KR102366221B1 - Self-powered complex detection sensor and method using electromagnetic induction method - Google Patents

Abstract

The present invention relates to a self-powered complex detection sensor using an electromagnetic induction method, which comprises: a current detection unit connected to an electric cable to detect a primary-side current flowing through the electric cable; a self-generation unit coupled to first to third current detection units of the current detection unit and receiving the current induced to the secondary side of the first to third current detection units to generate power; a current RMS measurement unit measuring an effective value of a secondary-side current flowing through the electric cable; an MCU unit operate by receiving the power generated by the self-generation unit and including a plurality of measurement units to detect a plurality of parameters with a time difference; and a sensing resistance unit installed at the front end of the current RMS measurement unit to measure the effective value of the secondary current flowing through the electric cable together with the RMS measurement unit and controlling operation of the self-generation unit. According to the present invention, a current measurement unit, a temperature measurement unit, and a circuit breaker contact measurement unit are operated with a time difference, thereby providing effects of measuring current and temperature with low-power power self-generated through an electromagnetic induction method and checking the state of a circuit breaker contact.

Description

Self-powered complex detection sensor and method using electromagnetic induction method

The present invention relates to a self-generation complex detection sensor and method using an electromagnetic induction method, and more particularly, an electromagnetic induction method capable of monitoring complex factors such as current, temperature, and circuit breaker status without power in an AC power system. It relates to a self-powered complex detection sensor and method used.

Currently, there are various measuring devices for fire prevention or facility management in industrial sites. For the safety and smooth operation of facilities, a monitoring device that monitors and detects anomalies is required, and its usage is increasing.

Conventional monitoring devices mainly used a wired power supply method and a wireless power supply method using a battery to supply power. there is.

In order to solve the above problems, a wireless sensor through self-generation has been developed, but there is another problem that only a small-scale power conversion is possible, and an operation time is long or only a single element can be measured due to a technical problem.

In detail, conventional self-generation products have an inefficient power consumption form in which other devices that are not driven when one device is driven also operate in a always-on state, which increases the operating time. There is a limit to its application to industrial sites such as ESS and ESS.

Since conventional self-generation products can only convert small-scale power, if a sudden voltage drop occurs due to inrush current when driving a device in an environment with little energy to be collected, it cannot maintain the voltage to drive the device and turn ON/OFF There is a problem in that normal operation is difficult by repeating the shape.

Therefore, there is a need for a monitoring technology that can shorten the operation time, compensate for voltage drop, and measure various elements even with low power.

Republic of Korea Patent Publication No. 10-2205321 (2021.01.14)

In order to solve the above problems and satisfy the needs, the present invention compensates for the inrush voltage caused by the driving voltage and expands the energy use area to improve the operation reliability, and converts the device to a stop state except for devices that are actually operating during operation. An object of the present invention is to provide a self-powered complex detection sensor and method using an electromagnetic induction method that can reduce energy consumption and reduce the time required for 1 cycle from device operation start to data transmission, thereby securing economic feasibility and reliability compared to existing sensors. .

Self-generation complex detection sensor using an electromagnetic induction method according to the present invention for achieving the above object is connected to the wire cable current detection unit for detecting the primary-side current flowing in the wire cable; a self-generation unit coupled to the first to third current detecting units of the current detecting unit and generating power by receiving the current induced to the secondary side of the first to third current detecting units; a current RMS measuring unit for measuring an effective value of a secondary current flowing through the wire cable; an MCU unit configured to operate by receiving power generated by the self-generation unit and configured with a plurality of measurement units to detect a plurality of parameters with a time difference; and a sensing resistor installed at the front end of the current RMS measuring unit to measure the effective value of the secondary current flowing through the wire and cable like the RMS measuring unit and at the same time control the operation of the self-generation unit.

As another embodiment, the self-generation complex detection method using the electromagnetic induction method according to the present invention for achieving the above object (a) when the current starts to flow in the line to which the self-generation unit is connected, the operation of the sensor through energy collection collecting the power required for it; (b) the self-generation unit checks the operating voltage at which the circuit of the MCU unit can operate at a predetermined period and transmits the collected generated voltage to the MCU unit; (c) measuring the current by driving the current measuring unit with a time difference according to the operation sequence of the MCU unit receiving the generated voltage from the self-generating unit; (d) measuring the temperature by the MCU unit providing the generated voltage to the temperature measuring unit; and (e) transmitting the data information measured so far by providing the generated voltage by the MCU to the data processing unit.

Self-generation complex detection sensor and method using an electromagnetic induction method according to the present invention by driving the current measuring unit, the temperature measuring unit, and the data processing unit with a time difference, the current, temperature and It is possible to check the state of the contact point of the circuit breaker, and by transmitting data wirelessly, there is an effect that the state can be checked from a distance.

1 is a block diagram of a self-powered complex detection sensor using an electromagnetic induction method according to the present invention.
2 is a flowchart of a self-generation complex detection method using an electromagnetic induction method according to the present invention.
3 is a detailed flowchart of the self-generation complex detection method using the electromagnetic induction method according to the present invention.

The terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor may properly define the concept of the term in order to best describe his invention. Based on the principle that there is, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention and do not represent all the technical spirit of the present invention, so they can be substituted at the time of the present application It should be understood that various equivalents and modifications may exist.

Hereinafter, a self-generation complex detection sensor and method using an electromagnetic induction method according to the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of a self-powered complex detection sensor using an electromagnetic induction method according to the present invention.

As shown in FIG. 1 , the self-generation complex detection sensor 100 using the electromagnetic induction method according to the present invention includes a current detection unit 110 , a self-generation unit 120 , a current RMS measurement unit 130 , and an MCU unit 140 . ), and a sensing resistor 160 .

The current detection unit 110 includes first to third current detection units 111 , 112 , 113 connected to a single-phase or three-phase electric wire cable to detect a primary-side current flowing in the electric wire cable.

The self-generation unit 120 is coupled to the first to third current detection units 111, 112, and 113, and the current induced to the secondary side of the first to third current detection units 111, 112, 113. received to generate power.

Meanwhile, the current RMS measuring unit 130 is connected to the first to third current detecting units 111 , 112 , and 113 to measure the effective value (rms) of the secondary-side current flowing through the wire cable.

The sensing resistor 160 is installed at the front end of the RMS measuring unit 130 to measure the effective value (rms) of the secondary current flowing through the wire and cable like the corresponding RMS measuring unit 130 and at the same time the self-generation Controls the operation of the unit 120 .

The MCU unit 140 operates by receiving the power generated by the self-generation unit 120 , and receives and analyzes the current detected from the current RMS measuring unit 130 and the sensing resistor unit 160 .

The wireless communication transmitter 150 receives data on current, temperature, and circuit breaker contacts from the data processing unit 145 and includes a wired/wireless communication unit for interworking with an external upper management server and a gateway for generating the received AC current information (not shown) is included.

In the present invention, the first to third current detection units 111, 112, and 113 may be connected to a wireless current sensor or clamp CT having a single external shape integrating various circuit units in the form of a clamp CT and a circuit unit with wires and connectors from the outside. As a wireless current sensor having two external appearances, it is configured to be connected to the wire cable.

In addition, the self-generation unit 120 includes a first rectifying unit 121 for rectifying the secondary-side current of the first to third current detecting units 111 , 112 , and 113 , and rectifying through the first rectifying unit 121 . and a DC/DC converter unit 125 for receiving the current and generating necessary power.

At this time, the self-generation unit 120 includes an input power storage unit 124 for storing the current rectified by the first rectifying unit 121 between the first rectifying unit 121 and the DC/DC converter unit 125 . include more

In addition, an output power storage unit 170 is formed between the self-generation unit 120 and the MCU unit 140 , and the output power storage unit 170 is generated by the DC/DC converter unit 125 . Power is stored and supplied to the MCU unit 140 .

On the other hand, the self-generation complex detection sensor using the electromagnetic induction method according to the present invention is the second and third rectifying units 122 and 123 for rectifying the secondary-side current of the second current detection unit 112 and the third current detection unit 113 . ) is included.

The second and third rectifying units 122 and 123 are configured in the same manner as the first rectifying unit 121 and serve to supply the rectified current to the self-generating unit 120 .

The first to third current detection units 111, 112, and 113 are separate circuit units that are switched and operated only for a specific time by the measurement control unit 146 to remove current distortion caused by the self-generation unit 120 ( not shown) are included.

The MCU unit 140 includes current information and count information measured from the first to third current detection units 111 , 112 , 113 , temperature information measured from the temperature measurement unit 143 , and a breaker contact state measured from the circuit breaker. Based on the information, the number of times the wireless communication transmitter 150 transmits data wirelessly is calculated as the primary-side effective current value (RMS) of the power cable to which the first to third current detectors 111, 112, and 113 are connected. Data is packetized by calculating the number of operations of the temperature measuring unit 143 , the breaker contact measuring unit 144 , and the MCU unit 140 .

The packetized data is transmitted to the gateway through the wireless communication transmitter 150 . At this time, the data transmission method is a one-way Tx method, and a low-power method through energy collection such as a beacon using Bluetooth and one-way RF is used.

That is, it is possible to reduce power consumption due to low-power driving by removing power consumption in the Rx standby state for bidirectional implementation and transmitting in a unidirectional Tx method.

Meanwhile, although it has been described that the MCU unit 140 and the wireless communication transmitter 150 are configured as separate types, the present invention is not limited thereto and may be configured as a single package.

In addition, the self-generation unit 120 is configured with a first rectifier 121 that rectifies the secondary-side current of the first to third current detection units 111 , 112 , and 113 to supply power required for circuit operation.

In this case, the self-generation unit 120 may be configured as a single package to achieve miniaturization.

The gateway, not shown, operates by receiving external AC power, and acquires current RMS value and temperature value, breaker contact monitoring value, and wireless communication transmission count value in one direction from a remote wireless current sensor through the wireless communication transmitter 150 . , the current RMS value and the received count value are used to calculate current data and generate data packets.

The gateway constitutes an energy management system and data packet transmission/reception through wired/wireless communication with a higher-level server system (not shown).

The MCU unit 140 includes a self-generation unit 120 through the secondary-side current of the first to third current detection units 111, 112, and 113 and the first to third current detection units 111, 112, and 113. is operated at regular intervals.

The MCU unit 140 operates when sufficient energy is stored through the self-generation unit 120 between the DC/DC converter unit 125 and the input power storage unit 124 or the output power storage unit ( A switching unit (not shown) may be additionally configured between 170 ) and the MCU unit 140 .

The switching unit is turned OFF so that the MCU unit 140 does not operate when a certain power is not generated, and is turned ON when sufficient energy is generated and stored in the input power storage unit 124 and the output power storage unit 170 . The MCU unit 140 is operated.

The MCU unit 140 includes a power supply unit 141 , a current measurement unit 142 , a temperature measurement unit 143 , a circuit breaker contact measurement unit 144 , a data processing unit 145 , and a measurement control unit 146 . there is.

The power supply unit 141 receives the power generated from the self-generation unit 220 and supplies power required to the MCU unit 140 and the wireless communication transmitter 150 .

In particular, the power supply unit 141 is switched only when it is time to proceed with the operation, and there is a time difference between the current measuring unit 142, the temperature measuring unit 143, and the breaker contact measuring unit 144 of the MCU unit 140. supply power.

The data processing unit 145 receives the power required from the self-generation unit 120 and receives the current information detected from the first to third current detection units 111 , 112 , 113 to perform calculation or the wireless communication transmission unit ( 150) is controlled.

The measurement control unit 146 calculates the primary-side current RMS value of the power cable to which the first to third current detection units 111, 112, and 113 are connected and the number of operations of the MCU unit 140 to packetize data or , to drive the switching circuit unit for removing current distortion caused by the self-generation unit 120 .

The self-generation unit 120 rectifies the secondary-side currents of the first to third current detection units 111 , 112 , and 113 with the first rectifier 121 and stores the rectified current in the input power storage unit 124 , and the corresponding input When Vin stored in the power storage unit 124 accumulates energy up to a specific voltage, the DC/DC converter unit 125 is activated to generate an output voltage at which the MCU unit 140 and the wireless communication transmitter 150 can operate. to store the power in the output power storage unit 170 and then supply it.

The current measuring unit 142 is connected to a single-phase or three-phase wire cable to be measured as the self-generation unit 120 generates an output voltage capable of operating the MCU unit 140 and supplies power to the corresponding Measure the current flowing through the wire cable.

As the temperature measuring unit 143 supplies power by generating an output voltage at which the self-generation unit 120 can operate the MCU unit 140, the temperature measurement unit 143 measures the temperature value in a contact or non-contact manner at a point to be measured. measure

The circuit breaker contact measurement unit 144 included in the MCU unit 140 generates an output voltage that the MCU unit 140 can operate and supplies power, so it is attached to the breaker contact to be measured and the circuit breaker monitor the status

A detection method by a self-powered composite detection sensor using an electromagnetic induction method having the configuration as described above will be described in detail with reference to FIGS. 2 and 3 .

The self-generation unit 120 of the self-generation complex detection sensor using the electromagnetic induction method according to the present invention performs a step of collecting power required for the operation of the sensor through energy collection when a current starts to flow in the connected line ( S100).

That is, the self-generation unit 120 receives the secondary-side current of the current detection unit 110 to generate and collect power.

The self-generation unit 120 checks the operating voltage at which the circuit of the MCU unit 140 can operate at a certain period and transmits the collected generated voltage to the MCU unit 140 (S200).

The MCU unit 140 receiving the generated voltage from the self-generation unit 120 drives the current measuring unit 142 with a time difference according to the operation sequence to measure the current (S300).

To describe the S300 in more detail, in the step S200, the MCU unit 140 compares the generated voltage generated and collected by the self-generation unit 120 and the size of the operating voltage (S310).

In step S310 , if the generated voltage collected by power generation is less than the operating voltage of the MCU unit 140 , the MCU unit 140 repeats step S100 to collect energy again.

Conversely, when the generated voltage collected as a result of the comparison in step S310 is greater than the operating voltage of the MCU unit 140, the MCU unit 140 supplies power to the current measurement unit 142 of the MCU unit 140 in order. performing the step of supplying (S320).

When power is supplied from the self-generation unit 120, the MCU unit 140 starts the sensing operation by driving the current measuring unit 142, the temperature measuring unit 143, or the breaker contact measuring unit 144. .

In step S320, the MCU unit 140 maintains all sensing elements, such as the current measuring unit 142, the temperature measuring unit 143, and the breaker contact measuring unit 144, in an OFF state even when power is supplied, Only when it is time to proceed with the operation, it is switched to the ON state through a switching operation and operated.

When power is supplied to the MCU unit 140 in step S320, the current measuring unit 142 measures the current flowing in the single-phase or three-phase wire cable (S330).

In particular, the current measurement unit 142 measures the R, S, and T phases once in sequence in the case of three phases, but the self-generation unit 120 is configured to measure the current even when the current measurement unit 142 measures the current for each phase. Every time one phase measurement is finished, the operating voltage is checked.

At this time, the self-generation unit 120 that generates power by receiving the secondary-side current of the first to third current detection units 111 , 112 , 113 of each phase is the current is measured by the current measurement unit 142 . In addition to the phase, energy collection continues through the remaining phases.

As described above, when the self-generation unit 120 continues to collect energy through the remaining phases other than the phase in which the current is measured by the current measurement unit 142 , the collected energy drives the MCU unit 140 . This is to reduce the waiting time until the required value is obtained, and to reduce the time required for the overall operation to enable real-time measurement.

As described above, when the current measurement by the current measurement unit 142 is completed up to three-phase, the MCU unit 140 cuts off the power supply by the power supply unit 141 to turn off the current measurement unit 142 circuit. to perform the step (S340).

According to the following procedure, the MCU unit 140 provides the generated voltage to the temperature measurement unit 143 to measure the temperature (S400).

That is, when the current measurement by the current measurement unit 142 is completed, the MCU unit 140 performs the next step of measuring the temperature by the temperature measurement unit 143 .

To describe the step S400 in more detail, the MCU unit 140 performs a step of comparing the magnitude of the generated voltage generated and collected by the self-generation unit 120 and the operating voltage of the MCU unit 140 . (S410).

In step S410 , if the generated voltage generated and collected is less than the operating voltage of the MCU unit 140 , the self-generation unit 120 repeats step S100 to collect energy again.

Conversely, when the voltage collected in step S410 of the self-generation unit 120 is greater than the operating voltage of the MCU unit 140, the step of supplying power to the temperature measuring unit 143 of the MCU unit 140 is performed. perform (S420).

The temperature measuring unit 143 supplied with power in step S420 performs a step of measuring the temperature (S430).

When the temperature measurement is completed in step S430, the MCU unit 140 cuts off the power supply by the power supply unit 141 to turn off the temperature measurement unit 143 circuit (S440).

Finally, the MCU unit 140 provides the generated voltage to the data processing unit 145 to transmit the measured data (S500).

That is, when the temperature measurement by the temperature measurement unit 143 is completed, the MCU unit 140 transmits all measured data to the upper management server.

To describe the step S500 in more detail, the MCU unit 140 performs a step of comparing the magnitude of the generated voltage generated and collected by the self-generation unit 120 and the operating voltage of the data processing unit 145 . (S510)

In step S510, when the generated voltage collected by the self-generation unit 120 is lower than the generated voltage of the data processing unit 145, the above step S100 is repeated to collect energy again.

Conversely, when the generated voltage collected in step S510 is greater than the operating voltage of the MCU unit 140, the self-generation unit 120 supplies power to the data processing unit 145 (S520).

The data processing unit 145 supplied with power in step S520 performs a step of transmitting the measured data to the upper management server (S530).

When the data transmission is completed in step S530, the MCU unit 140 cuts off the power supply by the power supply unit 141 to turn off the data processing unit 145 circuit (S540)

In the above, the technical idea of the present invention has been described along with the accompanying drawings, but the preferred embodiment of the present invention is exemplarily described and does not limit the present invention. In addition, it is clear that various modifications and imitations are possible without departing from the scope of the technical spirit of the present invention by anyone having ordinary knowledge in the technical field to which the present invention pertains.

110: current detection unit
111, 112, 113: first to third current detection units
120: self-generation unit
121, 122, 123: first to third rectifying units
124: input power storage unit
125: DC/DC converter
130: current RMS measuring unit
140: MCU unit
141: power supply
142: current measuring unit
143: temperature measurement unit
144: breaker contact measurement part
145: data processing unit
146: measurement control unit
150: wireless communication transmitter
160: sensing resistor unit
170: output power storage unit

Claims (8)

a current detection unit connected to the electric wire cable to detect a primary-side current flowing in the electric wire cable;
a self-generation unit coupled to the first to third current detecting units of the current detecting unit and generating power by receiving the current induced to the secondary side of the first to third current detecting units;
a current RMS measuring unit for measuring an effective value of a secondary current flowing through the wire cable;
an MCU unit configured to operate by receiving power generated by the self-generation unit and configured with a plurality of measurement units to detect a plurality of parameters of various facilities in which sensors are installed with a time difference;
A sensing resistor installed at the front end of the current RMS measuring unit to measure the effective value of the secondary current flowing through the wire cable together with the RMS measuring unit and at the same time to control the operation of the self-generation unit;
The MCU is
a power supply unit for receiving power generated from the self-generation unit and supplying power required to the corresponding MCU unit;
a current measuring unit for measuring a current flowing in a single-phase or three-phase wire cable to be measured as the power supply unit that receives the generated voltage generated by the self-generation unit transmits power;
a temperature measuring unit receiving the generated voltage from the power supply with a time difference after the current measuring unit and measuring a temperature of a point to be measured;
a breaker contact measuring unit receiving power from the power supply unit with a time difference after the temperature measuring unit and checking a state of a breaker contact connected to the electric wire and cable;
a data processing unit for receiving the power required from the self-generation unit, receiving the current information, temperature information, and breaker contact information detected from the first to third current detection units, and calculating and controlling the wireless communication transmitter; and
Measurement of operating the switching circuit unit for packetizing data by calculating the RMS value of the primary side current of the power cable to which the first to third current detection units are connected and the number of operations of the MCU unit, or for removing current distortion caused by the self-generation unit A self-powered complex detection sensor using an electromagnetic induction method, comprising: a control unit.
delete The method of claim 1,
The self-generation unit
While generating power by receiving the current from the secondary side of the first to third current detection units of each phase of the three phases, while measuring the current for any one of the three phases, energy collection continues through the remaining phases to generate power Self-generation complex detection sensor using an electromagnetic induction method, characterized in that.
In the detection method by the self-generation complex detection sensor using the electromagnetic induction method installed in various facilities for facility management,
(a) when the current starts to flow in the line to which the self-generation unit is connected, collecting power required for the operation of the sensor through energy collection;
(b) the self-generation unit checks the operating voltage at which the circuit of the MCU unit can operate at a certain period and transmits the generation voltage composed of the power collected in step (a) to the MCU unit;
(c) measuring the current of various facilities by driving the current measuring unit with a time difference according to the operation sequence of the MCU unit receiving the generated voltage from the self-generating unit;
(d) measuring the temperature of various facilities by providing the power generation voltage to the temperature measuring unit by the MCU; and
(e) the MCU providing the generated voltage to the data processing unit and transmitting the data information measured so far to the upper management server; including;
Step (c) is
(c-1) comparing the magnitude of the generated voltage and the operating voltage generated and collected by the MCU unit by the self-generation unit;
(c-2) if the generated voltage collected by the MCU unit as a result of the comparison in step (c-1) is greater than the operating voltage, supplying power to the current measuring unit in order;
(c-3) measuring the current flowing in the single-phase or three-phase wire cable by the current measuring unit; and
(c-4) the power supply unit of the MCU unit cut off the power supply to turn off the current measuring unit circuit; including;
Step (d) is
(d-1) after completion of the current measurement by the current measuring unit, comparing the magnitude of the generated voltage generated and collected by the MCU unit and the operating voltage by the self-generation unit;
(d-2) if the generated voltage collected by the MCU unit as a result of the comparison in step (d-1) is greater than the operating voltage, supplying power to the temperature measuring unit in order;
(d-3) measuring a temperature value in contact or non-contact at a point to be measured by the temperature measuring unit; and
(d-4) the power supply unit of the MCU unit cut off the power supply to turn off the temperature measuring unit circuit; self-generation complex detection method using the electromagnetic induction method comprising: a.
delete delete 5. The method of claim 4,
Step (e) is
(e-1) after the temperature measurement of the temperature measuring unit is completed, the MCU unit comparing the generated voltage generated by the self-generating unit and collected and the magnitude of the operating voltage;
(e-2) if the generated voltage collected by the MCU unit as a result of the comparison in step (e-1) is greater than the operating voltage, supplying power to the data processing unit in order;
(e-3) transmitting, by the data processing unit, the data values measured so far to an upper management server; and
(e-4) the step of turning off the circuit breaker contact measurement unit circuit by the power supply unit of the MCU unit cutting off the power supply;
8. The method of claim 7,
The self-generation unit
While generating power by receiving the current from the secondary side of the first to third current detection units of each phase of the three phases, while the current for any one of the three phases is measured, energy is continuously collected through the remaining phases to generate power Self-generation complex detection method using an electromagnetic induction method, characterized in that.

Images