CN201311311Y - Groundwater level detecting instrument - Google Patents

Abstract

The underground water level detector provided by the utility model comprises a probe, a cable and a cable length detection device and the machine, and the machine is provided with a keyboard, an MCU, a display and an alarm, and the probe, the length detection device, a keyboard, a display and the alarm are respectively connected with the The MCU is connected. The probe housing is provided with a through hole, a vent hole, a bracket and a probe, the probe is fixed on the central axis of the through hole through the bracket, the upper end of the probe is connected with the cable core through a screw, and the cable is drawn out from the through hole. The utility model groundwater level detector and its probe have the advantages of: due to the adoption of the probe for obtaining the groundwater surface detection signal and the length detection device for obtaining the water level depth signal, and the local water level depth detector with keyboard, MCU, display and alarm Display and alarm greatly improve the accuracy and automation of the measurement, the structure is simple, the use is convenient, and it is suitable for deep well water level measurement.

Description

Groundwater Level Detector

technical field

The utility model relates to a water level measuring instrument, in particular to an underground water level detector.

Background technique

At present, in places such as coal fields, in order to measure and extract groundwater, it is necessary to measure the groundwater level of deep wells with a depth of more than 1 kilometer. The method of pressure measurement is generally to measure the water depth, and the ultrasonic method is to measure the liquid level, which is not suitable for deep wells. Therefore, usually only manual methods can be used. Tie the two wires of the probe to the underground with a heavy hammer through the steel cable. When the two wires of the probe touch the water surface, the multimeter used to obtain the groundwater surface detection signal short-circuit alarms. At this time, the wires are lifted out of the ground and measured with a meter ruler. wire length. This method is simple, but when measuring deep wells, due to the large stretching of the wire, the manual measurement error is large, and the cumulative measurement error is even greater. At present, there is no detection instrument that is accurate in measurement, easy to use and can realize automatic measurement.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art and provide a groundwater level detector which is accurate in measurement, easy to use, high in automation, and can be used for measuring the water level of deep underground wells.

The groundwater level detector provided by the utility model includes:

Probes, used to obtain groundwater surface detection signals; and

Cables and cable length detection devices for tying probes downhole and obtaining water depth signals; and

This machine is used for command operation, receiving water surface detection signal and water level depth signal, display and alarm of water level depth;

Among them, the machine is equipped with a keyboard, MCU, display and alarm, and the probe, length detection device, keyboard, display and alarm are respectively connected with the MCU.

The ground water level detector of the utility model, wherein the probe comprises a housing, the housing is provided with a through hole, a probe is fixed in the through hole through a bracket, and the upper end of the probe is connected with the said probe through a screw. The cable cores are connected.

The groundwater level detector of the utility model, wherein the length detection device includes a cable winch and a wellhead bracket, wherein the cable winch is provided with a reel and a reel frame for winding the cable, and the reel frame is installed There is a cable interface for connecting with the MCU, one end of the cable is connected to the cable interface, and the other end is connected to the probe; the wellhead bracket is provided with a pulley and a pulley frame for storing and storing the cable, A photoelectric encoder disc and a signal interface for connecting with the MCU are installed on the pulley frame, and the output terminal of the photoelectric encoder disc is connected to the signal interface.

In the ground water level detector of the utility model, a base for inserting a wellhead casing is fixedly installed under the pulley frame.

In the ground water level detector of the utility model, a ground connection cable is arranged between the cable winch and the wellhead support.

In the ground water level detector of the utility model, the MCU is connected with an EEPROM memory and an LED indicator light.

The groundwater level detector of the utility model, wherein said local machine is equipped with a battery charging interface.

In the utility model of the underground water level detector, the shell and the probe are made of stainless steel, and the bracket is made of nylon.

In the groundwater level detector of the utility model, the casing is provided with a ventilation hole.

The utility model groundwater level detector and its probe have the advantages of: due to the adoption of the probe for obtaining the groundwater surface detection signal and the length detection device for obtaining the water level depth signal, and the local water level depth detector with keyboard, MCU, display and alarm The display and alarm greatly improve the accuracy and automation of the measurement, the structure is simple, the use is convenient, and it is suitable for deep well water level measurement.

Description of drawings

Fig. 1 is the block diagram of the utility model underground water level detector;

Fig. 2 is a block diagram of the MCU interface structure;

Fig. 3 is a schematic diagram of the probe signal conditioning circuit;

Fig. 4 is a schematic diagram of a photoelectric encoder disc signal conditioning circuit;

Fig. 5 is a schematic diagram of connection of the groundwater level detector of the utility model;

Fig. 6 is the structural representation of probe;

Fig. 7 is the structural representation of cable winch;

Fig. 8 is the structural representation of wellhead pulley;

Fig. 9 is a structural schematic diagram of the instrument panel of the machine;

Fig. 10 is a schematic diagram of the installation of the length detection device.

Detailed ways

The groundwater level detector is equipped with a hand cable winch, a wellhead pulley, a probe and the machine as a digital display instrument. The cable is tied downhole through the wellhead pulley, and as the cable is lowered, the instrument automatically records the depth at the same time. When the probe touches the water surface, the instrument will send out an alarm, and the water level and depth will be automatically latched and displayed at this time. In order to further elaborate the groundwater level detector of the present utility model, a more detailed description will be made below in conjunction with the embodiments.

Referring to FIG. 10 and FIG. 5 , the utility model groundwater level detector includes: a probe 10 , a cable 11 , a length detection device 12 and a local machine 20 .

Referring to FIG. 6, the probe 10 includes a housing 1 made of stainless steel. The housing 1 is provided with a through hole 5, a vent hole 9, a bracket 6 and a probe 7. The probe 7 is clamped and fixed in the through hole 5 through the bracket 6. On the central axis, the bracket 6 is made of nylon. The upper end of the probe 7 is connected with the core wire of the cable 11 through the screw 2 , and the cable 11 is drawn out from the through hole 5 .

Referring to Fig. 3, the signal conditioning circuit of the probe 10 is a comparator U2A, the negative input is an adjustable threshold level (made according to different measurement situations), the water surface detection signal S1 of the probe 10 input by the positive input is compared with it, and the comparator U2A The 2-pin output signal INT1 is connected to the MCU, its role is to isolate the waveform shaping, reduce the false positive rate, improve the reliability of the measurement and the stability of the instrument.

Referring to Fig. 10, the length detection device 12 includes a cable winch 3 and a wellhead support 8, wherein, referring to Fig. 7, the cable winch 3 is provided with a reel 31 and a reel stand 32 for winding the cable 11, and the reel stand 32 is installed with a useful One end of the cable 11 is connected to the cable interface 36 connected to the MCU, and the other end is connected to the probe 10 . Referring to Fig. 8, the wellhead support 8 is provided with a pulley 83 and a pulley frame 84 for retracting the cable 11, and a photoelectric encoder disk 87 and a signal interface 88 for connecting with the MCU are installed on the pulley frame 84, and the output of the photoelectric encoder disk 87 Terminate to signal interface 88 . A base 85 for inserting the wellhead casing 82 is fixedly installed below the pulley frame 84 .

Referring to Fig. 4, the water level and depth signal conditioning circuit of the photoelectric encoder disc 87 uses two NPN triode bases to connect the photoelectric pulse, so that the collector is pulled up to +5 volts to form an inverter, which is finally sent to the MCU after conditioning by the TTL logic circuit. Its function is the function of level conversion and buffer filtering, and has a certain isolation effect, which effectively protects the internal circuit of the instrument and makes it stable and normal. The photoelectric encoder disk is powered by +12 volts.

Referring to FIG. 2 , it is the structure of the MCU interface, which is a traditional technology, and will not be described in detail.

Referring to Fig. 1, this machine 20 is provided with keyboard 21, MCU, display 23 and alarm 24, and this machine 20 is equipped with battery 30 and charging interface 34 (referring to Fig. 9 ) and LED indicator light 26. Referring to FIG. 2 , the cable interface 36 of the probe 10 signal, the signal interface 88 of the photoelectric encoder disk 87 , the keyboard 21 , the display 23 and the alarm 24 are respectively connected with the MCU. The MCU is connected with an EEPROM memory 25 .

Referring to FIG. 10 , a ground connection cable 27 is provided between the cable winch 3 and the wellhead support 8 . Because the water level depth is proportional to the cable 11 in the wellhead pulley, the pulse number of the photoelectric encoder disc 87 is proportional to the depth. At the moment when the probe touches the water surface, the probe and the probe shell form a loop and send out a signal, and the MCU receives and records the water surface detection signal and the water level depth signal to display and alarm the water level depth. Alarm 24 is a sound alarm installed inside the instrument. The local panel as a digital display instrument is shown in Figure 9.

The installation and working process of the groundwater level detector of the present utility model are illustrated below. See Figure 10:

1. Insert the wellhead pulley base into the ground wellhead casing, and fix the drawworks on the ground 2 meters away from the wellhead pulley. The probe bypasses the wellhead pulley and is vertically tied into the well through the inserting sleeve.

2. Insert the depth record of the detector and the depth record jack of the wellhead pulley in one-to-one correspondence, and plug in the water level mark of the winch and the water level mark socket of the detector in one-to-one correspondence.

3. There is a 2-meter mark at a distance of 2 meters from the cable to the probe. When lowering the probe, align the 2-meter mark with the zero point of the wellhead, and 2 meters is the starting depth. That is to say, the probe has been lowered by 2 meters, and the depth is counted from 2 meters.

4. Turn on the power, and the hand winch lowers the cable at an even speed. At this time, the instrument is lowered along with the cable, and the depth is automatically recorded. When the probe touches the water surface, the instrument emits a "beep-beep-beep" alarm sound, and at the same time the LED indicates Lamp 26 is bright, and expression probe has entered water, and instrument is with the numerical value latch of water level depth at this moment, can read the water level latch value.

The operation and use method of the groundwater level detector of the present utility model is described in detail below.

1. "0" point setting:

Referring to Figure 9, the depth is recorded by driving the photoelectric encoder disc through the wellhead pulley. In the process of lowering the cable, the speed should be uniform, and the cable should be in good contact with the pulley without slipping. In order to lower the cable smoothly, a mark was made at a distance of 2 meters from the probe, that is to say, the depth record "0" point is 2 meters. Call 2 meters as the initial depth, and the initial depth can be set arbitrarily. Turn the "Setting/Measurement" switch to "Settings", press the "Parameter" key to display

Indicates that the "0" mark is 2 meters, that is to say, the depth is recorded from 2 meters, if it is recorded from 3 meters, then this number is set to 3 meters, and the depth is recorded from 3 meters.

2. Starting depth and depth coefficient setting:

Step 1: Turn the "Setting/Measurement" switch to the "Setting" position, press the "Parameter" button, the digital tube to be set will flash, and each time you press the "Parameter" button, the digital tube will move one bit to the right, and press "Up, Down" ” key to adjust the number. For example, if the initial depth is set to 2 meters, it will display

Step 2: Continue to press the "Parameter" key, the display

It has been set to 4000 at the factory, and 4000 is the depth coefficient, do not change it.

Step 3: Set the position of the decimal point and display

The rightmost digital tube is 2, which means 2 decimal places after the decimal point. If it is set to 3, it means 3 decimal places after the decimal point.

It is generally designed that the corresponding coefficient value is 4000 for one revolution of the wellhead pulley.

If the pulley is worn for a long time and the measurement accuracy exceeds the error range, the error correction can be realized by changing the depth coefficient.

3. Instrument display

When the instrument is in measurement state, there are 4 parameters displayed in the window, the parameter number is displayed in the left window, and the parameter value is displayed in the right window.

Parameter No. 1: Display the depth of the cable lowering, the depth is counting up and down, counting up when lowering, and counting down when lifting up.

Parameter No. 2: Displays the depth value when the probe touches the water surface, that is, the water level value. The depth value is latched when the probe touches the water surface. No matter whether the probe continues to be lowered, the water level value at this time will not change, so that it can be transcribed manually.

Parameter No. 3: It shows the recorded value of "0" point. If the cable has been lowered for 2 meters, the 2-meter mark is the recorded value of "0" point, which is called the initial depth.

Parameter No. 4: Display the depth coefficient value. When the instrument leaves the factory, it is set to 4000.

When the probe touches the water surface, the instrument sends out a "beep-beep-beep" alarm sound. At this time, the LED indicator 26 is on, indicating that the probe has entered the water. Press the "Parameter" button to display the No. 2 parameter, which is the water level value. Press the "Up" key to remove the alarm sound, and the LED indicator light 26 goes out. Be careful not to press the "reset" button. If you press the "reset", the latched water level value and the depth value of parameter No. 1 will be eliminated. Only press the "reset" button after aligning the "0" point when starting to lower the cable. The LED indicator light 26 was extinguished when the probe went out of the water.

The instrument can run continuously for 48 hours. When the power switch is turned on, the instrument will emit a continuous alarm sound, indicating that the instrument is low in power and must be charged. When using the local charging interface 43, the red plug of the charger is connected to the "+" pole of the panel power supply, and the black plug is connected to "" -" pole, the indicator light of the charger is red, and when the indicator light turns green, it means full.

The above-mentioned embodiment is only to describe the preferred implementation of the utility model, not to limit the concept and scope of the utility model. The various modifications and improvements made in the technical solution should fall within the scope of protection of the utility model, and the technical content claimed in the utility model has been fully recorded in the claims.

Claims (9)

1. underground water table detection instrument is characterized in that: comprising:

Probe (10) is used to obtain the ground water level detection signal; And

The device for detecting length (12) of cable (11) and described cable (11) is used for described probe (10) is lain in the down-hole and obtains the water level depth signal; With

This machine (20) is used for the demonstration and the warning of instruction manipulation, reception water surface detection signal and water level depth signal, water level depth;

Wherein, described machine (20) is provided with keyboard (21), MCU, display (23) and alarm (24), and described probe (10), device for detecting length (12), keyboard (21), display (23) and alarm (24) link to each other with described MCU respectively.

2. according to the underground water table detection instrument of claim 1, it is characterized in that: wherein said probe (10) comprises housing (1), described housing (1) is provided with through hole (5), be fixed with probe (7) by support (6) in described through hole (5), the upper end of described probe (7) is connected with described cable (11) heart yearn by screw (2).

3. according to the underground water table detection instrument of claim 1 or 2, it is characterized in that: wherein said device for detecting length (12) comprises reel truck (3) and browpiece (8), wherein, described reel truck (3) is established and is useful on reel (31) and the reel stand (32) of Chan around described cable (11), be equipped with on the described reel stand (32) and be used for the cable interface (36) that is connected with described MCU, one end of described cable (11) links to each other with described cable interface (36), and the other end links to each other with described probe (10); Described browpiece (8) is provided with pulley (83) and the pulley yoke (84) that is used for the described cable of folding and unfolding (11), photoelectric coded disk (87) and the signaling interface (88) that is used for being connected with described MCU are installed on the described pulley yoke (84), and the output terminal of described photoelectric coded disk (87) is connected to described signaling interface (88).

4. according to the underground water table detection instrument of claim 3, it is characterized in that: wherein said pulley yoke (84) below is installed with base (85).

5. according to the underground water table detection instrument of claim 4, it is characterized in that: be provided with ground wire stube cable (27) between wherein said reel truck (3) and the browpiece (8).

6. according to the underground water table detection instrument of claim 5, it is characterized in that: wherein said MCU is connected with eeprom memory (25) and LED light (26).

7. according to the underground water table detection instrument of claim 6, it is characterized in that: wherein said machine (20) is equipped with battery charge interface (34).

8. according to the underground water table detection instrument of claim 2, it is characterized in that: wherein said housing (1) and probe (7) adopt stainless steel to make, and described support (6) adopts nylon to make.

9. underground water table detection instrument according to Claim 8, it is characterized in that: wherein said housing (1) is provided with air hole (9).

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