A high-precision three-coordinate measuring machine

Abstract

The utility model discloses a high accuracy three -coordinate measuring machine passes through signal acquisition circuit module accurate connection measuring probe, gathers the displacement signal of three coordinate directions specially, lays the foundation for high accuracy measurement, signal conditioning circuit module carries out amplification, filtering to the signal of gathering and so on, removes the noise interference, makes the signal more pure stable, accurately reflects displacement information, solves the problem of the poor measurement accuracy caused by signal interference, simultaneously, forms compact, efficient signal processing and transmission process between each module, signal acquisition is handled and is sent to main control circuit module after rapid regulation, and main control circuit generates drive control signal fast with efficient operation, and drive control circuit module controls coordinate axis movement in proper order, reduces signal waiting and processing time, and the efficient processing of main control circuit avoids measurement delay, effectively improves measurement speed, satisfies the demand of modern production to quick detection, solves the problem of the slow measurement of prior art.

Description

Technical Field

[0001] This utility model relates to the field of coordinate measurement technology, and in particular to a high-precision coordinate measuring machine. Background Technology

[0002] With the rapid development of modern manufacturing towards precision and high quality, the requirements for the inspection of the dimensional accuracy, shape accuracy, and positional accuracy of parts are becoming increasingly stringent. As an important metrology device that can accurately measure the three-dimensional spatial coordinates of objects, the high-precision coordinate measuring machine plays an indispensable role in many fields such as machinery manufacturing, automotive industry, aerospace, and electronic semiconductors.

[0003] However, traditional high-precision coordinate measuring machines have certain limitations in terms of measurement accuracy and measurement speed. In terms of measurement accuracy, the acquisition signal of the measuring probe is easily affected by external interference, and the accuracy of the signal processing circuit is limited, resulting in certain errors in the measurement results. In terms of measurement speed, the data processing speed of traditional measurement systems is slow, which cannot meet the needs of rapid inspection in large-scale production. Utility Model Content

[0004] In view of this, the present invention proposes a high-precision coordinate measuring machine, which can solve the defects of poor measurement accuracy and slow measurement speed in the existing technology.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A high-precision coordinate measuring machine includes a machine body and a circuit board disposed within the machine body, the circuit board comprising:

[0007] The signal acquisition circuit module is connected to the measuring probe of the measuring machine and is used to acquire the displacement signals of the measuring probe in three coordinate directions;

[0008] The signal conditioning circuit module is connected to the signal acquisition circuit module. It conditions the acquired displacement signal and sends the conditioned signal to the main control circuit module.

[0009] The main control circuit module is used to generate drive control signals based on the conditioned signals;

[0010] The drive control circuit module is connected to the drive devices of the three coordinate axes of the measuring machine, and is used to control the movement of each coordinate axis based on the drive control signal;

[0011] The power management circuit module is used to provide power outputs of different voltage levels to various circuit modules.

[0012] As a further optional solution for the high-precision coordinate measuring machine, the signal acquisition circuit module includes:

[0013] The displacement signal acquisition unit includes three displacement sensors, which correspond to the measuring probe in the X, Y, and Z coordinate directions, respectively, and are used to acquire the displacement signals of the measuring probe in the three coordinate directions.

[0014] The signal output interface is used to output the acquired displacement signal to the signal conditioning circuit module.

[0015] As a further optional solution for the high-precision coordinate measuring machine, the signal conditioning circuit module includes:

[0016] The signal processing unit is used to amplify and filter the received displacement and measurement signals.

[0017] The signal output unit is used to convert the amplified and filtered signal into a differential signal format and send it to the main control circuit module.

[0018] As a further optional solution for the high-precision coordinate measuring machine, the main control circuit module includes an STM32F103VC chip and its peripheral circuits.

[0019] As a further optional solution for the high-precision coordinate measuring machine, the drive control circuit module includes:

[0020] A digital processor circuit is used to control the motion of each coordinate axis based on drive control signals;

[0021] Position feedback circuit, used to provide real-time feedback of position information for each coordinate axis.

[0022] As a further optional solution for the high-precision coordinate measuring machine, the digital processor circuit includes an STM32G030K6 chip and its peripheral circuits, and the position feedback circuit includes an AM26LS32 chip and its peripheral circuits.

[0023] As a further optional solution for the high-precision coordinate measuring machine, the power management circuit module includes:

[0024] Battery pack, used to provide DC power;

[0025] Charging management circuitry is used for the safe management of the battery pack.

[0026] A voltage conversion circuit is used to convert the output voltage of the battery pack into the different voltages required by each module.

[0027] As a further optional solution for the high-precision coordinate measuring machine, the charging management circuit includes:

[0028] Overvoltage protection circuit, used to protect the battery pack from overvoltage.

[0029] Overcurrent protection circuit, used to protect the battery pack from overcurrent.

[0030] As a further optional solution for the high-precision coordinate measuring machine, the voltage conversion circuit includes a TPS54210 chip and its peripheral circuitry.

[0031] As a further optional feature of the high-precision coordinate measuring machine, the measuring machine also includes:

[0032] The communication circuit module is used to realize data transmission between the measuring machine and external devices.

[0033] The beneficial effects of this invention are as follows: By directly connecting to the measuring probe, it is specifically responsible for acquiring the displacement signals of the measuring probe in three coordinate directions. Its precise connection method and targeted design help improve the overall measurement accuracy. Simultaneously, conditioning the acquired displacement signals allows for amplification, filtering, and other processing to remove noise and interference components, enhancing the characteristics of the useful signal. The conditioned signal is purer and more stable, more accurately reflecting the actual displacement information, thus significantly improving measurement accuracy and solving the problem of poor measurement accuracy caused by signal interference in existing technologies. Furthermore, after the signal acquisition circuit module quickly acquires the displacement signal, the signal conditioning circuit module processes it promptly and provides the conditioned signal... The signal is rapidly sent to the main control circuit module, which quickly generates drive control signals based on the conditioned signal. The drive control circuit module then controls the movement of each coordinate axis according to the drive control signals. This compact and efficient signal processing and transmission process reduces the waiting and processing time between modules, thereby speeding up the entire measurement process. In addition, the main control circuit module can quickly generate drive control signals based on the conditioned signal. Its efficient computing and processing capabilities ensure that signal analysis and instruction generation are completed in a short time, avoiding measurement delays caused by slow processing speeds. This effectively improves the measurement speed, meets the needs of rapid detection in modern production, and solves the problem of slow measurement speed in existing technologies. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram illustrating the composition of a high-precision coordinate measuring machine according to the present invention.

[0036] Figure 2 This is a circuit diagram of the signal processing unit in this utility model;

[0037] Figure 3 This is a circuit diagram of the signal output unit in this utility model;

[0038] Figure 4 This is a circuit diagram of the main control circuit module in this utility model;

[0039] Figure 5 This is a circuit diagram of the digital processor circuit in this utility model;

[0040] Figure 6 This is a circuit diagram of the position feedback circuit in this utility model;

[0041] Figure 7 This is a circuit diagram of the overvoltage protection circuit in this utility model;

[0042] Figure 8 This is a circuit diagram of the overcurrent protection circuit in this utility model;

[0043] Figure 9 This is a circuit diagram of the voltage conversion circuit in this utility model. Detailed Implementation

[0044] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0045] refer to Figures 1 to 9 A high-precision coordinate measuring machine includes a signal acquisition circuit module, a signal conditioning circuit module, a main control circuit module, a drive control circuit module, a power management circuit module, and a communication circuit module, wherein:

[0046] A signal acquisition circuit module, connected to the measuring probe of the measuring machine, is used to acquire displacement signals of the measuring probe in three coordinate directions; in some embodiments, the signal acquisition circuit module includes:

[0047] The displacement signal acquisition unit includes three displacement sensors, which correspond to the measuring probe in the X, Y, and Z coordinate directions, respectively, and are used to acquire the displacement signals of the measuring probe in the three coordinate directions.

[0048] The signal output interface is used to output the acquired displacement signal to the signal conditioning circuit module.

[0049] Specifically, the displacement signal acquisition unit includes three displacement sensors corresponding to the X, Y, and Z coordinate directions of the measuring probe, respectively. This design allows the displacement information of the measuring probe in three-dimensional space to be captured comprehensively and meticulously. Each sensor focuses on one direction, avoiding mutual interference between displacement signals in different directions, thereby obtaining displacement data in their respective directions more accurately and laying the foundation for subsequent precise measurements. By acquiring displacement signals in the three coordinate directions by the three displacement sensors, the actual displacement of the measuring probe in space can be completely and realistically reproduced. Whether it is a small displacement change or a large movement, it can be accurately recorded, which helps to improve the measurement accuracy of the entire coordinate measuring machine.

[0050] A signal conditioning circuit module, connected to the signal acquisition circuit module, conditions the acquired displacement signal and sends the conditioned signal to the main control circuit module; in some embodiments, the signal conditioning circuit module includes:

[0051] The signal processing unit is used to amplify and filter the received displacement and measurement signals.

[0052] The signal output unit is used to convert the amplified and filtered signal into a differential signal format and send it to the main control circuit module.

[0053] Specifically, the signal processing unit amplifies the acquired displacement and measurement signals. In actual measurements, the signals acquired by the measuring probe are often weak and easily drowned out by noise interference. Amplification enhances the signal strength, making the useful signals more prominent and facilitating accurate analysis and processing by subsequent circuits, thereby improving signal availability and reliability. Simultaneously, the signal processing unit's filtering function selectively removes noise components from the signal. Various interference sources exist in the measurement environment, such as electromagnetic interference and mechanical vibration interference. These interferences mix into the measurement signal as noise. Precise filtering can remove noise within specific frequency ranges, retaining useful displacement and measurement signals, further improving signal purity and quality, and ensuring accurate measurement.

[0054] The signal output unit converts the amplified and filtered signal into a differential signal format. Differential signals offer numerous advantages. They possess strong common-mode noise suppression capabilities. During signal transmission, external interference often acts as common-mode noise simultaneously at both ends of the differential signal. At the receiving end, the differential amplifier effectively eliminates this common-mode noise, significantly improving the signal's anti-interference capability during transmission and ensuring accurate transmission to the main control circuit module. Furthermore, the differential signal format better suits the receiving requirements of the main control circuit module. Different circuit modules have different requirements for signal format and level; the differential signal format better matches the main control circuit module, ensuring signal stability and reliability during transmission and reception, reducing signal distortion or errors caused by format mismatch, and enhancing the overall collaborative operation of the measurement system.

[0055] The main control circuit module is used to generate drive control signals based on the conditioned signals; in some embodiments, the main control circuit module includes an STM32F103VC chip and its peripheral circuits.

[0056] A drive control circuit module is connected to the drive devices of the three coordinate axes of the measuring machine, and is used to control the movement of each coordinate axis based on drive control signals; in some embodiments, the drive control circuit module includes:

[0057] A digital processor circuit is used to control the motion of each coordinate axis based on drive control signals;

[0058] Position feedback circuit, used to provide real-time feedback of position information for each coordinate axis.

[0059] Specifically, the digital processor circuit controls the motion of each coordinate axis based on the drive control signal. The digital processor possesses high-speed computing and precise logical judgment capabilities. Based on the received drive control signal, it can quickly and accurately calculate the motion parameters required for each coordinate axis, such as speed, acceleration, and displacement, and convert these parameters into specific control commands, sending them to the drive device. This enables the coordinate axes to move precisely according to predetermined requirements, meeting the needs of high-precision measurement. The position feedback circuit provides real-time feedback on the position information of each coordinate axis. By comparing the actual position information with the preset target position, the digital processor can adjust the control commands in a timely manner, performing closed-loop control of the coordinate axis motion. This closed-loop control method effectively eliminates errors during the motion process, such as mechanical transmission errors and motor control errors, ensuring that the coordinate axes accurately reach the target position, further improving the accuracy and reliability of the motion.

[0060] The digital processor circuit can quickly process drive control signals and rapidly generate corresponding control commands. During the measurement process, it may be necessary to frequently adjust the motion state of the coordinate axes. The high-speed processing capability of the digital processor can ensure that the system responds to various control requirements in a timely manner, reduce the delay time of command generation, thereby improving the response speed of the entire measurement system and enabling the measuring machine to complete the measurement task faster. The position feedback circuit provides the position information of the coordinate axes in real time. The digital processor can make dynamic adjustments based on this real-time information. When the motion of the coordinate axes deviates, it can be detected immediately and adjusted quickly, avoiding long-term corrections caused by the accumulation of deviations, and further improving the system's response speed and motion efficiency.

[0061] The closed-loop control system, consisting of a position feedback circuit and a digital processor circuit, can continuously monitor and adjust the motion of the coordinate axes. When encountering external interference or changes in internal system parameters, the closed-loop control system can automatically adjust to maintain the stability of the coordinate axis motion, reduce motion fluctuations and errors caused by interference, and enable the measuring machine to maintain stable performance under various working conditions.

[0062] A power management circuit module is used to provide power outputs of different voltage levels to various circuit modules; in some embodiments, the power management circuit module includes:

[0063] Battery pack, used to provide DC power;

[0064] Charging management circuitry is used for the safe management of the battery pack.

[0065] A voltage conversion circuit is used to convert the output voltage of the battery pack into the different voltages required by each module.

[0066] Specifically, the various circuit modules of a high-precision coordinate measuring machine, such as the signal acquisition circuit module, signal conditioning circuit module, main control circuit module, and drive control circuit module, have different requirements for the voltage level of the power supply. The voltage conversion circuit can convert the voltage output by the battery pack into the different voltages required by each module, ensuring that each circuit module can work normally under the appropriate voltage, avoiding abnormal operation or damage of the module due to voltage mismatch, and ensuring the stable operation of the entire measurement system.

[0067] The charging management circuit is crucial for the safe management of the battery pack. By monitoring parameters such as battery voltage, current and temperature in real time, it precisely controls the charging process, ensuring that the battery pack always operates within a safe range, extending battery life, and also protecting the safety of the measuring instrument and users.

[0068] In some embodiments, the charging management circuit includes:

[0069] Overvoltage protection circuit, used to protect the battery pack from overvoltage.

[0070] Overcurrent protection circuit, used to protect the battery pack from overcurrent.

[0071] Specifically, the overvoltage protection circuit can monitor the battery pack in real time. When the battery pack voltage exceeds the safety threshold, it will cut off the charging circuit or take other limiting measures in time. Long-term overvoltage can cause abnormal chemical reactions inside the battery, accelerate battery aging, and may even cause serious safety problems such as battery overheating, leakage, and explosion. The overvoltage protection circuit effectively avoids this situation and ensures the safety and lifespan of the battery pack.

[0072] The overcurrent protection circuit monitors the current during charging. If the charging current is too high, it will generate a lot of heat inside the battery, causing the battery temperature to rise sharply, leading to thermal runaway, which can damage the battery or even cause a fire. When the overcurrent protection circuit detects an overcurrent, it will quickly limit the current to prevent the battery from being damaged by overheating and ensure that the battery pack is charged within a safe current range.

[0073] In some embodiments, the voltage conversion circuit includes a TPS54210 chip and its peripheral circuitry.

[0074] The communication circuit module is used to realize data transmission between the measuring machine and external devices. It supports both wired and wireless communication methods. Wired communication uses a high-speed Ethernet interface, while wireless communication uses Wi-Fi or Bluetooth protocols.

[0075] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-precision coordinate measuring machine, characterized in that, The measuring machine includes a main body and a circuit board disposed within the main body, the circuit board comprising: The signal acquisition circuit module is connected to the measuring probe of the measuring machine and is used to acquire the displacement signals of the measuring probe in three coordinate directions; The signal conditioning circuit module is connected to the signal acquisition circuit module. It conditions the acquired displacement signal and sends the conditioned signal to the main control circuit module. The main control circuit module is used to generate drive control signals based on the conditioned signals; The drive control circuit module is connected to the drive devices of the three coordinate axes of the measuring machine, and is used to control the movement of each coordinate axis based on the drive control signal; The power management circuit module is used to provide power outputs of different voltage levels to various circuit modules.

2. The high-precision coordinate measuring machine according to claim 1, characterized in that, The signal acquisition circuit module includes: The displacement signal acquisition unit includes three displacement sensors, which correspond to the measuring probe in the X, Y, and Z coordinate directions, respectively, and are used to acquire the displacement signals of the measuring probe in the three coordinate directions. The signal output interface is used to output the acquired displacement signal to the signal conditioning circuit module.

3. The high-precision coordinate measuring machine according to claim 2, characterized in that, The signal conditioning circuit module includes: The signal processing unit is used to amplify and filter the received displacement and measurement signals. The signal output unit is used to convert the amplified and filtered signal into a differential signal format and send it to the main control circuit module.

4. The high-precision coordinate measuring machine according to claim 3, characterized in that, The main control circuit module includes an STM32F103VC chip and its peripheral circuits.

5. The high-precision coordinate measuring machine according to claim 4, characterized in that, The drive control circuit module includes: A digital processor circuit is used to control the motion of each coordinate axis based on drive control signals; Position feedback circuit, used to provide real-time feedback of position information for each coordinate axis.

6. The high-precision coordinate measuring machine according to claim 5, characterized in that, The digital processor circuit includes an STM32G030K6 chip and its peripheral circuits, and the position feedback circuit includes an AM26LS32 chip and its peripheral circuits.

7. The high-precision coordinate measuring machine according to claim 6, characterized in that, The power management circuit module includes: Battery pack, used to provide DC power; Charging management circuitry is used for the safe management of the battery pack. A voltage conversion circuit is used to convert the output voltage of the battery pack into the different voltages required by each module.

8. The high-precision coordinate measuring machine according to claim 7, characterized in that, The charging management circuit includes: Overvoltage protection circuit, used to protect the battery pack from overvoltage. Overcurrent protection circuit, used to protect the battery pack from overcurrent.

9. The high-precision coordinate measuring machine according to claim 8, characterized in that, The voltage conversion circuit includes a TPS54210 chip and its peripheral circuitry.

10. The high-precision coordinate measuring machine according to claim 9, characterized in that, The measuring machine also includes: The communication circuit module is used to realize data transmission between the measuring machine and external devices.

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