Sphygmomanometer testing system

Abstract

The utility model relates to the technical field of testing, in particular to a sphygmomanometer testing system, which comprises a gas circuit detection unit, a measurement and control circuit unit, a power supply unit, a main control unit and a display screen, and the gas circuit detection unit, the measurement and control circuit unit, the power supply unit and the display screen are all connected with the main control unit. The air path detection unit simulates an air path environment of the sphygmomanometer in actual use, tests whether the sphygmomanometer can accurately read a pressure value, and calculates an air leakage rate of the sphygmomanometer in an air leakage detection mode; the measurement and control circuit unit is used for detecting the working current of the sphygmomanometer, the power supply unit is used for providing voltage for the gas circuit detection unit, the measurement and control circuit unit, the detected sphygmomanometer, the main control unit and the display screen, and the display screen is used for displaying a test result. The electronic blood pressure tester is used for testing static pressure, power consumption and pressure leakage of the electronic blood pressure instrument, so that the whole test is simple and effective, the test speed is improved, and accurate test data is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of testing, in particular to a sphygmomanometer testing system. Background Art

[0002] A sphygmomanometer is an instrument used by hospitals or families to observe human blood pressure using an indirect measurement method. This device uses electronic technology to measure human blood pressure values, and is accurate, convenient, and fast. It is widely used in clinical medicine, scientific research, preventive health care, and other aspects.

[0003] Electronic sphygmomanometers go through multiple steps when measuring pressure, which can easily lead to errors. According to the actual technical requirements of the sphygmomanometer production site, it is necessary to check the sphygmomanometer gas circuit leakage pressure, working characteristic curve, power consumption and measurement time.

[0004] Currently, blood pressure simulators are commonly used to test electronic sphygmomanometers, but they have the problems of high cost and complicated operation. Utility Model Content

[0005] The utility model provides a sphygmomanometer testing system, which reduces the cost and improves the testing efficiency.

[0006] In order to achieve the purpose of the utility model, the technical solution adopted is: a sphygmomanometer testing system, including an air path detection unit, a measurement and control circuit unit, a power supply unit, a main control unit and a display screen, wherein the air path detection unit, the measurement and control circuit unit, the power supply unit and the display screen are all connected to the main control unit, the air path detection unit simulates the air path environment of the sphygmomanometer in actual use, tests whether the sphygmomanometer can accurately read the pressure value, and calculates the leakage rate of the sphygmomanometer in the leakage detection mode; the measurement and control circuit unit is used to detect the working current of the sphygmomanometer, the power supply unit is used to provide voltage to the air path detection unit, the measurement and control circuit unit, the sphygmomanometer under test, the main control unit and the display screen, and the display screen is used to display the test results.

[0007] As an optimization solution of the utility model, the air circuit detection unit includes a pressure generator and a pressure sensor. The measurement and control circuit unit controls the pressure generator to generate a stable test pressure to test whether the sphygmomanometer can read the pressure value. The pressure sensor continuously monitors the pressure changes in the air circuit and calculates the leakage rate.

[0008] As an optimization solution of the utility model, the measurement and control circuit unit includes a current test circuit, which includes a resistor R1, an operational amplifier U1, a resistor R2, a resistor R4, a resistor R5, a resistor R7 and a MOS tube Q2, wherein the resistor R1 is connected between the third pin and the fourth pin of the operational amplifier U1, the resistor R7 is connected between the first pin of the operational amplifier U1 and ground, the resistor R2, the resistor R4 and the resistor R5 are connected in series between the first pin and the third pin of the operational amplifier U1, the first pin of the MOS tube Q2 is connected to the main control unit, the second pin of the MOS tube Q2 is grounded, and the third pin of the MOS tube Q2 is connected to the blood pressure monitor being measured.

[0009] As an optimization solution of the utility model, the main control unit is a single-chip microcomputer U1, and the single-chip microcomputer U1 is STC12C5410AD.

[0010] As an optimization solution of the utility model, the display screen is the display module U2, the third pin of the display module U2 is connected to the fourth pin of the single-chip microcomputer U1, and the fourth pin of the display module U2 is connected to the fifth pin of the single-chip microcomputer U1.

[0011] As an optimization solution of the utility model, the power supply unit includes a rechargeable battery and a power conversion circuit, the power conversion circuit includes a switching regulator U3, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, an inductor L3, an inductor L4, an inductor L5, an inductor L6, an inductor L7 and a voltage regulator diode ZD1, the capacitor C11 is connected between the 5th pin and the 7th pin of the switching regulator U3, the capacitor C12 and the inductor L3 connected in series are connected in parallel with the capacitor C12 at the switch. The inductor L5 is connected between the 5th pin and the 8th pin of the switching regulator U3, the inductor L4 is connected between the 2nd pin of the switching regulator U3 and the ground, the capacitor C14 and the inductor L6 are connected in series between the 8th pin of the switching regulator U3 and the ground, the capacitor C14, the zener diode ZD1 and the capacitor C15 are connected in series between the 8th pin of the switching regulator U3 and the ground, and the inductor L6 is connected between the 8th pin and the 2nd pin of the switching regulator U3.

[0012] The utility model has positive effects: 1) The utility model is used to test the static pressure, power consumption and leakage pressure of the electronic blood pressure meter, making the overall test simple and effective, improving the test speed, providing accurate test data, and is suitable for the batch test requirements of factory electronic blood pressure meters;

[0013] 2) When the utility model tests the electronic blood pressure instrument, the electronic blood pressure meter does not need to be connected to a separate power supply, and the blood pressure meter being tested is directly powered by the blood pressure meter test system, which greatly expands the application occasions;

[0014] 3) Compared with the current blood pressure simulator, the utility model also has the advantages of low cost and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0016] Figure 1 It is a principle block diagram of the utility model;

[0017] Figure 2 It is the principle diagram of the current testing circuit of the utility model;

[0018] Figure 3 It is the circuit principle diagram of the main control unit of the utility model;

[0019] Figure 4 It is a circuit principle diagram of the power conversion circuit of the utility model. DETAILED DESCRIPTION

[0020] like Figure 1 As shown, the utility model discloses a sphygmomanometer testing system, comprising an air circuit detection unit, a measurement and control circuit unit, a power supply unit, a main control unit and a display screen, wherein the air circuit detection unit, the measurement and control circuit unit, the power supply unit and the display screen are all connected to the main control unit, the air circuit detection unit simulates the air circuit environment of the sphygmomanometer in actual use, tests whether the sphygmomanometer can accurately read the pressure value, and calculates the leakage rate of the sphygmomanometer in the leakage detection mode; the measurement and control circuit unit is used to detect the working current of the sphygmomanometer, the power supply unit is used to provide voltage to the air circuit detection unit, the measurement and control circuit unit, the sphygmomanometer to be tested, the main control unit and the display screen, and the display screen is used to display the test results.

[0021] The gas circuit detection unit includes a pressure generator and a pressure sensor. The measurement and control circuit unit controls the pressure generator to generate a stable test pressure to test whether the sphygmomanometer can read the pressure value. The pressure sensor continuously monitors the pressure change in the gas circuit and calculates the leakage rate. The pressure generator uses a micro-piezoelectric pump MAC20. The MAC20A micro-piezoelectric pump is an air pump with piezoelectric ceramics as the driving element. It has a compact structure, is thin and light, works quietly and has a high output pressure.

[0022] The pressure sensor uses MPS-2107-006GRA, with a pressure range of 30-300mmHg and a sensitivity of 5uV / V / mmHg. MPS-2107-006GRA makes the test results more accurate.

[0023] like Figure 2As shown, the measurement and control circuit unit includes a current test circuit, which includes a resistor R1, an operational amplifier U1, a resistor R2, a resistor R4, a resistor R5, a resistor R7 and a MOS tube Q2. The resistor R1 is connected between the third pin and the fourth pin of the operational amplifier U1, the resistor R7 is connected between the first pin of the operational amplifier U1 and the ground, the resistor R2, the resistor R4 and the resistor R5 are connected in series between the first pin and the third pin of the operational amplifier U1, the first pin of the MOS tube Q2 is connected to the main control unit, the second pin of the MOS tube Q2 is grounded, and the third pin of the MOS tube Q2 is connected to the blood pressure meter to be measured. Among them, the resistor R4 is used as a sampling resistor, and its current I=V out ×R2 / (R2×R4). The power consumption of the electronic blood pressure monitor is tested through the current test circuit.

[0024] like Figure 3 As shown, the main control unit is a single chip microcomputer U1, and the single chip microcomputer U1 is STC12C5410AD. The display screen is a display module U2, and the third pin of the display module U2 is connected to the fourth pin of the single chip microcomputer U1, and the fourth pin of the display module U2 is connected to the fifth pin of the single chip microcomputer U1. A large color serial port screen DC10600CM070_X111_OC is used.

[0025] The power supply unit includes a rechargeable battery and a power conversion circuit. The measurement and control circuit unit, the main control unit, and the pressure sensor display can all be powered by 5V, but the pressure generator requires a 15V voltage drive, so a 5V to 15V power conversion circuit is designed, such as Figure 4 As shown, the power conversion circuit includes a switching regulator U3, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, an inductor L3, an inductor L4, an inductor L5, an inductor L6, an inductor L7 and a Zener diode ZD1, wherein the capacitor C11 is connected between the 5th pin and the 7th pin of the switching regulator U3, the capacitor C12 and the inductor L3 connected in series are connected in parallel with the capacitor C12 between the 1st pin and the ground of the switching regulator U3, the inductor L5 is connected between the 5th pin and the 8th pin of the switching regulator U3, the inductor L4 is connected between the 2nd pin of the switching regulator U3 and the ground, the capacitor C14 and the inductor L6 are connected in series between the 8th pin of the switching regulator U3 and the ground, the capacitor C14, the Zener diode ZD1 and the capacitor C15 are connected in series between the 8th pin of the switching regulator U3 and the ground, and the inductor L6 is connected between the 8th pin and the 2nd pin of the switching regulator U3. The switching regulator CS5171,3 is very powerful. It can realize voltage reduction, voltage boost or inverting output, and can also realize positive and negative symmetrical dual power supply output. Its operating voltage range is 2.7V~30V, and the maximum output current is 1.5A. In addition, the power supply of the blood pressure meter can be equipped with a battery or a voltage divider resistor can be added on the basis of the power conversion circuit to power the blood pressure meter.

[0026] Connect the sphygmomanometer test system to the pressure generator. Then measure "0mmHg", "50mmHg", "100mmHg", "150mmHg", "200mmHg", "250mmHg" and "290mmHg" respectively. Compare the display value and the standard air pressure measurement value to see if they are within the range of + / -0.5mmHg.

[0027] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sphygmomanometer testing system, characterized in that: It includes an air circuit detection unit, a measurement and control circuit unit, a power supply unit, a main control unit and a display screen. The air circuit detection unit, the measurement and control circuit unit, the power supply unit and the display screen are all connected to the main control unit. The air circuit detection unit simulates the air circuit environment of the sphygmomanometer in actual use, tests whether the sphygmomanometer can accurately read the pressure value, and calculates the leakage rate of the sphygmomanometer in the leakage detection mode; the measurement and control circuit unit is used to detect the working current of the sphygmomanometer, the power supply unit is used to provide voltage for the air circuit detection unit, the measurement and control circuit unit, the sphygmomanometer under test, the main control unit and the display screen, and the display screen is used to display the test results.

2. A sphygmomanometer testing system according to claim 1, characterized in that: The gas circuit detection unit includes a pressure generator and a pressure sensor. The measurement and control circuit unit controls the pressure generator to generate a stable test pressure to test whether the sphygmomanometer can read the pressure value. The pressure sensor continuously monitors the pressure changes in the gas circuit and calculates the leakage rate.

3. A sphygmomanometer testing system according to claim 2, characterized in that: The measurement and control circuit unit includes a current test circuit, which includes a resistor R1, an operational amplifier U1, a resistor R2, a resistor R4, a resistor R5, a resistor R7 and a MOS tube Q2, wherein the resistor R1 is connected between the third pin and the fourth pin of the operational amplifier U1, the resistor R7 is connected between the first pin of the operational amplifier U1 and ground, the resistor R2, the resistor R4 and the resistor R5 are connected in series between the first pin and the third pin of the operational amplifier U1, the first pin of the MOS tube Q2 is connected to the main control unit, the second pin of the MOS tube Q2 is grounded, and the third pin of the MOS tube Q2 is connected to the blood pressure monitor being measured.

4. A sphygmomanometer testing system according to claim 3, characterized in that: The main control unit is a single chip microcomputer U1, and the single chip microcomputer U1 is STC12C5410AD.

5. A sphygmomanometer testing system according to claim 4, characterized in that: The display screen is a display module U2, the third pin of the display module U2 is connected to the fourth pin of the single-chip computer U1, and the fourth pin of the display module U2 is connected to the fifth pin of the single-chip computer U1.

6. A sphygmomanometer testing system according to claim 5, characterized in that: The power supply unit includes a rechargeable battery and a power conversion circuit, wherein the power conversion circuit includes a switching regulator U3, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, an inductor L3, an inductor L4, an inductor L5, an inductor L6, an inductor L7 and a voltage regulator diode ZD1, wherein the capacitor C11 is connected between the 5th pin and the 7th pin of the switching regulator U3, and the capacitor C12 and the inductor L3 connected in series are connected in parallel with the capacitor C12 to the switching regulator U3. between the 1st pin of the switching regulator U3 and ground, the inductor L5 is connected between the 5th pin and the 8th pin of the switching regulator U3, the inductor L4 is connected between the 2nd pin of the switching regulator U3 and ground, the capacitor C14 and the inductor L6 are connected in series between the 8th pin of the switching regulator U3 and ground, the capacitor C14, the Zener diode ZD1 and the capacitor C15 are connected in series between the 8th pin of the switching regulator U3 and ground, and the inductor L6 is connected between the 8th pin and the 2nd pin of the switching regulator U3.

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