Temperature detection device and power distribution cabinet

Abstract

The utility model discloses a temperature detection device and a power distribution cabinet. The temperature detection device comprises a voltage conversion module, a power management module, a processing module and at least one temperature detection module. The voltage conversion module comprises a voltage conversion unit; the voltage conversion unit comprises a first voltage conversion group and a second voltage conversion group, each voltage conversion group comprises a plurality of voltage conversion subunits which are connected in series, and each voltage conversion subunit comprises at least two first resistors which are connected in parallel; the voltage conversion module is connected with the power management module, and the voltage conversion module is configured to convert a power supply voltage into a first power supply voltage; the power management module is connected with the processing module; the processing module is connected with the temperature detection module; the power management module is configured to supply power to the processing module based on the first power voltage; the processing module is configured to enable at least one temperature detection module and obtain temperature information collected by the temperature detection module. The temperature detection device is small in size and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature detection technical field especially relates to a temperature detection device and distribution cabinet. BACKGROUND

[0002] At present in the distribution, industrial field, need real -time collection various types of terminal or cable, current copper row surface temperature, need to use temperature measurement sensor.

[0003] Temperature measurement sensor includes passive wireless temperature measurement sensor and active wireless temperature measurement sensor, and the data measured by passive wireless temperature measurement sensor and active wireless temperature measurement sensor is transmitted to information collection terminal by wireless communication.

[0004] Passive temperature measurement sensor product does not have battery, and obtains energy from the measured environment by radio frequency power taking or temperature difference power taking, and does not need to apply power supply from outside to the product.Active temperature measurement sensor product has battery or introduces power supply from outside to power active temperature measurement sensor.There are multiple ways to introduce power supply from outside to power temperature measurement sensor, including mains power supply, and mains power is converted into low-voltage direct-current voltage power supply using power adapter.The way of using mains power supply generally needs temperature measurement sensor internal circuit integration to convert mains power into low-voltage direct-current circuit.However, the voltage conversion circuit of the existing temperature measurement sensor is large in size, occupies the area of printed circuit board and product volume, is not conducive to miniaturization of temperature measurement product, and is high in cost. CONTENT OF UTILITY MODEL

[0005] The utility model provides a kind of temperature detection device and distribution cabinet, to solve the problem of the volume of existing temperature measurement sensor is large, cost is higher.

[0006] According to an aspect of the utility model, a kind of temperature detection device is provided, and temperature detection device includes: voltage conversion module, power management module, processing module and at least one temperature detection module;

[0007] The voltage conversion module includes voltage conversion unit;The voltage conversion unit includes first group of voltage conversion group and second group of voltage conversion group, and the voltage conversion group includes multiple voltage conversion subunits connected in series, and the voltage conversion subunit includes at least two first resistors connected in parallel;

[0008] The voltage conversion module is connected with the power management module, and the voltage conversion module is configured to convert supply voltage into first power voltage;

[0009] The power management module is connected with the processing module; the power management module is configured to supply power for the processing module based on the first power voltage; the processing module is connected with the temperature detection module; the processing module is configured to enable at least one temperature detection module and acquire temperature information collected by the temperature detection module.

[0010] Optionally, a first end of the first group of voltage conversion groups is connected with a first power line, and a second end of the first group of voltage conversion groups is connected with the power management module;

[0011] A first end of the second group of voltage conversion groups is connected with a second power line, and a second end of the second group of voltage conversion groups is connected with a second power voltage.

[0012] Optionally, the power management module comprises an energy storage unit, a voltage division unit, a voltage stabilization unit and a switching unit;

[0013] A first end of the energy storage unit is connected with the first power voltage, and a second end of the energy storage unit is connected with a second power voltage;

[0014] An enable end of the voltage stabilization unit is connected with the first end of the energy storage unit through the voltage division unit, and an output end of the voltage stabilization unit is connected with a power end of the temperature detection module through the switching unit;

[0015] The power end of the processing module is connected with the output end of the voltage stabilization unit; the processing module is connected with an enable end of the switching unit; the voltage stabilization unit is configured to output a third power voltage to the power end of the processing module when an output voltage of the voltage division unit reaches a first threshold voltage;

[0016] The processing module is connected with the output voltage of the voltage division unit; the processing module is configured to output an enable signal to the switching unit when a voltage of the energy storage unit reaches a second threshold voltage; the switching unit is configured to output a fourth power voltage to a first end of at least one temperature detection module based on the third power voltage in response to the enable signal; and the processing module is further configured to acquire temperature information collected by the temperature detection module.

[0017] Optionally, the temperature detection module comprises a temperature sensor, a pluggable interface, a second resistor and a third resistor;

[0018] A first end of the temperature sensor is pluggably connected with a first end of the pluggable interface, and a second end of the temperature sensor is pluggably connected with a second end of the pluggable interface;

[0019] A first end of the second resistor is connected with the switching unit, and a second end of the second resistor is connected with the first end of the pluggable interface through the third resistor.

[0020] The second end of the pluggable interface accesses the second power supply voltage;

[0021] The second end of the second resistor is connected with the processing module.

[0022] Optionally, the temperature detection module further comprises a fourth resistor and a voltage stabilizing diode;

[0023] The first end of the fourth resistor is connected with the second end of the pluggable interface, and the second end of the fourth resistor accesses the second power supply voltage;

[0024] The first end of the voltage stabilizing diode is connected with the second end of the first resistor, and the second end of the voltage stabilizing diode accesses the second power supply voltage.

[0025] Optionally, the energy storage unit comprises an energy storage capacitor; the first end of the energy storage capacitor accesses the first power supply voltage, and the second end of the energy storage unit accesses the second power supply voltage.

[0026] Optionally, the voltage dividing unit comprises a fifth resistor, a sixth resistor and a first diode;

[0027] The first end of the fifth resistor accesses the first power supply voltage, the second end of the fifth resistor is connected with the first end of the sixth resistor, and the second end of the sixth resistor accesses the second power supply voltage;

[0028] The first end of the sixth resistor is connected with the first end of the first diode, and the second end of the first diode is connected with the enable end of the voltage stabilizing unit;

[0029] The voltage stabilizing unit comprises a voltage stabilizer, a seventh resistor, a second diode and a first capacitor;

[0030] The first power supply end of the voltage stabilizer accesses the first power supply voltage, and the second power supply end of the voltage stabilizer accesses the second power supply voltage;

[0031] The enable end of the voltage stabilizer is connected with the second end of the first diode, the enable end of the voltage stabilizer is connected with the first end of the seventh resistor, and the second end of the seventh resistor accesses the second power supply voltage;

[0032] The output end of the voltage stabilizer outputs the third power supply voltage, the output end of the voltage stabilizer is connected with the first end of the second diode, and the second end of the second diode is connected with the enable end of the voltage stabilizer;

[0033] The output end of the voltage stabilizer is connected with the first end of the first capacitor, and the second end of the first capacitor accesses the first power supply voltage;

[0034] The switch unit comprises a first transistor and an eighth resistor;

[0035] The control end of the first transistor is connected with the processing module, the first end of the first transistor is connected with the output end of the voltage stabilizer, and the second end of the first transistor is connected with the first end of the temperature detection module.

[0036] The eighth resistor is connected between the control end of the first transistor and the first end of the first transistor.

[0037] Optionally, the voltage conversion module further comprises a rectification unit;

[0038] The voltage conversion unit is connected with the rectification unit, and the rectification unit is connected with the power management module.

[0039] The rectification unit comprises a rectifier bridge circuit.

[0040] The first end of the rectifier bridge circuit is connected with the first group of voltage conversion groups, and the second end of the rectifier bridge circuit is connected with the second group of voltage conversion groups.

[0041] The voltage conversion module further comprises a voltage limiting diode.

[0042] The voltage limiting diode is connected between the first end of the rectifier bridge circuit and the second end of the rectifier bridge circuit.

[0043] Optionally, the resistances of different first resistors in the voltage conversion subunit are the same.

[0044] Optionally, the temperature detection device further comprises an antenna.

[0045] The processing module is connected with the antenna, and the processing module is configured to send the acquired temperature information to a terminal device through the antenna.

[0046] According to another aspect of the present application, a power distribution cabinet is provided, which comprises the temperature detection device according to any one of the embodiments of the present application.

[0047] The technical scheme of the embodiment of the utility model discloses a voltage conversion module can be set up, can convert the power supply voltage, and power supply is convenient to the temperature detection module.And voltage conversion module includes voltage conversion unit;Voltage conversion unit includes first group voltage conversion group and second group voltage conversion group, voltage conversion group multiple series connection voltage conversion subunit, voltage conversion subunit includes at least two parallel connection first resistance, then in a voltage conversion subunit, when one first resistance fails, the circuit passes through the rest first resistance conduction, so that there is a first resistance damage voltage conversion module does not immediately power off.And at least two first resistance parallel connection can improve the current-carrying capacity of voltage conversion subunit, improve the impact resistance of voltage conversion subunit, improve the reliability and stability of voltage conversion subunit, and further improve the reliability and stability of temperature detection device, so, voltage conversion unit includes multiple first resistance, and the volume of voltage conversion unit is small, and the cost is low, so that the volume of temperature detection device is small, and the cost is low.

[0048] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the utility model, nor is it intended to limit the scope of the utility model. Other features of the utility model will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0050] Figure 1 It is a circuit structure schematic view of a temperature detection device provided by the embodiment of the utility model;

[0051] Figure 2 It is another circuit structure schematic view of a temperature detection device provided by the embodiment of the utility model;

[0052] Figure 3 It is another circuit structure schematic view of a temperature detection device provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0053] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0054] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0055] The embodiment provides a temperature detection device. Figure 1 It is a circuit structure schematic diagram of a temperature detection device provided by the embodiment of the present application, referring to Figure 1 The temperature detection device comprises a voltage conversion module 100, a power management module 200, a processing module 250 and at least one temperature detection module 300.

[0056] The voltage conversion module 100 comprises a voltage conversion unit 110; the voltage conversion unit 110 comprises a first group of voltage conversion groups A1 and a second group of voltage conversion groups A2, a plurality of series-connected voltage conversion subunits 111 of the voltage conversion group, and the voltage conversion subunit 111 comprises at least two parallel-connected first resistors R1.

[0057] The voltage conversion module 100 is connected with the power management module 200, and the voltage conversion module 100 is configured to convert the power supply voltage into a first power supply voltage VIN.

[0058] The power management module 200 is connected with the processing module 250; the power management module 200 is configured to supply power for the processing module 250 based on the first power supply voltage VIN; the processing module 250 is connected with the temperature detection module 300; the processing module 250 is configured to enable at least one temperature detection module 300 and acquire temperature information collected by the temperature detection module 300.

[0059] The power supply voltage is, for example, a mains voltage, and the voltage conversion module 100 is connected to the power supply voltage. The power supply voltage can include a neutral voltage and a live voltage, and the first group of voltage conversion groups A1 is connected to the live voltage, and the second group of voltage conversion groups A2 is connected to the neutral voltage, i.e., the first group of voltage conversion groups A is connected to the live line L, and the second group of voltage conversion groups A2 is connected to the neutral line N, facilitating connection to the power supply voltage. The voltage conversion subunit 111 includes at least two first resistors R1 connected in parallel, so that in one voltage conversion subunit 111, when one first resistor R1 fails, the circuit can be turned on through the remaining first resistors R1, so that the voltage conversion module 100 will not be immediately powered off after one first resistor R1 is damaged. Moreover, the at least two first resistors R1 connected in parallel can improve the current-carrying capacity of the voltage conversion subunit 111, improve the impact resistance of the voltage conversion subunit 111, and improve the reliability and stability of the voltage conversion subunit, thereby improving the reliability and stability of the temperature detection device. In this way, the voltage conversion unit 110 includes a plurality of first resistors R1, without the need to use a larger volume of AC-DC circuit, and the voltage conversion unit 110 has a smaller volume and lower cost, so that the temperature detection device has a smaller volume and lower cost.

[0060] The voltage conversion subunit 111 can include two first resistors R1 connected in parallel, which can reduce the cost and the volume of the temperature detection device while improving the impact resistance. The voltage conversion subunit 111 can also include a plurality of first resistors R1 connected in parallel, so that the voltage conversion module 100 has higher impact resistance, which can be determined according to actual conditions, and the present embodiment is not limited in this regard.

[0061] It should be noted that the resistances of different first resistors R1 in the same voltage conversion subunit 111 can be the same or different. The resistances of the first resistors R1 in different voltage conversion subunits 111 can be the same or different, and the present embodiment is not limited in this regard.

[0062] Specifically, the commercial power is alternating current. The voltage conversion module 100 can convert the amplitude of the alternating current, for example, to a lower amplitude alternating current, and then convert the lower amplitude alternating current to direct current, i.e., to the first power voltage VIN, thereby facilitating the use of the first power voltage VIN to convert to power the temperature detection module 300. The power management module 200 can power the processing module 250 based on the first power voltage VIN. After the processing module 250 is powered, the processing module 250 determines whether to enable the temperature detection module 300. For example, the power management module 200 can include an energy storage device, and the first power voltage VIN can charge the energy storage device. When the processing module 250 determines that the voltage stored in the energy storage device meets the sampling requirements, the processing module 250 enables at least one temperature detection module 300, so that the enabled temperature detection module 300 is powered and works, and the processing module 250 can obtain the temperature information collected by the temperature detection module 300. In this way, the processing module 250 can determine the temperature value of the detected device. The detected device can be a terminal, a cable, or a current-carrying copper bar, and the present embodiment is not limited thereto.

[0063] The temperature detection device can be provided with at least one temperature detection module 300, so that one or more temperature detection modules 300 can be selectively used. Different temperature detection modules 300 can be located at different positions, and the use of multiple temperature detection modules 300 can obtain temperature information from multiple directions, which is beneficial to improve the comprehensiveness of temperature detection. It should be noted that, Figure 1 The temperature detection device includes four temperature detection modules 300, but is not limited thereto.

[0064] The technical scheme of the present embodiment, by providing a voltage conversion module, can convert the power supply voltage to facilitate power supply to the temperature detection module. And the voltage conversion module includes a voltage conversion unit; the voltage conversion unit includes a first group of voltage conversion groups and a second group of voltage conversion groups, a voltage conversion group includes a plurality of voltage conversion sub-units connected in series, and a voltage conversion sub-unit includes at least two first resistors connected in parallel. In one voltage conversion sub-unit, when one first resistor fails, the circuit is turned on through the remaining first resistors, so that the voltage conversion module will not be immediately powered off after one first resistor is damaged. And at least two first resistors connected in parallel can improve the current-carrying capacity of the voltage conversion sub-unit, improve the impact resistance of the voltage conversion sub-unit, and improve the reliability and stability of the voltage conversion sub-unit, thereby improving the reliability and stability of the temperature detection device. In this way, the voltage conversion unit includes a plurality of first resistors, so that the voltage conversion unit has a smaller size and lower cost, and the temperature detection device has a smaller size and lower cost.

[0065] On the basis of the above technical scheme, as Figure 1As shown, the first end of the first group of voltage conversion groups A1 is connected with the first power line L, and the second end of the first group of voltage conversion groups is connected with the power management module 200.

[0066] The first end of the second group of voltage conversion groups A2 is connected with the second power line N, and the second end of the second group of voltage conversion groups A2 is connected with the second power voltage.

[0067] The first power line L is a positive power line, for example, a live wire, and the second power line N can be a zero line. The second power voltage can be ground.

[0068] Specifically, the first group of voltage conversion groups A1 and the second group of voltage conversion groups A2 can convert the power supply voltage between the first power line L and the second power line N, for example, convert the amplitude of alternating current, for example, step down, and convert the input power supply voltage into alternating current with a lower amplitude. The first group of voltage conversion groups A1 can be directly connected to the power management module 200, or can be connected to the power management module 200 through a rectifier circuit, and the embodiment is not limited. The second group of voltage conversion groups A2 can be directly connected to the second power voltage, or can be connected to the second power voltage through a rectifier circuit, and the embodiment is not limited.

[0069] Figure 2 is another circuit structure schematic diagram of a temperature detection device provided by the embodiment of the utility model, and optionally, with reference to Figure 2 The temperature detection device further comprises a first interface J1, the first group of voltage conversion groups A1 is connected with the first end of the first interface J1, and the second group of voltage conversion groups A2 is connected with the second end of the first interface J1; the first end of the first interface J1 is connected with the live wire L, and the second end of the first interface L1 is connected with the zero line. In this way, the voltage conversion module 100 can be connected with the power supply voltage through the first interface J1. The first interface J1 can be a pluggable interface, so that the voltage conversion module 100 can be selectively connected with the power supply voltage.

[0070] Optionally, with reference to Figure 2 The power management module 200 comprises an energy storage unit 210, a voltage division unit 220, a voltage stabilizing unit 230 and a switching unit 240.

[0071] The first end of the energy storage unit 210 is connected with the first power voltage VIN, and the second end of the energy storage unit 210 is connected with the second power voltage;

[0072] The enable end of the voltage stabilizing unit 230 is connected with the first end of the energy storage unit 210 through the voltage division unit 220, and the output end of the voltage stabilizing unit 230 is connected with the power supply end of the temperature detection module 300 through the switching unit 240.

[0073] The power supply end of the processing module 250 is connected with the output end of the voltage stabilizing unit 230; the processing module 250 is connected with the enable end of the switch unit 240; the voltage stabilizing unit 230 is configured to output a third power supply voltage VCC to the power supply end of the processing module 250 when the output voltage V_CHECK of the voltage dividing unit 220 reaches a first threshold voltage;

[0074] The processing module 250 accesses the output voltage V_CHECK of the voltage dividing unit 220, and the processing module 250 is configured to output an enable signal to the switch unit 240 when the voltage of the energy storage unit 210 reaches a second threshold voltage; the switch unit 240 is configured to output a fourth power supply voltage V_NTC to the first end of at least one temperature detection module 300 based on the third power supply voltage VCC in response to the enable signal; and the processing module 250 is further configured to acquire temperature information collected by the temperature detection module 300.

[0075] The second power supply voltage can be a negative voltage or a ground voltage, Figure 2 The case where the second power supply voltage is a ground voltage is shown in the figure, but the application is not limited thereto. The processing module 250 can include a microprocessor or a single-chip microcomputer, etc. The processing module 250 can also include a comparison circuit and an analog-to-digital conversion circuit. The comparison circuit can determine whether the voltage of the energy storage unit 210 reaches the second threshold voltage and output an enable signal when the voltage of the energy storage unit 210 reaches the second threshold voltage. The analog-to-digital conversion circuit can acquire the temperature information collected by the temperature detection module 300.

[0076] Specifically, the first power voltage VIN can charge the energy storage unit 210, so that the voltage of the first end of the energy storage unit 210 gradually increases. The voltage of the first end of the energy storage unit 210 is converted by the voltage dividing unit 220 and output to the enable end of the voltage stabilizing unit 230, and then the voltage of the enable end of the voltage stabilizing unit 230 gradually increases. When the voltage of the enable end of the voltage stabilizing unit 230 reaches the first threshold voltage, that is, when the voltage of the enable end of the voltage stabilizing unit 230 is greater than or equal to the first threshold voltage, the voltage stabilizing unit 230 outputs the third power voltage VCC to the processing module 250. After the processing module 250 is powered on, the output voltage V CHECK of the voltage dividing unit 220 is converted into the voltage of the energy storage unit 210, that is, the voltage difference between the two ends of the energy storage unit 210, that is, the voltage stored by the energy storage unit 210. The processing module 250 compares the voltage stored by the energy storage unit 210 with the second threshold voltage. When it is determined that the voltage of the energy storage unit 210 reaches the second threshold voltage, that is, greater than or equal to the second threshold voltage, it indicates that the voltage stored by the energy storage unit 210 is sufficient to maintain the voltage stabilizing unit 230 to supply power to the temperature detection module 300, that is, sufficient to ensure that all temperature detection modules 300 can normally sample. The processing module 250 will output an enable signal to the switching unit 240, and the switching unit 240 will be turned on. Based on the third power voltage VCC, the fourth power voltage V_NTC is output to the first end of at least one temperature detection module 300 to supply power to the temperature detection module 300, so that the temperature detection module 300 collects temperature. In this way, the voltage stabilizing unit 230 can output stable third power voltage VCC to ensure that the temperature detection module 300 can operate stably. Moreover, the processing module 250 can obtain the temperature information collected by the temperature detection module 300, which is convenient for storage or output, thereby realizing temperature monitoring. The third power voltage VCC can be equal to the fourth power voltage V_NTC.

[0077] Optionally, with reference to Figure 2 , the temperature detection module 300 comprises a temperature sensor 310, a pluggable interface 320, a second resistor R2 and a third resistor R3;

[0078] The first end of the temperature sensor 310 is pluggably connected to the first end of the pluggable interface 320, and the second end of the temperature sensor 310 is pluggably connected to the second end of the pluggable interface 320;

[0079] The first end of the second resistor R2 is connected to the switching unit 240, and the second end of the second resistor R2 is connected to the first end of the pluggable interface 320 through the third resistor R3;

[0080] The second end of the pluggable interface 320 is connected to the second power voltage;

[0081] The second end NTC1 of the second resistor R2 is connected to the processing module 250.

[0082] The temperature sensor 310 can be a thermistor, which can be a positive temperature coefficient thermistor or a negative temperature coefficient thermistor, and the embodiment is not limited in this regard.

[0083] Specifically, by setting the pluggable interface 320, the temperature sensor 310 can be plugged or unplugged according to requirements, so as to determine whether the temperature sensor 310 is connected to the temperature detection circuit according to requirements, and further determine the number of connected temperature detection modules 300 according to requirements. By setting the second resistor R2 and the third resistor R3, current limiting can be performed to avoid damage to the temperature sensor 310. After the switch unit 240 outputs the fourth power voltage V_NTC, the temperature sensor 310 is powered, and the resistance of the temperature sensor 310 changes with the change of temperature, so that the voltage at the first end of the temperature sensor 310 changes. Therefore, the processing module 250 can determine the voltage at the first end of the temperature sensor 310 by acquiring the voltage at the second end NTC1 of the second resistor R2, that is, the voltage across the temperature sensor 310, and further determine the temperature value according to the temperature-voltage relationship corresponding to the temperature sensor 310. In this way, the temperature is monitored.

[0084] Optionally, with reference to Figure 2 , the temperature detection module 300 further includes a fourth resistor R4 and a voltage stabilizing diode D1;

[0085] The first end of the fourth resistor R4 is connected to the second end of the pluggable interface 320, and the second end of the fourth resistor R4 is connected to the second power voltage.

[0086] The first end of the voltage stabilizing diode D1 is connected to the second end of the first resistor R1, and the second end of the voltage stabilizing diode D1 is connected to the second power voltage.

[0087] Specifically, by setting the fourth resistor R4, current limiting can be performed. By setting the voltage stabilizing diode D1, the first end of the temperature sensor 310 and the second end of the temperature sensor 310 can be stabilized, which facilitates the temperature sensor 310 to output stable voltage, so that the processing module 250 can acquire accurate temperature information.

[0088] Optionally, with reference to Figure 2 The energy storage unit 210 includes an energy storage capacitor C1, and the first end of the energy storage capacitor C1 is connected to the first power voltage VIN, and the second end of the energy storage unit 210 is connected to the second power voltage.

[0089] Specifically, after the voltage conversion module 100 outputs the first power voltage VIN, the energy storage capacitor C1 can be charged, so that the voltage of the first end of the energy storage capacitor C1 gradually increases, thereby the output voltage V CHECK of the voltage dividing unit 220 gradually increases, and when the first threshold voltage is reached, the voltage stabilizing unit 230 starts to work and outputs the third power voltage VCC, so that the processing module 250 is powered to work.

[0090] Optionally, with reference to Figure 2 , the voltage dividing unit 220 comprises a fifth resistor R5, a sixth resistor R6 and a first diode D2;

[0091] The first end of the fifth resistor R5 is connected to the first power voltage VIN, the second end of the fifth resistor R5 is connected to the first end of the sixth resistor R6, and the second end of the sixth resistor R6 is connected to the second power voltage;

[0092] The first end of the sixth resistor R6 is connected to the first end of the first diode D2, and the second end of the first diode D2 is connected to the enable end of the voltage stabilizing unit 230;

[0093] The voltage stabilizing unit 230 comprises a voltage stabilizer U1, a seventh resistor R7, a second diode D3 and a first capacitor C2;

[0094] The first power supply end of the voltage stabilizer U1 is connected to the first power voltage VIN, and the second power supply end of the voltage stabilizer U1 is connected to the second power voltage;

[0095] The enable end of the voltage stabilizer U1 is connected to the second end of the first diode D2, the enable end of the voltage stabilizer U1 is connected to the first end of the seventh resistor R7, and the second end of the seventh resistor R7 is connected to the second power voltage;

[0096] The output end of the voltage stabilizer U1 outputs the third power voltage VCC, the output end of the voltage stabilizer U1 is connected to the first end of the second diode D3, and the second end of the second diode D3 is connected to the enable end of the voltage stabilizer U1;

[0097] The output end of the voltage stabilizer U1 is connected to the first end of the first capacitor C2, and the second end of the first capacitor C2 is connected to the first power voltage VIN;

[0098] The switching unit 240 comprises a first transistor Q1 and an eighth resistor R8;

[0099] The control end of the first transistor Q1 is connected to the processing module 250, the first end of the first transistor Q1 is connected to the output end of the voltage stabilizer U1, and the second end of the first transistor Q1 is connected to the first end of the temperature detection module 300;

[0100] The eighth resistor R8 is connected between the control end of the first transistor Q1 and the first end of the first transistor Q1.

[0101] Specifically, by setting the fifth resistor R5 and the sixth resistor R6, the voltage at the first end of the energy storage capacitor C1 can be divided, avoiding a large voltage input to the enable end of the voltage stabilizer U1, which can cause damage to the voltage stabilizer U1. By setting the first diode D2, unidirectional conduction is achieved, avoiding the reverse voltage at the enable end of the voltage stabilizer U1 from affecting the voltage of the energy storage capacitor C1. By setting the seventh resistor R7, current limiting can be achieved. By setting the first capacitor C2, filtering can be achieved, making the output third power voltage VCC more stable. After the voltage at the enable end of the voltage stabilizer U1 reaches the first threshold voltage, the voltage stabilizer U1 can convert the first power voltage VIN and output the third power voltage VCC. By setting the second diode D3, after the voltage stabilizer U1 outputs the third power voltage VCC, the third power voltage VCC continues to provide voltage for the enable end of the voltage stabilizer U1 through the second diode D3, so that the voltage stabilizer U1 remains in a working state, the voltage stabilizer U1 is self-locked, and the voltage stabilizer U1 is ensured to stably output the third power voltage VCC.

[0102] Optionally, referring to Figure 2 The voltage conversion module 100 further includes a rectification unit 120.

[0103] The voltage conversion unit 110 is connected to the supply voltage, the voltage conversion unit 110 is connected to the rectification unit 120, and the rectification unit 120 is connected to the power management module 200.

[0104] Specifically, the voltage conversion unit 110 can convert the amplitude of alternating current, for example, to a lower amplitude alternating current, and the rectification unit 120 includes a rectification circuit, which can convert the lower amplitude alternating current to direct current, i.e., to the first power voltage VIN, to facilitate power supply for the temperature detection module 300.

[0105] Optionally, referring to Figure 2 The rectification unit 120 includes a rectification bridge circuit.

[0106] The first end of the rectification bridge circuit is connected to the first group of voltage conversion groups A1, and the second end of the rectification bridge circuit is connected to the second group of voltage conversion groups A2.

[0107] The voltage conversion module 100 further includes a voltage limiting diode D4.

[0108] The voltage limiting diode D4 is connected between the first end of the rectification bridge circuit and the second end of the rectification bridge circuit.

[0109] Specifically, the rectification bridge circuit can be a half-bridge circuit or a full-bridge circuit, Figure 2The rectifier bridge circuit is a full-bridge circuit, but is not limited thereto. The rectifier bridge circuit can rectify the voltage output by the voltage conversion unit 110, thereby outputting a direct current voltage, i.e., the first power supply voltage VIN, to facilitate power supply to the temperature detection module 300. The voltage limiting diode D4 can be a bidirectional transient voltage suppressor (TVS) and can perform voltage limiting protection. When the voltage across the voltage limiting diode D4 exceeds the protection value, the voltage limiting diode D4 rapidly conducts to limit the voltage to below the protection value, thereby preventing the subsequent circuit from being burned due to overvoltage and improving the stability and reliability of the voltage conversion module 100.

[0110] Optionally, referring to Figure 2 , the temperature detection device further comprises a second interface J2 and a third interface J3;

[0111] The first end of the second interface J2 is connected with the rectifier bridge circuit, and the second end of the second interface J2 is connected with the second power supply voltage;

[0112] The first end of the third interface J3 is connected with the first end of the energy storage unit 210, and the second end of the third interface J3 is connected with the second end of the energy storage unit 210.

[0113] For example, when the voltage conversion module 100 and the power management module 200 are located on different printed circuit boards, the second interface J2 and the third interface J3 are two interfaces, and when the second interface J2 is connected with the third interface J3, the first end of the energy storage unit 210 can be connected with the first power supply voltage VIN. Alternatively, the voltage conversion module 100 and the power management module 200 are located on the same printed circuit board, and the second interface J2 and the third interface J3 can be the same interface, so that the first end of the energy storage unit 210 can be connected with the first power supply voltage VIN output by the rectifier bridge circuit.

[0114] Optionally, referring to Figure 2 , the resistances of the different first resistors R1 in the voltage conversion sub-unit 111 are the same. The resistances of the first resistors R1 in the different voltage conversion sub-units 111 can be the same or different. The first resistor R1 can be in 0805 packaging or 1206 packaging, which can improve the voltage resistance of the first resistor R1 and is beneficial to further improving the reliability of the voltage conversion module 100.

[0115] On the basis of the above technical solutions, Figure 3 is another circuit structure schematic diagram of a temperature detection device provided by the embodiment of the present application. Optionally, referring to Figure 3 , the temperature detection device further comprises an antenna 400;

[0116] The processing module 250 is connected with the antenna 400, and the processing module 250 is configured to send the acquired temperature information to the terminal device through the antenna 400.

[0117] Specifically, the processing module 250 can include a Bluetooth circuit to facilitate communication. The processing module 250 can send the acquired temperature information to the terminal device through the antenna 400, so as to acquire the temperature information of the detected device in time, and react in time when the temperature of the detected device is abnormal.

[0118] The utility model also provides a kind of switch board, and the switch board includes the temperature detection device provided by any of the above implementation solutions, so that the temperature detection device can detect the temperature of the wiring terminal, cable or current-carrying copper bar surface in the switch board. Since the switch board of the present embodiment includes the temperature detection device provided by any of the above implementation solutions, it has the same beneficial effects as the temperature detection device provided by any of the above implementation solutions, and will not be repeated here.

[0119] The above specific embodiments do not constitute a limitation on the scope of protection of the utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included within the scope of protection of the utility model.

Claims

1. A temperature detection device, characterized in that: include: A voltage conversion module, a power management module, a processing module and at least one temperature detection module; The voltage conversion module includes a voltage conversion unit; the voltage conversion unit includes a first voltage conversion group and a second voltage conversion group, the voltage conversion group includes a plurality of voltage conversion sub-units connected in series, and the voltage conversion sub-unit includes at least two first resistors connected in parallel; The voltage conversion module is connected to the power management module, and the voltage conversion module is configured to convert the supply voltage into a first power supply voltage; The power management module is connected to the processing module; the power management module is configured to power the processing module based on the first power supply voltage; the processing module is connected to the temperature detection module; the processing module is configured to enable at least one of the temperature detection modules and obtain the temperature information collected by the temperature detection module.

2. The temperature detection device according to claim 1, characterized in that A first end of the first voltage conversion group is connected to a first power line, and a second end of the first voltage conversion group is connected to the power management module; A first end of the second voltage conversion group is connected to a second power line, and a second end of the second voltage conversion group is connected to a second power voltage.

3. The temperature detection device according to claim 1, characterized in that The power management module includes an energy storage unit, a voltage dividing unit, a voltage stabilizing unit and a switch unit; The first end of the energy storage unit is connected to the first power supply voltage, and the second end of the energy storage unit is connected to the second power supply voltage; The enable end of the voltage stabilizing unit is connected to the first end of the energy storage unit through the voltage dividing unit, and the output end of the voltage stabilizing unit is connected to the power supply end of the temperature detection module through the switch unit; The power supply terminal of the processing module is connected to the output terminal of the voltage stabilizing unit; the processing module is connected to the enable terminal of the switch unit; the voltage stabilizing unit is configured to output a third power supply voltage to the power supply terminal of the processing module when the output voltage of the voltage dividing unit reaches a first threshold voltage; The processing module is connected to the output voltage of the voltage divider unit, and the processing module is configured to output an enable signal to the switching unit when it determines that the voltage of the energy storage unit reaches a second threshold voltage; the switching unit is configured to output a fourth power supply voltage to the first end of at least one of the temperature detection modules based on the third power supply voltage in response to the enable signal; the processing module is further configured to obtain temperature information collected by the temperature detection module.

4. The temperature detection device according to claim 3, characterized in that: The temperature detection module includes a temperature sensor, a pluggable interface, a second resistor and a third resistor; The first end of the temperature sensor is pluggably connected to the first end of the pluggable interface, and the second end of the temperature sensor is pluggably connected to the second end of the pluggable interface; A first end of the second resistor is connected to the switch unit, and a second end of the second resistor is connected to the first end of the pluggable interface through the third resistor; The second end of the pluggable interface is connected to the second power supply voltage; The second end of the second resistor is connected to the processing module.

5. The temperature detection device according to claim 4, characterized in that: The temperature detection module further includes a fourth resistor and a voltage stabilizing diode; The first end of the fourth resistor is connected to the second end of the pluggable interface, and the second end of the fourth resistor is connected to the second power supply voltage; The first end of the voltage stabilizing diode is connected to the second end of the first resistor, and the second end of the voltage stabilizing diode is connected to the second power supply voltage.

6. The temperature detection device according to claim 3, characterized in that: The energy storage unit includes an energy storage capacitor; a first end of the energy storage capacitor is connected to the first power supply voltage, and a second end of the energy storage unit is connected to the second power supply voltage.

7. The temperature detection device according to claim 3, characterized in that: The voltage dividing unit includes a fifth resistor, a sixth resistor and a first diode; A first end of the fifth resistor is connected to the first power supply voltage, a second end of the fifth resistor is connected to the first end of the sixth resistor, and a second end of the sixth resistor is connected to the second power supply voltage; The first end of the sixth resistor is connected to the first end of the first diode, and the second end of the first diode is connected to the enable end of the voltage stabilizing unit; The voltage stabilizing unit includes a voltage stabilizer, a seventh resistor, a second diode and a first capacitor; The first power supply terminal of the voltage stabilizer is connected to the first power supply voltage, and the second power supply terminal of the voltage stabilizer is connected to the second power supply voltage; The enable terminal of the voltage regulator is connected to the second terminal of the first diode, the enable terminal of the voltage regulator is connected to the first terminal of the seventh resistor, and the second terminal of the seventh resistor is connected to the second power supply voltage; The output end of the voltage regulator outputs the third power supply voltage, the output end of the voltage regulator is connected to the first end of the second diode, and the second end of the second diode is connected to the enable end of the voltage regulator; The output end of the voltage regulator is connected to the first end of the first capacitor, and the second end of the first capacitor is connected to the first power supply voltage; The switch unit includes a first transistor and an eighth resistor; The control end of the first transistor is connected to the processing module, the first end of the first transistor is connected to the output end of the voltage regulator, and the second end of the first transistor is connected to the first end of the temperature detection module; The eighth resistor is connected between the control terminal of the first transistor and the first terminal of the first transistor.

8. The temperature detection device according to claim 1, wherein: The voltage conversion module also includes a rectifier unit; The voltage conversion unit is connected to the power supply voltage, the voltage conversion unit is connected to the rectifier unit, and the rectifier unit is connected to the power management module; The rectifier unit includes a rectifier bridge circuit; The first end of the rectifier bridge circuit is connected to the first voltage conversion group, and the second end of the rectifier bridge circuit is connected to the second voltage conversion group; The voltage conversion module also includes a voltage limiting diode; The voltage limiting diode is connected between the first end of the rectifier bridge circuit and the second end of the rectifier bridge circuit.

9. The temperature detection device according to claim 1, characterized in that: The resistance values ​​of different first resistors in the voltage conversion subunit are the same.

10. The temperature detection device according to claim 3, characterized in that: The temperature detection device further includes an antenna; The processing module is connected to the antenna, and the processing module is configured to send the acquired temperature information to a terminal device via the antenna.

11. A power distribution cabinet, characterized in that: The invention comprises the temperature detection device according to any one of claims 1 to 10.

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