A rapid detector for drilling strain observation instrument

Abstract

The present invention provides a rapid detector for a borehole strain observation instrument, comprising: an AC / DC power supply, an AD meter, standard RS485 and RS232 interfaces, a USB interface, an MCU control unit, a voltage reference source, etc. The borehole strain probe interface J1 of the borehole strain gauge rapid detector is connected to the borehole strain gauge; the auxiliary observation probe interface J2 is connected to the auxiliary measurement probe; the AD conversion interface J4 is connected to the AD port of the data collector according to the channel number; and the USB interface is connected to a personal computer or a laptop computer. Since the system uses a bus mode to send and receive data, when the serial port debugging program of the PC or laptop is opened, the instructions sent by the data terminal to the borehole strain probe and the data replied by the borehole strain probe can be monitored, thereby detecting the working state of the entire system. The rapid detector for the borehole strain observation instrument of the present invention can quickly detect and locate faults on the borehole strain probe, the auxiliary observation probe, the ground data terminal and the AD conversion on site.

Description

Technical Field

[0001] The invention relates to technologies such as intelligent instruments and meters, data transmission bus, AD conversion, and in particular to a rapid detector for a borehole strain observation instrument. Background Art

[0002] In earthquake monitoring, drilling instruments are often used to measure the ground stress and ground strain in the borehole. During the measurement, a well is first drilled in the part of the crust to be measured, and then the measuring probe is lowered into the hole section to be measured, and the measuring probe is coupled to the hole wall by cement pouring or mechanical support. In this way, the deformation of the rock in the borehole will be transmitted to the measuring probe, and the stress and strain measuring element will achieve the purpose of measuring the stress and strain state of the rock mass based on this deformation.

[0003] This type of instrument is used in seismic stations, especially in some remote areas where many unattended stations have poor maintenance conditions. In addition, seismic equipment needs to work and monitor in real time 24 hours a day, so maintenance needs to be completed in the shortest time. The present invention will propose a rapid detector for borehole strain observation instruments, so that seismic stations can quickly locate faults during the maintenance of borehole strain instruments and conduct on-site monitoring of the working status of the equipment. Summary of the invention

[0004] The present invention aims to provide a rapid detector for a borehole strain observation instrument, which can quickly detect and locate faults on-site for a borehole strain probe, an auxiliary observation probe, a ground data terminal and an AD converter.

[0005] The invention discloses a rapid detector for drilling strain observation instrument, comprising: a drilling strain probe interface J1, an auxiliary observation probe interface J2, a data terminal interface J3, an AD conversion interface J4, a USB interface, a control unit U4, an RS485 bus, an intelligent meter U6, a power module U7, a voltage reference source U8, a button group S1-S6 and an AD channel selection switch S7.

[0006] Among them, the drilling strain probe interface J1 is connected to the data terminal interface J3, the control unit U4, and the USB interface respectively through the RS485 bus; the button group S1~S6 is connected to the control unit as a human-machine control operation interface for manual operation of data transmission and reception; the auxiliary observation probe interface J2 is connected to the intelligent instrument U6, and the only side U6 is used to display the analog voltage output by the auxiliary observation probe under the control of the selection switch S8; the voltage reference source U8 is connected to the AD conversion interface J4 through the AD selection switch S7 to send the voltage reference value to the AD conversion channel; the power supply module U7 is connected to the data terminal interface J3 to power the system.

[0007] Preferably, the drilling strain probe interface J1 is used to connect to the drilling strain probe of the drilling strain observation instrument, the auxiliary observation probe interface J2 is used to connect to the auxiliary observation probe, the data terminal interface J3 and the AD conversion interface J4 are used to connect to the data acquisition device, and the USB interface is used to connect to a personal computer or a laptop computer.

[0008] Preferably, the USB interface includes a USB-related interface circuit for converting RS485 bus communication signals into USB data signals, and is used to monitor the data transmission process between the data terminal of the drilling strain gauge and the drilling strain probe using a serial port debugging program on a personal computer or laptop computer by converting the RS485 bus communication signals of the circuit system into USB data mode, and is used for manually sending and receiving bus data.

[0009] Preferably, the USB-related interface includes a MAX485 interface chip that converts RS485 bus communication signals into TTL serial signals and a CH341T type application specific integrated circuit chip that converts TTL serial signals into USB data signals.

[0010] Preferably, the power module U7 is powered by the drilling strain host or data collector through the data terminal interface J3, and generates a voltage of ±9V after stabilizing the power supply to power the system.

[0011] Preferably, a potentiometer R8 is further provided between the voltage reference source U8 and the AD conversion interface J4, and the value of the reference voltage can be adjusted by adjusting the potentiometer R8.

[0012] Preferably, the voltage reference source U8 can send a reference voltage value to the selected AD conversion channel by rotating the channel selection switch S7, thereby detecting the accuracy of the AD conversion value.

[0013] Preferably, the smart meter is a digital meter.

[0014] Preferably, the control unit includes an MCU program control unit.

[0015] Preferably, the MCU program control unit is connected to the RS485 bus through the bus chip U5.

[0016] The beneficial effects of the present invention are:

[0017] 1. Since the present invention uses a bus and an MCU program-controlled device, and uses a USB interface to connect the bus to a PC (or a laptop), the bus working status of the drilling strain probe and the data terminal can be quickly monitored, detected, and faults located;

[0018] 2. The present invention uses an intelligent instrument (digital meter U6) to quickly perform analog voltage detection on the auxiliary observation probe;

[0019] 3. The present invention uses a voltage reference source to detect the AD conversion accuracy of each channel of the data collector.

[0020] 4. The rapid detector for borehole strain observation instrument of the present invention can quickly detect and locate faults on the borehole strain probe, auxiliary observation probe, ground data terminal and AD conversion on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a structural block diagram of a rapid detector for a drilling strain observation instrument of the present invention;

[0023] Figure 2 A schematic diagram of the electrical principle of the rapid detector for drilling strain observation instrument of the present invention. DETAILED DESCRIPTION

[0024] The following will illustrate the implementation methods of the present invention in conjunction with the drawings in the specification. It should be noted that the implementation methods involved in this specification are not exhaustive and do not represent the only implementation methods of the present invention. The following corresponding embodiments are only for the purpose of clearly illustrating the invention content of the patent of the present invention, and are not intended to limit its implementation methods. For ordinary technicians in this field, different forms of changes and modifications can be made on the basis of the description of these embodiments. All obvious changes or modifications that belong to the technical concept and invention content of the present invention are also within the scope of protection of the present invention.

[0025] The rapid detector for a borehole strain observation instrument of the present invention can rapidly detect and locate faults on a borehole strain probe, an auxiliary observation probe, a ground data terminal and an AD converter of the borehole strain observation instrument.

[0026] like Figure 1 and 2As shown, the rapid detector for the borehole strain observation instrument of the present invention includes: a borehole strain probe interface J1, an auxiliary observation probe interface J2, a data terminal interface J3, an AD conversion interface J4, a USB interface, an MCU program control unit U4 (control unit), an RS485 bus, a digital meter (intelligent instrument) U6, a power module U7, a voltage reference source U8, a key group S1-S6 and an AD channel selection switch S7. Here, the borehole strain probe interface J1 is used to connect with the borehole strain probe of the borehole strain observation instrument, the auxiliary observation probe interface J2 is used to connect with the auxiliary probe, the data terminal interface J3 and the AD conversion interface J4 are used to connect with the ground data collector, specifically, the interface J3 is connected to the interface for sending commands of the ground data collector, and the interface J4 is connected to the voltage acquisition port of the ground data collector. The USB interface is used to connect with a personal computer or a laptop.

[0027] The connection relationship between the various components of the rapid detector is introduced below. The drilling strain probe interface J1 is connected to the data terminal interface J3, the MCU program control unit U4, and the USB interface via the RS485 bus. Specifically, the USB interface includes a USB-related interface circuit for converting the RS485 bus signal into a USB data signal. In one embodiment, the related circuit includes an interface chip U2 and a USB bus adapter chip U1. The interface chip U2 is used to convert the R485 bus communication signal into a TTL serial port signal. The USB bus adapter chip U1 is used to convert the TTL serial port signal into a USB data signal. For example, U2 can use a MAX485 chip, and U1 can use a CH341T type dedicated integrated circuit chip. The USB interface is connected to the RS485 bus through U1 and U2, and the RS485 communication signal of the circuit system can be converted into a USB data mode, so that the serial port debugging program can be used on the personal computer side or the laptop side to monitor the data transmission process between the data terminal (J3 end) of the drilling strain gauge and the drilling strain probe (J1 end), and can be used to manually send and receive bus data.

[0028] The button group S1-S6 is connected to the MCU program control unit as a human-machine control operation interface for manually operating data transmission and reception. Here, the MCU program control unit U4 adopts the 89C2051-SIMPLE chip. In addition, the MCU program control unit is connected to the RS485 bus through the interface chip U5. The interface chip U5 can be, for example, a MAX485E chip, which converts the R485 bus communication signal into a TTL serial port signal for identification by the single-chip microcomputer.

[0029] The auxiliary observation probe interface J2 is connected to the digital meter U6, and the digital meter U6 is used to display the analog voltage output by the auxiliary observation probe under the control of the selection switch S8.

[0030] The voltage reference source U8 is connected to the AD conversion interface J4 through the AD selection switch S7 to send a voltage reference value to the AD converter. A potentiometer R8 is also provided between the voltage reference source U8 and the AD conversion interface J4, and the reference voltage value can be adjusted by adjusting the potentiometer R8. By turning the channel selection switch S7, the reference voltage value can be sent to the selected AD conversion channel, thereby detecting the accuracy of the AD conversion value.

[0031] In the present invention, the power module U7 is connected to the data terminal interface J3 to power the system. Here, the power module U7 is powered by the drilling strain host or data collector through the data terminal interface J3, and generates a ±9V voltage after stabilizing the power supply, thereby powering the system.

[0032] The working process of the rapid detector for drilling strain observation instrument (also called drilling strain gauge rapid detector) of the present invention is described in detail below.

[0033] First, connect the borehole strain probe interface J1 of the borehole strain gauge rapid detector to the borehole strain observation instrument; then connect the auxiliary observation probe interface J2 to the auxiliary measurement probe; connect the AD conversion interface J4 to the voltage acquisition port (AD port) of the data collector according to the channel number; connect the USB interface to a personal computer PC or laptop; finally, connect the data terminal interface J3 to the interface for sending commands of the data collector.

[0034] After all interfaces are connected, the power module U7 of the drilling strain gauge rapid detector draws power from the data terminal interface J3. After the connection is completed, the system automatically powers on, and the drilling strain gauge and auxiliary observation probe are also powered on and enter the working state. Since the system uses the bus method to send and receive data, at this time, open the serial port debugging program of the PC or laptop to monitor the instructions sent by the data terminal (J3 interface end) to the drilling strain probe (J1 interface end) and the data replied by the drilling strain probe, so that the working status of the entire system can be easily detected.

[0035] If the data terminal sends instructions abnormally, it can be judged that the data terminal is faulty; if the instructions are normal, but the drilling strain probe responds abnormally or has no response, it can be judged that the drilling strain probe is faulty; if the data terminal sends instructions abnormally, and thus the drilling strain probe has no response, the 2nd and 3rd pins of the data terminal interface J3 can be disconnected, and the serial port debugging program of the PC (or laptop) can be used to manually send instructions or the keyboard can be used to control the MCU program control unit U4 to send instructions, so as to detect whether the drilling strain response is normal.

[0036] The digital meter U6 now displays the analog voltage sent by the auxiliary observation probe of the selected channel, and there is a corresponding relationship between the analog voltage value and the water level, air pressure or well temperature value. The corresponding water level, air pressure or well temperature value can be selected through the S8 selection switch. According to the analog voltage value displayed by the digital meter U6, and then according to the water level, air pressure, and well temperature value on site (which can be obtained by manual reading, such as the well temperature value is read by a thermometer), the two are compared to determine whether the auxiliary observation probe is working normally. For example, if the corresponding well temperature value obtained by the analog voltage value displayed by the digital meter U6 is obviously inconsistent with the well temperature value read by the on-site thermometer, it can be quickly and directly determined that the auxiliary observation probe has a fault.

[0037] The voltage reference source U8 can use the ADR421 chip, which can output a standard voltage of 2.5V. It can be modulated by the potentiometer R8, generally modulated to 1.5V voltage output (it can also be modulated and set as needed). Turn the S7 channel selection switch and check the AD conversion value of each channel of the data acquisition device at this time. If it does not match the voltage reference output value, it can be determined that the AD conversion is faulty.

[0038] In the present invention, since a bus and an MCU program-controlled device are used, and a USB interface is used to connect the bus to a personal computer PC (or a laptop), the bus working status of the drilling strain probe and the data terminal can be quickly monitored, detected, and faults can be located; by using an intelligent instrument (such as a digital meter U6), the auxiliary observation probe can be quickly tested for analog voltage, thereby directly determining whether the auxiliary observation probe is working normally; by using a voltage reference source, the AD conversion accuracy of each channel of the data collector can be tested.

[0039] Obviously, those skilled in the art should realize that the above embodiments are only used to illustrate the present invention, and are not used to limit the present invention. As long as they are within the spirit of the present invention, any changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A rapid detector for drilling strain observation instrument, characterized in that: include: Drilling strain probe interface J1, auxiliary observation probe interface J2, data terminal interface J3, AD conversion interface J4, USB interface, control unit U4, RS485 bus, intelligent instrument U6, power module U7, voltage reference source U8, key group S1~S6 and AD channel selection switch S7, the control unit includes MCU program control unit, Among them, the drilling strain probe interface J1 is connected to the data terminal interface J3, the control unit U4, and the USB interface respectively through the RS485 bus; the button group S1~S6 is connected to the control unit as a human-machine control operation interface for manual operation of data transmission and reception; the auxiliary observation probe interface J2 is connected to the intelligent instrument U6, and the intelligent instrument U6 is used to display the analog voltage output by the auxiliary observation probe under the control of the selection switch S8, and there is a corresponding relationship between the analog voltage value and the water level, air pressure or well temperature value; the voltage reference source U8 is connected to the AD conversion interface J4 through the AD channel selection switch S7 to send the voltage reference value to the AD conversion channel; the power module U7 is connected to the data terminal interface J3 to power the system, The USB interface includes a USB-related interface circuit for converting RS485 bus communication signals into USB data signals. By converting the RS485 bus communication signals of the circuit system into USB data mode, it is used to monitor the data transmission process between the data terminal of the drilling strain gauge and the drilling strain probe using a serial port debugging program on a personal computer or laptop computer, and is used for manually sending and receiving bus data.

2. A rapid detector for drilling strain observation instrument according to claim 1, characterized in that: The drilling strain probe interface J1 is used to connect to the drilling strain probe of the drilling strain observation instrument, the auxiliary observation probe interface J2 is used to connect to the auxiliary observation probe, the data terminal interface J3 and the AD conversion interface J4 are used to connect to the data acquisition device, and the USB interface is used to connect to a personal computer or a laptop.

3. A rapid detector for drilling strain observation instrument according to claim 2, characterized in that: The USB related interface includes a MAX485 interface chip for converting RS485 bus communication signals into TTL serial signals and a CH341T type special integrated circuit chip for converting TTL serial signals into USB data signals.

4. A rapid detector for drilling strain observation instrument according to claim 1, characterized in that: The power module U7 is powered by the drilling strain host or data collector through the data terminal interface J3, and generates a voltage of ±9V after stabilizing the power supply to power the system.

5. The rapid detector for drilling strain observation instrument according to claim 1, characterized in that: A potentiometer R8 is also provided between the voltage reference source U8 and the AD conversion interface J4, and the reference voltage value can be adjusted by adjusting the potentiometer R8.

6. A rapid detector for drilling strain observation instrument according to claim 5, characterized in that: The voltage reference source U8 sends a reference voltage value to the selected AD conversion channel by rotating the AD channel selection switch S7, thereby detecting the accuracy of the AD conversion value.

7. A rapid detector for drilling strain observation instrument according to claim 1, characterized in that: The intelligent instrument is a digital meter.

8. The rapid detector for drilling strain observation instrument according to claim 1, characterized in that: The MCU program control unit is connected to the RS485 bus via the bus chip U5.

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