CN114325085A - Electric energy meter and method supporting dynamic energy consumption management - Google Patents
Electric energy meter and method supporting dynamic energy consumption management Download PDFInfo
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Abstract
An electric energy meter and a method supporting dynamic energy consumption management are provided, wherein the electric energy meter comprises an electric energy meter MCU, and a remote communication module and a relay driving module which are connected with the electric energy meter MCU, and the remote communication module and the relay driving module work in a peak-off mode; the remote communication module adopts a PLC module and a peripheral circuit, is fixed in the electric energy meter and is used for remote communication between the electric energy meter and the concentrator; the relay driving module comprises a 3.3V power supply and a 12V relay, and the 12V relay is driven to work by the 3.3V power supply. The invention ensures that the relay does not have remote communication before controlling the relay, does not have relay action during the remote communication, reduces the cost of the electric energy meter, improves the reliability of the electric energy meter, and has good application prospect.
Description
Technical Field
The invention belongs to the field of energy consumption management of electric energy meters, and particularly relates to an electric energy meter which has both a relay switching-on and switching-off function and a PLC remote communication module.
Background
With the rapid development of global economy, an electric energy meter is generally provided with a remote communication module and an internal relay. The internal relay is generally 12V3W, three relays are needed for the three-phase table, the instantaneous current 3 x 3W/12V of the relay is controlled to be 0.75A, and the control time is 120 ms. When the PLC module is used as a remote communication module, when the PLC module sends data to a power line, the maximum current reaches 800mA, the two modules need to work at the same time and 1.55A, and in addition, the MCU and the peripheral power consumption are 250mA, and the maximum instantaneous current is 1.8A.
The power supply of the existing electric energy meter cannot support the large current, so that the abnormal conditions of pulling down the power supply and resetting the electric energy meter are easily caused.
Disclosure of Invention
The invention aims to provide an electric energy meter and a method for supporting dynamic energy consumption management, aiming at the problems that the power supply of the existing electric energy meter cannot support the large current generated by the simultaneous work of a PLC and a relay, the power supply is pulled down easily, and the electric energy meter is reset abnormally; the relay is controlled to ensure that no remote communication exists, the relay does not act during the remote communication, the cost of the electric energy meter is reduced, the reliability of the electric energy meter is improved, and the relay control method has a good application prospect.
The technical scheme of the invention is as follows:
the invention provides an electric energy meter supporting dynamic energy consumption management, which comprises an electric energy meter MCU, a remote communication module and a relay driving module, wherein the remote communication module and the relay driving module are connected with the electric energy meter MCU;
the remote communication module adopts a PLC module and a peripheral circuit, is fixed in the electric energy meter and is used for remote communication between the electric energy meter and the concentrator;
the relay driving module comprises a 3.3V power supply and a 12V relay, and the 12V relay is driven to work by the 3.3V power supply.
Further, the remote communication module includes: a thermistor RT4, a diode D10, resistors R1, R95, R69 and R38, capacitors C40, C42, C44, C1, C2 and C3, inductors L1, L2 and L3, transformers T1, T2 and T3 and a PLC module; one end of the resistor R1 is connected with a 3.3V power supply, the other end of the resistor R1 is connected with a state flag end (a 7-pin) of the PLC module, the state flag end is connected with a corresponding end of the electric energy meter MCU, one end of the thermistor RT4 is connected with a 12V power supply, the other end of the thermistor RT4 is connected with the anode of the diode D10, and the cathode of the diode D10 is connected with a power supply end (an 8-pin) of the PLC module;
the PLC module is communicated with the MCU through a UART serial port, 9 pins of the PLC module are used as a UART receiving end to receive data from the MCU of the electric energy meter and are marked as MCU _ RX _ G3, the UART receiving end of the PLC module is connected with one end of a capacitor C44, and the other end of the capacitor C44 is grounded;
the power supply monitoring system comprises a PLC module, a resistor R95, a capacitor C42, a capacitor C42, a 3.3V power supply, a power supply controller and a power supply controller, wherein a 10 pin of the PLC module is used as a UART sending end to send data to an electric energy meter MCU and is recorded as MCU _ TX _ G3, the UART sending end of the PLC module is simultaneously connected with one end of the resistor R95 and one end of the capacitor C42, the other end of the capacitor C42 is grounded, and the other end of the resistor R95 is connected with the 3.3V power supply;
the 11 pins of the PLC module are used as UART enabling ends to be connected with an IO port of an electric energy meter MCU and are marked as MCU _ EN _ G3, the UART enabling ends of the PLC module are simultaneously connected with one ends of a capacitor C40, a resistor R38 and a resistor R69, the other ends of the capacitor C40 and the resistor R38 are connected, and the other end of the resistor R69 is connected with a 3.3V power supply;
the grounding end of the PLC module is grounded through a pin 12;
when the UART enabling end MCU _ EN _ G3 is low, the PLC module enters a sleep state and does not consume energy, and when the UART enabling end MCU _ EN _ G3 is high, the PLC module enters a working state;
the ABC three-phase electric signals of the mains supply are respectively connected with a capacitor C1 inductor L1, a capacitor C2 inductor L2 and a capacitor C3 inductor L3 in series, then are respectively connected with one input end of a transformer T1, a transformer T2 and a transformer T3, the other input end of each of the transformers T1, the other input end of each of the transformers T2 and the other input end of each of the transformers T3 are respectively connected with the zero line of the mains supply, and two output ends of each of the transformers T1, the T2 and the T3 are respectively connected with the corresponding carrier signal input end of the PLC module.
Further, the relay driving module includes: the thermistor RT6, the resistors R218, R48, R44, R224, R186, R187, R188, R189, R190, R191, R193, R194, R195, R196, R197, R198, R192, the triode Q3, Q6, Q12, Q13, Q10, Q11, Q14 and the bidirectional regulator tube D15;
one end of the thermistor RT6 is connected with a 12V power supply, the other end of the thermistor RT6 is respectively connected with one ends of resistors R218 and R224, the other end of the resistor R218 is connected with a resistor R48 in series, the other end of the resistor R224 is connected with a resistor R44 in series, the resistors R48 and R44 are connected, the connection points of the resistors R186 and R187 are respectively connected with one ends of resistors R186 and R187, and E poles of triodes Q3 and Q6, the other end of the resistor R186 is connected with one end of a resistor R188 and C pole of the triode Q10, the other end of the resistor R188 is connected with B pole of the triode Q3, C pole of the triode Q3 is simultaneously connected with one end of a bidirectional voltage regulator D15 and C pole of the triode Q13, the point is marked as RELAY _ B, and the marked point RELAY _ B is connected with one end of a RELAY coil; the other end of the bidirectional voltage-stabilizing tube D15 is connected with the C poles of triodes Q6 and Q12, the point is marked as RELAY _ A, the marked point RELAY _ A is connected with the other end of a RELAY coil, the B pole of the triode Q6 is connected with the C pole of a resistor R187 and the C pole of the triode Q11 after being connected with an R189 in series respectively, the B pole of the triode Q11 is connected with the C poles of resistors R191 and R198 and a triode Q14 simultaneously, the other end of the resistor R191 is connected with a resistor R192, the connecting point is connected with an IO pin of an electric energy meter MCU, the marked point is RLY _ ON, the other end of the resistor R192 is connected with the E pole of the triode Q14 in ground, the B pole of the triode Q14 is connected with a resistor R196 in series and then connected with the B poles of the resistors R190 and R194 and the triode Q10 simultaneously, the other end of the resistor R190 is connected with the resistor R193, the marked point is RLY _ OFF, and the marked point is also connected to the corresponding IO port of the electric energy meter MCU, the other end of the resistor R193 is grounded, the E pole of the triode Q10 is connected with the B poles of the resistor R195 and the triode Q12, the other ends of the resistors R194, R195 and R198 and the E poles of the triodes Q12 and Q13 are grounded, the E pole of the triode Q11 is connected with the B pole of the triode Q13, and the connection point is grounded after being connected with the resistor 197 in series.
An energy consumption management method of an electric energy meter supporting dynamic energy consumption management is applied to the electric energy meter, and the method enables a relay and a remote communication module to work in a peak staggering mode, and specifically comprises the following steps:
the first step is as follows: detecting the state of a 7 th pin which is a state flag end of the PLC module by the electric energy meter MCU during interruption, and allowing the relay to act when the PLC module is continuously detected to be low level for n times;
the second step is that: when the PLC module needs to send data to the concentrator, the state flag end of the PLC module, namely the 7 th pin, is set to be high level, and then the data is sent to the concentrator after the time T1 is delayed; when the transmission is finished, the level of the PLC module state flag end is pulled down;
the third step: when the relay driving module needs to operate the relay, whether the relay is allowed to be operated is judged according to the result of the first step, if the relay is allowed to be operated, the relay is operated, the relay operation time is T2, and T2 is less than T1; otherwise, returning to the first step.
Further, in the first step, when the detection is low for 5 consecutive times, the relay is allowed to operate.
Further, in the second step, the delay time T1 is 125 ms; the operating relay time T2 is 120 ms.
Further, in the first step, the interruption time is 1 ms.
The invention has the beneficial effects that:
when the dynamic energy consumption management system is used, the maximum power consumption is that 250mA +800mA is equal to 1.05A, the instantaneous maximum power consumption of the system is reduced by about 42%, the cost of the electric energy meter is reduced, and the reliability of the electric energy meter is improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 is a functional block diagram of a telecommunications module of the present invention.
Fig. 2 is a circuit diagram of a relay drive module of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein.
The invention provides an electric energy meter and a method supporting dynamic energy consumption management, wherein the electric energy meter comprises an electric energy meter MCU, a remote communication module and a relay driving module, and the two modules work in a peak staggering way by using a dynamic energy consumption management mode, so that the instantaneous maximum power consumption of a system is reduced, and the stable operation of the whole system of the electric energy meter is ensured. The remote communication module is a PLC module fixed in the electric energy meter and used for the electric energy meter to carry out remote communication with the concentrator; the relay driving module is a circuit for driving a 12V relay to work by a 3.3V power supply.
Wherein, the remote communication module comprises: a thermistor RT4, a diode D10, resistors R1, R95, R69 and R38, capacitors C40, C42, C44, C1, C2 and C3, inductors L1, L2 and L3, and transformers T1, T2 and T3; one end of the resistor R1 is connected to a 3.3V power supply, the other end of the resistor R1 is connected to a pin 7 of the PLC module, one end of the thermistor RT4 is connected with a 12V power supply, the 12V power supply is marked as DC _12V, the other end of the resistor R1 is connected to the anode of the diode D10, the cathode of the diode D10 is connected to a pin 8 of the PLC module, the PLC module is communicated with the MCU through UART, 9 pins of the PLC module are modules for receiving data from the MCU of the electric energy meter, 10 pins of the PLC module are modules for receiving data to the MCU of the electric energy meter, 9 pins of the PLC module are simultaneously connected with the capacitor C44, the transmitting pin of the MCU is connected with the pin marked as MCU _ UART _ G3, 10 pins of the PLC module are simultaneously connected with the resistor R95, the capacitor C42 and the receiving pin of the MCU and are marked as MCU _ RX _ G3, and 11 pins of the PLC module are simultaneously connected with the capacitor C40, The resistor R38, the resistor R69 and the IO port of the MCU are connected and marked as MCU _ EN _ G3;
when the MCU _ EN _ G3 is low, the PLC module enters a sleep state and does not consume energy, and when the MCU _ EN _ G3 is high, the PLC module enters a working state;
the 12 th pin of the PLC module is connected to the other end of the capacitor C40, the other end of the capacitor C42, the other end of the capacitor C44, the other end of the resistor R38, and ground, the other end of the resistor R95 is connected to the 3.3V power supply together with the other end of the resistor R69, the 2 nd pin of the transformer T1 is connected to the 1 st pin of the PLC module, the 3 rd pin of the transformer T1 is connected to the 2 nd pin of the PLC module, the 4 th pin of the transformer T1 is connected to one end of the inductor L1, the other end of the inductor L1 is connected to the commercial power of the a phase, the 1 st pin of the transformer T1 is connected to the zero line of the commercial power, the 2 nd pin of the transformer T2 is connected to the 3 rd pin of the PLC module, the 3 rd pin of the transformer T2 is connected to the 4 th pin of the PLC module, the 4 th pin of the transformer T2 is connected to one end of the inductor L2, the other end of inductance L2 is connected to the commercial power of B looks, transformer T2's 1 st foot is connected to on the zero line of commercial power, transformer T3's 2 nd foot is connected to the 5 th foot of PLC module, transformer T3's 3 rd foot is connected to the 6 th foot of PLC module, transformer T3's 4 th foot is connected to inductance L3's one end, inductance L3's the other end is connected to the commercial power of C looks, transformer T3's 1 st foot is connected to on the zero line of commercial power.
The relay driving module comprises: thermistor RT6, resistors R218, R48, R44, R224, R186, R187, R188, R189, R190, R191, R193, R194, R195, R196, R197, R198, R192, triodes Q3, Q6, Q12, Q13, Q10, Q11, Q14 and a bidirectional voltage regulator tube D15. One end of the thermistor RT6 is connected with the DC _12V, the other end of the thermistor RT6 is connected with the R218 and the R224, the resistor R218 is connected with the resistor R48, the other end of the resistor R48 is respectively connected with the resistor R189, the resistor R44, the resistor R187, the E pole of the triode Q3 and the E pole of the triode Q6, the other end of the resistor R44 is connected with the other end of the resistor R224, the other end of the resistor R186 is connected with the resistor R188 and the C pole of the triode Q10, the other end of the resistor R188 is connected with the B pole of the triode Q3, the C pole of the triode Q3 is simultaneously connected with the C pole of the bidirectional voltage regulator D15 and the C pole of the triode Q13 and marks the point as RELAY _ B, the marked point RELAY _ B is a coil of a RELAY connected to, the other end of the bidirectional voltage regulator D15 is simultaneously connected with the C poles of the triode Q6 and the C pole of the Q12, the point is marked as RELAY _ A, the marked point RELAY _ A is connected to the other end of the RELAY coil, the B pole of the triode Q6 is connected to one end of the resistor R189, the other end of the resistor R189 is connected to the other end of the resistor R187 and the C pole of the triode Q11, the B pole of the triode Q11 is connected to the resistor R191, the resistor R198 and the C pole of the triode Q14, the other end of the resistor R191 is connected to the IO pin of the MCU together with the resistor R192, the point is marked as RLY _ ON, the other end of the resistor R192 is connected to the ground together with the E pole of the triode Q14, the B pole of the triode Q14 is connected to the resistor R196, the other end of the resistor R196 is connected to the resistor R190, the resistor R194 and the B pole of the triode Q10, and the other end of the resistor R190 is connected to the resistor R193, the point is marked as RLY _ OFF, the marked point RLY _ OFF is also connected to an IO port of an MCU, the other end of the resistor R193 is connected to the ground, the E pole of the triode Q10 is simultaneously connected with the resistor R195 and the B pole of the triode Q12, the other end of the resistor R194 is simultaneously connected with the other end of the resistor R195, the E pole of the triode Q12, the E pole of the triode Q13, one end of the resistor 197, the other end of the resistor R198 and the ground, and the B pole of the triode Q13 is connected with the emitter of the triode Q11 and the other end of the resistor R197.
As shown in fig. 1, there are two situations when a PLC module sends data to a remote location through pins 1-6, the first: the PLC module interacts with some network access parameters of the concentrator; and the second method comprises the following steps: and when the MCU of the electric energy meter needs to send data to the concentrator, the PLC module is used for transparent transmission. The 7 th pin on the PLC module provides a state mark, the MCU with the 7 th pin knows when the PLC module is ready to send data to the concentrator, and relay control can be effectively avoided.
As shown in fig. 2, the MCU controls the relay to be switched ON by setting the RLY _ OFF pin low and setting the RLY _ ON pin high, controls the RLY _ OFF pin high and setting the RLY _ ON pin low, and controls the RLY _ OFF pin low and setting the RLY _ ON pin low when the relay is not controlled. The transistor Q14 ensures that Q10 and Q11 cannot conduct simultaneously. The control of the opening and closing of the RELAY requires that a voltage difference of 12V between RELAY _ A and RELAY _ B is 120ms to ensure that the RELAY can be completely opened, and the consumed current is 0.75A.
As shown in table 1, energy consumption and consumed time of the electric energy meter are listed in detail, the MCU checks the state of the 7 th pin of the PLC module during 1ms interruption, and allows the relay to operate when the low level is set for 5 consecutive times, thereby ensuring that there is no long-range communication in the first 5ms when the relay is controlled, and the time for controlling the relay is 5 ms. When the PLC module needs to send data to the concentrator, the 7 th pin of the PLC module is set to be high level, and then the data is sent out after 125 ms. The level of the 7 th pin of the PLC module is pulled down when the transmission is finished, the design ensures that the remote communication is just needed when the relay is controlled, and the problem does not occur because the control time of the relay is 120ms, and the data can be transmitted to the remote module after 5ms after the relay is controlled.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (7)
1. An electric energy meter supporting dynamic energy consumption management is characterized in that: the electric energy meter comprises an electric energy meter MCU, and a remote communication module and a relay driving module which are connected with the electric energy meter MCU, and the remote communication module and the relay driving module work in a peak staggering way;
the remote communication module adopts a PLC module and a peripheral circuit, is fixed in the electric energy meter and is used for remote communication between the electric energy meter and the concentrator;
the relay driving module comprises a 3.3V power supply and a 12V relay, and the 12V relay is driven to work by the 3.3V power supply.
2. The electric energy meter supporting dynamic energy consumption management according to claim 1, wherein: the remote communication module includes: a thermistor RT4, a diode D10, resistors R1, R95, R69 and R38, capacitors C40, C42, C44, C1, C2 and C3, inductors L1, L2 and L3, transformers T1, T2 and T3 and a PLC module; one end of the resistor R1 is connected with a 3.3V power supply, the other end of the resistor R1 is connected with a state flag end (a 7-pin) of the PLC module, the state flag end is connected with a corresponding end of the electric energy meter MCU, one end of the thermistor RT4 is connected with a 12V power supply, the other end of the thermistor RT4 is connected with the anode of the diode D10, and the cathode of the diode D10 is connected with a power supply end (an 8-pin) of the PLC module;
the PLC module is communicated with the MCU through a UART serial port, 9 pins of the PLC module are used as a UART receiving end to receive data from the MCU of the electric energy meter and are marked as MCU _ RX _ G3, the UART receiving end of the PLC module is connected with one end of a capacitor C44, and the other end of the capacitor C44 is grounded;
the power supply monitoring system comprises a PLC module, a resistor R95, a capacitor C42, a capacitor C42, a 3.3V power supply, a power supply controller and a power supply controller, wherein a 10 pin of the PLC module is used as a UART sending end to send data to an electric energy meter MCU and is recorded as MCU _ TX _ G3, the UART sending end of the PLC module is simultaneously connected with one end of the resistor R95 and one end of the capacitor C42, the other end of the capacitor C42 is grounded, and the other end of the resistor R95 is connected with the 3.3V power supply;
the 11 pins of the PLC module are used as UART enabling ends to be connected with an IO port of an electric energy meter MCU and are marked as MCU _ EN _ G3, the UART enabling ends of the PLC module are simultaneously connected with one ends of a capacitor C40, a resistor R38 and a resistor R69, the other ends of the capacitor C40 and the resistor R38 are connected, and the other end of the resistor R69 is connected with a 3.3V power supply;
the grounding end of the PLC module is grounded through a pin 12;
when the UART enabling end MCU _ EN _ G3 is low, the PLC module enters a sleep state and does not consume energy, and when the UART enabling end MCU _ EN _ G3 is high, the PLC module enters a working state;
the ABC three-phase electric signals of the mains supply are respectively connected with a capacitor C1 inductor L1, a capacitor C2 inductor L2 and a capacitor C3 inductor L3 in series, then are respectively connected with one input end of a transformer T1, a transformer T2 and a transformer T3, the other input end of each of the transformers T1, the other input end of each of the transformers T2 and the other input end of each of the transformers T3 are respectively connected with the zero line of the mains supply, and two output ends of each of the transformers T1, the T2 and the T3 are respectively connected with the corresponding carrier signal input end of the PLC module.
3. The intelligent energy consumption managed electric energy meter of claim 1, wherein: the relay driving module comprises: the thermistor RT6, the resistors R218, R48, R44, R224, R186, R187, R188, R189, R190, R191, R193, R194, R195, R196, R197, R198, R192, the triode Q3, Q6, Q12, Q13, Q10, Q11, Q14 and the bidirectional regulator tube D15;
one end of the thermistor RT6 is connected with a 12V power supply, the other end of the thermistor RT6 is respectively connected with one ends of resistors R218 and R224, the other end of the resistor R218 is connected with a resistor R48 in series, the other end of the resistor R224 is connected with a resistor R44 in series, the resistors R48 and R44 are connected, the connection points of the resistors R186 and R187 are respectively connected with one ends of resistors R186 and R187, and E poles of triodes Q3 and Q6, the other end of the resistor R186 is connected with one end of a resistor R188 and C pole of the triode Q10, the other end of the resistor R188 is connected with B pole of the triode Q3, C pole of the triode Q3 is simultaneously connected with one end of a bidirectional voltage regulator D15 and C pole of the triode Q13, the point is marked as RELAY _ B, and the marked point RELAY _ B is connected with one end of a RELAY coil; the other end of the bidirectional voltage-stabilizing tube D15 is connected with the C poles of triodes Q6 and Q12, the point is marked as RELAY _ A, the marked point RELAY _ A is connected with the other end of a RELAY coil, the B pole of the triode Q6 is connected with the C pole of a resistor R187 and the C pole of the triode Q11 after being connected with an R189 in series respectively, the B pole of the triode Q11 is connected with the C poles of resistors R191 and R198 and a triode Q14 simultaneously, the other end of the resistor R191 is connected with a resistor R192, the connecting point is connected with an IO pin of an electric energy meter MCU, the marked point is RLY _ ON, the other end of the resistor R192 is connected with the E pole of the triode Q14 in ground, the B pole of the triode Q14 is connected with a resistor R196 in series and then connected with the B poles of the resistors R190 and R194 and the triode Q10 simultaneously, the other end of the resistor R190 is connected with the resistor R193, the marked point is RLY _ OFF, and the marked point is also connected to the corresponding IO port of the electric energy meter MCU, the other end of the resistor R193 is grounded, the E pole of the triode Q10 is connected with the B poles of the resistor R195 and the triode Q12, the other ends of the resistors R194, R195 and R198 and the E poles of the triodes Q12 and Q13 are grounded, the E pole of the triode Q11 is connected with the B pole of the triode Q13, and the connection point is grounded after being connected with the resistor 197 in series.
4. An energy consumption management method for an electric energy meter supporting dynamic energy consumption management, wherein the electric energy meter of any one of claims 1-3 is applied, and the method comprises the following steps: the method enables the relay and the remote communication module to work in a peak staggering way, and specifically comprises the following steps:
the first step is as follows: detecting the state of a 7 th pin which is a state flag end of the PLC module by the electric energy meter MCU during interruption, and allowing the relay to act when the PLC module is continuously detected to be low level for n times;
the second step is that: when the PLC module needs to send data to the concentrator, the state flag end of the PLC module, namely the 7 th pin, is set to be high level, and then the data is sent to the concentrator after the time T1 is delayed; when the transmission is finished, the level of the PLC module state flag end is pulled down;
the third step: when the relay driving module needs to operate the relay, whether the relay is allowed to be operated is judged according to the result of the first step, if the relay is allowed to be operated, the relay is operated, the relay operation time is T2, and T2 is less than T1; otherwise, returning to the first step.
5. The energy consumption management method of an electric energy meter supporting dynamic energy consumption management according to claim 4, characterized in that: in the first step, when the detection is low for 5 times, the relay is allowed to act.
6. The energy consumption management method of an electric energy meter supporting dynamic energy consumption management according to claim 4, characterized in that: in the second step, the delay time T1 is 125 ms; the operating relay time T2 is 120 ms.
7. The energy consumption management method of an electric energy meter supporting dynamic energy consumption management according to claim 4, characterized in that: in the first step, the interruption time is 1 ms.
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| CN111796653A (en) * | 2020-09-08 | 2020-10-20 | 苏州浪潮智能科技有限公司 | Device for controlling hard disk to be powered on and storage equipment |
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| CN203787351U (en) * | 2013-12-30 | 2014-08-20 | 广东瑞德智能科技股份有限公司 | Relay drive circuit |
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