply, and because the emergency power supply condition has low occurrence probability, an operator cannot easily master the access operation of an emergency power supply.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the problems in the prior art and provides an alternating current-direct current power supply circuit of ultrasonic detection equipment.
In order to achieve the technical purpose and achieve the technical effect, the utility model is realized by the following technical scheme:
an alternating current-direct current power supply circuit of ultrasonic detection equipment comprises a three-gear six-pin switch, a first alternating current-direct current conversion circuit, a second alternating current-direct current conversion circuit, a first relay, a second relay, a charging module, a rechargeable battery and a load circuit, wherein a No. 2 pin and a No. 5 pin of the three-gear six-pin switch are connected with a 220V alternating current power supply;
the No. 1 pin and the No. 4 pin of the three-gear six-pin switch are connected with an alternating current input end of a first alternating current-direct current conversion circuit, a positive electrode output end of the first alternating current-direct current conversion circuit is connected with the No. 1 pin and the No. 6 pin of a first relay, a negative electrode output end of the first alternating current-direct current conversion circuit is connected with the No. 8 pin of the first relay and a negative electrode input end of a load circuit, and the No. 2 pin and the No. 5 pin of the first relay are connected with a positive electrode input end of the load circuit;
the No. 3 pin and the No. 6 pin of the third-gear hexagonal switch are connected with the alternating current input end of a second alternating current-direct current conversion circuit, the positive electrode output end of the second alternating current-direct current conversion circuit is connected with the No. 1 pin of a second relay, and the negative electrode output end of the second alternating current-direct current conversion circuit is connected with the No. 8 pin of the second relay;
the No. 3 pin of the three-gear hexagonal switch is connected with a first alternating current input end of a charging module, the No. 6 pin of the three-gear hexagonal switch is connected with a second alternating current input end of the charging module, the positive output end of the charging module is connected with the No. 6 pin of a second relay, and the negative output end of the charging module is connected with the negative electrode of a rechargeable battery;
the positive pole of rechargeable battery is connected with No. 3 pin, No. 5 pin of second relay, rechargeable battery's negative pole is connected with load circuit's negative pole input, No. 2 pin of second relay is connected with No. 3 pin of first relay.
Wherein, the first AC/DC conversion circuit comprises a first fuse, a first transformer, a first rectifier bridge, a first voltage-stabilizing block, a second voltage-stabilizing block, a third voltage-stabilizing block, a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor,
the first end of a primary coil of the first transformer is connected with a pin 1 of a third-gear six-pin switch, the second end of the primary coil of the first transformer is connected with the first end of a first fuse, a pin 4 of the third-gear six-pin switch is connected with the second end of the first fuse, the first end of a secondary coil of the first transformer is connected with a first alternating current input end of a first rectifier bridge, and the second end of a secondary coil of the first transformer is connected with a second alternating current input end of the first rectifier bridge;
the direct current positive output end of the first rectifier bridge is connected with the positive electrode of the first capacitor, the positive electrode of the second capacitor, the pin No. 3 of the first voltage stabilizing block, the pin No. 3 of the second voltage stabilizing block and the pin No. 3 of the third voltage stabilizing block in a sharing mode, the first end of the first resistor is connected with the pin No. 2 of the first voltage stabilizing block, the pin No. 2 of the second voltage stabilizing block and the pin No. 2 of the third voltage stabilizing block in a sharing mode, and the second end of the first resistor is connected with the first end of the second resistor, the pin No. 1 of the first voltage stabilizing block, the pin No. 1 of the second voltage stabilizing block and the pin No. 1 of the third voltage stabilizing block in a sharing mode;
and the direct-current negative output end of the first rectifier bridge is connected with the negative electrode of the first capacitor, the negative electrode of the second capacitor, the second end of the second resistor, the negative electrode of the third capacitor, the negative electrode of the fourth capacitor, the No. 8 pin of the first relay and the negative input end of the load circuit in a common mode.
Wherein the second alternating current conversion circuit comprises a second transformer, a third rectifier bridge, a fifth capacitor, a sixth capacitor, a fourth resistor and a second indicator light,
a first end of a primary coil of the second transformer is connected with a pin 3 of the third-gear six-pin switch, a second end of the primary coil of the second transformer is connected with a pin 6 of the third-gear six-pin switch, a first end of a secondary coil of the second transformer is connected with a first alternating current input end of a third rectifier bridge, and a second end of a secondary coil of the second transformer is connected with a second alternating current input end of the third rectifier bridge;
the direct-current positive output end of the third rectifier bridge is connected with the positive electrode of the fifth capacitor, the positive electrode of the sixth capacitor, the first end of the fourth resistor and the No. 1 pin of the second relay in common, and the second end of the fourth resistor is connected with the positive electrode of the second indicator light;
and the direct-current negative output end of the third rectifier bridge is connected with the negative electrode of the fifth capacitor, the negative electrode of the sixth capacitor, the negative electrode of the second indicator light and the No. 8 pin of the second relay in common.
Furthermore, the charging system further comprises a second fuse, a first end of the second fuse is connected with the first alternating current input end of the charging module and a first end of a primary coil of the second transformer in a common mode, and a second end of the second fuse is connected with a No. 3 pin of the three-gear six-pin switch.
The load circuit comprises a second-gear four-foot switch, a third resistor, a first indicator light and a load, wherein a pin 1 of the second-gear four-foot switch is an anode input end of the load circuit, a pin 3 of the second-gear four-foot switch is a cathode input end of the load circuit, a pin 2 of the second-gear four-foot switch is connected with a first end of the third resistor and a positive electrode of the load, a second end of the third resistor is connected with a positive electrode of the first indicator light, and a pin 4 of the second-gear four-foot switch is connected with a negative electrode of the first indicator light and a negative electrode of the load.
The No. 1 pin and the No. 8 pin of the first relay are connected with a second diode in parallel, and the No. 1 pin and the No. 8 pin of the second relay are connected with a fourth diode in parallel.
The utility model has the beneficial effects that: the charging system is characterized in that a three-gear six-pin switch, a first alternating current-direct current conversion circuit, a second alternating current-direct current conversion circuit, a first relay, a second relay, a charging module, a rechargeable battery and a load circuit are arranged; when the power supply is supplied to a load, the three-gear six-pin switch is kept in a 1-gear state, and when the power supply is supplied by the alternating current power supply, the first relay is automatically attracted and supplies power to the load circuit by using the alternating current power supply; when the alternating current power supply stops supplying power, the first relay does not attract and a rechargeable battery is used for supplying power to the load circuit through the second relay and the first relay; when the rechargeable battery needs to be charged; when the rechargeable battery is charged, the three-gear six-pin switch is kept in a 2-gear state, and the second relay is attracted and supplies power to the rechargeable battery by using the charging module; the self-adaptive switching between the power supply of the alternating current power supply and the power supply of the rechargeable battery can be realized, and the emergency power supply operation is simplified.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:
FIG. 1 is a circuit diagram of an AC/DC power supply circuit according to the present invention;
the reference numbers in the figures illustrate: s1-third-gear six-pin switch, S2-second-gear four-pin switch, K1-first relay, K2-second relay, BT 1-rechargeable battery, F1-first fuse, F2-second fuse, T1-first transformer, T2-second transformer, D1-first rectifier bridge, D2-second diode, D3-third rectifier bridge, D4-fourth diode, LED 1-first indicator lamp, LED 2-second indicator lamp, U1-first voltage-stabilizing block, U2-second voltage-stabilizing block, U3-third voltage-stabilizing block, C1-first capacitor, C2-second capacitor, C3-third capacitor, C4-fourth capacitor, C5-fifth capacitor, C6-sixth capacitor, R1-first resistor, R2-second resistor, R3-third resistor, R3-third capacitor, C4-fourth capacitor, C5-fifth capacitor, C6-sixth capacitor, R1-first resistor, R2-second resistor, R3-third resistor, R4-fourth resistor, RL-load.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in combination with embodiments.
As shown in fig. 1, an ac/dc power supply circuit of an ultrasonic detection device includes a three-stage six-pin switch S1, a first ac/dc conversion circuit, a second ac/dc conversion circuit, a first relay K1, a second relay K2, a charging module, a rechargeable battery BT1 and a load circuit, where pin 2 and pin 5 of the three-stage six-pin switch S1 are connected to a 220V ac power supply; the No. 1 pin and the No. 4 pin of the third-gear six-pin switch S1 are connected with an alternating current input end of a first alternating current-direct current conversion circuit, the positive electrode output end of the first alternating current-direct current conversion circuit is connected with the No. 1 pin and the No. 6 pin of a first relay K1, the negative electrode output end of the first alternating current-direct current conversion circuit is connected with the No. 8 pin of a first relay K1 and the negative electrode input end of a load circuit, and the No. 2 pin and the No. 5 pin of the first relay K1 are connected with the positive electrode input end of the load circuit; the No. 3 pin and the No. 6 pin of the third-gear hexagonal switch S1 are connected with the alternating current input end of the second alternating current-direct current conversion circuit, the positive electrode output end of the second alternating current-direct current conversion circuit is connected with the No. 1 pin of the second relay K2, and the negative electrode output end of the second alternating current-direct current conversion circuit is connected with the No. 8 pin of the second relay K2; the No. 3 pin of the third-gear hexagonal switch is connected with a first alternating current input end of the charging module, the No. 6 pin of the third-gear hexagonal switch is connected with a second alternating current input end of the charging module, the positive output end of the charging module is connected with the No. 6 pin of the second relay, and the negative output end of the charging module is connected with the negative electrode of the rechargeable battery; the positive pole of rechargeable battery BT1 is connected with pin No. 3 and pin No. 5 of second relay K2, and the negative pole of rechargeable battery BT1 is connected with the negative pole input of load circuit, and pin No. 2 of second relay K2 is connected with pin No. 3 of first relay K1.
Pin 1 and pin 8 of the first relay K1 are connected in parallel with a second diode D2, and pin 1 and pin 8 of the second relay K2 are connected in parallel with a fourth diode D4.
The first alternating current-direct current conversion circuit comprises a first fuse F1, a first transformer T1, a first rectifier bridge D1, a first voltage stabilizing block U1, a second voltage stabilizing block U2, a third voltage stabilizing block U3, a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a fourth capacitor C4, wherein a first end of a primary coil of the first transformer T1 is connected with a pin 1 of a third-gear sixth-leg switch S1, a second end of a primary coil of the first transformer T1 is connected with a first end of the first fuse F1, a pin 4 of the third-gear sixth-leg switch S1 is connected with a second end of the first fuse F1, a first end of a secondary coil of the first transformer T1 is connected with a first alternating current input end of the first rectifier bridge D1, and a second end of a secondary coil of the first transformer T1 is connected with a second alternating current input end of the first rectifier bridge D1; the direct current positive electrode output end of the first rectifier bridge D1 is connected with the positive electrode of the first capacitor C1, the positive electrode of the second capacitor C2, the pin No. 3 of the first voltage stabilizing block U1, the pin No. 3 of the second voltage stabilizing block U2 and the pin No. 3 of the third voltage stabilizing block U3 in a sharing mode, the first end of the first resistor R1 is connected with the pin No. 2 of the first voltage stabilizing block U1, the pin No. 2 of the second voltage stabilizing block U2 and the pin No. 2 of the third voltage stabilizing block U3 in a sharing mode, the second end of the first resistor R1 is connected with the first end of the second resistor R2, the pin No. 1 of the first voltage stabilizing block U1, the pin No. 1 of the second voltage stabilizing block U2 and the pin No. 1 of the third voltage stabilizing block U3 in a sharing mode; the direct current negative pole output end of the first rectifier bridge D1 is connected with the negative pole of the first capacitor C1, the negative pole of the second capacitor C2, the second end of the second resistor R2, the negative pole of the third capacitor C3, the negative pole of the fourth capacitor C4, the No. 8 pin of the first relay and the negative pole input end of the load circuit in common.
The second alternating current conversion circuit comprises a second transformer T2, a third rectifier bridge D3, a fifth capacitor C5, a sixth capacitor C6, a fourth resistor R4, a second indicator light LED2 and a second fuse F2, wherein a first end of a primary coil of the second transformer T2 is connected with a pin 3 of a third-gear sixth-leg switch S1, a first end of the second fuse F2 is commonly connected with a first alternating current input end of the charging module and a first end of a primary coil of the second transformer T2, a second end of the second fuse F2 is connected with a pin 3 of a third-gear sixth-leg switch S1, a second end of a primary coil of the second transformer T2 is connected with a pin 6 of a third-gear sixth-leg switch S1, a first end of a secondary coil of the second transformer T2 is connected with a first alternating current input end of the third rectifier bridge D3, and a second end of a secondary coil of the second transformer T2 is connected with a second alternating current input end of the third rectifier bridge D3; the direct-current positive electrode output end of the third rectifier bridge D3 is connected with the positive electrode of the fifth capacitor C5, the positive electrode of the sixth capacitor C6, the first end of the fourth resistor R4 and the No. 1 pin of the second relay K2 in common, and the second end of the fourth resistor R4 is connected with the positive electrode of the second indicator light LED 2; the direct current negative electrode output end of the third rectifier bridge D3 is connected with the negative electrode of the fifth capacitor C5, the negative electrode of the sixth capacitor C6, the negative electrode of the second indicator light LED2 and the No. 8 pin of the second relay K2 in common.
The load circuit comprises a second-gear four-pin switch S2, a third resistor R3, a first indicator light LED1 and a load RL, wherein a pin 1 of the second-gear four-pin switch S2 is a positive electrode input end of the load circuit, a pin 3 of the second-gear four-pin switch S2 is a negative electrode input end of the load circuit, a pin 2 of the second-gear four-pin switch S2 is connected with a first end of the third resistor R3 and a positive electrode of the load in a common mode, a second end of the third resistor R3 is connected with a positive electrode of the first indicator light LED1, and a pin 4 of the second-gear four-pin switch S2 is connected with a negative electrode of the first indicator light LED2 and a negative electrode of the load RL in a common mode.
The working principle is as follows:
one, 220V AC power supply mode
The alternating current of 220V is connected, the third-gear six-pin switch K1 is placed in a 1-gear position (namely, a pin 2 of the third-gear six-pin switch is communicated with a pin 1, a pin 5 of the third-gear six-pin switch is communicated with a pin 4), the second-gear four-pin switch is closed, a DC power supply is generated through a first transformer T1 and a first rectifier bridge D1, then the DC power supply is output to a DC24V power supply with the maximum current reaching 22.5A through three TL1803 voltage stabilizing blocks (a first voltage stabilizing block U1, a second voltage stabilizing block U2 and a third voltage stabilizing block U3) which are connected in parallel, and meanwhile, the first relay K1 is attracted (namely, a pin 6 of the first relay is communicated with a pin 5, a pin 3 of the first relay is disconnected with a pin 2), and the generated DC power supply is output to a load RL through a second-gear four-pin switch S2.
Second, charging battery power supply mode
The 220V alternating current is not connected, the third-gear six-pin switch K1 is placed in the 1-gear position (namely, the pin 2 of the third-gear six-pin switch is communicated with the pin 1, the pin 5 of the third-gear six-pin switch is communicated with the pin 4), the second-gear four-pin switch is closed, the first relay K1 is not attracted (namely, the pin 6 of the first relay is disconnected with the pin 5, and the pin 3 of the first relay is communicated with the pin 2), the second relay K2 is not attracted (namely, the pin 6 of the second relay is disconnected with the pin 5, and the pin 3 of the second relay is communicated with the pin 2), and the power supply of the rechargeable battery BT1 is supplied to the load RL through the second relay K2, the first relay K1 and the second-gear four-pin switch S2.
Charging mode of rechargeable battery
The 220V alternating current is connected, the third-gear six-pin switch K1 is placed in a 2-gear position (namely, a pin 2 of the third-gear six-pin switch is communicated with a pin 3, a pin 5 of the third-gear six-pin switch is communicated with a pin 6), the second-gear four-pin switch is closed, the 220V alternating current passes through the second transformer T2 and the third rectifier bridge D3 to generate a low-voltage direct current power supply, the second relay K2 is enabled to attract (namely, the pin 6 of the second relay is communicated with the pin 5, and the pin 3 of the second relay is disconnected with the pin 2), the charging module operates simultaneously, the charging module charges the rechargeable battery 1, and the second relay K2 attracts and disconnects the power supply of the load RL.
The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed.
Claims (6)
1. The utility model provides an alternating current-direct current supply circuit of ultrasonic testing equipment which characterized in that: the alternating current and direct current power supply circuit comprises a three-gear six-pin switch, a first alternating current and direct current conversion circuit, a second alternating current and direct current conversion circuit, a first relay, a second relay, a charging module, a rechargeable battery and a load circuit, wherein a No. 2 pin and a No. 5 pin of the three-gear six-pin switch are connected with a 220V alternating current power supply;
the No. 1 pin and the No. 4 pin of the three-gear six-pin switch are connected with an alternating current input end of a first alternating current-direct current conversion circuit, a positive electrode output end of the first alternating current-direct current conversion circuit is connected with the No. 1 pin and the No. 6 pin of a first relay, a negative electrode output end of the first alternating current-direct current conversion circuit is connected with the No. 8 pin of the first relay and a negative electrode input end of a load circuit, and the No. 2 pin and the No. 5 pin of the first relay are connected with a positive electrode input end of the load circuit;
the No. 3 pin and the No. 6 pin of the three-gear six-pin switch are connected with the alternating current input end of a second alternating current-direct current conversion circuit, the positive electrode output end of the second alternating current-direct current conversion circuit is connected with the No. 1 pin of a second relay, and the negative electrode output end of the second alternating current-direct current conversion circuit is connected with the No. 8 pin of the second relay;
the No. 3 pin of the three-gear six-pin switch is connected with a first alternating current input end of a charging module, the No. 6 pin of the three-gear six-pin switch is connected with a second alternating current input end of the charging module, the positive output end of the charging module is connected with the No. 6 pin of a second relay, and the negative output end of the charging module is connected with the negative electrode of a rechargeable battery;
the positive pole of rechargeable battery is connected with No. 3 pin, No. 5 pin of second relay, rechargeable battery's negative pole is connected with load circuit's negative pole input, No. 2 pin of second relay is connected with No. 3 pin of first relay.
2. The ac-dc power supply circuit of claim 1, wherein: the first AC/DC conversion circuit comprises a first fuse, a first transformer, a first rectifier bridge, a first voltage-stabilizing block, a second voltage-stabilizing block, a third voltage-stabilizing block, a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor,
the first end of a primary coil of the first transformer is connected with a pin 1 of a third-gear six-pin switch, the second end of the primary coil of the first transformer is connected with the first end of a first fuse, a pin 4 of the third-gear six-pin switch is connected with the second end of the first fuse, the first end of a secondary coil of the first transformer is connected with a first alternating current input end of a first rectifier bridge, and the second end of the secondary coil of the first transformer is connected with a second alternating current input end of the first rectifier bridge;
the direct current positive output end of the first rectifier bridge is connected with the positive electrode of the first capacitor, the positive electrode of the second capacitor, the pin No. 3 of the first voltage stabilizing block, the pin No. 3 of the second voltage stabilizing block and the pin No. 3 of the third voltage stabilizing block in a sharing mode, the first end of the first resistor is connected with the pin No. 2 of the first voltage stabilizing block, the pin No. 2 of the second voltage stabilizing block and the pin No. 2 of the third voltage stabilizing block in a sharing mode, and the second end of the first resistor is connected with the first end of the second resistor, the pin No. 1 of the first voltage stabilizing block, the pin No. 1 of the second voltage stabilizing block and the pin No. 1 of the third voltage stabilizing block in a sharing mode;
and the direct-current negative output end of the first rectifier bridge is connected with the negative electrode of the first capacitor, the negative electrode of the second capacitor, the second end of the second resistor, the negative electrode of the third capacitor, the negative electrode of the fourth capacitor, the No. 8 pin of the first relay and the negative input end of the load circuit in a common mode.
3. The ac-dc power supply circuit of claim 1, wherein: the second alternating current-direct current conversion circuit comprises a second transformer, a third rectifier bridge, a fifth capacitor, a sixth capacitor, a fourth resistor and a second indicator lamp,
a first end of a primary coil of the second transformer is connected with a pin 3 of the third-gear six-pin switch, a second end of the primary coil of the second transformer is connected with a pin 6 of the third-gear six-pin switch, a first end of a secondary coil of the second transformer is connected with a first alternating current input end of a third rectifier bridge, and a second end of a secondary coil of the second transformer is connected with a second alternating current input end of the third rectifier bridge;
the direct-current positive output end of the third rectifier bridge is connected with the positive electrode of the fifth capacitor, the positive electrode of the sixth capacitor, the first end of the fourth resistor and the No. 1 pin of the second relay in common, and the second end of the fourth resistor is connected with the positive electrode of the second indicator light;
and the direct-current negative output end of the third rectifier bridge is connected with the negative electrode of the fifth capacitor, the negative electrode of the sixth capacitor, the negative electrode of the second indicator light and the No. 8 pin of the second relay in common.
4. The AC-DC power supply circuit of claim 3, wherein: the first end of the second fuse is connected with the first alternating current input end of the charging module and the first end of the primary coil of the second transformer in a common mode, and the second end of the second fuse is connected with the No. 3 pin of the third-gear six-pin switch.
5. The ac-dc power supply circuit of claim 1, wherein: the load circuit comprises a second-gear four-foot switch, a third resistor, a first indicator light and a load, wherein a pin 1 of the second-gear four-foot switch is an anode input end of the load circuit, a pin 3 of the second-gear four-foot switch is a cathode input end of the load circuit, a pin 2 of the second-gear four-foot switch is connected with a first end of the third resistor and a positive electrode of the load, a second end of the third resistor is connected with a positive electrode of the first indicator light, and a pin 4 of the second-gear four-foot switch is connected with a negative electrode of the first indicator light and a negative electrode of the load.
6. The ac-dc power supply circuit of claim 1, wherein: no. 1 pin and No. 8 pin of the first relay are connected with a second diode in parallel, and No. 1 pin and No. 8 pin of the second relay are connected with a fourth diode in parallel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122956266.1U CN216794699U (en) | 2021-11-29 | 2021-11-29 | AC/DC power supply circuit of ultrasonic detection equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122956266.1U CN216794699U (en) | 2021-11-29 | 2021-11-29 | AC/DC power supply circuit of ultrasonic detection equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114123471A (en) * | 2021-11-29 | 2022-03-01 | 常州超声电子有限公司 | AC/DC power supply circuit of ultrasonic detection equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114123471A (en) * | 2021-11-29 | 2022-03-01 | 常州超声电子有限公司 | AC/DC power supply circuit of ultrasonic detection equipment |
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