A temperature control circuit, a temperature regulating device, a temperature control system and a temperature regulating limiter

Abstract

The present invention provides a temperature control circuit, including: a temperature acquisition circuit, a logic operation circuit and a driving circuit. The present invention firstly acquires the temperature of a limiter and the ambient temperature through the temperature acquisition circuit, and generates a limiter temperature signal and an ambient temperature signal accordingly; then the limiter temperature signal and the ambient temperature signal are logically operated and compared through the logic operation circuit, and as long as the comparison result is that the temperature of the limiter is greater than the target temperature, the logic operation circuit will output a control signal, and then the driving circuit drives the temperature adjustment device to work, so as to cool the limiter; even if the limiter is seriously heated and causes its temperature to rise again, the above process can be used to cool the limiter again, and then the temperature of the limiter can be limited to fluctuate near the target temperature, ensuring that the limiter can be effectively cooled when it is seriously heated.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature control, and in particular to a temperature control circuit, a temperature control device, a temperature control system and a temperature control limiter. Background Art

[0002] The limiter is a commonly used RF device. Usually, in order to ensure the normal operation of the circuit, a limiter is added in front of power-sensitive devices such as mixers, low-noise amplifiers, and detectors to limit the input power of the circuit to not exceed the power that the power-sensitive devices can withstand.

[0003] Currently, limiters are widely used in wind profiler radars. However, in cases of rainfall or degradation of circulator performance, the power of the signal entering the limiter increases. Since the limiter generates heat in the process of limiting the input signal power, when the power of the signal entering the limiter is too large, the limiter performance degrades or burns out.

[0004] Traditional limiters use air convection, heat conduction through a cold plate, or a combination of the two to reduce their own temperature. However, when the limiter is seriously heated, the cooling effect of the above three solutions cannot be guaranteed. Summary of the invention

[0005] In view of this, embodiments of the present invention provide a temperature control circuit, a temperature adjustment device, a temperature control system and a temperature adjustment limiter.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] A first aspect of the present invention provides a temperature control circuit, which is applied to a wind profiler radar, wherein a temperature control device is provided on a limiter in the wind profiler radar; the temperature control circuit comprises: a temperature acquisition circuit, a logic operation circuit and a drive circuit; wherein:

[0008] The temperature acquisition circuit is used to acquire and generate an ambient temperature signal according to the ambient temperature of the wind profiler radar, and at the same time, acquire and generate a limiter temperature signal according to the limiter temperature;

[0009] The logic operation circuit is used to perform logic operation and comparison on the limiter temperature signal and the ambient temperature signal, and when the comparison result shows that the limiter temperature is greater than the target temperature, output a control signal to the drive circuit;

[0010] The driving circuit is used to drive the temperature regulating device to operate and cool the limiter when receiving the control signal.

[0011] Optionally, the target temperature is equal to the difference between the ambient temperature and a preset temperature difference; and the preset temperature difference is greater than or equal to zero.

[0012] Optionally, the logic operation circuit includes: a first voltage divider circuit, a first voltage follower circuit, a first subtraction operation circuit, a second voltage follower circuit and a first comparison circuit; wherein:

[0013] The first voltage divider circuit is used to receive and generate a preset divided voltage according to the power supply voltage;

[0014] The first voltage follower circuit is used to generate a preset difference according to the preset voltage division; the preset difference is a voltage signal corresponding to the preset temperature difference;

[0015] The first subtraction circuit is used for subtracting the received preset difference from the received ambient temperature signal to generate and output a target temperature signal to the first comparison circuit;

[0016] The second voltage follower circuit is used to amplify the received limiter temperature signal by the same multiple, generate and output the limiter follower temperature signal to the first comparison circuit;

[0017] The first comparison circuit is used for outputting the control signal to the driving circuit when the limiter following temperature signal is greater than the target temperature signal.

[0018] Optionally, the logic operation circuit includes: a second voltage divider circuit, a third voltage follower circuit, a first addition operation circuit, a fourth voltage follower circuit and a second comparison circuit; wherein:

[0019] The second voltage divider circuit is used to receive and generate a preset divided voltage according to the power supply voltage;

[0020] The third voltage follower circuit is used to generate and output a preset difference value to the first adding circuit according to the preset voltage; the preset difference value is a voltage signal corresponding to the preset temperature difference;

[0021] The first adding circuit is used for adding the preset difference value to the received limiter temperature signal, generating and outputting the limiter conversion temperature signal to the fourth voltage follower circuit;

[0022] The fourth voltage follower circuit is used to amplify the limiter conversion temperature signal by the same multiple, generate and output the limiter follower temperature signal to the second comparison circuit;

[0023] The second comparison circuit is used for outputting the control signal to the driving circuit when the limiter following temperature signal is greater than the received ambient temperature signal.

[0024] Optionally, the logic operation circuit includes: a third voltage divider circuit, a fifth voltage follower circuit, a second subtraction operation circuit, a third subtraction operation circuit and a first hysteresis comparison circuit; wherein:

[0025] The third voltage-dividing circuit is used to receive and generate a preset divided voltage according to the power supply voltage;

[0026] The fifth voltage follower circuit is used to generate and output a preset difference to the second subtraction circuit according to the preset voltage; the preset difference is a voltage signal corresponding to the preset temperature difference;

[0027] The second subtraction circuit is used for subtracting the preset difference from the received ambient temperature signal to generate and output a target temperature signal to the third subtraction circuit;

[0028] The third subtraction circuit is used for subtracting the received limiter temperature signal from the target temperature signal to generate and output a first comparison signal to the first hysteresis comparison circuit;

[0029] The first hysteresis comparison circuit is used for outputting the control signal to the driving circuit when the first comparison signal is less than zero.

[0030] Optionally, the logic operation circuit includes: a fourth voltage divider circuit, a sixth voltage follower circuit, a second addition operation circuit, a fourth subtraction operation circuit and a second hysteresis comparison circuit; wherein:

[0031] The fourth voltage-dividing circuit is used to receive and generate a preset divided voltage according to the power supply voltage;

[0032] The sixth voltage follower circuit is used to generate and output a preset difference value to the second adding circuit according to the preset voltage; the preset difference value is a voltage signal corresponding to the preset temperature difference;

[0033] The second adding circuit is used for adding the preset difference value to the received limiter temperature signal, generating and outputting the limiter conversion temperature signal to the fourth subtracting circuit;

[0034] The fourth subtraction circuit is used for subtracting the limiter conversion temperature signal from the received ambient temperature signal to generate and output a second comparison signal;

[0035] The second hysteresis comparison circuit is used for outputting the control signal to the driving circuit when the second comparison signal is less than zero.

[0036] Optionally, the temperature acquisition circuit includes: a first temperature sensor, a second temperature sensor, a first transfer circuit and a second transfer circuit; wherein:

[0037] The first temperature sensor is used to collect and generate the ambient temperature signal according to the ambient temperature, and output the ambient temperature signal to the logic operation circuit through the first transfer circuit;

[0038] The second temperature sensor is used to collect and generate the limiter temperature signal according to the limiter temperature, and output the limiter signal to the logic operation circuit through the second transfer circuit.

[0039] Optionally, the driving circuit includes: a control circuit and a power supply circuit; wherein:

[0040] The control circuit is used to turn on its own circuit and output a power supply signal to the power supply circuit when receiving the control signal;

[0041] The power supply circuit is used to provide a power supply voltage to the temperature regulating device when receiving the power supply signal, so that the temperature regulating device works and the temperature of the limiter is reduced.

[0042] Optionally, it also includes: a DC transformer circuit; wherein:

[0043] The DC transformer circuit is used to convert the received input voltage into the operating voltage required by the temperature acquisition circuit, the logic operation circuit and the drive circuit, and output the voltage.

[0044] A second aspect of the present invention provides a temperature control device for dissipating heat for a limiter in a wind profiler radar, the temperature control device comprising: a semiconductor refrigeration sheet; wherein:

[0045] The cold end of the semiconductor refrigeration plate is arranged on one side of the limiter;

[0046] The semiconductor cooling chip is used to receive a power supply voltage when the temperature of the limiter is greater than a target temperature; and when receiving the power supply voltage, it starts to work to cool the limiter.

[0047] Optionally, it further includes: a heat dissipation device; the heat dissipation device includes: a heat insulation board, a fan and a radiator; wherein:

[0048] The hot end of the semiconductor cooling plate is arranged on a side of the radiator that is perpendicular to the radiating fins in the radiator and does not block the air inlet and outlet of the radiator;

[0049] The fan is arranged on a side of the radiator opposite to the semiconductor cooling plate;

[0050] The heat insulation plate is arranged on the same side of the heat sink as the hot end of the semiconductor cooling plate, and is used to fill the gap on the limiter that is not covered by the semiconductor cooling plate.

[0051] Optionally, the radiator comprises: a radiator body, N radiating fins and an air duct cover; wherein:

[0052] N heat sinks are vertically arranged on the heat sink body at even intervals and are parallel to the baffle of the heat sink body; N is an integer greater than 1;

[0053] The air duct cover is arranged on the heat sink and is parallel to the bottom plate of the heat sink body.

[0054] Optionally, the hot end of the semiconductor cooling plate is arranged on the outside of the air duct cover plate, or the hot end of the semiconductor cooling plate is arranged on the outside of the bottom plate of the radiator body.

[0055] A third aspect of the present invention provides a temperature control system, which is applied to a limiter in a wind profiler radar, comprising: a temperature control circuit as described in any one of the second aspects of the present invention and a temperature adjustment device as described in any one of the second aspects of the present invention; wherein:

[0056] The temperature regulating device is arranged on one side of the limiter;

[0057] The output end of the temperature control circuit is connected to the power supply end of the temperature regulating device.

[0058] Optionally, when the temperature control device includes a heat dissipation device, the temperature control circuit is arranged on one side of the temperature control device, adjacent to the limiter and the fan in the heat dissipation device, and does not block the air inlet and outlet of the radiator in the heat dissipation device.

[0059] A fourth aspect of the present invention provides a temperature regulating limiter, comprising: a limiter, and a temperature control system as described in any one of the third aspects of the present invention; wherein:

[0060] The temperature control system is arranged on one side of the limiter.

[0061] Optionally, the limiter comprises: a first-stage diode branch, a second-stage diode branch, a third-stage diode branch, an input branch and an output branch; wherein:

[0062] The first end of the first-stage diode branch, the first end of the second-stage diode branch, the first end of the third-stage diode branch, the output end of the input branch, and the input end of the output branch are all connected;

[0063] The input end of the input branch serves as the input end of the limiter; the output end of the output branch serves as the output end of the limiter;

[0064] The second end of the first-stage diode branch, the second end of the second-stage diode branch, and the second end of the third-stage diode branch are all connected, and the connection point is grounded;

[0065] The third end of the first-stage diode branch, the third end of the second-stage diode branch and the third end of the third-stage diode branch are all connected, and the connection point is grounded.

[0066] Optionally, the limiter comprises: a first capacitor, a second capacitor, a first diode and a first inductor; wherein:

[0067] One end of the first capacitor is used as the input end of the limiter; one end of the second capacitor is used as the output end of the limiter;

[0068] The other end of the first capacitor and the anode of the first diode are connected, and one end of the first inductor and the other end of the second capacitor are all connected;

[0069] The other end of the first diode is connected to the other end of the first inductor, and the connection point is grounded.

[0070] Optionally, it also includes: a switching power supply, a TR switch, a low-noise power supply and a low-noise amplifier; wherein:

[0071] When the temperature control device in the temperature control system includes a heat dissipation device, the switching power supply is arranged on the same side of the heat sink in the heat dissipation device as the fan in the heat dissipation device; the TR switch, the low-noise power supply and the low-noise amplifier are all arranged on the same side of the heat sink as the limiter.

[0072] Compared with the prior art, the present invention first collects the limiter temperature and the ambient temperature through a temperature collection circuit, and generates a limiter temperature signal and an ambient temperature signal accordingly; then performs logic operations and comparisons on the limiter temperature signal and the ambient temperature signal through a logic operation circuit, and as long as the comparison result is that the temperature of the limiter is greater than the target temperature, the logic operation circuit will output a control signal, and then drive the temperature control device to work through the drive circuit to cool the limiter; even if the limiter heats up seriously and causes its temperature to rise again, the limiter can be cooled again through the above process, and then the temperature of the limiter can be limited to fluctuate near the target temperature, ensuring that the limiter can be effectively cooled when it heats up seriously. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0074] Figure 1 A schematic diagram of a temperature control circuit provided by an embodiment of the present invention

[0075] Figure 2a A schematic diagram of an implementation of a logic operation circuit provided in another embodiment of the present invention;

[0076] Figure 2b for Figure 2a A schematic diagram of a specific implementation method of the logic operation circuit;

[0077] Figure 3a A schematic diagram of an implementation of a logic operation circuit provided in another embodiment of the present invention;

[0078] Figure 3b for Figure 3a A schematic diagram of a specific implementation method of the logic operation circuit;

[0079] Figure 4a A schematic diagram of an implementation of a logic operation circuit provided in another embodiment of the present invention;

[0080] Figure 4b for Figure 4a A schematic diagram of a specific implementation method of the logic operation circuit;

[0081] Figure 5a A schematic diagram of an implementation of a logic operation circuit provided in another embodiment of the present invention;

[0082] Figure 5b for Figure 5a A schematic diagram of a specific implementation method of the logic operation circuit;

[0083] Figure 6a A schematic diagram of an implementation of a temperature acquisition circuit provided in another embodiment of the present invention;

[0084] Figure 6b A schematic diagram of another implementation of the temperature acquisition circuit provided in this embodiment;

[0085] Figure 6c for Figure 6b A schematic diagram of a specific implementation method of the temperature acquisition circuit;

[0086] Figure 7A schematic diagram of an implementation of a driving circuit provided in another embodiment of the present invention;

[0087] Figure 8a A schematic diagram of a temperature control circuit provided by another embodiment of the present invention;

[0088] Figure 8b A schematic diagram of an implementation of a DC transformer circuit provided in another embodiment of the present invention;

[0089] Fig. 9 A schematic diagram of a temperature control device provided in another embodiment of the present invention;

[0090] Fig.10 A schematic diagram of a temperature control device provided by another embodiment of the present invention;

[0091] Fig.11 A schematic diagram of an implementation of a heat sink provided in another embodiment of the present invention;

[0092] Fig.12 A schematic diagram of a temperature control system provided by another embodiment of the present invention;

[0093] Fig.13 A schematic diagram of a temperature regulating limiter provided in another embodiment of the present invention

[0094] Fig.14 A schematic diagram of an implementation of a limiter provided by another embodiment of the present invention;

[0095] Fig.15 A schematic diagram of an implementation of a limiter provided by another embodiment of the present invention;

[0096] Fig.16a for Fig.16b A schematic diagram of a temperature regulating limiter at different viewing angles provided by another embodiment of the present invention;

[0097] Fig.17a and Fig.17b A schematic diagram of a temperature regulating limiter at different viewing angles provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0098] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0099] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0100] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0101] In order to ensure that the limiter can be effectively cooled when it is seriously heated, an embodiment of the present invention provides a temperature control circuit, which is applied to a wind profiler radar, wherein a temperature adjustment device is provided on the limiter in the wind profiler radar; the specific structure of the temperature control circuit provided in this embodiment is as follows Figure 1 , including: a temperature acquisition circuit 110, a logic operation circuit 120 and a driving circuit 130.

[0102] Specifically, the temperature acquisition circuit 110 acquires the ambient temperature of the wind profile radar through its first acquisition terminal; and, according to the corresponding relationship between the temperature value and the voltage value, the ambient temperature is converted into a corresponding voltage value, that is, an electrical signal, which is recorded as the ambient temperature signal V AMB ; Then, the ambient temperature signal V AMB Output.

[0103] It should be noted that the first acquisition end of the temperature acquisition circuit 110 is usually set in the cabinet of the wind profiler radar to collect the ambient temperature in the wind profiler radar room where the cabinet of the wind profiler radar is located. Generally, this ambient temperature is 20°C-28°C; however, the first acquisition end of the temperature acquisition circuit 110 can also be set in other places of the wind profiler radar according to actual conditions. This is not specifically limited here, but is within the protection scope of this application.

[0104] At the same time, the temperature acquisition circuit 110 acquires the limiter temperature in the wind profile radar through its second acquisition terminal; and, according to the corresponding relationship between the temperature value and the voltage value, the limiter temperature is converted into a corresponding voltage value, that is, an electrical signal, which is recorded as the limiter temperature signal V LIMITTER ; Then, the limiter temperature signal V LIMITTER Output.

[0105] It should be noted that the second acquisition terminal of the temperature acquisition circuit 110 is usually arranged on the limiter of the wind profile radar.

[0106] Specifically, the logic operation circuit 120 receives the ambient temperature signal V through its first input terminal. AMB , and receives the limiter temperature signal V through its second input terminal LIMITTER ; After that, the ambient temperature signal V AMB and the limiter temperature signal V LIMITTER Perform logical operations and comparisons to generate comparison results; when the comparison result shows that the limiter temperature is greater than the target temperature, output the control signal RELAY_CTR to the drive circuit 130 through its output terminal; when the comparison result shows that the limiter temperature is not greater than the target temperature, do not output the control signal RELAY_CTR.

[0107] Among them, the target temperature can be a temperature value set in advance according to actual conditions, or it can be the difference between the ambient temperature and the preset temperature difference; wherein, the preset temperature difference is greater than or equal to zero, and no specific restrictions are made here, all of which are within the protection scope of this application.

[0108] It should be noted that when the comparison result is that the limiter temperature is greater than the target temperature, the control signal RELAY_CTR is output, and when the comparison result is that the limiter temperature is less than or equal to the target temperature, the control signal RELAY_CTR is not output. This is only used to distinguish that the logic operation circuit 120 will produce two different results in two different situations; or it can also be understood as: when the comparison result is that the limiter temperature is greater than the target temperature, the logic operation circuit 120 outputs a first level or high level control signal RELAY_CTR, and when the comparison result is that the limiter temperature is less than or equal to the target temperature, the logic operation circuit outputs another control signal of a second level or a low level; no specific restrictions are made here, but they are all within the protection scope of this application.

[0109] Specifically, when the driving circuit 130 receives the control signal RELAY_CTR through its control end, the self-circuit is turned on, and the power supply voltage is output to the positive power supply end and the negative power supply end of the temperature control device through its first output end and the second output end, thereby driving the temperature control device to work and cool the limiter; when the control end of the driving circuit 130 does not receive the control signal RELAY_CTR, the self-circuit is not turned on, and the power supply voltage will not be provided to the temperature control device, thereby failing to drive the temperature control device to work and failing to cool the limiter.

[0110] In this embodiment, the present invention first collects the limiter temperature and the ambient temperature through the temperature collection circuit 110, and generates a limiter temperature signal V accordingly. LIMITTER and ambient temperature signal V AMB Then the limiter temperature signal V is processed by the logic operation circuit 120 LIMITTER and ambient temperature signal V AMBLogical operations and comparisons are performed, and as long as the comparison result is that the temperature of the limiter is greater than the target temperature, the logical operation circuit will output a control signal RELAY_CTR, and then drive the temperature control device to work through the driving circuit 130 to cool the limiter; even if the limiter heats up severely and causes its temperature to rise again, the limiter can be cooled again through the above process, and the temperature of the limiter can be limited to fluctuate near the target temperature, ensuring that the limiter can be effectively cooled when it heats up severely.

[0111] Normally, if a target temperature is set in advance according to actual conditions, when the ambient temperature exceeds the target temperature by a large amount, the temperature control circuit will still control the drive circuit to drive the temperature regulating device to cool the limiter when the limiter temperature is greater than the set target temperature, until the limiter temperature is no greater than the target temperature, the temperature control circuit stops working. Taking into account the error, the limiter temperature is close to the target temperature, and thus the limiter temperature is lower than the ambient temperature, and the difference is large. If the humidity in the environment is high at that time, water droplets are easily condensed on the limiter, which can easily induce a working failure of the limiter, thereby affecting the normal operation of the wind profiler radar.

[0112] Therefore, in another embodiment of the present invention, the target temperature is set to change with the change of the ambient temperature, and the degree of change is the same, that is, a preset temperature difference is maintained between the target temperature and the ambient temperature, thereby avoiding the phenomenon of water droplets condensing on the limiter when the ambient humidity is high due to a large difference between the target temperature and the ambient temperature.

[0113] There are many implementations of the logic operation circuit, and the target temperature can be determined according to the ambient temperature. The specific structure is as follows: Figure 2a , Figure 3a , Figure 4a and Figure 5a As shown; among them, Figure 2a As shown, the logic operation circuit includes: a first voltage divider circuit 211 , a first voltage follower circuit 212 , a first subtraction operation circuit 213 , a second voltage follower circuit 214 and a first comparison circuit 215 .

[0114] Specifically, the first voltage divider circuit 211 receives the power supply voltage VCC through its input terminal, generates a preset divided voltage according to the power supply voltage VCC, and then outputs the preset divided voltage through its output terminal.

[0115] Specifically, the first voltage follower circuit 212 receives a preset voltage through its input terminal, amplifies the preset divided voltage by the same multiple, and generates a preset difference value V TEMP and transmits the preset difference value V TEMP Output; the preset difference V TEMP It is a voltage signal corresponding to the preset temperature difference.

[0116] It should be noted that, in general, due to the existence of errors, the preset difference V generated by the first voltage follower circuit 212 TEMP It is only close to the preset voltage division, but not completely equal. However, it is also necessary to ensure that the error is within the allowable range. If the error is too large, the first voltage follower circuit 212 needs to be repaired or replaced.

[0117] Specifically, the first subtraction circuit 213 receives the ambient temperature signal V AMB , and receives the preset difference value V through its inverting input terminal TEMP ; After that, the ambient temperature signal V AMB Subtract the preset difference value V from TEMP , generating a target temperature signal; and, outputting the target temperature signal through its output terminal.

[0118] The target temperature signal voltage value is equal to the voltage value corresponding to the target temperature, that is, the target temperature signal is an electrical signal corresponding to the target temperature.

[0119] Specifically, the second voltage follower circuit 214 receives the limiter temperature signal V LIMITTER , the limiter temperature signal V LIMITTER Perform the same-multiplication amplification to generate a limiter-following temperature signal, and output the limiter-following temperature signal through its output end.

[0120] It should be noted that, in general, due to the existence of errors, the limiter follower temperature signal generated by the second voltage follower circuit 214 is only close to the limiter temperature signal V LIMITTER , and cannot be completely equal, but it is also necessary to ensure that the error is within the allowable range. If the error is too large, the second voltage follower circuit 214 needs to be repaired or replaced.

[0121] It should also be noted that since the limiter follows the temperature signal close to the limiter temperature signal V LIMITTER , while the limiter temperature signal V LIMITTER It is an electrical signal corresponding to the limiter temperature, so the limiter follower temperature signal is also an electrical signal corresponding to the limiter temperature.

[0122] Specifically, the first comparison circuit 215 receives the limiter follower temperature signal through its non-inverting input terminal and receives the target temperature signal through its inverting input terminal; and compares the limiter follower temperature signal with the target temperature signal.

[0123] It should be noted that since the limiter follower temperature signal is an electrical signal corresponding to the limiter temperature, and the target temperature signal is an electrical signal corresponding to the target temperature, comparing the limiter follower temperature signal with the target temperature signal is equivalent to comparing the limiter temperature with the target temperature.

[0124] Further, when the limiter follows the temperature signal that is greater than the target temperature signal, that is, when the comparison result is that the limiter temperature is greater than the target temperature, the control signal RELAY_CTR is output through its output end; when the limiter follows the temperature signal that is less than or equal to the target temperature signal, that is, when the comparison result is that the limiter temperature is less than or equal to the target temperature, the control signal RELAY_CTR is not output.

[0125] Figure 2a The structure shown can be implemented using a suitable circuit topology, which is not specifically limited here. As long as the functions of the above-mentioned circuits can be realized, they are all within the protection scope of this application.

[0126] Optionally, a specific implementation of the first voltage divider circuit 211 has a structure as follows: Figure 2b , comprising: a first resistor R1 and a second resistor R2; wherein:

[0127] The first resistor R1 and the second resistor R2 are connected in series, one end of the series connection receives the power supply voltage VCC, the other end of the series connection is grounded, and the midpoint of the series connection outputs a preset voltage.

[0128] It should be noted that the preset voltage division is set by the first resistor R1 and the second resistor R2 according to actual requirements; therefore, the preset voltage division can also be adjusted by adjusting the first resistor R1 and the second resistor R2; wherein the preset voltage division is greater than or equal to zero.

[0129] In this embodiment, a specific implementation of the first voltage follower circuit 212 has a structure as follows: Figure 2b , including: a first operational amplifier U2A and a third resistor R3; wherein:

[0130] The non-inverting input terminal of the first operational amplifier U2A serves as the input terminal of the first voltage follower circuit 212 , and the inverting input terminal is connected to the output terminal thereof through the third resistor R3 , and the connection point serves as the output terminal of the first voltage follower circuit 212 .

[0131] The positive power supply terminal of the first operational amplifier U2A receives a positive power supply voltage, and the negative power supply terminal is grounded.

[0132] In this embodiment, a specific implementation of the first subtraction circuit 213 has a structure as follows: Figure 2b, including: a second operational amplifier U2B, a third capacitor C3, a second inductor L2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a ninth resistor R9; wherein:

[0133] The non-inverting input terminal of the second operational amplifier U2B is connected to one end of the sixth resistor R6, and the connection point serves as the non-inverting input terminal of the first subtraction circuit through the fifth resistor R5; the other end of the sixth resistor R6 is grounded.

[0134] The inverting input terminal of the second operational amplifier U2B is connected to one end of the fourth resistor R4 , and the connection point is connected to one end of the seventh resistor R7 ; the other end of the fourth resistor R4 serves as the inverting input terminal of the first subtraction circuit 213 .

[0135] The other end of the seventh resistor R7 is connected to the output end of the second operational amplifier U2B, and the connection point is connected to one end of the eighth resistor R8.

[0136] The other end of the eighth resistor R8, one end of the ninth resistor R9 and one end of the third capacitor C3 are all connected, and the connection point is connected to one end of the second inductor L2; the other end of the ninth resistor R9 is grounded; the other end of the third capacitor C3 is grounded; the other end of the first inductor L1 serves as the output end of the first subtraction circuit 213.

[0137] The positive power supply terminal of the third operational amplifier U2B receives the positive power supply voltage, and the negative power supply terminal is grounded.

[0138] In this embodiment, a specific implementation of the second voltage follower circuit 214 has a structure as follows: Figure 2b , including: a third operational amplifier U2C, a fourth capacitor C4, a third inductor L3, a tenth resistor R10, an eleventh resistor R11 and a twelfth resistor R12; wherein:

[0139] The non-inverting input terminal of the third operational amplifier U2C serves as the input terminal of the second voltage follower circuit 214; the inverting input terminal of the third operational amplifier circuit U2C is connected to its output terminal through the tenth resistor R10, and the connection point is connected to one end of the eleventh resistor R11.

[0140] The other end of the eleventh resistor R11, one end of the twelfth resistor R12, one end of the fourth capacitor C4 and one end of the third inductor L3 are all connected; the other end of the twelfth resistor R12 is grounded; the other end of the fourth capacitor C4 is grounded; the other end of the third inductor L3 serves as the output end of the second voltage follower circuit 214.

[0141] The positive power supply terminal of the third operational amplifier U2C receives a positive power supply voltage, and the negative power supply terminal is grounded.

[0142] In this embodiment, a specific implementation of the first comparison circuit 215 has a structure as follows: Figure 2b , comprising: a fourth operational amplifier circuit U2D, a thirteenth resistor R13, a fifth capacitor C5 and a fourth inductor L4; wherein:

[0143] The non-inverting input terminal of the fourth operational amplifier circuit U2D serves as the non-inverting input terminal of the first comparison circuit 215, the inverting input terminal serves as the inverting input terminal of the first comparison circuit 215, the output terminal is connected to one end of the fourth inductor L4 through the thirteenth resistor R13, and the other end of the fourth inductor L4 serves as the output terminal of the first comparison circuit 215.

[0144] The positive power supply terminal of the fourth operational amplifier circuit U2D is connected to one end of the fifth capacitor C5, the connection point receives the positive power supply voltage, and the other end of the fifth capacitor C5 is grounded; the negative power supply terminal of the fourth operational amplifier circuit U2D is grounded.

[0145] Another logic operation circuit for determining the target temperature according to the ambient temperature has a specific structure as shown in FIG. Figure 3a , including: a second voltage divider circuit 221, a third voltage follower circuit 222, a first adding circuit 223, a fourth voltage follower circuit 224 and a second comparison circuit 225.

[0146] Specifically, the second voltage divider circuit 221 receives the power supply voltage VCC through its input terminal, generates a preset divided voltage according to the power supply voltage VCC, and then outputs the preset divided voltage through its output terminal.

[0147] It should be noted that the preset voltage division is set according to actual requirements; and the generated preset voltage division can be adjusted by adjusting the resistance in the second voltage division circuit 221, wherein the preset voltage division is greater than or equal to zero.

[0148] Specifically, the third voltage follower circuit 222 receives a preset voltage through its input terminal, amplifies the preset divided voltage by the same multiple, and generates a preset difference value V TEMP and transmits the preset difference value V TEMP Output; the preset difference V TEMP It is a voltage signal corresponding to the preset temperature difference.

[0149] It should be noted that, in general, due to the existence of errors, the third voltage follower circuit 222 generates a preset difference value V TEMP It is only close to the preset voltage division, but not completely equal. However, it is also necessary to ensure that the error is within the allowable range. If the error is too large, the third voltage follower circuit 222 needs to be repaired or replaced.

[0150] Specifically, the first adding circuit 223 receives the limiter temperature signal V through its first input terminal. LIMITTER, and receives a preset difference value V through its second input terminal TEMP ; After that, the limiter temperature signal V LIMITTER and the preset difference V TEMP The temperature signals are summed to generate a limiter conversion temperature signal; and the limiter conversion temperature signal is output through its output terminal.

[0151] It should be noted that due to the limiter temperature signal V LIMITTER The corresponding temperature value is the limiter temperature, and the difference with the preset value V TEMP The corresponding temperature value is the preset temperature difference, so the temperature value corresponding to the limiter conversion temperature signal is equal to the limiter temperature plus the preset temperature difference.

[0152] Specifically, the fourth voltage follower circuit 224 receives the limiter conversion temperature signal through its input terminal, amplifies the limiter conversion temperature signal by the same multiple, generates a limiter follower signal, and outputs the limiter follower temperature signal through its output terminal.

[0153] It should be noted that, under normal circumstances, the limiter follower temperature signal generated by the fourth voltage follower circuit 224 is only close to the limiter temperature signal V LIMITTER , and cannot be completely equal, but it is also necessary to ensure that the error is within the allowable range. If the error is too large, the fourth voltage follower circuit 224 needs to be repaired or replaced.

[0154] It should also be noted that since the limiter following temperature signal is close to the limiter conversion temperature signal, and the temperature value corresponding to the limiter conversion temperature signal is equal to the limiter temperature plus the preset temperature difference, the temperature value corresponding to the limiter following temperature signal is equal to the limiter temperature plus the preset temperature difference.

[0155] Specifically, the second comparison circuit 225 receives the limiter follower temperature signal through its non-inverting input terminal, and receives the ambient temperature signal V through its inverting input terminal. AMB ; And, the limiter follows the temperature signal and the ambient temperature signal V AMB Make a comparison.

[0156] It should be noted that the temperature value corresponding to the limiter follower temperature signal is equal to the limiter temperature plus the preset temperature difference, and the temperature value corresponding to the ambient temperature signal V AMB The corresponding temperature value is the ambient temperature, so comparing the limiter follower temperature signal with the ambient temperature signal is equivalent to comparing the sum of the limiter temperature plus the preset temperature difference with the ambient temperature, so it is equivalent to comparing the limiter temperature with the difference between the ambient temperature and the preset temperature difference, and the difference between the ambient temperature and the preset temperature difference is equal to the target temperature, so it is also equivalent to comparing the limiter temperature with the target temperature.

[0157] Furthermore, when the limiter follower temperature signal is greater than the ambient temperature signal V AMB When the comparison result is that the limiter temperature is greater than the target temperature, the control signal RELAY_CTR is output through its output terminal; when the limiter follower temperature signal is less than or equal to the ambient temperature signal V AMB When, that is, when the comparison result is that the limiter temperature is less than or equal to the target temperature, the control signal RELAY_CTR is not output.

[0158] Figure 3a The structure shown can be implemented using a suitable circuit topology, which is not specifically limited here. As long as the functions of the above-mentioned circuits can be realized, they are all within the protection scope of this application.

[0159] Optionally, a specific implementation of the second voltage divider circuit 221 has a structure as follows: Figure 3b , including: a fourteenth resistor R14 and a fifteenth resistor R15; wherein:

[0160] The fourteenth resistor R14 and the fifteenth resistor R15 are connected in series, one end of the series connection receives the power supply voltage VCC, the other end of the series connection is grounded, and the midpoint of the series connection outputs a preset voltage.

[0161] It should be noted that the preset voltage division is set by the fourteenth resistor R14 and the fifteenth resistor R15 according to actual requirements; therefore, the preset voltage division can also be adjusted by adjusting the fourteenth resistor R14 and the fifteenth resistor R15; wherein the preset voltage division is greater than or equal to zero.

[0162] In this embodiment, a specific implementation of the second voltage follower circuit 222 has a structure as follows: Figure 3b , including: a fifth operational amplifier U2E and a sixteenth resistor R16; wherein:

[0163] The non-inverting input terminal of the fifth operational amplifier U2E serves as the input terminal of the third voltage follower circuit 222 , the inverting input terminal is connected to its output terminal through the sixteenth resistor R16 , and the connection point between its output terminal and the sixteenth resistor R16 serves as the output terminal of the second voltage follower circuit 222 .

[0164] The positive power supply terminal of the fifth operational amplifier U2E receives a positive power supply voltage, and the negative power supply terminal is grounded.

[0165] In this embodiment, a specific implementation of the first adding circuit 223 has a structure as follows: Figure 3b , including: a sixth operational amplifier U2F, a sixth capacitor C6, a fifth inductor L5, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21 and a twenty-second resistor R22; wherein:

[0166] The non-inverting input terminal of the sixth operational amplifier U2F is connected to one end of the eighteenth resistor R18, and the connection point is connected to one end of the nineteenth resistor R19; the other end of the eighteenth resistor R18 serves as the first input terminal of the first addition circuit 223; the other end of the nineteenth resistor R19 serves as the second input terminal of the first addition circuit 223.

[0167] The inverting input terminal of the sixth operational amplifier U2F, one end of the seventeenth resistor R17, and one end of the twentieth resistor R20 are all connected; the other end of the seventeenth resistor R17 is grounded; the other end of the twentieth resistor R20, the output terminal of the sixth operational amplifier U2F, and one end of the twenty-first resistor R21 are all connected; the other end of the twenty-first resistor R21, one end of the twenty-second resistor R22, one end of the sixth capacitor C6, and one end of the fifth inductor L5 are all connected; the other end of the fifth inductor L5 serves as the output terminal of the first adding circuit 223; the other end of the twenty-second resistor R22 and the other end of the sixth capacitor C6 are both grounded.

[0168] The positive power supply terminal of the sixth operational amplifier U2F receives the positive power supply voltage, and the negative power supply terminal is grounded.

[0169] In this embodiment, a specific implementation of the fourth voltage follower circuit 224 has a structure as follows: Figure 3b , including: a seventh operational amplifier U2G, a seventh capacitor C7, a sixth inductor L6, a twenty-third resistor R23, a twenty-fourth resistor R24 ​​and a twenty-fifth resistor R25; wherein:

[0170] The non-inverting input terminal of the seventh operational amplifier U2G serves as the input terminal of the fourth voltage follower circuit 224, and the inverting input terminal is connected to its output terminal through the twenty-third resistor R23, and the connection point between its output terminal and the twenty-third resistor R23 is connected to one end of the twenty-fourth resistor R24; the other end of the twenty-fourth resistor R24, one end of the twenty-fifth resistor R25, one end of the seventh capacitor C7 and one end of the sixth inductor L6 are all connected; the other end of the twenty-fifth resistor R25 is grounded; the other end of the seventh capacitor C7 is grounded; the other end of the sixth inductor L6 serves as the output terminal of the fourth voltage follower circuit 224.

[0171] The positive power supply terminal of the seventh operational amplifier U2G receives a positive power supply voltage, and the negative power supply terminal is grounded.

[0172] In this embodiment, a specific implementation of the second comparison circuit 225 has a structure as follows: Figure 3b , including: an eighth operational amplifier circuit U2H, a twenty-sixth resistor R26, an eighth capacitor C8 and a seventh inductor L7; wherein:

[0173] The non-inverting input terminal of the eighth operational amplifier circuit U2H serves as the non-inverting input terminal of the second comparison circuit 225, the inverting input terminal serves as the inverting input terminal of the second comparison circuit 225, the output terminal is connected to one end of the seventh inductor L7 through the twenty-sixth resistor R26, and the other end of the seventh inductor L7 serves as the output terminal of the second comparison circuit 225.

[0174] The positive power supply terminal of the eighth operational amplifier circuit U2H is connected to one end of the eighth capacitor C8, and the connection point receives the positive power supply voltage. The other end of the eighth capacitor C8 is grounded; the negative power supply terminal of the eighth operational amplifier circuit U2H is grounded.

[0175] Another logic operation circuit for determining the target temperature according to the ambient temperature has a specific structure as shown in FIG. Figure 4a , including: a third voltage divider circuit 231, a fifth voltage follower circuit 232, a second subtraction circuit 233, a third subtraction circuit 234 and a first hysteresis comparison circuit 235.

[0176] Specifically, the third voltage-dividing circuit 231 receives the power supply voltage VCC through its input terminal, generates a preset divided voltage according to the power supply voltage VCC, and then outputs the preset divided voltage through its output terminal.

[0177] It should be noted that the preset voltage division is set according to actual requirements; and the generated preset voltage division can be adjusted by adjusting the resistance in the third voltage division circuit 231, wherein the preset voltage division is greater than or equal to zero.

[0178] Specifically, the fifth voltage follower circuit 232 receives a preset voltage through its input terminal, amplifies the preset divided voltage by the same multiple, and generates a preset difference value V TEMP and transmits the preset difference value V TEMP Output; the preset difference V TEMP It is a voltage signal corresponding to the preset temperature difference.

[0179] It should be noted that, in general, due to the existence of errors, the preset difference V generated by the fifth voltage follower circuit 232 TEMP It is only close to the preset voltage division, but not completely equal. However, it is also necessary to ensure that the error is within the allowable range. If the error is too large, the fifth voltage follower circuit 232 needs to be repaired or replaced.

[0180] Specifically, the second subtraction circuit 233 receives the ambient temperature signal V AMB , and receives the preset difference value V through its inverting input terminal TEMP ; After that, the ambient temperature signal V AMB Subtract the preset difference value V from TEMP , generate a target temperature signal; and output the target temperature signal through its output terminal.

[0181] The target temperature signal voltage value is equal to the voltage value corresponding to the target temperature, that is, the target temperature signal is an electrical signal corresponding to the target temperature.

[0182] Specifically, the third subtraction circuit 234 receives the target temperature signal through its non-inverting input terminal and receives the limiter temperature signal V through its inverting input terminal. LIMITTER ; Then, the limiter temperature signal V is subtracted from the target temperature signal LIMITTER , generating a first comparison signal; and outputting the first comparison signal through its output terminal.

[0183] Specifically, the first hysteresis comparison circuit 235 receives the first comparison signal through its input terminal; and compares the first comparison signal with zero.

[0184] It should be noted that since the first comparison signal is equal to the target temperature signal minus the limiter temperature signal V LIMITTER , so comparing the first comparison signal with zero is equivalent to comparing the limiter temperature signal V LIMITTER and the target temperature signal, and the limiter temperature signal V LIMITTER is an electrical signal corresponding to the limiter temperature, and the target temperature signal is an electrical signal corresponding to the target temperature, so it is also equivalent to comparing the limiter temperature and the target temperature.

[0185] Further, when the first comparison signal is less than zero, that is, the comparison result is that the limiter temperature is greater than the target temperature, the control signal RELAY_CTR is output through its output end; when the first comparison signal is greater than or equal to zero, that is, the comparison result is that the limiter temperature is less than or equal to the target temperature, the control signal RELAY_CTR is not output.

[0186] Figure 4a The structure shown can be implemented using a suitable circuit topology, which is not specifically limited here. As long as the functions of the above-mentioned circuits can be realized, they are all within the protection scope of this application.

[0187] Optionally, a specific implementation of the third voltage divider circuit 231 has a structure as follows: Figure 4b , including: a twenty-seventh resistor R27 and a twenty-eighth resistor R28; wherein:

[0188] The twenty-seventh resistor R27 and the twenty-eighth resistor R28 are connected in series, one end of the series connection receives the power supply voltage VCC, the other end of the series connection is grounded, and the midpoint of the series connection outputs a preset voltage.

[0189] It should be noted that the preset voltage division is set by the twenty-seventh resistor R27 and the twenty-eighth resistor R28 according to actual requirements; therefore, the preset voltage division can also be controlled by adjusting the twenty-seventh resistor R27 and the twenty-eighth resistor R28; wherein the preset voltage division is greater than or equal to zero.

[0190] In this embodiment, a specific implementation of the fifth voltage follower circuit 232 has a structure as follows: Figure 4b , including: a ninth operational amplifier U2I and a twenty-ninth resistor R29; wherein:

[0191] The non-inverting input terminal of the ninth operational amplifier U2I serves as the input terminal of the fifth voltage follower circuit 232, the inverting input terminal is connected to its output terminal through the twenty-ninth resistor R29, and the connection point between its output terminal and the twenty-ninth resistor R29 serves as the output terminal of the fifth voltage follower circuit 232.

[0192] The positive power supply terminal of the ninth operational amplifier U2I receives the positive power supply voltage, and the negative power supply terminal receives.

[0193] In this embodiment, a specific implementation of the second subtraction circuit 233 is as follows: Figure 4b , including: a tenth operational amplifier U2J, a thirtieth resistor R30, a thirty-first resistor R31, a thirty-second resistor R32 and a thirty-third resistor R33; wherein:

[0194] The non-inverting input terminal of the tenth operational amplifier U2J, one end of the thirty-first resistor R31 and one end of the thirty-second resistor R32 are all connected; the other end of the thirty-first resistor R31 serves as the non-inverting input terminal of the second subtraction circuit 233; the other end of the thirty-second resistor R32 is grounded.

[0195] The inverting input terminal of the tenth operational amplifier U2J, one end of the 30th resistor R30 and one end of the 33rd resistor R33 are all connected; the other end of the 30th resistor R30 serves as the inverting input terminal of the second subtraction circuit 233; the other end of the 33rd resistor R33 is connected to the output terminal of the tenth operational amplifier U2J, and the connection point serves as the output terminal of the second subtraction circuit 233.

[0196] The positive power supply terminal of the tenth operational amplifier U2J receives the positive power supply voltage, and the negative power supply terminal is grounded.

[0197] In this embodiment, a specific implementation of the third subtraction circuit 234 is as follows: Figure 4b , including: an eleventh operational amplifier U2K, an eighth inductor L8, a thirty-fourth resistor R34, a thirty-fifth resistor R35, a thirty-sixth resistor R36, a thirty-seventh resistor R37 and a thirty-eighth resistor R38; wherein:

[0198] The non-inverting input terminal of the eleventh operational amplifier U2K, one end of the thirty-fifth resistor R35 and one end of the thirty-sixth resistor R36 are all connected; the other end of the thirty-fifth resistor R35 serves as the non-inverting input terminal of the third subtraction circuit 234; the other end of the thirty-sixth resistor R36 is grounded.

[0199] The inverting input terminal of the eleventh operational amplifier U2K, one end of the thirty-fourth resistor R34 and one end of the thirty-seventh resistor R37 are all connected; the other end of the thirty-fourth resistor R34 serves as the inverting input terminal of the third subtraction circuit 234; the other end of the thirty-seventh resistor R37 is connected to the output terminal of the eleventh operational amplifier U2K, and the connection point is connected to one end of the eighth inductor L8 through the thirty-eighth resistor R38; the other end of the eighth inductor L8 serves as the output terminal of the third subtraction circuit 234.

[0200] The positive power supply terminal of the eleventh operational amplifier U2K receives the positive power supply voltage, and the negative power supply terminal is grounded.

[0201] In this embodiment, a specific implementation of the first hysteresis comparison circuit 235 has a structure as follows: Figure 4b , including: a twelfth operational amplifier U2L, a ninth capacitor C9, a ninth inductor L9, a thirty-ninth resistor R39, a fortieth resistor R40, a forty-first resistor R41 and a forty-second resistor R42; wherein:

[0202] The non-inverting input terminal of the twelfth operational amplifier U2L, one end of the thirty-ninth resistor R39, and one end of the forty-first resistor R41 are all connected; the other end of the thirty-ninth resistor R39 is grounded; the other end of the forty-first resistor R41, the output terminal of the twelfth operational amplifier U2L, and one end of the forty-second resistor R42 are all connected; the other end of the forty-second resistor R42 is connected to one end of the ninth inductor L9, and the other end of the ninth inductor L9 serves as the output terminal of the first hysteresis comparison circuit 235.

[0203] The inverting input terminal of the twelfth operational amplifier U2L serves as the input terminal of the first hysteresis comparator circuit 235 through the fortieth resistor R40.

[0204] The positive power supply terminal of the twelfth operational amplifier U2L is connected to one end of the ninth capacitor C9, the connection point receives the positive power supply voltage, and the other end of the ninth capacitor C9 is grounded; the negative power supply terminal of the twelfth operational amplifier U2L is grounded.

[0205] Another logic operation circuit for determining the target temperature according to the ambient temperature has a specific structure as shown in FIG. Figure 5a , including: a fourth voltage divider circuit 241, a sixth voltage follower circuit 242, a second addition circuit 243, a fourth subtraction circuit 244 and a second hysteresis comparison circuit 245.

[0206] Specifically, the fourth voltage-dividing circuit 241 receives the power supply voltage VCC through its input terminal, generates a preset divided voltage according to the power supply voltage VCC, and then outputs the preset divided voltage through its output terminal.

[0207] It should be noted that the preset voltage division is set according to actual requirements; and the generated preset voltage division can be adjusted by adjusting the resistance in the fourth voltage division circuit 241, wherein the preset voltage division is greater than or equal to zero.

[0208] Specifically, the sixth voltage follower circuit 242 receives a preset voltage through its input terminal, amplifies the preset divided voltage by the same multiple, and generates a preset difference value V TEMP and transmits the preset difference value V TEMP Output; the preset difference V TEMP It is a voltage signal corresponding to the preset temperature difference.

[0209] It should be noted that, in general, due to the existence of errors, the preset difference V generated by the sixth voltage follower circuit 242 TEMP It is only close to the preset voltage division and cannot be completely equal, but it is also necessary to ensure that the error is within the allowable range. If the error is too large, the sixth voltage follower circuit 242 needs to be repaired or replaced.

[0210] Specifically, the second adding circuit 243 receives the limiter temperature signal V through its first input terminal. LIMITTER , and receiving a preset difference value V through the second input terminal TEMP ; After that, the limiter temperature signal V LIMITTER and the preset difference V TEMP The temperature signals are summed to generate a limiter conversion temperature signal; and the limiter conversion temperature signal is output through its output terminal.

[0211] It should be noted that due to the limiter temperature signal V LIMITTER The corresponding temperature value is the limiter temperature, and the difference with the preset value V TEMP The corresponding temperature value is the preset temperature difference, so the temperature value corresponding to the limiter conversion temperature signal is equal to the limiter temperature plus the preset temperature difference.

[0212] Specifically, the fourth subtraction circuit 244 receives the ambient temperature signal V AMB , and receives the temperature signal converted by the limiter through its inverting input terminal; then, the ambient temperature signal V AMB Based on the temperature signal converted by the limiter, a second comparison signal is generated; and the second comparison signal is output through its output terminal.

[0213] Specifically, the second hysteresis comparison circuit 245 receives the second comparison signal through an input terminal; and compares the comparison signal with zero.

[0214] It should be noted that since the second comparison signal is equal to the ambient temperature signal V AMB Subtract the limiter conversion temperature signal, so comparing the second comparison signal with zero is equivalent to comparing the limiter conversion temperature signal with the ambient temperature signal V AMB For comparison, Figure 3a As can be seen from the embodiment shown, the limiter converts the temperature signal and the ambient temperature signal V AMB The comparison is equivalent to comparing the limiter temperature to the target temperature.

[0215] Further, when the second comparison signal is less than zero, that is, the comparison result is that the limiter temperature is greater than the target temperature, the control signal RELAY_CTR is output through its output end; when the second comparison signal is greater than zero, that is, the comparison result is that the limiter temperature is less than or equal to the target temperature, the control signal RELAY_CTR is not output.

[0216] Figure 5a The structure shown can be implemented using a suitable circuit topology, which is not specifically limited here. As long as the functions of the above-mentioned circuits can be realized, they are all within the protection scope of this application.

[0217] Optionally, a specific implementation of the fourth voltage divider circuit 241 has a structure as follows: Figure 5b , including: a forty-third resistor R43 and a forty-fourth resistor R44; wherein:

[0218] The forty-third resistor R43 and the forty-fourth resistor R44 are connected in series, one end of the series connection receives the power supply voltage VCC, the other end of the series connection is grounded, and the midpoint of the series connection outputs a preset voltage.

[0219] It should be noted that the preset voltage division is set according to actual requirements through the forty-third resistor R43 and the forty-fourth resistor R44; therefore, the preset voltage division can also be adjusted by adjusting the forty-third resistor R43 and the forty-fourth resistor R44; wherein the preset voltage division is greater than or equal to zero.

[0220] In this embodiment, a specific implementation of the sixth voltage follower circuit 242 has a structure as follows: Figure 5b , including: a thirteenth operational amplifier U2M and a forty-fifth resistor R45; wherein:

[0221] The non-inverting input terminal of the thirteenth operational amplifier U2M serves as the input terminal of the sixth voltage follower circuit 242, the inverting input terminal is connected to its output terminal through the forty-fifth resistor R45, and the connection point between its output terminal and the forty-fifth resistor R45 serves as the output terminal of the sixth voltage follower circuit 242.

[0222] The positive power supply terminal of the thirteenth operational amplifier U2M receives a positive power supply voltage, and the negative power supply terminal receives a negative power supply voltage.

[0223] In this embodiment, a specific implementation of the second adding circuit 243 is as follows: Figure 5b , including: a fourteenth operational amplifier U2N, a forty-sixth resistor R46, a forty-seventh resistor R47, a forty-eighth resistor R48 and a forty-ninth resistor R49; wherein:

[0224] The non-inverting input terminal of the fourteenth operational amplifier U2N, one end of the forty-sixth resistor R46 and one end of the forty-seventh resistor R47 are all connected; the other end of the forty-sixth resistor R46 serves as the first input terminal of the second adding circuit 243; the other end of the forty-seventh resistor R47 serves as the second input terminal of the second adding circuit 243.

[0225] The inverting input terminal of the fourteenth operational amplifier U2N, one end of the forty-eighth resistor R48 and one end of the forty-ninth resistor R49 are all connected; the other end of the forty-eighth resistor R48 is grounded; the other end of the forty-ninth resistor R49 is connected to the output terminal of the fourteenth operational amplifier U2N, and the connection point serves as the output terminal of the second addition circuit 243.

[0226] The positive power supply terminal of the fourteenth operational amplifier U2N receives a positive power supply voltage, and the negative power supply terminal receives a negative power supply voltage.

[0227] In this embodiment, a specific implementation of the fourth subtraction circuit 244 is as follows: Figure 5b , including: a fifteenth operational amplifier U20, a tenth inductor L10, a fiftieth resistor R50, a fifty-first resistor R51, a fifty-second resistor R52, a fifty-third resistor R53 and a fifty-fourth resistor R54; wherein:

[0228] The non-inverting input terminal of the fifteenth operational amplifier U2O, one end of the fifty-first resistor R51 and one end of the fifty-second resistor R52 are all connected; the other end of the fifty-first resistor R51 serves as the non-inverting input terminal of the fourth subtraction circuit 244; the other end of the fifty-second resistor R52 is grounded.

[0229] The inverting input terminal of the fifteenth operational amplifier U2O, one end of the fiftieth resistor R50 and one end of the fifty-third resistor R53 are all connected; the other end of the fiftieth resistor R50 serves as the inverting input terminal of the fourth subtraction circuit 244; the other end of the fifty-third resistor R53, the other end of the fifty-fourth resistor R54 and the output terminal of the fifteenth operational amplifier U2O are all connected; the other end of the fifty-fourth resistor R54 is connected to one end of the tenth inductor L10; the other end of the tenth inductor L10 serves as the output terminal of the fourth subtraction circuit 244.

[0230] The positive power supply terminal of the fifteenth operational amplifier U2O receives a positive power supply voltage, and the negative power supply terminal receives a negative power supply voltage.

[0231] In this embodiment, a specific implementation of the second hysteresis comparison circuit 245 is as follows: Figure 5b , including: a sixteenth operational amplifier U2P, a tenth capacitor C10, an eleventh inductor L11, a fifty-fifth resistor R55, a fifty-sixth resistor R56, a fifty-seventh resistor R87 and a fifty-eighth resistor R58; wherein:

[0232] The non-inverting input terminal of the sixteenth operational amplifier U2P, one end of the fifty-fifth resistor R55, and one end of the fifty-seventh resistor R57 are all connected; the other end of the fifty-fifth resistor R55 is grounded; the other end of the fifty-seventh resistor R57, the output terminal of the sixteenth operational amplifier U2P, and one end of the fifty-eighth resistor R58 are all connected; the other end of the fifty-eighth resistor R58 is connected to one end of the eleventh inductor L11, and the other end of the eleventh inductor L11 serves as the output terminal of the second hysteresis comparison circuit 245.

[0233] The inverting input terminal of the twelfth operational amplifier U2L serves as the input terminal of the first hysteresis comparator circuit 235 through the fortieth resistor R40.

[0234] The positive power supply terminal of the sixteenth operational amplifier U2P is connected to one end of the tenth capacitor C10, and the connection point receives the positive power supply voltage. The other end of the tenth capacitor C10 is grounded; the negative power supply terminal of the sixteenth operational amplifier U2P is grounded.

[0235] The specific implementation methods of the above-mentioned logic operation circuits are only some examples. In practical applications, they are not limited to the above-mentioned forms and may depend on the application environment. All implementation methods that can realize their corresponding functions are within the protection scope of this application.

[0236] The remaining structures and principles are the same as those in the above embodiment and will not be described in detail here.

[0237] In another embodiment of the present invention, an implementation of the temperature acquisition circuit 110 is provided, and the specific structure is as follows: Figure 6a, including: a first temperature sensor 310 , a second temperature sensor 320 , a first transfer circuit 330 and a second transfer circuit 340 .

[0238] Specifically, the first temperature sensor 310 is used as the first acquisition end of the temperature acquisition circuit 110, and is disposed in the cabinet of the wind profiler radar to collect the ambient temperature of the wind profiler radar, and, according to the corresponding relationship between the temperature and the voltage value, converts the ambient temperature value into a corresponding voltage value, that is, an electrical signal; wherein the electrical signal is recorded as the ambient temperature signal V AMB ; Afterwards, the ambient temperature signal V AMB Output.

[0239] Specifically, the second temperature sensor 320 is used as the second acquisition terminal of the temperature acquisition circuit 110, and is disposed on the limiter to acquire the limiter temperature, and, according to the corresponding relationship between the temperature value and the voltage value, converts the limiter temperature into a corresponding voltage value, i.e., an electrical signal; wherein, this electrical signal is recorded as the limiter temperature signal V LIMITTER ; After that, the limiter temperature signal V LIMITTER Output.

[0240] It should be noted that both the first temperature sensor 310 and the second temperature sensor 320 can be a temperature sensor of model LM35CZ. When the temperature is 0°C, the output voltage value of this temperature sensor is 0V. After that, the output voltage value increases by 10mV for every 1°C increase in temperature.

[0241] Specifically, the first transfer circuit 330 receives the ambient temperature signal V AMB , the ambient temperature signal V AMB The ambient temperature signal V AMB Output; wherein the output end of the first transfer circuit 330 serves as the first output end of the temperature acquisition circuit 110.

[0242] Specifically, the second transfer circuit 340 receives the limiter temperature signal V LIMITTER , the limiter temperature signal V LIMITTER The limiter temperature signal V is transmitted to its output terminal and LIMITTER Output; wherein the output end of the second transfer circuit 340 serves as the second output end of the temperature acquisition circuit 110.

[0243] Optionally, the temperature acquisition circuit 110 Figure 6a As shown in the basis, Figure 6b , further comprising: a first power supply circuit 350 and a second power supply circuit 360 .

[0244] Specifically, the first power supply circuit 350 receives a power supply voltage through a first input terminal and is grounded through a second input terminal; a first output terminal is connected to a positive power supply terminal of the first temperature sensor 310, and a second output terminal is connected to a negative power supply terminal of the first temperature sensor 310; wherein the first input terminal of the first power supply circuit 350 serves as a first input terminal of the temperature acquisition circuit 110, and the second input terminal serves as a second input terminal of the temperature acquisition circuit 110.

[0245] Specifically, the second power supply circuit 360 receives a power supply voltage through a first input terminal and is grounded through a second input terminal; a first output terminal is connected to a positive power supply terminal of the second temperature sensor 320, and a second output terminal is connected to a negative power supply terminal of the second temperature sensor 320; wherein the first input terminal of the second power supply circuit 360 serves as a third input terminal of the temperature acquisition circuit 110, and the second input terminal serves as a fourth input terminal of the temperature acquisition circuit 110.

[0246] Figure 6a and Figure 6b The structure shown can be implemented using a suitable circuit topology, which is not specifically limited here. As long as the functions of the above-mentioned circuits can be realized, they are all within the protection scope of this application.

[0247] Optionally, a specific implementation of the temperature acquisition circuit 110 has a structure as follows: Figure 6c , including: a first temperature sensor 310, a second temperature sensor 320, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a twelfth inductor L12 and a thirteenth inductor L13; wherein:

[0248] The first temperature sensor 310 serves as the first acquisition terminal of the temperature acquisition circuit 110; the positive power supply terminal of the first temperature sensor 310 is connected to one end of the eleventh capacitor C11, and the connection point serves as the first input terminal of the temperature acquisition circuit 110; the negative power supply terminal of the first temperature sensor 310 is connected to the other end of the eleventh capacitor C11, and the connection point serves as the second input terminal of the temperature acquisition circuit 110; the output terminal of the first temperature sensor 310, one end of the twelfth capacitor C12 and one end of the twelfth inductor L12 are all connected; the other end of the twelfth capacitor C12 is grounded; the other end of the twelfth inductor L12 serves as the first output terminal of the temperature acquisition circuit 110.

[0249] The second temperature sensor 320 serves as the first acquisition terminal of the temperature acquisition circuit 110; the positive power supply terminal of the second temperature sensor 320 is connected to one end of the thirteenth capacitor C13, and the connection point serves as the third input terminal of the temperature acquisition circuit 110; the negative power supply terminal of the second temperature sensor 320 is connected to the other end of the thirteenth capacitor C13, and the connection point serves as the fourth input terminal of the temperature acquisition circuit 110; the output terminal of the second temperature sensor 320, one end of the fourteenth capacitor C14 and one end of the thirteenth inductor L13 are all connected; the other end of the fourteenth capacitor C14 is grounded; the other end of the thirteenth inductor L13 serves as the second output terminal of the temperature acquisition circuit 110.

[0250] The specific implementation of the temperature acquisition circuit is only an example. It is not limited to the above forms in actual applications. It can be determined according to the application environment. All implementation methods that can achieve the corresponding functions are within the protection scope of this application.

[0251] The remaining structures and principles are the same as those in the above embodiment and will not be described in detail here.

[0252] In another embodiment of the present invention, an implementation of the driving circuit 130 is provided, and the specific structure is as follows: Figure 7 , including: a control circuit 410 and a power supply circuit 420;

[0253] When the control circuit 410 receives the control signal RELAY_CTR through its control end, the control circuit 410 turns on its own circuit, generates and outputs a power supply signal through its output end; when the control circuit 410 does not receive the control signal RELAY_CTR, the control circuit 410 itself forms an open circuit, does not generate a power supply signal, and therefore does not output a power supply signal; wherein, the control end of the control circuit serves as the control end of the drive circuit 130.

[0254] When the power supply circuit 420 receives a power supply signal through its control end, it outputs the power supply voltage to the positive power supply end and the negative power supply end of the temperature control device through its first output end and its second output end, thereby making the temperature control device work and cooling the limiter; wherein the first output end and the second output end of the power supply circuit 420 serve as the first output end and the second output end of the driving circuit 130 respectively.

[0255] The above structure can be implemented by using a suitable circuit topology, which is not specifically limited here. As long as the functions of the above circuits can be realized, they are all within the protection scope of this application.

[0256] Optionally, a specific structure of an implementation form of the control circuit 410 includes: a fifteenth capacitor C15, a fifty-ninth resistor R59, a sixtieth resistor R60, a switch tube M, and a control part of the relay S1; wherein:

[0257] The gate of the switch tube M, one end of the fifty-ninth resistor and one end of the fifteenth capacitor C15 are all connected; the other end of the fifty-ninth resistor R59 serves as the control end of the drive circuit 130; the other end of the fifteenth capacitor C15 is connected to the source of the switch tube M, and the connection point is grounded.

[0258] The drain of the switch tube M is connected to the output end of the control part of the relay S1 through the sixtieth resistor R60; the input end of the control part of the relay S1 receives the power supply voltage VCC; wherein, the control part of the relay S1 serves as the output end of the control circuit 410.

[0259] Optionally, a specific structure of an implementation form of the power supply circuit 420 includes: an action part of the relay S1; wherein:

[0260] The control end of the action part of the relay S1 serves as the control end of the power supply circuit 420 ; the first output end of the action part of the relay S1 serves as the first output end of the power supply circuit 420 , and the second output end serves as the second output end of the power supply circuit 420 .

[0261] It should be noted that the relay S1 can use a high-current relay AQZ192, which can control the on and off of a 10A current.

[0262] Specifically, when the other end of the fifty-ninth resistor R59 receives the control signal RELAY_CTR, the switch tube is turned on, and the circuit composed of the sixtieth resistor R60 and the control part of the relay S1 forms a path, and current flows through the control part of the relay S1; thereby, the action part of the relay S1 provides a power supply voltage to the temperature control device through its first output terminal and its second output terminal.

[0263] The specific implementation of the above driving circuit is only an example, and is not limited to the above forms in actual applications. It can be determined according to its application environment. All implementation methods that can achieve its corresponding functions are within the protection scope of this application.

[0264] The remaining structures and principles are the same as those in the above embodiment and will not be described in detail here.

[0265] In another embodiment of the present invention, Figure 8a In the above embodiments and Figure 1-Figure 7 On the basis of, the temperature control circuit further includes: a DC transformer circuit 140.

[0266] The DC transformer circuit 140 receives an input voltage through its input end, and converts the input voltage into an operating voltage required by the temperature acquisition circuit 110, the logic operation circuit 120, and the drive circuit 130; then, the operating voltage is output to the power supply end of the temperature acquisition circuit 110, the power supply end of the logic operation circuit 120, and the power supply end of the drive circuit 130 through its output end.

[0267] Optionally, a specific implementation of the DC transformer circuit 140 is as follows: Figure 8b , including: chip U1, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a nineteenth capacitor C19, a fourteenth inductor L14 and a fifteenth inductor L15; wherein:

[0268] The input pin of chip U1, one end of the seventeenth capacitor C17 and one end of the fourteenth inductor L14 are all connected; the other end of the seventeenth capacitor C17 is grounded; the other end of the fourteenth inductor L14 is connected to one end of the sixteenth capacitor C16, and the connection point serves as the input end of the DC transformer circuit 140; the other end of the sixteenth capacitor C16 is grounded.

[0269] The ground pin of chip U1 is grounded; the first output pin and the second output pin of chip U1 are connected, and the connection point, one end of the fifteenth inductor L15 and one end of the eighteenth capacitor C18 are all connected; the other end of the eighteenth capacitor C18 is grounded; the other end of the fifteenth inductor L15 is connected to one end of the nineteenth capacitor C19; the connection point serves as the output end of the DC transformer circuit 140; the other end of the nineteenth capacitor C19 is grounded.

[0270] It should be noted that the chip U1 may be LM1117MP-5, which can convert a 15V input voltage into a 5V operating voltage required by the temperature acquisition circuit 110 , the logic operation circuit 120 and the drive circuit 130 .

[0271] The specific implementation of the above DC transformer circuit is only an example, and is not limited to the above forms in actual applications. It can be determined according to the application environment. All implementation methods that can achieve the corresponding functions are within the protection scope of this application.

[0272] The remaining structures and principles are the same as those in the above embodiment and will not be described in detail here.

[0273] Another embodiment of the present invention further provides a temperature control device for cooling the limiter of the wind profile radar, and its specific structure is as follows: Fig. 9 , including: a semiconductor cooling sheet 510.

[0274] It should be noted that the end of the semiconductor cooling sheet 510 that absorbs heat is the cold end, and the end that dissipates heat is the hot end.

[0275] Therefore, the cold end of the semiconductor cooling sheet 510 is arranged at one side of the limiter; and the hot end of the semiconductor cooling sheet 510 dissipates heat to the environment.

[0276] Specifically, when the limiter temperature is greater than the target temperature, the semiconductor refrigeration chip 510 receives a power supply voltage through its positive power supply terminal and negative power supply terminal; after receiving the power supply voltage, the cold end of the semiconductor refrigeration chip 510 begins to absorb the heat from the limiter by using the Peltier effect; thereafter, under the action of an external electric field, the internal electrons of the semiconductor refrigeration chip 510 move in a directed manner, and bring part of the heat on its cold end to its hot end in the form of internal energy; its hot end again uses the Peltier effect to dissipate the internal energy of the electrons into the environment in the form of heat, thereby reducing the temperature of the limiter.

[0277] Among them, the target temperature can be a temperature value set in advance according to actual conditions, or it can be the difference between the ambient temperature and the preset temperature difference; among them, the preset temperature difference is greater than or equal to zero, and no specific restrictions are made here, all of which are within the protection scope of this application.

[0278] Specifically, when the limiter temperature is less than or equal to the target temperature, the semiconductor cooling chip 510 cannot receive the power supply voltage, so the semiconductor cooling chip 510 stops working and no longer cools the limiter.

[0279] The present invention uses a semiconductor refrigeration sheet to cool the limiter when the limiter temperature is higher than the target temperature. Even if the limiter heats up severely and causes its temperature to rise again, as long as the limiter temperature is higher than the target temperature, the limiter will be cooled again by the semiconductor refrigeration sheet. Thus, the limiter temperature can be limited to fluctuate near the target temperature, ensuring that the limiter can be effectively cooled when it heats up severely.

[0280] Because when the power supply voltage remains unchanged, the maximum temperature difference between the cold end and the hot end of the semiconductor refrigeration plate 510 is fixed. When the temperature difference between the cold end and the hot end reaches the maximum temperature difference, the temperature of the cold end will not continue to decrease under the premise that the temperature of the hot end remains unchanged. If you want to continue to lower the temperature of the cold end, you need to achieve this by lowering the temperature of the hot end.

[0281] Therefore, another embodiment of the present invention also provides another temperature control device, such as Fig.10 , in the above embodiments and Fig. 9 On the basis of, it also includes: heat dissipation equipment; and the specific structure of the heat dissipation equipment is as follows Fig.10 , including: a heat insulation board 520 , a fan 530 and a radiator 540 .

[0282] Specifically, the hot end of the semiconductor cooling plate 510 is arranged on a vertical side of the heat sink in the radiator 540 and does not block the air inlet and outlet of the radiator 540 .

[0283] It should be noted that the hot end of the semiconductor cooling sheet 510 is connected to the heat sink 540 by means of silicone glue.

[0284] Specifically, the fan 530 is disposed on a side of the heat sink 540 opposite to the semiconductor cooling plate 510 , and a through hole is disposed at a position on the heat sink 540 where the fan 530 is disposed.

[0285] Among them, through this through hole, the fan 530 can blow air to the radiator 540 to accelerate the heat dissipation speed of the radiator; in addition, the fan is connected to the radiator 540 through a threaded connection.

[0286] It should be noted that the shape of the through hole can be circular or square, which is not specifically limited here, but is within the protection scope of this embodiment; in addition, the fan 530 can be connected to the radiator 540 through a threaded connection or a riveted connection, which is not specifically limited here, but is within the protection scope of this embodiment.

[0287] In addition, the heat insulation plate 520 is arranged on the same side of the heat sink 540 as the hot end of the semiconductor cooling plate 510 to fill the gap on the limiter that is not covered by the semiconductor cooling plate 510.

[0288] It should be noted that the heat insulation board 520 is connected to the heat sink 540 by means of glue connection via silicone.

[0289] Among them, one implementation of the heat sink 540 has a specific structure as follows Fig.11 As shown, it includes: a radiator body 541, N heat sinks 542 and an air duct cover 543.

[0290] Specifically, N heat sinks 542 are vertically arranged on the heat sink body 541 at uniform intervals, and are all parallel to the baffle of the heat sink body 541 ; wherein N is an integer greater than 1.

[0291] It should be noted that two adjacent heat sinks 542 constitute a heat sink tooth, and N heat sinks constitute N+1 heat sink teeth; and the radiator 540 needs to dissipate the heat of the bottom plate in the radiator body 541 to the environment by forming convection on the heat sink teeth.

[0292] Specifically, the air duct cover plate 543 is disposed on the heat sink 542 and is parallel to the bottom plate of the radiator body 541 .

[0293] It should be noted that, since it is difficult to form convection on the heat dissipation teeth by ordinary air cooling, in order to increase the convection, a duct cover 543 is provided on the heat sink 542 to form a closed air duct with the heat sink; and then cooperate with the fan provided on the duct cover 543 to form forced convection, so that the heat of the bottom plate in the radiator body 541 can be dissipated into the environment more quickly.

[0294] Further, it should be noted that the air duct cover can be connected to the radiator body 541 by a threaded connection, or by a riveted connection, which is not specifically limited here, but is within the scope of protection of the present invention.

[0295] Optionally, the hot end of the semiconductor cooling sheet 510 is arranged on the outside of the air duct cover 543, or the hot end of the semiconductor cooling sheet 510 is arranged on the outside of the bottom plate of the radiator body 541.

[0296] The remaining structures and principles are the same as those in the above embodiment and will not be described in detail here.

[0297] Another embodiment of the present invention further provides a temperature control system, the specific structure of which is as follows: Fig.12 , comprising: the temperature control circuit 10 and the temperature adjustment device 20 in the above embodiment; wherein:

[0298] The temperature regulating device 20 is arranged at one side of the limiter; the output end of the temperature control circuit 10 is connected to the power supply end of the temperature regulating device 20 .

[0299] It should be noted that the temperature control circuit can be arranged in the cabinet of the wind profiler radar, or can be arranged on the limiter, which is not specifically limited here, but is within the protection scope of this embodiment.

[0300] Optionally, when the temperature control device 20 includes a heat dissipation device, the temperature control circuit 10 can be arranged on one side of the temperature control device 20, adjacent to the limiter and the fan 530 in the heat dissipation device, without blocking the air inlet and outlet of the radiator 540 in the heat dissipation device.

[0301] The specific structures and working principles of the temperature control circuit 10 and the temperature regulating device 20 can be found in the above embodiments, and will not be described in detail here.

[0302] In another embodiment of the present invention, a temperature regulating limiter is provided, and its specific structure is as follows: Fig.13 , comprising: a limiter 30 and the temperature control system 40 in the above embodiment; wherein:

[0303] The temperature control system 40 is disposed on one side of the limiter 30 .

[0304] The specific structure and working principle of the temperature control system 40 can be found in the above embodiments, and will not be described in detail here.

[0305] Among them, one implementation of the limiter 30 has a specific structure as follows: Fig.14 As shown, it includes: a first-stage diode branch 610 , a second-stage diode branch 620 , a third-stage diode branch 630 , an input branch 640 and an output branch 650 .

[0306] Specifically, the first end of the first-stage diode branch 610, the first end of the second-stage diode branch 620, the first end of the third-stage diode branch 630, the output end of the input branch 640, and the input end of the output branch 650 are all connected;

[0307] The input end of the input branch 640 serves as the input end of the limiter 30; the output end of the output branch 650 serves as the output end of the limiter 30;

[0308] The second end of the first-stage diode branch 610, the second end of the second-stage diode branch 620, and the second end of the third-stage diode branch 630 are all connected, and the connection point is grounded;

[0309] The third end of the first-stage diode branch 610 , the third end of the second-stage diode branch 620 , and the third end of the third-stage diode branch 630 are all connected, and the connection point is grounded.

[0310] It should be noted that the distance between the second-stage diode branch 620 and the first-stage diode branch 610 , and the distance between the second-stage diode branch 620 and the third-stage diode branch 630 are both 1 / 4 of the electromagnetic wavelength.

[0311] In practical applications, one implementation of the first-stage diode branch 610 is as follows: Fig.14 , specifically comprising: a second diode D2, a third diode D3, a fourth diode D4 and a fifth diode D5; wherein:

[0312] The cathode of the fifth diode D5, the anode of the second diode D2, the cathode of the third diode D3 and the anode of the fourth diode D4 are all connected, and the connection point serves as the first end of the first-stage diode branch; the anode of the fifth diode D5 and the anode of the third diode D3 are connected, and the connection point serves as the second end of the first-stage diode branch; the cathode of the second diode D2 and the cathode of the fourth diode D4 are connected, and the connection point serves as the third end of the first-stage diode branch.

[0313] It should be noted that the second diode D2, the third diode D3, the fourth diode D4 and the fifth diode D5 are all high-power PIN diodes of model MLP7122, which operate between 100MHz and 200MHz, can withstand a maximum pulse power of 66dBm, and its maximum leakage power is 44dBm.

[0314] In practical applications, one implementation of the second-stage diode branch 620 is as follows: Fig.14 , specifically comprising: a sixth diode D6, a seventh diode D7 and a sixteenth inductor L16; wherein:

[0315] The cathode of the seventh diode D7, the anode of the sixth diode D6 and one end of the sixteenth inductor L16 are all connected, and the connection point serves as the first end of the second-stage diode branch 120; the anode of the seventh diode D7 serves as the second end of the second-stage diode branch 120; the cathode of the sixth diode D6 and the other end of the sixteenth inductor L16 are connected, and the connection point serves as the third end of the second-stage diode branch.

[0316] It should be noted that the sixth diode D6 and the seventh diode D7 are both low-power PIN diodes of model MLP7130, which operate between 100MHz and 200MHz, and have a maximum input power of 47dBm, which is exactly twice the maximum leakage power of the diode in the first-stage diode branch 110. Although such a design has power redundancy, it can ensure the stability and reliability of the circuit. In addition, the sixteenth inductor L16 can be a radio frequency capacitor with a self-resonant frequency of 1290MHz and an inductance of 10mH.

[0317] In practical applications, one implementation of the third-stage diode branch 630 is as follows: Fig.14 , specifically comprising: an eighth diode D8 and a ninth diode D9; wherein:

[0318] The cathode of the ninth diode D9 is connected to the anode of the eighth diode D8, and the connection point serves as the first end of the third-level diode branch 130; the anode of the ninth diode D9 serves as the second end of the third-level diode branch 130; and the cathode of the eighth diode D8 serves as the third end of the third-level diode branch 130.

[0319] It should be noted that the eighth diode D8 and the ninth diode D9 are both Schottky diodes of model BAT1504WH6327XTSAI, which are suitable for applications within 12GHz and have ultra-low parasitic capacitance, extremely low single-phase conduction time, etc. When the forward current If = 10mA, the maximum forward conduction voltage of this diode is 0.41v, and the corresponding power is 5.26dBm.

[0320] In practical applications, the twentieth capacitor C20 is used as the input circuit, and the twenty-first capacitor C21 is used as the output circuit; one end of the twentieth capacitor C20 is used as the input end of the input circuit 640, and the other end is used as the output end of the input circuit 640; one end of the twenty-first capacitor C21 is used as the input end of the output circuit 650, and the other end is used as the output end of the output circuit 650.

[0321] It should be noted that, in order to reduce losses, the self-resonant frequencies of the twentieth capacitor C20 and the twenty-first capacitor C21 are consistent with the operating frequency of the limiter 30; and, since the input signal power received by the limiter 30 is high, the twentieth capacitor C20 must be a high-voltage capacitor, and the 600F series capacitor of ATC company can be selected, with a capacitance of 18pF; in addition, the twenty-first capacitor C21 can be an 18pF RF capacitor with a self-resonant frequency of 1290MHz.

[0322] Specifically, since the intrinsic layer thickness of the diode in the second-stage diode branch 620 is thinner than the intrinsic layer thickness of the diode in the first-stage diode branch 610, the response speed to the high-power signal is fast. Therefore, when the limiter 30 receives a high-power input signal through the input end, the sixth diode D6 is turned on first, and after being turned on, it forms a low-impedance short circuit for the input signal energy.

[0323] Furthermore, after the input signal passes through 1 / 4 electromagnetic wavelength, it is transmitted to the third end of the first-stage diode branch 610. At this time, the first-stage diode branch 610 is equivalent to a high-frequency open circuit; furthermore, the energy of the input signal is mainly concentrated at the third end of the first-stage diode branch 610, so that the second diode D2 and the fourth diode D4 are quickly turned on and enter a limiting state.

[0324] Furthermore, after being limited by the first-stage diode branch 610 and the second-stage diode branch 620, the input signal is reduced to less than 19dBm; thereafter, the input signal is clamped by the third-stage diode branch 630, and the DC signal is filtered by the twenty-first capacitor C21, and the final signal output from the output end of the limiter 30 is less than 10dBm.

[0325] In addition, when the power of the input signal is relatively low, the specific structure of the limiter 30 can also be as follows: Fig.15 As shown, it includes: a first diode D1, a first inductor L1, a first capacitor C1 and a second capacitor C2; wherein:

[0326] The positive electrode of the first diode D1, one end of the first inductor L1, one end of the first capacitor C1 and one end of the second capacitor C2 are all connected; the other end of the first capacitor C1 serves as the input end of the limiter 30; the other end of the second capacitor C2 serves as the output end of the limiter 30; the cathode of the first diode D1 is connected to the other end of the first inductor L1, and the connection point is grounded.

[0327] It should be noted that the first diode D1 is a low-power PIN diode of model MLP7130; the first capacitor C1 and the second capacitor C2 are used to block the passage of DC signals; in addition, the first inductor L1 is used to provide a DC path, and can also be called a high-frequency choke.

[0328] Specifically, when the input signal is a small signal, the first diode D1 exhibits high impedance, and the insertion loss of the entire circuit is very small; when the input signal is greater than the limiting threshold of the first diode D1, the impedance of the first diode D1 decreases, resulting in an impedance mismatch of the entire circuit, so that the input signal flows from the first diode D1 into the ground, thereby achieving a limiting effect.

[0329] The remaining structures and principles are the same as those in the above embodiment and will not be described in detail here.

[0330] In practical applications, the specific structure of the temperature limiter is as follows Fig.16a and Fig.16b (The semiconductor cooling sheet 510 and the heat insulation board 520 are not shown in the figure), wherein;

[0331] by Fig.16a From the perspective of FIG. 5 , it can be observed that: the fan 530 is disposed in front of the radiator 540 ; and the temperature control circuit 10 is disposed on the upper side of the radiator 540 .

[0332] The left side and the right side of the radiator 540 are air inlets and outlets.

[0333] by Fig.16b It can be clearly observed from the viewing angle that the hot end of the semiconductor cooling plate 510 is arranged behind the heat sink 540; and the cold end of the semiconductor cooling plate 510 is arranged on the side with the largest surface area on the limiter 30.

[0334] It should be noted that setting the cold end of the semiconductor refrigeration plate 510 on the side with the largest surface area on the limiter 30 can ensure that the cold end of the semiconductor refrigeration plate 510 completely covers the limiter, thereby improving the ability of the semiconductor refrigeration plate 510 to cool the limiter.

[0335] In addition, the heat insulation plate 520 is arranged on the same side of the heat sink 540 as the hot end of the semiconductor cooling plate 510, so as to fill the gap on the limiter 30 that is not covered by the semiconductor cooling plate.

[0336] Preferably, the specific structure of the temperature limiter is as follows: Fig.17a and Fig.17b ,exist Fig.16a and Fig.16b On the basis of, it also includes: a switching power supply 50, a TR switch 60, a low noise power supply 70 and a low noise amplifier 80; wherein:

[0337] by Fig.17a It can be clearly observed from the viewing angle that the switching power supply 50 is disposed in front of the radiator 540 and is arranged side by side with the fan 530 .

[0338] by Fig.17bIt can be clearly observed from the perspective that the TR switch 60 , the low noise power supply 70 and the low noise amplifier 80 are all disposed behind the heat sink 540 and are randomly arranged with the limiter 30 .

[0339] The connection relationship among the switching power supply 50 , the TR switch 60 , the low noise power supply 70 and the low noise amplifier 80 and their respective functions are the same as those in the prior art and will not be described in detail here.

[0340] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A temperature control circuit, characterized in that: Applied to wind profile radar, the limiter in the wind profile radar is provided with a temperature control device; the temperature control circuit comprises: a temperature acquisition circuit, a logic operation circuit and a drive circuit; wherein: The temperature acquisition circuit is used to acquire and generate an ambient temperature signal according to the ambient temperature of the wind profiler radar, and at the same time, acquire and generate a limiter temperature signal according to the limiter temperature; The logic operation circuit is used to output a control signal to the drive circuit when the limiter temperature is greater than a target temperature, wherein the target temperature is the difference between the ambient temperature and a preset temperature difference; the preset temperature difference is greater than or equal to zero; The driving circuit is used to drive the temperature regulating device to work and cool the limiter when receiving the control signal; The logic operation circuit comprises: a third voltage divider circuit, a fifth voltage follower circuit, a second subtraction operation circuit, a third subtraction operation circuit and a first hysteresis comparison circuit; wherein: The third voltage-dividing circuit is used to receive and generate a preset divided voltage according to the power supply voltage; The fifth voltage follower circuit is used to generate and output a preset difference to the second subtraction circuit according to the preset voltage division; the preset difference is a voltage signal corresponding to the preset temperature difference; The second subtraction circuit is used for subtracting the preset difference from the received ambient temperature signal to generate and output a target temperature signal to the third subtraction circuit; The third subtraction circuit is used for subtracting the received limiter temperature signal from the target temperature signal to generate and output a first comparison signal to the first hysteresis comparison circuit; The first hysteresis comparison circuit is used for outputting the control signal to the driving circuit when the first comparison signal is less than zero.

2. The temperature control circuit according to claim 1, characterized in that: The logic operation circuit is replaced by: a fourth voltage divider circuit, a sixth voltage follower circuit, a second addition operation circuit, a fourth subtraction operation circuit and a second hysteresis comparison circuit; wherein: The fourth voltage-dividing circuit is used to receive and generate a preset divided voltage according to the power supply voltage; The sixth voltage follower circuit is used to generate and output a preset difference to the second adding circuit according to the preset voltage division; the preset difference is a voltage signal corresponding to the preset temperature difference; The second adding circuit is used for adding the preset difference value to the received limiter temperature signal, generating and outputting the limiter conversion temperature signal to the fourth subtracting circuit; The fourth subtraction circuit is used for subtracting the limiter conversion temperature signal from the received ambient temperature signal to generate and output a second comparison signal; The second hysteresis comparison circuit is used for outputting the control signal to the driving circuit when the second comparison signal is less than zero.

3. The temperature control circuit according to claim 1, characterized in that: The temperature acquisition circuit includes: a first temperature sensor, a second temperature sensor, a first transfer circuit and a second transfer circuit; wherein: The first temperature sensor is used to collect and generate the ambient temperature signal according to the ambient temperature, and output the ambient temperature signal to the logic operation circuit through the first transfer circuit; The second temperature sensor is used to collect and generate the limiter temperature signal according to the limiter temperature, and output the limiter temperature signal to the logic operation circuit through the second transfer circuit.

4. The temperature control circuit according to claim 1, characterized in that: The driving circuit comprises: a control circuit and a power supply circuit; wherein: The control circuit is used to turn on its own circuit and output a power supply signal to the power supply circuit when receiving the control signal; The power supply circuit is used to provide a power supply voltage to the temperature control device when receiving the power supply signal, so that the temperature control device works and the temperature of the limiter is reduced.

5. The temperature control circuit according to claim 1, characterized in that: Also includes: A DC transformer circuit; wherein: The DC transformer circuit is used to convert the received input voltage into the operating voltage required by the temperature acquisition circuit, the logic operation circuit and the drive circuit, and output the voltage.

6. A temperature control system, characterized in that: A limiter used in a wind profiler radar comprises: the temperature control circuit as claimed in claim 1.

7. A temperature regulating limiter, characterized in that: include: A limiter, a temperature control system as claimed in claim 6; wherein: The temperature control system is arranged on one side of the limiter.

8. The temperature regulating limiter according to claim 7, characterized in that: The limiter comprises: a first-stage diode branch, a second-stage diode branch, a third-stage diode branch, an input branch and an output branch; wherein: The first end of the first-stage diode branch, the first end of the second-stage diode branch, the first end of the third-stage diode branch, the output end of the input branch, and the input end of the output branch are all connected; The input end of the input branch serves as the input end of the limiter; the output end of the output branch serves as the output end of the limiter; The second end of the first-stage diode branch, the second end of the second-stage diode branch, and the second end of the third-stage diode branch are all connected, and the connection point is grounded; The third end of the first-stage diode branch, the third end of the second-stage diode branch and the third end of the third-stage diode branch are all connected, and the connection point is grounded.

9. The temperature regulating limiter according to claim 7, characterized in that: The limiter comprises: a first capacitor, a second capacitor, a first diode and a first inductor; wherein: One end of the first capacitor is used as the input end of the limiter; one end of the second capacitor is used as the output end of the limiter; The other end of the first capacitor and the anode of the first diode are connected, and one end of the first inductor and the other end of the second capacitor are all connected; The other end of the first diode is connected to the other end of the first inductor, and the connection point is grounded.

Images