Mining intrinsic safety type electronic fence sensor circuit based on radar

Abstract

The utility model belongs to sensors, and particularly relates to a radar-based electronic fence sensor circuit, which comprises a radar signal acquisition circuit and a radar level detection circuit, and is characterized in that the radar signal acquisition circuit comprises a first power supply module circuit, a single chip microcomputer signal acquisition circuit and a signal driving output circuit; the radar level detection circuit comprises a second power module circuit, a radar transmitting and receiving module, a single-chip microcomputer collecting and processing circuit and a serial port data output circuit. The radar transmitting and receiving module comprises a microwave distance measuring radar and is used for detecting the distance between an external object and the electronic fence sensor; the single-chip microcomputer acquisition and processing circuit comprises a second single-chip microcomputer, and the second single-chip microcomputer compares the distance data sent by the radar sending and receiving module with preset distance data; according to the utility model, through the radar transmitting and receiving module, the distance of an object near the electronic fence sensor can be accurately detected in a severe environment of an underground coal mine, the safety of miners is ensured, and the production rate is improved.

Description

Technical Field

[0001] The utility model belongs to a sensor, in particular to an electronic fence sensor circuit based on radar. Background Art

[0002] There are many forms of implementation of mining electronic fence sensors now, and this type of electronic fence sensor is easily interfered by the complex working environment in coal mines, resulting in inaccurate detection results, and then sending erroneous signals to the working mining equipment; in coal mines, especially on the front-line working face, the working environment is relatively harsh, with heavy dust, fog and interference, which brings a great test to the electronic fence sensor. In addition to being able to work stably and reliably, the sensor must also consider its anti-interference ability and environmental adaptability, especially the interlocking protection action of the sensor and other mining equipment, and the sensor is not allowed to malfunction; for example, for a running tunnel boring machine, once the sensor sends a false signal, the controller will mistakenly believe that a staff member has entered the working area of ​​the tunnel boring machine. When the running tunnel boring machine and other equipment receive the interlocking shutdown signal, the working tunnel boring machine will shut down, and the restart of the mining equipment after shutdown will bring inconvenience to production and safety, and reduce the production rate. Utility Model Content

[0003] In view of this, the utility model provides a radar-based intrinsically safe electronic fence sensor circuit for mining, which can ensure the stable operation of the electronic fence sensor for mining and avoid the situation where mining equipment stops operating due to false signals sent by the sensor.

[0004] The technical solution of the utility model is: a radar-based intrinsically safe electronic fence sensor circuit for mining, including a radar signal acquisition circuit and a radar level detection circuit. The radar signal acquisition circuit includes: a first power module circuit, a single-chip microcomputer signal acquisition circuit and a signal drive output circuit, wherein:

[0005] The first power supply module circuit includes a first voltage stabilizing module and a second voltage stabilizing module connected in series. The first voltage stabilizing module converts a 12V input voltage into a 5V output voltage. The converted 5V output voltage provides voltage for the radar level detection circuit. The second voltage stabilizing module converts the 5V voltage output by the first voltage stabilizing module into a 3.3V output voltage. The converted 3.3V output voltage is used to power the entire radar signal acquisition circuit.

[0006] The single-chip microcomputer signal acquisition circuit includes a first single-chip microcomputer, a 485 circuit and an optocoupler output circuit. The first single-chip microcomputer is connected to the 485 circuit and the optocoupler output circuit. The 485 circuit is also connected to the radar level detection circuit. The first single-chip microcomputer outputs the control signal through the optocoupler output circuit.

[0007] The signal drive output circuit is connected to the optocoupler output circuit and the external mining equipment. The signal drive output circuit amplifies the signal output by the optocoupler output circuit and controls the operation of the external mining equipment.

[0008] The radar level detection circuit includes: a second power supply module circuit, a radar transmitting and receiving module, a single chip microcomputer acquisition and processing circuit and a serial port data output circuit, wherein:

[0009] A second power module circuit includes a power module, which converts the 5V voltage output by the first voltage stabilizing module into a 3.3V output voltage. The converted 3.3V output voltage is used to power the entire radar level detection circuit;

[0010] Radar transmitting and receiving module, including microwave ranging radar, is used to detect the distance between external objects and the electronic fence sensor. At the same time, the microwave ranging radar is connected to the 485 circuit;

[0011] The single-chip microcomputer acquisition and processing circuit includes a second single-chip microcomputer connected to the radar transmitting and receiving module, the second single-chip microcomputer is set with preset distance data, and the second single-chip microcomputer compares the distance data sent by the radar transmitting and receiving module with the preset distance data;

[0012] The serial port data output circuit connects the second single chip microcomputer with the first single chip microcomputer and is used to transmit data of the second single chip microcomputer to the first single chip microcomputer.

[0013] Furthermore, a power fuse and a diode for protecting the first power module circuit are provided between the first voltage stabilizing module and the power supply; and a two-stage overvoltage protection circuit is connected in parallel inside the first voltage stabilizing module.

[0014] Furthermore, a power indicator light is connected to the side of the second voltage stabilizing module that outputs 3.3V voltage, and an output indicator light is connected to the signal drive output circuit.

[0015] Furthermore, the 485 circuit is connected to an output protection circuit, which includes a fuse and a voltage-stabilizing diode. A resistor is connected to one side of the fuse, and multiple voltage-stabilizing diodes are connected in parallel between the fuse and the resistor.

[0016] The beneficial effects of the present invention are as follows: the distance between an object and an electronic fence sensor is detected by a microwave ranging radar, and the microwave ranging radar measures the distance of an object by measuring the time difference between the transmitted and received signals. The radar transmitting and receiving module has a certain penetrating ability, and the radio waves it transmits can penetrate smoke and dust, and has strong anti-interference ability and environmental adaptability; the radar transmitting and receiving module ensures that the distance of objects near the electronic fence sensor is accurately detected in the harsh environment of a coal mine; the real-time detection data of the radar transmitting and receiving module is compared with the set distance by the second single-chip microcomputer, and the compared data is sent to the first single-chip microcomputer, and then the first single-chip microcomputer controls the mining equipment through the optocoupler output circuit and the signal drive output circuit, so as to avoid the electronic fence sensor sending an erroneous signal to the mining equipment, causing the mining equipment to stop running, thereby improving the production rate and ensuring the life safety of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a schematic diagram of the overall framework of the utility model;

[0019] Figure 2 This is a schematic diagram of the framework of the signal acquisition circuit of the single chip microcomputer of the utility model;

[0020] Figure 3 This is a schematic diagram of the framework of the 485 circuit of the utility model. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "one side", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention; the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "set", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The technical solution of the present utility model will be described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-3 As shown, the radar-based intrinsically safe electronic fence sensor circuit for mining includes a radar signal acquisition circuit 1 and a radar level detection circuit 5. The radar signal acquisition circuit 1 includes: a first power module circuit 2, a single-chip microcomputer signal acquisition circuit 3 and a signal drive output circuit 4; the radar level detection circuit 5 includes: a second power module circuit 6, a radar transmitting and receiving module 7, a single-chip microcomputer acquisition and processing circuit 8 and a serial port data output circuit 9.

[0025] Among them, the first power supply module circuit 2 includes a first voltage stabilizing module 21 and a second voltage stabilizing module 22 connected in series. The first voltage stabilizing module 21 converts the 12V input voltage into a 5V output voltage. The converted 5V output voltage provides voltage for the radar level detection circuit 5. The second voltage stabilizing module 22 converts the 5V voltage output by the first voltage stabilizing module 21 into a 3.3V output voltage. The converted 3.3V output voltage is used to power the entire radar signal acquisition circuit 1. The side of the second voltage stabilizing module 22 that outputs the 3.3V voltage is connected to a power indicator light 26.

[0026] In this embodiment, if Figure 2 As shown, a power fuse 23 and a diode 24 for protecting the first power module circuit 2 are provided between the first voltage stabilizing module 21 and the power supply; a plurality of overvoltage protection circuits 25 are connected in parallel inside the first voltage stabilizing module 21 .

[0027] Based on the above embodiment, the diode 24 is used to enable the first power module circuit 2 to have a circuit anti-reverse connection function, thereby ensuring the power safety of the first power module circuit 2; the overvoltage protection circuit 25 inside the first voltage stabilizing module 21 is used to prevent the radar signal acquisition circuit 1 and the radar level detection circuit 5 from being damaged due to excessive voltage, and at the same time, the power indicator light 26 is used to remind the staff of the opening and closing status of the electronic fence sensor.

[0028] In this embodiment, the single-chip microcomputer signal acquisition circuit 3 includes a first single-chip microcomputer 31, a 485 circuit 32 and an optocoupler output circuit 33. The first single-chip microcomputer 31 is connected to the 485 circuit 32 and the optocoupler output circuit 33. The 485 circuit 32 is connected to the radar level detection circuit 5. The first single-chip microcomputer 31 outputs the signal through the optocoupler output circuit 33.

[0029] Among them, such as Figure 3 As shown, the 485 circuit 32 is connected to an output protection circuit 34, which includes a fuse 341 and a voltage-stabilizing diode 342. A resistor 343 is connected to one side of the fuse 341, and multiple voltage-stabilizing diodes 342 are connected in parallel between the fuse 341 and the resistor 343.

[0030] The signal drive output circuit 4 is connected to the optocoupler output circuit 33 and the external mining equipment. The signal drive output circuit 4 amplifies the signal output by the optocoupler output circuit 33 to control the operation of the external mining equipment. The signal drive output circuit 4 is connected to an output indicator light.

[0031] Based on the above embodiment, the first single chip microcomputer 31 controls the operation of the radar transmitting and receiving module 7 in the radar level detection circuit 5 through the 485 circuit 32. At the same time, the first single chip microcomputer 31 sends a control signal to the external mining equipment through the optocoupler output circuit 33 and the signal drive output circuit 4.

[0032] In this embodiment, the second power module circuit 6 includes a power module 61, which converts the 5V voltage output by the first voltage stabilizing module 21 into an output voltage of 3.3V. The converted 3.3V output voltage is used to power the entire radar level detection circuit 5.

[0033] Based on the above embodiment, the first power module circuit 2 provides a stable voltage of 5V to the second power module circuit 6 , and the power module 61 converts the 5V voltage into a 3.3V voltage to power the radar level detection circuit 5 .

[0034] In this embodiment, the radar transmitting and receiving module 7 includes a microwave ranging radar, which is used to detect the distance between an external object and the electronic fence sensor. At the same time, the microwave ranging radar is connected to the 485 circuit, and the microwave ranging radar receives the control signal sent by the 485 circuit 32.

[0035] Based on the above embodiment, the radar transmitting and receiving module 7 mainly uses a microwave ranging radar to detect the distance between the object and the electronic fence sensor. The microwave ranging radar is an electronic sensor that senses the distance of an object by transmitting and receiving radio waves. The distance of the object is measured by measuring the time difference between the transmitted and received signals. It works in a frequency modulated continuous wave mode. The microwave ranging radar has the characteristics of small size and light weight, and the radar transmitting and receiving module 7 has a certain penetrating ability. The radio waves it transmits can penetrate smoke and dust, and have strong anti-interference ability and environmental adaptability. The radar transmitting and receiving module 7 can ensure that the distance to nearby objects can still be accurately detected in the harsh environment of the coal mine.

[0036] In this embodiment, the single-chip microcomputer acquisition and processing circuit 8 includes a second single-chip microcomputer 81, which is connected to the radar transmitting and receiving module 7. Preset distance data is set in the second single-chip microcomputer 81. The second single-chip microcomputer 81 compares the distance data sent by the radar transmitting and receiving module 7 with the preset distance data.

[0037] The serial port data output circuit 9 connects the second single chip microcomputer 81 with the first single chip microcomputer 31 and is used to transmit data from the second single chip microcomputer 81 to the first single chip microcomputer 31 .

[0038] Based on the embodiment, the radar transmitting and receiving module 7 detects the distance conditions around the mining equipment in the coal mine and transmits the real-time detection data to the second single-chip microcomputer 81. The second single-chip microcomputer 81 compares the real-time detection distance data sent by the radar transmitting and receiving module 7 with the set distance. When the distance detected by the radar transmitting and receiving module 7 is less than the set distance, the second single-chip microcomputer 81 sends it to the first single-chip microcomputer 31 through the serial port data output circuit 9. The first single-chip microcomputer 31 controls the external mining equipment to stop running through the optocoupler output circuit 33 and the signal drive output circuit 4. In this process, the real-time detection data of the radar transmitting and receiving module 7 is compared with the set distance by the second single-chip microcomputer 81, and the compared data is sent to the first single-chip microcomputer 31. The first single-chip microcomputer 31 then controls the mining equipment to avoid the electronic fence sensor sending an erroneous signal to the mining equipment, causing the mining equipment to stop running, thereby improving the production rate and ensuring the life safety of the staff.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A radar-based intrinsically safe electronic fence sensor circuit for mines, including a radar signal acquisition circuit and a radar level detection circuit, characterized in that: The radar signal acquisition circuit includes: a first power module circuit, a single chip signal acquisition circuit and a signal drive output circuit, wherein: The first power supply module circuit includes a first voltage stabilizing module and a second voltage stabilizing module connected in series. The first voltage stabilizing module converts a 12V input voltage into a 5V output voltage. The converted 5V output voltage provides voltage for the radar level detection circuit. The second voltage stabilizing module converts the 5V voltage output by the first voltage stabilizing module into a 3.3V output voltage. The converted 3.3V output voltage is used to power the entire radar signal acquisition circuit. The single-chip microcomputer signal acquisition circuit includes a first single-chip microcomputer, a 485 circuit and an optocoupler output circuit. The first single-chip microcomputer is connected to the 485 circuit and the optocoupler output circuit. The 485 circuit is connected to the radar level detection circuit. The first single-chip microcomputer outputs the control signal through the optocoupler output circuit. The signal drive output circuit is connected to the optocoupler output circuit and the external mining equipment. The signal drive output circuit amplifies the signal output by the optocoupler output circuit and controls the operation of the external mining equipment. The radar level detection circuit includes: a second power supply module circuit, a radar transmitting and receiving module, a single chip microcomputer acquisition and processing circuit and a serial port data output circuit, wherein: A second power module circuit includes a power module, which converts the 5V voltage output by the first voltage stabilizing module into a 3.3V output voltage. The converted 3.3V output voltage is used to power the entire radar level detection circuit; Radar transmitting and receiving module, including microwave ranging radar, is used to detect the distance between external objects and the electronic fence sensor. At the same time, the microwave ranging radar is connected to the 485 circuit; The single-chip microcomputer acquisition and processing circuit includes a second single-chip microcomputer connected to the radar transmitting and receiving module, the second single-chip microcomputer is set with preset distance data, and the second single-chip microcomputer compares the distance data sent by the radar transmitting and receiving module with the preset distance data; The serial port data output circuit connects the second single chip microcomputer with the first single chip microcomputer and is used to transmit data of the second single chip microcomputer to the first single chip microcomputer.

2. The radar-based intrinsically safe electronic fence sensor circuit for mines according to claim 1, characterized in that: A power fuse and a diode for protecting the first power module circuit are provided between the first voltage stabilizing module and the power supply; a two-stage overvoltage protection circuit is connected in parallel inside the first voltage stabilizing module.

3. The radar-based intrinsically safe electronic fence sensor circuit for mines according to claim 2, characterized in that: The side of the second voltage stabilizing module that outputs 3.3V voltage is connected to a power indicator light, and the signal drive output circuit is connected to an output indicator light.

4. The radar-based intrinsically safe electronic fence sensor circuit for mines according to claim 3, characterized in that: The 485 circuit is connected to an output protection circuit, which includes a fuse and a voltage-stabilizing diode. A resistor is connected to one side of the fuse, and multiple voltage-stabilizing diodes are connected in parallel between the fuse and the resistor.

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