CN110296772B - Underground temperature measuring instrument - Google Patents

Abstract

The invention provides an underground temperature measuring instrument, which includes: a metal probe, a waterproof gasket, a counterweight body, and a tail cover; the metal probe, the waterproof gasket, and the counterweight body are fixedly connected by screws, and the waterproof gasket is installed on between the metal probe and the counterweight body to provide waterproofing; the counterweight body and the tail cover are connected through threads; the counterweight body, the waterproof gasket and the tail cover are connected through the center and are provided with cables, and the tail cover is provided with Cable outlet; a microcontroller and a temperature sensor are installed in the electric metal probe. One end of the cable is connected to the microcontroller and the temperature sensor, and the other end goes through the cable outlet to connect to external equipment. The beneficial effects of the present invention are: the underground temperature measuring instrument proposed by the present invention can go deep into the well to measure, and uses a host computer to collect measurement data online in real time, ensuring the accuracy of measuring the temperature change of the measured water body. The data can be transmitted through the RS485 protocol to achieve Long-distance measurement, simple structure, small size and easy to use.

Description

An underground temperature measuring instrument

Technical field

The invention relates to the field of instruments, and in particular to an underground temperature measuring instrument.

Background technique

The temperature of groundwater is an important physical parameter in nature. Basically, the dynamic changes of groundwater are related to temperature. Obtaining groundwater temperature is of great significance in hydrogeological surveys. In order to measure the temperature of groundwater accurately and conveniently, a special temperature measuring instrument needs to be developed.

At present, groundwater temperature detection mainly includes two methods: sampling and in-situ detection with portable devices. Water body detection through sampling is an offline test. The temperature of the measured water body will change, which greatly weakens the accuracy of the measured water body. However, the current portable groundwater temperature measurement devices cannot meet the requirements of long-distance transmission and other occasions.

Contents of the invention

In order to solve the above problems, the present invention provides an underground temperature measuring instrument; an underground temperature measuring instrument including: a metal probe, a waterproof gasket, a counterweight body, and a tail cover;

One end of the metal probe is a cone, and the other end is a cylinder. The bottom surface of the cone is fixedly connected to an upper surface of the cylinder. The metal probe is provided with several first screw holes, and the first screw holes are arranged along the The axes of the cone and cylinder run through the entire metal probe; a slot is provided in the cylinder for installing a microcontroller and a temperature sensor; the temperature sensor is electrically connected to the microcontroller, and a cable is connected to the microcontroller. ;

The cross-section of the waterproof gasket is a hollow annular shape, and a plurality of second screw holes matching the first screw holes are provided on the waterproof gasket;

The counterweight body includes a connecting part and a counterweight part; the connecting part is in the shape of a cylinder, and a first through hole is provided along the axis of the connecting part for placing the cable; one bottom surface of the connecting part is provided with There are several third screw holes matching the first screw hole and the second screw hole; the counterweight part includes an inner ring and an outer ring arranged concentrically, and the center of the inner ring is provided with a third screw hole. There are two through holes, there is a receiving space between the outer ring and the inner ring, and the lengths of the outer ring and the inner ring are equal, and heavy metal is placed in the receiving space for counterweight; One end of the inner ring and the outer ring are both fixedly connected to the other bottom surface of the connecting part, and the other end of the outer ring is provided with a first thread;

One end of the tail cap is a ring, and the other end is a hollow cone; the inner surface of the ring is provided with a second thread that matches the first thread, and the counterweight body passes through the first thread. The threaded connection between the second thread and the tail cap is connected together, and a cable outlet is provided at the top of the hollow cone for drawing out the cable;

The metal probe, the waterproof gasket and the counterweight body are connected together with screws through the first screw hole, the second screw hole and the third screw hole, and the waterproof gasket is installed Between the metal probe and the counterweight body, it is used for waterproofing the outer shell;

The first through hole, the second through hole and the cable outlet are coaxial and connected, and are used to set the cable. One end of the cable is connected to the single chip microcomputer, and the other end passes through the first The through hole and the second through hole are led out from the cable outlet to connect external devices.

Further, rings are provided in the installation gaps of the first screw hole, the second screw hole, the third screw hole, the first through hole, the second through hole and the tail cap. Oxygen resin for internal waterproof sealing.

Further, the density of the material of the weight body is greater than the density of water.

Further, the heavy metal is lead.

Further, the temperature sensor is a DS18B20 temperature sensor.

Further, the microcontroller is an STM8 microcontroller or a 51 microcontroller.

Further, the external device is a computer.

Further, the cable is connected to the computer through an RS485 to USB interface, and data is transmitted between the microcontroller and the computer through the RS485 protocol to prevent data from being lost during long-distance transmission.

Further, the usage principle of the underground temperature measuring instrument is: using a temperature sensor to collect the temperature information of groundwater, the microcontroller continuously reads the temperature information, and passes the collected temperature information according to a preset time interval. The RS485 protocol is periodically sent to the host computer; after each ten of the temperature information are received, the host computer averages the ten temperature information, and the host computer stores the average value and passes The display device displays it for viewing.

The beneficial effects brought by the technical solution provided by the present invention are: the underground temperature measuring instrument proposed by the present invention can measure deep underground, and uses a host computer to collect measurement data online in real time, ensuring the accuracy of measuring the temperature change of the measured water body, through RS485 The protocol transmits data and can achieve long-distance measurement. It has a simple structure, small size and is easy to use.

Description of the drawings

The present invention will be further described below in conjunction with the accompanying drawings and examples. In the accompanying drawings:

Figure 1 is a device diagram of an underground temperature measuring instrument in an embodiment of the present invention;

Figure 2 is a specific structural diagram of the metal probe in the embodiment of the present invention;

Figure 3 is a specific structural diagram of the waterproof gasket in the embodiment of the present invention;

Figure 4 is a specific structural diagram of the counterweight body in the embodiment of the present invention;

Figure 5 is a specific structural diagram of the tail cover in the embodiment of the present invention;

Figure 6 is a flow chart of the host computer test in the embodiment of the present invention;

Figure 7 is the host computer interface in the embodiment of the present invention;

Figure 8 is a physical diagram of an underground temperature measuring instrument and its external connection equipment in an embodiment of the present invention.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

An embodiment of the present invention provides an underground temperature measuring instrument.

Please refer to Figure 1. Figure 1 is a device diagram of an underground temperature measuring instrument in an embodiment of the present invention; it includes: a metal probe 1, a waterproof gasket 2, a counterweight body 3, and a tail cover 4;

Please refer to Figure 2, which is a specific structural diagram of a metal probe in an embodiment of the present invention;

One end of the metal probe 1 is a cone 11, and the other end is a cylinder 12. The bottom surface of the cone 11 is fixedly connected to an upper surface of the cylinder 12. The metal probe 1 is provided with several first screw holes 13, so The first screw hole 13 penetrates the entire metal probe 1 along the axis of the cone 11 and the cylinder 12; a slot 14 is provided in the cylinder 12 for installing a microcontroller and a temperature sensor; the temperature sensor is electrically Connected to the single chip microcomputer, and a cable is connected to the single chip microcomputer;

Please refer to Figure 3. Figure 3 is a specific structural diagram of a waterproof gasket in an embodiment of the present invention; the cross-section of the waterproof gasket 2 is a hollow annular shape, and several gaskets connected to the first waterproof gasket 2 are provided on the waterproof gasket 2. The second screw hole 21 matches the screw hole 13;

Please refer to Figure 4. Figure 4 is a specific structural diagram of the counterweight body in the embodiment of the present invention; the counterweight body 3 includes a connecting part 31 and a counterweight part 32; the connecting part 31 is in the shape of a cylinder and extends along the connecting part. A first through hole 311 is provided at the axis of 31 for placing the cable; a bottom surface of the connecting portion 31 is provided with several screw holes 311 that match the first screw hole 13 and the second screw hole 21 The third screw hole 312; the counterweight portion 32 includes an inner ring 321 and an outer ring 322 arranged concentrically. The center of the inner ring 321 is provided with a second through hole 3211. Between the outer ring 322 and the inner ring 321 There is an accommodation space 323 in between, and the length of the outer ring 322 and the inner ring 321 are equal. Heavy metal is placed in the accommodation space 323 for counterweight; the inner ring 321 and the outer ring are One end of 322 is fixedly connected to the other bottom surface of the connecting part 31, and the other end of the outer ring 322 is provided with a first thread 3221;

Please refer to Figure 5, which is a specific structural diagram of the tail cap in the embodiment of the present invention; one end of the tail cap 4 is a ring 41, and the other end is a hollow cone 42; the inner surface of the ring 41 is provided with The first thread 3221 matches the second thread 411, and the counterweight body 3 is connected to the tail cover 4 through the threaded connection between the first thread 3221 and the second thread 411, so The top of the hollow cone 42 is provided with a cable outlet 421 for drawing out the cable;

The metal probe 1, the waterproof gasket 2 and the counterweight body 3 are fixedly connected together with screws through the first screw hole 13, the second screw hole 21 and the third screw hole 312, The waterproof gasket 2 is installed between the metal probe 1 and the counterweight body 3 for waterproofing the outer shell;

The first through hole 311, the second through hole 3211 and the cable outlet 421 are coaxial and connected, and are used to set the cable. One end of the cable is connected to the single chip microcomputer, and the other end passes through the The first through hole 311 and the second through hole 3211 are led out from the cable outlet 421 to connect external devices.

In the installation gaps of the first screw hole 13, the second screw hole 21, the third screw hole 312, the first through hole 311, the second through hole 3211 and the tail cover 4, etc. Both are provided with epoxy resin for internal waterproof sealing.

The density of the material of the counterweight body 3 is greater than the density of water; in the embodiment of the present invention, the material selected for the counterweight body 3 is a nylon rod or a metal of a certain weight.

The heavy metal is lead.

The temperature sensor is a DS18B20 temperature sensor.

The microcontroller is an STM8 microcontroller or a 51 microcontroller.

The external device is a computer.

The cable is connected to the computer through an RS485 to USB interface, and data is transmitted between the microcontroller and the computer through the RS485 protocol to prevent data from being lost during long-distance transmission.

Principle of use: Use a temperature sensor to collect the temperature information of groundwater, the microcontroller continuously reads the temperature information, and periodically sends the collected temperature information to the host computer through the RS485 protocol according to the preset time interval; the host computer After each time the computer receives ten pieces of temperature information, it averages the ten pieces of temperature information, and the host computer stores the average value and displays it through a display device for viewing.

In the embodiment of the present invention, LabVIEW host computer display software is used to receive the data sent by the microcontroller:

Figure 6 shows the host computer test flow chart; in the actual test, the VISA port is first set, including: the baud rate needs to be set to 9600, the stop bit is 10 bits, the data bit is 8 bits, and the parity bit is 0 , manually input the storage file in the default format of xls. Before each measurement, you need to manually input the depth from the surface. You need to click the run button during each test. Press once, measure once. Figure 7 shows the host computer interface.

Figure 8 shows a physical diagram of an underground temperature measuring instrument and its external connection equipment in an embodiment of the present invention.

The beneficial effects of the present invention are: the underground temperature measuring instrument proposed by the present invention can go deep into the well to measure, and adopts a host computer to collect measurement data online in real time, ensuring the accuracy of measuring the temperature change of the measured water body, and transmitting data through the RS485 protocol, which can be achieved Long-distance measurement, simple structure, small size and easy to use.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (6)

1. An underground temperature measuring instrument, characterized in that: comprising the following steps: the metal probe (1), the waterproof gasket (2), the counterweight body (3) and the tail cover (4);

one end of the metal probe (1) is a cone (11), the other end of the metal probe is a cylinder (12), the bottom surface of the cone (11) is fixedly connected with one upper surface of the cylinder (12), a plurality of first screw holes (13) are formed in the metal probe (1), and the first screw holes (13) penetrate through the whole metal probe (1) along the axes of the cone (11) and the cylinder (12); a clamping groove (14) is formed in the cylinder (12) and is used for installing a singlechip and a temperature sensor; the temperature sensor is electrically connected to the singlechip, and a cable is connected to the singlechip;

the section of the waterproof gasket (2) is hollow and annular, and a plurality of second screw holes (21) matched with the first screw holes (13) are formed in the waterproof gasket (2);

the counterweight body (3) comprises a connecting part (31) and a counterweight part (32); the connecting part (31) is in a cylindrical shape, and a first through hole (311) is arranged along the axis of the connecting part (31) and is used for placing the cable wire; a plurality of third screw holes (312) matched with the first screw holes (13) and the second screw holes (21) are formed in one bottom surface of the connecting part (31); the counterweight part (32) comprises an inner ring (321) and an outer ring (322) which are concentrically arranged, a second through hole (3211) is formed in the center of the inner ring (321), an accommodating space (323) is formed between the outer ring (322) and the inner ring (321), the lengths of the outer ring (322) and the inner ring (321) are equal, and heavy metal is placed in the accommodating space (323) and used for counterweight; one end of each of the inner ring (321) and the outer ring (322) is fixedly connected to the other bottom surface of the connecting part (31), and the other end of the outer ring (322) is provided with a first thread (3221);

one end of the tail cover (4) is a circular ring (41), and the other end of the tail cover is a hollow cone (42); the inner surface of the circular ring (41) is provided with a second thread (411) matched with the first thread (3221), the counterweight body (3) is connected with the tail cover (4) through threaded connection between the first thread (3221) and the second thread (411), and the top end of the hollow cone (42) is provided with a cable wire outlet (421) for leading out the cable wire;

the metal probe (1), the waterproof gasket (2) and the counterweight body (3) are fixedly connected together through the first screw hole (13), the second screw hole (21) and the third screw hole (312) by adopting screws, and the waterproof gasket (2) is arranged between the metal probe (1) and the counterweight body (3) and used for preventing a shell from being water;

the first through hole (311), the second through hole (3211) and the cable outlet (421) are coaxial and are communicated, and are used for arranging the cable, one end of the cable is connected with the singlechip, and the other end of the cable is led out from the cable outlet (421) through the first through hole (311) and the second through hole (3211) so as to be connected with external equipment;

the cable is connected to the computer through an RS 485-to-USB interface, and data is transmitted between the singlechip and the computer through an RS485 protocol so as to prevent the loss of the data in the long-distance transmission process;

the use principle of the underground temperature measuring instrument is as follows: acquiring temperature information of underground water by using a temperature sensor, continuously reading the temperature information by a singlechip, and periodically transmitting the acquired temperature information to an upper computer through an RS485 protocol according to a preset time interval; after receiving ten pieces of temperature information, the upper computer averages the ten pieces of temperature information, stores the average value, and displays the average value through display equipment for viewing;

the first screw hole (13), the second screw hole (21), the third screw hole (312), the first through hole (311), the second through hole (3211) and the installation gap of the tail cover (4) are internally provided with epoxy resin for internal waterproof sealing.

2. An underground temperature measuring instrument as defined in claim 1, wherein: the density of the material of the counterweight body (3) is greater than the density of water.

3. An underground temperature measuring instrument as defined in claim 1, wherein: the heavy metal is lead.

4. An underground temperature measuring instrument as defined in claim 1, wherein: the temperature sensor is a DS18B20 temperature sensor.

5. An underground temperature measuring instrument as defined in claim 1, wherein: the singlechip is an STM8 singlechip or a 51 singlechip.

6. An underground temperature measuring instrument as defined in claim 1, wherein: the external device is a computer.