CN111751027A - Integrally packaged chain type temperature sensor and processing technology thereof - Google Patents
Integrally packaged chain type temperature sensor and processing technology thereof Download PDFInfo
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- CN111751027A CN111751027A CN202010756914.6A CN202010756914A CN111751027A CN 111751027 A CN111751027 A CN 111751027A CN 202010756914 A CN202010756914 A CN 202010756914A CN 111751027 A CN111751027 A CN 111751027A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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Abstract
The invention relates to the technical field of marine measuring instruments, and discloses an integrally packaged chain type temperature sensor, which comprises a tension cable and is characterized in that: the pull cable is provided with a plurality of temperature sensors, each temperature sensor comprises a circuit board and a temperature sensitive element, a lead of the circuit board is connected with a wire core of the pull cable, the circuit board is arranged inside the pull cable and is parallel to the wire core, and the temperature sensitive elements extend out of the circuit board. The invention also discloses an integrally packaged chain type temperature sensor and a processing technology thereof. The temperature sensitive element, the signal processing circuit, the communication unit and the tension cable are vulcanized together, so that the complexity of the system can be greatly reduced, the cost of the whole system is reduced, and the temperature sensitive element, the signal processing circuit, the communication unit and the tension cable have the characteristics of high reliability, high transmission rate and low power consumption.
Description
Technical Field
The invention relates to the technical field of marine measuring instruments, in particular to an integrally packaged chain type temperature sensor and a processing technology thereof.
Background
The temperature data is the basic parameter of physical ocean observation and the basic element of ocean dynamics, is the indispensable factor for calculating other physical parameters such as salinity, density and sound velocity, so the temperature data is widely applied to various detecting instruments, moving platforms, operating equipment, sailing ships, water body culture and even military weaponry.
For surface seawater, the temperature of the surface seawater is not uniform due to solar radiation, sea wind, water-gas exchange and wave power, but the environment becomes very silent and the movement of the seawater is very slow by less than ten meters, so that the temperature field inside the ocean is very uniform, and even the depth drop of several hundred meters to one thousand meters does not cause the temperature to change by 0.1 ℃. However, if such a region has severe temperature changes, for example, in the range of several tens of meters, the temperature changes exceed 0.1 degree centigrade, which may mean macroscopic physical marine phenomena, such as temperature jump layer, deep sea internal wave, ocean current on the sea bottom, black tide, etc., which may provide a very valuable data support for marine observation.
Therefore, the measurement accuracy of the temperature sensor for providing meaningful data support for marine science is generally required to be within +/-0.01 ℃ in conventional physical marine observation, and the measurement accuracy can reach +/-0.003 ℃ in the internationally better equipment.
One common application requirement is to measure the temperature distribution from the surface of a body of water to a certain depth. And carrying out large-scale and long-time continuous observation. For example, in the aspect of automatic aquaculture, if the temperature change condition of the water body is monitored and known in time, the aquaculture strategy can be adjusted in time, the influence of hydrological changes such as cold water mass and black tide on fishes, shrimps, shellfish and the like is prevented, and the economic loss is avoided. The application condition generally adopts a temperature chain form, namely a plurality of temperature sensors are fixed on the cable in a certain form, the sensors are spaced at certain distances according to the observation requirement, and finally the sensors form a chain-shaped distribution form on the cable.
Wherein the mounting means of each sensor on the hawser is according to the application demand of difference, divide into three kinds of forms again:
1. method for directly binding self-contained temperature sensor
The self-contained temperature sensor is an independent body which works autonomously, and a circuit system, a battery and a memory are arranged in the self-contained temperature sensor. The temperature of the environment can be measured at regular intervals (for example, 5 minutes, 1 hour, etc.) according to a preset program, and the measurement result can be stored in an internal memory. After a period of time (e.g., 3 months or 1 year), the entire sensor chain is salvaged. And then exporting the data in each sensor for later analysis.
The using mode has the characteristic of low requirement on the cable, and the cable only plays a role in bearing and fixing each sensor. Each sensor does not need an external communication structure, and only sealing is needed. The sensors are in an autonomous working mode, data can be stored in the sensors in advance, and all data can be obtained when the whole observation process is finished finally. Therefore, the data of the sensor has poor real-time performance and can only be obtained in a later period. This is also a key factor limiting its application.
2. Mode of adopting customized cable, watertight connector and direct-reading temperature sensor
In order to increase the real-time performance of measurement, people can obtain the data measured by the sensor at the first time. The sensor is required to be provided with an external communication interface. Therefore, the sensor becomes a direct-reading type, the common cable needs to be replaced by a communication cable, and the application environment is underwater, so that a connector with a watertight function is required to be used in the cable and the sensor.
The using mode has the characteristics that the data of the sensor can be transmitted in time, and the real-time performance of the sensor is improved. However, the entire cable system must be custom made, where the sensor needs to be connected, a cable branch with a watertight connector needs to be led out, which needs to be designed at the beginning of the cable manufacturing, and the cost of the entire system is high.
3. By means of inductive coupling transmission
The sensor couples data signals to the plastic-coated steel cable in an electromagnetic induction mode through an induction magnetic ring, and a modem with the same magnetic ring extracts signals in the plastic-coated steel cable above the water surface to form digital signals so as to complete the whole communication.
The use mode is characterized in that the position limitation of the sensor can be broken through by adopting a communication mode of induction transmission, and an induction magnetic ring of the sensor can move relative to the plastic-coated steel cable. The entire sensor is thus also freely movable on the plastic-coated steel cable. The data of the whole system is uploaded in real time. The defects are that the cost of the induction transmission system is high, not only all sensors need to have induction transmission capacity, but also a modem is needed above the water surface, and the complexity of the whole system is increased; secondly, the communication mode of induction transmission has very limited bandwidth, and compared with the traditional cable transmission, the data transmission speed is much slower; and thirdly, the sensor with the induction transmission function needs to be provided with a battery, only the direct electrical contact is avoided in the communication process, and meanwhile, the power consumption is very high in the induction transmission communication process, so that the quantity of the battery carried by the induction transmission type sensor is much more than that of the self-contained sensor.
As mentioned above, the various solutions, all having different disadvantages, can be basically summarized as:
1. data may not be uploaded in real time;
2. the cable needs to be customized and is expensive;
3. the sensor is provided with a watertight connector or an induction transmission unit, so the price is high;
4. the data transmission speed is low, and the power consumption is high.
Disclosure of Invention
Technical problem to be solved
The invention mainly solves the technical problems in the prior art, and provides the integrally packaged chain type temperature sensor and the processing technology thereof, which have the advantages of low manufacturing cost and high reliability.
(II) technical scheme
In order to achieve the purpose, the invention adopts the following technical scheme:
the integrally packaged chain type temperature sensor comprises a tension cable, wherein a plurality of temperature sensors are arranged on the tension cable, each temperature sensor comprises a circuit board and a temperature sensitive element, a lead of the circuit board is connected with a wire core of the tension cable, the circuit board is arranged inside the tension cable and is parallel to the wire core, and the temperature sensitive elements extend out of the circuit board.
Furthermore, a tensile rope is arranged inside the tensile cable.
Furthermore, a supporting strip is arranged below the circuit board, the length of the supporting strip is greater than that of the circuit board, and two ends of the supporting strip are connected with the tension cable sheath.
Furthermore, the wire cores of the tension cable are a positive power supply wire, a negative power supply wire and an A, B communication wire.
The invention also provides a processing technology of the integrally packaged chain type temperature sensor, which comprises the following steps:
1) determining the position of each temperature sensor on the tension cable;
2) cutting the rubber outer skin of the tension cable at the position corresponding to the temperature sensor, and respectively connecting the circuit board lead of the temperature sensor with the wire core of the tension cable;
3) placing a circuit board of a temperature sensor and the wire core in parallel inside the cable with the outer skin removed;
4) a supporting strip is arranged below a circuit board of the temperature sensor;
5) sequentially carrying out vulcanization packaging on positions corresponding to the temperature sensors;
6) and vulcanizing and packaging the tail end of the cable.
Further, in the step 1), the position of each temperature sensor node on the tension cable is determined according to the depth of the temperature to be observed.
Further, in the step 2), four metal wire cores are cut open, metal parts are exposed, four leads of the temperature sensor circuit board are respectively welded to the positive and negative power supplies and the exposed parts of the A, B communication wire cores, and the four leads are wrapped by insulating materials and are insulated from each other.
Further, the step 4) comprises the following steps: the length of the supporting strip is greater than that of the circuit board, and two ends of the supporting strip are connected with the tension cable sheath.
Further, the step 5) comprises the following steps:
5.1 placing the connected temperature sensor and the tension cable at the corresponding position in a mould, straightening the tension cable, ensuring that the exposed tension rope is in a tight and straight state, and adjusting the position of each part;
5.2 placing the vulcanized rubber in a vacuum tank, and vacuumizing to separate out gas dissolved in the vulcanized rubber;
5.3 taking the vulcanized rubber out of the vacuum tank, and slowly introducing the vulcanized rubber into the mold, so that the vulcanized rubber can well immerse key parts such as the circuit board, the temperature sensitive element, the exposed tension rope, the cable sheath section and the like, and bubbles are avoided, so that the vulcanized rubber and the cable sheath can be well contacted and infiltrated;
5.4, covering the upper cover of the mold, and waiting for the vulcanized rubber to solidify, so that the encapsulation of one temperature node is completed;
5.5 repeating the steps until all the temperature sensors are manufactured.
Advantageous effects
The invention provides an integrally packaged chain type temperature sensor and a processing technology thereof, and the integrally packaged chain type temperature sensor has the following beneficial effects:
1. each sensor node adopts an integral vulcanization mode, and a common sensor shell and a watertight connector are eliminated, so that the cost of the whole sensor is greatly reduced;
2. with the mode of the whole vulcanization of pulling force cable, measure such as tensile rope, support billet have been adopted to inside simultaneously, have increased entire system's tensile ability and resistant ability of buckling for whole temperature chain can bear water pressure, guarantees water tightness, and the end can bear certain counter weight. When storage is required, the whole system can be coiled up;
3. the direct current power supply directly supplies power, and the low power consumption characteristic of the sensor is favorably realized. Each sensor does not need a self-contained battery, so that the volume of each sensor is reduced;
4. by adopting an RS485 bus type communication mode, the communication distance of kilometers away can be realized, and meanwhile, a higher communication speed is kept;
5. the temperature sensitive element is close to the surface of the vulcanized body, so that the response speed of the temperature sensor can be improved to a certain extent, and the requirement of conventional fixed-point observation can be met.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the temperature sensor of the present invention;
FIG. 3 is a schematic left side view of the structure at the temperature sensor of the present invention;
FIG. 4 is a circuit topology of the present invention;
wherein 1 is a tension cable, 2 is a temperature sensor, 3 is the tail end of the tension cable, 4 is a heavy object, 5 is a water receiving device, 6 is a wire core, 7 is a tension rope, 8 is a temperature sensitive element, 9 is a cable sheath, 10 is a vulcanizing body, 11 is a circuit board, 12 is a lead wire, and 13 is a support strip.
The specific implementation mode is as follows:
the technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example 1
The utility model provides an integrated packaged chain temperature sensor, as shown in figure 1, includes tension cable 1, is equipped with a plurality of temperature sensor 2 on tension cable 1, and tension cable 1 upper end is connected with receiving arrangement 5 on water, and tension cable 1's end 3 is connected with heavy object 4.
As shown in fig. 2 to 3, the temperature sensor includes a circuit board 11 and a temperature sensing element 8, a lead 12 of the circuit board 11 is connected to the wire core 6 of the tension cable 1, the circuit board 11 is disposed inside the tension cable 1 and parallel to the wire core 6, and the temperature sensing element 8 extends out of the circuit board. The number of the leads is four, and the wire cores are also four, namely a positive power line, a negative power line and an A, B communication line. The lead wires are respectively connected with the four wire cores and are electrically connected and communicated with the receiving equipment 5 on the water. The circuit topology is shown in fig. 4.
The tension cable is also internally provided with a tension rope 7.
And a supporting strip 13 is further arranged below the circuit board 11, the length of the supporting strip 13 is slightly greater than that of the circuit board 11, and two ends of the supporting strip are connected with the cable sheath 9 of the tension cable. The temperature sensor and the tension cable are vulcanized and packaged, and the outer part is a vulcanized body 10.
The temperature sensitive element, the signal processing circuit, the communication unit and the tension cable are vulcanized together, so that the complexity of the system can be greatly reduced, the cost of the whole system is reduced, and the characteristics of high reliability, high transmission rate and low power consumption are achieved.
Each node of the temperature sensor is directly vulcanized on the tension cable, and each node is just a small bulge on the tension cable in appearance, and if the circuit design of the temperature sensor is smaller, the thickness degree of the original tension cable can be even kept after vulcanization. So that the individual temperature nodes form one whole with the cable. The cable is generally four-core, and the wire diameter can be determined according to the number of sensors and the overall power consumption of all the sensors. The cable must be a flexible tension cable, the whole cable is kept soft, and four metal wire cores inside the cable are provided with independent insulating sheaths and are insulated from each other. The cable is internally provided with a tensile rope, the material can be a plastic nylon material or a metal steel wire material, the strength of the tensile rope is designed according to the maximum tensile force borne by the whole sensor system in the use process, and in the use environment, the metal wire core and the outer skin of the cable do not bear the main tensile force.
In the aspect of electricity, a mode of direct current power supply + RS485 interface is adopted, wherein a power supply uses a positive wire and a negative wire, RS485 uses A, B wires, and the mode can form a communication mode in a bus mode. The electrical topological structure is very simple, the communication distance of the system is easily prolonged, the communication speed is improved, and the power consumption of the whole system is reduced.
Example 2
A processing technology of an integrally packaged chain type temperature sensor.
Firstly, according to the actual needs, the depth of the temperature to be observed is planned, and then the position of each temperature sensor node on the tension cable is determined.
For a specific temperature node, firstly splitting the rubber sheath of the tension cable, removing a small section of the rubber sheath, wherein the length of the removed sheath is slightly longer than that of the embedded circuit board, and keeping the metal wire core and the tensile rope in the sheath.
At a proper position, the four metal wire cores are cut open, the metal parts are exposed, the four leads of the temperature sensor circuit board are respectively welded to the exposed parts of the wire cores, and the four leads are wrapped by insulating materials and are insulated from each other.
The temperature sensor circuit board is laid flat at the position of the sheathed cable.
The temperature sensor is provided with a temperature sensitive element, the electrical characteristics of the temperature sensitive element change along with the change of the temperature, and the circuit system calculates the current temperature through the measurement of the element. In order to make the response speed of the temperature sensor faster, the temperature sensitive element should be as far out of the circuit board as possible, but it is still ensured that the temperature sensitive element can be covered by the vulcanized material.
In order to increase the firmness degree of the whole packaging node, a supporting steel bar is placed below the circuit board, the length of the steel bar is slightly longer than that of the circuit board, and the steel bar is overlapped with the cable sheaths at the two ends to a certain extent. Therefore, the temperature sensor node part is not bent when the flexible tension cable is bent, and elements such as an internal circuit board and the like are protected from being damaged.
And designing a standard encapsulation mold, placing the connected parts into the mold, straightening the tension cable, ensuring that the exposed tension rope is in a straightened state, and adjusting the positions of the parts.
And (3) placing the vulcanized rubber in a vacuum tank, and vacuumizing to separate out the gas dissolved in the vulcanized rubber.
The vulcanized rubber is taken out of the vacuum tank and slowly introduced into the mold, so that the vulcanized rubber can well immerse key parts such as a circuit board, a temperature sensitive element, a naked tensile rope, a cable sheath section and the like, bubbles are avoided, and the vulcanized rubber and the cable sheath can be well contacted and infiltrated.
And covering the upper cover of the mold, and waiting for the vulcanized rubber to solidify, so that the packaging of one temperature node is completed.
And repeating the steps until all the temperature nodes are manufactured.
The bottommost portion of the whole cable, namely the tail end of the underwater portion, needs to be encapsulated by vulcanized rubber to form a blind end, so that seawater infiltration is avoided.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides an integrated packaged chain temperature sensor, includes the tension cable, its characterized in that: the pull cable is provided with a plurality of temperature sensors, each temperature sensor comprises a circuit board and a temperature sensitive element, a lead of the circuit board is connected with a wire core of the pull cable, the circuit board is arranged inside the pull cable and is parallel to the wire core, and the temperature sensitive elements extend out of the circuit board.
2. The integrally packaged chain type temperature sensor according to claim 1, wherein: and a tensile rope is arranged in the tensile cable.
3. The integrally packaged chain type temperature sensor according to claim 1, wherein: the circuit board below is provided with the support bar, support bar length is greater than the length of circuit board, and the support bar both ends meet with pulling force cable crust.
4. The integrally packaged chain type temperature sensor according to claim 1, wherein: the core of the tension cable is a positive power line, a negative power line and an A, B communication line.
5. The process for manufacturing an integrally packaged temperature sensor chain as claimed in any one of claims 1 to 4, wherein: the method comprises the following steps:
1) determining the position of each temperature sensor on the tension cable;
2) cutting the rubber outer skin of the tension cable at the position corresponding to the temperature sensor, and respectively connecting the circuit board lead of the temperature sensor with the wire core of the tension cable;
3) placing a circuit board of a temperature sensor and the wire core in parallel inside the cable with the outer skin removed;
4) a supporting strip is arranged below a circuit board of the temperature sensor;
5) sequentially carrying out vulcanization packaging on positions corresponding to the temperature sensors;
6) and vulcanizing and packaging the tail end of the cable.
6. The process for manufacturing integrally packaged chain type temperature sensor according to claim 5, wherein: and step 1) is to determine the positions of the temperature sensor nodes on the tension cable according to the depth of the temperature to be observed.
7. The process for manufacturing integrally packaged chain type temperature sensor according to claim 5, wherein: and 2) cutting open the four metal wire cores to expose the metal parts, respectively welding the four leads of the temperature sensor circuit board to the positive and negative power supplies and the exposed parts of the A, B communication wire cores, and wrapping and processing the four leads by using an insulating material to insulate the four leads from each other.
8. The process for manufacturing integrally packaged chain type temperature sensor according to claim 5, wherein: the step 4) comprises the following steps: the length of the supporting strip is greater than that of the circuit board, and two ends of the supporting strip are connected with the tension cable sheath.
9. The process for manufacturing integrally packaged chain type temperature sensor according to claim 5, wherein: the step 5) comprises the following steps:
5.1 placing the connected temperature sensor and the tension cable at the corresponding position in a mould, straightening the tension cable, ensuring that the exposed tension rope is in a tight and straight state, and adjusting the position of each part;
5.2 placing the vulcanized rubber in a vacuum tank, and vacuumizing to separate out gas dissolved in the vulcanized rubber;
5.3 taking the vulcanized rubber out of the vacuum tank, and slowly introducing the vulcanized rubber into the mold, so that the vulcanized rubber can well immerse key parts such as the circuit board, the temperature sensitive element, the exposed tension rope, the cable sheath section and the like, and bubbles are avoided, so that the vulcanized rubber and the cable sheath can be well contacted and infiltrated;
5.4, covering the upper cover of the mold, and waiting for the vulcanized rubber to solidify, so that the encapsulation of one temperature node is completed;
5.5 repeating the steps until all the temperature sensors are manufactured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010756914.6A CN111751027A (en) | 2020-07-31 | 2020-07-31 | Integrally packaged chain type temperature sensor and processing technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010756914.6A CN111751027A (en) | 2020-07-31 | 2020-07-31 | Integrally packaged chain type temperature sensor and processing technology thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697310A (en) * | 2020-12-28 | 2021-04-23 | 山东省科学院海洋仪器仪表研究所 | Marine strong-magnetic surface-mounted surface seawater temperature measuring device and method for sailing ship |
| CN113654687A (en) * | 2021-06-19 | 2021-11-16 | 广州欧纳电子科技有限公司 | Cable type temperature observation chain |
| CN114705322A (en) * | 2022-06-07 | 2022-07-05 | 海南浙江大学研究院 | Temperature chain and method of use thereof |
-
2020
- 2020-07-31 CN CN202010756914.6A patent/CN111751027A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697310A (en) * | 2020-12-28 | 2021-04-23 | 山东省科学院海洋仪器仪表研究所 | Marine strong-magnetic surface-mounted surface seawater temperature measuring device and method for sailing ship |
| CN112697310B (en) * | 2020-12-28 | 2024-01-26 | 山东省科学院海洋仪器仪表研究所 | Device and method for measuring temperature of sea water on surface of strong magnetic surface-mounted surface for sailing ship |
| CN113654687A (en) * | 2021-06-19 | 2021-11-16 | 广州欧纳电子科技有限公司 | Cable type temperature observation chain |
| CN114705322A (en) * | 2022-06-07 | 2022-07-05 | 海南浙江大学研究院 | Temperature chain and method of use thereof |
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