CN215064661U - Temperature and humidity recorder - Google Patents
Temperature and humidity recorder Download PDFInfo
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- CN215064661U CN215064661U CN202121382611.9U CN202121382611U CN215064661U CN 215064661 U CN215064661 U CN 215064661U CN 202121382611 U CN202121382611 U CN 202121382611U CN 215064661 U CN215064661 U CN 215064661U
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Abstract
The utility model discloses a humiture record appearance, this humiture record appearance is including being equipped with the IO interface, the crystal oscillator interface, the integrated chip of power source and antenna interface, and the first crystal oscillator circuit with each interface connection of integrated chip, the second crystal oscillator circuit, temperature and humidity sensor circuit and power supply circuit, and the charging circuit with power supply circuit parallel connection, charge to the energy storage device in the power supply circuit through charging circuit, make humiture record appearance both can realize work through the power supply circuit power supply of itself, also can charge to the energy storage device in the power supply circuit through charging circuit, the used repeatedly of humiture record appearance has been realized, compare prior art, the use of the humiture record appearance that this application provided is more convenient, the diversification of power supply has been realized.
Description
Technical Field
The utility model relates to a temperature and humidity measurement technical field, in particular to humiture record appearance.
Background
Humiture record appearance includes main control chip, data acquisition circuit and power supply circuit usually, and power supply circuit adopts the circuit of steady voltage chip design, and steady voltage chip mainly is used for guaranteeing to export stable voltage, of course also exist among the prior art and adjust the output of voltage current through designing extra auxiliary circuit, but temperature and humidity sensor's that just so greatly increased circuit complexity, and the design of the ultra-thinization of being convenient for, simultaneously also not very good to the effect of current stability control, especially the power supply mode to the direct current, its adjustment effect is not good, the event needs to improve urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a humiture record appearance aims at solving the single technical problem of current humiture record appearance power supply mode.
In order to achieve the above object, the temperature and humidity recorder provided by the present invention comprises an integrated chip having four groups of I/O interfaces, a group of crystal oscillator interfaces, a plurality of groups of power interfaces, and an antenna interface; the first crystal oscillator circuit is connected with the crystal oscillator interface and is used for controlling the work of the integrated chip; the temperature and humidity sensor circuit and the second crystal oscillator circuit are respectively connected with the four groups of I/O interfaces, and the temperature and humidity sensor circuit and the second crystal oscillator circuit are not connected with the same group of I/O interfaces; the power supply circuit is connected with a plurality of groups of power supply interfaces of the integrated chip and comprises an energy storage device and a power supply circuit, the power supply circuit is provided with at least three groups of power supply interfaces, the energy storage device is connected with the power supply circuit, and working voltages with different voltage values are provided for the integrated chip through the at least three groups of power supply interfaces; and the charging circuit is connected with the energy storage device in parallel and is used for charging the energy storage device.
The utility model discloses an embodiment, charging circuit is including the charging chip, auxiliary device and the USB interface that are equipped with 5 pins, the second of charging chip is connected the foot and is connected the foot with the negative pole and the positive pole of USB interface respectively with the fourth, the auxiliary device with the fifth of charging chip is connected the back, again with the positive pole and the negative pole of USB interface are connected.
The utility model discloses an in the embodiment, charging circuit still includes the display circuit, the one end of display circuit with charging chip's first connecting pin is connected, the other end of display circuit with the positive pole of USB interface is connected.
In an embodiment of the present invention, the power supply circuit includes a digital circuit power supply circuit, an analog circuit power supply circuit, and a memory circuit power supply circuit; one end of the digital circuit power circuit, one end of the analog circuit power circuit and one end of the memory circuit power circuit are connected with the ground, the other end of the digital circuit power circuit is connected with the digital circuit interfaces in the multiple groups of power interfaces, the other end of the analog circuit power circuit is connected with the analog circuit interfaces in the multiple groups of power interfaces, and the other end of the memory circuit power circuit is connected with the memory circuit interfaces in the multiple groups of power interfaces.
In an embodiment of the invention, the power circuit further comprises a power supply hysteresis control circuit, which is connected in parallel with the energy storage device.
In an embodiment of the present invention, the power supply hysteresis control circuit is composed of at least two capacitors connected in parallel.
In an embodiment of the present invention, the temperature and humidity recorder further includes a low temperature protection circuit connected in parallel to the energy storage device; if the temperature and humidity recorder is in a dormant state, the energy storage device charges the low-temperature protection circuit; and if the temperature and humidity recorder is in an awakening state, the low-temperature protection circuit discharges electricity and provides working current for the temperature and humidity recorder together with the energy storage device.
The utility model discloses an embodiment, low temperature protection circuit include button cell and respectively with button cell parallel connection's two at least electric capacities, at least two electric capacity with energy storage device parallel connection.
The utility model discloses an in the embodiment, the humiture record appearance still includes auxiliary circuit, auxiliary circuit includes: the activation circuit is connected with the I/O interface and is used for controlling the temperature and humidity recorder to be switched from a dormant state to an awakening state; and an indication circuit connected to the I/O interface.
The utility model discloses an embodiment, the humiture record appearance still include with IO interface connection's data storage circuit, be used for the storage the humiture data that the humiture sensor circuit was gathered.
The utility model discloses humiture record appearance among the technical scheme is including being equipped with the IO interface, the crystal oscillator interface, the integrated chip of power source and antenna interface, and with each interface connection's of integrated chip first crystal oscillator circuit, the second crystal oscillator circuit, temperature and humidity sensor circuit and power supply circuit, and with power supply circuit parallel connection's charging circuit, charge to the energy storage device in the power supply circuit through charging circuit, make humiture record appearance both can realize work through the power supply circuit power supply of itself, also can charge to the energy storage device in the power supply circuit through charging circuit, the used repeatedly of humiture record appearance has been realized, the single problem of current humiture record appearance power supply mode has been solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of a first embodiment of a moderate temperature humidity recorder according to the present invention;
fig. 2 is a schematic structural diagram of a charging circuit according to the present invention;
fig. 3 is a schematic structural diagram of a power supply circuit according to the present invention;
fig. 4 is a schematic structural diagram of the middle and low temperature protection circuit of the present invention;
fig. 5 is a schematic structural diagram of the middle temperature humidity sensor circuit of the present invention;
FIG. 6 is a schematic structural view of a second embodiment of the moderate temperature humidity recorder of the present invention
Fig. 7 is a schematic structural diagram of a data storage circuit according to the present invention;
fig. 8 is a schematic structural diagram of the antenna circuit according to the present invention;
fig. 9 is a schematic circuit diagram of the ic and the antenna circuit according to the present invention;
fig. 10 is a schematic circuit diagram of a first crystal oscillator circuit according to the present invention;
fig. 11 is a schematic circuit diagram of a second crystal oscillator circuit according to the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a humiture record appearance please refer to fig. 1, and this humiture record appearance includes:
the integrated chip 10 is provided with an I/O interface 101, a crystal oscillator interface 102, a power interface 103 and an antenna interface 104;
the first crystal oscillator circuit 20 is connected with the crystal oscillator interface 102 and is used for controlling the operation of the integrated chip 10;
the temperature and humidity sensor circuit 30 and the second crystal oscillator circuit 40 are respectively connected with the four groups of I/O interfaces 101, and the temperature and humidity sensor circuit 30 and the second crystal oscillator circuit 40 are not connected with the same group of I/O interfaces 101, that is, the temperature and humidity sensor circuit 30 and the second crystal oscillator circuit 40 are arranged on different groups of I/O interfaces;
the power supply circuit 50 is connected with the plurality of groups of power interfaces 103 of the integrated chip 10, the power supply circuit 50 comprises an energy storage device 501 and a power supply circuit 502, the power supply circuit 502 is provided with at least three groups of power supply interfaces 5021, the energy storage device 501 is connected with the power supply circuit 502, and working voltages with different voltage values are provided for the integrated chip 10 through the at least three groups of power supply interfaces 5021;
and a charging circuit 60 connected in parallel with the energy storage device 501 for charging the energy storage device 501.
In this embodiment, a serial communication circuit is provided between the temperature and humidity sensor circuit 30 and the integrated chip 10, and when the temperature and humidity sensor 30 collects temperature and humidity data or triggers reading of the temperature and humidity data, the temperature and humidity sensor 30 feeds back the data through the serial communication circuit. In practical applications, the power supply circuit 502 is connected to the integrated chip 10, the first crystal oscillator circuit 20, the temperature and humidity sensor circuit 30, and the second crystal oscillator circuit 40 respectively, and is configured to pass through the operating voltage.
In this embodiment, the integrated chip 10 is provided with a plurality of groups of interfaces with different functions, specifically, four groups of I/O interfaces 101 (a first I/O interface, a second I/O interface, a third I/O interface, and a fourth I/O interface, respectively), one group of crystal oscillator interface 102, at least three groups of power interfaces 103, one group of antenna interfaces 104, and other function control interfaces, and in practical application, the temperature and humidity recorder further includes an antenna circuit, which is connected to the antenna interface 104, and is configured to receive a trigger signal sent by an external device through bluetooth or NFC, and send temperature and humidity data collected by the temperature and humidity sensor circuit 30 to the external device;
the utility model discloses in some embodiments, this humiture record appearance still includes auxiliary circuit, and this auxiliary circuit is connected with other function control interface electricity for provide required auxiliary signal for integrated chip 10's work, this auxiliary circuit specifically is including the indicating circuit who instructs the different states of humiture record appearance, and is used for controlling the activation circuit of the operating condition's of humiture record appearance switching.
In practical application, the temperature and humidity sensor circuit 30 is connected to a first group of I/O interfaces of the four groups of I/O interfaces 101, and is configured to collect temperature and humidity data of an environment where the temperature and humidity recorder is located, and return the temperature and humidity data to the integrated chip 10 through the first group of I/O interfaces;
the second crystal oscillator circuit 40 is connected to the second group of I/O interfaces, and is configured to provide pulse signals for the temperature and humidity recorder in different operating states.
As shown in fig. 2, the charging circuit 60 includes a charging chip U9 with 5 pins, an auxiliary device (i.e., C27 and R15 in the figure), and a USB interface (not shown in the figure), where the USB interface is specifically an interface composed of +5V and ground in the figure, in practical applications, the charging chip U9 is a semiconductor chip with model LTC4054ES5-4.2, and includes 5 connection pins, the second connection pin and the fourth connection pin of the charging chip U9 are respectively connected to the negative electrode and the positive electrode of the USB interface, the USB interface is an interface device with a common specification, the positive electrode and the negative electrode of the USB interface are generally two pins at the edge of the USB interface, and the auxiliary device is connected to the fifth connection pin of the charging chip and then connected to the positive electrode and the negative electrode of the USB interface.
Further, the charging circuit 60 further includes a display circuit, one end of the display circuit is connected to the first connection pin of the charging chip U9, and the other end of the display circuit is connected to the positive electrode of the USB interface.
In this embodiment, the power supply circuit 502 includes at least three sets of power supply interfaces, where the at least three sets of power supply interfaces are respectively connected to the plurality of sets of power supply interfaces, and the at least three sets of power supply interfaces respectively output working voltages with different voltage values;
the at least three groups of power supply interfaces are power supply interfaces for supplying power to different types of integrated circuits in the integrated chip 10, for example: the power supply interface of 1V, the power supply interface of 1.3V and the power supply interface of 1.8V, specifically VDD _1V, 1V2 and VDD _ F in fig. 3, and further includes a total power supply interface + BATT.
Specifically, the power supply circuit 502 includes a digital circuit power supply circuit (i.e., a partial circuit corresponding to VDD _ 1V), an analog circuit power supply circuit (i.e., a partial circuit corresponding to 1V 2), a memory circuit power supply circuit (i.e., a partial circuit corresponding to VDD _ F), and the energy storage device 501 (i.e., a partial circuit corresponding to + BATT connection);
one end of the digital circuit power supply circuit, one end of the analog circuit power supply circuit and one end of the memory circuit power supply circuit are connected with the ground, the other end of the digital circuit power supply circuit, the analog circuit power supply circuit and the other end of the memory circuit power supply circuit are sequentially connected with the digital circuit interfaces, the analog circuit interfaces, the storage circuit interfaces and the external power supply interfaces in the multiple groups of power supply interfaces 103, namely, the other end of the digital circuit power supply circuit is connected with the digital circuit interfaces in the multiple groups of power supply interfaces, the other end of the analog circuit power supply circuit is connected with the analog circuit interfaces in the multiple groups of power supply interfaces, and the other end of the memory circuit power supply circuit is connected with the storage circuit interfaces in the multiple groups of power supply interfaces.
In practical applications, the digital circuit power supply circuit, the analog circuit power supply circuit, the memory circuit power supply circuit and the energy storage device 501 are output terminals labeled as VDD _1V, 1V2, VDD _ F and + BATT in fig. 3, respectively.
In this embodiment, all the power circuits described above are implemented by using capacitors with different numbers in parallel, where the digital circuit power circuit and the memory power circuit respectively implement stable power output by a capacitor of 1uF and a capacitor of 10uF, VDD _1V provides power for the digital circuit inside the chip, and is generated by the built-in LDO, and the value: 1V and VDD _ F provide power for Flash inside the chip, and are generated inside the chip and have the values: 1.8V.
The analog circuit power supply circuit and the total power supply circuit are respectively realized by connecting four capacitors with different capacities and three capacitors with the same capacity in parallel, 1V2 provides power for the analog circuit in the chip, and the power is generated by a built-in DCDC (direct current DC) and has the value: 1.3V and + BATT provides 1.8-3.6V power for the whole chip.
In this embodiment, the power supply circuit 50 further includes a power supply hysteresis control circuit connected in parallel with the overall power supply circuit, the power supply hysteresis control circuit being composed of at least two capacitors connected in parallel. As shown in fig. 3, the circuit formed by two capacitors in a dashed line frame has two capacitors of 100uF connected in parallel and then connected in parallel to the energy storage device 501. The power supply delay control circuit mainly has the function of weakening the delay effect of the power supply of the energy storage device 501, and particularly when a battery is used as a main power supply, the temperature and humidity recorder can normally work within the working temperature range of-30-70 ℃, and the service life is prolonged.
In this embodiment, as shown in fig. 6, the humiture recorder further includes a low-temperature protection circuit 70, the humiture recorder can have a difference to the work control of the low-temperature protection circuit 70 in the sleep and wake-up states, the low-temperature protection circuit 70 is connected in parallel with the energy storage device 501, under a low-temperature environment, the internal resistance of the energy storage device 501 can become very large, which causes the output voltage of the power circuit 50 to become low, the working current is small, and the working requirement of the humiture recorder cannot be met, but the small current can charge the energy storage device 501 in the power circuit 50, and the low-temperature protection circuit 70 can discharge instantly after the recorder wakes up, so as to provide the current meeting the working requirement of the recorder.
Based on the above situation, when the integrated chip 10 outputs the start signal, the low temperature protection circuit 70 operates simultaneously with the power supply circuit 50 to supply a large instantaneous current to the integrated chip 10.
In practical applications, as shown in fig. 4, the low-temperature protection circuit 70 includes a button cell and at least two capacitors respectively connected in parallel with the button cell, and the at least two capacitors are connected in parallel with the energy storage device 501.
The utility model discloses an in an embodiment, this low temperature protection circuit 70 can also set up to the circuit of heating function, can keep power supply circuit 50 to work under certain temperature environment in real time through the heating, certainly also can heat power supply circuit 50 in the short time that the record appearance awakens up, in practical application, low temperature protection circuit 70 includes heating circuit and with heating circuit series connection's control switch, its and energy storage device 501's positive pole and negative pole lug connection, when integrated chip 10 output start signal, closed control switch, the work of switch-on heating circuit.
In this embodiment, the circuits are uniformly distributed on the PCB, and the fixed installation of the circuits is realized by fixing the PCB on the housing, in practical application, the housing includes a first housing and a second housing;
the first shell is provided with a mounting cavity which is adapted to a PCB (printed circuit board) for bearing the integrated chip 10, the antenna circuit, the temperature and humidity acquisition circuit 30 and the serial port communication circuit;
the second shell is provided with a matching cavity matched with the mounting cavity;
the PCB is fixed in a cavity formed when the installation cavity and the matching cavity are closed in an interference fit installation mode.
In practical application, the housing may be a plastic housing or a metal housing, and the housing is provided with a battery cavity, which may be configured adaptively according to the type of the battery, for example, the battery is a button-type battery, and the battery cavity may be correspondingly configured to be cylindrical; or the battery adopts a square lithium battery, and the battery cavity can be correspondingly set into a square cavity. The battery cavity is provided with a mounting port (not marked) for installing a battery, and the battery is arranged on the shell through the mounting port and is connected with the circuits to provide corresponding voltage so as to provide working energy.
In this embodiment, please refer to fig. 5, in order to enable the temperature and humidity recorder to more accurately and precisely collect temperature and humidity data in an environment where the temperature and humidity recorder is located, the temperature and humidity collecting circuit 30 is configured as the following structure, the temperature and humidity collecting circuit 30 includes three resistors (respectively, R6, R5, and R4 in the figure), two capacitors (respectively, C22, C23 in the figure), and a temperature and humidity sensor chip (e.g., U2 in the figure), in practical application, the temperature and humidity sensor chip is implemented by using a sensor of the type STH30, the temperature and humidity sensor chip includes 7 pins, a first pin and a sixth pin of the temperature and humidity sensor chip are sequentially connected to a first data pin and a first control pin (i.e., pins corresponding to two tags, SCL and SDA in fig. 9) in the integrated chip 10, after the temperature and humidity sensor chip detects the temperature and humidity data in the environment, and the connecting line of the first pin and the sixth pin is transmitted to the integrated chip, and the second pin and the fourth pin of the temperature and humidity sensor chip are grounded.
In this embodiment, the first connection ends of the three resistors R6, R5, and R4 are connected to each other and then connected to the data acquisition pin (i.e., the TMPVCC pin) of the integrated chip, the second connection ends of the three resistors R4, R6, and R5 are sequentially connected to the first pin, the third pin, and the sixth pin of the temperature and humidity sensor chip, and the fifth pin of the temperature and humidity sensor chip is shorted to the first connection ends of the three resistors.
In this embodiment, the two capacitors C22 and C23 are connected in parallel, the two pins after the parallel connection are respectively connected with the first connection end of the resistor and the ground, that is, the first connection ends of the two capacitors C22 and C23 are connected with the first connection end of the resistor, and the second connection end after the parallel connection of the two capacitors is connected with the fourth pin of the temperature and humidity sensor chip and is grounded at the same time.
The utility model discloses an in an embodiment, this humiture acquisition circuit 30 still includes the temperature sensor chip, this temperature sensor chip is equipped with 6 pins, the first pin and the sixth pin of temperature sensor chip in proper order with the second data pin and the second control pin in the integrated chip are connected, in practical application, the I/O interface in the second data pin and the second control pin specifically select the integrated chip realizes like arbitrary two in the PB interface in fig. 9, the second pin ground connection of this temperature sensor chip, other pins are the same with the relation of connection of above-mentioned three resistor R6, R5 and R4 and two condenser C22 and C23 and temperature sensor chip, no longer repeated here one by one, it is preferred, the sensor that the model is TMP112/102 is selected to the humiture sensor chip.
The utility model discloses an embodiment, this humiture record appearance can also communicate with external equipment, humiture data transmission to the target terminal with gathering, as shown in FIG. 8, realize through antenna circuit 80, this antenna circuit 80 includes two at least LC filter circuit, first resistance R17 and antenna U6, in practical application, select a LC filter circuit design, LC filter circuit includes series connection's first inductance L2 and first electric capacity C1 in proper order, serve with one that first electric capacity C1 is connected in first inductance L2 and be equipped with first input A, serve with first electric capacity C1 one of not being connected in first inductance L2 and be equipped with second input B and second electric capacity C5, second electric capacity C5 is connected with ground. The first input terminal a and the second input terminal B are respectively connected to an antenna pin in the integrated chip 10.
In practical applications, the antenna circuit 80 is specifically an antenna circuit 80 triggered by bluetooth, that is, the antenna circuit 80 is matched with a bluetooth function in a near field communication function in the integrated chip 10, specifically, the antenna circuit 80 includes an LC filter circuit, an impedance matching circuit and a coupling capacitor, one end of the impedance matching circuit is connected with one end of the coupling capacitor, the other end of the coupling capacitor is connected with one end of the LC filter circuit, and the other end of the impedance matching circuit is connected with the first resistor R17.
As shown in fig. 9, the impedance matching circuit is a Π -type circuit, and includes a third capacitor C3, a second inductor L1, and a fourth capacitor C4 connected in series; one end of the third capacitor C3 connected with the second inductor L1 is connected with the coupling capacitor C2, and the other end of the third capacitor C3 is grounded; one end of the fourth capacitor C4 connected to the second inductor L1 is connected to the first resistor R17, and the other end of the fourth capacitor C4 is grounded.
The temperature and humidity data are transmitted through the antenna circuit 80, and since the first inductor L2 and the first capacitor C1 form an LC filter circuit, a high-frequency part in the VANT is filtered out, and a pure power supply is obtained for the antenna; c2 is a coupling capacitor, isolates the direct current power supply, and couples the modulation signal of the ANT to the pi-shaped circuit; the second inductor L1, the third capacitor C3 and the fourth capacitor C4 form an n-shaped circuit, so that impedance matching is realized, the maximum power transmission is realized, and the index of the antenna reaches the best state; the first resistor R17 is mainly used as a test point of the antenna matching circuit, and is convenient for accessing an instrument for testing.
The utility model discloses an embodiment, as shown in FIG. 6, the humiture recorder still includes auxiliary circuit 90, and auxiliary circuit 90 sets up and is connected at integrated chip 10 periphery and with integrated chip 10, and when the circular telegram of humiture recorder, auxiliary circuit output control signal control integrated chip work.
The auxiliary circuit 90 includes a data export interface circuit and a reset circuit respectively connected to the integrated chip 10, where the data export interface circuit is specifically a circuit of near field communication such as a USB interface circuit and a bluetooth circuit.
In this embodiment, the auxiliary circuit 90 further includes an activation circuit connected to the third group of I/O interfaces, and configured to control the temperature and humidity recorder to switch from the sleep state to the wake-up state; and the indicating circuit is connected with the fourth I/O interface in the plurality of groups of I/O interfaces.
As shown in fig. 9, the integrated chip 10 uses a semiconductor silicon wafer with model number TLSR8251F512ET48, and the auxiliary circuit includes a third inductor L3 and a fifth capacitor C12, wherein the third inductor L3 is connected in parallel to the VDCDC _ SW pin and the VDCDC pin in the integrated chip, the fifth capacitor C12 is connected to the reset pin and simultaneously connected to the reset circuit, and the third inductor L3 is used as a power inductor and is an energy storage element of the DCDC circuit on the VDCDC pin in the integrated chip 10.
In this embodiment, because this humiture recording instrument is provided with two operating modes, consequently, first and second crystal oscillator circuit, one is used for controlling integrated chip 10, is the work of control humiture recording instrument promptly, and one then is used for controlling the operating mode of humiture recording instrument, is dormancy or awakens up two kinds of states promptly. Specifically, as shown in fig. 10 and 11, the first crystal oscillator circuit 20 and the second crystal oscillator circuit 40 are connected, the first crystal oscillator circuit 10 is connected to the crystal oscillator interface, and the second crystal oscillator circuit 40 is connected to the second group I/O interface.
In this embodiment, the humiture recorder further includes a test interface circuit and a burning interface circuit, specifically, the setting of the test interface circuit is realized by extending a pin header or a USB interface in two pins, namely TX pin and RX pin, in the integrated chip, and similarly, the pin header or the USB interface is also extended by extending a pin header or a USB interface in two pins, namely RST pin and SWS pin, in the integrated chip, and the pin header or the USB interface is also connected to the positive electrode and the negative electrode of the power supply, so as to realize the setting of the burning interface circuit.
In this embodiment, the temperature and humidity recorder further includes a data storage circuit 100 connected to the plurality of groups of I/O interfaces, and configured to store temperature and humidity data collected by the temperature and humidity sensor circuit. As shown in fig. 6 and 7, the data storage circuit 100 includes a memory chip U4, two capacitors (e.g., C20 and C21 in the figure) with different capacities, and a resistor R9, wherein one end of the resistor is connected to the first pin of the memory chip U4, the other end of the resistor is connected to the seventh and eighth pins of the memory chip U4, and the other end of the resistor is connected to the main power interface of the power supply circuit 50; after the two capacitors C20 and C21 are connected in parallel, one end is connected to the seventh and eighth pins of the memory chip U4, and the other end is grounded. The first, second, fifth and sixth pins of the memory chip U4 are connected to the integrated chip 10.
Through the implementation of the humiture recorder provided by the above, the energy storage device in the power supply circuit is charged through the charging circuit, so that the humiture recorder can realize work by supplying power to the power supply circuit of the humiture recorder, and also can charge the energy storage device in the power supply circuit through the charging circuit, thereby realizing the repeated use of the humiture recorder and solving the problem of single power supply mode of the existing humiture recorder.
The above is only the preferred embodiment of the present invention, and the patent scope of the present invention is not limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. The utility model provides a humiture record appearance, its characterized in that, humiture record appearance includes:
the integrated chip is provided with four groups of I/O interfaces, a group of crystal oscillator interfaces, a plurality of groups of power interfaces and antenna interfaces;
the first crystal oscillator circuit is connected with the crystal oscillator interface and is used for controlling the work of the integrated chip;
the temperature and humidity sensor circuit and the second crystal oscillator circuit are respectively connected with the four groups of I/O interfaces, and the temperature and humidity sensor circuit and the second crystal oscillator circuit are not connected with the same group of I/O interfaces;
the power supply circuit is connected with a plurality of groups of power supply interfaces of the integrated chip and comprises an energy storage device and a power supply circuit, the power supply circuit is provided with at least three groups of power supply interfaces, the energy storage device is connected with the power supply circuit, and working voltages with different voltage values are provided for the integrated chip through the at least three groups of power supply interfaces;
and the charging circuit is connected with the energy storage device in parallel and is used for charging the energy storage device.
2. The humiture recorder according to claim 1, wherein the charging circuit comprises a charging chip with 5 pins, an auxiliary device and a USB interface, the second connection pin and the fourth connection pin of the charging chip are respectively connected with the negative electrode and the positive electrode of the USB interface, and the auxiliary device is connected with the positive electrode and the negative electrode of the USB interface after being connected with the fifth connection pin of the charging chip.
3. The humiture recorder according to claim 2, wherein the charging circuit further comprises a display circuit, one end of the display circuit is connected to the first connection pin of the charging chip, and the other end of the display circuit is connected to the positive electrode of the USB interface.
4. The humiture recorder according to claim 1, wherein said power supply circuit includes a digital circuit power supply circuit, an analog circuit power supply circuit and a memory circuit power supply circuit;
one end of the digital circuit power circuit, one end of the analog circuit power circuit and one end of the memory circuit power circuit are connected with the ground, the other end of the digital circuit power circuit is connected with the digital circuit interfaces in the multiple groups of power interfaces, the other end of the analog circuit power circuit is connected with the analog circuit interfaces in the multiple groups of power interfaces, and the other end of the memory circuit power circuit is connected with the memory circuit interfaces in the multiple groups of power interfaces.
5. The humiture recorder according to any one of claims 1-4, wherein the power circuit further comprises a power supply hysteresis control circuit connected in parallel with the energy storage device.
6. The temperature and humidity recorder according to claim 5, wherein the power supply delay control circuit comprises at least two capacitors connected in parallel.
7. The temperature and humidity recorder according to claim 5, further comprising a low temperature protection circuit connected in parallel with the energy storage device;
if the temperature and humidity recorder is in a dormant state, the energy storage device charges the low-temperature protection circuit;
and if the temperature and humidity recorder is in an awakening state, the low-temperature protection circuit discharges electricity and provides working current for the temperature and humidity recorder together with the energy storage device.
8. The temperature and humidity recorder according to claim 7, wherein the low temperature protection circuit comprises a button cell and at least two capacitors respectively connected in parallel with the button cell, and at least two of the capacitors are connected in parallel with the energy storage device.
9. The humiture recorder according to claim 5, wherein the humiture recorder further comprises an auxiliary circuit, the auxiliary circuit comprising: the activation circuit is connected with the I/O interface and is used for controlling the temperature and humidity recorder to be switched from a dormant state to an awakening state; and an indication circuit connected to the I/O interface.
10. The temperature and humidity recorder of claim 9, further comprising a data storage circuit connected to the I/O interface for storing temperature and humidity data collected by the temperature and humidity sensor circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121382611.9U CN215064661U (en) | 2021-06-21 | 2021-06-21 | Temperature and humidity recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121382611.9U CN215064661U (en) | 2021-06-21 | 2021-06-21 | Temperature and humidity recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215064661U true CN215064661U (en) | 2021-12-07 |
Family
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| CN202121382611.9U Active CN215064661U (en) | 2021-06-21 | 2021-06-21 | Temperature and humidity recorder |
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| CN (1) | CN215064661U (en) |
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2021
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