Production test device of BLE Bluetooth temperature and humidity sensor

Abstract

The utility model discloses a production testing device of a BLE Bluetooth temperature and humidity sensor, which comprises the BLE Bluetooth temperature and humidity sensor, a PC end upper computer, an integrated testing instrument, a switch, a serial port burner and a Bluetooth accompanying testing gateway, the CMW500 integrated testing instrument is used for testing in a non-signaling mode, a signal shielding environment box does not need to be set up, signals can be communicated through an RF (Radio Frequency) line, and the cost is low. The test time and cost are saved; through interactive communication between the PC end upper computer and the CMW500 comprehensive test instrument, the problem that the CMW500 comprehensive test instrument needs a large amount of training before use is solved, the risk of misoperation of workers on a production site is reduced, and the RF test difficulty is reduced; the problem of mutual interference in a BLE Bluetooth signal pairing process is solved; the RF test and the pairing test are integrated in one set of system, the RF test can test whether a BLE Bluetooth signal accords with factory regulations or not, and the pairing test can test whether the BLE Bluetooth temperature and humidity sensor is normal in function or not, so that the test time is saved, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of production and testing of BLE Bluetooth sensor devices, and particularly to a production and testing device for a BLE Bluetooth temperature and humidity sensor. Background Technique

[0002] BLE Bluetooth is a low-power Bluetooth technology, a personal area network technology designed and sold by the Bluetooth Special Interest Group, aiming at emerging applications in fields such as healthcare, sports fitness, beacons, security, and home entertainment. Compared with classic Bluetooth, low-power Bluetooth aims to significantly reduce power consumption and cost while maintaining the same communication range. Its main feature is low power consumption, enabling wearable devices with relatively high requirements for power consumption to remain powered on for a long time.

[0003] Traditional manual inspection and recording of environmental temperature and humidity changes are not easy. With the development of the times, temperature and humidity sensors that can realize intelligent monitoring of the environment have emerged. Using BLE Bluetooth temperature and humidity sensors to monitor the environmental temperature and humidity in real time can not only timely detect abnormalities in the environmental temperature and humidity, and then take corresponding measures to avoid or reduce losses, but also reduce the workload and labor cost. Each BLE Bluetooth temperature and humidity sensor does not require an additional power cord and uses an embedded disposable lithium battery, with each battery having a service life of up to 3 years, greatly reducing the installation cost and the cost of later maintenance.

[0004] Wireless radio frequency (RF) testing is to detect through radio and electronic communication devices to ensure the effective use of the radio spectrum by the device without interfering with other users' use of the radio spectrum. Wireless radio frequency testing technologies include Bluetooth, Wi-Fi, Zigbee, trunked communication (PMR) radio, radio frequency identification (RFID), near field communication (NFC), global positioning system (GPS), mobile phone technology, etc. Usually, other detections are also required to verify whether the device complies with local electromagnetic compatibility (EMC) electrical safety and radio frequency exposure regulatory requirements.

[0005] The functional testing of electronic products is to evaluate and analyze whether the software and hardware functions of electronic products meet the design requirements when they leave the factory. When products leave the factory, functional tests must be carried out on the products to eliminate defective products that appear during the production process from the production line and analyze and repair them by technical personnel to meet a 100% factory pass rate.

[0006] In the prior art, when a BLE Bluetooth temperature and humidity sensor is tested using a CMW500 comprehensive tester during the production process, a large amount of training is required in the early stage. It is highly professional and has high professional requirements for operators. Moreover, there is mutual interference during the BLE Bluetooth signal pairing process. Additionally, the above-mentioned wireless radio frequency (RF) test and functional test are separately tested, which increases the test time and reduces the test efficiency. Therefore, we need to propose a production test device for BLE Bluetooth temperature and humidity sensors. Summary of the Invention

[0007] The purpose of the present utility model is to provide a production test device for BLE Bluetooth temperature and humidity sensors, which uses a CMW500 comprehensive tester for testing in a non-signaling mode. There is no need to build a signal shielding environment box, and the signal can communicate through an RF radio frequency cable, saving test time and costs; through the interactive communication between the PC-side host computer and the CMW500 comprehensive tester, the problem of the need for a large amount of training before using the CMW500 comprehensive tester is solved, reducing the risk of misoperation by workers at the production site. The entire process is automated, reducing the difficulty of RF testing; for the problem that signal interference will occur and cause test failure when several test workstations pair simultaneously during the factory test process, in the functional test link, the pairing broadcast name of each BLE Bluetooth temperature and humidity sensor is modified, so that the BLE Bluetooth temperature and humidity sensors tested by each workstation only pair with the corresponding gateway device, solving the problem of mutual interference during the BLE Bluetooth signal pairing process; the RF test and pairing test are integrated in a set of systems, saving test items. The former can test whether the BLE Bluetooth signal meets the factory regulations, and the latter can test whether the BLE Bluetooth temperature and humidity sensor is normal in function, saving test time and improving test efficiency, so as to solve the problems proposed in the above background technology.

[0008] To achieve the above object, the present utility model provides the following technical solution: A production test device for BLE Bluetooth temperature and humidity sensors, including a BLE Bluetooth temperature and humidity sensor, a PC-side host computer, a comprehensive tester, a switch, a serial port programmer, and a Bluetooth co-testing gateway. The BLE Bluetooth temperature and humidity sensor is a temperature and humidity sensor integrated with a BLE Bluetooth chip. The comprehensive tester is a CMW500 broadband communication tester. The BLE Bluetooth temperature and humidity sensor is respectively connected to the PC-side host computer and the comprehensive tester. The comprehensive tester is connected to the PC-side host computer through a switch. The comprehensive tester and the PC-side host computer are in the same network segment. The Bluetooth co-testing gateway is paired and connected to the BLE Bluetooth temperature and humidity sensor.

[0009] Preferably, there are reserved RF test points on the circuit board of the BLE Bluetooth temperature and humidity sensor, and the RF test points are connected to the RF radio frequency cable of channel 1 on the comprehensive tester through a fixture.

[0010] Preferably, the comprehensive tester is connected to the switch via a network cable, and the switch is connected to the PC host via a network cable.

[0011] Preferably, the BLE Bluetooth temperature and humidity sensor includes a chip U1. A temperature and humidity sensor U2 is connected to pins 9 and 10 of the chip U1. Pin 3 of the temperature and humidity sensor U2 is connected to the power supply VCC and is connected with a capacitor C5. One end of the capacitor C5 is grounded. Pull-up resistors R6 and R7 are connected to pins 1 and 2 of the temperature and humidity sensor U2. One ends of the pull-up resistor R6 and the pull-up resistor R7 are both connected to the power supply VCC.

[0012] Preferably, one ends of pins 23 and 24 of the BLE Bluetooth temperature and humidity sensor chip U1 are connected to a programming test point JP2. The programming test point JP2 is connected to a serial programming device. The serial programming device is connected to the PC host via a USB cable. The other end of pin 24 of the chip U1 is connected to a diode D1. The function of the diode D1 is to prevent external current from flowing back during the test of the test point JP2.

[0013] Preferably, one ends of pins 20 and 21 of the BLE Bluetooth temperature and humidity sensor chip U1 are connected to a test point JP3. The test point JP3 is a UART serial port for the log output of the BLE Bluetooth temperature and humidity sensor. The other end of pin 21 of the chip U1 is connected to a diode D3. The function of the diode D3 is to prevent external current from flowing back when technicians use a UART to USB serial port tool to connect to JP3 to view the sensor log.

[0014] Pin 17 of the BLE Bluetooth temperature and humidity sensor chip U1 is connected to the LED light of the BLE Bluetooth temperature and humidity sensor. Pin 18 of the BLE Bluetooth temperature and humidity sensor chip U1 is connected to the external button of the BLE Bluetooth temperature and humidity sensor. Pin 16 of the BLE Bluetooth temperature and humidity sensor chip U1 is grounded. Pin 15 of the BLE Bluetooth temperature and humidity sensor chip U1 is connected to VCC and is connected with capacitors C2 and C3. The other ends of the capacitors C2 and C3 are both grounded. The chip U1 is a Bluetooth SoC chip of model BK3633.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. The present utility model uses a CMW500 comprehensive tester for testing in the non-signaling mode. There is no need to build a signal shielding environment box, and the signal can communicate through an RF radio frequency cable, saving test time and cost;

[0017] 2. The utility model realizes interactive communication between the PC-side host computer and the CMW500 comprehensive tester, solves the problem that a large amount of training is required before using the CMW500 comprehensive tester, reduces the risk of misoperation by workers at the production site, automates the whole process, and reduces the difficulty of RF testing;

[0018] 3. In view of the problem that signal interference may occur and cause test failure when several test workstations are paired simultaneously during the factory testing process, in the functional test link, the pairing broadcast name of each BLE Bluetooth temperature and humidity sensor is modified, so that the BLE Bluetooth temperature and humidity sensors tested at each workstation are only paired with the corresponding gateway device, solving the problem of mutual interference during the pairing process of BLE Bluetooth signals;

[0019] 4. The RF test and pairing test of the utility model are integrated in a set of systems, saving test items. The former can test whether the BLE Bluetooth signal meets the factory regulations, and the latter can test whether the BLE Bluetooth temperature and humidity sensor is normal in function, saving test time and improving test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the test architecture diagram of the utility model;

[0021] Figure 2 is the flowchart of RF testing of the BLE Bluetooth temperature and humidity sensor of the utility model;

[0022] Figure 3 is the flowchart of functional testing of the BLE Bluetooth temperature and humidity sensor of the utility model;

[0023] Figure 4 is the schematic diagram of the reserved RF test points of the Bluetooth chip of the BLE Bluetooth temperature and humidity sensor of the utility model.

[0024] Figure 5 is the external circuit diagram of the Bluetooth chip of the BLE Bluetooth temperature and humidity sensor of the utility model.

[0025] Figure 6 is the external circuit diagram of the sensor chip of the BLE Bluetooth temperature and humidity sensor of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figure 1-6 The present utility model provides a technical solution: a production test device for a BLE Bluetooth temperature and humidity sensor, which includes a BLE Bluetooth temperature and humidity sensor, a PC-side host computer, a comprehensive tester, a switch, a serial port programmer, and a Bluetooth co-testing gateway. The BLE Bluetooth temperature and humidity sensor is a temperature and humidity sensor integrated with a BLE Bluetooth chip. The comprehensive tester is a CMW500 broadband communication tester. The BLE Bluetooth temperature and humidity sensor is respectively connected to the PC-side host computer and the comprehensive tester. The comprehensive tester is connected to the PC-side host computer through a switch. The comprehensive tester and the PC-side host computer are in the same network segment. The Bluetooth co-testing gateway is paired and connected with the BLE Bluetooth temperature and humidity sensor.

[0028] The comprehensive tester supports technologies such as BLE, LTE-A, WCDMA / HSPA, GSM / GPRS / EGPRS, CDMA2000, and TD-SCDMA. The program of the PC-side host computer includes test software.

[0029] There are reserved RF test points on the circuit board of the BLE Bluetooth temperature and humidity sensor. The RF test points are connected to the RF radio frequency line of channel 1 on the comprehensive tester through a fixture.

[0030] The comprehensive tester and the switch are connected through a network cable. The switch and the PC-side host computer are connected through a network cable.

[0031] The BLE Bluetooth temperature and humidity sensor includes a chip U1. A temperature and humidity sensor U2 is connected to pins 9 and 10 of the chip U1. Pin 3 of the temperature and humidity sensor U2 is connected to the power supply VCC and is connected with a capacitor C5. One end of the capacitor C5 is grounded. Pull-up resistors R6 and R7 are provided at pins 1 and 2 of the temperature and humidity sensor U2. One ends of the pull-up resistor R6 and the pull-up resistor R7 are both connected to the power supply VCC.

[0032] One ends of pins 23 and 24 of the BLE Bluetooth temperature and humidity sensor chip U1 are connected to a programming and testing point JP2. The programming and testing point JP2 is connected to the serial port programmer. The serial port programmer is connected to the PC-side host computer through a USB cable. The other end of pin 24 of the chip U1 is connected to a diode D1. The function of the diode D1 is to prevent external current from flowing back during the test of the test point JP2.

[0033] One ends of pins 20 and 21 of the BLE Bluetooth temperature and humidity sensor chip U1 are connected to a test point JP3. The test point JP3 is a UART serial port for the log output of the BLE Bluetooth temperature and humidity sensor. The other end of pin 21 of the chip U1 is connected to a diode D3. The function of the diode D3 is to prevent external current from flowing back when technicians use a UART-to-USB serial port tool to connect to JP3 to view the sensor log.

[0034] Pin 17 of the BLE Bluetooth temperature and humidity sensor chip U1 is connected to the LED of the BLE Bluetooth temperature and humidity sensor. Pin 18 of the BLE Bluetooth temperature and humidity sensor chip U1 is connected to the external button of the BLE Bluetooth temperature and humidity sensor. Pin 16 of the BLE Bluetooth temperature and humidity sensor chip U1 is grounded. Pin 15 of the BLE Bluetooth temperature and humidity sensor chip U1 is connected to VCC and is connected with capacitors C2 and C3, and the other ends of the capacitors C2 and C3 are both grounded. The chip U1 is set as a Bluetooth SoC chip of model BK3633.

[0035] The process of this device in use is as follows:

[0036] Step 1: Connect the reserved RF test point on the BLE Bluetooth temperature and humidity sensor circuit board to the RF radio frequency line of channel 1 of the CMW500 comprehensive tester using a fixture. Connect the CMW500 comprehensive tester and the PC-side upper computer using a network cable (which needs to pass through a switch / router); set the CMW500 comprehensive tester and the PC-side upper computer to the same network segment;

[0037] Step 2: Connect the reserved programming test point on the BLE Bluetooth temperature and humidity sensor circuit board to the Uart to TTL serial programming device, and then connect the serial programming device to the PC-side upper computer through a USB cable;

[0038] Step 3: After the above steps, power on and start the BLE Bluetooth temperature and humidity sensor, turn on the PC-side upper computer, open the corresponding serial port of the BLE Bluetooth temperature and humidity sensor. The PC-side upper computer issues an AT command through the serial port, and the BLE Bluetooth temperature and humidity sensor enters the RF transmit power test mode. The BLE Bluetooth temperature and humidity sensor broadcasts at a fixed frequency externally (BLE channel 1). At the same time, the PC-side upper computer interacts with the CMW500 comprehensive tester through Ethenet, and issues commands to set the test power of the CMW500 comprehensive tester: 2404 MHz, additional loss compensation: 1 dbm, and set the filter type: BandPass (band-pass filtering). After the command settings are completed, the CMW500 comprehensive tester enters the non-signaling test mode and receives the fixed-frequency signal transmitted by the BLE Bluetooth temperature and humidity sensor.

[0039] When the CMW500 comprehensive tester receives the fixed-frequency signal, it will immediately display the received transmit power. The PC-side upper computer will read the power of the CMW500 comprehensive tester through Ethenet and display it on the PC-side upper computer. The PC-side upper computer will make a judgment and calculate whether this value is within the specified power range. And record the judgment result.

[0040] Step 4: After the above steps are completed, the PC host computer issues AT commands through the serial port, and the BLE Bluetooth temperature and humidity sensor enters the RF receiving power test mode. The PC host computer interacts with the CMW500 comprehensive tester through Ethenet, issues commands to reset the device, and sets the test power of the CMW500 comprehensive tester: 2404 MHz, signal transmitter power -30 dbm, signal transmitter mode ARB, additional loss compensation: 1 dbm. After the command settings are completed, the CMW500 comprehensive tester enters the non-signaling test mode and transmits an analog BLE Bluetooth fixed-frequency signal.

[0041] When the BLE Bluetooth temperature and humidity sensor receives the fixed-frequency signal, it will immediately send the received signal power to the PC host computer through the Uart port. The PC host computer will make a judgment, calculate whether this value is within the specified power range, and display and record the judgment result.

[0042] Step 5: After the above steps are completed, disconnect the RF cable at the RF test point on the BLE Bluetooth temperature and humidity sensor, and prepare a Bluetooth co-test gateway that can be used for pairing tests with the BLE Bluetooth temperature and humidity sensor. This gateway enters the Bluetooth search and pairing mode by default after power-on. The PC host computer issues AT commands through the serial port and sends the reserved pairing broadcast name in the PC host computer to the BLE Bluetooth temperature and humidity sensor. At this time, the BLE Bluetooth temperature and humidity sensor modifies the broadcast name, and the broadcast name is the reserved pairing broadcast name in the PC host computer, and enters the pairing mode. In this pairing mode, the BLE Bluetooth temperature and humidity sensor pairs and connects with the device with the reserved pairing broadcast name in the PC host computer to prevent devices with the same broadcast name from pairing with the gateway simultaneously on several production lines at the site; the pairing process defaults to 30 seconds. After the time is up, the BLE Bluetooth temperature and humidity sensor will immediately send information on whether the pairing is successful or failed and the temperature and humidity information in the current environment to the PC host computer through the Uart port. The PC host computer will record and judge, calculate whether the temperature and humidity value is within the specified range, and display and record the judgment result.

Claims

1. A production test device for a BLE Bluetooth temperature and humidity sensor, characterized in that: It includes a BLE Bluetooth temperature and humidity sensor, a PC-side host computer, a comprehensive tester, a switch, a serial port programmer, and a Bluetooth co-testing gateway. The BLE Bluetooth temperature and humidity sensor is a temperature and humidity sensor integrated with a BLE Bluetooth chip. The comprehensive tester is a CMW500 broadband communication tester. The BLE Bluetooth temperature and humidity sensor is respectively connected to the PC-side host computer and the comprehensive tester. The comprehensive tester is connected to the PC-side host computer through a switch. The comprehensive tester and the PC-side host computer are in the same network segment. The Bluetooth co-testing gateway is paired and connected to the BLE Bluetooth temperature and humidity sensor.

2. The production test device for a BLE Bluetooth temperature and humidity sensor according to claim 1, characterized in that: There are reserved RF test points on the circuit board of the BLE Bluetooth temperature and humidity sensor. The RF test points are connected to the RF radio frequency line of Channel 1 on the comprehensive tester through a fixture.

3. The production test device for a BLE Bluetooth temperature and humidity sensor according to claim 1, characterized in that: The comprehensive tester and the switch are connected by a network cable, and the switch and the PC-side host computer are connected by a network cable.

4. The production test device for a BLE Bluetooth temperature and humidity sensor according to claim 1, wherein: The BLE Bluetooth temperature and humidity sensor includes a chip U1. A temperature and humidity sensor U2 is connected to pins 9 and 10 of the chip U1. Pin 3 of the temperature and humidity sensor U2 is connected to the power supply VCC and is connected with a capacitor C5. One end of the capacitor C5 is grounded. Pull-up resistors R6 and R7 are provided for pins 1 and 2 of the temperature and humidity sensor U2. One ends of the pull-up resistor R6 and the pull-up resistor R7 are both connected to the power supply VCC.

5. The production test device of a BLE Bluetooth temperature and humidity sensor according to claim 4, characterized in that: One ends of pins 23 and 24 of the BLE Bluetooth temperature and humidity sensor chip U1 are connected to a programming test point JP2. The programming test point JP2 is connected to the serial port programmer. The serial port programmer is connected to the PC-side host computer through a USB cable. The other end of pin 24 of the chip U1 is connected to a diode D1.

6. The production test device for a BLE Bluetooth temperature and humidity sensor according to claim 5, characterized in that: One ends of pins 20 and 21 of the BLE Bluetooth temperature and humidity sensor chip U1 are connected to a test point JP3. The test point JP3 is a UART serial port. The other end of pin 21 of the chip U1 is connected to a diode D3. Pin 17 of the BLE Bluetooth temperature and humidity sensor chip U1 is connected to the LED lamp of the BLE Bluetooth temperature and humidity sensor. Pin 18 of the BLE Bluetooth temperature and humidity sensor chip U1 is connected to the external button of the BLE Bluetooth temperature and humidity sensor. Pin 16 of the BLE Bluetooth temperature and humidity sensor chip U1 is grounded. Pin 15 of the BLE Bluetooth temperature and humidity sensor chip U1 is connected to VCC and is connected with capacitors C2 and C3. The other ends of the capacitors C2 and C3 are both grounded.

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