CN217032583U

CN217032583U - Multi-data acquisition device for cabinet

Info

Publication number: CN217032583U
Application number: CN202220279706.6U
Authority: CN
Inventors: 戚耀刚
Original assignee: Shanghai Cangjie Intelligent Technology Co ltd
Current assignee: Shanghai Cangjie Intelligent Technology Co ltd
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2022-07-22
Anticipated expiration: 2032-02-11

Abstract

A multidata collection system for rack, including constant voltage power supply, humidity detection circuit still has, temperature detection circuit, detection circuitry is closed to the cabinet door, voltage detection circuit and control circuit, data transmission circuit, draw arc detection circuit, detection circuitry includes magnet and tongue tube is closed to the cabinet door, output sub-circuit, magnet installation cabinet door side, the tongue tube is installed in cabinet side, humidity detection circuit, temperature detection circuit, output sub-circuit, voltage detection circuit and control circuit, data transmission circuit, draw arc detection circuit install in the shell and with earth-leakage protector's experiment between the button electric connection. The novel intelligent cabinet can detect whether the humidity and the temperature in the cabinet are closed or not, whether voltage data and electrical equipment generate arc discharge or not, various data are transmitted remotely through the data transmitting circuit, remote personnel can visually know various field data, and convenience is brought to related personnel; when data overrun occurs, the main power switch can be turned off at the first time, so that potential safety hazards are reduced, and safe power supply is guaranteed.

Description

Multi-data acquisition device for cabinet

Technical Field

The utility model relates to the technical field of power supply equipment matching mechanisms, in particular to a multi-data acquisition device for a cabinet.

Background

In areas such as power distribution rooms, various types of electrical equipment such as control and protection are generally installed in cabinets (control cabinets). In order to ensure the stable operation of the electrical equipment and the safety and effectiveness of power supply, a voltage sensor, a humidity sensing alarm and a temperature sensing alarm are generally installed inside the cabinet.

Although the existing cabinet can realize on-site detection of voltage, temperature and humidity data on site, only on-site alarm can be performed after the temperature, voltage or humidity data exceed the limits, so that remote related managers cannot know specific on-site various over-limit data and accordingly cannot find out the reason of the over-limit of various data in the cabinet and perform corresponding treatment at the first time, and therefore the safe work of various electrical equipment in the cabinet cannot be effectively guaranteed; in addition, the conventional cabinet does not have a door closing detection sensor and an arc light detection sensor, when related workers do not close the cabinet door due to various reasons, various electrical devices in the cabinet are exposed outside, and other unrelated people easily cause electric shock accidents after contacting the cabinet, and due to the absence of the arc light detection function, when various electrical devices in the cabinet generate arc discharge due to various reasons (without being necessarily accompanied by a phenomenon of temperature rise in the cabinet), related people cannot deal with the arc discharge at the first time, so that the faults are expanded. Finally, when various temperatures or humidity and voltage exceeds the limit, the existing cabinet needs to manually turn off the main power switch, and as workers cannot know various exceeding conditions in the field in the first time and need a certain time to turn off the power switch in the field even if knowing that field data exceeds the standard at the far end, the probability of damaging various electrical equipment and load end electric equipment in the cabinet due to the fact that the main power switch is turned off too late is provided. In summary, it is necessary to provide a device that has the functions of detecting voltage, temperature, and humidity, closing the cabinet door, detecting electrical arcing, and transmitting various data remotely, and automatically turning off the main power switch after the various data are out of limit.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects that the sensor used by the existing cabinet only can detect the temperature, humidity and power supply voltage data in the cabinet due to limited structure, the acquired data is relatively single, potential safety hazard exists, the remote transmission of the detected data cannot be realized, remote related managers cannot know various specific field overrun data in real time, the reasons of various data overrun in the cabinet cannot be found out and corresponding treatment can not be carried out in the first time, and the main power switch needs to be manually closed when various temperatures or humidities and voltages of the cabinet exceed the limit, the utility model provides the sensor which not only has the voltage, temperature and humidity detection functions, but also can detect the closing state of a cabinet door of the cabinet and whether an arc discharge phenomenon occurs in the cabinet in real time under the combined action of related mechanisms and circuits, can also remotely transmit various data in real time, and remote personnel can effectively master various field data based on the existing mature data technology of the Internet of things, the cabinet door protection device brings convenience to relevant personnel, the relevant personnel can arrive at the site for disposal as soon as possible, when temperature, humidity, voltage and arc discharge data exceed the limit, and a main power switch can be closed as soon as possible when the cabinet door is not closed, so that potential safety hazards are reduced, and the safe power supply of the multi-data acquisition device for the cabinet is guaranteed as far as possible.

The technical scheme adopted by the utility model for solving the technical problem is as follows:

the multi-data acquisition device for the cabinet comprises a stabilized voltage power supply and is characterized by further comprising a humidity detection circuit, a temperature detection circuit, a cabinet door closing detection circuit, a voltage detection circuit, a control circuit, a data sending circuit and an arc detection circuit, wherein the cabinet door closing detection circuit comprises a magnet, a reed switch and an output sub circuit, and the magnet and the reed switch are respectively arranged on one side of a cabinet door and one side of a cabinet body of the cabinet; the humidity detection circuit, the temperature detection circuit, the output sub-circuit, the voltage detection circuit, the control circuit, the data transmission circuit and the arc detection circuit are arranged in an element box in the cabinet; the signal output ends of the humidity detection circuit, the temperature detection circuit, the cabinet door closing detection circuit, the voltage detection circuit and the arc discharge detection circuit are respectively and electrically connected with the multi-path signal input ends of the data transmission circuit and the signal input end of the control circuit; and the control signal end of the control circuit is electrically connected with the lower two contacts of the experiment button of the leakage protector in the cabinet respectively.

Furthermore, the humidity detection circuit comprises a transformer, a diode, a resistor, an electrolytic capacitor, an adjustable resistor and a humidity sensitive resistor which are electrically connected, one end of a secondary winding of the transformer is connected with one end of the humidity sensitive resistor, the anode of a first diode and one end of the first resistor, the cathode of the first diode is connected with the anode of the capacitor and one end of a second resistor, the other end of the secondary winding of the transformer is connected with the other end of the first resistor, the cathode of the capacitor and one end of the first adjustable resistor, the other end of the second resistor is connected with one end of a second adjustable resistor, and the other end of the first adjustable resistor is connected with the other end of the second adjustable resistor and the anode of the second diode.

Furthermore, the output sub-circuit of the cabinet door closing detection circuit comprises an adjustable resistor and a diode which are electrically connected and are connected with the reed pipe, one end of the reed pipe is connected with one end of the resistor and one end of the first adjustable resistor, the other end of the first adjustable resistor is connected with one end of the second adjustable resistor and the anode of the diode,

furthermore, the voltage detection circuit comprises a diode, a resistor and an adjustable resistor which are electrically connected, the cathode of the first diode is connected with one end of the resistor, the other end of the resistor is connected with one end of the first adjustable resistor, and the other end of the first adjustable resistor is connected with one end of the second adjustable resistor and the anode of the second diode.

The temperature detection circuit comprises a thermistor, a resistor, an adjustable resistor and a diode which are electrically connected, one end of the thermistor is connected with one end of the resistor, the other end of the resistor is connected with one end of a first adjustable resistor, and the other end of the first adjustable resistor is connected with one end of a second adjustable resistor and the anode of the diode.

Further, the control circuit comprises an adjustable resistor, an operational amplifier integrated circuit, a resistor, a buzzer, a PNP triode and a relay which are electrically connected, wherein a control power supply input end of the first relay is connected with a positive power supply input end, one end of a first adjustable resistor, a positive power supply input end of the operational amplifier integrated circuit and an emitting electrode of the PNP triode, the other end of the first adjustable resistor is connected with one end of a second adjustable resistor and a non-inverting input end of the operational amplifier integrated circuit, the other end of the second adjustable resistor is connected with a negative power supply input end of the operational amplifier integrated circuit, a negative power supply input end of the first relay, a negative power supply input end of the buzzer and a negative power supply input end of the second relay, an output end of the operational amplifier integrated circuit is connected with one end of the resistor, the other end of the resistor is connected with a base electrode of the PNP triode, a collecting electrode of the PNP triode is connected with the positive power supply input end of the first relay, the normally open contact end of the first relay is connected with the buzzer and the positive power supply input end of the second relay.

Furthermore, the arc discharge detection circuit comprises a diode, a resistor, an adjustable resistor and a photoresistor which are electrically connected, one end of the photoresistor is connected with one end of the resistor, the other end of the resistor is connected with one end of a first adjustable resistor, and the other end of the first adjustable resistor is connected with one end of a second adjustable resistor and the anode of the diode.

The utility model has the beneficial effects that: the novel humidity detection circuit, the temperature detection circuit, the cabinet door closing detection circuit, the voltage detection circuit and the arc detection circuit can respectively detect the humidity, the temperature and whether the cabinet door is closed and whether voltage data and electrical equipment generate arc phenomenon, various data are transmitted remotely through the data transmission circuit, remote management personnel can visually know various specific data on site through a mobile phone or a PC (personal computer) based on the existing mature internet of things data receiving, sending and displaying technology, convenience is brought to relevant personnel, and the relevant personnel can arrive at the site to be disposed at the first time when necessary; when temperature, humidity, voltage and arc discharge data exceed the limit, and the cabinet door is not closed, the control circuit can close the main power switch at the first time, so that potential safety hazards are reduced, and safe power supply is guaranteed as far as possible. Based on the above, the utility model has good application prospect.

Drawings

The utility model is further illustrated below with reference to the figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a circuit diagram of the present invention.

Detailed Description

As shown in fig. 1 and 2, the multiple data acquisition device for the cabinet includes a voltage-stabilized power supply a1, and further includes a humidity detection circuit 1, a temperature detection circuit 2, a cabinet door closing detection circuit, a voltage detection circuit 3, a control circuit 4, a data transmission circuit 5, and an arc detection circuit 9, wherein the cabinet door closing detection circuit includes a bar-shaped permanent magnet CT, a reed switch GH, and an output sub-circuit 8, the magnet CT is bonded to the right inner middle portion of a cabinet door 61 of the cabinet 6 by glue, the reed switch GH is installed in a small element box, and a movable contact is vertically located at the left end of the element box, the element box is bonded to the right inner middle portion of the cabinet body of the cabinet 6 by glue, the magnet CT is located at the left end of the reed switch GH after the cabinet door 61 is closed, and the movable contact and a fixed contact are opened by the magnetic force of the magnet CT, and the movable contact and the fixed contact are spaced by a small distance (3 mm); stabilized voltage supply A1, humidity detection circuit 1, temperature detection circuit 2, cabinet door close detection circuit's output sub-circuit 8, voltage detection circuit 3 and control circuit 4, data transmission circuit 5, draw arc detection circuit 9 and install on shell 7 inner circuit board, shell 7 is through screw nut installation back upper end in rack 6.

As shown in FIGS. 1 and 2, the regulated power supply A1 is a finished product of a 220V/12V/500W AC-to-DC 12V switching power supply module. The humidity detection circuit comprises a transformer T, diodes VD1 and VD4, resistors R1 and R4, an electrolytic capacitor C, adjustable resistors RP5 and RP6 and a humidity sensitive resistor RS which are connected by circuit board wiring, the sensing surface of the moisture-sensitive resistor RS is positioned outside a first opening at the front end of the shell 7, one end of a secondary winding of the transformer T is connected with one end of the moisture-sensitive resistor RS, the other end of the moisture-sensitive resistor RS is connected with the anode of a first diode VD1, one end of a first resistor R1 is connected, the cathode of the first diode VD1 is connected with the anode of a capacitor C, one end of a second resistor R4 is connected, the other end of the secondary winding of the transformer T is connected with the other end of a first resistor R1, the cathode of the capacitor C and one end of a first adjustable resistor RP6, the other end of the second resistor R4 is connected with one end of a second adjustable resistor RP5, the other end of the first adjustable resistor RP6 is connected with the other end of a second adjustable resistor RP5 and the anode of the second diode VD 5. The cabinet door closing detection circuit comprises an output sub-circuit, a reed switch GH, a first adjustable resistor RP7, a second adjustable resistor RP8, a circuit board, adjustable resistors RP7 and RP8 and a diode VD5, wherein the adjustable resistors RP7 and RP8 are connected through circuit board wiring, the reed switch GH is connected through a lead, one end of the reed switch GH is connected with one end of the resistor R5 and one end of the first adjustable resistor RP7, and the other end of the first adjustable resistor RP7 is connected with one end of the second adjustable resistor RP8 and the anode of the diode VD 5. The voltage detection circuit comprises diodes VD7 and VD2, a resistor R, an adjustable resistor RP1 and RP2 which are connected through circuit board wiring, wherein the cathode of the first diode VD7 is connected with one end of the second resistor R, the other end of the resistor R is connected with one end of the first adjustable resistor RP1, and the other end of the first adjustable resistor RP1 is connected with one end of the second adjustable resistor RP2 and the anode of the second diode VD 2. The temperature detection circuit comprises a thermistor RT, a resistor R2, adjustable resistors RP3, an RP4 and a diode VD3 which are connected through circuit board wiring, wherein a temperature sensing surface of the thermistor RT is positioned outside a second opening at the front end of the shell 7, one end of the thermistor RT is connected with one end of the resistor R2, the other end of the resistor R2 is connected with one end of the first adjustable resistor RP3, and the other end of the first adjustable resistor RP3 is connected with one end of the second adjustable resistor RP4 and the anode of the diode VD 3.

As shown in fig. 1 and 2, the control circuit includes adjustable resistors RP9 and RP10 connected by circuit board wiring, an operational amplifier integrated circuit A3 (model UA741), a resistor R6, a buzzer B, a PNP transistor Q1, and relays K1 and K2, a control power input terminal of a first relay K1 is connected to one end of the first adjustable resistor RP9, a pin 7 of a positive power input terminal of the operational amplifier integrated circuit A3, and an emitter of the PNP transistor Q1, the other end of the first adjustable resistor RP9 is connected to one end of a second adjustable resistor RP10, a pin 3 of a non-inverting input terminal of the operational amplifier integrated circuit A3, the other end of the second adjustable resistor RP10 is connected to a pin 4 of a negative power input terminal of the operational amplifier integrated circuit, a pin 6 of a negative power input terminal of the first relay K1, a negative power input terminal of the buzzer B, and a pin 2 of the second relay K2, an output terminal 6 of the operational amplifier integrated circuit A3 is connected to one end of the resistor R6, the other end of the resistor R6 is connected with the base electrode of a PNP triode Q1, the collector electrode of the PNP triode Q1 is connected with the positive power input end of a first relay K1, and the normally open contact end of the first relay K1 is connected with the positive power input end of a buzzer B and a second relay K2. The data sending circuit comprises a singlechip module A2 and a GPRS module A4 which are connected through circuit board wiring,

pins

1 and 2 of a power input end of the GPRS module A4 are respectively connected with

pins

1 and 2 of a power input end of the singlechip module A2, and a signal output end of the singlechip module A2 is connected with a signal input end of the GPRS module A4 through an RS485 data line. The arc detection circuit comprises a VD6, a resistor R3, adjustable resistors RP11 and RP12 and a photoresistor RL, wherein the light receiving surface of the photoresistor RL is positioned outside a third opening at the front end of the shell 7, one end of the photoresistor RL is connected with one end of a resistor R3, the other end of the resistor R3 is connected with one end of a first adjustable resistor RP11, and the other end of the first adjustable resistor RP11 is connected with one end of a second adjustable resistor RP12 and the anode of a diode VD 6. The power input ends 1 and 2 of the voltage-stabilized power supply A1 and two ends (the negative electrode of the capacitor C is connected with the 4 pins of the voltage-stabilized power supply A1) of a primary winding of a power input end transformer T of the humidity detection circuit are respectively connected with one phase line of a three-phase four-wire 380V power supply in the cabinet and a zero line (220V alternating current power supply) through wires, and the positive electrode of a power input end diode VD7 of the voltage detection circuit is connected with the phase line of the 220V alternating current power supply through wires. The power output end 3 and the pin 4 of a voltage-stabilized power supply A1, the other end of a thermistor RT and the other end of an adjustable resistor RP4 at the power input end of a temperature detection circuit, the other end of a reed switch GH and the other end of an adjustable resistor RP8 at the power input end of a cabinet door closing detection circuit, the positive power input end of a relay K1 and the negative power input end of a relay K2 at the power input end of a control circuit, the

pins

1 and 2 of a GPRS module A4 at the power input end of a data transmission circuit, and the other end of a photoresistor RL and the other end of the adjustable resistor RP12 at the power input end of an arc detection circuit are respectively connected through leads; the other end of the adjustable resistor RP2 of the voltage detection circuit is connected with a pin 4 of the regulated power supply A1; the other end of the signal output end resistor R4 of the humidity detection circuit, the other end of the signal output end resistor R3 of the arc discharge detection circuit, the other end of the signal output end resistor R2 of the temperature detection circuit, the other end of the signal output end resistor R5 of the cabinet door closing detection circuit, one end of the signal output end resistor R1 of the voltage detection circuit and the five

signal input ends

3, 4, 5, 7 and 6 of the data transmission circuit are respectively connected through leads, the cathode of a signal output end diode VD4 of the humidity detection circuit, the cathode of a signal output end diode VD6 of the arc discharge detection circuit, the cathode of a signal output end diode VD3 of the temperature detection circuit, the cathode of a signal output end diode VD5 of the cabinet door closing detection circuit, the cathode of a signal output end diode VD2 of the voltage detection circuit and the reverse input end pin 2 of a signal input end operational amplifier integrated circuit A3 of the control circuit are respectively connected through a lead; and a control signal end relay K2 control contact end and a normally open contact end of the control circuit are respectively connected with two contacts under an experiment button S of the leakage protector in the cabinet through leads. The main brake handle of the cabinet is positioned outside the front end of the cabinet door of the cabinet.

As shown in fig. 1 and 2, after a main power switch in the cabinet is turned on, a 220V ac power supply enters a power input end of a stabilized voltage supply and a humidity detection circuit, and after the stabilized voltage supply a1 is powered on, under the action of an internal circuit thereof,

pins

3 and 4 output a stable dc12V power supply to enter power input ends of a temperature detection circuit, a cabinet door closing detection circuit, a control circuit and a data transmission circuit. In the humidity detection circuit, the humidity sensitive resistor RS is subjected to different humidity in the cabinet, the resistance value can be changed, when the humidity is high, the resistance value is small, otherwise, the resistance value is high, therefore, the 12V power supply anode outputs different voltage signals along with the change of the different resistance values of the humidity sensitive resistor RS, the voltage signals are divided by the resistor R1 and subjected to half-wave rectification (capacitor C filtering) of the diode VD1, then the voltage signals are reduced by the resistor R4 and subjected to current limiting, the current signals enter the 3 pins of the first signal input end of the singlechip module A2, and meanwhile, after the dynamically changed analog voltage signals are divided by the adjustable resistors RP5 and RP6, the dynamically changed analog voltage signals enter the 2 pins of the reverse input end of the operational amplifier integrated circuit A3 through one-way conduction of the diode VD 4. In the temperature detection circuit, when the temperature in the cabinet changes, the resistance value of the thermistor RT can synchronously change, when the temperature is high, the resistance value is small, otherwise, the resistance value is large, therefore, the 12V power supply anode outputs different voltage signals along with the change of different resistance values of the thermistor RT, the voltage is reduced and the current is limited by the resistor R2, the voltage is reduced and the current is limited, the voltage is fed into the 5 pins of the third signal input end of the singlechip module A2, and simultaneously, the dynamically changed analog voltage signals are subjected to voltage division by the adjustable resistors RP3 and RP4 and then are conducted in a single direction by the diode VD3 to enter the 2 pins of the reverse input end of the operational amplifier integrated circuit A3. In the arc detection circuit, when a cabinet door is closed and no arc is generated in internal electrical equipment, the resistance value of a dark photoresistor RL of light in the cabinet is relatively large, and when the arc is generated in the electrical equipment, the resistance value of the bright photoresistor RL of light in the cabinet is relatively small, so that different voltage signals output by the anode of a 12V power supply along with the change of different resistance values of the photoresistor RL are subjected to voltage reduction and current limiting through a resistor R3 and enter a second signal input end 4 pin of a singlechip module A2, and meanwhile, after being subjected to voltage division through adjustable resistors RP11 and RP12, dynamically changed analog voltage signals are subjected to unidirectional conduction through a VD diode 6 and enter a reverse input end 2 pin of an operational amplifier integrated circuit A3.

As shown in fig. 1 and 2, in the voltage detection circuit, a power supply output by a 220V phase line is subjected to half-wave rectification by a diode VD7 and voltage reduction and current limitation by a resistor R, and then enters a fourth signal input terminal 6 pin of a single chip module a2, the higher the phase line power supply voltage is, the higher the voltage is, and the lower the voltage is, and meanwhile, the dynamically-changed analog voltage signal is subjected to voltage division by adjustable resistors RP1 and RP2, and then enters a reverse input terminal 2 pin of an operational amplifier integrated circuit A3 through unidirectional conduction by a diode VD 2. In the cabinet door closing detection circuit, after a cabinet door of a cabinet is closed, the magnetic acting force of a magnet CT acts on a reed pipe GH, the inside of the reed pipe GH is open, no voltage signal enters a fifth signal input end 7 pin of a single chip microcomputer module A2, when related personnel do not close the cabinet door due to negligence of various reasons, the magnetic acting force of the magnet CT does not act on the reed pipe GH any more, and an internal contact of the reed pipe GH is closed, so that the voltage signal is reduced in voltage and limited by a resistor R5 and enters a7 pin of a single chip microcomputer module A2, and meanwhile, after the analog voltage signal is divided by adjustable resistors RP7 and RP8, the analog voltage signal is conducted in a one-way through a diode VD5 and enters a reverse input end 2 pin of an operational amplifier integrated circuit A3. The humidity detection circuit detects humidity data in the cabinet, the temperature detection circuit detects temperature data in the cabinet, the cabinet door closing detection circuit detects whether a cabinet door is closed, the voltage detection circuit detects input voltage data and whether arc discharge data is generated in the arc discharge detection circuit cabinet, after the various output analog voltage signal data enter the single chip microcomputer module A2, the single chip microcomputer module A2 converts analog voltage signals into digital signals under the action of the internal circuit of the single chip microcomputer module A2 and outputs the digital signals to the signal input end of the GPRS module A4, the GPRS module A4 sends out five dynamically-changed digital signals through a wireless mobile network under the action of the internal circuit of the single chip microcomputer module A2, and after related personnel mobile phones or PC computers connected with the GPRS module A4 at the far end receive the digital signals, various field data changes are displayed through a five-way waveform diagram or a five-way digital form (the waveform diagram represents high field humidity in the cabinet, the arc discharge of the cabinet, the temperature of the cabinet, the cabinet door closing detection circuit detects whether the cabinet door is closed, the voltage detection circuit detects the voltage data, the voltage detection circuit detects the voltage data of the voltage detection circuit, the output various analog voltage signal data of the various kinds of the output various kinds, the various kinds of the various kinds, The temperature is high, the cabinet door is not closed, the voltage is high, and the generated arc light is large, on the contrary, the field humidity in the cabinet is small, the temperature is low, the cabinet door is closed (the straight line or the number of the oscillogram is zero), the voltage is low, and the generated arc light is small or no arc light is generated (the straight line or the number of the oscillogram is zero)), so that a remote manager can master various field data in real time. It should be noted that, the remote smart phone or the PC receives the relevant data signal through its application, and displays the received data signal in the form of a waveform diagram or a number, etc. as a mature data receiving and transmitting technology of the internet of things in the prior art, the present application only uses the mature data technology of the internet of things to realize the display of multiple data after the remote transmission, that is, the remote smart phone or the PC receives the data and displays the data which is not within the protection object of the present application.

In the control circuit shown in fig. 1 and 2, a 12V power supply is divided by adjustable resistors RP9 and RP10 to supply power to a pin 3 (the voltage is 6V) of a non-inverting input terminal of an operational amplifier integrated circuit A3; in practical situations, when the field voltage signal is lower than a limit value (for example, lower than 235V), the voltage of the pin 2 at the reverse input end of the operational amplifier integrated circuit A3 is lower than the voltage of the pin 3 at the non-inverting input end after being divided by the adjustable resistors RP1 and RP2, and the pin 6 of the operational amplifier integrated circuit A3 outputs a high level; when the field humidity is low (for example, less than seventy-five percent), the voltage is divided by adjustable resistors RP5 and RP6, the voltage of a pin 2 at the reverse input end of the operational amplifier integrated circuit A3 is lower than the voltage of a pin 3 at the non-inverting input end, and a pin 6 of the operational amplifier integrated circuit A3 outputs a high level; after the on-site cabinet door is closed, the voltage of a pin 2 at the reverse input end of the operational amplifier integrated circuit A3 is lower than the voltage of a pin 3 at the non-inverting input end after the voltage of the operational amplifier integrated circuit A3 is divided by adjustable resistors RP9 and RP10, and a pin 6 of the operational amplifier integrated circuit A3 outputs a high level; when the field temperature is lower than a certain temperature (for example, lower than 45 ℃), the voltage is divided by the adjustable resistors RP3 and RP4 and then enters the operational amplifier integrated circuit A3, the voltage of the pin 2 at the reverse input end is lower than the voltage of the pin 3 at the non-inverting input end, and the pin 6 of the operational amplifier integrated circuit A3 outputs a high level; when no arc is drawn on site, the voltage of a pin 2 at the reverse input end of the operational amplifier integrated circuit A3 is lower than the voltage of a pin 3 at the non-inverting input end after the voltage is divided by the adjustable resistors RP11 and RP12, and a pin 6 of the operational amplifier integrated circuit A3 outputs high level. In practical situations, when the field voltage signal is higher than a limit value (for example, higher than 235V), the voltage is divided by the adjustable resistors RP1 and RP2, and then the voltage is unidirectionally conducted by the diode VD2 to enter the reverse input terminal of the operational amplifier integrated circuit A3, where the voltage is higher than the voltage of the 3-pin non-inverting input terminal, and the 6-pin operational amplifier integrated circuit A3 outputs a low level; when the field humidity is higher (for example, higher than seventy-five percent), the voltage is divided by the adjustable resistors RP5 and RP6, and then the voltage enters the reverse input end of the operational amplifier integrated circuit A3 through the diode VD4 in a one-way conduction mode, the voltage is higher than the voltage of the 3 pins of the non-inverting input end, and the 6 pins of the operational amplifier integrated circuit A3 output low level; when the on-site cabinet door is not closed, the voltage of the on-site cabinet door is divided by adjustable resistors RP9 and RP10, and then the on-site cabinet door is conducted in a single direction by a diode VD5 to enter an operational amplifier integrated circuit A3, wherein the voltage of the reverse input end is higher than the voltage of a pin 3 of the in-phase input end, and a pin 6 of the operational amplifier integrated circuit A3 outputs a low level; when the field temperature is higher than a certain temperature (for example, lower than 45 ℃), after voltage division is carried out on the field temperature through the adjustable resistors RP3 and RP4, the voltage enters the reverse input end of the operational amplifier integrated circuit A3 through unidirectional conduction of the diode VD3 and is higher than the voltage of the 3 pins of the non-inverting input end, and the 6 pins of the operational amplifier integrated circuit A3 output low level; when the arc is pulled on site, the voltage is divided by the adjustable resistors RP11 and RP12 and then is conducted in a single direction through the diode VD6, the voltage of the reverse input end of the operational amplifier integrated circuit A3 is higher than the voltage of the 3 pins of the non-inverting input end, and the 6 pins of the operational amplifier integrated circuit A3 output low level. Through the above, as long as no matter the temperature exceeds the standard in the cabinet, or the voltage exceeds the standard, the humidity exceeds the standard, the cabinet door is not closed, any condition of arcing can be generated, and the 2-pin voltage of the operational amplifier integrated circuit A3 is higher than the 3-pin voltage, so the 6-pin output low level of the operational amplifier integrated circuit A3 is subjected to voltage reduction and current limiting through the resistor R6 and enters the base of the PNP triode Q1, the PNP triode Q1 is conducted to the collector and output high level and enters the positive power input end of the relay K1, the relay K1 is electrified to attract the control power input end and the normally open contact end of the relay K2 to be closed, and then the control contact end and the normally open contact end of the relay K2 are electrified to attract the normally open contact end to be closed (meanwhile, the buzzer B is electrified to prompt people nearby the cabinet, and certain data in the cabinet exceed the standard). Because the relay K2 control contact end and normally open contact end are connected with the two contacts under the experiment button S of the leakage protector in the cabinet through the wires, the protector can trip after any data in the cabinet exceeds the standard, and then the main power switch in the cabinet is closed. Through the combined action of all the circuits and mechanisms, the novel humidity detection circuit, the temperature detection circuit, the cabinet door closing detection circuit, the voltage detection circuit and the arc-drawing detection circuit can respectively detect the humidity, the temperature and whether the cabinet door is closed and voltage data and whether the electric equipment generates the arc-drawing phenomenon, various data are remotely transmitted through the data transmission circuit, a remote manager can intuitively know various specific data on site through a mobile phone or a PC (personal computer) based on the existing mature internet of things data receiving, sending and displaying technology, convenience is brought to relevant personnel, and the relevant personnel can arrive at the site to handle the data at the first time when necessary; when temperature, humidity, voltage and arc discharge data exceed the limit, and the cabinet door is not closed, the control circuit can close the main power switch at the first time, so that potential safety hazards are reduced, and safe power supply is guaranteed as far as possible.

In fig. 2, the PNP transistor Q1 model is 9012; relays K2, K1 are DC12V relays; the buzzer B is an active continuous sound buzzer alarm finished product with the model SF 12V; the thermistor RT model is a negative temperature coefficient thermistor of NTC 103D; the capacitor C is an electrolytic capacitor with the model number of 47. mu.F/25V; the models of the diodes VD1, VD3, VD4, VD4, VD5, VD6 and VD7 are 1N 4007; the model of the humidity sensitive resistor RS is MS01-A (alternating current is adopted for power supply, and the detection effect is mainly prevented from being influenced due to direct current polarization); the resistances of the resistors R, R1, R2, R3, R4, R5 and R6 are 100K, 1M, 150 omega, 40K, 1K, 300 omega and 1K respectively; the photoresistor RL model is MD 45; adjustable resistances RP1 (adjusted to about 4.7K), RP2 (adjusted to about 9.4K), RP3 (adjusted to about 1.1K) \\ RP4 (adjusted to about 2.2K), RP5 (adjusted to about 0.7K), RP6 (adjusted to about 1.4K), RP7 (adjusted to about 4.7K), RP8 (adjusted to about 5.2K), RP9 (adjusted to about 4.7K), RP10 (adjusted to about 9.4K), RP11 (adjusted to about 1K), RP12 (adjusted to about 2K) model numbers are 10K, respectively; the transformer T is a power transformer for converting 220V alternating current into 14V and 3W alternating current; the reed switch GH is a normally closed contact reed switch of the glass shell; magnet CT is a permanent magnet; GPRS module a4 model ZLAN 8100; the model of the main control chip of the singlechip module A2 is STC12C5A60S 2.

While there have been shown and described what are at present considered to be the fundamental and essential features of the utility model, together with the advantages thereof, it will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms of implementation without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, the embodiments do not include only one independent technical solution, and such description is only for clarity, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. The multi-data acquisition device for the cabinet comprises a stabilized voltage power supply and is characterized by further comprising a humidity detection circuit, a temperature detection circuit, a cabinet door closing detection circuit, a voltage detection circuit, a control circuit, a data sending circuit and an arc detection circuit, wherein the cabinet door closing detection circuit comprises a magnet, a reed switch and an output sub circuit, and the magnet and the reed switch are respectively arranged on one side of a cabinet door and one side of a cabinet body of the cabinet; the humidity detection circuit, the temperature detection circuit, the output sub-circuit, the voltage detection circuit, the control circuit, the data transmission circuit and the arc detection circuit are arranged in an element box in the cabinet; the signal output ends of the humidity detection circuit, the temperature detection circuit, the cabinet door closing detection circuit, the voltage detection circuit and the arc discharge detection circuit are respectively and electrically connected with the multi-path signal input ends of the data transmission circuit and the signal input end of the control circuit; and the control signal end of the control circuit is electrically connected with the lower two contacts of the experiment button of the leakage protector in the cabinet respectively.

2. The multiple data collection device for the cabinet as claimed in claim 1, wherein the humidity detection circuit includes a transformer, a diode, a resistor, an electrolytic capacitor, an adjustable resistor, and a humidity sensitive resistor electrically connected to each other, one end of a secondary winding of the transformer is connected to one end of the humidity sensitive resistor, one end of a first diode, one end of the first resistor, a cathode of the first diode is connected to one end of the capacitor, one end of a second resistor, the other end of the secondary winding of the transformer is connected to the other end of the first resistor, the cathode of the capacitor, and one end of the first adjustable resistor, the other end of the second resistor is connected to one end of a second adjustable resistor, and the other end of the first adjustable resistor is connected to the other end of the second adjustable resistor, and the anode of the second diode.

3. The multiple data collection device for cabinets of claim 1, wherein the output sub-circuit of the cabinet door closing detection circuit comprises an adjustable resistor and a diode electrically connected to the reed switch, one end of the reed switch is connected to one end of the resistor and one end of the first adjustable resistor, and the other end of the first adjustable resistor is connected to one end of the second adjustable resistor and the anode of the diode.

4. The multiple data collection device for a rack of claim 1, wherein the voltage detection circuit comprises a diode and a resistor, an adjustable resistor electrically connected to the diode, the first diode having a negative terminal connected to one terminal of the resistor, the other terminal of the resistor connected to one terminal of the first adjustable resistor, the other terminal of the first adjustable resistor connected to one terminal of the second adjustable resistor and a positive terminal of the second diode.

5. The multiple data collection device for a cabinet of claim 1, wherein the temperature detection circuit comprises a thermistor, a resistor, an adjustable resistor, and a diode electrically connected, one end of the thermistor is connected to one end of the resistor, the other end of the resistor is connected to one end of the first adjustable resistor, and the other end of the first adjustable resistor is connected to one end of the second adjustable resistor and the anode of the diode.

6. The multiple data collection device for a cabinet according to claim 1, wherein the control circuit includes an electrically connected adjustable resistor, an operational amplifier integrated circuit, a resistor, a buzzer, a PNP transistor, and a relay, the first relay controls the power input and the positive power input, one end of the first adjustable resistor, the positive power input of the operational amplifier integrated circuit, and an emitter of the PNP transistor, the other end of the first adjustable resistor is connected to one end of the second adjustable resistor, the non-inverting input of the operational amplifier integrated circuit, the other end of the second adjustable resistor is connected to the negative power input of the operational amplifier integrated circuit, the negative power input of the first relay, the negative power input of the buzzer, and the negative power input of the second relay, the output of the operational amplifier integrated circuit is connected to one end of the resistor, the other end of the resistor is connected to a base of the PNP transistor, the collector electrode of the PNP triode is connected with the positive power input end of the first relay, and the normally open contact end of the first relay is connected with the buzzer and the positive power input end of the second relay.

7. The multiple data collection device for a cabinet of claim 1, wherein the arcing detection circuit includes a diode and a resistor, an adjustable resistor, and a photo resistor electrically connected to one end of the resistor, the other end of the resistor is connected to one end of the first adjustable resistor, and the other end of the first adjustable resistor is connected to one end of the second adjustable resistor and the anode of the diode.