阅读说明：本技术 冷链快递pda扫描头镜片加热电路及pda设备 (Cold chain express delivery PDA scanning head lens heating circuit and PDA equipment ) 是由 柳子琼 陈泉 张帅 于 2021-10-12 设计创作，主要内容包括：本申请涉及一种冷链快递PDA扫描头镜片加热电路及PDA设备,冷链快递PDA扫描头镜片加热电路包括降压恒流源、输出电压接口、加热焊丝,降压恒流源包括输入端口和输出端口,输入端口与输出电压接口连接,输出端口与加热焊丝连接,输出电压接口用于连接外部电压,降压恒流源根据外部电压控制输出端口输出不同的PWM波形,不同的PWM波形用于控制加热焊丝输出不同的加热功率。本申请可以实现根据不同使用环境控制不同加热温度进行加热除水雾,提高加热效率,提升用户体验。(The utility model relates to a cold chain express delivery PDA scanning head lens heating circuit and PDA equipment, cold chain express delivery PDA scanning head lens heating circuit includes the step-down constant current source, the output voltage interface, the heating wire, the step-down constant current source includes input port and output port, input port and output voltage interface connection, output port and heating wire connection, the output voltage interface is used for connecting external voltage, the step-down constant current source exports different PWM wave forms according to external voltage control output port, different PWM wave forms are used for the different heating power of control heating wire output. The heating and water mist removing device can realize heating and water mist removing according to different heating temperatures controlled by different use environments, improves heating efficiency and improves user experience.)

1. The utility model provides a cold chain express delivery PDA scanning head lens heating circuit which characterized in that includes:

the voltage reduction constant current source, the output voltage interface and the heating welding wire are connected;

the voltage reduction constant current source comprises an input port and an output port, and the input port is connected with the output voltage interface; the output port is connected with the heating welding wire;

the output voltage interface is used for connecting external voltage, the voltage reduction constant current source controls the output port to output different PWM waveforms according to the external voltage, and the different PWM waveforms are used for controlling the heating welding wire to output different heating powers.

2. The cold chain express PDA scanning head lens heating circuit of claim 1, wherein the step-down constant current source is a PT4115 chip, the PT4115 chip further comprising:

and the current sampling port is used for acquiring heating current.

3. The cold chain express PDA scanning head lens heating circuit of claim 2, further comprising:

and the current limiting resistor is connected with the current sampling port and used for limiting the heating current.

4. The cold chain express PDA scanning head lens heating circuit of claim 2, further comprising:

and the freewheeling diode is connected with the current sampling port and the heating welding wire and used for protecting the heating welding wire.

5. The cold chain courier PDA scan head lens heating circuit of claim 3, further comprising:

a loop inductor connected to the output port;

the heating welding wire is arranged between the loop inductor and the current limiting resistor, so that the loop inductor, the heating welding wire and the loop resistor form a heating loop.

6. A PDA device, comprising:

the cold chain express PDA scanning head lens heating circuit of any one of claims 1 to 5.

7. The PDA device of claim 6, further comprising:

and the physical key is connected with an input voltage interface in a lens heating circuit of the cold chain express PDA scanning head.

8. The PDA device of claim 7, further comprising:

the physical key is used for controlling different external voltages to be input into the input voltage interface through the superposition times of the user keys.

9. The PDA device of claim 8, wherein said controlling the input of different external voltages to said input voltage interface by the number of times the user presses a key stack comprises:

the key superposition frequency is 1, and the input high voltage is controlled;

the key superposition frequency is 2, and the input low voltage is controlled;

the number of times of key superposition is 3, the input voltage is controlled to be 0, and the number of times of superposition is cleared.

Technical Field

This application belongs to PDA equipment technical field, concretely relates to cold chain express delivery PDA scanning head lens heating circuit and PDA equipment.

Background

Along with the development of modern logistics industry, the fresh transportation of cold chain is more and more developed, but the PDA product that uses in the cold chain industry at present can have the low temperature and get back to the normal atmospheric temperature after the lens produce the fog and can't scan, influence work efficiency, and the inside steam of fuselage causes equipment life very short, can't charge scheduling problem in the freezer.

The demisting and heating of the cold chain PDA lens in the current market usually uses a fixed temperature, but because the PDA application environment is different, heating at the fixed temperature to remove water mist may cause overlong heating time or energy waste, and user experience is influenced.

Disclosure of Invention

For at least overcoming current cold chain express delivery PDA scanning head lens to a certain extent and using fixed temperature to heat and remove water smoke, probably cause the hot time overlength or the energy is extravagant, influence user experience's problem, this application provides a cold chain express delivery PDA scanning head lens heating circuit and PDA equipment.

In a first aspect, the present application provides a cold chain express delivery PDA scanning head lens heating circuit, including:

the voltage reduction constant current source, the output voltage interface and the heating welding wire are connected;

the voltage reduction constant current source comprises an input port and an output port, and the input port is connected with the output voltage interface; the output port is connected with the heating welding wire;

the output voltage interface is used for connecting external voltage, the voltage reduction constant current source controls the output port to output different PWM waveforms according to the external voltage, and the different PWM waveforms are used for controlling the heating welding wire to output different heating powers.

Further, step-down constant current source is PT4115 chip, PT4115 chip further includes:

and the current sampling port is used for acquiring heating current.

Further, the method also comprises the following steps:

and the current limiting resistor is connected with the current sampling port and used for limiting the heating current.

Further, the method also comprises the following steps:

and the freewheeling diode is connected with the current sampling port and the heating welding wire and used for protecting the heating welding wire.

Further, the method also comprises the following steps:

a loop inductor connected to the output port;

the heating welding wire is arranged between the loop inductor and the current limiting resistor, so that the loop inductor, the heating welding wire and the current limiting resistor form a heating loop.

In a second aspect, the present application provides a PDA device comprising:

the cold chain express PDA scanning head lens heating circuit of the first aspect.

Further, the method also comprises the following steps:

and the physical key is connected with an input voltage interface in a lens heating circuit of the cold chain express PDA scanning head.

Further, the method also comprises the following steps:

the physical key is used for controlling different external voltages to be input into the input voltage interface through the superposition times of the user keys.

Further, the controlling of the number of times of key superposition by the user to input different external voltages to the input voltage interface includes:

the key superposition frequency is 1, and the input high voltage is controlled;

the key superposition frequency is 2, and the input low voltage is controlled;

the number of times of key superposition is 3, the input voltage is controlled to be 0, and the number of times of superposition is cleared.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

the cold chain express PDA scanning head lens heating circuit comprises a voltage reduction constant current source, an output voltage interface and a heating welding wire, wherein the voltage reduction constant current source comprises an input port and an output port, the input port is connected with the output voltage interface, the output port is connected with the heating welding wire, the output voltage interface is used for being connected with external voltage, the voltage reduction constant current source controls the output port to output different PWM waveforms according to the external voltage, the different PWM waveforms are used for controlling the heating welding wire to output different heating powers, and therefore heating and water mist removal are achieved by controlling different heating temperatures according to different use environments, heating efficiency is improved, and user experience is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Fig. 1 is a circuit diagram of a lens heating circuit of a scanning head of a cold chain express PDA according to an embodiment of the present application.

Fig. 2 is a functional block diagram of a PDA device according to an embodiment of the present application.

Fig. 3 is a flow chart of cold-chain express delivery provided in an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 is a circuit diagram of a cold chain express PDA scanning head lens heating circuit according to an embodiment of the present application, and as shown in fig. 1, the cold chain express PDA scanning head lens heating circuit includes:

the device comprises a voltage reduction constant current source 1, an output voltage interface 2 and a heating welding wire 3;

the voltage reduction constant current source 1 comprises an input port DIM and an output port SW, wherein the input port DIM is connected with the output voltage interface 2; the output port SW is connected with the heating welding wire 3;

the output voltage interface is used for connecting external voltage, the voltage reduction constant current source controls the output port SW to output different PWM waveforms according to the external voltage, and the different PWM waveforms are used for controlling the heating welding wire 3 to output different heating powers.

The existing demisting and heating of the cold chain PDA lens usually uses a fixed temperature, but because the PDA application environments are different, heating at the fixed temperature to remove water mist may cause overlong heating time or energy waste, and user experience is influenced.

In this embodiment, cold chain express delivery PDA scanning head lens heating circuit includes the step-down constant current source, the output voltage interface, the heating wire, the step-down constant current source includes input port and output port, input port and output voltage interface connection, the output port is connected with the heating wire, the output voltage interface is used for connecting the external voltage, the step-down constant current source exports different PWM wave forms according to external voltage control output port, different PWM wave forms are used for the different heating power of control heating wire output, thereby realize heating according to different service environment control different heating temperature and remove the water smoke, heating efficiency is improved, user experience is promoted.

As shown in fig. 1, the step-down constant current source is a PT4115 chip, and the PT4115 chip further includes:

and the current sampling port CSN is used for acquiring heating current.

This cold chain express delivery PDA scanning head lens heating circuit still includes:

and the current limiting resistor 4(R22910) are connected with the current sampling port CSN and used for limiting the heating current.

The maximum current IOUT is limited to (0.085+0.115)/(2 × R22910) flowing through the entire heating wire.

A free wheel diode 5(D1), the free wheel diode 5(D1) is connected with the current sampling port CSN and the heating wire 3 for protecting the heating wire 3.

A loop inductor 6(L1) connected to the output port;

the heating welding wire is arranged between the loop inductor and the current limiting resistor, so that the loop inductor, the heating welding wire and the current limiting resistor form a heating loop.

When the DIM inputs a high level, the mos tube in the PT4115 chip is conducted, and SW and GND are conducted; the R22910, the heating welding wire and the L1 form a heating loop, and the heating welding wire generates heat when the heating loop is conducted; when the DIM inputs a low level, the mos tube in the PT4115 chip is cut off, and the SW and the GND are disconnected; the heating loop formed by the R22910, the heating welding wire and the L1 is disconnected, and the heating welding wire stops heating; and the heating power of the heating welding wire is controlled by changing the PWM waveform of the output duty ratio of the DIM pin.

In this embodiment, give equipment scanning lens heating through cold chain express delivery PDA scanning head lens heating circuit, can effectively avoid the condition that the scanning lens that arouses is a large amount of hazings because of frequently cominging in and going out the freezer, the loading link of unloading to cold chain express mail recognition rate has been promoted and cold chain express mail commodity circulation transit prescription has been accelerated, has reduced the rate of missing to sweep.

An embodiment of the present invention provides a PDA device, as shown in a functional structure diagram in fig. 2, where the PDA device includes:

the cold chain express PDA scanning head lens heating circuit 21 as described in the above embodiment.

In some embodiments, further comprising:

and the physical key 22 is connected with an input voltage interface in the cold chain express PDA scanning head lens heating circuit 21.

The physical keys 22 are used for acquiring the number of times of pressing the keys by the user to control the input of different external voltages to the input voltage interface.

The physical keys 22 are used for controlling the input of different external voltages to the input voltage interface through the user's key superposition times.

In some embodiments, the controlling the input of different external voltages to the input voltage interface by the number of times of the user key superposition includes:

the key superposition frequency is 1, and the input high voltage is controlled;

the key superposition frequency is 2, and the input low voltage is controlled;

the number of times of key superposition is 3, the input voltage is controlled to be 0, and the number of times of superposition is cleared.

And (3) heating temperature control: the physical key combination key FN +1 controls and inputs a high voltage FN +2 and a low voltage FN +3 to control and close the duty ratio of the DIM pin on the pulse width according to the input size of the external heating voltage, so that the heating power of the heating wire is controlled to reach the control temperature.

Cold chain express logistics flow: the method comprises the steps of firstly, automatically placing a delivery terminal in a warehouse of a company, and then, placing a delivery terminal in the warehouse of the company, wherein the warehouse of the company is divided into a first delivery terminal and a second delivery terminal, and the first delivery terminal and the second delivery terminal are connected with each other.

As shown in fig. 3, the scanning, collecting and uploading of the logistics track of the cold chain express mail is rapidly completed by heating the lens of the scanning device, and the detailed operation method is as follows:

step 1: cold chain warehouse of cold chain express merchant, cold chain warehouse in express delivery and warehouse out/in operation;

step 2: express delivery of loading/unloading operation of a cold chain vehicle;

and step 3: triggering a physical key to heat according to the use environment temperature;

and 4, step 4: and heating and demisting the lens to complete the scanning and acquisition of the logistics track of the cold-chain express.

In the embodiment, the problems of missed scanning and incapability of identifying the bill of a face caused by fogging are solved by heating the lens of the scanning equipment, and the effects of avoiding damage of merchant credit, improving platform ranking, keeping express fresh and improving transit timeliness are achieved.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

It should be noted that the present invention is not limited to the above-mentioned preferred embodiments, and those skilled in the art can obtain other products in various forms without departing from the spirit of the present invention, but any changes in shape or structure can be made within the scope of the present invention with the same or similar technical solutions as those of the present invention.