CN117824864A - Handheld digital display detector for simultaneously detecting temperature and depth of liquid or material pile - Google Patents
Handheld digital display detector for simultaneously detecting temperature and depth of liquid or material pile Download PDFInfo
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- CN117824864A CN117824864A CN202311106819.1A CN202311106819A CN117824864A CN 117824864 A CN117824864 A CN 117824864A CN 202311106819 A CN202311106819 A CN 202311106819A CN 117824864 A CN117824864 A CN 117824864A
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- stainless steel
- depth
- probe rod
- steel probe
- temperature
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- 239000007788 liquid Substances 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 title claims abstract description 19
- 239000000523 sample Substances 0.000 claims abstract description 38
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 33
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 32
- 239000010935 stainless steel Substances 0.000 claims abstract description 32
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 13
- 238000007747 plating Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 abstract description 36
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000003245 coal Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/26—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring depth
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
- G01F23/72—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means
- G01F23/74—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means for sensing changes in level only at discrete points
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention relates to a handheld digital display detector for simultaneously detecting the temperature and depth of liquid or material piles, which comprises a hollow stainless steel probe rod (8) and a nickel plating dial plate (2) connected with the probe rod, wherein an STM32 singlechip and an OLED display module (3) are arranged in the nickel plating dial plate, a circuit board assembly is arranged in the stainless steel probe rod, a magnetic reed switch array circuit, a resistance and depth conversion circuit and a resistance voltage conversion circuit which are sequentially connected are arranged in the circuit board assembly, the resistance voltage conversion circuit is connected to the STM32 singlechip, and a temperature sensor (10) is arranged at the bottom of the stainless steel probe rod and is electrically connected with the resistance voltage conversion circuit; a magnetic sleeve (9) sleeved on the stainless steel probe rod is in connection fit with the magnetic reed switch to indicate the depth of the stainless steel probe rod. The beneficial effects of the invention are as follows: the device can realize simultaneous detection of the liquid levels or the depths and the temperatures of the piled articles, and effectively widens the limitation of detection media. Meanwhile, the invention has simple structure, convenient operation and lower manufacturing cost.
Description
Technical Field
The invention relates to the field of sensors, in particular to a portable detection device for simultaneously detecting the temperature and the depth of liquid or a material pile in a contact mode.
Background
The liquid or material pile temperature detection and the depth detection are two physical quantities which must be detected and controlled in the fields of petrochemical industry, food production and the like. In daily life and production practice, the situation that the temperature distribution is different under different depths is unavoidable, and how to obtain the temperature information while obtaining the current measuring medium depth, which puts a new requirement on the sensor detection device. For the contact temperature and depth detection devices commonly used in the market at present: the contact type temperature detection device, such as a hand-held probe type digital display thermometer, is used for measuring the temperature value of materials such as liquid, material piles, vinasse and the like, and can not detect the depth of the material although the thermometer realizes the functions of temperature detection and real-time digital display of the materials and has higher precision and sensitivity; the contact type liquid level detection device, such as a glass tube liquid level meter, has the defects of poor definition, limited measurement temperature, easy breakage of a tube body and the like. Compared with the traditional glass tube liquid level meter, the plate type contact liquid level meter has high temperature resistance, corrosion resistance, high measurement accuracy, higher reliability and practicability, but high price and no support for a digital display function.
At present, the research of portable detection devices of temperature and depth is mainly focused on the aspects of precision, sensitivity and the like of temperature detection, and the research of simultaneous detection of two physical quantities is very little.
Chinese patent publication No. CN203053590U, publication No. 2013-07-10 discloses a detection device for measuring liquid temperature and liquid level simultaneously, which comprises a control board and a circuit board which are arranged together, and a waterproof sleeve is used for wrapping outside. Wherein, be equipped with controller and power supply circuit on the control panel, install temperature sensor and evenly distributed's the capacitive device of detected temperature on the circuit board. In the detection process, the controller realizes liquid level depth detection by judging capacitance value change brought by liquid depth. The detection device realizes waterproofness and convenience, but has high price and unstable detection result. Chinese patent (publication No. CN112483216A, publication No. 2021-03-12) discloses a sensor device for simultaneously detecting the liquid level and the temperature of engine oil, which integrates two functions of the liquid level and the temperature of engine oil of a vehicle onto one sensor to realize the function assembly, but the use environment of the sensor device is limited.
Disclosure of Invention
In order to meet the requirements of simultaneous detection and digital display of temperature and depth under the background technology, aiming at the technical defects of single detection function and limited use environment of the detection device in the market at the present stage, the detection device provided by the invention solves the defects existing under the technical background and provides a portable detection device for simultaneously detecting the temperature and the depth physical quantity of liquid or a material pile.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a handheld digital display detector for simultaneously detecting the temperature and the depth of a liquid or a material pile is characterized in that: the measuring device comprises a hollow stainless steel probe rod, wherein the upper end of the stainless steel probe rod is connected with a nickel plating dial plate, an STM32 singlechip and a connected OLED display module are arranged in the nickel plating dial plate, and the STM32 singlechip converts measuring signals and drives the OLED display module to display depth and temperature information;
the stainless steel probe rod is internally provided with a circuit board assembly, a magnetic reed switch array circuit, a resistance value and depth conversion circuit and a resistance voltage conversion circuit which are sequentially connected are arranged in the circuit board assembly, the resistance voltage conversion circuit is connected to an STM32 singlechip in the nickel plating dial plate through a cable assembly, and the bottom of the stainless steel probe rod is provided with a temperature sensor which is electrically connected with the resistance voltage conversion circuit through a cable;
the stainless steel probe rod is sleeved with a freely sliding magnetic sleeve, and the magnetic sleeve slides to a position near one magnetic reed switch in the magnetic reed switch array circuit and forms a connection fit with the magnetic reed switch to indicate the depth of the stainless steel probe rod.
On the basis of the technical scheme, the following further technical scheme is provided:
the upper end of the stainless steel probe rod is in threaded connection with a threaded connector arranged at the lower end of the nickel plating dial plate.
The magnetic reed switch array circuit comprises a group of resistors which are connected in series and arranged at intervals, two ends of each resistor are respectively connected with one end of one magnetic reed switch, the input end of the first resistor is used as one end of the magnetic reed switch array circuit, and the other ends of all the magnetic reed switches are connected in parallel and then used as the other end of the magnetic reed switch array circuit.
An end plate is arranged at the bottom of the stainless steel probe rod to seal the temperature sensor in the stainless steel probe rod.
When the stainless steel probe rod is inserted into a material pile or liquid, the magnetic sleeve plays a role of a pontoon and moves to a certain position, and when the magnetic sleeve is influenced by a magnetic field generated by the magnetic sleeve (pontoon), the normally open magnetic spring switch at the sleeve covering position is attracted, a related circuit forms a passage after the magnetic spring switch is closed, an acquired voltage signal is converted into depth and temperature information at the position after being processed by the STM32 singlechip and displayed on the OLED display screen, and the magnetic sleeve (pontoon) has the characteristics of corrosion resistance, high temperature resistance and the like so as to adapt to various measuring mediums.
The beneficial effects of the invention are as follows: 1. the detection of the liquid level or the depth of the material pile and the temperature signal are taken into account, so that the widening of detection media or environment is realized; 2. the invention can meet the chemical characteristics of high temperature resistance and corrosion resistance, and has wider adaptability to detection environment; 3. the hand-held operation design and digital display function, the operation process is simple and convenient, and the measurement result is visual and clear. The invention can realize simultaneous detection of various liquid levels or depths and temperatures of piled articles, and effectively widens the limitation of detection media. Meanwhile, the invention has simple structure, convenient operation and lower manufacturing cost.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic diagram of a handheld digital display detector;
FIG. 2 is a schematic block diagram of a detection circuit;
FIG. 3 is a schematic diagram of a connection between a reed switch for depth detection and a resistor;
FIG. 4 is a graph of temperature versus resistance;
FIG. 5 is a schematic diagram of a resistor-to-depth conversion circuit;
FIG. 6 is a schematic diagram of a resistance-temperature conversion circuit;
fig. 7 is a schematic diagram of an STM32 monolithic circuit.
Detailed Description
As shown in fig. 1, the handheld digital display detector for simultaneously detecting the temperature and the depth of liquid or material piles comprises a holding rubber handle 1, a nickel plating dial plate 2, an OLED display screen display module 3, an instrument detection switch 5, a temperature unit switching button 6, a threaded movable joint 7, 201, a stainless steel probe rod 8, a magnetic sleeve (pontoon) 9 and a tail detection probe 10, wherein the upper part of the OLED display screen display module 3 displays the temperature, and the lower part displays the depth.
The nickel plating dial plate 2 is connected with a 201 stainless steel probe rod 8 through a threaded movable joint 7, a rubber gasket is crimped in the threaded movable joint to seal, a temperature sensor 10 is arranged at the tail of the 201 stainless steel probe rod 8, and an end plate 10a is arranged at the lower end of the stainless steel probe rod to seal the temperature sensor in the stainless steel probe rod. The friction coefficient of the inner surface of the magnetic sleeve 9 functioning as a pontoon is small, and the magnetic sleeve can move on the stainless steel probe rod at will.
As shown in fig. 1 and 2, the circuit board assembly 4 is disposed inside the stainless steel probe rod, and is a core component for realizing simultaneous detection of the liquid level or the temperature and depth of the material pile. The circuit board assembly comprises a magnetic reed switch array circuit and a connected resistance value depth conversion circuit, and further comprises a resistance value temperature conversion circuit, one end of which is connected with a temperature sensor, which are known technologies (namely, a series circuit resistance voltage division principle is shown in fig. 5 and 6), the other ends of the resistance value depth conversion circuit and the resistance value temperature conversion circuit are connected with a resistance voltage conversion circuit, the resistance voltage conversion circuit is connected with an STM32 singlechip, and the STM32 singlechip and the peripheral equipment thereof are shown in fig. 7. The resistance value depth conversion circuit, the resistance value temperature conversion circuit and the resistance voltage conversion circuit are connected, and the STM32 singlechip is a conventional technology in the field.
As shown in part b of fig. 3, the reed switch array circuit includes a series-connected and spaced resistors R1, R2, R3 … … Rn, each connected at two ends to a reed switch (G 1 G 2 G 3 …G n ) The input end of the first resistor R1 is used as one end of the reed switch array circuit, and the other ends of all the reed switches are connected in parallel and then used as the other end of the reed switch array circuit.
As shown in part a of FIG. 3, when the magnetic sleeve 9 moves along the probe rod to the vicinity of one of the reed switches, the reed switch will close under the influence of the magnetic force of the magnetic sleeve
The nickel plating dial plate 2 comprises a cable led out by a circuit board assembly, an OLED display module 3, a 3.3V power supply module, an instrument detection switch 5 and a temperature unit switching button 6.
A typical use process of the invention is as follows:
the safety risk of coal mine production can be effectively managed and controlled by reasonably grasping the depth and the temperature of the coal pile. Specific operation modes and operation principles will now be described by taking the detection of the depth and temperature of the coal pile as an example.
When the handheld rubber handle 1 inserts the detector into the coal pile to be detected, the magnetic sleeve (pontoon) continuously moves towards the direction of the threaded movable joint along with the continuous entering of the tail detection probe rod into the coal bed, and after the insertion action is stopped and maintained, the magnetic reed switch at the corresponding position is influenced by the magnetic force of the magnetic sleeve (pontoon) to be closed. The welding position of the magnetic reed switch on the circuit board is directly related to the insertion depth of the probe rod, and the structure has higher precision requirement.
As shown in fig. 3, after the reed switch at the corresponding position is closed, part of the series resistors form a passage through the closed reed switch, the depth resistance value at the position is obtained by utilizing the resistance voltage division principle of the constant voltage source in the series circuit of fig. 3, the depth resistance value is converted into a voltage signal through the resistance value and led out to the ends of the resistance value-depth conversion circuits RA-RB shown in fig. 5 through the connection terminals RA-RB, the voltage signal is converted into a voltage signal through the resistance voltage conversion circuit, and the STM32 singlechip acquires the voltage signal, converts the voltage signal into depth information and drives the OLED display module 3 to display depth and temperature, so that the whole process can be completed within 1 second.
While measuring the depth of the coal pile, the temperature sensor welded at the tail of the stainless steel probe rod is influenced by the surrounding temperature environment of the coal seam and shows the change of the self resistance value, and the change characteristic curve is shown in the following figure 4. The temperature sensor is connected in series in a resistance-temperature conversion circuit, the resistance value of the resistor is converted into a voltage signal by utilizing the resistance voltage division principle of a constant voltage source in the series circuit, and the STM32 singlechip acquires the voltage signal through a lead and converts the voltage signal into temperature information. And finally, the STM32 singlechip drives the OLED display screen to display the temperature value of the current coal pile depth.
The above introduces the basic principle, main features and beneficial effects of the novel and practical technology. It will be understood by those skilled in the art that many variations and modifications of the disclosed methods and techniques may be made, or equivalents may be modified, without departing from the scope of the invention. Therefore, any simple modification, equivalent substitution, equivalent variation and modification of the above embodiments according to the technical substance of the present invention, which do not depart from the technical solution of the present invention, still fall within the scope of the technical solution of the present invention.
Claims (4)
1. A handheld digital display detector for simultaneously detecting the temperature and the depth of a liquid or a material pile is characterized in that: the measuring device comprises a hollow stainless steel probe rod (8), wherein the upper end of the stainless steel probe rod is connected with a nickel plating dial plate (2), an STM32 singlechip and a connected OLED display module (3) are arranged in the nickel plating dial plate, and the STM32 singlechip converts measuring signals and drives the OLED display module to display depth and temperature information;
a circuit board assembly (4) is arranged in the stainless steel probe rod (8), a magnetic reed switch array circuit, a resistance value and depth conversion circuit and a resistance voltage conversion circuit which are sequentially connected are arranged in the circuit board assembly, the resistance voltage conversion circuit is connected to an STM32 singlechip in the nickel plating dial plate (2) through a cable assembly, and a temperature sensor (10) is arranged at the bottom of the stainless steel probe rod and is electrically connected with the resistance voltage conversion circuit through a cable;
the stainless steel probe rod is sleeved with a freely sliding magnetic sleeve (9), and the magnetic sleeve (9) slides to a position near one magnetic reed switch in the magnetic reed switch array circuit and forms a connection fit with the magnetic reed switch to indicate the depth of the stainless steel probe rod.
2. The hand-held digital display detector for simultaneously detecting the temperature and the depth of a liquid or a material pile according to claim 1, wherein: the upper end of the stainless steel probe rod (8) is in threaded connection with a threaded joint (7) arranged at the lower end of the nickel plating dial plate (2).
3. The hand-held digital display detector for simultaneously detecting the temperature and the depth of a liquid or a material pile according to claim 1, wherein: the magnetic reed switch array circuit comprises a group of resistors R which are connected in series and arranged at intervals, two ends of each resistor are respectively connected with one end of a magnetic reed switch G, the input end of the first resistor is used as one end of the magnetic reed switch array circuit, and the other ends of all the magnetic reed switches are connected in parallel and then used as the other end of the magnetic reed switch array circuit.
4. The hand-held digital display detector for simultaneously detecting the temperature and the depth of a liquid or a material pile according to claim 1, wherein: an end plate (10 a) is arranged at the bottom of the stainless steel probe rod to seal the temperature sensor (10) in the stainless steel probe rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311106819.1A CN117824864A (en) | 2023-08-30 | 2023-08-30 | Handheld digital display detector for simultaneously detecting temperature and depth of liquid or material pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311106819.1A CN117824864A (en) | 2023-08-30 | 2023-08-30 | Handheld digital display detector for simultaneously detecting temperature and depth of liquid or material pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117824864A true CN117824864A (en) | 2024-04-05 |
Family
ID=90503516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311106819.1A Pending CN117824864A (en) | 2023-08-30 | 2023-08-30 | Handheld digital display detector for simultaneously detecting temperature and depth of liquid or material pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117824864A (en) |
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2023
- 2023-08-30 CN CN202311106819.1A patent/CN117824864A/en active Pending
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