CN103545932A - A remote controllable PDU - Google Patents

Abstract

The invention relates to the technical field of electronic circuits, in particular to a PDU capable of being remotely controlled, which comprises: the invention discloses a PDU (protocol data Unit), which comprises a signal transceiver, a DSP (digital signal processor), an output control circuit and a plurality of output switches, wherein the signal transceiver is connected with a first input end of the DSP, an output end of the DSP is connected with the output control circuit, the signal transceiver comprises an SIM (subscriber identity module) card and is used for receiving and sending short messages, the DSP is used for processing the short messages and outputting high and low levels to the output control circuit according to the content of the short messages, and the output control circuit is connected with the output switches and controls whether the output switches are powered according to the high and low levels.

Description

A remote controllable PDU

technical field

The invention relates to the technical field of electronic circuits, in particular to a remote controllable PDU.

Background technique

At present, many PDU (Power Distribution Unit, power distribution unit) devices only have sockets or alarm functions. If there is a problem with the PDU or needs to be operated, the user must go to the site to solve it or stay on duty for a long time, wasting manpower, material resources and other resources.

Contents of the invention

The purpose of the present invention is to provide a remotely controllable PDU, which can remotely control the opening and closing of the PDU, and improves the practicability of the PDU.

For reaching this purpose, the present invention adopts following technical scheme:

A remotely controllable PDU, comprising: a signal transceiver, a DSP signal processor, an output control circuit and several output switches, the signal transceiver is connected to the first input end of the DSP signal processor, and the DSP signal processing The output end of the device is connected with the output control circuit, the signal transceiver includes a SIM card, used to receive and send short messages, and the DSP signal processor is used to process the short messages, and output high and low levels according to the content of the short messages To the output control circuit, the output control circuit is connected with several output switches, and controls whether the several output switches have power according to the high and low levels.

Wherein, the format of the short message is the format preset by the DSP signal processor, and the contact number in the SIM card is the preset user's mobile phone number.

Wherein, it also includes: a temperature sensor, a humidity sensor and a surge protector, the temperature sensor is connected to the second input end of the DSP signal processor, and the humidity sensor is connected to the third input end of the DSP signal processor.

Wherein, when the temperature sensor detects that the temperature exceeds the preset temperature, the temperature sensor sends an over-temperature signal to the DSP signal processor, and the DSP signal processor sends a preset short message to the preset user mobile phone number through the SIM card.

Wherein, when the humidity sensor detects that the humidity exceeds the preset humidity, the humidity sensor sends an over-humidity signal to the DSP signal processor, and the DSP signal processor sends a preset short message to the preset user mobile phone number through the SIM card.

Among them, the model of the DSP signal processor is TMS320F2802P, the output high level is 3.3V, and the output low level is 0.0V.

Wherein, the temperature sensor model is: KSD301, and the humidity sensor model is: YD-HTC.

Wherein, the output switch includes an output socket, and the output control circuit includes n sub-control circuits, wherein n is the number of output sockets that the PDU can control. Correspondingly, the DSP signal processor also has n output terminals, and each output terminal Corresponding to a sub-control circuit, taking the first output terminal I/O-1 of the DSP signal processor as an example, the corresponding sub-control circuit includes: transistor Q1, relay JQ1, resistors R1, R2, R3, and light-emitting diode D1, wherein , the first output terminal I/O-1 of the DSP signal processor is connected to the base of Q1, the collector of Q1 is connected to one end of R3 and the pin 1 of JQ1, and the other end of R3 is connected to +12V On the DC power supply, the emitter of Q1 is grounded, the pin 2 of JQ1 is connected to the +12V DC power supply, the pin 4 of JQ1 is connected to the pin 4 of JQ2, ... the pin 4 of JQn and one end of the surge protector Together, the other end of the surge protector is connected to the live wire L of the external power supply, the pin 5 of JQ1 is suspended, the pin 3 of JQ1 is connected to one end of R1 and one end of the first port L1, and the other end of R1 is connected to R2 The other end of R2 is connected to the input end of D1, the output end of D1 is connected to the neutral line N of the external power supply, the other end of the first port L1 is connected to the fire wire terminal of the first output socket 1, the first output socket The neutral wire terminal of 1 is connected to the neutral wire N of the external power supply, and the ground wire terminal of the first output socket 1 is grounded.

Further, the output switch is an air switch, and the air switch includes a single-phase air switch and a three-phase air switch.

The beneficial effects of the present invention are: a remote-controllable PDU, comprising: a signal transceiver, a DSP signal processor, an output control circuit and several output switches, the signal transceiver and the first input end of the DSP signal processor connected, the output of the DSP signal processor is connected to the output control circuit, the signal transceiver includes a SIM card for receiving and sending short messages, and the DSP signal processor is used for processing and sending the short messages, and Output the high and low levels to the output control circuit according to the content of the short message, the output control circuit is connected with several output switches, and controls whether the several output switches have electricity according to the high and low levels, the present invention uses the SIM card The short message is used to remotely control the opening and closing of the PDU, so that the PDU can be in an unattended state, which improves the practicability and intelligence of the PDU, and saves resources such as manpower and material resources.

Description of drawings

FIG. 1 is a schematic structural diagram of a remotely controllable PDU provided by Embodiment 1 of the present invention;

FIG. 2 is a specific circuit diagram of a remotely controllable PDU provided in Embodiment 2 of the present invention.

Detailed ways

The technical solution of the present invention will be further described below with reference to FIG. 1 and FIG. 2 and through specific implementation methods.

Embodiment one

FIG. 1 is a schematic structural diagram of a remotely controllable PDU provided by Embodiment 1 of the present invention.

A remotely controllable PDU, comprising: a signal transceiver, a DSP signal processor, an output control circuit and several output switches, the signal transceiver is connected to the first input end of the DSP signal processor, and the DSP signal processing The output end of the device is connected with the output control circuit, the signal transceiver includes a SIM card, used to receive and send short messages, and the DSP signal processor is used to process the short messages, and output high and low levels according to the content of the short messages To the output control circuit, the output control circuit is connected with several output switches, and controls whether the several output switches have power according to the high and low levels.

In this embodiment, the PDU is remotely controlled to be turned on and off by means of a SIM card short message, so that the PDU can be in an unattended state, which improves the practicability and intelligence of the PDU, and saves resources such as manpower and material resources.

In this embodiment, the format of the short message is the format preset by the DSP signal processor, and the contact number in the SIM card is the preset user mobile phone number. In this embodiment, the output switch in the PDU is for an air conditioner and A water heater is powered, and the DSP signal processor is preset to identify the letters as follows: KTK means the air conditioner is on, KTG means the air conditioner is off, RSQK means the water heater is on, RSQG means the water heater is off, when the air conditioner user wants to remotely turn off the corresponding output switch of the air conditioner , it is necessary to send a "KTG" short message to the SIM card in the PDU, and the SIM card sends an instruction to the DSP signal processor according to the short message, and the output terminal corresponding to the DSP signal processor and the air conditioner outputs a low level, and the corresponding output control The circuit cuts off the power supply of the output switch corresponding to the air conditioner; when the air conditioner user wants to remotely turn on the output switch corresponding to the air conditioner, he needs to send a "KTK" short message to the SIM card in the PDU, and the SIM card sends instructions to the DSP according to the short message The signal processor, the DSP signal processor and the output end corresponding to the air conditioner output a high level, and the corresponding output control circuit turns on the power supply of the output switch corresponding to the air conditioner.

As another embodiment, the format preset by the DSP signal processor may also be other formats, such as Chinese character recognition.

In this embodiment, the contact number in the SIM card is a preset user's mobile phone number, such as an air conditioner user and a water heater user. Only then can the SIM card send a short message to remotely control the PDU.

In this embodiment, it also includes: a temperature sensor, a humidity sensor and a surge protector, the temperature sensor is connected with the second input end of the DSP signal processor, and the humidity sensor is connected with the third input end of the DSP signal processor connected.

In this embodiment, when the temperature sensor detects that the temperature exceeds the preset temperature, the temperature sensor sends an over-temperature signal to the DSP signal processor, and the DSP signal processor sends a preset short message to the preset user mobile phone through the SIM card. Number.

In this embodiment, when the humidity sensor detects that the humidity exceeds the preset humidity, the humidity sensor sends an over-humidity signal to the DSP signal processor, and the DSP signal processor sends a preset short message to the preset user mobile phone through the SIM card. Number.

In this embodiment, the model of the DSP signal processor is TMS320F2802P, the output high level is 3.3V, and the output low level is 0.0V.

In this embodiment, the model of the temperature sensor is: KSD301, the default preset temperature of the temperature sensor of this model is 40° C., and the model of the humidity sensor is: YD-HTC.

Embodiment two

As shown in Figure 2, it is a specific circuit diagram of a PDU that can be remotely controlled.

In this embodiment, the output switch includes an output socket, and the output control circuit includes n sub-control circuits, where n is the number of output sockets that the PDU can control. Correspondingly, the DSP signal processor also has n output sockets. Each output terminal corresponds to a sub-control circuit. Taking the first output terminal I/O-1 of the DSP signal processor as an example, the corresponding sub-control circuit includes: transistor Q1, relay JQ1, resistors R1, R2, R3 , light-emitting diode D1, wherein, the first output terminal I/O-1 of described DSP signal processor is connected with the base of Q1, the collector of Q1 is connected with one end of R3 and the pin 1 of JQ1, and the pin 1 of R3 The other end is connected to the +12V DC power supply, the emitter of Q1 is grounded, the pin 2 of JQ1 is connected to the +12V DC power supply, the pin 4 of JQ1 and the pin 4 of JQ2, ... the pin 4 of JQn and the wave One end of the surge protector is connected together, the other end of the surge protector is connected to the live wire L of the external power supply, the pin 5 of JQ1 is suspended, and the pin 3 of JQ1 is connected to one end of R1 and one end of the first port L1. The other end of R1 is connected to one end of R2, the other end of R2 is connected to the input end of D1, the output end of D1 is connected to the neutral line N of the external power supply, and the other end of the first port L1 is connected to the fire wire connection of the first output socket 1 Terminals, the neutral terminal of the first output socket 1 is connected to the neutral line N of the external power supply, and the ground terminal of the first output socket 1 is grounded.

In Fig. 2, the second output terminal I/O-2 of the DSP signal processor is connected to the base of Q2, the collector of Q2 is connected to one end of R6 and the pin 1 of JQ2, and the other end of R6 is connected to To the +12V DC power supply, the emitter of Q2 is grounded, the pin 2 of JQ2 is connected to the +12V DC power supply, the pin 5 of JQ2 is suspended, and the pin 3 of JQ2 is connected to one end of R4 and one end of the second port L2 Together, the other end of R4 is connected to one end of R5, the other end of R5 is connected to the input end of D2, the output end of D2 is connected to the neutral line N of the external power supply, and the other end of the second port L2 is connected to the second output socket 2 The live wire terminal of the second output socket 2 is connected to the neutral wire N of the external power supply, and the ground wire terminal of the second output socket 2 is grounded.

In Fig. 2, the Nth output terminal I/O-n of described DSP signal processor is connected with the base of Qn, the collector of Qn is connected together with one end of R3n and the pin 1 of JQn, and the other end of R3n is connected to + On the 12V DC power supply, the emitter of Qn is grounded, the pin 2 of JQn is connected to the +12V DC power supply, the pin 5 of JQn is suspended, the pin 3 of JQn is connected to one end of R(3n-2) and the Nth port Ln One end of R(3n-2) is connected to one end of R(3n-1), the other end of R(3n-1) is connected to the input end of Dn, and the output end of Dn is connected to the external power zero Line N connection, the other end of the Nth port Ln is connected to the live wire terminal of the Nth output socket n, the neutral line terminal of the Nth output socket n is connected to the neutral line N of the external power supply, and the ground wire of the Nth output socket n is connected The terminal is grounded.

In this embodiment, the model of the DSP signal processor is TMS320F2802P, which can have up to 100 output terminals, the output socket 1, ... the output socket n, the model is M-301, has flame-retardant function, and is a single-phase three-hole socket , Transistors Q1, Q2,...Qn, model 2222; relays JQ1, JQ2,...JQn, model 801H-1A-C; resistors R1, R2, R3,...R3n, model 0.25W metal film.

In this embodiment, the light-emitting diode is used to detect whether the corresponding output socket has power, and if there is power, the light-emitting diode is turned on.

In this embodiment, when the PDU input is normal, the n output terminals I/O-1, I/O-2, ... I/O-n of the DSP signal processor output a low level of 0.0V, with the first Take the output terminal I/O-1 and its corresponding sub-control circuit as an example. The transistor Q1 is in the cut-off state, and the coil of the relay JQ1, that is, the voltage at both ends of pin 1 and pin 2 is +12V. There is no voltage difference, and the relay does not Action, its normally closed node is conduction between pin 3 and pin 4, the external power live wire L is sent to the live wire terminal of the first output socket 1 through the first port L1, the first output socket 1 is powered, and at the same time The light-emitting diode D1 emits light, which can be used by its corresponding electrical equipment (such as an air conditioner); when the air conditioner is not required to work, the preset user corresponding to the air conditioner can use the preset user mobile phone number to send a short message "KTG" to the PDU SIM card, the SIM card sends an instruction to the DSP signal processor according to the short message, and the first output terminal I/O-1 of the DSP signal processor outputs a high level 5V. At this time, the base voltage of the transistor Q1 is greater than the emitter voltage. The collector voltage is greater than the base voltage, and the transistor Q1 meets the conduction condition. After the transistor Q1 is turned on, its collector voltage becomes 0V. At this time, the coil of the relay JQ1, that is, the voltage difference between pin 1 and pin 2 is 12V , the relay JQ1 acts, the normally closed node is disconnected between the pin 3 and the pin 4, the pin 4 is connected to the pin 5, the power transmitted to the first output socket 1 is cut off, and the light-emitting diode D1 is off, indicating that the first One output socket 1 is out of power, and the air conditioner cannot work. When the air conditioner needs to be started again, the preset user mobile phone number can be used to send a short message "KTK" to the SIM card of the PDU.

As another embodiment, the output switch is an air switch, and the air switch includes a single-phase air switch and a three-phase air switch. When it is a single-phase air switch, its output control circuit is the same as that shown in Figure 2; when it is When the three-phase air switch is used, only a slight change is required in the sub-control circuit shown in Figure 2, and two other normally closed nodes are found in each relay to control other phase lines of the external power supply.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technology can easily think of changes or replacements within the technical scope disclosed in the present invention. , should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (9)

1. A remotely controllable PDU is characterized in that it comprises: a signal transceiver, a DSP signal processor, an output control circuit and several output switches, and the signal transceiver is connected with the first input of the DSP signal processor , the output end of the DSP signal processor is connected with the output control circuit, the signal transceiver includes a SIM card for receiving and sending short messages, the DSP signal processor is used for processing the short messages, and according to the short messages output high and low levels to the output control circuit, the output control circuit is connected to several output switches, and controls whether the several output switches have power according to the high or low levels. 2. A kind of remotely controllable PDU according to claim 1, characterized in that, the format of the short message is the format preset by the DSP signal processor, and the contact number in the SIM card is a preset user mobile phone Number. 3. A kind of PDU that can be controlled remotely according to claim 2, is characterized in that, also comprises: temperature sensor, humidity sensor and surge protector, described temperature sensor is connected with the second input end of DSP signal processor , the humidity sensor is connected to the third input terminal of the DSP signal processor. 4. A kind of remotely controllable PDU according to claim 3, characterized in that, when the temperature sensor detects that the temperature exceeds a preset temperature, the temperature sensor sends an overtemperature signal to the DSP signal processor, and the DSP signal processor Send a preset short message to the preset user's mobile phone number through the SIM card. 5. A kind of remotely controllable PDU according to claim 3, characterized in that, when the humidity sensor detects that the humidity exceeds the preset humidity, the humidity sensor sends an over-humidity signal to the DSP signal processor, and the DSP signal processor Send a preset short message to the preset user's mobile phone number through the SIM card. 6 . The remote-controllable PDU according to claim 3 , wherein the model of the DSP signal processor is TMS320F2802P, the output high level is 3.3V, and the output low level is 0.0V. 7. The remote-controllable PDU according to claim 3, wherein the model of the temperature sensor is: KSD301, and the model of the humidity sensor is: YD-HTC. 8. A remotely controllable PDU according to claim 3, wherein the output switch includes an output socket, and the output control circuit includes n sub-control circuits, wherein n is an output socket that can be controlled by the PDU Correspondingly, the DSP signal processor also has n output terminals, and each output terminal corresponds to a sub-control circuit. Taking the first output terminal I/O-1 of the DSP signal processor as an example, its corresponding sub-control circuit The circuit includes: a triode Q1, a relay JQ1, resistors R1, R2, R3, and a light emitting diode D1, wherein the first output terminal I/O-1 of the DSP signal processor is connected to the base of Q1, and the collector of Q1 is connected to the base of Q1. One end of R3 and pin 1 of JQ1 are connected together, the other end of R3 is connected to +12V DC power supply, the emitter of Q1 is grounded, pin 2 of JQ1 is connected to +12V DC power supply, and pin 4 of JQ1 is connected to the +12V DC power supply. Pin 4 of JQ2, ... Pin 4 of JQn and one end of the surge protector are connected together, the other end of the surge protector is connected to the live wire L of the external power supply, pin 5 of JQ1 is suspended, and pin 3 of JQ1 Connect with one end of R1 and one end of the first port L1, the other end of R1 is connected with one end of R2, the other end of R2 is connected with the input end of D1, the output end of D1 is connected with the neutral line N of the external power supply, the first The other end of the port L1 is connected to the live wire terminal of the first output socket 1, the neutral wire terminal of the first output socket 1 is connected to the neutral wire N of the external power supply, and the ground wire terminal of the first output socket 1 is grounded. 9 . The remote-controllable PDU according to claim 3 , wherein the output switch is an air switch, and the air switch includes a single-phase air switch and a three-phase air switch.

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