CN217465853U - Temperature and humidity recorder - Google Patents
Temperature and humidity recorder Download PDFInfo
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- CN217465853U CN217465853U CN202221308937.1U CN202221308937U CN217465853U CN 217465853 U CN217465853 U CN 217465853U CN 202221308937 U CN202221308937 U CN 202221308937U CN 217465853 U CN217465853 U CN 217465853U
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Abstract
The utility model discloses a temperature and humidity recorder, which at least comprises a first acquisition circuit, an external interface circuit used for connecting an external sensor and a first switching circuit; detecting whether an external sensor is accessed into the external interface circuit; if the external interface circuit has access of an external sensor, controlling the power supply between the first switching circuit and the external sensor to be communicated; temperature and humidity data in a deployment environment of the temperature and humidity recorder are acquired through a sensor and/or a first acquisition circuit; and carrying out early warning analysis on the temperature and humidity data, and generating a corresponding temperature and humidity acquisition report according to the analysis result. This application has realized effective collection and the record to the environmental data of different humiture scopes.
Description
Technical Field
The utility model relates to a temperature and humidity measurement equipment technical field, in particular to humiture record appearance.
Background
With the development of science and technology, especially on the aspect of recording the temperature and humidity change under the specific environment, the temperature and humidity recorder gradually replaces the traditional manual timing temperature and humidity measurement and recording, and is widely applied to production and life. However, since the temperature and humidity sensor of the temperature and humidity recorder has a fixed temperature measuring range and is fixedly installed to record temperature and humidity, the temperature and humidity of the environment outside the temperature measuring range and the temperature and humidity of the environment outside the corresponding range or other environment data cannot be measured, so that the temperature and humidity recorder cannot completely record part of the temperature and humidity data required or acquire other required data.
The existing temperature and humidity recorder records different environmental humiture or other environmental data, the temperature measurement range of the temperature and humidity sensor is enlarged or a plurality of temperature and humidity recorders are added to record the temperature and humidity in different ranges, and other environmental data are recorded by the recorders of different types, so that the cost for recording the environmental data such as the temperature and the humidity is greatly increased, the flexible and convenient arrangement of instruments under different environmental humiture and the measurement of the environmental data such as the temperature and the humidity can not be realized, and the existing temperature and humidity recorder can not flexibly and effectively record the environmental data such as the temperature and the humidity.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a humiture record appearance, the technical problem that the environment that aims at solving current humiture record appearance's sensor circuit design can't compatible different humiture scopes uses.
In order to achieve the above object, the temperature and humidity recorder provided by the utility model comprises a main control circuit, a first acquisition circuit and a second acquisition circuit; an external interface circuit and a first switching circuit which are used for connecting an external sensor are arranged in the second acquisition circuit; the main control circuit is respectively connected with the first acquisition circuit and the external interface circuit through serial ports, and the first switching circuit is arranged between the external interface circuit and the main control circuit; when the main control circuit outputs a first switching signal, the first switching circuit controls the power supply end of the main control circuit to be communicated with the power supply end of the external interface circuit.
In an embodiment of the present invention, the external interface circuit includes a data reading circuit and a power interface, the data reading circuit is respectively connected to the serial port of the main control circuit and the external sensor, and the power interface is respectively connected to the first switching circuit and the external sensor; when the main control circuit outputs the first switching signal, the data reading circuit receives a second temperature and humidity analog signal collected by the external sensor and transmits the second temperature and humidity analog signal to the main control circuit.
In an embodiment of the present invention, the first switching circuit includes a switching control circuit and a voltage conversion circuit, the switching control circuit is respectively connected to the first switching control serial interface in the main control circuit, the voltage conversion circuit and the external interface circuit, and the voltage conversion circuit is respectively connected to the serial port of the main control circuit and the switching control circuit; when the main control circuit outputs the first switching signal, the first switching circuit controls the voltage conversion circuit to be communicated with the power supply interface power supply.
The utility model discloses an in the embodiment, first acquisition circuit include temperature and humidity sensing circuit and respectively with two pull-up resistance and a filter capacitance that temperature and humidity sensing circuit connects, temperature and humidity sensing circuit passes through two pull-up resistance with master control circuit's serial ports connection, temperature and humidity sensing circuit passes through filter capacitance is connected with the earthing terminal.
The utility model discloses an embodiment, the master control circuit includes antenna circuit, main control chip and first crystal oscillator circuit, second crystal oscillator circuit and filter circuit, the main control chip pass through the serial ports respectively with antenna circuit first crystal oscillator circuit the second crystal oscillator circuit with filter circuit connects, the main control chip pass through the serial ports respectively with the data reading circuit first switching circuit voltage conversion circuit with first acquisition circuit connects, wherein the main control chip has data processing circuit, bluetooth control circuit's integrated chip for the integration.
The utility model discloses an embodiment, antenna circuit includes RC oscillating circuit and antenna, RC oscillating circuit includes a plurality of resistances and a plurality of electric capacity, a plurality of resistances with a plurality of electric capacity parallel connection, RC oscillating circuit respectively with main control chip's serial ports with antenna connection.
The utility model discloses an embodiment, the humiture record appearance still includes storage circuit, storage circuit includes memory chip, pull-up resistance and filter capacitance, memory chip pull-up resistance with filter capacitance respectively through the serial ports with main control chip connects, storage circuit is used for passing through main control circuit receives first humiture analog signal that first acquisition circuit gathered with second acquisition circuit acquires second humiture analog signal to the storage.
The utility model discloses an in the embodiment, the humiture record appearance still includes supply circuit, supply circuit include built-in power supply and respectively with built-in power supply parallel connection's a plurality of electric capacity, a plurality of electric capacity with built-in power supply parallel connection, built-in power supply respectively with main control chip's power serial ports memory chip's power serial ports with voltage conversion circuit connects.
In an embodiment of the present invention, the temperature and humidity recorder further includes a display circuit, the display circuit includes a display control circuit and a display, the display control circuit is connected to the serial port of the main control chip, and the display is connected to the display control circuit; when the main control chip outputs a display signal, the display control circuit controls the level conversion between the display control circuit and each connecting interface of the display.
In an embodiment of the present invention, the temperature and humidity recorder further includes a second switching circuit, the second switching circuit includes a first key circuit and a second key circuit, the first key circuit includes a first key and a first pull-down resistor, and the first key is respectively connected to the second switching control serial port interface of the main control chip and the first pull-down resistor; the second key circuit comprises a second key and a second pull-down resistor, and the second key is respectively connected with a second switching control serial port interface of the main control chip and the first pull-down resistor; when the first key and the second key output a second switching signal, the main control chip controls the power supply of the first acquisition circuit and the power supply of the second acquisition circuit to be communicated.
The temperature and humidity recorder in the technical proposal of the utility model at least comprises a first acquisition circuit, an external interface circuit used for connecting an external sensor and a first switching circuit; detecting whether an external sensor is accessed into the external interface circuit; if the external interface circuit has access of an external sensor, controlling the power supply between the first switching circuit and the external sensor to be communicated; temperature and humidity data in a deployment environment of the temperature and humidity recorder are acquired through a sensor and/or a first acquisition circuit; and carrying out early warning analysis on the temperature and humidity data, and generating a corresponding temperature and humidity acquisition report according to the analysis result. This application has realized effective collection and the record to the environmental data of different humiture scopes.
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 view of a second embodiment of the moderate temperature humidity recorder of the present invention;
fig. 3 is a schematic structural diagram of a first acquisition circuit in the present invention;
FIG. 4 is a schematic structural view of a third embodiment of the moderate temperature humidity recorder of the present invention;
fig. 5 is a schematic structural diagram of the antenna circuit according to the present invention;
fig. 6 is a schematic structural diagram of a memory circuit according to the present invention;
fig. 7 is a schematic structural diagram of a power supply circuit according to the present invention;
fig. 8 is a schematic structural diagram of a display circuit according to the present invention;
fig. 9 is a schematic structural diagram of a second switching 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 recorder, please refer to fig. 1, which comprises a main control circuit 10, a first acquisition circuit 20 and a second acquisition circuit 30; an external interface circuit 301 and a first switching circuit 302 for connecting an external sensor are arranged in the second acquisition circuit 30; the main control circuit 10 is connected to the first acquisition circuit 20 and the external interface circuit 301 through serial ports, and the first switching circuit 302 is disposed between the external interface circuit 301 and the main control circuit 10.
In this embodiment, when the main control circuit 10 outputs the first switching signal, the first switching circuit 302 controls the power end of the main control circuit 10 to be connected to the power end of the external interface circuit 301; and receiving and storing a first temperature and humidity analog signal acquired by the first acquisition circuit 20 and a second temperature and humidity analog signal acquired by the second acquisition circuit 30 through the main control circuit 10.
In practical application, whether external level conversion exists in a corresponding data exchange interface in the external interface circuit 301 is checked, and then when the external level conversion exists in the external interface circuit 301, a communication protocol of a corresponding connection interface of the external interface circuit 301 is obtained, and a preset protocol association table is used for identifying the type of the communication protocol; determining whether the external interface circuit 301 has access of an external sensor according to a protocol identification result, wherein if the communication protocol is a data reading protocol, the external interface circuit 301 is in data connection with a USB data reading interface; if the communication protocol is a sensor protocol, the external interface circuit 301 performs data connection with the external sensor.
After the external interface circuit 301 is checked whether the external sensor is connected, if the external interface circuit 301 has the external sensor connected, the main control circuit 10 outputs a first switching signal, so as to control the switch connection direction of the first switching circuit 302, and connect the external power supply between the external sensor and the first switching circuit 302, so as to control the first switching circuit 302 to convert the connected external power supply into an internal power supply, and provide a working power supply for the normal operation of the whole humiture recorder; further, according to the switching result of the switch, the external sensor is switched on to collect temperature and humidity data of the current deployment environment of the temperature and humidity recorder, and the temperature and humidity data of the first collecting circuit 20 is switched off; or, according to the result of the switch, the current deployment environment of the external sensor, the current humiture recorder, is switched on to collect the humiture data, and the current deployment environment of the first collecting circuit 20 is controlled to collect the humiture data. If the external sensor is connected and the first acquisition circuit 20 is disconnected, controlling the external sensor to acquire second temperature and humidity data in the deployment environment of the temperature and humidity recorder; if the external sensor is connected and the first acquisition circuit 20 is connected, the external sensor is controlled to acquire second temperature and humidity data in the deployment environment of the temperature and humidity recorder, and the first acquisition circuit 20 is controlled to acquire first temperature and humidity data in the deployment environment of the temperature and humidity recorder.
Preprocessing the temperature and humidity data acquired by the first acquisition circuit 20 or the external sensor by data flow, and performing unified data size processing on the temperature and humidity data to be processed so as to calculate local abnormal values of the preprocessed temperature and humidity data; and comparing the local abnormal value with a preset early warning value, generating a corresponding early warning analysis report according to the comparison result, and generating a corresponding temperature and humidity acquisition report by using a preset analysis template. And then temporarily storing the generated temperature and humidity acquisition report to the main control circuit 10 or to a storage circuit, or sending the generated temperature and humidity acquisition report to a corresponding receiver by using a wireless transmission mode through an antenna circuit or a wired transmission mode through connecting an external interface circuit 301 with a reading device.
As shown in fig. 2, the external interface circuit 301 includes a data reading circuit 3012 and a power interface 3011, the data reading circuit 3012 is connected to the serial port of the main control circuit 10 and the external sensor, and the power interface 3011 is connected to the first switching circuit 302 and the external sensor; the first switching circuit 302 includes a switching control circuit 3021 and a voltage conversion circuit 3022, the switching control circuit 3021 is respectively connected to the first switching control serial interface of the main control circuit 10, the voltage conversion circuit 3022 and the external interface circuit 301, and the voltage conversion circuit 3022 is respectively connected to the serial interface of the main control circuit 10 and the switching control circuit 3021.
In this embodiment, when the main control circuit 10 outputs a first switching signal, the first switching circuit 302 controls the voltage conversion circuit 3022 to be in power connection with the power interface 3011; the data reading circuit 3012 receives a second temperature and humidity analog signal collected by the external sensor, and transmits the second temperature and humidity analog signal to the main control circuit 10.
In practical applications, when the main control circuit 10 outputs the first switching signal, after the power supply between the external sensor and the switching control circuit 3021 is connected, the control voltage conversion circuit 3022 converts the connected external power supply into the internal power supply, for example, the high voltage of the external power supply is converted into the low voltage of the internal power supply by reducing the voltage, or the low voltage of the external power supply is converted into the high voltage of the internal power supply by increasing the voltage, so as to provide the normal operation of the humiture recording instrument or charge the internal power supply. According to the condition that the circuit is connected, if the external sensor is connected and the first acquisition circuit 20 is disconnected, the external sensor is controlled to acquire a second temperature and humidity analog signal in the deployment environment of the temperature and humidity recorder and transmit the second temperature and humidity analog signal to the main control circuit 10.
Whether the external interface circuit 301 has the access of an external sensor or not is checked, then corresponding data processing is realized according to different access devices, the switched-on external power supply is converted into an internal power supply through the voltage conversion circuit 3022, external power supply or charging is carried out on the temperature and humidity recorder while temperature and humidity data acquisition is carried out by the external sensor, and the working time of the temperature and humidity recorder is prolonged.
Whether the external sensor is accessed currently is checked, and then the first switching circuit 302 is utilized to control the power supply of the external sensor to be communicated, so that the first acquisition circuit 20 and the external sensor are controlled to perform corresponding acquisition work, the temperature and humidity recorder can complete acquisition of environmental data in different temperature and humidity ranges, the sensor circuit design of the temperature and humidity recorder is used in environment compatibility in different temperature and humidity ranges, and the use range of the temperature and humidity recorder for temperature and humidity data acquisition is enlarged.
As shown in fig. 3, the first collecting circuit 20 includes a temperature and humidity sensing circuit, two pull-up resistors and a filter capacitor, which are respectively connected to the temperature and humidity sensing circuit, the temperature and humidity sensing circuit is connected to the serial port of the main control circuit 10 through the two pull-up resistors, and the temperature and humidity sensing circuit is connected to the ground terminal through the filter capacitor.
In this embodiment, the main control circuit 10 is connected with the power end of the temperature and humidity sensor, the clock end and the data end, and when data transmission is performed, the potential transition is realized through the two pull-up resistors, and when the temperature and humidity sensor collects a first temperature and humidity analog signal, the first temperature and humidity analog signal is transmitted to the main control circuit 10 after being pulled up through the data end.
As shown in fig. 4, the main control circuit 10 includes an antenna circuit 101, a main control chip 102, a first crystal oscillator circuit 103, a second crystal oscillator circuit 104, and a filter circuit 105, the main control chip 102 is connected to the antenna circuit 101, the first crystal oscillator circuit 103, the second crystal oscillator circuit 104, and the filter circuit 105 through serial ports, the main control chip 102 is connected to the data reading circuit 3012, the first switching circuit 302, the voltage conversion circuit 3022, and the first acquisition circuit 20 through serial ports, respectively, where the main control chip 102 is an integrated chip integrated with a data processing circuit and a bluetooth control circuit.
In this embodiment, the first crystal oscillator circuit 103 and the second crystal oscillator circuit 104 are connected to the main control chip 102, and provide clock reference frequencies of 32MHz and 32kHz for the main control chip 102; when the recorded temperature and humidity data needs to be sent out, the main control chip 102 wirelessly sends out the modulated 101 signal through the control antenna circuit 101, or receives a signal sent to the main control chip 102 from the outside through the antenna circuit 101; when the main control chip 102 is in operation, the filter circuit 105 provides signals and filtering and voltage stabilizing processing of the power supply for the main control circuit 10.
As shown in fig. 5, the antenna circuit 101 includes an RC oscillation circuit and an antenna, the RC oscillation circuit includes a plurality of resistors and a plurality of capacitors, the plurality of resistors are connected in parallel with the plurality of capacitors, and the RC oscillation circuit is connected to the serial port of the main control chip 102 and the antenna, respectively.
In this embodiment, when the main control chip 102 transmits a signal to be transmitted to the antenna circuit 101, the RC oscillation circuit performs signal oscillation on the signal to be transmitted, generates a signal with a corresponding waveform, and transmits the signal by connecting to the bluetooth antenna.
As shown in fig. 6, the humiture recorder further includes a storage circuit, the storage circuit includes a storage chip, a pull-up resistor and a filter capacitor, and the storage chip, the pull-up resistor and the filter capacitor are respectively connected to the main control chip through serial ports.
In this embodiment, when the main control chip 102 receives the first temperature and humidity analog signal acquired by the first acquisition circuit and the second temperature and humidity analog signal acquired by the second acquisition circuit, data signal processing is performed on analog information to obtain data to be stored, the data to be stored is sent to the storage circuit, and the storage chip stores the data to be stored.
As shown in fig. 7, the temperature and humidity recorder further includes a power supply circuit, where the power supply circuit includes a built-in power supply and a plurality of capacitors respectively connected in parallel with the built-in power supply, the plurality of capacitors are connected in parallel with the built-in power supply, and the built-in power supply is respectively connected with the power serial port of the main control chip 102, the power serial port of the memory chip, and the voltage conversion circuit 3022.
In this embodiment, the temperature and humidity recorder can have the difference to power supply circuit's job control under the state of work and dormancy, under low temperature environment, built-in power supply's internal resistance can become very big, lead to power supply circuit's output voltage step-down, and operating current is less, can't satisfy the job requirement of temperature and humidity recorder, but little electric current can charge to a plurality of electric capacity of parallelly connected on built-in power supply, when master control circuit 10 output work start signal, can discharge in the twinkling of an eye when the recorder awakens back built-in power supply during operation, provide the electric current that satisfies recorder job requirement.
As shown in fig. 8, the temperature and humidity recorder further includes a display circuit, the display circuit includes a display control circuit and a display, the display control circuit is connected to the serial port of the main control chip 102, and the display is connected to the display control circuit.
In this embodiment, after the main control chip 102 obtains the corresponding display instruction, the corresponding output display signal is generated and output, and after receiving the output display signal, the display control circuit controls the level conversion between the display control circuit and each connection interface of the display, so as to display the corresponding data by the display.
As shown in fig. 9, the temperature and humidity recorder further includes a second switching circuit, where the second switching circuit includes a first key circuit and a second key circuit, and the first key circuit and the second key circuit are respectively connected to the serial port of the main control chip 102; the first key circuit comprises a first key and a first pull-down resistor, and the first key is respectively connected with a second switching control serial port interface of the main control chip 102 and the first pull-down resistor; the second key circuit comprises a second key and a second pull-down resistor, and the second key is connected with the second switching control serial port interface of the main control chip 102 and the first pull-down resistor respectively.
In this embodiment, a group formed by a first key circuit, a second key circuit and a combination of the first key circuit and the second key circuit is monitored according to a preset related second switching mode, and after a corresponding key is pressed, a corresponding key switching instruction is generated according to a single key circuit or a combined case circuit and is sent to the main control chip 102, so that the main control chip 102 acquires temperature and humidity data between the first acquisition circuit 20 and the second acquisition circuit 30, and controls display of the display circuit and control processing of other circuits.
In this embodiment, the circuits are all carried by the circuit board, and the housing is further arranged to ensure the working environment of the temperature and humidity recorder in a low-temperature environment.
For the circuits, the circuits are connected through circuit circuits on the BCB board, and the fixed installation of the circuits is realized by fixing the PCB board on the shell, wherein in practical application, the shell comprises a first shell and a second shell;
the first shell is provided with a mounting cavity which is suitable for a PCB (printed circuit board) for bearing the main control circuit 10, the first acquisition circuit 20, the second acquisition circuit 30 and the serial communication circuit;
the second shell is provided with a matching cavity matched with the mounting cavity;
the PCB is fixed in the mounting cavity and the cavity formed when the matching cavity is closed in an interference fit mounting 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 a battery to be mounted in, and the battery is mounted on the shell through the mounting port and is connected with the circuits to provide corresponding voltage so as to provide working energy.
By implementing the temperature and humidity recorder, whether the external interface circuit is connected to the external sensor or not is checked, and then power supply communication between the first switching circuit and the external sensor is controlled; therefore, the external sensor and the first acquisition circuit are controlled to carry out correspondingly combined data acquisition according to preset acquisition conditions, the acquired data are subjected to preprocessing analysis, and a temperature and humidity acquisition report is generated according to an analysis result. The data acquisition method under different temperature and humidity conditions is realized, the sensor circuit of the temperature and humidity recorder is compatible with different temperature and humidity ranges or other preset different conditions, and the application range and the scene of the temperature and humidity recorder are enlarged.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A temperature and humidity recorder is characterized by comprising a main control circuit, a first acquisition circuit and a second acquisition circuit;
an external interface circuit and a first switching circuit which are used for connecting an external sensor are arranged in the second acquisition circuit;
the main control circuit is respectively connected with the first acquisition circuit and the external interface circuit through serial ports, and the first switching circuit is arranged between the external interface circuit and the main control circuit; when the main control circuit outputs a first switching signal, the first switching circuit controls the power supply end of the main control circuit to be communicated with the power supply end of the external interface circuit.
2. The temperature and humidity recorder according to claim 1, wherein the external interface circuit comprises a data reading circuit and a power interface, the data reading circuit is respectively connected with the serial port of the main control circuit and the external sensor, and the power interface is respectively connected with the first switching circuit and the external sensor; when the main control circuit outputs the first switching signal, the data reading circuit receives a second temperature and humidity analog signal collected by the external sensor and transmits the second temperature and humidity analog signal to the main control circuit.
3. The humiture recorder according to claim 2, wherein the first switching circuit comprises a switching control circuit and a voltage conversion circuit, the switching control circuit is respectively connected with a first switching control serial interface in the main control circuit, the voltage conversion circuit and the external interface circuit, and the voltage conversion circuit is respectively connected with a serial interface of the main control circuit and the switching control circuit; when the main control circuit outputs the first switching signal, the first switching circuit controls the voltage conversion circuit to be communicated with the power supply interface power supply.
4. The temperature and humidity recorder according to claim 1, wherein the first acquisition circuit comprises a temperature and humidity sensing circuit, and two pull-up resistors and a filter capacitor which are respectively connected with the temperature and humidity sensing circuit, the temperature and humidity sensing circuit is connected with a serial port of the main control circuit through the two pull-up resistors, and the temperature and humidity sensing circuit is connected with a ground terminal through the filter capacitor.
5. The humiture recorder according to claim 3, wherein the main control circuit comprises an antenna circuit, a main control chip, a first crystal oscillator circuit, a second crystal oscillator circuit and a filter circuit, the main control chip is connected with the antenna circuit, the first crystal oscillator circuit, the second crystal oscillator circuit and the filter circuit through serial ports, the main control chip is connected with the data reading circuit, the first switching circuit, the voltage conversion circuit and the first acquisition circuit through serial ports, and the main control chip is an integrated chip integrated with a data processing circuit and a Bluetooth control circuit.
6. The temperature and humidity recorder according to claim 5, wherein the antenna circuit comprises an RC oscillating circuit and an antenna, the RC oscillating circuit comprises a plurality of resistors and a plurality of capacitors, the plurality of resistors are connected in parallel with the plurality of capacitors, and the RC oscillating circuit is connected with the serial port of the main control chip and the antenna respectively.
7. The temperature and humidity recorder according to claim 5, further comprising a storage circuit, wherein the storage circuit comprises a storage chip, a pull-up resistor and a filter capacitor, the storage chip, the pull-up resistor and the filter capacitor are respectively connected with the main control chip through serial ports, and the storage circuit is configured to receive and store the first temperature and humidity analog signal acquired by the first acquisition circuit and the second temperature and humidity analog signal acquired by the second acquisition circuit through the main control circuit.
8. The temperature and humidity recorder according to claim 7, further comprising a power supply circuit, wherein the power supply circuit comprises a built-in power supply and a plurality of capacitors connected in parallel with the built-in power supply, the plurality of capacitors are connected in parallel with the built-in power supply, and the built-in power supply is connected with the power supply serial port of the main control chip, the power supply serial port of the storage chip and the voltage conversion circuit.
9. The temperature and humidity recorder according to claim 5, further comprising a display circuit, wherein the display circuit comprises a display control circuit and a display, the display control circuit is connected with the serial port of the main control chip, and the display is connected with the display control circuit; when the main control chip outputs a display signal, the display control circuit controls the level conversion between the display control circuit and each connecting interface of the display.
10. The temperature and humidity recorder according to claim 5, further comprising a second switching circuit, wherein the second switching circuit comprises a first key circuit and a second key circuit, the first key circuit comprises a first key and a first pull-down resistor, and the first key is respectively connected to a second switching control serial port interface of the main control chip and the first pull-down resistor; the second key circuit comprises a second key and a second pull-down resistor, and the second key is respectively connected with a second switching control serial port interface of the main control chip and the first pull-down resistor; when the first key and the second key output second switching signals, the main control chip controls the power supply of the first acquisition circuit and the power supply of the second acquisition circuit to be communicated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221308937.1U CN217465853U (en) | 2022-05-27 | 2022-05-27 | Temperature and humidity recorder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221308937.1U CN217465853U (en) | 2022-05-27 | 2022-05-27 | Temperature and humidity recorder |
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| CN217465853U true CN217465853U (en) | 2022-09-20 |
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| CN202221308937.1U Active CN217465853U (en) | 2022-05-27 | 2022-05-27 | Temperature and humidity recorder |
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| CN (1) | CN217465853U (en) |
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