Starting system and starting method for dielectric property detection device

Abstract

The invention discloses a starting system and method for a dielectric property detection device, and the system comprises the steps: monitoring the real-time temperature of a battery compartment in the dielectric property detection device, comparing the real-time temperature of the battery compartment with a starting temperature threshold value of the battery compartment, and starting the battery compartment when the real-time temperature of the battery compartment is lower than the starting temperature threshold value of the battery compartment. A heater installed in the battery compartment in the auxiliary heating module heats the battery compartment, and when the real-time temperature of the battery compartment reaches the target temperature of the battery compartment, the heater installed in the battery compartment stops heating; and the power management module is used for acquiring the working environment temperature of the battery in the dielectric property detection device, and adjusting the output voltage and current of the battery through the power supply low-temperature compensation circuit according to a preset relation table between the working temperature of the battery and the output voltage and current of the battery. The starting system can be quickly started and stably work in a low-temperature environment, and the detection efficiency and accuracy of the dielectric property detection device can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of electronic detection technology, and specifically to a starting system and a starting method for a dielectric property detection device, and more particularly to a rapid starting system and a starting method for a dielectric property detection device for coil type equipment at low temperature. Background Art

[0002] In low-temperature environments, existing coil-type equipment dielectric properties testing equipment often faces the problem of difficulty in starting up. This is mainly because low temperatures will affect multiple key components of the testing equipment, such as battery performance degradation, lubricating oil solidification, circuit component parameter changes, and mechanical structure shrinkage or jamming. These problems seriously affect the timeliness and accuracy of the testing work, and there is currently no complete solution to effectively solve the low-temperature startup problem of dielectric properties testing equipment. Summary of the invention

[0003] The purpose of the present invention is to address the technical deficiencies in the prior art that have not yet solved the low-temperature starting problem of dielectric performance testing devices, and thus propose a starting system and starting method for dielectric performance testing devices. The starting system reasonably arranges auxiliary heating modules in the battery compartment, transmission mechanism and circuit module of the dielectric performance testing device. The auxiliary heating modules can enable the battery compartment, transmission mechanism and circuit module to quickly reach the target temperature values ​​under low temperature conditions. At the same time, a power management module is installed to ensure that the battery can be safely and effectively preheated at low temperatures. The starting system of the present invention can start quickly and work stably in a low-temperature environment, which can effectively improve the detection efficiency and accuracy of the dielectric performance testing device.

[0004] To achieve this purpose, the first aspect of the present invention proposes a starting system for a dielectric properties testing device, comprising: an auxiliary heating module and a power management module; the auxiliary heating module is used to monitor the real-time temperature of the battery compartment in the dielectric properties testing device, and compare the real-time temperature of the battery compartment with the starting temperature threshold of the battery compartment. When the real-time temperature of the battery compartment is lower than the starting temperature threshold of the battery compartment, the heater installed in the battery compartment in the auxiliary heating module heats the battery compartment, and when the real-time temperature of the battery compartment reaches the target temperature of the battery compartment, the heater installed in the battery compartment stops heating; the power management module is used to obtain the ambient temperature of the battery in the dielectric properties testing device, and adjust the output voltage and current of the battery through the power low temperature compensation circuit according to the preset relationship table between the battery operating temperature and the battery output voltage and current.

[0005] Furthermore, the auxiliary heating module is also used to monitor the real-time temperature of the transmission mechanism in the dielectric properties detection device, and compare the real-time temperature of the transmission mechanism with the starting temperature threshold of the transmission mechanism. When the real-time temperature of the transmission mechanism is lower than the starting temperature threshold of the transmission mechanism, the heater installed in the transmission mechanism in the auxiliary heating module heats the transmission mechanism. When the real-time temperature of the transmission mechanism reaches the target temperature of the transmission mechanism, the heater installed in the transmission mechanism stops heating.

[0006] Furthermore, the auxiliary heating module is also used to monitor the real-time temperature of the circuit module in the dielectric properties detection device, and compare the real-time temperature of the circuit module with the starting temperature threshold of the circuit module. When the real-time temperature of the circuit module is lower than the starting temperature threshold of the circuit module, the heater installed in the circuit module in the auxiliary heating module heats the circuit module. When the real-time temperature of the circuit module reaches the target temperature of the circuit module, the heater installed in the circuit module stops heating.

[0007] Further, the auxiliary heating module includes a heater, a temperature control device and a first temperature sensor, the heater is installed around the battery compartment of the dielectric property testing device, the heater is embedded or attached to the surface of the transmission mechanism of the dielectric property testing device, and the heater is arranged in the circuit module of the dielectric property testing device; the first temperature sensor is respectively installed in the battery compartment, the transmission mechanism and the circuit module of the dielectric property testing device;

[0008] The temperature control device is used to receive the real-time temperature of the battery compartment, transmission mechanism and circuit module output by the first temperature sensor, and compare the real-time temperature of the battery compartment, transmission mechanism and circuit module with the corresponding start temperature threshold. When the real-time temperature of the battery compartment, transmission mechanism and circuit module is lower than the corresponding start temperature threshold, the temperature control device outputs a start heating signal to the heater, and the heater receives the start heating signal and heats the battery compartment, transmission mechanism and circuit module until the battery compartment, transmission mechanism and circuit module reach the corresponding preset temperature. The temperature control device outputs a stop heating signal to the heater, and the heater receives the stop heating signal and stops heating the battery compartment, transmission mechanism and circuit module.

[0009] Furthermore, the power management module includes a temperature adjustment device, a power low temperature compensation circuit and a second temperature sensor, the second temperature sensor is used to collect the operating temperature of the battery, when the operating temperature of the battery is lower than a preset temperature, the battery is preheated by the temperature adjustment device to keep the battery operating temperature above the preset temperature; the power low temperature compensation circuit is used to adjust the output voltage and current of the battery according to the operating temperature of the battery collected by the second temperature sensor and according to a preset relationship table between the battery operating temperature and the battery output voltage and current.

[0010] Further, the power supply low temperature compensation circuit includes a PTAT current generating circuit and a low temperature compensation circuit; the PTAT current generating circuit includes a first current mirror unit, a transistor Q3, a transistor Q4, a resistor R3, and an operational amplifier A1, the first current mirror unit includes a PMOS tube P9 and a PMOS tube P10, in the process of generating the PTAT current, the transistor Q3 is used to receive the bias current generated by the PMOS tube P9, the transistor Q4 is used to receive the bias current generated by the PMOS tube P10, the resistor R3 is used to control the size of the generated PTAT current, the operational amplifier A1 is used to stabilize the voltage of the PTAT current generating circuit through negative feedback, and the first current mirror unit is used to copy the generated PTAT current to the power supply low temperature compensation circuit;

[0011] The low-temperature compensation circuit includes a second current mirror unit, a PMOS tube P17, a PMOS tube P18, an NMOS tube N5, a resistor R6 and a transistor Q6. The second current mirror unit includes a PMOS tube P15 and a PMOS tube P16. In the process of outputting the low-temperature compensation current, the PMOS tube P17 is used to receive the PTAT current generated by the PTAT current generating circuit. The PMOS tube P18 is used to provide a power supply voltage to the NMOS tube N5. The NMOS tube N5 is used to control the generation of the low-temperature compensation current by turning on and off. The resistor R6 is used to control the size of the generated low-temperature compensation current. The transistor Q6 is used to control the on and off of the NMOS tube N5. The second current mirror unit is used to copy the generated low-temperature compensation current to the current circuit of the battery.

[0012] Furthermore, the sources of the PMOS tube P9 and the PMOS tube P10 are connected to the power supply voltage VDD, the gates of the PMOS tube P9 and the PMOS tube P10 are connected to each other, the drain of the PMOS tube P9 is connected to one end of the resistor R3, and the drain of the PMOS tube P10 is connected to the collector of the transistor Q4; the positive input end of the operational amplifier A1 is connected to the drain of the PMOS tube P9, the negative input end of the operational amplifier A1 is respectively connected to the drain of the PMOS tube P10, and the output end of the operational amplifier A1 is connected to the gate of the PMOS tube P9; the other end of the resistor R3 is connected to the collector of the transistor Q3, and the bases and emitters of the transistor Q3 and the transistor Q4 are grounded.

[0013] Furthermore, the sources of the PMOS tubes P15, PMOS tubes P16, PMOS tubes P17 and PMOS tubes P18 are connected to the power supply voltage VDD, the gates of the PMOS tubes P17 and PMOS tubes P18 are connected to each other, and the gate of the PMOS tube P17 is connected to the gate of the PMOS tube P9, and the gate of the PMOS tube P18 is connected to the gate of the PMOS tube P9; the gates of the PMOS tubes P15 and PMOS tubes P16 are connected to each other, and the gates of the NMOS tubes P17 and P18 are connected to each other. The drain of N5 is respectively connected to the gate of PMOS tube P15, the drain of PMOS tube P17 and the drain of PMOS tube P16, the gate of NMOS tube N5 is respectively connected to the drain of PMOS tube P18 and the collector of transistor Q6, the source of NMOS tube N5 is respectively connected to one end of resistor R6 and the base of transistor Q6, the emitter of transistor Q6 and the other end of resistor R6 are both grounded, and the drain of PMOS tube P15 outputs low temperature compensation current to the current circuit of the battery.

[0014] Furthermore, the starting system also includes a self-check and fault warning module, which includes a detection circuit, an audible and visual alarm device, a display screen and a wireless communication module. The detection circuit is respectively connected to the heater, the temperature control device, the first temperature sensor, the second temperature sensor, the battery, the transmission mechanism and the power supply low temperature compensation circuit. The fault signal output end of the detection circuit is connected to the fault signal input end of the audible and visual alarm device. The audible and visual alarm device issues an alarm after receiving the fault signal. The fault signal output end of the detection circuit is connected to the fault signal input end of the display screen. The fault signal output end of the detection circuit is connected to the fault signal input end of the wireless communication module. The wireless communication module sends the fault information to the monitoring terminal.

[0015] Furthermore, the transmission mechanism of the dielectric performance testing device includes a screw, a nut and a gear train, and the circuit module of the dielectric performance testing device includes a power circuit module, a control circuit module, a signal processing circuit module and a power amplifier circuit module. Furthermore, the transmission mechanism of the dielectric performance testing device is coated with lubricating oil with a freezing point of <-40°C.

[0016] Furthermore, the batteries in the battery compartment of the dielectric properties testing device are wrapped by a thermal insulation layer, and the thermal insulation layer is made of aerogel felt or polystyrene foam.

[0017] A second aspect of the present invention provides a method for starting a dielectric property detection device, comprising:

[0018] Monitor the real-time temperature of the battery compartment in the dielectric property detection device, and compare the real-time temperature of the battery compartment with the start-up temperature threshold of the battery compartment. When the real-time temperature of the battery compartment is lower than the start-up temperature threshold of the battery compartment, the heater installed in the battery compartment in the auxiliary heating module heats the battery compartment. When the real-time temperature of the battery compartment reaches the target temperature of the battery compartment, the heater installed in the battery compartment stops heating.

[0019] The power management module is used to obtain the ambient temperature of the battery in the dielectric property detection device, and adjust the output voltage and current of the battery through the power low temperature compensation circuit according to the preset relationship table between the battery operating temperature and the battery output voltage and current.

[0020] Beneficial effects of the present invention:

[0021] The starting system reasonably arranges auxiliary heating modules at key positions of the dielectric performance testing device. The auxiliary heating modules can enable key positions of the dielectric performance testing device to quickly reach target temperature values ​​under low temperature conditions. At the same time, the power management module is installed to ensure that the battery can be preheated safely and effectively at low temperatures. The effective combination of the auxiliary heating module and the power management module solves the problems of battery performance degradation and circuit component parameter changes at low temperatures. In addition, low-temperature toughness materials are used as mechanical structural materials to enable mechanical components to operate normally in low-temperature environments and avoid failures such as jamming. Finally, the pre-start self-test and fault warning module can detect problems and alarm in time, thereby improving the reliability and safety of the dielectric performance testing device when used in low-temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural frame diagram of the dielectric property detection device, power management module, auxiliary heating module and self-checking and fault warning module of the present invention;

[0023] Figure 2 It is a structural frame diagram of the battery in the power management module and the dielectric property detection device of the present invention;

[0024] Figure 3 It is a schematic diagram of a power supply low temperature compensation circuit of the present invention. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0027] Example 1

[0028] The first aspect of the present invention proposes a starting system for a dielectric properties detection device, comprising: an auxiliary heating module and a power management module; the auxiliary heating module is used to monitor the real-time temperature of the battery compartment in the dielectric properties detection device, and compare the real-time temperature of the battery compartment with the starting temperature threshold of the battery compartment. When the real-time temperature of the battery compartment is lower than the starting temperature threshold of the battery compartment, the heater installed in the battery compartment in the auxiliary heating module heats the battery compartment, and when the real-time temperature of the battery compartment reaches the battery compartment target temperature, the heater installed in the battery compartment stops heating; the power management module is used to obtain the ambient temperature of the battery in the dielectric properties detection device, and adjust the output voltage and current of the battery through the power supply low temperature compensation circuit according to the preset relationship table between the battery operating temperature and the battery output voltage and current.

[0029] In the above technical solution, if Figure 1 As shown, the dielectric property detection device includes a battery compartment, a transmission mechanism and a circuit module. Specifically, the dielectric property detection device uses the MIT525 of the British Megger Company. 。 In this article, the transmission mechanism refers to screw rods, nuts, gears and gear trains, etc., which are mechanical structural components in electrical equipment; the circuit module refers to key circuit modules such as power circuit module, control circuit module, signal processing circuit module and power amplifier circuit module.

[0030] In the above technical scheme, PLA alloy material is used as the mechanical structure material of the dielectric properties detection device. Specifically, a special aluminum alloy material is selected to manufacture the shell and frame of the dielectric properties detection device, and a low-temperature alloy steel material is used for moving parts (such as connecting shafts, gears, etc.). In this article, the special aluminum alloy material can be 7000 series aluminum alloy or 6000 series aluminum alloy, and the low-temperature alloy steel material can be ferritic low-temperature steel, low-carbon martensitic low-temperature steel or austenitic low-temperature steel.

[0031] In the above technical scheme, a lubricating oil with a freezing point of <-40°C is applied to the transmission mechanism of the dielectric properties detection device. The low-temperature lubricating oil with a freezing point of <-40°C can still maintain good fluidity and lubricity at low temperatures, which can ensure the normal operation of mechanical parts in a low-temperature environment, reduce wear, jamming and other faults caused by insufficient lubrication, and extend the service life of the equipment. For example, the lubricating oil can be Dechi -40°C low-temperature noise reduction lubricating oil. Specifically, the lubricating oil also contains antifreeze additives and extreme pressure anti-wear agents. The antifreeze additives can be ethylene glycol or propylene glycol. The main function of the antifreeze additives is to lower the freezing point of the liquid so that it remains liquid in a low-temperature environment. This is very critical for cooling media, lubricating media, etc. in equipment or systems used in cold areas, and can also prevent ice expansion damage; the extreme pressure anti-wear agent can be sulfided olefins or dibenzyl disulfide. The extreme pressure anti-wear agent can improve the load-bearing capacity and reduce wear, extend the service life of mechanical parts, and improve the reliability and operation efficiency of the equipment.

[0032] In the above technical solution, the auxiliary heating module is also used to monitor the real-time temperature of the transmission mechanism in the dielectric properties detection device, and compare the real-time temperature of the transmission mechanism with the starting temperature threshold of the transmission mechanism. When the real-time temperature of the transmission mechanism is lower than the starting temperature threshold of the transmission mechanism, the heater installed in the transmission mechanism in the auxiliary heating module heats the transmission mechanism. When the real-time temperature of the transmission mechanism reaches the target temperature of the transmission mechanism, the heater installed in the transmission mechanism stops heating.

[0033] In the above technical solution, the auxiliary heating module is also used to monitor the real-time temperature of the circuit module in the dielectric properties detection device, and compare the real-time temperature of the circuit module with the starting temperature threshold of the circuit module. When the real-time temperature of the circuit module is lower than the starting temperature threshold of the circuit module, the heater installed in the circuit module in the auxiliary heating module heats the circuit module. When the real-time temperature of the circuit module reaches the target temperature of the circuit module, the heater installed in the circuit module stops heating.

[0034] In the above technical solution, the auxiliary heating module includes a heater, a temperature control device and a first temperature sensor. Figure 1As shown, the heater is installed in a surrounding manner around the battery compartment of the dielectric property detection device so that the battery can be heated evenly, the heater is embedded or attached to the screw rod and guide rail of the transmission mechanism of the dielectric property detection device, and the heater is arranged on the circuit module of the dielectric property detection device to ensure effective heating of the circuit; in this article, the heater is a PTC thermistor heater, and the resistance of the PTC thermistor heater increases when the temperature rises, and it can automatically limit the current and temperature. This self-regulating property is very effective in preventing overheating; the specific method of arranging the heater on the circuit module of the dielectric property detection device is, for example: select a small-sized ceramic heating plate or a polyimide heating plate, and attach it to the surface of the circuit module, such as on the heat sink of the voltage regulator chip in the power circuit module or the shell surface of the microcontroller in the control circuit module. This heating plate is usually very thin and can fit tightly, with high heat transfer efficiency, and its heating power can be accurately controlled by the control circuit to avoid excessive heating.

[0035] The first temperature sensor is installed in the battery compartment, transmission mechanism and circuit module of the dielectric properties detection device respectively. The first temperature sensor is the information acquisition front end of the temperature control device, responsible for real-time and accurate measurement of the temperature of the environment or equipment. The first temperature sensor converts the physical change of temperature into a processable signal form such as an electrical signal, providing a data basis for subsequent temperature control. The first temperature sensor is mainly composed of a sensitive element, a housing and packaging, a connecting wire and an interface. The accuracy of the first temperature sensor is ±0.1°C, and different preset target temperatures can be set according to different parts. Specifically, the first temperature sensor uses AS6221 from AMS OSRAM of Germany.

[0036] The temperature control device is connected to the first temperature sensor to obtain the temperature data of the key parts of the dielectric property detection device (battery compartment, transmission mechanism and circuit module) in real time, and compares it with the internally stored startup temperature threshold and the target temperature values ​​of different parts. If the temperature is lower than the startup temperature threshold, a suitable control signal is output to the heater to start heating. The heater in the battery compartment gradually increases the battery temperature to improve the battery activity. The heater in the transmission mechanism prevents the lubricating oil from solidifying and ensures the flexibility of the transmission parts. The heater near the circuit module maintains the circuit elements at a suitable temperature to ensure their normal performance; if the temperature reaches or exceeds the target temperature value, the heater power is cut off; during the heating process, temperature feedback is continuously received, and if the temperature change does not meet expectations, the control signal is fine-tuned. The control algorithm can also be optimized based on the accumulation of multiple heating data. At the same time, the faults of the first temperature sensor and the heater can be detected. When a problem occurs, an alarm can be given and safety measures such as stopping the heater can be taken. The main structure of the temperature control device is a temperature sensor, a signal conversion unit (A / D conversion unit), a microprocessor, a drive unit and a communication unit. Specifically, the temperature control device uses an AI526P intelligent temperature controller.

[0037] In the above technical solution, if Figure 2 As shown, the power management module includes a temperature regulating device, a power low temperature compensation circuit and a second temperature sensor. The temperature regulating device and the insulation layer are closely attached. Such a layout can make the heat generated by the temperature regulating device be more efficiently transferred to the battery, reduce the heat loss during the transfer process, and improve the effect and efficiency of temperature regulation; the temperature regulating device is connected to the battery electrode in the dielectric performance detection device, and the temperature regulating device is used to preheat the battery in the dielectric performance detection device through a small current. The small current slowly increases the battery temperature, accelerates the internal chemical reaction of the battery, and gradually restores the battery's discharge capacity at low temperatures, ensuring that the battery can provide sufficient power for the detection equipment to start. Specifically, the temperature regulating device is mainly composed of a controller, a temperature sensor and a PTC thermistor. For example, the temperature regulating device uses the TQD-6411 of the Taiquan Electric Intelligent Temperature Controller. The conventional operating temperature range of existing batteries is above -20°C, so when the temperature is lower than -20°C, the system will be preheated when it is turned on. When the temperature feedback temperature of the temperature regulating device is above -20°C, the battery's discharge capacity at low temperatures can be restored.

[0038] In the above technical solution, the thermal insulation layer wraps the battery in the dielectric properties detection device. Specifically, the thermal insulation layer adopts aerogel felt or polystyrene foam (EPS). EPS is a porous lightweight material with a large number of closed honeycomb pores inside. These pores are evenly distributed inside the material to form a good thermal insulation structure. The thermal insulation structure is relatively stable. During normal use, the pores will not easily break or deform, and the thermal insulation performance can be maintained for a long time. From a microscopic level, each bubble of EPS is like a tiny insulation unit with air enclosed in it. Since air is a poor conductor of heat, the still air in a large number of bubbles greatly hinders the transfer of heat.

[0039] In the above technical solution, the power supply low temperature compensation circuit adjusts the output voltage and current of the battery according to the operating temperature of the battery collected by the second temperature sensor and according to the preset relationship table between the battery operating temperature and the battery output voltage and current, so that the output voltage and current of the battery match the ambient temperature.

[0040] In the above technical solution, the circuit diagram of the power supply low temperature compensation circuit is as follows Figure 3 As shown, the power supply low temperature compensation circuit includes a PTAT current generating circuit and a low temperature compensation circuit; the PTAT current generating circuit includes a first current mirror unit, a transistor Q3, a transistor Q4, a resistor R3, and an operational amplifier A1, the first current mirror unit includes a PMOS tube P9 and a PMOS tube P10, in the process of generating the PTAT current, the transistor Q3 is used to receive the bias current generated by the PMOS tube P9, the transistor Q4 is used to receive the bias current generated by the PMOS tube P10, the resistor R3 is used to control the size of the generated PTAT current, the operational amplifier A1 is used to stabilize the voltage of the PTAT current generating circuit through negative feedback, and the first current mirror unit is used to copy the generated PTAT current to the power supply low temperature compensation circuit The low temperature compensation circuit includes a second current mirror unit, a PMOS tube P17, a PMOS tube P18, an NMOS tube N5, a resistor R6 and a transistor Q6. The second current mirror unit includes a PMOS tube P15 and a PMOS tube P16. In the process of outputting the low temperature compensation current, the PMOS tube P17 is used to receive the PTAT current generated by the PTAT current generating circuit. The PMOS tube P18 is used to provide a power supply voltage to the NMOS tube N5. The NMOS tube N5 is used to control the generation of the low temperature compensation current by turning on and off. The resistor R6 is used to control the size of the generated low temperature compensation current. The transistor Q6 is used to control the on and off of the NMOS tube N5. The second current mirror unit is used to copy the generated low temperature compensation current to the current circuit of the battery.

[0041] In the above technical solution, the sources of the PMOS tubes P9 and P10 are connected to the power supply voltage VDD, the gates of the PMOS tubes P9 and P10 are connected to each other, the drain of the PMOS tube P9 is connected to one end of the resistor R3, and the drain of the PMOS tube P10 is connected to the collector of the transistor Q4; the positive input end of the operational amplifier A1 is connected to the drain of the PMOS tube P9, the negative input end of the operational amplifier A1 is respectively connected to the drain of the PMOS tube P10, and the output end of the operational amplifier A1 is connected to the gate of the PMOS tube P9; the other end of the resistor R3 is connected to the collector of the transistor Q3, and the bases and emitters of the transistor Q3 and the transistor Q4 are grounded.

[0042] In the above technical solution, the sources of the PMOS tubes P15, PMOS tubes P16, PMOS tubes P17 and PMOS tubes P18 are connected to the power supply voltage VDD, the gates of the PMOS tubes P17 and PMOS tubes P18 are connected to each other, and the gate of the PMOS tube P17 is connected to the gate of the PMOS tube P9, and the gate of the PMOS tube P18 is connected to the gate of the PMOS tube P9; the gates of the PMOS tubes P15 and PMOS tubes P16 are connected to each other, and the gates of the NMOS tubes P17 and P18 are connected to each other. The drain of the transistor N5 is respectively connected to the gate of the PMOS transistor P15, the drain of the PMOS transistor P17 and the drain of the PMOS transistor P16, the gate of the NMOS transistor N5 is respectively connected to the drain of the PMOS transistor P18 and the collector of the transistor Q6, the source of the NMOS transistor N5 is respectively connected to one end of the resistor R6 and the base of the transistor Q6, the emitter of the transistor Q6 and the other end of the resistor R6 are both grounded, and the drain of the PMOS transistor P15 outputs a low-temperature compensation current to the current circuit of the battery.

[0043] The working process of the power supply low temperature compensation circuit is as follows: when the power supply voltage VDD is powered on, the input end of the operational amplifier A1 is clamped, the voltages at both ends are equal, the negative feedback of the operational amplifier A1 improves the stability of the circuit structure, the PMOS tube P9 provides a bias current to the transistor Q3, the PMOS tube P10 provides a bias current to the transistor Q4, the width-to-length ratio of the PMOS tube P9 and the PMOS tube P10 is the same, and the ratio of the emitter junction area of ​​the transistor Q3 to the emitter junction area of ​​the transistor Q4 is N, and the voltage on the resistor R3 is ΔV BE , and this voltage is the PTAT voltage, the current flowing through the resistor R3 is the PTAT current, then the relationship between the PTAT current is as follows:

[0044] I C3 =I C4

[0045] In the formula, I c3is the bias current flowing through transistor Q3, I c4 is the bias current flowing through transistor Q4;

[0046] ΔV BE =V BE3 -V BE4 =V T n

[0047] Where ΔV BE is the voltage on resistor R3, V BE3 is the voltage on transistor Q3, V BE4 is the voltage on transistor Q4, V T is the voltage equivalent of temperature, and its calculation formula is V T = kT / q, where k is the Boltzmann constant, T is the thermodynamic temperature, and q is the electron charge. At room temperature (such as 300K), V T The approximate value of is 26mV, and N is the ratio of the emitter junction area of ​​transistor Q3 to the emitter junction area of ​​transistor Q4;

[0048]

[0049] In the formula, I PTAT is the current flowing through resistor R3, ΔV BE is the voltage on resistor R3, R3 is the resistance of resistor R3, V T is the voltage equivalent of temperature, and N is the ratio of the emitter junction area of ​​transistor Q3 to the emitter junction area of ​​transistor Q4.

[0050] Generated I PTAT The magnitude of the current can be controlled by the resistor R3, and the current is copied to the low temperature compensation circuit through the second current mirror unit; specifically, the PTAT current is copied to the drain of the PMOS tube P17 through the second current mirror unit. When the temperature is low, the drain of the PMOS tube P18 is at a high potential. At this time, the NMOS tube N5 is turned on, and the current flowing through the resistor R6 is V BE6 / R6, due to V BE6 It is a negative temperature coefficient voltage, so the current is a negative temperature coefficient current; because there are two currents flowing through the drain of the NMOS tube N5, one of which is the drain current of the PMOS tube P17, which is αI PTAT , α is the mirror ratio of the second current mirror unit, and the current flowing through the source of NMOS tube N5 is V BE6 / R6, another current flowing through the drain of NMOS tube N5 is the low temperature compensation current I lowtemp , whose value is:

[0051] I lowtemp =V BE6 / R6-I PTAP

[0052] When the temperature is high, the base voltage of transistor Q6 increases, and transistor Q6 is turned on, and the collector of transistor Q6 is pulled down to a low potential. At this time, NMOS tube N5 is turned off, and the low temperature compensation circuit does not work.

[0053] Low temperature compensation current I lowtemp The second current mirror unit composed of PMOS tube P15 and PMOS tube P16 is copied to the current circuit of the battery, and the current size can be controlled by resistor R6. The power supply low temperature compensation circuit is calibrated and parameterized, and the compensation ratio of voltage and current is determined according to different low temperature ranges (such as -20℃, -30℃, -40℃, etc.), for example, the voltage is increased by 10% at -20℃, 12.5% ​​at -25℃, 15% at -30℃, 20% at -40℃, 25% at -45℃, and 30% at -50℃. The specific adjustment parameters compensate for the increased resistance of the circuit components due to low temperature to ensure the power required for normal startup of the circuit; however, when the temperature is high, the base voltage of the transistor Q6 increases, and the transistor Q6 is turned on at this time, and the collector of the transistor Q6 is pulled down to a low potential, and the NMOS tube N5 is turned off at this time, and the low temperature compensation circuit does not work.

[0054] In the above technical solution, the starting system further includes a self-checking and fault warning module, which is used to check the working status of the heater, the temperature control device, the first temperature sensor, the second temperature sensor, the battery, the transmission mechanism and the power supply low temperature compensation circuit before starting, and issue an alarm and fault information in case of failure. For example, the self-checking and fault warning module can be AIM-T300 of Ankerui Electric Co., Ltd.

[0055] In the above technical solution, the self-check and fault warning module includes a detection circuit, an audible and visual alarm device, a display screen and a wireless communication module. The detection circuit is respectively connected to the heater, the temperature control device, the first temperature sensor, the second temperature sensor, the battery, the transmission mechanism and the power supply low temperature compensation circuit. The fault signal output end of the detection circuit is connected to the fault signal input end of the audible and visual alarm device. The audible and visual alarm device issues an alarm after receiving the fault signal. The fault signal output end of the detection circuit is connected to the fault signal input end of the display screen. The fault signal output end of the detection circuit is connected to the fault signal input end of the wireless communication module. The wireless communication module sends the fault information to the monitoring terminal.

[0056] The working process of the starting system for the dielectric property detection device of the present invention is as follows:

[0057] (I) Initialization settings:

[0058] Initialize the temperature control device, set the start temperature threshold (-10°C), and set preset temperatures for the battery compartment, transmission mechanism, circuit module, etc. according to the requirements of different key parts; set parameters for the temperature adjustment device to determine the current size and preheating time of the small current preheating;

[0059] Calibrate and set parameters for the low temperature compensation circuit of the power supply, determine the compensation ratio of voltage and current according to different low temperature ranges (such as -20℃, -30℃, -40℃, etc.), and adjust the specific parameters of the voltage increase by 10% at -20℃, 15% at -30℃, and 20% at -40℃;

[0060] Initialize the self-test and fault warning module, set the detection sequence and parameter range of the self-test program, such as the normal range of battery voltage, the judgment standard of the working status of the heating element, the detection threshold of the smoothness of movement of mechanical parts, etc., and pair the self-test and fault warning module with the remote monitoring terminal and configure the network connection.

[0061] (II) Low temperature start-up process stage:

[0062] Temperature monitoring and heating start

[0063] When the dielectric property detection device is in a low temperature environment, the first temperature sensor monitors the temperature of each key part (battery compartment, transmission mechanism and circuit module) in real time, and transmits the real-time temperature data to the temperature control device. Once the first temperature sensor detects that the temperature is lower than the start temperature threshold, the temperature control device starts the heater, and the heater starts to heat the key parts such as the battery compartment, transmission mechanism and circuit module;

[0064] Power Management and Battery Preheating

[0065] The temperature regulating device starts to work, preheating the battery through a small current, and the small current slowly increases the battery temperature;

[0066] The power supply low temperature compensation circuit runs at the same time, and automatically adjusts the power supply output voltage and current according to the ambient temperature information fed back by the second temperature sensor. When the second temperature sensor detects that the ambient temperature is -20°C, the power supply low temperature compensation circuit increases the power supply output voltage by 10% according to the preset parameters; when it is -30°C, the power supply low temperature compensation circuit increases the power supply output voltage by 15% according to the preset parameters; when it is -40°C, the power supply low temperature compensation circuit increases the power supply output voltage by 20% according to the preset parameters;

[0067] Temperature control and heating stop

[0068] During the heating process, the temperature control device continuously receives the real-time temperature data output by the first temperature sensor. When the temperature of each key part reaches the preset temperature, the temperature control device automatically stops the heater from heating. For example, when the battery compartment temperature reaches above 0°C, the transmission mechanism temperature reaches the temperature at which the lubricating oil can work normally, and the circuit module temperature reaches the temperature at which the components can start and initially run normally, the heating is stopped to avoid excessive heating causing energy waste or adverse effects on components.

[0069] (III) Pre-startup self-test and troubleshooting stage:

[0070] Pre-boot self-test execution

[0071] When the heating stops, the self-check and fault warning module starts the self-check program. The self-check program first checks whether the heating element stops working normally and whether there is abnormal heating or damage. Then it checks the working status of the temperature control module, including the accuracy of the temperature sensor data, whether the control algorithm is operating normally, and the effectiveness of the heater control. Then it checks the battery status in detail, including parameters such as battery voltage and internal resistance, to determine whether the battery is in a state where it can be started normally and whether the battery power meets the starting requirements. It also checks the power circuit to confirm whether the power low temperature compensation circuit has correctly adjusted the voltage and current, and whether there are short circuits, open circuits or other faults in the circuit. Finally, it checks the mechanical moving parts, and uses sensors to detect the movement status of components such as screw rods, guide rails, gears, and connecting shafts to determine whether there is jamming, excessive friction, or other mechanical faults.

[0072] Fault warning and handling

[0073] If the self-test program detects any abnormal situation, the self-test and fault warning module will immediately sound an alarm through the sound and light alarm device. At the same time, the specific fault information, such as "battery voltage is too low", "transmission mechanism is stuck", "circuit short circuit", etc., will be displayed in detail on the display screen of the detection equipment, so that the on-site operators can quickly understand the problem;

[0074] The self-check and fault warning module sends the fault information to the remote monitoring terminal through the wireless communication module (Bluetooth), and the remote operator can also obtain the fault situation in time. If the fault does not affect the key link of startup, the operator can choose to try to start through the operation interface after receiving the alarm information. The system continuously monitors and records relevant data during the startup process. If a more serious problem occurs, the alarm will be issued again; if the fault seriously affects the startup safety, the operator must first eliminate the fault and then start the detection equipment.

[0075] (IV) Operation and monitoring phase:

[0076] Normal operation monitoring

[0077] During the normal operation of the dielectric property detection device, the startup system for the dielectric property detection device of the present invention continuously monitors the temperature, battery status, circuit parameters and the operation of mechanical components, and the first temperature sensor and the second temperature sensor respectively monitor the temperature of the key parts and the ambient temperature in real time. If the temperature of the key parts drops again to a temperature close to the startup temperature threshold (2-3°C different from the startup temperature threshold), the temperature control device can start the heater again to maintain a suitable operating temperature to ensure the stable performance of the dielectric property detection device;

[0078] The power management module continuously monitors parameters such as battery power and temperature. When the battery power is too low, it can issue a low-power reminder. The power supply low-temperature compensation circuit continuously adjusts the output parameters according to temperature changes to ensure stable power supply of the circuit. At the same time, the mechanical component operation sensor monitors the status of the moving parts in real time, and promptly alarms if abnormal wear, increased vibration, etc. occur.

[0079] Abnormal situation handling

[0080] For any abnormal situation that occurs during operation, such as a sudden temperature drop, battery failure, abnormal change in circuit parameters or mechanical component failure, the starting system described in the present invention can monitor and record relevant data in real time. Once an abnormality is detected, an alarm is immediately sounded through the sound and light alarm device, and the fault information is displayed on the display screen. At the same time, the information is sent to the remote monitoring terminal. According to the severity of the fault, the system can automatically take corresponding protection measures, such as emergency stop of detection operation, switching to backup power supply or entering safety protection mode, to avoid further damage to the detection equipment and wait for the operator to handle it.

[0081] Example 2

[0082] A second aspect of the present invention provides a method for starting a dielectric property detection device, comprising:

[0083] The real-time temperature of the battery compartment in the dielectric properties testing device is monitored, and the real-time temperature of the battery compartment is compared with the starting temperature threshold of the battery compartment. When the real-time temperature of the battery compartment is lower than the starting temperature threshold of the battery compartment, the heater installed in the battery compartment in the auxiliary heating module heats the battery compartment. When the real-time temperature of the battery compartment reaches the target temperature of the battery compartment, the heater installed in the battery compartment stops heating. The power management module is used to obtain the ambient temperature of the battery in the dielectric properties testing device, and adjust the output voltage and current of the battery through the power low temperature compensation circuit according to the preset relationship table between the battery operating temperature and the battery output voltage and current.

[0084] The starting system of the present invention comprises an auxiliary heating module, a power management module and a self-check and fault warning module. The auxiliary heating module is to set a heater and a high-precision temperature sensor at the key parts (battery compartment, transmission mechanism and circuit module) of the dielectric property detection device, and through cooperation with the temperature control device, the key parts of the dielectric property detection device can be quickly reached to the target temperature value under low temperature conditions. The power management module effectively solves the problems of battery performance degradation and circuit element parameter changes under low temperature. At the same time, the use of low-temperature toughness materials and low-temperature lubricating oil in the mechanical structure of the dielectric property detection device can make the mechanical parts operate normally in a low-temperature environment and avoid failures such as jamming. The auxiliary heating module and the power management module cooperate with each other to ensure the smooth start-up of the dielectric property detection device. Finally, the self-check and fault warning module can detect problems and alarm in time, thereby improving the reliability and safety of the dielectric property detection device when used in a low-temperature environment.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

[0086] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A starting system for a dielectric property detection device, characterized in that: include: Auxiliary heating module and power management module; The auxiliary heating module is used to monitor the real-time temperature of the battery compartment in the dielectric property detection device, and compare the real-time temperature of the battery compartment with the start-up temperature threshold of the battery compartment. When the real-time temperature of the battery compartment is lower than the start-up temperature threshold of the battery compartment, the heater installed in the battery compartment in the auxiliary heating module heats the battery compartment. When the real-time temperature of the battery compartment reaches the target temperature of the battery compartment, the heater installed in the battery compartment stops heating. The power management module is used to obtain the ambient temperature of the battery in the dielectric property detection device, and adjust the output voltage and current of the battery through the power low temperature compensation circuit according to the preset relationship table between the battery operating temperature and the battery output voltage and current.

2. The starting system for a dielectric property detection device according to claim 1, characterized in that: The auxiliary heating module is also used to monitor the real-time temperature of the transmission mechanism in the dielectric properties detection device, and compare the real-time temperature of the transmission mechanism with the starting temperature threshold of the transmission mechanism. When the real-time temperature of the transmission mechanism is lower than the starting temperature threshold of the transmission mechanism, the heater installed in the transmission mechanism in the auxiliary heating module heats the transmission mechanism. When the real-time temperature of the transmission mechanism reaches the target temperature of the transmission mechanism, the heater installed in the transmission mechanism stops heating.

3. The starting system for a dielectric property detection device according to claim 2, characterized in that: The auxiliary heating module is also used to monitor the real-time temperature of the circuit module in the dielectric properties detection device, and compare the real-time temperature of the circuit module with the starting temperature threshold of the circuit module. When the real-time temperature of the circuit module is lower than the starting temperature threshold of the circuit module, the heater installed in the circuit module in the auxiliary heating module heats the circuit module. When the real-time temperature of the circuit module reaches the target temperature of the circuit module, the heater installed in the circuit module stops heating.

4. The starting system for a dielectric property detection device according to claim 3, characterized in that: The auxiliary heating module includes a heater, a temperature control device and a first temperature sensor. The heater is installed around the battery compartment of the dielectric property detection device, the heater is embedded or attached to the surface of the transmission mechanism of the dielectric property detection device, and the heater is arranged on the circuit module of the dielectric property detection device; The first temperature sensor is installed in the battery compartment, the transmission mechanism and the circuit module of the dielectric property detection device respectively; The temperature control device is used to receive the real-time temperature of the battery compartment, transmission mechanism and circuit module output by the first temperature sensor, and compare the real-time temperature of the battery compartment, transmission mechanism and circuit module with the corresponding start temperature threshold. When the real-time temperature of the battery compartment, transmission mechanism and circuit module is lower than the corresponding start temperature threshold, the temperature control device outputs a start heating signal to the heater, and the heater receives the start heating signal and heats the battery compartment, transmission mechanism and circuit module until the battery compartment, transmission mechanism and circuit module reach the corresponding preset temperature. The temperature control device outputs a stop heating signal to the heater, and the heater receives the stop heating signal and stops heating the battery compartment, transmission mechanism and circuit module.

5. The starting system for a dielectric property detection device according to claim 4, characterized in that: The power management module includes a temperature adjustment device, a power low temperature compensation circuit and a second temperature sensor, wherein the second temperature sensor is used to collect the working temperature of the battery. When the working temperature of the battery is lower than a preset temperature, the battery is preheated by the temperature adjustment device to keep the working temperature of the battery above the preset temperature. The power supply low temperature compensation circuit is used to adjust the output voltage and current of the battery according to the operating temperature of the battery collected by the second temperature sensor and according to a preset relationship table between the battery operating temperature and the battery output voltage and current.

6. The starting system for a dielectric property detection device according to claim 5, characterized in that: The power supply low temperature compensation circuit includes a PTAT current generating circuit and a low temperature compensation circuit; The PTAT current generating circuit includes a first current mirror unit, a transistor Q3, a transistor Q4, a resistor R3, and an operational amplifier A1. The first current mirror unit includes a PMOS tube P9 and a PMOS tube P10. In the process of generating the PTAT current, the transistor Q3 is used to receive the bias current generated by the PMOS tube P9, the transistor Q4 is used to receive the bias current generated by the PMOS tube P10, the resistor R3 is used to control the magnitude of the generated PTAT current, the operational amplifier A1 is used to stabilize the voltage of the PTAT current generating circuit through negative feedback, and the first current mirror unit is used to copy the generated PTAT current to the power supply low temperature compensation circuit; The low-temperature compensation circuit includes a second current mirror unit, a PMOS tube P17, a PMOS tube P18, an NMOS tube N5, a resistor R6 and a transistor Q6. The second current mirror unit includes a PMOS tube P15 and a PMOS tube P16. In the process of outputting the low-temperature compensation current, the PMOS tube P17 is used to receive the PTAT current generated by the PTAT current generating circuit. The PMOS tube P18 is used to provide a power supply voltage to the NMOS tube N5. The NMOS tube N5 is used to control the generation of the low-temperature compensation current by turning on and off. The resistor R6 is used to control the size of the generated low-temperature compensation current. The transistor Q6 is used to control the on and off of the NMOS tube N5. The second current mirror unit is used to copy the generated low-temperature compensation current to the current circuit of the battery.

7. The starting system for a dielectric property detection device according to claim 6, characterized in that: The sources of the PMOS tubes P9 and P10 are connected to the power supply voltage VDD, the gates of the PMOS tubes P9 and P10 are connected to each other, the drain of the PMOS tube P9 is connected to one end of the resistor R3, and the drain of the PMOS tube P10 is connected to the collector of the transistor Q4; The positive input terminal of the operational amplifier A1 is connected to the drain of the PMOS tube P9, the negative input terminal of the operational amplifier A1 is connected to the drain of the PMOS tube P10, and the output terminal of the operational amplifier A1 is connected to the gate of the PMOS tube P9; The other end of the resistor R3 is connected to the collector of the transistor Q3 , and the base and emitter of the transistor Q3 and the transistor Q4 are both grounded.

8. The starting system for a dielectric property detection device according to claim 7, characterized in that: The sources of the PMOS tubes P15, PMOS tubes P16, PMOS tubes P17 and PMOS tubes P18 are connected to the power supply voltage VDD, the gates of the PMOS tubes P17 and PMOS tubes P18 are connected to each other, the gate of the PMOS tube P17 is connected to the gate of the PMOS tube P9, and the gate of the PMOS tube P18 is connected to the gate of the PMOS tube P9; The gates of the PMOS tube P15 and the PMOS tube P16 are connected to each other, the drain of the NMOS tube N5 is respectively connected to the gate of the PMOS tube P15, the drain of the PMOS tube P17 and the drain of the PMOS tube P16, the gate of the NMOS tube N5 is respectively connected to the drain of the PMOS tube P18 and the collector of the transistor Q6, the source of the NMOS tube N5 is respectively connected to one end of the resistor R6 and the base of the transistor Q6, the emitter of the transistor Q6 and the other end of the resistor R6 are both grounded, and the drain of the PMOS tube P15 outputs a low-temperature compensation current to the current circuit of the battery.

9. The starting system for a dielectric property detection device according to claim 8, characterized in that: The starting system also includes a self-check and fault warning module, which includes a detection circuit, an audible and visual alarm device, a display screen and a wireless communication module. The detection circuit is respectively connected to the heater, the temperature control device, the first temperature sensor, the second temperature sensor, the battery, the transmission mechanism and the power supply low temperature compensation circuit. The fault signal output end of the detection circuit is connected to the fault signal input end of the audible and visual alarm device. The audible and visual alarm device issues an alarm after receiving the fault signal. The fault signal output end of the detection circuit is connected to the fault signal input end of the display screen. The fault signal output end of the detection circuit is connected to the fault signal input end of the wireless communication module. The wireless communication module sends the fault information to the monitoring terminal.

10. The starting system for a dielectric property detection device according to claim 1, characterized in that: The transmission mechanism of the dielectric property detection device includes a screw, a nut and a gear system, and the circuit module of the dielectric property detection device includes a power circuit module, a control circuit module, a signal processing circuit module and a power amplification circuit module.

11. The starting system for a dielectric property detection device according to claim 10, characterized in that: The transmission mechanism of the dielectric property detection device is coated with lubricating oil with a freezing point of <-40°C.

12. The starting system for a dielectric property detection device according to claim 1, characterized in that: The batteries in the battery compartment of the dielectric property detection device are wrapped by a thermal insulation layer, and the thermal insulation layer is made of aerogel felt or polystyrene foam.

13. A method for starting a dielectric property detection device, characterized in that: include: Monitor the real-time temperature of the battery compartment in the dielectric property detection device, and compare the real-time temperature of the battery compartment with the start-up temperature threshold of the battery compartment. When the real-time temperature of the battery compartment is lower than the start-up temperature threshold of the battery compartment, the heater installed in the battery compartment in the auxiliary heating module heats the battery compartment. When the real-time temperature of the battery compartment reaches the target temperature of the battery compartment, the heater installed in the battery compartment stops heating. The power management module is used to obtain the ambient temperature of the battery in the dielectric property detection device, and adjust the output voltage and current of the battery through the power low temperature compensation circuit according to the preset relationship table between the battery operating temperature and the battery output voltage and current.

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