Battery power supply circuit and power supply method for wireless temperature measuring device

Abstract

The application discloses a battery power supply circuit and a power supply method in a wireless temperature measuring device. The power supply circuit comprises a main power supply module, a time-increasing power supply module, and a detection comparison module. The main power supply module is used for power supply when the battery voltage is higher than a preset reference voltage value, and is a power supply branch of an equivalent controlled switch K1. The time-increasing power supply module is used for power supply when the battery voltage is lower than the preset reference voltage value, and is a power supply branch of a series connection of an equivalent controlled switch K2 and an oscillation boost submodule. The detection comparison module is used for detecting the battery voltage of the wireless temperature measuring device, comparing the battery voltage with the preset reference voltage value, and outputting two interlocked signals Q1 and Q2, which are used for driving the controlled switch K1 and the controlled switch K2, respectively. The application has the advantages of simple structure and improved power supply duration.

Description

Technical Field

[0001] This invention mainly relates to the field of power equipment technology, specifically to a battery power supply circuit and power supply method in a wireless temperature measurement device. Background Technology

[0002] Abnormal temperature changes are often a precursor to power system accidents, and wireless temperature measurement devices are widely used in power system monitoring systems. Battery-powered wireless temperature measurement devices account for a considerable proportion, so improving the working time of wireless temperature measurement devices is of great significance to the safe operation of power systems.

[0003] In the process of implementing the prior art, the patent applicant discovered that the operating voltage range of the subsequent circuit of the wireless temperature measuring device is 3 to 3.6V. When the power supply voltage of the battery drops below 3V, the subsequent circuit of the wireless temperature measuring device cannot work properly. Traditional battery-powered wireless temperature measuring devices have the problems of low battery utilization and short effective usage time.

[0004] like Figure 1 The diagram shows the battery discharge time of a traditional wireless temperature measurement device. In a traditional wireless temperature measurement device, the full-charge voltage of the power supply battery is 3.6V. The voltage of the power supply battery will gradually decrease during use. After the power supply time t1 is reached, that is, after the voltage drops to 3V, it will be insufficient to support the normal operation of the subsequent circuits of the wireless temperature measurement device, and the battery is not economical. Summary of the Invention

[0005] To address the technical problems existing in the prior art, this invention provides a battery power supply circuit and power supply method for a wireless temperature measurement device that has a simple structure and improves power supply duration.

[0006] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows:

[0007] A battery-powered circuit in a wireless temperature measurement device includes:

[0008] The main power supply module is used to supply power when the battery voltage in the wireless temperature measurement device is higher than the preset reference voltage value. It is a power supply branch of an equivalent controlled switch K1.

[0009] The time-increase power supply module is used to supply power when the battery voltage in the wireless temperature measurement device is lower than the preset reference voltage value. It is a power supply branch consisting of an equivalent controlled switch K2 connected in series with the oscillation boost submodule. The input terminal of the oscillation boost submodule is Zin, and the output terminal is Zout.

[0010] The detection and comparison module is used to detect the battery voltage of the wireless temperature measuring device, compare it with the preset reference voltage value, and output two interlocked signals Q1 and Q2 to drive the controlled switch K1 and the controlled switch K2 respectively.

[0011] One end of the main power supply module and one end of the time-increase power supply module are both connected to the signal input terminal of the detection and comparison module, and are connected to the positive terminal of the battery in the wireless temperature measurement device; the other end of the main power supply module is connected to the other end of the time-increase power supply module, and is connected to the subsequent circuit of the wireless temperature measurement device.

[0012] Preferably, the detection and comparison module includes a comparator, logic gate C1, and logic gate C2; ​​wherein logic gate C1 is a positive logic output and logic gate C2 is a negative logic output; the input port IN+ of the comparator is connected to the signal input port Sin, the input port IN- of the comparator is connected to the reference voltage signal port Vref, and the output port of the comparator is connected to the input terminals of logic gate C1 and logic gate C2.

[0013] Preferably, the detection and comparison module includes a comparator, logic gate C1, and logic gate C2; ​​wherein logic gate C1 has a negative logic output, and logic gate C2 has a positive logic output; the input port IN- of the comparator is connected to the signal input port Sin, and the input port IN+ of the comparator is connected to the reference voltage signal port Vref; the output port of the comparator is connected to the input terminals of logic gate C1 and logic gate C2.

[0014] Preferably, the oscillation boost submodule includes a transformer T1, a resistor R1, a transistor Q4, and a diode D1; one end of the primary side of the transformer T1 is connected to one end of the secondary side of the transformer T1, and this secondary side is the opposite-named terminal corresponding to one end of the primary side of the transformer T1, and is connected to the input port Zin; the other end of the primary side of the transformer T1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the base of the transistor Q4, the emitter of the transistor Q4 is connected to the power supply ground, the collector of the transistor Q4, the other end of the secondary side of the transformer T1, and the anode of the diode D1 are connected, and the cathode of the diode D1 is connected to the output port Zout.

[0015] Preferably, the controlled switch K1 is a transistor or a MOSFET.

[0016] Preferably, the controlled switch K2 is a transistor or a MOSFET.

[0017] The present invention also discloses a power supply method based on the battery power supply circuit of the wireless temperature measuring device as described above, comprising the steps of: a detection and comparison module detecting the battery voltage of the wireless temperature measuring device, comparing it with a preset reference voltage value, and outputting two interlocked signals Q1 and Q2 to drive the controlled switch K1 of the main power supply module and the controlled switch K2 of the time-increase power supply module respectively, thereby realizing the power supply of the main power supply module or the power supply of the time-increase power supply module.

[0018] Preferably, when the battery voltage of the wireless temperature measuring device is greater than the preset reference voltage value, the output signal Q1 drives the controlled switch K1 of the main power supply module to open, so as to realize the power supply of the main power supply module; when the battery voltage of the wireless temperature measuring device is less than the preset reference voltage value, the output signal Q2 drives the controlled switch K2 of the time-increase power supply module to open, so as to realize the power supply of the time-increase power supply module.

[0019] Compared with the prior art, the advantages of the present invention are as follows:

[0020] The battery power supply circuit and power supply method of the wireless temperature measurement device of the present invention incorporates an oscillation boost submodule within the time-increase power supply module, which can broaden the operating voltage range of the wireless temperature measurement device, greatly extend the battery power supply working time of the wireless temperature measurement device, and improve the economy of the wireless temperature measurement device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the battery discharge time of a traditional wireless temperature measurement device.

[0022] Figure 2 This is a topology diagram of the battery power supply circuit of the present invention in an embodiment.

[0023] Figure 3 This is a structural diagram of the detection and comparison module in an embodiment of the present invention.

[0024] Figure 4 This is a structural diagram of the detection and comparison module in another embodiment of the present invention.

[0025] Figure 5 This is a circuit schematic diagram of the oscillation boost submodule in an embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram illustrating the effect of increasing battery discharge time in this invention.

[0027] Figure 7 This is a diagram illustrating an embodiment of the battery power supply circuit of the present invention in a specific application. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 2 As shown, the battery power supply circuit in the wireless temperature measurement device provided in this embodiment of the invention is used to improve the battery power supply time in the wireless temperature measurement device, and its specific structure includes:

[0030] The main power supply module is used to supply power when the battery voltage in the wireless temperature measurement device is higher than the preset reference voltage value. It is a power supply branch of an equivalent controlled switch K1.

[0031] The time-increase power supply module is used to supply power when the battery voltage in the wireless temperature measurement device is lower than the preset reference voltage value. It is a power supply branch consisting of an equivalent controlled switch K2 connected in series with the oscillation boost submodule. The input terminal of the oscillation boost submodule is Zin, and the output terminal is Zout.

[0032] The detection and comparison module is used to detect the battery voltage of the wireless temperature measuring device, compare it with the preset reference voltage value, and output two interlocked signals Q1 and Q2 to drive the controlled switch K1 and the controlled switch K2 respectively.

[0033] One end of the main power supply module and one end of the time-increase power supply module are both connected to the signal input terminal of the detection and comparison module, and are also connected to the positive terminal of the battery in the wireless temperature measurement device; the other end of the main power supply module is connected to the other end of the time-increase power supply module, and is also connected to the subsequent circuit of the wireless temperature measurement device.

[0034] like Figure 3 As shown, the detection and comparison module includes a comparator, logic gate C1, and logic gate C2; ​​logic gate C1 is a positive logic output, and logic gate C2 is a negative logic output; the input port IN+ of the comparator is connected to the signal input port Sin, the input port IN- of the comparator is connected to the reference voltage signal port Vref, and the output port of the comparator is connected to the input terminals of logic gate C1 and logic gate C2.

[0035] like Figure 4 As shown, in another embodiment, the detection comparison module includes a comparator, logic gate C1, and logic gate C2. Logic gate C1 has a negative logic output, and logic gate C2 has a positive logic output. The input port IN- of the comparator is connected to the signal input port Sin, and the input port IN+ of the comparator is connected to the reference voltage signal port Vref. The output port of the comparator is connected to the input terminals of logic gate C1 and logic gate C2.

[0036] like Figure 5 As shown, the oscillation boost submodule includes a transformer T1, a resistor R1, a transistor Q4, and a diode D1. One end of the primary side of transformer T1 is connected to one end of the secondary side of transformer T1. This secondary side is the opposite-named terminal of the primary side of transformer T1 and is connected to the input port Zin. The other end of the primary side of transformer T1 is connected to one end of resistor R1. The other end of resistor R1 is connected to the base of transistor Q4. The emitter of transistor Q4 is connected to the power supply ground. The collector of transistor Q4, the other end of the secondary side of transformer T1, and the anode of diode D1 are connected. The cathode of diode D1 is connected to the output port Zout.

[0037] In one specific embodiment, the controlled switches K1 and K2 are transistors or MOSFETs.

[0038] This invention also proposes a power supply method based on the battery power supply circuit in the wireless temperature measurement device described above, comprising the following steps:

[0039] Set the controlled switch K1 to the main power supply module;

[0040] The controlled switch K2 and the oscillation boost submodule are connected in series with the time-increment power supply module;

[0041] The main power supply module and the time-increase power supply module are connected in parallel between the power supply battery and the subsequent circuit of the wireless temperature measurement device.

[0042] The detection and comparison module detects the battery voltage of the wireless temperature measuring device and compares it with a preset reference voltage value. It then outputs two interlocked signals, Q1 and Q2, which respectively drive the controlled switch K1 of the main power supply module and the controlled switch K2 of the time-increase power supply module, thereby enabling power supply to either the main power supply module or the time-increase power supply module. Specifically, when the battery voltage of the wireless temperature measuring device is greater than the preset reference voltage value, signal Q1 is output to open the controlled switch K1 of the main power supply module, thus enabling power supply to the main power supply module; when the battery voltage is less than the preset reference voltage value, signal Q2 is output to open the controlled switch K2 of the time-increase power supply module, thus enabling power supply to the time-increase power supply module.

[0043] Of course, in other embodiments, control signals can also be acquired in the first preset time interval t1 and the second preset time interval t2 respectively to supply power to the subsequent circuit of the wireless temperature measuring device; wherein, the first preset time interval t1 is the time interval from the full battery voltage to the minimum normal operating voltage (preset reference voltage value) of the subsequent circuit of the wireless temperature measuring device, and the second preset time interval t2 is the time interval from the minimum normal operating voltage of the subsequent circuit of the wireless temperature measuring device to the minimum normal operating voltage of the subsequent circuit of the wireless temperature measuring device that the oscillation boost submodule cannot guarantee; within the first preset time interval t1, the controlled switch K1 acts on the main power supply module to supply power to the subsequent circuit of the wireless temperature measuring device; within the second preset time interval t2, the controlled switch K2 acts on the time-increase power supply module to supply power to the subsequent circuit of the wireless temperature measuring device.

[0044] The total power supply time of the system is the sum of the first preset time interval t1 and the second preset time interval t2.

[0045] The battery power supply circuit and power supply method of the wireless temperature measurement device of the present invention incorporates an oscillation boost submodule within the time-increase power supply module, which can broaden the operating voltage range of the wireless temperature measurement device, greatly extend the battery power supply working time of the wireless temperature measurement device, and improve the economy of the wireless temperature measurement device.

[0046] like Figure 6The diagram illustrates the effect of this invention in increasing battery discharge time. This invention adds a time-extending power supply module. After the battery usage time in the wireless temperature measurement device reaches t1, the system switches to the time-extending power supply module to continue supplying power. Because the oscillating boost submodule can increase the voltage supplied by the battery to the subsequent circuits of the wireless temperature measurement device, the subsequent circuits can continue to operate normally even when the battery voltage is lower than a preset reference voltage value, until after time t2, when the boosted battery voltage can no longer support the normal operation of the subsequent circuits. Compared to the power supply time t1 of a traditional power supply circuit, the power supply circuit provided by this invention can extend the battery power supply time to t1+t2, greatly increasing the working time of the wireless temperature measurement device.

[0047] like Figure 7 The image shows a specific embodiment of the present invention for improving the battery life of a wireless temperature measurement device, combined with... Figure 6 The detection and comparison module provides a preset reference voltage Vref of 3V, which is compared with the voltage of the power supply battery to generate control signals Q1 and Q2 to control transistors G1 and G2.

[0048] When the battery voltage is between 3.6 and 3V, the control signal Q1 outputs a low level, turning on transistor G1; the control signal Q2 outputs a high level, turning off transistor G2; and the main power supply module supplies power to the subsequent circuits of the wireless temperature measurement device for a time of t1.

[0049] When the battery voltage is between 3 and 1V, the control signal Q1 outputs a high level, turning off transistor G1, and the control signal Q2 outputs a low level, turning on transistor G2, and supplying power to the subsequent circuit of the wireless temperature measuring device through the time-incrementing power supply module. The power supply time is t2.

[0050] The total power supply duration is t1+t2, which greatly increases the working time of the wireless temperature measurement device.

[0051] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A battery-powered circuit in a wireless temperature measurement device, characterized in that, include: The main power supply module is used to supply power when the battery voltage in the wireless temperature measurement device is higher than the preset reference voltage value. It is a power supply branch of an equivalent controlled switch K1. The time-increase power supply module is used to supply power when the battery voltage in the wireless temperature measurement device is lower than the preset reference voltage value. It is a power supply branch consisting of an equivalent controlled switch K2 connected in series with the oscillation boost submodule. The input terminal of the oscillation boost submodule is Zin, and the output terminal is Zout. The detection and comparison module is used to detect the battery voltage of the wireless temperature measuring device, compare it with the preset reference voltage value, and output two interlocked signals Q1 and Q2 to drive the controlled switch K1 and the controlled switch K2 respectively. One end of the main power supply module and one end of the time-increase power supply module are both connected to the signal input terminal of the detection and comparison module, and are connected to the positive terminal of the battery in the wireless temperature measurement device; the other end of the main power supply module is connected to the other end of the time-increase power supply module, and is connected to the subsequent circuit of the wireless temperature measurement device. The oscillation boost submodule includes a transformer T1, a resistor R1, a transistor Q4, and a diode D1. One end of the primary side of the transformer T1 is connected to one end of the secondary side of the transformer T1. This secondary side is the opposite-named terminal of the primary side of the transformer T1 and is connected to the input port Zin. The other end of the primary side of the transformer T1 is connected to one end of the resistor R1. The other end of the resistor R1 is connected to the base of the transistor Q4. The emitter of the transistor Q4 is connected to the power supply ground. The collector of the transistor Q4, the other end of the secondary side of the transformer T1, and the anode of the diode D1 are connected. The cathode of the diode D1 is connected to the output port Zout.

2. The battery-powered circuit in the wireless temperature measurement device according to claim 1, characterized in that, The detection and comparison module includes a comparator, logic gate C1, and logic gate C2; ​​wherein logic gate C1 is a positive logic output and logic gate C2 is a negative logic output; the input port IN+ of the comparator is connected to the signal input port Sin, the input port IN- of the comparator is connected to the reference voltage signal port Vref, and the output port of the comparator is connected to the input terminals of logic gate C1 and logic gate C2.

3. The battery-powered circuit in the wireless temperature measurement device according to claim 1, characterized in that, The detection and comparison module includes a comparator, logic gate C1, and logic gate C2; ​​wherein logic gate C1 has a negative logic output and logic gate C2 has a positive logic output; the input port IN- of the comparator is connected to the signal input port Sin, and the input port IN+ of the comparator is connected to the reference voltage signal port Vref; the output port of the comparator is connected to the input terminals of logic gate C1 and logic gate C2.

4. The battery-powered circuit in the wireless temperature measurement device according to claim 1, 2, or 3, characterized in that, The controlled switch K1 is a transistor or MOSFET.

5. The battery-powered circuit in the wireless temperature measurement device according to claim 1, 2, or 3, characterized in that, The controlled switch K2 is a transistor or MOSFET.

6. A power supply method for the battery-powered circuit in the wireless temperature measurement device according to any one of claims 1-5, characterized in that, The process includes the following steps: The detection and comparison module detects the battery voltage of the wireless temperature measuring device and compares it with a preset reference voltage value. Then, it outputs two interlocked signals Q1 and Q2, which drive the controlled switch K1 of the main power supply module and the controlled switch K2 of the time-increase power supply module, respectively, thereby enabling the main power supply module to supply power or the time-increase power supply module to supply power.

7. The power supply method according to claim 6, characterized in that, When the battery voltage of the wireless temperature measuring device is greater than the preset reference voltage value, the output signal Q1 drives the controlled switch K1 of the main power supply module to open, so as to realize the power supply of the main power supply module. When the battery voltage of the wireless temperature measuring device is lower than the preset reference voltage value, the output signal Q2 drives the controlled switch K2 of the time-increase power supply module to open, so as to realize the power supply of the time-increase power supply module.

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