Reinforcing steel bar detector with probe for identifying distribution of reinforcing mesh

Abstract

The utility model discloses a reinforcing steel bar detector with a probe for identifying distribution of a reinforcing steel bar mesh, which belongs to the technical field of reinforcing steel bar detection and comprises a sensor module and a host controller connected with the sensor module through a signal line. The sensor module comprises an electromagnetic induction module, an ultra-wideband radar module, an ultrasonic transducer, a frequency-mixing medium-frequency amplifying circuit, an orthogonal frequency-mixing filter circuit, an analog signal conditioning circuit, an A / D converter, a measurement module and a laser module; the electromagnetic induction module comprises a signal generation circuit, an induction coil and a signal acquisition circuit; the host controller comprises a microcontroller module, a data transmission module, an interface module, a clock module, a memory module, a USB port module and a power supply module. According to the utility model, the detection of the steel bar diameter and the steel bar burial depth in the building component is effectively realized, and the requirements in actual engineering detection are met.

Description

Technical Field

[0001] This utility model belongs to the field of rebar detection technology, and in particular relates to a rebar detector with a probe for identifying the distribution of rebar mesh. Background Technology

[0002] According to the regulations, the steel bars in reinforced concrete structures need to be tested during the final acceptance of buildings and the safety assessment of old buildings. Among them, the diameter of the steel bars and the embedment depth of the steel bars (the thickness of the protective layer) are the key points of the steel bar testing.

[0003] Existing rebar detectors are basically based on the principle of electromagnetic induction. They mainly work by calibrating the induced electromotive force of the protective layer thickness and rebar specifications under different conditions, establishing a database of common protective layer thicknesses and rebar diameters, and then matching another parameter based on the actual measured induced electromotive force value and the pre-input protective layer thickness or rebar diameter.

[0004] This limits existing rebar testing equipment to verifying parameters, making it unable to test buildings with unknown design information.

[0005] Therefore, new equipment needs to be developed to simultaneously measure the diameter and embedment depth of steel bars in buildings when design information is lacking, in order to meet the needs of actual engineering testing. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a rebar detector with a probe to identify the distribution of rebar mesh, so as to realize the synchronous measurement of rebar diameter and rebar embedment depth in buildings when design information is lacking.

[0007] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0008] A rebar detector with a probe for identifying the distribution of rebar mesh is characterized by: comprising a sensor module and a host controller connected to it via a signal line; the sensor module includes an electromagnetic induction module, an ultra-wideband radar module, an ultrasonic transducer, a mixer-amplifier circuit, a quadrature mixer-filter circuit, an analog signal conditioning circuit, an A / D converter, a measurement module, and a laser module; the electromagnetic induction module includes a signal generation circuit, an induction coil, and a signal acquisition circuit; the host controller includes a microcontroller module, a data transmission module, an interface module, a clock module, a memory module, a USB port module, and a power supply module; the ultra-wideband radar module is connected to the microcontroller module sequentially via the ultrasonic transducer, the mixer-amplifier circuit, the quadrature mixer-filter circuit, the analog signal conditioning circuit, and the A / D converter; the signal generation circuit is connected to the microcontroller module sequentially via the induction coil and the signal acquisition circuit; the data transmission module, the interface module, the clock module, the memory module, the USB port module, and the power supply module are respectively connected to the microcontroller module; the power supply module includes mains power, a rechargeable battery, and a charging control module; the mains power is connected to the rechargeable battery via the charging control module; the rechargeable battery and the mains power are directly connected to the microcontroller module.

[0009] As a further preferred embodiment of the rebar detector with probe for identifying the distribution of rebar mesh according to this utility model, the ultra-wideband radar module includes a transmitter, a receiver, a transmitting antenna, and a receiving antenna, used for transmitting and receiving radar signals.

[0010] As a further preferred embodiment of the rebar detector with probe for identifying rebar mesh distribution according to this utility model, the analog signal conditioning circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1, a second capacitor C2, a first operational amplifier U1, a second operational amplifier U2, a voltage input terminal VIN, and a voltage output terminal VOUT. The voltage input terminal VIN is connected to one end of the first resistor R1. The other end of the first resistor R1 is connected to the negative input terminal of the first operational amplifier U1, one end of the second resistor R2, and one end of the first capacitor C1. The other end of the first capacitor C1 is connected to the other end of the second resistor R2, the first... The output terminal of operational amplifier U1 is connected to one end of the fifth resistor R5. The other end of the fifth resistor R5 is connected to one end of the second capacitor C2, one end of the sixth resistor R6, and the negative input terminal of the second operational amplifier U2. The other end of the second capacitor C2 is connected to the other end of the sixth resistor R6, the output terminal of the second operational amplifier U2, and the voltage output VOUT terminal. The positive input terminal of the second operational amplifier U2 is connected to one end of the seventh resistor R7 and one end of the eighth resistor R8. The other ends of the seventh resistor R7 and the other ends of the eighth resistor R8 are connected and grounded. The positive input terminal of the first operational amplifier U1 is connected to one end of the third resistor R3 and one end of the fourth resistor R4. The other ends of the third resistor R3 and the other ends of the fourth resistor R4 are connected and grounded.

[0011] As a further preferred embodiment of the rebar detector with probe for identifying rebar mesh distribution according to this utility model, the microcontroller module includes an AD acquisition control unit, a data processing and RAM read / write module unit, a port control unit, a synchronous clock control unit, a command deframe unit, a FIFO data buffer unit, a data interpretation unit, as well as a power supply circuit, a reset circuit, a crystal oscillator circuit, a download circuit, and a configuration SPI Flash circuit. The AD acquisition control unit, port control unit, synchronous clock control unit, command deframe unit, FIFO data buffer unit, data interpretation unit, power supply circuit, reset circuit, crystal oscillator circuit, download circuit, and configuration SPI Flash circuit are respectively connected to the data processing and RAM read / write module unit.

[0012] As a further preferred embodiment of the rebar detector with probe for identifying rebar mesh distribution according to this utility model, the charging control module includes a charging control circuit, a charging controller, an overcurrent protection circuit, a demodulation module, a full-bridge driver, and a voltage regulation module. The charging control circuit and the overcurrent protection circuit are respectively connected to the charging controller, and the charging controller is connected to the full-bridge driver through the demodulation module and the voltage regulation module.

[0013] The charging control circuit is connected to the rechargeable battery and is used for charging control of the rechargeable battery.

[0014] Overcurrent protection circuit, used for overcurrent protection during charging control of rechargeable batteries;

[0015] The voltage regulation module is connected to the full-bridge driver and is used to achieve automatic voltage regulation through the feedback pin;

[0016] The demodulation module is connected to the full-bridge driver and is used to transmit the demodulated data to the charging controller for processing.

[0017] The charging controller is connected to the voltage regulation module and the demodulation module respectively. It is used to control the voltage regulation accuracy and range of the voltage regulation module, and to process the received power request fed back by the demodulation module in a timely manner. It outputs control signals to the voltage regulation module according to the requirements, thereby realizing precise voltage adjustment at multiple levels.

[0018] As a further preferred embodiment of the present invention, a rebar detector with a probe for identifying the distribution of rebar mesh.

[0019] The case, the aforementioned demodulation

[0020] The module includes a voltage input terminal VIN, resistors R1, R2, R3, and R7, capacitors C1, C2, C3, C5, C6, C7, C8, and C9, an inductor L1, a chip FR9885, and a voltage output V. DCDC Terminal, voltage output V control The voltage input VIN terminal is connected to one end of capacitor C1, one end of capacitor C2, and the VIN terminal of chip FR9885. The other end of capacitor C1 is connected to the other end of capacitor C2, one end of capacitor C3, and the GND terminal of chip FR9885, and grounded. The other end of capacitor C3 is connected to one end of resistor R1. The other end of resistor R1 is connected to the SHDN terminal of chip FR9885. The BST terminal of chip FR9885 is connected to one end of capacitor C9. The other end of capacitor C9 is connected to the LX terminal of chip FR9885 and one end of inductor L1. The other end of inductor L1 is connected to one end of resistor R2, one end of capacitor C5, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8, and the voltage output V. DCDC One end of capacitor C5 is connected to the other end of resistor R2, one end of resistor R3, one end of resistor R7, and the FB terminal of chip FR9885. The other end of resistor R7 is connected to the voltage output V. control One end of resistor R3 is grounded, and the other end of capacitor C6 is connected to the other ends of capacitor C7 and capacitor C8 respectively and grounded.

[0021] As a further preferred embodiment of the rebar detector with probe for identifying rebar mesh distribution according to this utility model, the charging control circuit includes a signal control terminal, a charging power supply terminal, a device power supply terminal, a battery terminal, a transistor, a first MOSFET, and a second MOSFET. The charging power supply terminal is grounded via a first resistor and a second resistor connected in series. The base of the transistor is connected to both the signal control terminal and the charging power supply terminal. The collector of the transistor is connected to the gate of the second MOSFET via a fourth resistor and to the source of the first MOSFET via a third resistor. The emitter of the transistor is grounded. The source of the second MOSFET is connected to the charging power supply terminal via a first diode, and its drain is connected to the device power supply terminal. The source of the first MOSFET is connected to the charging power supply terminal via a first diode, its gate is connected to the junction of the first and second resistors, and its drain is connected to the battery terminal.

[0022] As a further preferred embodiment of the rebar detector with probe for identifying the distribution of rebar mesh according to this utility model, the transmitting antenna and the receiving antenna are planar butterfly dipole antennas, and the frequency of the transmitting antenna and the receiving antenna is 1.6GHz.

[0023] As a further preferred embodiment of the rebar detector with probe for identifying the distribution of rebar mesh according to this utility model, the frequency, number of turns and diameter of the induction coil are 40KHz, 120 and 3 cm, respectively.

[0024] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects:

[0025] 1. This utility model discloses a rebar detector with a probe for identifying the distribution of rebar mesh. It includes a sensor module and a host controller connected to the sensor module via a signal line. The sensor module includes an electromagnetic induction module, an ultra-wideband radar module, an ultrasonic transducer, a mixer-amplifier circuit, an orthogonal mixer-filter circuit, an analog signal conditioning circuit, an A / D converter, a measurement module, and a laser module. The electromagnetic induction module includes a signal generation circuit, an induction coil, and a signal acquisition circuit. The host controller includes a microcontroller module, a data transmission module, an interface module, a clock module, a memory module, a USB port module, and a power supply module. This utility model effectively detects the diameter and embedment depth of rebar inside building components, meeting the needs of practical engineering testing.

[0026] 2. The utility model FPGA main control module uses Xilinx's Artix-7 series FPGA as the main control chip. This chip provides the industry's lowest system cost and power consumption. The device provides the highest performance-to-power ratio structure, transceiver line speed, DSP processing capability and AMS integration in a single cost-optimized FPGA. It optimizes the lowest cost and power consumption in a variety of general logic and DSP applications.

[0027] 3. The signal conditioning and amplification circuit of this utility model can accept the following signal amplitude when the amplitude of the analog signal input from the displacement sensor increases from 0V to 10V. After signal conditioning, the output amplitude is 0V to 4V, which is within the acceptable amplitude range of the AD. Its cutoff bandwidth frequency is approximately 6kHz, which can effectively filter out noise. Therefore, the above-mentioned output analog signal cannot be directly input to the AD conversion chip. These analog signals need to be conditioned by the signal conditioning circuit into an analog signal input acceptable to the AD and the uniformity of these analog signal amplitudes must be ensured.

[0028] 4. This utility model's charging control module includes a charging control circuit, a charging controller, an overcurrent protection circuit, a demodulation module, a full-bridge driver, and a voltage regulation module. The charging control circuit and the overcurrent protection circuit are respectively connected to the charging controller. The charging controller is connected to the full-bridge driver via the demodulation module and the voltage regulation module. The charging control circuit is connected to the rechargeable battery for charging control. The overcurrent protection circuit is used for overcurrent protection during charging control of the rechargeable battery. The voltage regulation module is connected to the full-bridge driver for automatic voltage regulation via a feedback pin. The demodulation module is connected to the full-bridge driver for transmitting demodulated data to the charging controller for processing. The charging controller is connected to both the voltage regulation module and the demodulation module for controlling the voltage regulation accuracy and range of the voltage regulation module, and promptly processing the received power requests fed back by the demodulation module. It outputs control signals to the voltage regulation module as needed, thereby achieving precise multi-level voltage adjustment. Attached Figure Description

[0029] Figure 1 This is a structural principle diagram of a rebar detector with a probe for identifying the distribution of rebar mesh according to this utility model;

[0030] Figure 2 This is a schematic diagram of the sensor module of this utility model;

[0031] Figure 3 This is a schematic diagram of the host controller of this utility model;

[0032] Figure 4 This is a circuit diagram of the analog signal conditioning circuit of this utility model;

[0033] Figure 5 This is a schematic diagram of the microcontroller module of this utility model;

[0034] Figure 6 This is a schematic diagram of the charging control module of this utility model;

[0035] Figure 7 This is the circuit diagram of the demodulation module of this utility model;

[0036] Figure 8 This is a circuit diagram of the charging control circuit of this utility model. Detailed Implementation

[0037] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings:

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] A rebar detector with a probe for identifying the distribution of rebar mesh, such as... Figure 1 As shown, it includes a sensor module and a host controller connected to it via a signal line; this utility model effectively realizes the detection of the diameter and embedment depth of the steel bars inside building components, meeting the needs of actual engineering testing.

[0040] like Figure 2 As shown, the sensor module includes an electromagnetic induction module, an ultra-wideband radar module, an ultrasonic transducer, a mixer intermediate frequency amplifier circuit, an orthogonal mixer filter circuit, an analog signal conditioning circuit, an A / D converter, a measurement module, and a laser module. The electromagnetic induction module includes a signal generation circuit, an induction coil, and a signal acquisition circuit.

[0041] The electromagnetic induction module includes a signal generation circuit, an induction coil, and a signal acquisition circuit, used to generate and receive induced electromotive force.

[0042] The ultra-wideband radar module includes a transmitter, a receiver, a transmitting antenna, and a receiving antenna, used for transmitting and receiving radar signals;

[0043] The measurement module is used to measure the distance traveled;

[0044] The laser module is used to guide the direction of movement, so that the detection can proceed along a straight trajectory along a preset measurement line;

[0045] The main control module is used to control the electromagnetic induction module and the ultra-wideband radar module to collect data synchronously; the data includes induced electromotive force and radar echo data, which are used to detect the diameter and embedment depth of the steel bars inside the building components.

[0046] like Figure 3 As shown, the host controller includes a microcontroller module, a data transmission module, an interface module, a clock module, a memory module, a USB port module, and a power supply module;

[0047] The ultra-wideband radar module is connected to the microcontroller module sequentially via an ultrasonic transducer, a mixer intermediate frequency amplifier circuit, a quadrature mixer filter circuit, an analog signal conditioning circuit, and an A / D converter. The signal generation circuit is connected to the microcontroller module sequentially via an induction coil and a signal acquisition circuit. The data transmission module, interface module, clock module, memory module, USB port module, and power supply module are connected to the microcontroller module. The power supply module includes AC power, a rechargeable battery, and a charging control module. The AC power is connected to the rechargeable battery through the charging control module, and the rechargeable battery and AC power are directly connected to the microcontroller module.

[0048] The ultra-wideband radar module includes a transmitter, a receiver, a transmitting antenna, and a receiving antenna, used for transmitting and receiving radar signals.

[0049] like Figure 4 As shown, the analog signal conditioning circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1, a second capacitor C2, a first operational amplifier U1, a second operational amplifier U2, a voltage input terminal VIN, and a voltage output terminal VOUT. The voltage input terminal VIN is connected to one end of the first resistor R1. The other end of the first resistor R1 is connected to the negative input terminal of the first operational amplifier U1, one end of the second resistor R2, and one end of the first capacitor C1. The other end of the first capacitor C1 is connected to the other end of the second resistor R2, the output terminal of the first operational amplifier U1, and the fifth resistor R8. One end of resistor R5 and the other end of the fifth resistor R5 are respectively connected to one end of the second capacitor C2, one end of the sixth resistor R6, and the negative input terminal of the second operational amplifier U2. The other end of the second capacitor C2 is respectively connected to the other end of the sixth resistor R6, the output terminal of the second operational amplifier U2, and the voltage output VOUT terminal. The positive input terminal of the second operational amplifier U2 is respectively connected to one end of the seventh resistor R7 and one end of the eighth resistor R8. The other ends of the seventh resistor R7 and the other ends of the eighth resistor R8 are connected and grounded. The positive input terminal of the first operational amplifier U1 is respectively connected to one end of the third resistor R3 and one end of the fourth resistor R4. The other ends of the third resistor R3 and the other ends of the fourth resistor R4 are connected and grounded.

[0050] like Figure 5As shown, the microcontroller module includes an AD acquisition control unit, a data processing and RAM read / write module unit, a port control unit, a synchronous clock control unit, a command deframe unit, a FIFO data buffer unit, a data interpretation unit, as well as a power supply circuit, a reset circuit, a crystal oscillator circuit, a download circuit, and a configuration SPI Flash circuit. The AD acquisition control unit, port control unit, synchronous clock control unit, command deframe unit, FIFO data buffer unit, data interpretation unit, power supply circuit, reset circuit, crystal oscillator circuit, download circuit, and configuration SPI Flash circuit are respectively connected to the data processing and RAM read / write module unit.

[0051] The FPGA control module includes a data acquisition control module, a data processing module, a RAM read / write module, an interface chip control unit, a synchronous clock control module, a command frame decoding module, a data interpretation module, as well as a power supply circuit, a reset circuit, a crystal oscillator circuit, a download circuit, and a configuration SPI Flash circuit. The data acquisition control module, interface chip control unit, synchronous clock control module, command frame decoding module, data interpretation module, power supply circuit, reset circuit, crystal oscillator circuit, download circuit, and configuration SPI Flash circuit are respectively connected to the data processing module and the RAM read / write module.

[0052] After the system powers on, it waits for the FPGA to complete initialization and enters a connection-waiting state. When relevant command parameters are input externally, the FPGA receives and parses the commands. First, it controls the internal selection switch of the system to operate, connecting the selected device signal to the acquisition system. Then, it sends control information to the device under test (DUT), while the acquisition system monitors the power supply status of the DUT in real time. Subsequently, the acquired data is buffered in the FPGA's internal Random Access Memory (RAM) for processing. Finally, the acquired data is transmitted back to an external monitor for real-time display via the FPGA's on-chip First-In-First-Out (FIFO) queue. The data is then processed and stored according to appropriate rules to generate a test data report.

[0053] After data acquisition, the sampled data from the corresponding channels is sent to a monitor for real-time display and stored in the Flash memory, awaiting read commands from an external controller. This system uses STMicroelectronics' S25FL128P Flash memory for real-time storage. This chip has a storage capacity of 128Mbit and communicates with the external controller via an SPI interface with a maximum clock frequency of 104MHz. This chip is characterized by its simple design, stable data storage, and low cost, making it widely applicable. The system uses an FPGA to control the AD7609 during data transmission during conversion, enabling a sampling rate of 200kHz. By rationally utilizing the FPGA's internal resources and implementing a ping-pong data buffering method, real-time data transmission and Flash storage are achieved, enhancing the reliability, effectiveness, and stability of data transmission and storage, and greatly leveraging the FPGA's high-speed parallel data processing capabilities and timing constraints. This system has been successfully applied in a practical engineering monitoring project and has significant application value.

[0054] like Figure 6 As shown, the charging control module includes a charging control circuit, a charging controller, an overcurrent protection circuit, a demodulation module, a full-bridge driver, and a voltage regulation module. The charging control circuit and the overcurrent protection circuit are respectively connected to the charging controller, and the charging controller is connected to the full-bridge driver through the demodulation module and the voltage regulation module.

[0055] The charging control circuit is connected to the rechargeable battery and is used for charging control of the rechargeable battery.

[0056] Overcurrent protection circuit, used for overcurrent protection during charging control of rechargeable batteries;

[0057] The voltage regulation module is connected to the full-bridge driver and is used to achieve automatic voltage regulation through the feedback pin;

[0058] The demodulation module is connected to the full-bridge driver and is used to transmit the demodulated data to the charging controller for processing.

[0059] The charging controller is connected to the voltage regulation module and the demodulation module respectively. It is used to control the voltage regulation accuracy and range of the voltage regulation module, and to process the received power request fed back by the demodulation module in a timely manner. It outputs control signals to the voltage regulation module according to the requirements, thereby realizing precise voltage adjustment at multiple levels.

[0060] like Figure 7As shown, the demodulation module includes a voltage input VIN terminal, resistors R1, R2, R3, and R7, capacitors C1, C2, C3, C5, C6, C7, C8, and C9, an inductor L1, a FR9885 chip, a voltage output VDCDC terminal, and a voltage output Vcontrol terminal. The voltage input VIN terminal is connected to one end of capacitor C1, one end of capacitor C2, and the VIN terminal of the FR9885 chip. The other end of capacitor C1 is connected to the other end of capacitor C2, one end of capacitor C3, and the GND terminal of the FR9885 chip and grounded. The other end of capacitor C3 is connected to one end of resistor R1, and the other end of resistor R1 is connected to the FR9885 chip. The SHDN terminal of the chip FR9885 is connected to one end of capacitor C9. The other end of capacitor C9 is connected to the LX terminal of the chip FR9885 and one end of inductor L1. The other end of inductor L1 is connected to one end of resistor R2, one end of capacitor C5, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8 and the voltage output VDCDC terminal. The other end of capacitor C5 is connected to the other end of resistor R2, one end of resistor R3, one end of resistor R7 and the FB terminal of the chip FR9885. The other end of resistor R7 is connected to the voltage output Vcontrol terminal. The other end of resistor R3 is grounded. The other end of capacitor C6 is connected to the other ends of capacitor C7 and capacitor C8 and grounded.

[0061] By controlling the voltage regulation accuracy and range of the voltage regulation module and promptly processing the received power request fed back by the demodulation module, the system outputs control signals to the voltage regulation module as needed, thereby achieving precise voltage regulation at multiple levels. It does not require a high-frequency MCU; it only needs to generate control signals through the MCU to control the voltage regulation module, thus achieving precise and reliable voltage regulation.

[0062] like Figure 8 As shown, the charging control circuit includes a signal control terminal, a charging power supply terminal, a device power supply terminal, a battery terminal, a transistor, a first MOSFET, and a second MOSFET. The charging power supply terminal is grounded via a first resistor and a second resistor connected in series. The base of the transistor is connected to both the signal control terminal and the charging power supply terminal. The collector of the transistor is connected to the gate of the second MOSFET via a fourth resistor and to the source of the first MOSFET via a third resistor. The emitter of the transistor is grounded. The source of the second MOSFET is connected to the charging power supply terminal via a first diode, and its drain is connected to the device power supply terminal. The source of the first MOSFET is connected to the charging power supply terminal via a first diode, its gate is connected to the junction of the first and second resistors, and its drain is connected to the battery terminal.

[0063] This invention uses a MOSFET as a power device, resulting in high power efficiency. When the device battery is charging, it can cut off the battery power supply and switch to power supply to the device to protect the battery and extend its life. The device can be turned on and off through hardware and software control, and can also be reset through the hardware reset port to turn off the device.

[0064] The transmitting and receiving antennas are planar butterfly dipole antennas, and the frequency of the transmitting and receiving antennas is 1.6 GHz.

[0065] The frequency, number of turns, and diameter of the induction coil are 40 kHz, 120 cm, and 3 cm, respectively.

[0066] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A rebar detector with a probe for identifying the distribution of rebar mesh, characterized in that: The system includes a sensor module and a host controller connected to it via signal lines. The sensor module comprises an electromagnetic induction module, an ultra-wideband radar module, an ultrasonic transducer, a mixer-amplifier circuit, a quadrature mixer-filter circuit, an analog signal conditioning circuit, an A / D converter, a measurement module, and a laser module. The electromagnetic induction module includes a signal generation circuit, an induction coil, and a signal acquisition circuit. The host controller includes a microcontroller module, a data transmission module, an interface module, a clock module, a memory module, a USB port module, and a power supply module. The ultra-wideband radar module is connected to the microcontroller module sequentially via the ultrasonic transducer, mixer-amplifier circuit, quadrature mixer-filter circuit, analog signal conditioning circuit, and A / D converter. The signal generation circuit is connected to the microcontroller module sequentially via the induction coil and signal acquisition circuit. The data transmission module, interface module, clock module, memory module, USB port module, and power supply module are all connected to the microcontroller module. The power supply module includes AC power, a rechargeable battery, and a charging control module. The AC power is connected to the rechargeable battery via the charging control module, and the rechargeable battery and AC power are directly connected to the microcontroller module.

2. The rebar detector with probe for identifying rebar mesh distribution according to claim 1, characterized in that: The ultra-wideband radar module includes a transmitter, a receiver, a transmitting antenna, and a receiving antenna, used for transmitting and receiving radar signals.

3. A rebar detector with a probe for identifying the distribution of rebar mesh according to claim 1, characterized in that: The analog signal conditioning circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1, a second capacitor C2, a first operational amplifier U1, a second operational amplifier U2, a voltage input terminal VIN, and a voltage output terminal VOUT. The voltage input terminal VIN is connected to one end of the first resistor R1. The other end of the first resistor R1 is connected to the negative input terminal of the first operational amplifier U1, one end of the second resistor R2, and one end of the first capacitor C1. The other end of the first capacitor C1 is connected to the other end of the second resistor R2, the output terminal of the first operational amplifier U1, and the fifth resistor R8. One end of resistor R5 and the other end of resistor R5 are respectively connected to one end of the second capacitor C2, one end of the sixth resistor R6, and the negative input terminal of the second operational amplifier U2. The other end of the second capacitor C2 is respectively connected to the other end of the sixth resistor R6, the output terminal of the second operational amplifier U2, and the voltage output VOUT terminal. The positive input terminal of the second operational amplifier U2 is respectively connected to one end of the seventh resistor R7 and one end of the eighth resistor R8. The other ends of the seventh resistor R7 and the other ends of the eighth resistor R8 are connected and grounded. The positive input terminal of the first operational amplifier U1 is respectively connected to one end of the third resistor R3 and one end of the fourth resistor R4. The other ends of the third resistor R3 and the other ends of the fourth resistor R4 are connected and grounded.

4. A rebar detector with a probe for identifying the distribution of rebar mesh according to claim 1, characterized in that: The microcontroller module includes an AD acquisition control unit, a data processing and RAM read / write module unit, a port control unit, a synchronous clock control unit, a command deframe unit, a FIFO data buffer unit, a data interpretation unit, as well as a power supply circuit, a reset circuit, a crystal oscillator circuit, a download circuit, and a configuration SPI Flash circuit. The AD acquisition control unit, port control unit, synchronous clock control unit, command deframe unit, FIFO data buffer unit, data interpretation unit, power supply circuit, reset circuit, crystal oscillator circuit, download circuit, and configuration SPI Flash circuit are respectively connected to the data processing and RAM read / write module unit.

5. A rebar detector with a probe for identifying the distribution of rebar mesh according to claim 1, characterized in that: The charging control module includes a charging control circuit, a charging controller, an overcurrent protection circuit, a demodulation module, a full-bridge driver, and a voltage regulation module. The charging control circuit and the overcurrent protection circuit are respectively connected to the charging controller, and the charging controller is connected to the full-bridge driver through the demodulation module and the voltage regulation module. The charging control circuit is connected to the rechargeable battery and is used for charging control of the rechargeable battery. Overcurrent protection circuit, used for overcurrent protection during charging control of rechargeable batteries; The voltage regulation module is connected to the full-bridge driver and is used to achieve automatic voltage regulation through the feedback pin; The demodulation module is connected to the full-bridge driver and is used to transmit the demodulated data to the charging controller for processing. The charging controller is connected to the voltage regulation module and the demodulation module respectively. It is used to control the voltage regulation accuracy and range of the voltage regulation module, and to process the received power request fed back by the demodulation module in a timely manner. It outputs control signals to the voltage regulation module according to the requirements, thereby realizing precise voltage adjustment at multiple levels.

6. A rebar detector with a probe for identifying the distribution of rebar mesh according to claim 5, characterized in that: The demodulation module includes a voltage input terminal VIN, resistors R1, R2, R3, and R7, capacitors C1, C2, C3, C5, C6, C7, C8, and C9, an inductor L1, a chip FR9885, and a voltage output V. DCDC Terminal, voltage output V control The voltage input VIN terminal is connected to one end of capacitor C1, one end of capacitor C2, and the VIN terminal of chip FR9885. The other end of capacitor C1 is connected to the other end of capacitor C2, one end of capacitor C3, and the GND terminal of chip FR9885, and grounded. The other end of capacitor C3 is connected to one end of resistor R1. The other end of resistor R1 is connected to the SHDN terminal of chip FR9885. The BST terminal of chip FR9885 is connected to one end of capacitor C9. The other end of capacitor C9 is connected to the LX terminal of chip FR9885 and one end of inductor L1. The other end of inductor L1 is connected to one end of resistor R2, one end of capacitor C5, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8, and the voltage output V. DCDC One end of capacitor C5 is connected to the other end of resistor R2, one end of resistor R3, one end of resistor R7, and the FB terminal of chip FR9885. The other end of resistor R7 is connected to the voltage output V. control One end of resistor R3 is grounded, and the other end of capacitor C6 is connected to the other ends of capacitor C7 and capacitor C8 respectively and grounded.

7. A rebar detector with a probe for identifying the distribution of rebar mesh according to claim 5, characterized in that: The charging control circuit includes a signal control terminal, a charging power supply terminal, a device power supply terminal, a battery terminal, a transistor, a first MOSFET, and a second MOSFET. The charging power supply terminal is grounded via a first resistor and a second resistor connected in series. The base of the transistor is connected to both the signal control terminal and the charging power supply terminal. The collector of the transistor is connected to the gate of the second MOSFET via a fourth resistor and to the source of the first MOSFET via a third resistor. The emitter of the transistor is grounded. The source of the second MOSFET is connected to the charging power supply terminal via a first diode, and its drain is connected to the device power supply terminal. The source of the first MOSFET is connected to the charging power supply terminal via a first diode, its gate is connected to the junction of the first and second resistors, and its drain is connected to the battery terminal.

8. A rebar detector with a probe for identifying the distribution of rebar mesh according to claim 2, characterized in that: The transmitting and receiving antennas are planar butterfly dipole antennas, and the frequency of the transmitting and receiving antennas is 1.6 GHz.

9. A rebar detector with a probe for identifying the distribution of rebar mesh according to claim 2, characterized in that: The frequency, number of turns, and diameter of the induction coil are 40 kHz, 120 mm, and 3 cm, respectively.

Images