Distance measuring circuit board and distance measuring device

Abstract

The invention provides a distance measurement circuit board and a distance measurement device, and relates to the technical field of distance measurement. A control chip, a wireless communication circuit, a power conversion circuit, a signal acquisition circuit and a signal restoration circuit are integrated on the ranging circuit board, and an electric data receiving pin and a data sending pin of the wireless communication circuit are both connected with the control chip; the voltage input end of the power conversion circuit is connected with an external power supply; a first voltage output end of the power conversion circuit is connected with a voltage input pin of the control chip and a voltage input pin of the wireless communication circuit; when the ranging circuit board is used for ranging at the transmitting end, the signal output end of the signal acquisition circuit is connected with the signal input and output pin of the control chip; when the ranging circuit board is used for receiving ranging processing, the signal input end of the signal restoration circuit is connected with the signal input and output pin of the control chip. According to the distance measuring circuit board and the distance measuring device provided by the embodiment of the invention, the distance measuring device is higher in adaptability and lower in cost.

Description

Technical Field

[0001] The embodiments of the present application relate to, but are not limited to, the field of ranging technology, and particularly relate to a ranging circuit board and a ranging device. Background Art

[0002] The ranging device realizes professional surveying and mapping operations by displaying the ranging data of the ranging wheel on the radar. Professional surveying and mapping operations include measurements and evaluations in construction operations such as road engineering, pipeline laying projects, and wire and cable projects. In related technologies, the ranging device often connects the ranging wheel and the radar in a wired manner. When measuring and evaluating railway tracks, the ranging device has poor usability and poor adaptability. And customizing the design of the ranging device for railway tracks will lead to an increase in ranging costs. Based on this, there is an urgent need for a ranging device with stronger ranging adaptability and lower costs. Summary of the Invention

[0003] The following is an overview of the subject matter described in detail in this article. This overview is not intended to limit the scope of protection of the claims. The embodiments of the present application provide a ranging circuit board and a ranging device, which can make the ranging device have higher adaptability and lower costs.

[0004] In a first aspect, a ranging circuit board according to an embodiment of the present application, on which are integrated: A control chip; A wireless communication circuit, where the data receiving pin and the data sending pin of the wireless communication circuit are both connected to the control chip; A power conversion circuit, where the voltage input terminal of the power conversion circuit is connected to an external power supply; the first voltage output terminal of the power conversion circuit is connected to the voltage input pin of the control chip and the voltage input pin of the wireless communication circuit; A signal acquisition and restoration circuit, where the signal acquisition and restoration circuit includes a signal acquisition circuit and a signal restoration circuit; Among them, when the ranging circuit board is used for ranging processing at the transmitting end, the signal output terminal of the signal acquisition circuit is connected to the signal input / output pin of the control chip, and the signal acquisition circuit is used to acquire the level signal data of the ranging wheel; Among them, when the ranging circuit board is used for ranging processing at the receiving end, the signal input terminal of the signal restoration circuit is connected to the signal input / output pin of the control chip; the signal restoration circuit is used to restore the signal output by the signal output pin to obtain the level signal data.

[0005] Second aspect, a ranging device according to an embodiment of the present application, the ranging device includes a receiving module and a transmitting module, both the receiving module and the transmitting module include the ranging circuit board as described in the first aspect, the receiving module is used for performing receiving-end processing on ranging data, and the transmitting module is used for performing transmitting-end processing on ranging data.

[0006] Therefore, the above embodiments of the present application at least have the following beneficial effects: By integrating the circuit modules for transmitting-end processing and receiving-end processing on a single ranging circuit board, it is possible to eliminate the need for customized production based on different circuit functions for transmission and reception during the production process of the ranging circuit board. After the circuit board printing is completed, the power conversion circuit, signal acquisition circuit, signal restoration circuit, etc. are electrically connected according to actual requirements, resulting in higher production efficiency and thus cost reduction. Secondly, through the control chip, wireless communication circuit, power conversion circuit, and signal acquisition and restoration circuit, it is possible to make the reception and transmission of the ranging device be divided into two independent parts, and thus it can be adapted to more application scenarios. Therefore, compared with the related art, the embodiments of the present application can make the ranging device have higher adaptability and lower cost. Description of the Drawings

[0007] The drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solutions of the present application, and do not constitute a limitation to the technical solutions of the present application.

[0008] Figure 1 It is a schematic diagram of the modules of the ranging circuit board provided by the present application; Figure 2 It is a schematic diagram of the circuit principle of the wireless communication circuit of an embodiment of the ranging circuit board provided by the present application; Figure 3a It is a schematic diagram of the circuit principle of the control chip of an embodiment of the ranging circuit board provided by the present application Figure 3b It is a schematic diagram of the circuit principle of the display circuit of an embodiment of the ranging circuit board provided by the present application; Figure 3c It is a schematic diagram of the circuit principle of the switch control of an embodiment of the ranging circuit board provided by the present application; Figure 4 It is a schematic diagram of the circuit principle of the power consumption control circuit of an embodiment of the ranging circuit board provided by the present application; Figure 5 It is a schematic diagram of the modules of an embodiment of the ranging circuit board provided by the present application; Figure 6a It is a schematic diagram of the circuit principle of the buck-boost circuit of an embodiment of the ranging circuit board provided by the present application Figure 6bIt is a schematic diagram of the circuit principle of the boost circuit in an embodiment of the ranging circuit board provided by this application; Figure 6c It is a schematic diagram of the circuit principle of the buck circuit in an embodiment of the ranging circuit board provided by this application; Figure 7a It is a partial schematic diagram of the circuit principle of the signal acquisition circuit in an embodiment of the ranging circuit board provided by this application Figure 7b It is a partial schematic diagram of the circuit principle of the signal acquisition circuit in an embodiment of the ranging circuit board provided by this application; Figure 7c It is a schematic diagram of the circuit principle of the signal restoration circuit in an embodiment of the ranging circuit board provided by this application; Figure 8a It is a schematic diagram of the circuit principle of the charging circuit in an embodiment of the ranging circuit board provided by this application Figure 8b It is a schematic diagram of the circuit principle of the charge-discharge protection circuit in an embodiment of the ranging circuit board provided by this application; Figure 9 It is a module schematic diagram of an embodiment of the ranging device provided by this application.

[0009] Reference numerals: Control chip 110, wireless communication circuit 120, power conversion circuit 130, buck-boost circuit 131, boost circuit 132, buck circuit 133, signal acquisition and restoration circuit 140, signal acquisition circuit 141, signal restoration circuit 142, charging circuit 151, charge-discharge protection circuit 152, Transmitting module 200, Receiving module 300. Detailed implementation manners

[0010] In order to make the objectives, technical solutions and advantages of this application clearer, the following further details this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0011] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application. Terms such as "first", "second", "third", "fourth", etc. (if any) in the specification and the above accompanying drawings of this application are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence.

[0012] In addition, the described features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be employed. In other cases, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the present disclosure.

[0013] The ranging device realizes professional surveying and mapping operations by displaying the ranging data of the ranging wheel on the radar. Professional surveying and mapping operations include measurements and evaluations of construction operations such as road engineering, pipeline laying projects, and wire and cable projects. In related technologies, the ranging device often connects the ranging wheel and the radar in a wired manner, and the ranging wheel and the structure carrying the radar are physically connected. Although the physical structures of the ranging wheel and the structure carrying the radar can also be divided into two independent devices, the signal transmission between the two still depends on the cable. Therefore, when measuring and evaluating railway tracks, the ranging device has poor usability and poor adaptability. And customizing the design of the ranging device for railway tracks will lead to an increase in ranging costs. Based on this, there is an urgent need for a ranging device with stronger ranging adaptability and lower costs. Based on this, the embodiments of the present application provide a ranging circuit board and a ranging device, which can make the ranging device have higher adaptability and lower costs.

[0014] Referring to Figure 1 As shown, the embodiments of the present application provide a ranging circuit board, which is integrated with: A control chip 110; A wireless communication circuit 120, and both the data receiving pin and the data sending pin of the wireless communication circuit 120 are connected to the control chip 110; A power conversion circuit 130, the voltage input end of the power conversion circuit 130 is connected to an external power supply; the first voltage output end of the power conversion circuit 130 is connected to the voltage input pin of the control chip 110 and the voltage input pin of the wireless communication circuit 120; A signal acquisition and restoration circuit 140, the signal acquisition and restoration circuit 140 includes a signal acquisition circuit 141 and a signal restoration circuit 142; Among them, when the ranging circuit board is used for ranging processing at the transmitting end, the signal output end of the signal acquisition circuit 141 is connected to the signal input / output pin of the control chip 110, and the signal acquisition circuit 141 is used to acquire the level signal data of the ranging wheel; Among them, when the ranging circuit board is used for ranging processing at the receiving end, the signal input end of the signal restoration circuit 142 is connected to the signal input / output pin of the control chip 110; the signal restoration circuit 142 is used to restore the signal output from the signal output pin to obtain the level signal data.

[0015] Therefore, by integrating the circuit modules for transmitter processing and receiver processing on a ranging circuit board, it is possible to avoid customized production based on different circuit functions for transmission and reception during the production process of the ranging circuit board. After the circuit board printing is completed, the power conversion circuit 130, signal acquisition circuit 141, signal restoration circuit 142, etc. are electrically connected according to actual needs, resulting in higher production efficiency and thus cost reduction. Secondly, through the control chip 110, wireless communication circuit 120, power conversion circuit 130, and signal acquisition and restoration circuit 140, the reception and transmission of the ranging device can be separated into two independent parts, and thus more application scenarios can be adapted. Therefore, compared with the related art, the embodiments of the present application can make the ranging device more adaptable and lower in cost.

[0016] In the embodiments of the present application, the signal acquisition circuits 141 connected to the control chip 110 correspond one-to-one to the number of ranging wheels, and the number of ranging wheels can be selectively set according to actual needs. For example, for a ranging device with four wheels, only one of the four wheels needs to be set as a ranging wheel for measurement, and then one signal acquisition circuit 141 needs to be set. Similarly, for multi-wheel ranging devices with three wheels or two wheels, the corresponding number of signal acquisition circuits 141 can be set to be connected to the control chip 110 according to the number of ranging wheels required by actual needs.

[0017] It should be noted that, in some embodiments, an enable switch can be respectively set to dynamically control the connection relationship of the circuits corresponding to the functions of the transmitter end of the ranging circuit board and the connection relationship of the circuits corresponding to the functions of the receiver end. In other embodiments, the corresponding connection points of each circuit can also be circuit-connected through a zero-ohm resistor or the like according to the functions implemented by the ranging circuit board. In this regard, the embodiments of the present application do not limit the manner in which each of the above modules is electrically connected.

[0018] It should be noted that by integrating the circuit modules related to transmission and reception on one circuit board, the packaging structure of the circuit board can also be made consistent, thereby reducing the production cost.

[0019] It should be noted that the wireless communication circuit 120 can implement short-range wireless transmission such as Bluetooth. Exemplarily, taking Bluetooth transmission as an example, the wireless communication circuit 120 includes an antenna and a Bluetooth chip. As Figure 2 shown, the Bluetooth chip is U2, with the model number ASR5601ACL; the voltage input pin VBATA of U2 (i.e., Figure 2 the 8th pin shown) is connected to the first voltage output terminal of the power conversion circuit 130. The RF pin RF0 of U2 (i.e., Figure 2Pin 1 of the first component is connected to antenna RF1. The data transmission pin P02 / TX and the data reception pin P03 / RX of U2 are connected to control chip 110. It should be noted that, in some other embodiments, a second connection terminal is provided on the ranging circuit board, as Figure 2 shown, the two data terminals of the second connection terminal are respectively connected to the data transmission pin P04 / TX of U2 (i.e., Figure 2 Pin 9 of the first component) and the data reception pin P05 / RX of U2 (i.e., Figure 2 Pin 10 of the first component), so that U2 can be configured through the second connection terminal.

[0020] Exemplarily, referring to Figure 3a shown, control chip 110 is U1, and the model of U1 is set to STM32L431CCU6; among them, there are 4 groups of signal input and output pins of U1, and the 4 groups are pins 45 and 46, pins 42 and 43, pins 40 and 41, and pins 39 and 38 respectively. The input and output of signals are realized through each group of pins. The voltage input pin VBAT of U1 is connected to the first voltage output terminal of the power conversion circuit 130. It can be understood that, in some embodiments, the ranging circuit board is also provided with a display circuit and a switch control circuit, as Figure 3b shown, the display circuit includes two first light-emitting diodes LED1 and LED2, and the first ends of the two first light-emitting diodes LED1 and LED2 are connected to the voltage output pin of control chip 110. Combining Figure 3a shown, the second ends of the two first light-emitting diodes LED1 and LED2 are respectively connected to the first control pin RUN1 and the second control pin RUN2 of U1. As Figure 3c shown, the switch control circuit includes a control switch SW1. As Figure 3a and 3c shown, the first end of control switch SW1 is grounded, and the second end of control switch SW1 is connected to the detection pin PB0 of control chip 110 to control whether the ranging circuit board works normally based on the switch state of SW1. It can be understood that the two first light-emitting diodes LED1 and LED2 can be used to indicate the working state of the Bluetooth chip, the signal processing state, etc. In this regard, the embodiments of the present application can selectively set the functions of LED1 and LED2 according to actual needs. It should be noted that, in actual applications, components such as resistors R6, R7, and R2, and capacitor C10 as Figure 3b and 3c shown can be selectively added according to actual needs.

[0021] It can be understood that, referring to Figure 4As shown, a power consumption control circuit is also integrated on the ranging circuit board. The power consumption control circuit includes a first resistor and a second resistor connected in sequence. A first connection terminal is provided between the second terminal of the first resistor and the first terminal of the second resistor, and a second connection terminal is provided at the second terminal of the second resistor; Wherein, when the ranging circuit board is used for ranging processing at the transmitting end, the external power supply is set as a battery. The first terminal of the first resistor is connected to the positive terminal of the external power supply. Both the first connection terminal and the second connection terminal are connected to the control chip 110. The control chip 110 is used to enable or disable the second connection terminal to control the leakage current generated by the battery.

[0022] By adding a power consumption control circuit, when there is no need to collect level signal data, the control chip 110 can control the leakage current of the battery, so that when it is necessary to collect level signal data, the battery generates leakage current to realize the normal collection of level signal data. When it is not necessary to collect level signal data, the battery stops leaking current, thus realizing the dynamic energy saving of the ADC.

[0023] Exemplarily, as Figure 4 and Figure 3a shown, the control chip 110 is U1, the first resistor is R8, the second resistor is R9. The first connection terminal between R8 and R9 is connected to the sampling input pin ADCIN0 of U1 (that is, Figure 3a pin 10 in Figure 3a ), and the second terminal of R9 is connected to the control enable pin ADCEN of U1 (that is, Figure 4 pin 11 in

[0024] Understandably, as Figure 5 shown, the power conversion circuit 130 includes a buck-boost circuit 131, a boost circuit 132, and a buck circuit 133. Wherein, when the ranging circuit board is used for ranging processing at the transmitting end, the voltage input terminal of the buck-boost circuit 131 is connected to the positive pole of the battery, and the voltage output terminal of the buck-boost circuit 131 is connected to the voltage input pin of the control chip 110 and the voltage input pin of the wireless communication circuit 120; the voltage input terminal of the boost circuit 132 is connected to the positive pole of the battery, and the voltage output terminal of the boost circuit 132 is connected to the voltage input terminal of the signal acquisition circuit 141; wherein, when the ranging circuit board is used for ranging processing at the receiving end, the voltage input terminal of the buck circuit 133 is connected to the external power supply, and the voltage output terminal of the buck circuit 133 is connected to the voltage input pin of the control chip 110 and the voltage input pin of the wireless communication circuit 120.

[0025] In some embodiments, the ranging wheel, the control chip 110, the radar, the Bluetooth chip, etc. have different voltage requirements. Therefore, by setting the buck-boost circuit 131, the boost circuit 132, and the buck circuit 133, it is possible to meet various power supply requirements when using the same external power supply at the receiving end and various power supply requirements when using the same external power supply at the transmitting end, thereby making the overall structure of the ranging device simpler. The buck-boost circuit 131 can improve the power supply stability of the control chip 110 and the wireless communication circuit 120.

[0026] It can be understood that the buck-boost circuit 131, the boost circuit 132, and the buck circuit 133 can be electrically connected to other circuit modules by means of an enable switch or a zero-ohm resistor.

[0027] It can be understood that, with reference to Figure 6a As shown, the buck-boost circuit 131 includes a buck-boost chip, a third resistor, and a fourth resistor. The first end of the third resistor is connected to the voltage output pin of the buck-boost chip. The voltage output pin of the buck-boost chip is connected to the voltage input pin of the control chip 110 and the voltage input pin of the wireless communication circuit 120. The second end of the third resistor is connected to the first end of the fourth resistor. The first end of the fourth resistor is connected to the voltage feedback pin of the buck-boost chip. The second end of the fourth resistor is grounded. The third resistor is used to control the leakage current of the buck-boost chip.

[0028] It should be noted that by increasing the third resistor, the leakage current of the buck-boost chip can be controlled, thereby reducing the power consumption.

[0029] Exemplarily, as Figure 6a shown, the buck-boost chip is U5, and the model is CS5518T. The voltage input pin VIN of U5 is connected to the positive pole of the battery. The voltage output pin VOUT of U5 is connected to the first end of the third resistor R48 and then connected to the voltage input pin VBAT of U1 and VBATA of U2 through a zero-ohm resistor R44 (in some embodiments, an enable switch can also be used). The second end of R48 is connected to the voltage feedback pin FB of U5. The second end of R48 is connected to the first end of the fourth resistor R55. The second end of R55 is grounded. It should be noted that the buck-boost circuit 131 may also include other components. In this regard, the embodiments of the present application will not be elaborated one by one, and those skilled in the art can selectively set them according to actual needs.

[0030] It should be noted that in some embodiments, as Figure 6bAs shown, the boost circuit 132 includes a boost chip and a second diode. The voltage input pin VCC of the boost chip is connected to the battery, and the enable terminal of the boost chip is connected to the third control pin PA12 of the control chip 110 to control whether the boost chip supplies power to the ranging wheel through U1, so that power consumption can be saved when signal acquisition is not required. As Figure 6b shown, the boost chip is set as U7. The voltage output pin LX of U7 is connected to the first end of the second diode D4, and the second end of the second diode is used as the output end and is connected to the voltage output pin of the signal acquisition circuit 141 through a zero-ohm resistor R46 (an enable switch can also be used in some other embodiments); the voltage output pin of the signal acquisition circuit 141 is connected to the ranging wheel.

[0031] It should be noted that, in some embodiments, as Figure 6c shown, the buck-boost circuit 131 includes a buck chip U6. The voltage input pin of U6 is connected to an external power supply, and this external power supply supplies power to the radar at the same time. The voltage output pin SW of U6 is connected to the signal restoration circuit 142 through a zero-ohm resistor R45 (an enable switch can also be used in some other embodiments).

[0032] It should be noted that the above buck-boost circuit 131, buck-boost circuit 131, and boost circuit 132 are only examples for illustration in this application. It should be noted that, referring to as Figures 6a - 6c shown, to further reduce power consumption, low-power chips are selected for the boost chip, buck chip, and buck-boost chip. For example, the boost chip is FP6291, the buck chip is MP1470, and the buck-boost chip is CS5518T.

[0033] It can be understood that, as Figure 7a and 7b shown, there are multiple signal acquisition circuits 141. Each signal acquisition circuit 141 is provided with two signal output terminals; each signal acquisition circuit 141 includes a first connection terminal, a first branch, and a second branch. The first ends of the first branch and the second branch are respectively connected to the first pin and the second pin of the first connection terminal, and the second ends of the first branch and the second branch are both grounded. The first branch and the second branch are both provided with multiple fifth resistors connected in series. One signal output terminal is located between two of the fifth resistors in the first branch; the other signal output terminal is located between two of the fifth resistors in the second branch.

[0034] The first connection terminal is used to connect the ranging wheel.

[0035] It should be noted that the number of signal acquisition circuits 141 connected to the control chip 110 can be selected according to needs, and the embodiments of the present application do not limit this. For example, if there are multiple ranging wheels (such as 2 or 4) provided on the ranging device, then the signal acquisition circuits 141 with the same number as the number of ranging wheels are connected to the control chip 110. At this time, during the ranging process, multiple measurement data can be obtained at the same position point, and the average value of the multiple measurement data is used as the measurement data of the ranging device at this position, so as to further improve the accuracy of the collected measurement data when turning or measuring on an uneven road surface.

[0036] It should be noted that the embodiments of the present application do not limit the number of fifth resistors on the first branch and the second branch, and those skilled in the art can selectively set them according to actual needs. It should be noted that in some embodiments, the power supply pin of the first connection terminal is connected to the voltage output pin of the boost chip as the voltage output pin of the signal acquisition circuit 141, so as to supply power to the ranging wheel connected to the first connection terminal.

[0037] Exemplarily, such as Figure 7a and 7b As shown, there are four signal acquisition circuits 141. The first connection terminals of the four signal acquisition circuits 141 are J1, J3, J4, and J5 respectively. The power supply pins of J1, J3, J4, and J5 are connected to the voltage output pin of the boost chip to obtain a 12V voltage. As Figure 7a shown, the first pin of J1 (that is, Figure 7a the 3rd pin shown) and the second pin (that is, Figure 7a the 4th pin shown) are respectively connected to the first ends of the corresponding first branch and second branch. The first pins of J3, J4, and J5 (that is, Figure 7b the 3rd pin shown) and the second pins (that is, Figure 7b the 4th pin shown) are respectively connected to the first ends of the corresponding first branch and second branch; as Figure 7a shown, there are two fifth resistors R15 and R24 on the first branch of J1, and there are two fifth resistors R16 and R25 on the second branch of J1. As Figure 7b shown, there are two fifth resistors R17 and R26 on the first branch of J3, and there are two fifth resistors R18 and R27 on the second branch of J3. There are two fifth resistors R19 and R28 on the first branch of J4, and there are two fifth resistors R20 and R29 on the second branch of J4. There are two fifth resistors R21 and R30 on the first branch of J5, and there are two fifth resistors R22 and R31 on the second branch of J5. Combining Figure 3a, the signal output terminal on the first branch of J1 is connected to S1AI of U1; the signal output terminal on the second branch of J1 is connected to S1BI of U1. The signal output terminal on the first branch of J3 is connected to S2AI of U1; the signal output terminal on the second branch of J3 is connected to S2BI of U1. The signal output terminal on the first branch of J4 is connected to S3AI of U1; the signal output terminal on the second branch of J4 is connected to S3BI of U1. The signal output terminal on the first branch of J5 is connected to S4AI of U1; the signal output terminal on the second branch of J5 is connected to S4BI of U1.

[0038] It should be noted that an enable switch can be set at the connection between each signal acquisition circuit and the control chip 110, so as to realize dynamic control of the measurement under one ranging wheel or multiple ranging wheels, and thus more ranging scenarios can be adapted.

[0039] It should be noted that in some embodiments, such as Figure 7c shown, the signal restoration circuit 142 includes a third connection terminal J2, a third branch and a fourth branch. The power supply pin of the third connection terminal J2 (i.e., Figure 7c the pin No. 1 shown) is connected to the external power supply that powers the radar. The first pin and the second pin of the third connection terminal J2 are respectively connected to the signal output terminal S1AO of the third branch and the signal output terminal S1BO of the fourth branch. The third branch includes a first triode, and the fourth branch includes a second triode. Exemplarily, in combination with Figure 7c and Figure 3a shown, the first triode is Q1, the second triode is Q2. The base of Q1 is connected to S1AI of U1; the base of Q2 is connected to S1BI of U1; the emitters of Q2 and Q1 are grounded. The collector of Q1 is connected to a signal output terminal S1AO, and the collector of Q2 is connected to another signal output terminal S1BO. At this time, U1 controls the bases of Q1 and Q2 with the signal sent by the Bluetooth chip, so that the levels of the two signal output terminals change, and thus the radar connected to the third connection terminal can obtain the restored level signal.

[0040] It should be noted that in some embodiments, the signal restoration circuit 142 and the signal acquisition circuit 141 can share a selection switch, so that the ranging circuit board can select signal acquisition or signal restoration through U1 or an external control key.

[0041] It can be understood that, as Figure 5 shown, the ranging circuit board also integrates a charging circuit 151. The voltage input terminal of the charging circuit 151 is connected to the charging power supply, and the voltage output terminal of the charging circuit 151 is used to charge the external power supply when the ranging circuit board is the transmitting end for ranging processing.

[0042] It should be noted that the embodiment of the present application does not limit the structure of the charging circuit 151, and those skilled in the art can selectively set it according to actual needs. For example, in some embodiments, the charging circuit 151 includes a charging chip and a third diode. The first end of the third diode is connected to the charging power supply (in some embodiments, the first end of the third diode can be connected to a power interface, such as a USB port, etc. to achieve connection with the charging power supply). The second end of the third diode is connected to the voltage input pin of the charging chip, and the voltage output pin LX of the charging chip is connected to the battery. Exemplarily, as Figure 8a shown, the charging chip is U4, set to PW4203; the VIN pin of PW4203 is connected to the second end of the third diode D3, and the first end of D3 is connected to the charging power supply through a USB interface. In some embodiments, the charging circuit 151 further includes a third diode LED3. The first end of the third diode LED3 is connected to the ground, and the second end of LED3 is connected to the detection pin START of U4 to give a lighting prompt for the charging state of the battery.

[0043] It can be understood that, as shown in Figure 8b and Figure 5 shown, the ranging circuit board is also integrated with a charge and discharge protection circuit 152. The charge and discharge protection circuit 152 includes a first diode, a sixth resistor, and an undervoltage protection chip. The anode of the first diode is connected to the first end of the sixth resistor, the second end of the sixth resistor is connected to the voltage input pin of the undervoltage protection chip, and the ground pin of the undervoltage protection chip is used to connect to the negative pole of the external power supply when the ranging circuit board is performing ranging processing as a transmitting end. The cathode of the first diode is used to connect to the positive pole of the external power supply when the ranging circuit board is performing ranging processing as a transmitting end.

[0044] It should be noted that the embodiment of the present application does not limit the number of the first diodes and does not limit the model of the first diodes.

[0045] Exemplarily, as Figure 8b shown, the undervoltage protection chip is U3, two first diodes are provided, namely D1 and D2 respectively, and the sixth resistor is set to R13. Then, as Figure 8b shown, D1 and D2 are connected in series. The first end of D1 is connected to the positive pole of the battery, and the second end of D2 is connected to the first end of the sixth resistor R13; the second end of R13 is connected to the voltage input end of U3, and the voltage feedback end of U3 is connected to the negative pole of the battery. Taking U3 as IP3012A as an example, its undervoltage turn-off voltage is 2.5V - 2.8V, which has an adverse effect on the battery life. By increasing the first diode, the turn-off voltage can be increased. At this time, the turn-off voltage reaches about 3.4V, which can not only reduce the probability of excessive battery discharge but also ensure the power utilization rate as much as possible, so that the safety and utilization rate of battery use can reach a balance.

[0046] It is understandable that, with reference to Figure 9 As shown, a ranging device provided according to the present application includes a receiving module 300 and a transmitting module 200. Both the receiving module 300 and the transmitting module 200 include the above-mentioned ranging circuit board. The receiving module 300 is used for performing receiving-end processing on ranging data, and the transmitting module is used for performing transmitting-end processing on ranging data.

[0047] Therefore, by integrating the circuit modules for transmitting-end processing and receiving-end processing on one ranging circuit board, it is possible to avoid customized production based on different circuit functions for transmission and reception during the production process of the ranging circuit board. After the circuit board printing is completed, the power conversion circuit 130, the signal acquisition circuit 141, the signal restoration circuit 142, etc. are electrically connected according to actual requirements, resulting in higher production efficiency and thus cost reduction. Secondly, through the control chip 110, the wireless communication circuit 120, the power conversion circuit 130, and the signal acquisition and restoration circuit 140, the reception and transmission of the ranging device can be divided into two independent parts, and thus more application scenarios can be adapted. Therefore, compared with the related art, the embodiments of the present application can make the ranging device more adaptable and lower in cost.

[0048] It is understandable that the power conversion circuit 130 includes a buck-boost circuit 131, a boost circuit 132, and a buck circuit 133. The voltage input terminal of the buck circuit 133 of the receiving module 300 is connected to an external power supply through a zero-ohm resistor, and the voltage output terminal of the buck circuit 133 of the receiving module 300 is connected to the voltage input pin of the control chip 110; the voltage input terminals and output terminals of the buck-boost circuit 131 and the boost circuit 132 are both set to be floating.

[0049] It should be noted that, with reference to Figure 9 and Figure 5 As shown, since the voltages required by the radar and the control chip 110 are different, when the internal power supply of the radar is used as the external power supply to supply power to the receiving module 300, by connecting the voltage input terminal of the buck circuit 133 to the external power supply through a zero-ohm resistor and setting the voltage input terminals and output terminals of the buck-boost circuit 131 and the boost circuit 132 to be floating, it is possible to implement receiving-end processing on the same ranging single board. It is understandable that the external power supply corresponding to the transmitting module 200 is set as a battery. The buck-boost circuit 131 of the transmitting module 200 is connected to the positive pole of the battery through a zero-ohm resistor, and the voltage output terminal of the buck-boost circuit 131 is connected to the voltage input pin of the control chip 110; the voltage input terminal of the buck circuit 133 is set to be floating, and the voltage output terminal of the buck circuit 133 is connected to the voltage input pin of the control chip 110.

[0050] It should be noted that, with reference to Figure 9 and Figure 5As shown, the external power supply of the transmitting module 200 is a battery. Since the voltage required by the ranging wheel is different from that of the control chip 110, a boost circuit 132 needs to be provided to supply power to the ranging wheel, and the input of the control chip 110 can be made more stable through the buck-boost circuit 131.

[0051] Exemplarily, with reference to Figures 1 - 9 the ranging device according to the embodiment of the present application is described. The control chip 110 is U1; the ranging device includes a receiving module 300 and a transmitting module 200. Among them, as Figure 9 shown, the receiving module 300 is powered by the internal power supply of the radar, and the transmitting module 200 is powered by a battery. The internal power supply of the radar is 12V, which is connected to the voltage input pin of the buck chip U6. U6 steps down 12V to 3.3V and then supplies power to U1 and the Bluetooth chip U2. With reference to Figure 7c shown, the 12V external power supply is connected to U6 through the power supply pin of the third connection terminal J2 of the signal restoration circuit 142. For the receiving module 300, when U2 of the receiving module 300 receives the signal transmitted by U2 of the transmitting module 200, U2 of the receiving module 300 forwards it to U1 of the receiving module 300 through the data sending pin P02 / TX and the data receiving pin P03 / RX. U1 of the receiving module 300 converts the received data into a level signal through S1BI and S1AI and sends it to Q1 and Q2 of the signal restoration circuit 142, so that the radar can obtain the level signal data detected by the ranging wheel of the transmitting module 200. Similarly, for the transmitting module 200, the battery is connected as an external power supply to the voltage input pins of the buck-boost chip U5 and the boost chip U7. The voltage output pin of U5 is connected to the voltage input pin of U1 and the voltage input pin of U2 in the transmitting module 200, realizing the power supply to U1 and U2 in the transmitting module 200. The voltage output pin of the boost chip U7 is connected to the first connection terminals J1, J3, J4, and J5 of the signal acquisition circuit 141, so that the ranging wheel connected to J1, J3, J4, and J5 can be powered through J1, J3, J4, and J5. The two data terminals of the first connection terminal transmit the level signal data through the corresponding pins on U1, and thus can be sent to U2 of the receiving module 300 by U2 after being processed by U1.

[0052] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the above embodiments. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present application, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.

Claims

1. A ranging circuit board, characterized in that, The ranging circuit board integrates: A control chip; A wireless communication circuit, where the data receiving pin and the data sending pin of the wireless communication circuit are both connected to the control chip; A power conversion circuit, where the voltage input end of the power conversion circuit is connected to an external power supply; the first voltage output end of the power conversion circuit is connected to the voltage input pin of the control chip and the voltage input pin of the wireless communication circuit; A signal acquisition and restoration circuit, where the signal acquisition and restoration circuit includes a signal acquisition circuit and a signal restoration circuit; Among them, when the ranging circuit board is used for transmit - end ranging processing, the signal output end of the signal acquisition circuit is connected to the signal input / output pin of the control chip, and the signal acquisition circuit is used to acquire the level signal data of the ranging wheel; Among them, when the ranging circuit board is used for receive - end ranging processing, the signal input end of the signal restoration circuit is connected to the signal input / output pin of the control chip; the signal restoration circuit is used to restore the signal output from the signal output pin to obtain the level signal data.

2. The ranging circuit board according to claim 1, characterized in that The ranging circuit board also integrates a power consumption control circuit, where the power consumption control circuit includes a first resistor and a second resistor connected in sequence. A first connection end is provided between the second end of the first resistor and the first end of the second resistor, and a second connection end is provided at the second end of the second resistor; Among them, when the ranging circuit board is used for transmit - end ranging processing, the external power supply is set as a battery. The first end of the first resistor is connected to the positive electrode of the battery, and the first connection end and the second connection end are both connected to the control chip. The control chip is used to enable or disable the second connection end to control the leakage current generated by the battery.

3. The ranging circuit board according to claim 2, wherein The power conversion circuit includes a buck - boost circuit, a boost circuit, and a buck circuit; Among them, when the ranging circuit board is used for transmit - end ranging processing, the voltage input end of the buck - boost circuit is connected to the positive electrode of the battery, and the voltage output end of the buck - boost circuit is connected to the voltage input pin of the control chip and the voltage input pin of the wireless communication circuit; the voltage input end of the boost circuit is connected to the positive electrode of the battery, and the voltage output end of the boost circuit is connected to the voltage input end of the signal acquisition circuit; Among them, when the ranging circuit board is used for receive - end ranging processing, the voltage input end of the buck circuit is connected to the external power supply, and the voltage output end of the buck circuit is connected to the voltage input pin of the control chip and the voltage input pin of the wireless communication circuit.

4. The ranging circuit board according to claim 3, characterized in that, The buck - boost circuit includes a buck - boost chip, a third resistor, and a fourth resistor. The first end of the third resistor is connected to the voltage output pin of the buck - boost chip. The voltage output pin of the buck - boost chip is connected to the voltage input pin of the control chip and the voltage input pin of the wireless communication circuit. The second end of the third resistor is connected to the first end of the fourth resistor. The first end of the fourth resistor is connected to the voltage feedback pin of the buck - boost chip. The second end of the fourth resistor is grounded. The third resistor is used to control the leakage current of the buck - boost chip.

5. The ranging circuit board according to claim 1, characterized in that A plurality of the signal acquisition circuits are provided, and each of the signal acquisition circuits is provided with two signal output terminals; each of the signal acquisition circuits includes a first connection terminal, a first branch, and a second branch. The first ends of the first branch and the second branch are respectively connected to the first pin and the second pin of the first connection terminal. The second ends of the first branch and the second branch are both grounded. The first branch and the second branch are both provided with a plurality of fifth resistors connected in series. One of the signal output terminals is located between two of the fifth resistors in the first branch; the other signal output terminal is located between two of the fifth resistors in the second branch.

6. The ranging circuit board according to claim 1, characterized in that, The ranging circuit board is further integrated with a charging circuit. The voltage input terminal of the charging circuit is connected to a charging power supply, and the voltage output terminal of the charging circuit is used to charge the external power supply when the ranging circuit board performs ranging processing as a transmitting end.

7. The ranging circuit board according to claim 1, wherein The ranging circuit board is further integrated with a charge and discharge protection circuit. The charge and discharge protection circuit includes a first diode, a sixth resistor, and an undervoltage protection chip. The anode of the first diode is connected to the first end of the sixth resistor, the second end of the sixth resistor is connected to the voltage input pin of the undervoltage protection chip, the ground pin of the undervoltage protection chip is used to connect to the negative pole of the external power supply when the ranging circuit board performs ranging processing as a transmitting end, and the cathode of the first diode is used to connect to the positive pole of the external power supply when the ranging circuit board performs ranging processing as a transmitting end.

8. A ranging device, characterized in that, The ranging device includes a receiving module and a transmitting module. Both the receiving module and the transmitting module include the ranging circuit board as claimed in claim 1. The receiving module is used to perform receiving-end processing on ranging data, and the transmitting module is used to perform transmitting-end processing on ranging data.

9. The ranging device according to claim 8, wherein The power conversion circuit includes a buck-boost circuit, a boost circuit, and a buck circuit. The voltage input terminal of the buck circuit of the receiving module is connected to the external power supply through a zero-ohm resistor, and the voltage output terminal of the buck circuit of the receiving module is connected to the voltage input pin of the control chip; the voltage input terminals and output terminals of the buck-boost circuit and the boost circuit are both set to be floating.

10. The ranging device according to claim 9, characterized in that, The external power supply corresponding to the transmitting module is set as a battery. The buck-boost circuit of the transmitting module is connected to the positive pole of the battery through a zero-ohm resistor, and the voltage output terminal of the buck-boost circuit is connected to the voltage input pin of the control chip; the voltage input terminal of the buck circuit is set to be floating, and the voltage output terminal of the buck circuit is connected to the voltage input pin of the control chip.

Images