Communication positioning circuit and stopwatch

Abstract

The utility model relates to a communication positioning circuit and a stopwatch. The communication positioning circuit comprises a master control module, a positioning unit, a communication unit and a third antenna, the positioning unit comprises a positioning module and a first antenna, the positioning module is electrically connected with the main control module, the first antenna is electrically connected with the positioning module, and the first antenna is used for receiving a positioning signal; the communication unit comprises a communication module and a second antenna, the communication module is electrically connected with the main control module, the second antenna is electrically connected with the communication module, and the second antenna is used for transmitting Bluetooth signals; and the third antenna is electrically connected with the main control module and is used for transmitting an ANT + signal. The second antenna and the third antenna independently transmit signals and do not interfere with each other, so that signal instability is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cyclometers, in particular to a communication positioning circuit and a cyclometer. Background Art

[0002] A cyclometer is an electronic product installed on a bicycle or the like to record and display several cycling data, such as the current speed, cycling mileage, and cycling time, etc., and high-end cyclometers also have altitude, air pressure, and slope display, etc.

[0003] Currently, the antenna used by a cyclometer to receive and transmit signals generally selects a patch antenna. Usually, only one patch antenna is configured for receiving and transmitting various signals. However, due to the different frequencies of various signals, if signals are received or transmitted at the same time, interference will occur between various signals, resulting in unstable received or transmitted signals. In addition, nowadays, cyclometers pursue miniaturization, so the space of the cyclometer is relatively limited, and the patch antenna cannot be installed in the cyclometer. Summary of the Utility Model

[0004] Based on the above description, the utility model provides a communication positioning circuit and a cyclometer, aiming to solve the problems that the signals received or transmitted by the patch antenna of the existing cyclometer are easily interfered and thus unstable, and the patch antenna is difficult to be installed in the narrow space of the cyclometer.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] In the first aspect, a communication positioning circuit includes:

[0007] A main control module;

[0008] A positioning unit, including a positioning module and a first antenna. The positioning module is electrically connected to the main control module, the first antenna is electrically connected to the positioning module, and the first antenna is used for receiving positioning signals;

[0009] A communication unit, including a communication module and a second antenna. The communication module is electrically connected to the main control module, the second antenna is electrically connected to the communication module, and the second antenna is used for transmitting Bluetooth signals;

[0010] A third antenna, electrically connected to the main control module, and the third antenna is used for transmitting ANT+ signals.

[0011] Based on the above technical solution, the utility model can be further improved as follows.

[0012] Further, the positioning unit includes a first filter, a low-noise amplifier, and a second filter. The first filter, the low-noise amplifier, and the second filter are sequentially connected in series between the first antenna and the positioning module.

[0013] Further, the communication unit includes a program download and debugging port, and the program download and debugging port is electrically connected to the communication module.

[0014] Further, the communication unit includes a radio frequency test port, and the radio frequency test port is electrically connected to the communication module.

[0015] Further, it includes two clock units, and the two clock units are electrically connected to the positioning module and the communication module in a one-to-one correspondence.

[0016] Further, the clock unit includes a crystal oscillator circuit and a crystal oscillator.

[0017] Further, the first antenna includes a first conductive sheet, a first impedance matching circuit, and a bidirectional diode. The first conductive sheet has a first feed point and a second feed point. The first impedance matching circuit includes a first resistor and a first capacitor. The first resistor is connected in series between the first feed point and the input end of the positioning module. One end of the first capacitor is connected in parallel to the end of the first resistor away from the first feed point, and the other end of the first capacitor is grounded. The second feed point is grounded. The second end of the bidirectional diode is connected in parallel between the first feed point and the first resistor, and the first end of the bidirectional diode is grounded.

[0018] Further, the second antenna includes a second conductive sheet and a second impedance matching circuit. The second conductive sheet has a third feed point and a fourth feed point. The second impedance matching circuit includes a second resistor, a third resistor, a second capacitor, a third capacitor, and a fourth capacitor. The second resistor and the third resistor are sequentially connected in series between the output end of the communication module and the third feed point. One end of the second capacitor is connected in parallel between the output end of the communication module and the second resistor. One end of the third capacitor is connected in parallel between the second resistor and the third resistor. One end of the fourth capacitor is connected in parallel between the third resistor and the third feed point. The other ends of the second capacitor, the third capacitor, and the fourth capacitor are all grounded. The fourth feed point is grounded.

[0019] Further, the third antenna includes a third conductive sheet and a second impedance matching circuit. The third conductive sheet has a fifth feeding point and a sixth feeding point. The second impedance matching circuit includes a fifth capacitor, a fourth resistor, a sixth capacitor, a fifth resistor, a seventh capacitor, and an eighth capacitor. The fifth capacitor and the fourth resistor are connected in series between the output terminal of the main control module and the fifth feeding point in sequence. One end of the sixth capacitor is connected in parallel between the output terminal of the main control module and the fifth capacitor. The fifth resistor and the seventh capacitor are connected in series in sequence. The other end of the fifth resistor is connected in parallel between the fifth capacitor and the fourth resistor. One end of the eighth capacitor is connected in parallel between the fifth resistor and the fifth feeding point. The other ends of the sixth capacitor, the seventh capacitor, and the eighth capacitor are all grounded, and the sixth feeding point is grounded.

[0020] In a second aspect, a code table is provided, and the communication and positioning circuit described in the first aspect is provided inside the code table.

[0021] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0022] (1) In the present application, the second antenna and the third antenna independently transmit signals respectively, and they do not interfere with each other, avoiding signal instability.

[0023] (2) In the present application, the positioning signal is amplified and filtered through the first filter, the low-noise amplifier, and the second filter, which is beneficial for the positioning module to accurately identify the positioning signal and facilitates the operation of the positioning module.

[0024] (3) In the present application, through the miniaturization design of the first conductive sheet, the second conductive sheet, and the third conductive sheet, and then through the cooperation of the first impedance matching circuit and the bidirectional diode with the first conductive sheet, the third conductive sheet with the third impedance matching circuit, and the third conductive sheet with the third impedance matching circuit, it can not only be installed in a narrow space, reducing space occupation, but also realize signal reception. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a communication and positioning circuit provided in an embodiment of the present utility model;

[0026] Figure 2 It is a circuit diagram of an active crystal oscillator circuit in an embodiment of the present utility model;

[0027] Figure 3 It is a schematic structural diagram of a first conductive sheet in an embodiment of the present utility model;

[0028] Figure 4 It is a circuit diagram of a first impedance matching circuit in an embodiment of the present utility model;

[0029] Figure 5Schematic diagram of the second conductive sheet in the embodiment of the present utility model;

[0030] Figure 6 Circuit diagram of the second impedance matching circuit in the embodiment of the present utility model;

[0031] Figure 7 Schematic diagram of the third conductive sheet in the embodiment of the present utility model;

[0032] Figure 8 Circuit diagram of the third impedance matching circuit in the embodiment of the present utility model.

[0033] Description of reference numerals:

[0034] 10, main control module;

[0035] 20, positioning unit; 21, positioning module; 22, first antenna; 221, first conductive sheet; 2211, first feeding point; 2212, second feeding point; 222, first impedance matching circuit; 2221, first resistor; 2222, first capacitor; 223, bidirectional diode; 23, first filter; 24, low-noise amplifier; 25, second filter;

[0036] 30, communication unit; 31, communication module; 32, second antenna; 321, second conductive sheet; 3211, third feeding point; 3212, fourth feeding point; 322, second impedance matching circuit; 3221, second resistor; 3222, third resistor; 3223, second capacitor; 3224, third capacitor; 3225, fourth capacitor; 33, program download and debugging port; 34, radio frequency test port;

[0037] 40, third antenna; 41, third conductive sheet; 411, fifth feeding point; 412, sixth feeding point; 42, third impedance matching circuit; 421, fifth capacitor; 422, fourth resistor; 423, sixth capacitor; 424, fifth resistor; 425, seventh capacitor; 426, eighth capacitor;

[0038] 50, clock unit; 51, crystal oscillator circuit; 52, crystal oscillator. Detailed implementation manners

[0039] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0041] It will be understood that spatial relationship terms such as "under", "below", "beneath", "underneath", "above", "upper", etc. may be used herein to describe the relationship of one element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "under" or "beneath" or "underneath" another element or feature will be oriented "above" the other element or feature. Thus, the exemplary terms "under" and "beneath" can include both an upper and a lower orientation. In addition, the device may also include additional orientations (such as rotating 90 degrees or other orientations), and the spatial descriptors used herein are to be interpreted accordingly.

[0042] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprises / comprising" or "has / have" etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0043] Referring to the attached Figure 1 As shown, the present utility model provides a technical solution: a communication positioning circuit, comprising a main control module 10, a positioning unit 20, a communication unit 30 and a third antenna 40; the positioning unit 20 includes a positioning module 21 and a first antenna 22, the positioning module 21 is electrically connected to the main control module 10, the first antenna 22 is electrically connected to the positioning module 21, and the first antenna 22 is used for receiving positioning signals; the communication unit 30 includes a communication module 31 and a second antenna 32, the communication module 31 is electrically connected to the main control module 10, the second antenna 32 is electrically connected to the communication module 31, and the second antenna 32 is used for transmitting Bluetooth signals; the third antenna 40 is electrically connected to the main control module 10, and the third antenna 40 is used for transmitting ANT+ signals.

[0044] Exemplarily, the model of the main control module 10 may be SF32LB555, etc. The model of the positioning module 21 may be AG3352Q, etc. The communication module 31 may be a Bluetooth module, and the model of the Bluetooth module is N52832-QFN48. The first antenna 22, the second antenna 32 and / or the third antenna 40 may be patch antennas.

[0045] It should be noted that ANT is a wireless transmission protocol for communication between devices. ANT+ is an ultra-low power version of the ANT transmission protocol; that is, ANT+ runs on top of the ANT protocol.

[0046] In this embodiment, the first antenna 22 receives the positioning signal and sends it to the positioning module 21. The positioning module 21 calculates the position data based on the positioning signal and then sends the position data to the main control module 10. At the same time, the main control module 10 transmits a Bluetooth signal through the Bluetooth module to transmit the position data to the device. The main control module 10 can communicate with the mobile device through the third antenna 40. In this way, the second antenna 32 and the third antenna 40 can each independently transmit signals without interfering with each other, avoiding signal instability.

[0047] Refer to the attached Figure 1 As shown, in some embodiments, the positioning unit 20 includes a first filter 23, a low-noise amplifier 24, and a second filter 25. The first filter 23, the low-noise amplifier 24, and the second filter 25 are connected in series between the first antenna 22 and the positioning module 21 in sequence.

[0048] Exemplarily, the models of the first filter 23 and the second filter 25 can both be SAFEB1G57KE0F00, etc. The model of the low-noise amplifier 24 can be MXDLN16TP_DS, etc.

[0049] In this embodiment, after the first antenna 22 receives the positioning signal, the first filter 23 is used to perform the first-stage filtering process on the positioning signal and send the positioning signal to the low-noise amplifier 24. The low-noise amplifier 24 is used to amplify the positioning signal and send the positioning signal to the second filter 25. The second filter 25 is used to perform the second-stage filtering process. In this way, the positioning signal is amplified and filtered, which is beneficial for the positioning module 21 to accurately identify the positioning signal and facilitates the operation of the positioning module 21.

[0050] Refer to the attached Figure 1 As shown, in some embodiments, the communication unit 30 includes a program download and debugging port 33, and the program download and debugging port 33 is electrically connected to the communication module 31.

[0051] In this embodiment, the program download and debugging port 33 is connected to an external device, and the main control module 10 can be debugged by downloading a program.

[0052] Refer to the attached Figure 1 As shown, in some embodiments, the communication unit 30 includes a radio frequency test port 34, and the radio frequency test port 34 is electrically connected to the communication module 31.

[0053] In this embodiment, the RF test port 34 is connected to an external device, and the main control module 10 can be tested at a fixed frequency.

[0054] Refer to the appendix Figure 1 As shown, in some embodiments, there are two clock units 50, and the two clock units 50 are electrically connected to the positioning module 21 and the communication module 31 in a one-to-one correspondence.

[0055] Exemplarily, the crystal oscillator circuit 51 can be an active crystal oscillator circuit, etc.; please refer to the appendix Figure 2 As shown, the active crystal oscillator circuit is a prior art, so the working principle of the active crystal oscillator circuit will not be described in detail here. The model of the crystal oscillator 52 can be 2TG2600001, etc. The clock unit can be a clock module. For example, the model of the clock module can be DS1302, etc.; alternatively, the clock unit 50 can include the crystal oscillator circuit 51 and the crystal oscillator 52.

[0056] In this embodiment, the crystal oscillator circuit 51 and the crystal oscillator 52 generate a clock frequency, so that the crystal oscillator circuit 51 and the crystal oscillator 52 can provide accurate time to the positioning module 21 and the communication module 31.

[0057] Refer to the appendix Figure 3 and 4 As shown, in some embodiments, the first antenna 22 includes a first conductive sheet 221, a first impedance matching circuit 222, and a bidirectional diode 223. The first conductive sheet 221 has a first feed point 2211 and a second feed point 2212. The first impedance matching circuit 222 includes a first resistor 2221 and a first capacitor 2222. The first resistor 2221 is connected in series between the first feed point 2211 and the input end of the positioning module 21. One end of the first capacitor 2222 is connected in parallel to the end of the first resistor 2221 far from the first feed point 2211, and the other end of the first capacitor 2222 is grounded. The second feed point 2212 is grounded. The second end of the bidirectional diode 223 is connected in parallel between the first feed point 2211 and the first resistor 2221, and the first end of the bidirectional diode 223 is grounded.

[0058] Exemplarily, the first conductive sheet 221 is a steel sheet, etc.

[0059] In this embodiment, the bidirectional diode 223 serves as an ESD protection device to prevent static electricity from entering the positioning module 21 through the first conductive sheet 221. Furthermore, electrostatic protection can be achieved for the positioning module 21 to prevent damage to the positioning module 21. The first impedance matching circuit 222 serves as the matching network of the first antenna 22, thereby playing the role of impedance matching. After the first conductive sheet 221 receives the positioning signal, impedance matching is performed between the characteristic impedance of the first impedance matching circuit 222 and the input impedance of the first conductive sheet 221 to reduce signal attenuation. And through the miniaturization design of the first conductive sheet 221, and then through the cooperation of the first impedance matching circuit 222 and the bidirectional diode 223 with the first conductive sheet 221, it is possible to install in a narrow space, reduce space occupation, and achieve signal reception.

[0060] Referring to the appendix Figure 5 and 6 As shown, in some embodiments, the second antenna 32 includes a second conductive sheet 321 and a second impedance matching circuit 322. The second conductive sheet 321 has a third feeding point 3211 and a fourth feeding point 3212. The second impedance matching circuit 322 includes a second resistor 3221, a third resistor 3222, a second capacitor 3223, a third capacitor 3224, and a fourth capacitor 3225. The second resistor 3221 and the third resistor 3222 are sequentially connected in series between the output end of the communication module 31 and the third feeding point 3211. One end of the second capacitor 3223 is connected in parallel between the output end of the communication module 31 and the second resistor 3221. One end of the third capacitor 3224 is connected in parallel between the second resistor 3221 and the third resistor 3222. One end of the fourth capacitor 3225 is connected in parallel between the third resistor 3222 and the third feeding point 3211. The other ends of the second capacitor 3223, the third capacitor 3224, and the fourth capacitor 3225 are all grounded, and the fourth feeding point 3212 is grounded.

[0061] Exemplarily, the second conductive sheet 321 is a steel sheet or the like.

[0062] In this embodiment, the second impedance matching circuit 322 serves as the matching network of the second antenna 32, thereby playing the role of impedance matching. After the second conductive sheet 321 receives the positioning signal, impedance matching is performed between the characteristic impedance of the second impedance matching circuit 322 and the input impedance of the second conductive sheet 321 to reduce signal attenuation. And through the miniaturization design of the second conductive sheet 321, and then through the cooperation of the second impedance matching circuit 322 with the second conductive sheet 321, it is possible to install in a narrow space, reduce space occupation, and achieve signal reception.

[0063] Referring to the appendix Figure 7 and 8As shown, in some embodiments, the third antenna 40 includes a third conductive sheet 41 and a third impedance matching circuit 42. The third conductive sheet 41 has a fifth feeding point 411 and a sixth feeding point 412. The third impedance matching circuit 42 includes a fifth capacitor 421, a fourth resistor 422, a sixth capacitor 423, a fifth resistor 424, a seventh capacitor 425, and an eighth capacitor 426. The fifth capacitor 421 and the fourth resistor 422 are sequentially connected in series between the output end of the main control module 10 and the fifth feeding point 411. One end of the sixth capacitor 423 is connected in parallel between the output end of the main control module 10 and the fifth capacitor 421. The fifth resistor 424 and the seventh capacitor 425 are sequentially connected in series, and the other end of the fifth resistor 424 is connected in parallel between the fifth capacitor 421 and the fourth resistor 422. One end of the eighth capacitor 426 is connected in parallel between the fifth resistor 424 and the fifth feeding point 411. The other ends of the sixth capacitor 423, the seventh capacitor 425, and the eighth capacitor 426 are all grounded, and the sixth feeding point 412 is grounded.

[0064] Exemplarily, the third conductive sheet 41 is a steel sheet or the like.

[0065] According to this embodiment, the third impedance matching circuit 42 serves as the matching network of the third antenna 40, thereby playing the role of impedance matching. After the third conductive sheet 41 receives the positioning signal, impedance matching is performed between the characteristic impedance of the third impedance matching circuit 42 and the input impedance of the third conductive sheet 41 to reduce signal attenuation. And through the miniaturization design of the third conductive sheet 41, and then through the cooperation of the third impedance matching circuit 42 and the third conductive sheet 41, it can be installed in a narrow space, reducing space occupation, and can also realize signal reception.

[0066] The present utility model further provides a technical solution: a code meter, in which the above-mentioned communication positioning circuit is provided.

[0067] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A communication positioning circuit, characterized in that, Comprising: A main control module (10); A positioning unit (20), comprising a positioning module (21) and a first antenna (22), the positioning module (21) being electrically connected to the main control module (10), the first antenna (22) being electrically connected to the positioning module (21), and the first antenna (22) being configured to receive positioning signals; A communication unit (30), comprising a communication module (31) and a second antenna (32), the communication module (31) being electrically connected to the main control module (10), the second antenna (32) being electrically connected to the communication module (31), and the second antenna (32) being configured to transmit Bluetooth signals; A third antenna (40), electrically connected to the main control module (10), the third antenna (40) being configured to transmit ANT+ signals.

2. The communication positioning circuit according to claim 1, wherein The positioning unit (20) includes a first filter (23), a low-noise amplifier (24), and a second filter (25), and the first filter (23), the low-noise amplifier (24), and the second filter (25) are connected in series in sequence between the first antenna (22) and the positioning module (21).

3. The communication positioning circuit according to claim 1, wherein The communication unit (30) includes a program download and debugging port (33), and the program download and debugging port (33) is electrically connected to the communication module (31).

4. The communication positioning circuit according to claim 3, wherein The communication unit (30) includes a radio frequency test port (34), and the radio frequency test port (34) is electrically connected to the communication module (31).

5. The communication positioning circuit according to claim 1, characterized in that, Including two clock units (50), and the two clock units (50) are electrically connected to the positioning module (21) and the communication module (31) in a one-to-one correspondence.

6. The communication positioning circuit according to claim 5, wherein, The clock unit (50) includes a crystal oscillator circuit (51) and a crystal oscillator (52).

7. The communication positioning circuit according to claim 1, characterized in that The first antenna (22) includes a first conductive sheet (221), a first impedance matching circuit (222), and a bidirectional diode (223). The first conductive sheet (221) has a first feed point (2211) and a second feed point (2212). The first impedance matching circuit (222) includes a first resistor (2221) and a first capacitor (2222). The first resistor (2221) is connected in series between the first feed point (2211) and the input end of the positioning module (21). One end of the first capacitor (2222) is connected in parallel to the end of the first resistor (2221) away from the first feed point (2211). The other end of the first capacitor (2222) is grounded. The second feed point (2212) is grounded. The second end of the bidirectional diode (223) is connected in parallel between the first feed point (2211) and the first resistor (2221), and the first end of the bidirectional diode (223) is grounded.

8. The communication positioning circuit according to claim 1, wherein, The second antenna (32) includes a second conductive sheet (321) and a second impedance matching circuit (322). The second conductive sheet (321) has a third feeding point (3211) and a fourth feeding point (3212). The second impedance matching circuit (322) includes a second resistor (3221), a third resistor (3222), a second capacitor (3223), a third capacitor (3224), and a fourth capacitor (3225). The second resistor (3221) and the third resistor (3222) are sequentially connected in series between the output end of the communication module (31) and the third feeding point (3211). One end of the second capacitor (3223) is connected in parallel between the output end of the communication module (31) and the second resistor (3221). One end of the third capacitor (3224) is connected in parallel between the second resistor (3221) and the third resistor (3222). One end of the fourth capacitor (3225) is connected in parallel between the third resistor (3222) and the third feeding point (3211). The other ends of the second capacitor (3223), the third capacitor (3224), and the fourth capacitor (3225) are all grounded. The fourth feeding point (3212) is grounded.

9. The communication positioning circuit according to claim 1, wherein The third antenna (40) includes a third conductive sheet (41) and a second impedance matching circuit (322). The third conductive sheet (41) has a fifth feeding point (411) and a sixth feeding point (412). The second impedance matching circuit (322) includes a fifth capacitor (421), a fourth resistor (422), a sixth capacitor (423), a fifth resistor (424), a seventh capacitor (425), and an eighth capacitor (426). The fifth capacitor (421) and the fourth resistor (422) are sequentially connected in series between the output end of the main control module (10) and the fifth feeding point (411). One end of the sixth capacitor (423) is connected in parallel between the output end of the main control module (10) and the fifth capacitor (421). The fifth resistor (424) and the seventh capacitor (425) are sequentially connected in series. The other end of the fifth resistor (424) is connected in parallel between the fifth capacitor (421) and the fourth resistor (422). One end of the eighth capacitor (426) is connected in parallel between the fifth resistor (424) and the fifth feeding point (411). The other ends of the sixth capacitor (423), the seventh capacitor (425), and the eighth capacitor (426) are all grounded. The sixth feeding point (412) is grounded.

10. A code table, characterized in that, The communication positioning circuit according to any one of claims 1 to 9 is provided within the code table.

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