CN202837887U - Power relay system capable of communicating wirelessly - Google Patents

Abstract

The utility model discloses a power relay system capable of communicating wirelessly. The power relay system is characterized by comprising a shell, a power input terminal, a relay output terminal, an indicating lamp, a radio frequency single-chip module, a power module, a power relay module and a remote control center, wherein the power input terminal of the power relay system capable of communicating wirelessly is connected with an alternating-current power supply; and a common end pin, a normally open end pin and a normally closed end pin of the relay output terminal are connected with a load. According to the utility model, the switch-on/off of a power relay is controlled according to a monitored wireless packet on one hand, and the current state of the power relay is wirelessly fed back to the remote control center.

Description

But the power relay system of wireless telecommunications

Technical field

The utility model belongs to industrial automatic control and wireless communication technique field, is specifically related to a kind of equipment and using method thereof of utilizing wireless communication technique to realize power relay is controlled automatically.

Background technology

Relay is a kind of electronic control device, it has control system (claim not only input circuit) and by control system (but also claiming output loop), usually be applied in the automatic control circuit, it is actually a kind of " automatic switch " that removes to control larger electric current with less electric current.Therefore in circuit, play the effects such as automatic adjusting, safeguard protection, change-over circuit.

The control of traditional power relay all is to adopt wired control mode, yet, the occasion that enters in some personnel's inconvenience, perhaps the relay long-distance distribution is in the situation that many places, and wired control mode just seems and is not suitable for.

Summary of the invention

But the technical problems to be solved in the utility model provides a kind of power relay system and using method thereof of wireless telecommunications, solved the occasion that enters in some personnel's inconvenience, perhaps the power relay long-distance distribution is in the situation that many places, the problem of Long-distance Control power relay.

In order to solve these problems of the prior art, the technical scheme that the utility model provides is:

But a kind of power relay system of wireless telecommunications, it is characterized in that: but the power relay system of described wireless telecommunications is by shell, power input terminal, relay output end, pilot lamp, the radio frequency one-chip computer module, power module, the power relay module, remote control center forms, described power input terminal is used for connecting AC power, relay output end is used for connecting load, described pilot lamp is by signal lamp, status indicator lamp and alarm lamp form, described radio frequency one-chip computer module is used for the state of the wireless package of monitoring air, if monitor the control command package, then resolve the content in the package, and according to the closed of its content-control power relay module or disconnect, the closed and disconnected that is represented relay module by status indicator lamp, if the radio frequency one-chip computer module monitors the status poll package, then the state wireless feedback that relay module is current is to remote control center, the function of described power relay module also is: if abnormal disconnects or closing phenomenon, the power relay module in time is wirelessly sent to remote control center with abnormal occurrence, and lights alarm lamp.

Preferably, but the power relay system of described wireless telecommunications, it is characterized in that for strengthening transmission range and the penetration capacity of wireless signal, the prevention at radio-frequency port of radio frequency one-chip computer module need increase the radio-frequency (RF) power amplification circuit module, establishes transmission range and penetration capacity that the radio-frequency (RF) power amplification chip is used for strengthening wireless signal in the radio-frequency (RF) power amplification circuit module.

As preferably, described radio-frequency (RF) power amplification circuit module is characterized in that also need comprising two channel selector switchs except the radio-frequency (RF) power amplification chip, is used for switching the sending and receiving of radiofrequency signal.

Preferably, but the power relay system of described wireless telecommunications is characterized in that power module comprises AC-DC power and transforms chip, for AC power is converted to direct supply.

Preferably, but the power relay system of described wireless telecommunications, it is characterized in that power module comprises rectification, filtering, transformation and voltage stabilizing circuit module, the required DC voltage of radio-frequency (RF) power amplification of power relay module repeat circuit coil and radio frequency power amplification modules is provided.

Preferably, but the power relay system of described wireless telecommunications is characterized in that power module also comprises power management chip, and DC voltage is depressurized to the required operating voltage of radio frequency single-chip microcomputer.

Preferably, but the power relay system of described wireless telecommunications is characterized in that the outside of radio frequency one-chip computer module connects the high frequency quartz oscillator.

Preferably, but the power relay system of described wireless telecommunications is characterized in that the prevention at radio-frequency port of radio frequency one-chip computer module connects balun circuit, impedance matching circuit and antenna.

As preferably, described power relay has common port pin, Chang Kaiduan pin and normal-closed end pin.

But another purpose of the present utility model is to provide a kind of using method of power relay system of wireless telecommunications, it is characterized in that said method comprising the steps of:

(1) but with the power input sub-connection AC power of the power relay system of wireless telecommunications;

(2) but with the relay output end sub-connection load of the power relay system of wireless telecommunications: common port connects load power source, and it is anodal that Chang Kaiduan or normal-closed end connect load;

(3) rear signal lamp periodically glimmers but the power relay system of wireless telecommunications powers on, and its radio frequency single-chip microcomputer is in the state of wireless package in the monitoring air always;

(4) if monitor the control command package, then resolve the content in the package, and according to its content-control relay closes or disconnection, status indicator lamp is lighted and is extinguished and represents respectively relay closes and disconnection;

(5) if monitor the status poll package, then the state wireless feedback that relay is current is to remote control center;

(6) if abnormal disconnects or closing phenomenon, but the power relay system of wireless telecommunications in time is wirelessly sent to remote control center with abnormal occurrence, and lights alarm lamp.

With respect to scheme of the prior art, the utility model has the advantages that: low cost, long transmission distance, penetration capacity are strong, Interface design and upper-layer protocol are relatively simple, are more suitable in the far distance controlled power relay, realize quickly and easily the robotization control to terminator.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further described:

But Fig. 1 is the power relay system architecture diagram of wireless telecommunications among the embodiment of the present utility model;

Fig. 2 is power module circuitry schematic diagram among the embodiment of the present utility model;

Fig. 3 is radio frequency one-chip computer module circuit theory diagrams among the embodiment of the present utility model;

Fig. 4 is power relay module controls schematic diagram among the embodiment of the present utility model;

But Fig. 5 is the workflow diagram of the power relay system of wireless telecommunications among the embodiment of the present utility model;

Embodiment

Below in conjunction with specific embodiment such scheme is described further.Should be understood that these embodiment are not limited to limit scope of the present utility model for explanation the utility model.The implementation condition that adopts among the embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in the normal experiment.

But the power relay system of a kind of wireless telecommunications of embodiment

Such as Fig. 1, but the power relay system of the wireless telecommunications of the present embodiment adopts structure as shown in Figure 1, wherein comprises: shell 1, power input terminal 2, relay output end (comprising common port pin 3, Chang Kaiduan pin 4, normal-closed end pin 5), pilot lamp, radio frequency one-chip computer module, power module and power relay module.Wherein, but the shell sizes of the power relay system of wireless telecommunications is 82*50*32MM.Power input terminal is the green phoenix terminals of 2 PIN, places the housing exterior left side, is used for connecting 85 ~ 265 V AC power.Relay output end is the green phoenix terminals of 3 PIN, places the housing exterior right side, is used for connecting load.The load maximum a.c. voltage is 277V AC, and maximum DC voltage is 30V, and maximum current is 10A.Signal lamp is red, places the housing exterior left side, but this pilot lamp will be every the 2S flicker once after the power relay system of wireless telecommunications powered on.It is green and yellow that status indicator lamp and alarm lamp are respectively, and all places the housing exterior right side, and status indicator lamp is lighted and extinguished and represents respectively the power relay closed and disconnected.When the abnormal situation, alarm lamp is lighted, and unusually removes the alarm pilot lamp and extinguishes.Radio frequency one-chip computer module, power module and power relay module etc. all place enclosure.

Below but the power relay system various piece of wireless telecommunications is described in detail:

For strengthening transmission range and the penetration capacity of wireless signal, the prevention at radio-frequency port of radio frequency one-chip computer module increases the radio-frequency (RF) power amplification circuit module.The radio-frequency (RF) power amplification circuit module also comprises two channel selector switchs except the radio-frequency (RF) power amplification chip, T/R switch 10 and T/R switch 11 are used for switching the sending and receiving of radiofrequency signal.Its physical circuit connected mode as shown in Figure 3.

The power module that the present embodiment adopts comprises AC-DC power and transforms chip, and rectification, filtering, transformation and voltage stabilizing circuit module, be used for AC power is converted to direct supply, relay coil in the power relay module and the required DC voltage of radio-frequency (RF) power amplification of radio frequency power amplification modules are provided.The model that AC-DC power transforms chip is LNK625, and its physical circuit connected mode as shown in Figure 2.

But the power module of the power relay system of wireless telecommunications adopts 220V AC input as shown in Figure 2, because the operating voltage of power relay coil working voltage and radio frequency low-noise amplifier is 5V DC, so use high-effect, off-line type switch chip LNK625 with the accurate constant voltage control of primary side to carry out the combined-voltage conversion.LNK625 has adopted the control technology of innovation, need not optical coupler and secondary constant-voltage control circuit, and can provide very strict output voltage to regulate, and therefore can greatly simplify the design of low-power constant voltage converter.Integrated 700 V power MOSFET, ON/OFF state of a control machine, auto bias circuit, frequency modulation (PFM), Cycle by Cycle current limit and a sluggish hot breaking circuit in the chip.

LNK625 provides 4 kinds of functional pins, is respectively:

Drain electrode (D) pin: the drain electrode tie point of power MOSFET.The built-in function electric current is provided when unlatching and steady operation.

Bypass (BP) pin: an external bypass capacitors is connected to this pin, is used for generating the power supply of inner 6 V.

Feedback (FB) pin: under normal operation, the thus pin control of the switch of power MOSFET.This pin can detect the AC voltage on the biasing winding.This control inputs mode can be come regulation output voltage according to the anti-sharp voltage on the biasing winding.

Source electrode (S) pin: this pin is connected internally to the source electrode of MOSFET, is used for the return node of high-voltage power and the reference point of control circuit.

2 tunnel output primary side voltage stabilizing flyback power supply circuit that use LNK625 designs as shown in Figure 1.Under 110V AC/220 V AC initial conditions, efficient surpasses 67%; Under 220 VAC initial conditions, unloaded power input is less than 140 mW.

The 220V ac input voltage carries out bridge rectifier by diode D1 to D4.Carry out filtering by large bulk capacitance C1 and C2 after the rectification.Inductance L 1, C1 and C2 form a pi type filter, and differential mode Conducted EMI noise is decayed.This configuration is so that the design in the situation that need not to use Y electric capacity can satisfy the 55022 B level requirements of EMI standard EN, and has larger allowance.Fuse F1 provides the catastrophic failure protection.

LNK625 is integrated device for power switching, oscillator, constant voltage control engine, startup and defencive function.700 integrated V MOSFET can provide very large drain voltage allowance in universal input AC uses, can improve reliability by using larger transformer turn ratio, and reduce the voltage stress of output diode.This device can be realized self-powered fully by bypass pin and decoupling capacitance C8.The design has added a biasing circuit (D7, C7 and R5), power consumption is inputted in zero load be down to below 140 mW.Be added in a side of transformer T armature winding through the input voltage of rectification and filtering.The opposite side of integrated MOSFET driving transformer armature winding among the LNK625.D5, R1, R2 and C3 form clamp circuit, and the drain voltage spike that leakage inductance is caused limits.

The secondary of transformer carries out rectification by D6, for reducing high frequency oscillation and relevant radiation EMI, added the RC buffer circuit that is comprised of R3 and C4 at D6.Carry out filtering by large bulk capacitance C5 and C6 after the rectification.Inductance L 2, C5 and C6 form a pi type filter.

LNK625 controls regulation output with ON/OFF, and concrete grammar is to enable or the disable switch cycle according to the sampled voltage on the feedback pin.Output voltage detect to be to be carried out with reference to winding by elementary on the transformer T, need not optical coupler and secondary testing circuit.The resitstance voltage divider that is comprised of R7 and R8 is with winding voltage feed-in LNK625.1% resistance value of standard is used for rated output voltage is controlled at the center.Resistance R 6 and C8 can produce and proportional bias voltage of continuous enable switch cycle, thereby reduce the generation of burst of pulses phenomenon.

Described power module also comprises power management chip, and its model is ASM117-3.3, and DC voltage is depressurized to the required operating voltage 3.3V of radio frequency single-chip microcomputer.

As shown in Figure 3, radio frequency single-chip microcomputer model is CC1110F16 in the radio frequency monolithic module that the present embodiment adopts, and the radio frequency operation frequency range is 433MHz.Its outside high frequency quartz oscillator that connects, frequency is 26MHz, is encapsulated as 3225.The prevention at radio-frequency port of radio frequency one-chip computer module connects balun circuit 6, impedance matching circuit 7 and 433MHz spring antenna 8.

The CC1110 radio frequency singlechip chip that the microprocessor of radio frequency one-chip computer module adopts TIX to produce, CC1110 is the real wireless SOC of a kind of low cost, uses for low-consumption wireless and designs.Enhancement mode 8051MCU and a radio transmitting and receiving chip CC1100 that this chip has comprised a standard are encapsulated in the chip of a 6 * 6mm.8051MCU carries 32K Flash and 4K RAM.Radio communication operates mainly in 315,433,868 and the ISM(of 915MHz industry, science and medical science) and the SRD(short-range device) frequency band, can freely be set to 300-348 MHz, 391-464 MHz and 728-928 MHz in ISM band.

The CC1110 radio-frequency (RF) transceiver is integrated highly configurable modulator-demodular unit.This modulator-demodular unit is supported different modulation formats, and its data transmission rate can reach 500kbps.Be integrated in forward error recovery option on the modulator-demodular unit by unlatching, performance is got a promotion.CC1110 provides widely hardware supported for processing data packets, data buffering, burst transfers of data, clear channel estimating, quality of connection indication and electromagnetic wave excites.In addition, CC1110 also comprises park mode timer, electrify restoration circuit (Power On Reset), power-fail detection circuit (Brown Out Detection) and 21 programmable I/O pins of analog-digital converter (ADC), timer (Timer), AES128 coprocessor, WatchDog Timer (Watchdog Timer), 32 kHz crystal oscillators.

The current drain of 0.3uA under the CC1110 radio frequency singlechip chip sleep pattern.The programmable data transfer rate can be as high as 500kBaud, and when speed was 1.2kBaud, CC1110 was under reception and emission mode, and current loss is lower than respectively 16.2 mA or 16 mA.The park mode of CC1110 and the characteristic that is transformed into the ultra-short Time of aggressive mode are particularly suitable for those and require the very long application of battery life.Maximum sensitivity reaches-110dBm, and radio frequency power output able to programme is up to 10dBm.

The CC1110 chip has been simplified the design process of RF circuit greatly as long as the only a few peripheral cell just can be built SoC reliable and stable and low in energy consumption.The sensor node of design is operated in 433 MHz frequency ranges.Fig. 3 is the reference design that CC1110 cooperates radio-frequency (RF) power amplification to use, and mainly is comprised of CC1110 chip, radio frequency matching circuit, T/R switch, radio-frequency (RF) power amplification and other peripheral cells.

The supply voltage of CC1110 is 3.3V, and the chip back bottom needs ground connection.R1 is direct current biasing resistance, and C7 is decoupling capacitor.Balun circuit 6 is comprised of L1, L2, C1 and C2, realizes the Balanced or unbalanced conversion.Impedance matching circuit 7 is comprised of L3, L4, C4, C5 and C6, be used for the matching chip input, output-resistor, making its input, output-resistor is 50 Ω, simultaneously, and for PA (power amplifier) and the LNA (low noise amplifier) of chip internal provides direct current biasing.The RF signal of CC1110 adopts differential mode, and in 433 MHz frequency ranges, its best differential impedance is 116+j41 Ω.The T/R switch is used for switching the radio frequency sending and receiving, and when sending data packet, the T/R switching over makes radiofrequency signal realize power amplification through radio-frequency (RF) power amplification (PA) to (T) state of transmission; When the receive data package, the T/R switching over is to (R) state of reception, and this moment, radiofrequency signal need not through radio-frequency (RF) power amplification, can directly be received by CC1110.

Fig. 4 is power relay module controls schematic diagram, wherein the model of power relay is HF3FF in the power relay module, have one group of normally opened contact and one group of normally closed contact, maximum switched voltage is 277V AC and 30V DC, maximum switch current is 10A, the rated voltage of coil is 5V, and operation voltage is 3.8 V.

RELAY_CTRL is connected to the I/O port of radio frequency one-chip computer module among the figure, during this port high level, and triode Q1 conducting, triode Q2 conducting, the coil of power relay powers on, and power relay is closed; During RELAY_CTRL port low level, triode Q1 cut-off, triode Q2 cut-off, the coil losing electricity of power relay, power relay disconnects.

Drive software uses the IAR software platform to write in the present embodiment radio frequency one-chip computer module, but the workflow diagram of the power relay system of wireless telecommunications as shown in Figure 5.Concrete using method may further comprise the steps:

(1) but with the power input sub-connection AC power of the power relay system of wireless telecommunications;

(2) but with the relay output end sub-connection load of the power relay system of wireless telecommunications: common port pin 5 connects load power sources, and it is anodal that Chang Kaiduan pin 4 or normal-closed end pin 3 connect loads;

(3) rear signal lamp periodically glimmers but the power relay system of wireless telecommunications powers on, and its radio frequency single-chip microcomputer is in the state of wireless package in the monitoring air always;

(4) if monitor the control command package, then resolve the content in the package, and according to its content-control relay closes or disconnection, the state indication is lighted and is extinguished and represents respectively relay closes and disconnection;

(5) if monitor the status poll package, then the state wireless feedback that relay is current is to long-range control center;

(6) if abnormal disconnects or closing phenomenon, but the power relay system of wireless telecommunications in time is wirelessly transmitted to remote control center with abnormal occurrence, and lights alarm lamp.

This processing has a starting point, shown in piece 12, but piece 13 expressions are with the power input sub-connection AC power of the power relay system of wireless telecommunications, but the relay output end sub-connection load that piece 14 represents the power relay system of wireless telecommunications: the common port pin connects load power source, it is anodal that Chang Kaiduan pin or normal-closed end pin connect load, and piece 15 represents the next hardware and software of intiating radio signal relay.

Rear signal lamp periodically glimmers but the power relay system of wireless telecommunications powers on, its radio frequency single-chip microcomputer is in the state of wireless package in the monitoring air always, shown in piece 16, if monitor the control command package, then resolve the content in the package, shown in piece 22, and according to its content-control relay closes or disconnection, shown in piece 25,26, status indicator lamp is lighted and is extinguished and represents respectively relay closes and disconnection, shown in piece 27,28; If monitor the status poll package, then the state wireless feedback that relay is current is to remote control center, shown in piece 23.

If abnormal disconnects or closing phenomenon, the wireless signal relay in time is wirelessly transmitted to remote control center with abnormal occurrence shown in piece 16, shown in piece 17, and lights alarm lamp; If no exceptions disconnection or closing phenomenon but overtime phenomenon has occured, shown in piece 18, then signal lamp flicker is shown in piece 19; If then monitoring wireless package of overtime phenomenon does not occur, shown in piece 20.

Above-mentioned example only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the people who is familiar with technique can understand content of the present utility model and according to this enforcement, can not limit protection domain of the present utility model with this.All equivalent transformation or modifications of doing according to the utility model Spirit Essence all should be encompassed within the protection domain of the present utility model.

In sum: the utility model has the advantage of: but the power relay system of wireless telecommunications not only saves cable and quantities, and rapidly in time.Use the free 433MHz ISM band in the whole world, without Internet utilization fee usefulness, also can not be limited by the flow, obstruction of common network etc., and maintenance cost is low.

Claims (1)

1. but the power relay system of wireless telecommunications, it is characterized in that: but the power relay system of described wireless telecommunications is by shell, power input terminal, relay output end, pilot lamp, the radio frequency one-chip computer module, power module, power relay module and remote control center form, described power input terminal is used for connecting AC power, relay output end is used for connecting load, described pilot lamp is by signal lamp, status indicator lamp and alarm lamp form, described radio frequency one-chip computer module is used for the state of the wireless package of monitoring air, if monitor the control command package, then resolve the content in the package, and according to the closed of its content-control power relay module or disconnect, the closed and disconnected that is represented relay module by status indicator lamp, if the radio frequency one-chip computer module monitors the status poll package, then the state wireless feedback that relay module is current is to remote control center, the prevention at radio-frequency port of described radio frequency one-chip computer module increases the radio-frequency (RF) power amplification circuit module, establish the radio-frequency (RF) power amplification chip in the radio-frequency (RF) power amplification circuit module and be used for strengthening transmission range and the penetration capacity of wireless signal, described power module comprises rectification, filtering, transformation and voltage stabilizing circuit module, the required DC voltage of radio-frequency (RF) power amplification of power relay module repeat circuit coil and radio frequency power amplification modules is provided, the function of described power relay module also is: if abnormal disconnects or closing phenomenon, the power relay module in time is wirelessly sent to remote control center with abnormal occurrence, and lights alarm lamp.

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