阅读说明：本技术 一种含水检测仪 (Moisture detector ) 是由 国小雨 张建国 程波 宋志刚 常峰 周宏斌 牛庚森 程希媛 张明程 程希尧 李建 于 2021-09-01 设计创作，主要内容包括：本发明公开了一种含水检测仪,包括检测仪外管,检测仪外管内设置有检测仪内管,检测仪内管内设置有根据原油和水的介电常数不同使两端产生不同电容量的电极极组,检测仪内管内还设置有用于检测原油温度的热敏电阻以及检测原油反射率的光电传感器,检测仪外管上设置有用于将电极极组传送的电容量数值、热敏电阻检测到的原油温度以及原油反射率进行数据分析的电子数据处理器。该含水检测仪,通过电极极组对检测仪内管内原油中的含水率进行实时检测,并将数据传送至电子数据处理器内,通过热敏电阻对检测仪内管内原油的温度进行实时检测,由电子数据处理器分析后通过辅热层对原油中水的温度进行补偿,以防止温度差导致原油中水的介电常数发生变化。(The invention discloses a water-containing detector, which comprises an outer detector tube, wherein an inner detector tube is arranged in the outer detector tube, an electrode pole group which can generate different capacitance at two ends according to the difference of dielectric constants of crude oil and water is arranged in the inner detector tube, a thermistor for detecting the temperature of the crude oil and a photoelectric sensor for detecting the reflectivity of the crude oil are also arranged in the inner detector tube, and an electronic data processor for carrying out data analysis on the capacitance value transmitted by the electrode pole group, the crude oil temperature detected by the thermistor and the reflectivity of the crude oil is arranged on the outer detector tube. According to the water content detector, the water content in crude oil in the inner pipe of the detector is detected in real time through the electrode group, data are transmitted into the electronic data processor, the temperature of the crude oil in the inner pipe of the detector is detected in real time through the thermistor, and the temperature of water in the crude oil is compensated through the auxiliary heating layer after the analysis of the electronic data processor, so that the dielectric constant of the water in the crude oil is prevented from being changed due to temperature difference.)

1. A moisture detector, characterized in that: including detector outer tube (1), be provided with detector inner tube (2) in detector outer tube (1), be provided with electrode utmost point group (3) that make both ends produce different electric capacities according to the dielectric constant difference of crude oil and water in detector inner tube (2), still be provided with thermistor (4) that are used for detecting the crude oil temperature in detector inner tube (2), still be provided with the photoelectric sensor who is used for detecting crude oil light reflectivity in detector inner tube (2), be provided with on detector outer tube (1) and be used for with the electric capacity numerical value of electrode utmost point group (3) conveying crude oil temperature that thermistor (4) detected and photoelectric sensor's reflectivity numerical value carry out data analysis's electronic data processor (5).

2. The moisture content detector of claim 1, wherein: the electrode pole group (3) is arranged in the middle of the inner wall of the inner pipe (2) of the detector in a circumferential array mode, the electrode pole group (3) is assembled and used for generating different electric capacities at two ends of the electrode pole group (3) according to the water content of crude oil according to the difference of dielectric constants of the crude oil and water in the crude oil in the inner pipe (2) of the detector, and data are transmitted into the electronic data processor (5).

3. The moisture content detector of claim 1, wherein: thermistor (4) are the circumference array set up in on the inner wall of the adjacent input end one side of detector inner tube (2), thermistor (4) are assembled and are used for real-time supervision the temperature of crude oil in detector inner tube (2) and convey in electronic data processor (5), photoelectric sensor sets up in detector inner tube (2) of thermistor (4) top to be used for reflectivity numerical value conveying in real-time detection detector inner tube (2) in electronic data processor (5).

4. The moisture content detector of claim 1, wherein: the electronic data processor (5) is arranged on the outer wall of the outer tube (1) of the detector, the electronic data processor (5) is assembled and used for carrying out data analysis on the capacitance value transmitted by the electrode group (3) and the crude oil temperature detected by the thermistor (4), comparing the capacitance value with the preset water content, compensating the temperature of water in the crude oil, and uploading the calculated water content and temperature data of the crude oil through a ZigBee network.

5. The moisture content detector of claim 1, wherein: the detector is characterized in that the outer wall of the outer detector tube (1) is further provided with a pumping unit state detector (6) which is symmetrically distributed with the electronic data processor (5), and the pumping unit state detector (6) is assembled to be used for comparing the water content according to different working running states of the pumping unit so as to obtain accurate water content.

6. The moisture content detector of claim 1, wherein: an auxiliary thermal layer (7) is arranged between the inner wall of the outer pipe (1) of the detector and the outer wall of the inner pipe (2) of the detector, and the auxiliary thermal layer (7) is assembled to compensate the temperature of the water in the crude oil, so that the dielectric constant of the water in the crude oil cannot change along with the change of the temperature.

7. The moisture content detector of claim 1, wherein: the detector outer tube (1) with the input of detector inner tube (2) is provided with crude oil input (8), the pipeline radius of detector outer tube (1) is greater than the radius of crude oil input (8) internal pipeline, detector inner tube (2) with the radius of crude oil input (8) internal pipeline is unanimous and keeps being linked together, detector outer tube (1) detector inner tube (2) with crude oil input (8) internal pipeline keeps the axle center to be located same axis.

8. The moisture content detector of claim 1, wherein: the detector outer tube (1) with the output of detector inner tube (2) is provided with crude oil output end (9), the pipeline radius of detector outer tube (1) is greater than the radius of crude oil output end (9) inner tube, detector inner tube (2) with the radius of crude oil output end (9) inner tube is unanimous and keeps being linked together, detector outer tube (1) detector inner tube (2) with crude oil output end (9) inner tube keeps the axle center to be located same axis.

Technical Field

The invention relates to the technical field of oilfield exploitation, in particular to a water content detector.

Background

In the process of oil exploitation, the crude oil solution pumped by the pumping unit is generally formed by mixing crude oil, water, natural gas and the like, and after the natural gas in the crude oil solution is separated, the water content of the crude oil is detected, so that workers can know water outlet data of an oil well, and digital oil field construction such as crude oil yield, oil outlet horizon, development life prediction of the oil well, yield quality control of the oil well, oil well state detection, water injection operation and the like is carried out according to the data.

However, most of the existing crude oil water content measuring modes are manual sampling and measuring methods, the results of the manual sampling and measuring are influenced by more factors, a large amount of time and manpower can be consumed, errors of the detection results are easily caused, and the real-time detection requirements of the existing automatic production cannot be met.

Disclosure of Invention

The invention aims to provide a water content detector which can detect the water content of crude oil in real time and transmit detection data to a background in the oil exploitation process so as to meet the real-time detection requirement of automatic production.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a moisture detector, includes the detector outer tube, be provided with the detector inner tube in the detector outer tube, be provided with the electrode utmost point group that makes different electric capacities in both ends according to the dielectric constant difference of crude oil and water in the detector inner tube, still be provided with the thermistor that is used for detecting crude oil temperature in the detector inner tube, be provided with on the detector outer tube and be used for with the electric capacity numerical value of electrode utmost point group conveying and the crude oil temperature that thermistor detected carries out data analysis's electronic data processor.

Preferably, the electrode pole sets are arranged in the middle of the inner wall of the inner pipe of the detector in a circumferential array, and are assembled to generate different capacitances at two ends of the electrode pole sets according to the water content of crude oil and the dielectric constant of the crude oil in the inner pipe of the detector, and transmit data to the electronic data processor.

Preferably, the thermistors are arranged on the inner wall of one side of the adjacent input end of the inner pipe of the detector in a circumferential array, and the thermistors are assembled for monitoring the temperature of crude oil in the inner pipe of the detector in real time and transmitting the temperature to the electronic data processor.

Preferably, the electronic data processor is arranged on the outer wall of the outer tube of the detector, and is configured to analyze the capacitance value transmitted by the electrode group and the crude oil temperature detected by the thermistor, compare the capacitance value with a preset water content, compensate the temperature of water in the crude oil, and upload the calculated water content and temperature data of the crude oil through a ZigBee network.

Preferably, still be provided with on the outer wall of detector outer tube with electronic data processor symmetric distribution's beam-pumping unit state detector, beam-pumping unit state detector is assembled and is used for comparing the moisture content according to the different work running state of beam-pumping unit to this reachs accurate moisture content.

Preferably, an auxiliary thermal layer is arranged between the inner wall of the outer pipe of the detector and the outer wall of the inner pipe of the detector, and the auxiliary thermal layer is assembled to compensate the temperature of the water in the crude oil, so that the dielectric constant of the water in the crude oil cannot change along with the change of the temperature.

Preferably, the input ends of the outer pipe and the inner pipe of the detector are provided with crude oil input ends, the radius of the pipe of the outer pipe of the detector is larger than that of the pipe of the inner pipe of the crude oil input end, the radii of the inner pipe of the detector and the pipe of the inner pipe of the crude oil input end are consistent and communicated, and the axes of the outer pipe of the detector, the inner pipe of the detector and the pipe of the inner pipe of the crude oil input end are kept on the same axis.

Preferably, the output ends of the outer pipe and the inner pipe of the detector are provided with crude oil output ends, the radius of the pipe of the outer pipe of the detector is larger than that of the pipe inside the crude oil output end, the radii of the inner pipe of the detector and the pipe inside the crude oil output end are consistent and are communicated, and the axes of the outer pipe of the detector, the inner pipe of the detector and the pipe inside the crude oil output end are located on the same axis.

In the technical scheme, the invention has the beneficial effects that:

1. the water content detector can detect the water content in the crude oil in the inner pipe of the detector in real time through the electrode group in the process of oil exploitation, and transmits data to the electronic data processor.

2. The water content detector can detect the temperature of crude oil in a pipe in the detector in real time through the thermistor in the detection process, transmit data to the electronic data processor, and compensate the temperature of water in the crude oil through the auxiliary heat layer after the analysis of the electronic data processor, so that the dielectric constant of the water in the crude oil is prevented from changing due to temperature difference.

3. This moisture detector can compare the moisture content according to the work running state that the beam-pumping unit is different through beam-pumping unit state detector to this reachs accurate moisture content.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a front cross-sectional structural view of the present invention;

FIG. 3 is a schematic diagram of a power supply circuit diagram of the signal acquisition circuit according to the present invention;

FIG. 4 is a schematic diagram of a circuit diagram of the signal acquisition circuit MCU of the present invention;

FIG. 5 is a schematic diagram of a data transmission circuit diagram of the signal acquisition circuit according to the present invention;

FIG. 6 is a schematic diagram of a signal acquisition circuit diagram of the signal acquisition circuit of the present invention;

FIG. 7 is a schematic diagram of a solar charging circuit of the data processing circuit of the present invention;

FIG. 8 is a schematic diagram of a solar power supply circuit of the data processing circuit of the present invention;

FIG. 9 is a schematic diagram of a circuit diagram of a data processing circuit MCU according to the present invention;

FIG. 10 is a schematic diagram of a data receiving circuit diagram of the data processing circuit at the acquisition end of the present invention;

FIG. 11 is a schematic diagram of a temperature acquisition circuit diagram of the data processing circuit of the present invention;

FIG. 12 is a schematic diagram of a ZigBee data uploading circuit diagram of the data processing circuit of the invention;

fig. 13 is a schematic circuit diagram structure diagram of the pumping unit state detector of the present invention.

FIG. 14 is a block diagram of an embodiment of a moisture detector of the present invention.

In the figure: 1. an outer tube of the detector; 2. an inner tube of the detector; 3. an electrode group; 4. a thermistor; 5. an electronic data processor; 6. a pumping unit state detector; 7. auxiliary heat layer; 8. a crude oil input; 9. and a crude oil output end.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 5, the present invention provides a technical solution: a water content detector comprises an outer detector tube 1, an inner detector tube 2 is arranged in the outer detector tube 1, an electrode pole group 3 which can generate different capacitance at two ends according to the difference of dielectric constants of crude oil and water is arranged in the inner detector tube 2, a thermistor 4 for detecting the temperature of the crude oil is also arranged in the inner detector tube 2, an electronic data processor 5 for carrying out data analysis on the capacitance value transmitted by the electrode pole group 3 and the crude oil temperature detected by the thermistor 4 is arranged on the outer detector tube 1, the structural design is convenient for carrying out real-time detection on the water content in the crude oil in the inner detector tube 2 through the electrode pole group 3 and transmitting data to the electronic data processor 5, meanwhile, the temperature of the crude oil in the inner detector tube 2 can be detected in real time through the thermistor 4 in the detection process and the data can be transmitted to the electronic data processor 5, the temperature of water in the crude oil is compensated through the auxiliary thermal layer 7 after being analyzed by the electronic data processor 5 so as to prevent the dielectric constant of the water in the crude oil from changing due to temperature difference, and the water content is compared through the pumping unit state detector 6 according to different working running states of the pumping unit, so that the accurate water content is obtained.

After the stock solution enters the water content detector, the electronic data processor 5 carries out operation analysis on the capacitance value transmitted by the electrode group and the detection value of the thermistor 4 due to the change of the medium and the temperature, and the electronic data processor 5 can calculate the water content according to a preset program due to the large difference of the dielectric constants of water and oil in the stock solution. However, the stock solution may contain natural gas, which has a dielectric constant close to that of the crude oil, so that the electronic data processor 5 cannot distinguish the natural gas from the crude oil. The photoelectric sensor can compare crude oil or natural gas by utilizing the difference of light reflection amount of the crude oil and the natural gas, and is arranged on the wall of the inner pipe 2 of the detector and above the thermistor 4.

As shown in fig. 1 and fig. 2, firstly, a crude oil input end 8 is installed at an oil transportation end of a gas-liquid separator, then a crude oil output end 9 is installed at an input end of a crude oil transportation pipeline, after natural gas in crude oil is separated by the gas-liquid separator, crude oil can move from the crude oil input end 8 to the crude oil output end 9, after the crude oil enters the inner pipe 2 of the detector from the crude oil input end 8, a thermistor 4 on the inner wall of the inner pipe 2 of the detector firstly detects the temperature of the crude oil in the inner pipe 2 of the detector in real time, and transmits data to an electronic data processor 5, after the crude oil is analyzed by the electronic data processor 5, the temperature of water in the crude oil is compensated through an auxiliary heating layer 7 between the inner pipe 2 of the detector and the outer pipe 1 of the detector, so as to prevent the dielectric constant of the water in the crude oil from changing due to temperature difference, and simultaneously, according to the principle of a capacitor, that different dielectric constants of different media between a positive electrode plate and a negative electrode plate are different from each other, the capacitance at the two ends of the polar plate is different, when crude oil flows through the electrode group 3, the water content is different due to the different dielectric constants of the crude oil and the water, different capacitance is generated at the two ends of the electrode group 3, the data is transmitted into the electronic data processor 5, the electronic data processor 5 analyzes the capacitance value transmitted by the electrode group 3 and the crude oil temperature detected by the thermistor 4, the data is compared with the preset water content, the temperature of the water in the crude liquid is compensated through the auxiliary heat layer 7, and then the calculated water content and the calculated temperature of the crude liquid are uploaded through the ZigBee network.

Because the oil pumping unit is in two states of an upper stroke and a lower stroke when working, and the water content of crude oil in the two states of the upper stroke and the lower stroke is different according to the working principle of the oil pumping unit and the data analysis detected by the equipment, the purpose of installing the oil pumping unit state detector 6 is to compare the water content of the crude oil according to different working running states of the oil pumping unit so as to obtain accurate water content, and the oil pumping unit state detector 6 can transmit a signal sent by a photoelectric switching circuit to an electronic data processor 5 through a transmitting circuit when a polish rod of the oil pumping unit runs to an upper dead point (an upper stroke dead point) or a lower dead point (a lower stroke dead point), and analyze the water content of the state by the electronic data processor 5.

As shown in fig. 14, as a preferred embodiment, the electrode assembly 3, the thermistor 4, the photoelectric sensor and the pumping unit status detector 6 in the present invention are used as the input end of the front signal, and together with the electronic data processor 5, the on-line fast calibration port, the digital display and the remote transmission circuit, form the electronic management control system of the moisture detector. Wherein the content of the first and second substances,

the electrode group 3, the thermistor 4 and the photoelectric sensor can be integrally assembled into a composite sensor module, so that an electronic management control system performs A/D conversion on signals of the composite sensor module and a pumping unit state detector 6, various data are subjected to operation analysis by an electronic data processor 5 and the water content is transmitted to a digital display, and meanwhile, the data are uploaded in real time through a ZigBee network.

The invention also has a solar power supply system which is composed of a solar panel, a charging and power supply circuit and a small storage battery. It is used for supplying power to the electronic management control system.

As a preferred embodiment, the process of the electronic data processor 5 for performing the operational analysis on various data includes a process of comparing the data of the composite sensor with the moisture data preset in the system, and the electronic data processor 5 runs software and introduces a large amount of various data of the medium in the stock solution of the oil block into the software, so that the intelligent analysis can be performed on the change of moisture and temperature and the separation of oil and gas. Because the dielectric constant of the water in the stock solution is changed along with the change of the temperature, the dielectric constant is nonlinear, and the change of the water content is different, the software can carry out intelligent sectional compensation according to different water contents and different temperatures. The software supports the quick on-line marking and the arbitrary switching of various display interfaces.

The electronic data processor 5 is responsible for carrying out operation analysis on various data transmitted by the composite sensor, and the water content can be obtained by comparing the electronic data processor 5 with the preset water content data in the software due to the large difference of the dielectric constants of water and oil in the stock solution. However, since the stock solution contains natural gas, which has a similar dielectric constant to that of the crude oil, the electronic data processor 5 cannot distinguish this from the data transmitted by the electrode assembly 3. The data supplemented by the temperature sensor and the photoelectric sensor are added, so that the electronic data processor 5 can conveniently perform comparison analysis. And then the actual water content of the stock solution entering the composite sensor is obtained by combining the support of multiple data in the software. In addition, the dielectric constant of water changes with the change of temperature, and the temperature needs to be compensated. And finally, the micro-electronic data processor transmits the obtained real-time moisture content to the digital display, and simultaneously uploads the data through a ZigBee network. The on-line quick calibration port is set for ensuring that the detection accuracy of the moisture detector needs to be calibrated regularly, and the on-line quick calibration port has the advantages that the port which is connected and installed outside the moisture detector control box by a mobile phone can be adjusted on line without influencing the normal detection of equipment.

Supplementary explanation:

1. electronic data processor (5)

The electronic data processor (5) is divided into two parts: signal acquisition circuit, data processing circuit (including ZigBee data uploading circuit and solar charging circuit)

The signal acquisition circuit converts the acquired sensor signals (capacitance) into digital signals, and then sends the data to the data processing circuit through the serial port. The two are isolated by an optical coupling element, and the acquisition circuit is ensured not to be interfered by the outside to the maximum extent. The data processing circuit converts the received sensor data into water content, collects the temperature of the mixed liquid through the temperature collecting circuit, and corrects the temperature of the water content value. And then, uploading the data to the RTU through the ZigBee network.

The signal acquisition circuit:

power supply circuit primitive device description

J1: jumper switch

BT 1: battery with a battery cell

C21: ceramic capacitor 0.1uF

C22: ceramic capacitor 1uF

C23: ceramic capacitor 1uF

C20: tantalum capacitor 220uF

R21: resistance 1K

R22: resistance of 100 ohms

Q21: n-channel mosfet, AO3400

U21: low voltage sense chip, XC6109C27

U22: low dropout buck regulator chip, XC6209B332

The working principle is as follows:

BT1 is a battery, the voltage can be between 3.3 and 4.2, and the standard is 3.6V.

The C21, R21 and Q21 form a low-voltage drop anti-reverse connection circuit to prevent the reverse connection of the battery from burning the circuit.

U21 is a low voltage detection chip, when the battery voltage is lower than 2.7V, its 3 pin outputs low level, U22 stops working, the system no longer consumes power. When the battery is a rechargeable lithium battery, the chip plays a role in preventing the battery from being over-discharged and protecting the battery. R22 is a current limiting resistor, and when the output voltage of U21 changes suddenly, the current of the U22 pin 3 is not too large.

U22 is a voltage regulation chip that provides voltage down to 3.3V for use by the rear system when the battery voltage is above 3.3V. C22 and C23.

C20 is a 220uF tantalum capacitor, which ensures the stability of the system voltage.

MCU circuit primitive device description

U61: single chip microcomputer STM32L010C6T6

C61, C62, C63, C64: ceramic capacitor 0.1uF

P61: debugging interface

X81: crystal oscillator 8M

C65, C66: ceramic capacitor 20pF

R61: resistor 10K

The working principle is as follows:

the singlechip selects for use low-power consumption, the high performance-price ratio chip STM32L010C6T6 of STM company production, and this chip generally uses in low-power consumption scenes such as wearing equipment in a large number, and the new ability is stable, and the running power consumption is ultralow, is fit for being used for battery powered's scene.

C61-C64 are decoupling capacitors, and the voltage of the chip is guaranteed to be stable.

The X81, the C65 and the C66 form a crystal oscillator resistor, the X81 selects 8MHz frequency, the internal working frequency of the chip is adjustable, and the maximum frequency is 32 MHz.

A Boot0 pin of the chip is grounded through a 10K resistor, so that the chip is ensured to operate in an operation mode after being electrified.

The PB10 pin can be configured as a serial port transmitting pin, and transmits data of collected sensor signals to a data processing part (see second data processing circuit) through an optical coupler (see 3 for data transmission).

PB 12-PB 15 are configured as common GPIO, and are communicated with PCAP01 (see 4. signal acquisition) through software simulation SPI communication, and then sensor data are acquired.

Data transmission circuit diagram operating principle:

the single chip microcomputer sends data to an input end (pin 3) of the optocoupler element U71(TLP2361) through a TX _ CAP pin, a pin 5 of the U71 synchronously reacts to the level of the pin 3, and the pin is connected with a serial port receiving pin of the data processing circuit through a wiring terminal, so that the data processing circuit receives the data sent by the acquisition circuit. The optical coupling is used for isolating the communication lines of the two parts of circuits, so that the interference of the data processing circuit to the data acquisition circuit is greatly reduced.

The working principle of the signal acquisition circuit diagram is as follows:

u81(PCAP01AD) is a core device for signal acquisition, and can convert a capacitance signal into a digital signal, wherein P81 is a sensor terminal. The host computer (MCU) can communicate with the SPI interface to obtain sensor data.

Data processing circuit

The working principle of the solar charging circuit is as follows:

the data processing circuit is high in power consumption, a solar energy and battery combined power supply mode is adopted, a 3.7V 4500mAh rechargeable lithium battery is adopted as a battery, a 3W5V monocrystalline silicon solar panel is adopted as a solar panel, the power consumption of the system is 5mA, and the data processing circuit can be guaranteed to continuously operate for more than 1 month under the condition of no sun. P101 is a solar panel wiring port. After the voltage and the current are stabilized and stabilized by C101, C102 and L101, the voltage and the current are input into U101, and U101 is a lithium battery charging chip, so that the battery can be prevented from being damaged due to overcharge. The VCH1 and GCH1 pins are respectively connected with the positive electrode and the negative electrode of the rechargeable battery (see power supply 2).

Power supply: VCH1 and GCH1 are the positive and negative terminals of the output terminal of the rechargeable circuit (see solar charging circuit), and BT101 is a rechargeable lithium battery. SW1 is a push button switch. C104, R102 and Q101 form a battery anti-reverse connection circuit. The U102 protects the battery from damage caused by over discharge, and when the voltage of the battery is lower than 2.7V, the power supply of the system is automatically cut off. U103 is a low dropout linear regulator chip, and stabilizes the system voltage at 3.3V.

MCU details in the latter packet part

The data receiving working principle of the acquisition end is as follows: data from the signal acquisition circuit is received.

The working principle of the temperature acquisition circuit diagram is as follows:

the temperature acquisition circuit adopts a constant-voltage constant-current source and a PT1000 platinum thermal resistor to acquire temperature data. Q21 is P channel mosfet, and MCU controls the power supply of this part of circuit through the level of control pin PT _ EN, when needing to gather data, just supplies power for current circuit, realizes the low-power consumption purpose. U21 is a voltage regulation chip XC6206P152, which keeps the voltage between pin 2 and pin 1 at 1.5V, and which, together with R21 and R22, constitutes a constant current source. The PT1000 PT thermistor was connected to the P21 terminal using a 2-wire system. Since the current flowing through the resistor of the PT1000 is constant, when the resistance of the PT1000 varies with the temperature, the voltage of the PT _ ADCIN pin also varies and is in a direct proportional relationship. The MCU acquires the voltage value of the PT _ ADCIN pin through the ADC pin and then reversely deduces the temperature. Where R21 is a 100 ohm adjustable resistor for calibration.

The ZigBee data uploading circuit diagram work principle is as follows:

the equipment can establish a local area network with other equipment such as an RTU (remote terminal unit) through the ZigBee module to realize data uploading. P51 and P52 are ZigBee module jack terminals. The MCU is connected with RX0 and TX0 of the module through serial ports, and configures module parameters or transmits and receives data. The SLEEP _ RQ pin can control the module to SLEEP, achieving the purpose of low power consumption. The Association pin is a network state mark, the SLEEP/ON is a dormant state mark, and the two states are connected to the MCU and prompt a user through an LED lamp.

The circuit working principle of the pumping unit state detector 6 is as follows: when the polished rod of the oil pumping unit runs to the position of an upper dead point (upper stroke dead point) or a lower dead point (lower stroke dead point), the photoelectric switch circuit sends out a signal which is uploaded to the electronic data processor by the transmitting circuit, and the processor analyzes the water content of the state.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.