CN208447638U - A kind of ultrasonic system that can measure brainpan middle line - Google Patents

Abstract

The utility model discloses the ultrasonic systems that one kind can measure brainpan middle line, it pops one's head in including cerebral MRI, the cerebral MRI probe is electrically connected with transmitting driving unit input terminal, the transmitting driving unit output end is electrically connected with signal processing unit input terminal, and the signal processing unit output end is electrically connected by AD conversion unit with the FPGA unit of the processing for ultrasonic signal；The FPGA unit is electrically connected with memory, LCD display, arm processor respectively again, and the arm processor is electrically connected with keyboard again；It further include that the internal battery and power circuit of power supply are provided for whole system.The utility model has the function of One-Dimensional Ultrasonic inspection, automatic depth measurement, intuitive display and comparing management；The measurement analysis of brain middle line is carried out by the way of ultrasound；It automatically analyzes comparison and exports diagnostic message.

Description

A kind of ultrasonic system that can measure brainpan middle line

Technical field

The utility model relates to a kind of ultrasonic systems of brain center line survey, belong to medical detection field.

Background technique

Currently known brain inspection generally has brain CT, brain magnetic resonance (MRI), Cerebral vessels ultrasound inspection (TCD) etc.. The measuring device of brain middle line based on ultrasonic technique will check another important equipment to brain.The equipment is convenient, fast, especially It can quick diagnosis or convenient follow-up investigations to craniocerebral injury, cerebral hemorrhage etc..

Summary of the invention

Insufficient according to prior art, the utility model provides a kind of ultrasonic system that can measure brainpan middle line, has The function of One-Dimensional Ultrasonic inspection, automatic depth measurement, intuitive display and comparing management.Purpose is to provide a kind of rapid and convenient Measurement brain middle line ultrasonic solution.

The utility model is realized by following technical scheme:

A kind of ultrasonic system that can measure brainpan middle line, including cerebral MRI probe, the cerebral MRI probe and hair The electrical connection of driving unit input terminal is penetrated, the transmitting driving unit output end is electrically connected with signal processing unit input terminal, described Signal processing unit output end is electrically connected by AD conversion unit with the FPGA unit of the processing for ultrasonic signal；It is described FPGA unit is electrically connected with memory, LCD display, arm processor respectively again, and the arm processor is electrically connected with keyboard again； It further include that the internal battery and power circuit of power supply are provided for whole system.

Preferably, the cerebral MRI probe is A-mode ultrasonic probe, is popped one's head in as single array element, 1 ~ 2MHz of frequency.

Preferably, the FPGA unit handles chip using EP4CE6E22C8.

Preferably, the arm processor handles chip using STM32F103.

Preferably, the AD conversion unit uses AD9235 conversion chip.

Preferably, the signal processing unit uses AD8331 signal amplification chip.

The utility model the utility model has the advantages that

The utility model has the function of One-Dimensional Ultrasonic inspection, automatic depth measurement, intuitive display and comparing management； The measurement analysis of brain middle line is carried out by the way of ultrasound；It automatically analyzes comparison and exports diagnostic message.

Detailed description of the invention

Fig. 1 is Tthe utility model system block diagram；

Fig. 2 is transmitting driving unit circuit connection diagram；

Fig. 3 is signal processing unit and AD conversion unit circuit connection diagram；

Fig. 4 is the utility model cranium brain center line survey schematic diagram.

Specific embodiment

Below in conjunction with attached drawing, the utility model is further described by specific embodiment.

As shown in Figure 1, the utility model emits driving unit 20 to cerebral MRI probe 10 using cerebral MRI probe 10 Pumping signal is issued, excitation cerebral MRI probe 10 generates ultrasonic signal；Ultrasonic signal generates back by brain tissue modulation Wave signal；Echo-signal is converted to electric signal by cerebral MRI probe 10.By the decaying twice of skull, the echo received is believed It is number very faint.Ultra-weak electronic signal enters AD conversion unit 40 by signal processing unit 30.The digital signal of conversion is sent into FPGA unit 50.Digital signal carries out a series of Digital Signal Processing again in FPGA unit 50, extracts valuable information. According to the physical property that the anatomical structure of brain and ultrasonic signal are transmitted in brain tissue, ultrasonic signal is in transmitting beginning and brain Midline position can be bigger, it may appear that signal peak；By measuring the time between the two signal peaks, so that it may calculate two The distance at place, i.e. distance of the head side to brain middle line.FPGA unit 50 is connected to memory 60, for storing measurement data, It is used for system video memory simultaneously.FPGA unit 50 is connected to LCD display 70, drives 70 display waveform of LCD display, measurement result And the operation of user.Arm processor 80 is used to control the operation of complete machine, and the analysis of measurement result receives the input letter of keyboard 110 Breath etc..Internal battery 90 and power circuit 100 provide the power supply of complete machine.

Fig. 2 gives transmitting driving unit circuit connection diagram, uses IRFR210 type metal-oxide-semiconductor in the circuit, and Fig. 3 gives Gone out signal processing unit and AD conversion unit circuit connection diagram, wherein AD8331 be a single channel, it is ultra-low noise, linear DB variable gain amplifier (VGA), is optimized for ultrasonic system application, may be used as low-noise variable gain element, Frequency is up to 120 MHz.A ultra low noise preamplifier (LNA) built in this device and one have adjustable output The optional gain post amplifier of limitation function.LNA gain is 19 dB, has single ended input and difference output.One can be used Resistance adjusts LNA input impedance, to match with signal source, without influencing noiseproof feature.The operating temperature model of AD8331 Enclosing is -40 °C to+85 °C, is encapsulated using 20 pin QSOP.

AD9235 belongs to single-chip, 12,20/40/65 MSPS analog-digital converter (ADC) series, using 3 V single supplies Power supply, a high-performance sample/hold amplifier (SHA) and reference voltage source built in AD9235.AD9235 uses multi-level differential stream Waterline framework, built-in output error correction logic can provide 12 precision in 20/40/65 MSPS data rate, and guarantee whole No missing code in a operating temperature range.AD9235 is manufactured using advanced CMOS technology, provides 28 pins the ultra-thin small-sized envelope of deflation (TSSOP) and 32 pin wafer-level packages (LFCSP) are filled, rated temperature range is -40 °C to+85 °C industrial temperature ranges.

The course of work is as follows:

A, arm processor 80 receives the measuring command of user by keyboard 110, and order is transferred to FPGA unit 50；

B, FPGA unit 50 generates control signal, makes to emit the pulse that the generation of driving unit 20 meets cerebral MRI probe 10 Signal；

C, transmitting pulse signal driving cerebral MRI probe 10 generates ultrasonic wave；

D, cerebral MRI probe 10 will be converted into electric signal by the echo-signal of brain tissue modulation；

E, electric signal is amplified and preliminary filtering by signal processing unit 30, signal processing gain amplifier and Filtering bandwidth is adjustable；

F, enter AD conversion unit 40 by the ultrasound echo signal of signal processing to be sampled, number is switched to after sampling Signal enters FPGA unit 50；

G, the processing such as digital signal filter and detection is carried out in FPGA unit 50, is eliminated noise and useless small signal, is obtained To the peak signal (as shown in Figure 4) of brain middle line；

H, the peak signal of brain middle line is transmitted to arm processor 80, and the measurement of arm processor 80 is since sampling to peak signal The intermediate time, by this time calculate head side to brain middle line distance；

I, automatic repetition a-g step can be cooperateed in head side FPGA unit 50 and arm processor 80, is measured several times As a result, obtaining average value.An average value is also similarly measured in the symmetrical other side of head, later compares two average values Compared with, obtain analysis result.Signal curve is also intuitively plotted on LCD display 70 by FPGA unit 50 in measurement process.

As shown in Figure 4: upper and lower two curves are respectively the song that FPGA unit 50 is drawn on LCD display 70 according to echo Line；In upper graph, arm processor 80 starts timing at S1, stops timing at S2, a time T is obtained, if V is The velocity of sound in brain, to obtain the distance L1 for arriving brain middle line on the left of head according to formula L=V*T/2, similarly obtain head Distance L2 of the right side to brain middle line.Arm processor 80 obtains the deviant of brain middle line according to L1 and L2, and calculated result is shown On LCD display 70.

Above are merely preferred embodiments of the utility model, it should be pointed out that: for the ordinary skill people of the art For member, without departing from the principle of this utility model, several improvements and modifications can also be made, these improvements and modifications Also it should be regarded as the protection scope of the utility model.

Claims (6)

1. one kind can measure the ultrasonic system of brainpan middle line, including cerebral MRI probe, it is characterised in that: the cerebral MRI Probe (10) is electrically connected with transmitting driving unit (20) input terminal, transmitting driving unit (20) output end and signal processing list First (30) input terminal electrical connection, signal processing unit (30) output end is by AD conversion unit (40) and for ultrasound letter Number processing FPGA unit (50) electrical connection；

The FPGA unit (50) is electrically connected with memory (60), LCD display (70), arm processor (80) respectively again, described Arm processor (80) is electrically connected with keyboard (110) again；

It further include that the internal battery (90) and power circuit (100) of power supply are provided for whole system.

2. the ultrasonic system that one kind according to claim 1 can measure brainpan middle line, it is characterised in that: the cranium brain is super Sonic probe (10) is A-mode ultrasonic probe, is popped one's head in as single array element, 1 ~ 2MHz of frequency.

3. the ultrasonic system that one kind according to claim 1 can measure brainpan middle line, it is characterised in that: the FPGA is mono- First (50) handle chip using EP4CE6E22C8.

4. the ultrasonic system that one kind according to claim 1 can measure brainpan middle line, it is characterised in that: at the ARM It manages device (80) and chip is handled using STM32F103.

5. the ultrasonic system that one kind according to claim 1 can measure brainpan middle line, it is characterised in that: the modulus turns Unit (40) are changed using AD9235 conversion chip.

6. the ultrasonic system that one kind according to claim 1 can measure brainpan middle line, it is characterised in that: at the signal It manages unit (30) and uses AD8331 signal amplification chip.