CN210037000U - Sensor and measuring device - Google Patents
Sensor and measuring device Download PDFInfo
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- CN210037000U CN210037000U CN201921187289.7U CN201921187289U CN210037000U CN 210037000 U CN210037000 U CN 210037000U CN 201921187289 U CN201921187289 U CN 201921187289U CN 210037000 U CN210037000 U CN 210037000U
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- temperature sensing
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Abstract
The utility model is suitable for a temperature measurement field provides a sensor and measuring device. The sensor is from last to being weight bar, fixed cover and fender mud piece down in proper order, the weight bar is inside to have the through hole along length direction, install conductive electrode in the fixed cover, the inside cavity of fender mud piece just inwards is formed with the notch from circumference, conductive electrode bottom is deep extremely in the fender mud piece, still install temperature sensing module in the lateral wall of fixed cover. The utility model arranges the conductive electrodes in the sensor, judges whether the sensor enters the well water by detecting the resistance value change between the conductive electrodes, and records the length of the signal cable by combining the meter counter, thereby obtaining the depth data of the sensor in the well water and overcoming the manual calibration error; in addition, the mud blocking block is sleeved at the bottom of the conductive electrode, so that the conductive electrode can be effectively prevented from being collided by large silt fine blocks.
Description
Technical Field
The utility model belongs to the technical field of the temperature measurement, especially, relate to a sensor and measuring device.
Background
In recent years, with the great investment of China in urban infrastructure and the planning and engineering investigation implementation of various rail transit, core sampling needs to be carried out by underground drilling inevitably, and gradient measurement can be carried out on the well water temperature.
Under general conditions, the well temperature and the well depth basically form a step-type stable relationship, the well temperature is warm in winter and cool in summer along with the change of seasons, and meanwhile, the irregular change of the temperature is abnormal due to the communication between the exploration holes and the pores of nearby lakes. By combining temperature measurements with other methods, the flow, water cut and flow direction conditions of the fluid inside and outside the well can be determined. However, in a field construction environment, the water quality of well water is often accompanied by substances such as mud, so that the water body is not clear enough, and the water depth of the temperature sensor needs to be marked while temperature measurement is carried out. And traditional water level measurement adopts ceramic pressure sensor to go on, because quality of water reason, through conventional water level measurement carry on that the depth of water monitoring room can't realize, consequently generally adopt artifical demarcation to roughly survey measuring transducer's the degree of depth of intaking, cause the inaccurate and difficult scheduling problem of site operation of degree of depth ration easily. In order to solve the problems, a measuring device is needed to be designed, the measuring device can be applied to various water quality environments, can automatically measure and record the temperature and the water inlet depth of the sensor, is convenient for field construction and ensures accurate measurement.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide a sensor and a measuring device, which are intended to solve the above problems.
The utility model adopts the following technical scheme:
on the one hand, the sensor is from last to being weight bar, fixed cover and fender mud piece down in proper order, there is the through hole weight bar inside along length direction, install conductive electrode in the fixed cover, the inside cavity of fender mud piece just inwards is formed with the notch from circumference, conductive electrode bottom is deep extremely in the fender mud piece, still install temperature sensing module in the lateral wall of fixed cover, conductive electrode and temperature sensing module's signal cable passes draw forth from the weight bar top behind the through hole.
Furthermore, the fixing sleeve is divided into an upper part, a middle part and a lower part, wherein the upper part is inwards provided with a mounting groove with a certain depth, the mounting groove extends downwards to the middle part of the fixing sleeve, the back surface of the mounting groove is provided with a wire hole communicated to the inside of the fixing sleeve, a support is arranged in the mounting groove, the temperature sensing module is arranged on the support, and a signal cable of the temperature sensing module penetrates through the wire hole to enter the through hole.
Furthermore, a shallow groove is formed in the support from the outer surface to the inside, the temperature sensing module is located in the shallow groove, a wire groove penetrating through the thickness direction of the support is formed in the shallow groove upwards, and a signal cable of the temperature sensing module enters the through hole through the wire groove and the wire hole.
Furthermore, the lower part of the fixed sleeve is in threaded connection with the mud blocking block.
Furthermore, the upper part of the fixed sleeve is connected with the counterweight rod through a snap ring.
Furthermore, the connecting positions of the clamping ring, the counterweight rod and the fixing sleeve and the connecting positions of the counterweight rod and the mud blocking block are provided with sealing rings.
Furthermore, waterproof joints are arranged at the tops of the through holes, and the signal cables and the tops of the through holes are sealed through the waterproof joints.
On the other hand, measuring device includes the sensor still includes measurement host computer, drum and meter rice ware, the signal cable of sensor is walked around be connected to behind the drum measurement host computer, meter rice ware with the drum linkage, meter rice ware is connected to the measurement host computer.
Further, the measurement host computer includes the power module for measurement host computer and sensor power supply, still includes microprocessor and the AD collector, liquid crystal control circuit, keyboard control circuit and the data storage circuit who is connected with microprocessor, meter rice ware is connected to microprocessor, electrically conductive electrode and temperature sensing module pass through the signal cable is connected to the AD collector.
The utility model has the advantages that:
1. the method comprises the steps that conductive electrodes are arranged in a sensor, whether the sensor enters well water is judged by detecting resistance value changes between the conductive electrodes, the length of a signal cable is recorded by combining a meter counter, further depth data of the sensor in the well water is obtained, and manual calibration errors are overcome;
2. the mud blocking block is designed to be sleeved at the bottom of the conductive electrode, so that the conductive electrode can be effectively prevented from being collided by large silt fine blocks;
3. the sensor adds the weight lever, even contain silt in the well, can not lead to the sensor can't sink into the shaft bottom and then can't realize normal measurement yet.
Drawings
Fig. 1 is a cross-sectional view of a sensor provided by an embodiment of the present invention;
fig. 2 is a diagram of a sensor structure according to an embodiment of the present invention;
fig. 3 is an exploded view of a sensor provided by an embodiment of the present invention;
figure 4 is a structural view of the pouch;
FIG. 5 is a block diagram of a stand;
fig. 6 is a system structure diagram of a measuring device provided in an embodiment of the present invention;
fig. 7 is a schematic diagram of a measuring device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
The first embodiment is as follows:
as shown in fig. 1-3: the sensor that this embodiment provided is from last to being weight lever 1, fixed cover 2 and fender mud piece 3 down in proper order, there is through hole 11 weight lever 1 is inside along length direction, install conductive electrode 21 in fixed cover 2, 3 inside cavities of fender mud piece and inwards being formed with notch 31 from circumference, conductive electrode 21 bottom is deep extremely in fender mud piece 3, still install temperature sensing module (not shown in the figure) in the lateral wall of fixed cover 2, conductive electrode 21 and temperature sensing module's signal cable passes draw forth from weight lever 1 top behind through hole 11.
In the practical application process, the sensor needs to be immersed into water to a depth of tens of meters to hundreds of meters, so the waterproof sealing performance of the sensor is quite high, and the fewer devices in the sensor, the higher the waterproof stability and reliability. In view of this, in the measurement sensor, only the temperature sensing module and the conductive electrode will be installed. In this structure, the temperature sensing module adopts for T100 platinum resistance, is located the lateral wall of fixed cover, can be better carry out temperature-sensing and heat transfer. The conductive electrode is positioned at the bottom of the sensor, is specifically arranged in the fixed sleeve, and the bottom of the conductive electrode extends into the mud blocking block, so that the conductive electrode can be firstly sensed when the sensor is initially immersed in water. When the sensor is put into water, the resistance value between the conductive electrodes is changed greatly, and is changed from the original off state to a micro-on state, and the state is detected and used as a standard for judging whether the sensor is immersed in water.
Because the water body is generally turbid in the job site well, in order to prevent that the conductive electrode is collided by the large silt nubbles, the embodiment designs a mud guard block sleeved at the bottom of the conductive electrode. Because the sensor is deeply immersed into the well, the deeper the sensor is, the larger the buoyancy is, particularly in a well containing silt, the measuring sensor can not be immersed into the well bottom, and thus normal measurement can not be realized. Therefore, when designing the sensor, the counterweight condition of the sensor needs to be considered, and the counterweight rod of the sensor can be designed by about 8 jin according to the practical application of field engineering. In addition, waterproof joints 12 are arranged at the tops of the through holes 11, and the signal cables of the conductive electrodes and the temperature sensing module are sealed with the tops of the through holes through the waterproof joints, so that the waterproof sealing performance of the sensor is improved.
Specifically, the PT100 platinum resistor is a microminiature platinum resistor of Germany Heley company with the model number of BD-M213, and has the characteristics of small volume, high precision, fast reaction, good long-term stability and the like. The PT100 platinum resistor has a selected temperature precision grade F of 0.15, a type A and a temperature coefficient TCR of 0.003851, and has a resistance value of 100 omega at a temperature of 0 ℃ and a measurement range of-50-300 ℃. The PT100 platinum resistor self-sensor is connected with the measurement host machine through a four-wire system, wherein two wires are used for supplying power to the constant current source, the other two wires are used for measuring the voltage at two ends of the PT100 platinum resistor, the four-wire system can effectively eliminate the influence caused by the wiring resistor, and the measurement precision is improved.
As a specific structure of the fixing sleeve 2, as shown in fig. 4, the fixing sleeve 2 is divided into three parts, namely, an upper part, a middle part and a lower part, wherein the upper part is internally provided with a mounting groove 22 with a certain depth, the mounting groove 22 extends downwards to the middle part of the fixing sleeve, the middle of the fixing sleeve is thick, and two ends of the fixing sleeve are thin. The back of the mounting groove 22 is provided with a wire hole 23 communicated to the inside of the fixing sleeve, a support 5 (as shown in fig. 5) is mounted in the mounting groove, the temperature sensing module is mounted on the support 5, and a signal cable of the temperature sensing module passes through the wire hole 23 and enters the through hole. Specifically, the bracket 5 is provided with a shallow groove 51 from the outer surface to the inside, the temperature sensing module is located in the shallow groove 51, a wire groove 52 penetrating through the thickness direction of the bracket is formed upwards in the shallow groove 51, and a signal cable of the temperature sensing module enters the through hole through the wire groove 52 and the wire hole 23. After the support is inserted into the mounting groove of the fixing sleeve, at least part of the shallow groove of the support is positioned in the middle part of the fixing sleeve, and the temperature sensing module in the shallow groove is in close contact with the sleeve wall of the middle part of the fixing sleeve, so that temperature sensing and heat transfer can be better performed.
In this embodiment, the parts are detachably connected. The lower part of the fixed sleeve 2 is in threaded connection with the mud blocking block 3. The upper part of the fixed sleeve 2 is connected with the counterweight rod 1 through a snap ring 4. The upper part of the fixed sleeve 2 and the lower part of the counterweight rod 1 are both provided with a circle of ring grooves, and the upper end and the lower end of the snap ring are clamped into the ring grooves on the corresponding sides and are tightly connected. In addition, the connecting position of the clamping ring, the counterweight rod and the fixed sleeve and the connecting position of the counterweight rod and the mud blocking block are respectively provided with a sealing ring, and the mounting positions of the conductive electrode and the fixed sleeve can also be provided with the sealing rings so as to enhance the waterproof performance.
Example two:
the embodiment provides a measuring device, as shown in fig. 6, including the sensor 100, further including a measuring host 200, a drum 300, and a meter 400, where a signal cable of the sensor 100 is connected to the measuring host 200 after passing around the drum 300, the meter 400 is linked with the drum 300, and the meter 400 is connected to the measuring host 200.
Specifically, as shown in fig. 7, the measurement host 200 includes a power module 201 for supplying power to the measurement host and the sensor, and further includes a microprocessor 202, and an AD collector 203, a liquid crystal control circuit 204, a keyboard control circuit 205, and a data storage circuit 206 connected to the microprocessor, the meter 400 is connected to the microprocessor 202, and the conductive electrode and the temperature sensing module are connected to the AD collector 203 through the signal cable. The data storage circuit comprises a ferroelectric memory, the liquid crystal control circuit comprises an OLED liquid crystal display screen, and the microprocessor is STM32F101RBT6 in model number. The power supply module comprises a constant current source, the constant current source supplies power to a PT100 platinum resistor through a signal cable by a measuring host, a MAX6126-25 reference voltage chip is adopted to provide a high-precision reference voltage of 2.5V, the high-precision reference voltage is used as a reference input voltage of a high-precision voltage-current chip XTR111, and a sampling resistor R1 is 1000 omega, so that a constant current I is Vref/R1 is 2.5 mA. When the ambient temperature is 0 ℃, the voltage VT between two ends of PT100 PT resistor is 2.5mA 100 Ω 250mV, and the exact corresponding relation between the resistance change and the temperature can be obtained by looking up the table and according to the temperature coefficient of BD-M213.
The working process is as follows: and starting a power switch, entering an automatic initialization state, initially zeroing each variable, and simultaneously performing liquid crystal synchronous display. After initialization is completed, an electrode measurement self-checking state is entered, whether voltage is generated or not is acquired through AD (analog-to-digital) of the output of the conductive electrode measurement circuit, whether the sensor enters water or not is judged according to the voltage, and if the voltage is judged, software of the meter counter is set to be zero. And starting temperature measurement and simultaneously measuring the paying-off length of the cable, selecting whether to store the current temperature and the water depth according to needs when temperature data is stable, and after the storage and measurement are finished, replying the measurement state, and continuously measuring the paying-off length by the meter counter on the basis of the previous measurement.
The measurement host is used for AD acquisition and meter counter control. In the process of placing the sensor in the well, the meter counter automatically measures the signal transmission cable. When the sensor is placed in water, the resistance value between the conductive electrodes is changed greatly, the original off state is changed into a micro-on state, the state is detected and is used as a standard for judging whether the sensor enters the water, the measured value of the meter is used as a 0m value of the current water level depth, the STM32F101RBT6 microprocessor carries out software zeroing processing on the measured value of the meter, when the sensor continues to sink into the water, the STM32F101RBT6 microprocessor carries out measurement on the basis of the water level depth zeroing, and meanwhile, the current temperature measured value and the cable winding and unwinding length are displayed in an OLED liquid crystal display screen in real time. And controlling whether the current measurement data is stored in the ferroelectric memory or not through a keyboard. When the whole measurement work is finished, the previously stored temperature and depth data information can be searched through the keyboard index and displayed in the OLED.
The embodiment adopts the meter counter to measure and calculate the absolute displacement of the signal cable, and has the advantages of strong anti-interference capability, high design precision, high reliability, convenient use, clear reading and the like. The electronic meter counter with the model number of ATK72 is selected, the measuring length and the length control range are 00000.0-99999.9 meters, the display measuring precision unit is millimeter, centimeter, decimeter and meter, and the counter bidirectional meter counter can be carried out. When the signal cable is wound and unwound, the metering wheel rotates forwards or reversely to promote the counting value to increase or decrease, after power supply is stopped accidentally, the current counting value keeps the counting state value before power failure, and after power supply is recovered, the state before power failure continues to work. The main core component of the meter counter is an incremental encoder S3806G-360B, the displacement of the cable is converted into a periodic electric signal, and then the electric signal is converted into counting pulses, and the number of the pulses is used for representing the size of the displacement. Incremental encoders have A, B and Z signal pulse outputs, of which A, B are used to read the calculated rotational angle, respectively. When the A signal is 90 degrees ahead of the B signal, the wire coil is in a positive rotation direction, and when the A signal is 90 degrees behind the B signal, the wire coil is in a negative rotation direction. The Z signal pulse output is used to count the number of turns of the coil. In practical application, only the rotation angle and the rotation direction need to be confirmed, so that the signal A and the signal B are mainly subjected to pulse counting, and a pull-up resistor needs to be connected due to open-drain output.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A sensor, characterized by: the sensor is from last to being weight bar, fixed cover and fender mud piece down in proper order, the weight bar is inside to have the through hole along length direction, install conductive electrode in the fixed cover, the inside cavity of fender mud piece just inwards is formed with the notch from circumference, conductive electrode bottom is deepened extremely in the fender mud piece, still install temperature sensing module in the lateral wall of fixed cover, conductive electrode and temperature sensing module's signal cable passes draw forth from the weight bar top behind the through hole.
2. The sensor of claim 1, wherein: the fixing sleeve is divided into an upper part, a middle part and a lower part, wherein the upper part is inwards provided with a mounting groove with a certain depth, the mounting groove extends downwards to the middle part of the fixing sleeve, the back surface of the mounting groove is provided with a wire hole communicated to the inside of the fixing sleeve, a support is arranged in the mounting groove, the temperature sensing module is arranged on the support, and a signal cable of the temperature sensing module passes through the wire hole and enters the through hole.
3. The sensor of claim 2, wherein: the bracket is internally provided with a shallow groove from the outer surface, the temperature sensing module is positioned in the shallow groove, a wire groove penetrating through the thickness direction of the bracket is upwards formed on the shallow groove, and a signal cable of the temperature sensing module enters the through hole through the wire groove and the wire hole.
4. The sensor of claim 3, wherein: the lower part of the fixed sleeve is in threaded connection with the mud blocking block.
5. The sensor of claim 3, wherein: the upper part of the fixed sleeve is connected with the counterweight rod through a snap ring.
6. The sensor of claim 5, wherein: and sealing rings are arranged at the connecting positions of the clamping ring, the counterweight rod and the fixing sleeve and the connecting positions of the counterweight rod and the mud blocking block.
7. The sensor of any one of claims 1-6, wherein: and the top of the through hole is provided with a waterproof connector, and the signal cable and the top of the through hole are sealed through the waterproof connector.
8. A measuring device, characterized in that the measuring device comprises the sensor according to any one of claims 1 to 7, and further comprises a measuring host, a wire coil and a meter counter, wherein a signal cable of the sensor is connected to the measuring host after passing through the wire coil, the meter counter is linked with the wire coil, and the meter counter is connected to the measuring host.
9. The measuring device of claim 8, wherein the measuring host comprises a power supply module for supplying power to the measuring host and the sensor, and further comprises a microprocessor, and an AD collector, a liquid crystal control circuit, a keyboard control circuit and a data storage circuit which are connected with the microprocessor, wherein the meter counter is connected to the microprocessor, and the conductive electrode and the temperature sensing module are connected to the AD collector through the signal cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921187289.7U CN210037000U (en) | 2019-07-26 | 2019-07-26 | Sensor and measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921187289.7U CN210037000U (en) | 2019-07-26 | 2019-07-26 | Sensor and measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210037000U true CN210037000U (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921187289.7U Expired - Fee Related CN210037000U (en) | 2019-07-26 | 2019-07-26 | Sensor and measuring device |
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| Country | Link |
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| CN (1) | CN210037000U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048943A (en) * | 2021-03-16 | 2021-06-29 | 中国电建集团成都勘测设计研究院有限公司 | Equipment and method for rapidly measuring water surface elevation in complex flow state |
| CN113358190A (en) * | 2021-05-31 | 2021-09-07 | 天水华天传感器有限公司 | Water alarm liquid level transmitter |
-
2019
- 2019-07-26 CN CN201921187289.7U patent/CN210037000U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048943A (en) * | 2021-03-16 | 2021-06-29 | 中国电建集团成都勘测设计研究院有限公司 | Equipment and method for rapidly measuring water surface elevation in complex flow state |
| CN113358190A (en) * | 2021-05-31 | 2021-09-07 | 天水华天传感器有限公司 | Water alarm liquid level transmitter |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200207 Termination date: 20200726 |
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| CF01 | Termination of patent right due to non-payment of annual fee |